{ "type": "FeatureCollection", "metadata": { "title": "Maryland electricity import/export transmission crossings", "generated_date": "2026-08-09", "crossing_definition": "HIFLD transmission lines that have geometry both inside and outside the official Maryland boundary", "corridor_count": 78, "line_crossing_count": 107, "cluster_distance_meters": 120, "flow_scope": "EIA statewide annual net interstate trade; not a measurement for any individual mapped line", "estimated_crossing_flow_method": "Statewide average net import MW allocated across crossings in proportion to voltage-weighted co-located circuit count. Estimates are for visual planning only.", "sources": [ { "label": "HIFLD U.S. Electric Power Transmission Lines (2024)", "url": "https://www.arcgis.com/home/item.html?id=d4090758322c4d32a4cd002ffaa0aa12" }, { "label": "Maryland iMAP State Boundary", "url": "https://mdgeodata.md.gov/imap/rest/services/Boundaries/MD_PoliticalBoundaries/FeatureServer/0" }, { "label": "U.S. Census Bureau TIGERweb State Boundaries", "url": "https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/State_County/MapServer/0" }, { "label": "EIA Maryland State Electricity Profile, table 10", "url": "https://www.eia.gov/electricity/state/maryland/state_tables.php" }, { "label": "PJM 2025 Maryland and D.C. State Infrastructure Report", "url": "https://www.pjm.com/-/media/DotCom/library/reports-notices/state-specific-reports/2025/maryland-dc.pdf" } ] }, "features": [ { "type": "Feature", "id": "md-interchange-001", "geometry": { "type": "Point", "coordinates": [ -79.48699, 39.295647 ] }, "properties": { "crossing_id": "MD-X-001", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "122995", "owners": "Not published", "voltage_kv": "500", "voltage_classes": "500", "named_substations": "MOUNT STORM; PRUNTYTOWN", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 0, "estimated_average_interchange_mw": 78.1, "estimated_interchange_share_percent": 2.53, "estimated_interchange_weight": 500.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-002", "geometry": { "type": "Point", "coordinates": [ -79.486651, 39.225789 ] }, "properties": { "crossing_id": "MD-X-002", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "128850", "owners": "Not published", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "ROTH ROCK NORTH WIND FARM, LLC", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -35, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-003", "geometry": { "type": "Point", "coordinates": [ -79.483472, 39.412495 ] }, "properties": { "crossing_id": "MD-X-003", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "125800", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "Not published", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 0, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-004", "geometry": { "type": "Point", "coordinates": [ -79.482992, 39.45096 ] }, "properties": { "crossing_id": "MD-X-004", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 2, "line_ids": "118740; 137502", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 0, "estimated_average_interchange_mw": 43.1, "estimated_interchange_share_percent": 1.4, "estimated_interchange_weight": 276.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-005", "geometry": { "type": "Point", "coordinates": [ -79.478828, 39.535255 ] }, "properties": { "crossing_id": "MD-X-005", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "117391", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 0, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-006", "geometry": { "type": "Point", "coordinates": [ -79.476744, 39.678002 ] }, "properties": { "crossing_id": "MD-X-006", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "122979", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 0, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-007", "geometry": { "type": "Point", "coordinates": [ -79.475736, 39.721125 ] }, "properties": { "crossing_id": "MD-X-007", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "119817", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "500", "voltage_classes": "500", "named_substations": "BLACK OAK; HATFIELD", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 55, "estimated_average_interchange_mw": 78.1, "estimated_interchange_share_percent": 2.53, "estimated_interchange_weight": 500.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-008", "geometry": { "type": "Point", "coordinates": [ -79.394192, 39.258572 ] }, "properties": { "crossing_id": "MD-X-008", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "122995", "owners": "Not published", "voltage_kv": "500", "voltage_classes": "500", "named_substations": "MOUNT STORM; PRUNTYTOWN", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 210, "estimated_average_interchange_mw": 78.1, "estimated_interchange_share_percent": 2.53, "estimated_interchange_weight": 500.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-009", "geometry": { "type": "Point", "coordinates": [ -79.334702, 39.721549 ] }, "properties": { "crossing_id": "MD-X-009", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "123833", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "115", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 18.0, "estimated_interchange_share_percent": 0.58, "estimated_interchange_weight": 115.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-010", "geometry": { "type": "Point", "coordinates": [ -79.199523, 39.383645 ] }, "properties": { "crossing_id": "MD-X-010", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "124319", "owners": "Not published", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 215, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-011", "geometry": { "type": "Point", "coordinates": [ -79.116244, 39.438037 ] }, "properties": { "crossing_id": "MD-X-011", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "127455", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 225, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-012", "geometry": { "type": "Point", "coordinates": [ -79.059635, 39.471438 ] }, "properties": { "crossing_id": "MD-X-012", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "115328", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 225, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-013", "geometry": { "type": "Point", "coordinates": [ -79.00359, 39.458956 ] }, "properties": { "crossing_id": "MD-X-013", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "102674", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "BLACK OAK", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -55, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-014", "geometry": { "type": "Point", "coordinates": [ -78.910825, 39.495546 ] }, "properties": { "crossing_id": "MD-X-014", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "117294", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "BLACK OAK", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 230, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-015", "geometry": { "type": "Point", "coordinates": [ -78.908537, 39.496963 ] }, "properties": { "crossing_id": "MD-X-015", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "138105", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "500", "voltage_classes": "500", "named_substations": "BEDINGTON; BLACK OAK", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 225, "estimated_average_interchange_mw": 78.1, "estimated_interchange_share_percent": 2.53, "estimated_interchange_weight": 500.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-016", "geometry": { "type": "Point", "coordinates": [ -78.907597, 39.498162 ] }, "properties": { "crossing_id": "MD-X-016", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "121013", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "BLACK OAK", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 220, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-017", "geometry": { "type": "Point", "coordinates": [ -78.898779, 39.722782 ] }, "properties": { "crossing_id": "MD-X-017", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "113135", "owners": "ALLEGHENY POWER SYSTEMS", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-018", "geometry": { "type": "Point", "coordinates": [ -78.837634, 39.567276 ] }, "properties": { "crossing_id": "MD-X-018", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "175505", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "Not published", "voltage_classes": "NOT AVAILABLE", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 235, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-019", "geometry": { "type": "Point", "coordinates": [ -78.797111, 39.630313 ] }, "properties": { "crossing_id": "MD-X-019", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 2, "line_ids": "105991; 107694", "owners": "ALLEGHENY POWER SYSTEMS; THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "FROSTBURG #1; RIDGELEY", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 190, "estimated_average_interchange_mw": 43.1, "estimated_interchange_share_percent": 1.4, "estimated_interchange_weight": 276.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-020", "geometry": { "type": "Point", "coordinates": [ -78.778465, 39.624401 ] }, "properties": { "crossing_id": "MD-X-020", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "131648", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "RIDGELEY", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -35, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-021", "geometry": { "type": "Point", "coordinates": [ -78.778158, 39.641193 ] }, "properties": { "crossing_id": "MD-X-021", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 2, "line_ids": "147978; 148454", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "RIDGELEY", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 240, "estimated_average_interchange_mw": 43.1, "estimated_interchange_share_percent": 1.4, "estimated_interchange_weight": 276.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-022", "geometry": { "type": "Point", "coordinates": [ -78.777564, 39.64241 ] }, "properties": { "crossing_id": "MD-X-022", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "121569", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 240, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-023", "geometry": { "type": "Point", "coordinates": [ -78.776485, 39.628724 ] }, "properties": { "crossing_id": "MD-X-023", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "139454", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "RIDGELEY; RISER167199", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -35, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-024", "geometry": { "type": "Point", "coordinates": [ -78.769885, 39.594414 ] }, "properties": { "crossing_id": "MD-X-024", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "104919", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "Not published", "voltage_classes": "100-161", "named_substations": "RIDGELEY", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -10, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-025", "geometry": { "type": "Point", "coordinates": [ -78.754937, 39.623764 ] }, "properties": { "crossing_id": "MD-X-025", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "131648", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "RIDGELEY", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -70, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-026", "geometry": { "type": "Point", "coordinates": [ -78.749207, 39.60688 ] }, "properties": { "crossing_id": "MD-X-026", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "114403", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "Not published", "voltage_classes": "NOT AVAILABLE", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 15, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-027", "geometry": { "type": "Point", "coordinates": [ -78.733763, 39.617661 ] }, "properties": { "crossing_id": "MD-X-027", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "120273", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "Not published", "voltage_classes": "NOT AVAILABLE", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -5, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-028", "geometry": { "type": "Point", "coordinates": [ -78.419631, 39.602917 ] }, "properties": { "crossing_id": "MD-X-028", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "100314", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 195, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-029", "geometry": { "type": "Point", "coordinates": [ -78.095493, 39.722307 ] }, "properties": { "crossing_id": "MD-X-029", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "121154", "owners": "Not published", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "CHERRY RUN; WARFORDSBURG", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 70, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-030", "geometry": { "type": "Point", "coordinates": [ -78.068009, 39.661155 ] }, "properties": { "crossing_id": "MD-X-030", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "121154", "owners": "Not published", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "CHERRY RUN; WARFORDSBURG", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -45, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-031", "geometry": { "type": "Point", "coordinates": [ -77.8662, 39.523358 ] }, "properties": { "crossing_id": "MD-X-031", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "144274", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "BEDINGTON", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -60, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-032", "geometry": { "type": "Point", "coordinates": [ -77.845837, 39.564399 ] }, "properties": { "crossing_id": "MD-X-032", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "144274", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "BEDINGTON", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 30, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-033", "geometry": { "type": "Point", "coordinates": [ -77.836214, 39.604606 ] }, "properties": { "crossing_id": "MD-X-033", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 2, "line_ids": "103032; 112892", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "NIPETOWN; REID", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -20, "estimated_average_interchange_mw": 43.1, "estimated_interchange_share_percent": 1.4, "estimated_interchange_weight": 276.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-034", "geometry": { "type": "Point", "coordinates": [ -77.830602, 39.595255 ] }, "properties": { "crossing_id": "MD-X-034", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 4, "line_ids": "112576; 118250; 128752; 136545", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161, NOT AVAILABLE", "named_substations": "FIRSTENERGY R PAUL SMITH POWER STATION", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -5, "estimated_average_interchange_mw": 86.2, "estimated_interchange_share_percent": 2.79, "estimated_interchange_weight": 552.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-035", "geometry": { "type": "Point", "coordinates": [ -77.830365, 39.594176 ] }, "properties": { "crossing_id": "MD-X-035", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 1, "line_ids": "146884", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "FIRSTENERGY R PAUL SMITH POWER STATION", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -5, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-036", "geometry": { "type": "Point", "coordinates": [ -77.829783, 39.589056 ] }, "properties": { "crossing_id": "MD-X-036", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 3, "line_ids": "101021; 116952; 141545", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "BEDINGTON", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 0, "estimated_average_interchange_mw": 64.7, "estimated_interchange_share_percent": 2.1, "estimated_interchange_weight": 414.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-037", "geometry": { "type": "Point", "coordinates": [ -77.818899, 39.493383 ] }, "properties": { "crossing_id": "MD-X-037", "name": "West Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "West Virginia", "line_count": 2, "line_ids": "137883; 141545", "owners": "THE POTOMAC EDISON COMPANY", "voltage_kv": "138, 500", "voltage_classes": "100-161, 500", "named_substations": "BEDINGTON; DOUBS", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -60, "estimated_average_interchange_mw": 99.7, "estimated_interchange_share_percent": 3.23, "estimated_interchange_weight": 638.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-038", "geometry": { "type": "Point", "coordinates": [ -77.688896, 39.720891 ] }, "properties": { "crossing_id": "MD-X-038", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "135962", "owners": "Not published", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "ANTRIM; REID", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-039", "geometry": { "type": "Point", "coordinates": [ -77.600804, 39.720433 ] }, "properties": { "crossing_id": "MD-X-039", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "108343", "owners": "Not published", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "EAST WAYNESBORO; RINGGOLD", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-040", "geometry": { "type": "Point", "coordinates": [ -77.561981, 39.299883 ] }, "properties": { "crossing_id": "MD-X-040", "name": "Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "Virginia", "line_count": 2, "line_ids": "109900; 164656", "owners": "THE POTOMAC EDISON CO", "voltage_kv": "138, 500", "voltage_classes": "100-161, 500", "named_substations": "DOUBS; LOVETTSVILLE; NEW CREEK WIND", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -5, "estimated_average_interchange_mw": 99.7, "estimated_interchange_share_percent": 3.23, "estimated_interchange_weight": 638.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-041", "geometry": { "type": "Point", "coordinates": [ -77.504082, 39.115228 ] }, "properties": { "crossing_id": "MD-X-041", "name": "Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "Virginia", "line_count": 3, "line_ids": "118651; 123295; 129535", "owners": "Not published", "voltage_kv": "230, 500", "voltage_classes": "220-287, 500", "named_substations": "DICKERSON; DOUBS; GOOSE CREEK", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -75, "estimated_average_interchange_mw": 150.0, "estimated_interchange_share_percent": 4.86, "estimated_interchange_weight": 960.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-042", "geometry": { "type": "Point", "coordinates": [ -77.274285, 38.549933 ] }, "properties": { "crossing_id": "MD-X-042", "name": "Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "Virginia", "line_count": 1, "line_ids": "126640", "owners": "Not published", "voltage_kv": "500", "voltage_classes": "500", "named_substations": "BURCHES HILL", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 45, "estimated_average_interchange_mw": 78.1, "estimated_interchange_share_percent": 2.53, "estimated_interchange_weight": 500.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-043", "geometry": { "type": "Point", "coordinates": [ -77.136326, 39.719942 ] }, "properties": { "crossing_id": "MD-X-043", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "119323", "owners": "Not published", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-044", "geometry": { "type": "Point", "coordinates": [ -77.087223, 38.959626 ] }, "properties": { "crossing_id": "MD-X-044", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 3, "line_ids": "159794; 159795; 159796", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "BETHESDA; VAN NESS", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 225, "estimated_average_interchange_mw": 64.7, "estimated_interchange_share_percent": 2.1, "estimated_interchange_weight": 414.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-045", "geometry": { "type": "Point", "coordinates": [ -77.086035, 38.960568 ] }, "properties": { "crossing_id": "MD-X-045", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 2, "line_ids": "159918; 161202", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "BETHESDA; HARRISON", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 225, "estimated_average_interchange_mw": 43.1, "estimated_interchange_share_percent": 1.4, "estimated_interchange_weight": 276.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-046", "geometry": { "type": "Point", "coordinates": [ -77.083624, 38.962422 ] }, "properties": { "crossing_id": "MD-X-046", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 1, "line_ids": "159775", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "BETHESDA; O ST", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 225, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-047", "geometry": { "type": "Point", "coordinates": [ -77.01502, 38.810429 ] }, "properties": { "crossing_id": "MD-X-047", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 2, "line_ids": "142535; 159812", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "230, 69", "voltage_classes": "220-287, UNDER 100", "named_substations": "BLUE PLAINS; PALMERS CORNER", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 45, "estimated_average_interchange_mw": 46.7, "estimated_interchange_share_percent": 1.51, "estimated_interchange_weight": 299.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-048", "geometry": { "type": "Point", "coordinates": [ -77.003274, 38.966323 ] }, "properties": { "crossing_id": "MD-X-048", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 2, "line_ids": "159939; 162492", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "69", "voltage_classes": "UNDER 100", "named_substations": "FORT SLOCUM; TOKOMA", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -45, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-049", "geometry": { "type": "Point", "coordinates": [ -77.00155, 38.964976 ] }, "properties": { "crossing_id": "MD-X-049", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 1, "line_ids": "159944", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "69", "voltage_classes": "UNDER 100", "named_substations": "O ST; TOKOMA", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -45, "estimated_average_interchange_mw": 10.8, "estimated_interchange_share_percent": 0.35, "estimated_interchange_weight": 69.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-050", "geometry": { "type": "Point", "coordinates": [ -76.992597, 39.720377 ] }, "properties": { "crossing_id": "MD-X-050", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "147672", "owners": "Not published", "voltage_kv": "500", "voltage_classes": "500", "named_substations": "CONASTONE", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 78.1, "estimated_interchange_share_percent": 2.53, "estimated_interchange_weight": 500.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-051", "geometry": { "type": "Point", "coordinates": [ -76.98015, 38.83774 ] }, "properties": { "crossing_id": "MD-X-051", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 2, "line_ids": "159804; 159805", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "230", "voltage_classes": "220-287", "named_substations": "ALABAMA AVENUE; PALMERS CORNER", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 45, "estimated_average_interchange_mw": 71.9, "estimated_interchange_share_percent": 2.33, "estimated_interchange_weight": 460.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-052", "geometry": { "type": "Point", "coordinates": [ -76.964678, 38.936159 ] }, "properties": { "crossing_id": "MD-X-052", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 1, "line_ids": "159942", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "115", "voltage_classes": "100-161", "named_substations": "BLADENSBURG; PEPCO HARVARD", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -45, "estimated_average_interchange_mw": 18.0, "estimated_interchange_share_percent": 0.58, "estimated_interchange_weight": 115.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-053", "geometry": { "type": "Point", "coordinates": [ -76.95739, 38.930455 ] }, "properties": { "crossing_id": "MD-X-053", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 2, "line_ids": "159917; 161201", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "115", "voltage_classes": "100-161", "named_substations": "BLADENSBURG; TUXEDO", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -45, "estimated_average_interchange_mw": 35.9, "estimated_interchange_share_percent": 1.16, "estimated_interchange_weight": 230.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-054", "geometry": { "type": "Point", "coordinates": [ -76.940039, 38.916938 ] }, "properties": { "crossing_id": "MD-X-054", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 1, "line_ids": "174658", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "115", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -45, "estimated_average_interchange_mw": 18.0, "estimated_interchange_share_percent": 0.58, "estimated_interchange_weight": 115.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-055", "geometry": { "type": "Point", "coordinates": [ -76.932672, 38.874711 ] }, "properties": { "crossing_id": "MD-X-055", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 1, "line_ids": "159809", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "230", "voltage_classes": "220-287", "named_substations": "BUZZARD POINT; RITCHIE", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 45, "estimated_average_interchange_mw": 35.9, "estimated_interchange_share_percent": 1.16, "estimated_interchange_weight": 230.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-056", "geometry": { "type": "Point", "coordinates": [ -76.932033, 38.910587 ] }, "properties": { "crossing_id": "MD-X-056", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 2, "line_ids": "106468; 122217", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "115", "voltage_classes": "100-161", "named_substations": "BENNING (115KV); TUXEDO", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": -45, "estimated_average_interchange_mw": 35.9, "estimated_interchange_share_percent": 1.16, "estimated_interchange_weight": 230.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-057", "geometry": { "type": "Point", "coordinates": [ -76.914082, 38.889196 ] }, "properties": { "crossing_id": "MD-X-057", "name": "District of Columbia / Maryland transmission crossing", "neighboring_jurisdiction": "District of Columbia", "line_count": 1, "line_ids": "159814", "owners": "POTOMAC ELECTRIC POWER CO", "voltage_kv": "230", "voltage_classes": "220-287", "named_substations": "BENNING (230KV); RITCHIE", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 20, "estimated_average_interchange_mw": 35.9, "estimated_interchange_share_percent": 1.16, "estimated_interchange_weight": 230.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-058", "geometry": { "type": "Point", "coordinates": [ -76.571227, 39.721163 ] }, "properties": { "crossing_id": "MD-X-058", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "130291", "owners": "Not published", "voltage_kv": "230", "voltage_classes": "220-287", "named_substations": "CONASTONE; OTTER CREEK", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 35.9, "estimated_interchange_share_percent": 1.16, "estimated_interchange_weight": 230.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-059", "geometry": { "type": "Point", "coordinates": [ -76.398271, 39.721163 ] }, "properties": { "crossing_id": "MD-X-059", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 2, "line_ids": "103850; 128701", "owners": "Not published", "voltage_kv": "115", "voltage_classes": "100-161", "named_substations": "FACE ROCK; FIVE FORKS", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 35.9, "estimated_interchange_share_percent": 1.16, "estimated_interchange_weight": 230.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-060", "geometry": { "type": "Point", "coordinates": [ -76.384666, 39.721165 ] }, "properties": { "crossing_id": "MD-X-060", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "123311", "owners": "Not published", "voltage_kv": "230", "voltage_classes": "220-287", "named_substations": "GRACETON; SAFE HARBOR", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 35.9, "estimated_interchange_share_percent": 1.16, "estimated_interchange_weight": 230.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-061", "geometry": { "type": "Point", "coordinates": [ -76.365484, 39.721169 ] }, "properties": { "crossing_id": "MD-X-061", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 2, "line_ids": "103730; 142258", "owners": "PECO ENERGY CO", "voltage_kv": "230, 500", "voltage_classes": "220-287, 500", "named_substations": "CONASTONE; GRACETON; PEACH BOTTOM", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 114.1, "estimated_interchange_share_percent": 3.7, "estimated_interchange_weight": 730.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-062", "geometry": { "type": "Point", "coordinates": [ -76.184986, 39.721255 ] }, "properties": { "crossing_id": "MD-X-062", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "139171", "owners": "Not published", "voltage_kv": "Not published", "voltage_classes": "NOT AVAILABLE", "named_substations": "PERRYVILLE", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-063", "geometry": { "type": "Point", "coordinates": [ -76.182514, 39.721263 ] }, "properties": { "crossing_id": "MD-X-063", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 1, "line_ids": "108117", "owners": "PECO ENERGY CO", "voltage_kv": "500", "voltage_classes": "500", "named_substations": "PEACH BOTTOM; ROCK SPRINGS", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 78.1, "estimated_interchange_share_percent": 2.53, "estimated_interchange_weight": 500.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-064", "geometry": { "type": "Point", "coordinates": [ -76.081142, 39.721544 ] }, "properties": { "crossing_id": "MD-X-064", "name": "Pennsylvania / Maryland transmission crossing", "neighboring_jurisdiction": "Pennsylvania", "line_count": 2, "line_ids": "100378; 141806", "owners": "PECO ENERGY CO", "voltage_kv": "230", "voltage_classes": "220-287", "named_substations": "CLAY; NOTTINGHAM", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 71.9, "estimated_interchange_share_percent": 2.33, "estimated_interchange_weight": 460.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-065", "geometry": { "type": "Point", "coordinates": [ -75.785532, 39.611128 ] }, "properties": { "crossing_id": "MD-X-065", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 2, "line_ids": "101421; 138108", "owners": "DELMARVA POWER; PECO ENERGY CO", "voltage_kv": "500", "voltage_classes": "500, NOT AVAILABLE", "named_substations": "CECIL; GLASGOW; KEENEY; ROCK SPRINGS", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 175, "estimated_average_interchange_mw": 99.7, "estimated_interchange_share_percent": 3.23, "estimated_interchange_weight": 638.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-066", "geometry": { "type": "Point", "coordinates": [ -75.766643, 39.378214 ] }, "properties": { "crossing_id": "MD-X-066", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 3, "line_ids": "100913; 116252; 148868", "owners": "DELMARVA POWER", "voltage_kv": "138, 230", "voltage_classes": "100-161, 220-287", "named_substations": "KEENEY", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 175, "estimated_average_interchange_mw": 93.4, "estimated_interchange_share_percent": 3.03, "estimated_interchange_weight": 598.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-067", "geometry": { "type": "Point", "coordinates": [ -75.754076, 39.222291 ] }, "properties": { "crossing_id": "MD-X-067", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 1, "line_ids": "166661", "owners": "DELMARVA POWER", "voltage_kv": "69", "voltage_classes": "UNDER 100", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 175, "estimated_average_interchange_mw": 10.8, "estimated_interchange_share_percent": 0.35, "estimated_interchange_weight": 69.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-068", "geometry": { "type": "Point", "coordinates": [ -75.726598, 38.877871 ] }, "properties": { "crossing_id": "MD-X-068", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 1, "line_ids": "104105", "owners": "DELMARVA POWER", "voltage_kv": "230", "voltage_classes": "220-287", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 175, "estimated_average_interchange_mw": 35.9, "estimated_interchange_share_percent": 1.16, "estimated_interchange_weight": 230.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-069", "geometry": { "type": "Point", "coordinates": [ -75.697953, 38.514754 ] }, "properties": { "crossing_id": "MD-X-069", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 1, "line_ids": "121984", "owners": "DELMARVA POWER", "voltage_kv": "69", "voltage_classes": "UNDER 100", "named_substations": "LAUREL", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 175, "estimated_average_interchange_mw": 10.8, "estimated_interchange_share_percent": 0.35, "estimated_interchange_weight": 69.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-070", "geometry": { "type": "Point", "coordinates": [ -75.6941, 38.465618 ] }, "properties": { "crossing_id": "MD-X-070", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 1, "line_ids": "118550", "owners": "DELMARVA POWER", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 175, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-071", "geometry": { "type": "Point", "coordinates": [ -75.676338, 38.459446 ] }, "properties": { "crossing_id": "MD-X-071", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 2, "line_ids": "118550", "owners": "DELMARVA POWER", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 95, "estimated_average_interchange_mw": 43.1, "estimated_interchange_share_percent": 1.4, "estimated_interchange_weight": 276.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-072", "geometry": { "type": "Point", "coordinates": [ -75.581002, 38.456203 ] }, "properties": { "crossing_id": "MD-X-072", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 1, "line_ids": "173101", "owners": "DELMARVA POWER", "voltage_kv": "69", "voltage_classes": "UNDER 100", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 10.8, "estimated_interchange_share_percent": 0.35, "estimated_interchange_weight": 69.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-073", "geometry": { "type": "Point", "coordinates": [ -75.571803, 37.999008 ] }, "properties": { "crossing_id": "MD-X-073", "name": "Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "Virginia", "line_count": 1, "line_ids": "118829", "owners": "DELMARVA POWER", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "OAK HALL", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 265, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-074", "geometry": { "type": "Point", "coordinates": [ -75.530109, 38.002447 ] }, "properties": { "crossing_id": "MD-X-074", "name": "Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "Virginia", "line_count": 1, "line_ids": "103035", "owners": "DELMARVA POWER", "voltage_kv": "69", "voltage_classes": "UNDER 100", "named_substations": "COMMONWEALTH CHESAPEAKE", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 265, "estimated_average_interchange_mw": 10.8, "estimated_interchange_share_percent": 0.35, "estimated_interchange_weight": 69.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-075", "geometry": { "type": "Point", "coordinates": [ -75.459598, 38.008324 ] }, "properties": { "crossing_id": "MD-X-075", "name": "Virginia / Maryland transmission crossing", "neighboring_jurisdiction": "Virginia", "line_count": 1, "line_ids": "179364", "owners": "DELMARVA POWER", "voltage_kv": "69", "voltage_classes": "UNDER 100", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 265, "estimated_average_interchange_mw": 10.8, "estimated_interchange_share_percent": 0.35, "estimated_interchange_weight": 69.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-076", "geometry": { "type": "Point", "coordinates": [ -75.411136, 38.452494 ] }, "properties": { "crossing_id": "MD-X-076", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 1, "line_ids": "114711", "owners": "DELMARVA POWER", "voltage_kv": "230", "voltage_classes": "220-287", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 35.9, "estimated_interchange_share_percent": 1.16, "estimated_interchange_weight": 230.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-077", "geometry": { "type": "Point", "coordinates": [ -75.241689, 38.451293 ] }, "properties": { "crossing_id": "MD-X-077", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 2, "line_ids": "157154; 158475", "owners": "DELMARVA POWER", "voltage_kv": "138", "voltage_classes": "100-161", "named_substations": "RISER156259", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 90, "estimated_average_interchange_mw": 43.1, "estimated_interchange_share_percent": 1.4, "estimated_interchange_weight": 276.0, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } }, { "type": "Feature", "id": "md-interchange-078", "geometry": { "type": "Point", "coordinates": [ -75.052078, 38.451237 ] }, "properties": { "crossing_id": "MD-X-078", "name": "Delaware / Maryland transmission crossing", "neighboring_jurisdiction": "Delaware", "line_count": 1, "line_ids": "108191", "owners": "DELMARVA POWER", "voltage_kv": "Not published", "voltage_classes": "NOT AVAILABLE", "named_substations": "Not published", "flow_capability": "Bidirectional interstate interchange corridor", "line_flow_measurement": "Actual direction and MW are not published for this individual crossing", "statewide_flow_direction": "Net import", "statewide_net_import_mwh": 27111098, "statewide_average_net_import_mw": 3086.4, "statewide_flow_year": 2024, "axis_rotation_degrees": 130, "estimated_average_interchange_mw": 21.6, "estimated_interchange_share_percent": 0.7, "estimated_interchange_weight": 138, "estimated_interchange_basis": "Estimated allocation of Maryland's statewide 2024 average net import across mapped border crossings using HIFLD voltage proxy multiplied by co-located circuit count. This is a planning guess, not metered flow for this crossing." } } ] }