Harford County, MD interconnection queue
1 interconnection applications are pending in Harford County, MD, requesting 500 MW of new generating capacity, as of 15 August 2026. 8 projects have been built here and 11 have been withdrawn since 1999.
Source: interconnection queues published by PJM. Parsed and normalised by Watt Street. Data as of 15 August 2026. A queued project is a request, not a commitment.
What is waiting in Harford County, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Battery | 1 | 500 MW |
Outcomes of every application filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 8 | 1.6 GW | 40.0% |
| Still pending | 1 | 500 MW | 5.0% |
| Withdrawn | 11 | 4.0 GW | 55.0% |
| Suspended | 0 | — | 0.0% |
Withdrawal is the ordinary outcome of an interconnection application nationally, not a sign of a problem in this county. Most withdrawals are a developer testing a site and moving on.
The largest projects on file
| Project | Fuel | Capacity | Status | Filed | Queue |
|---|---|---|---|---|---|
| Perryman 230kV/115kV | Gas | 750 MW | withdrawn | 1999-11 | PJM |
| Perryman 230kV or 115kV | Gas | 740 MW | withdrawn | 1999-04 | PJM |
| Conowingo 230kV | Hydro | 617 MW | withdrawn | 2013-04 | PJM |
| Conowingo | Hydro | 572 MW | completed | 2007-01 | PJM |
| Graceton 230kV | Gas | 550 MW | withdrawn | 1999-11 | PJM |
| Conastone - Peach Bottom 500kV | Gas | 550 MW | withdrawn | 2000-03 | PJM |
| Conastone - Peach Bottom 500kV | Gas | 550 MW | withdrawn | 2000-03 | PJM |
| Conowingo 230kV | Hydro | 548 MW | completed | 1999-11 | PJM |
| Conastone 500 kV | Battery | 500 MW | active | 2025-04 | PJM |
| Perryman | Gas | 183 MW | completed | 2008-01 | PJM |
| Perryman 115kV | Coal | 152 MW | completed | 2001-05 | PJM |
| Perryman | Gas | 130 MW | completed | 2007-05 | PJM |
| Conastone-Northwest 230kV | Unknown | 102 MW | withdrawn | 2015-02 | PJM |
| Graceton 230 kV | Solar | 50 MW | withdrawn | 2021-03 | PJM |
| Graceton | Battery | 20 MW | withdrawn | 2008-01 | PJM |
How this county ranks
Harford County ranks #616 of 1,607 US counties by capacity currently queued, and #3 of 22 in Maryland.
Other Maryland counties in the queue
| County | Pending | Capacity queued |
|---|---|---|
| Prince George's County | 2 | 1.5 GW |
| Garrett County | 3 | 675 MW |
| Montgomery County | 1 | 500 MW |
| Caroline County | 1 | 145 MW |
| Baltimore city | 1 | 135 MW |
| Charles County | 1 | 110 MW |
| Allegany County | 1 | 80 MW |
| Anne Arundel County | 1 | 55 MW |
Go deeper on Harford County
The interactive map plots every one of these applications, and a generated county report puts them in a sourced PDF with the date each figure was true on every page.
Open Harford County on the map County reports All of Maryland