Maryland Interconnection Projects
interXdata tracks 1,016 interconnection projects in Maryland representing 74,179 MW of requested capacity. The dominant technology by capacity is Gas. The most active counties are Wicomico, Montgomery, Prince Georges.
1,016Total projects
31Active
472Operational
508Withdrawn
74,179 MWRequested capacity
4,666 MWActive capacity
Technology mix
| Technology | Projects | Requested capacity |
|---|---|---|
| Gas | 206 | 41,875 MW |
| Other | 128 | 11,633 MW |
| Solar | 558 | 9,730 MW |
| Battery | 93 | 8,098 MW |
| Wind | 26 | 1,959 MW |
| Solar+Battery | 3 | 762 MW |
| Oil | 1 | 108 MW |
| Hydro | 1 | 14 MW |
Counties
| County | Projects | Requested capacity |
|---|---|---|
| Wicomico | 60 | 438 MW |
| Montgomery | 59 | 4,484 MW |
| Prince Georges | 57 | 3,112 MW |
| Dorchester | 56 | 1,707 MW |
| Harford | 55 | 5,659 MW |
| Charles | 53 | 18,444 MW |
| Prince George's | 52 | 8,497 MW |
| Garrett | 52 | 2,447 MW |
| Queen Anne's | 48 | 1,201 MW |
| Somerset | 48 | 900 MW |
| Washington | 47 | 444 MW |
| Worcester | 42 | 1,413 MW |
| Frederick | 40 | 3,671 MW |
| Cecil | 40 | 4,190 MW |
| Howard | 39 | 67 MW |
| Anne Arundel | 36 | 3,228 MW |
| Talbot | 34 | 225 MW |
| Baltimore County | 31 | 2,307 MW |
| Baltimore | 28 | 482 MW |
| Baltimore City | 26 | 468 MW |
| Allegany | 23 | 954 MW |
| Kent | 22 | 353 MW |
| Caroline | 20 | 1,161 MW |
| Calvert | 15 | 7,110 MW |
| St. Mary's | 9 | 518 MW |
| Queen Annes | 9 | 167 MW |
| Unknown | 7 | 501 MW |
| Carroll | 6 | 27 MW |
| N/a | 1 | 1 MW |
| Prince Geroges | 1 | 3 MW |
Largest projects
| Project | Queue ID | Technology | Capacity | Status | Location |
|---|---|---|---|---|---|
| Morgantown-Oak Grove | M01 | Gas | 1,800.0 MW | withdrawn | Charles, Maryland |
| Morgantown / Oak Grove | L01 | Gas | 1,800.0 MW | withdrawn | Charles, Maryland |
| Morgantown / Oak Grove | K08 | Gas | 1,800.0 MW | withdrawn | Charles, Maryland |
| Calvert Cliffs | Q77 | Other | 1,640.0 MW | withdrawn | Calvert, Maryland |
| Calvert Cliffs 500kV | V2-042 | Other | 1,640.0 MW | withdrawn | Calvert, Maryland |
| Calvert Cliffs | Q48 | Other | 1,640.0 MW | withdrawn | Calvert, Maryland |
| Talbert 230kV | S18 | Gas | 1,250.0 MW | withdrawn | Charles, Maryland |
| Morgantown 230 kV | AI2-457 | Battery | 1,122.0 MW | withdrawn | Charles, Maryland |
| Oakgrove-Morgantown 230kV | X3-103 | Gas | 971.2 MW | withdrawn | Charles, Maryland |
| Burches Hill-Possum Point 500kV | X3-102 | Gas | 971.2 MW | withdrawn | Charles, Maryland |
| Calvert Cliffs Nuclear Power Plant | 6011_2 | Other | 932.4 MW | operational | Calvert, Maryland |
| Calvert Cliffs Nuclear Power Plant | 6011_1 | Other | 918.0 MW | operational | Calvert, Maryland |
| Dickerson 230kV | G50 | Gas | 910.0 MW | withdrawn | Frederick, Maryland |
| Morgantown-Oak Grove | S29 | Gas | 900.0 MW | withdrawn | Charles, Maryland |
| Burches Hill-Brandywine 230kV | X3-087 | Gas | 894.0 MW | withdrawn | Prince George's, Maryland |
| Rock Springs 500kV | Y1-065 | Gas | 834.1 MW | operational | Cecil, Maryland |
| Morgantown-Oak Grove 230kV | X2-030 | Gas | 830.0 MW | withdrawn | Charles, Maryland |
| Aquasco 230kV | X4-026 | Gas | 792.0 MW | withdrawn | Prince George's, Maryland |
| Perryman 230kV/115kV | B29 | Gas | 750.0 MW | withdrawn | Harford, Maryland |
| Burches Hill 500kV | V3-001 | Gas | 750.0 MW | withdrawn | Prince George's, Maryland |
| Burches Hill | W1-034 | Gas | 750.0 MW | withdrawn | Prince George's, Maryland |
| Perryman 230kV or 115kV | A47 | Gas | 740.0 MW | withdrawn | Harford, Maryland |
| Burches Hill-Chalk Point 500kV | X4-035 | Gas | 735.5 MW | operational | Prince George's, Maryland |
| Morgantown-Oak Grove | V3-017 | Gas | 725.0 MW | operational | Charles, Maryland |
| Kelson Ridge 230kV | W4-044 | Gas | 725.0 MW | withdrawn | Charles, Maryland |
| Brandon Shores | 602_2 | Other | 685.1 MW | operational | Anne Arundel, Maryland |
| Brandon Shores | 602_1 | Other | 685.1 MW | operational | Anne Arundel, Maryland |
| Chalk Point 230 kV | AH1-552 - moved to TC2 | Solar | 670.2 MW | active | Prince George's, Maryland |
| PJM Queue Project AH1-552 — Solar+Battery in Prince George's, Maryland | AH1-552 | Solar+Battery | 670.2 MW | active | Prince George's, Maryland |
| Doubs 500 kV or 230 kV | G00_W39 | Gas | 668.0 MW | withdrawn | Frederick, Maryland |
Top developers in Maryland
| Developer (canonical) | Projects | Capacity |
|---|---|---|
| Old Line Energy, LLC | 3 | 120 MW |
| Richfield Solar Energy LLC | 2 | 31 MW |
| RWE Solar Development, LLC | 2 | 125 MW |
| Cardinal Energy Storage East, LLC | 2 | 1,100 MW |
| Chalk Point Steam, LLC | 2 | 778 MW |
| Kumquat & Citron Cleantech LLC | 1 | 7 MW |
| Lighthouse Keys, LLC | 1 | 200 MW |
| Crockett Solar I, LLC | 1 | 20 MW |
| Pulaski Energy Storage LLC | 1 | 135 MW |
| Forest Lane Solar, LLC | 1 | 20 MW |
| Dairy Farm Solar, L.L.C. | 1 | 55 MW |
| Church Storage LLC | 1 | 50 MW |
| DESRI Tidewater Development, L.L.C. | 1 | 110 MW |
| Carroll Island BESS I LLC | 1 | 300 MW |
| TODD SOLAR | 1 | 4 MW |
Recent material changes
| Observed | Project | Field | Old | New |
|---|---|---|---|---|
| 2026-10-07 | Black Oak-Hatfield 500 kV | proposed_online_date | 2028-03-31 | 2029-03-31 |
| 2026-10-02 | City of Bowie | proposed_online_date | 2026-09-01 | 2026-12-01 |
| 2026-10-02 | NCBP Seven | proposed_online_date | 2026-08-01 | 2026-11-01 |
| 2026-10-02 | NCBP TWELVE, LLC | proposed_online_date | 2026-08-01 | 2026-09-01 |
| 2026-10-02 | MDD109-NCBP BLDG 11-Manekin | proposed_online_date | 2026-08-01 | 2026-09-01 |
| 2026-10-02 | Richfield Solar Energy LLC | new_project | — | operational |
| 2026-10-02 | MD-ECA Salsibury | new_project | — | operational |
| 2026-10-02 | MD-CPG Salisbury Airport 2 | new_project | — | operational |
| 2026-10-02 | MD-CPG Salisbury Airport 1 | new_project | — | operational |
| 2026-10-02 | Roxbury | operational_date | — | 2026-08-01 |
| 2026-10-02 | Roxbury | proposed_online_date | 2026-08-01 | — |
| 2026-10-02 | Roxbury | status | active | operational |
Explore related data
Source last checked2026-07-31
Data last materially changed2026-10-11
Page data generated2026-10-11
Provenance: U.S. EIA — Form EIA-860M generator inventory (operating + planned); Lawrence Berkeley National Laboratory — Queued Up interconnection dataset; PJM — new-services interconnection queue. Values are normalized from public source records into the interXdata canonical warehouse; see each source for original filings.
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