Knox County, ME — Solar Development Risk Assessment

No Moratorium

None codified at county level. Municipal CUP/SUP in organized areas; LUPC in unorganized territories.

Municipal CUP/SUP (organized areas); LUPC permit (unorganized territories).

Generally receptive — agricultural; coastal fishing; SLODA pathway; tourism minor friction

Midcoast ME; Rockland area; lobster fishing; coastal tourism; active solar in agricultural areas; SLODA >20 acres; local zoning; coastal identity minor friction

Improving

Strong home rule tradition; dual-track permitting in organized municipalities. Maine DEP Site Location of Development Act (SLODA): required for developments >20 acres (catches most utility-scale solar); standards address stormwater, groundwater, wildlife, aesthetics. Natural Resources Protection Act (NRPA): separate DEP permit for projects affecting wetlands, significant wildlife habitat, or other protected natural resources. Local zoning: organized municipalities (most of southern/coastal ME) require local permits in addition to state permits — dual track; a moratorium can be imposed even after state permits issued (unique ME vested rights doctrine). Land Use Planning Commission (LUPC): governs ~10.5 million acres of Unorganized Territory (UT) in northern/remote ME (much of Aroostook, Piscataquis, Somerset, Penobscot, Washington, Franklin, Oxford, Hancock counties). DACF Permit: required for solar ≥5 acres on High-Value Agricultural Land (HVAL) — new, eff. April 20, 2025. Aroostook and Washington counties (far NE): outside ISO-NE footprint; served by Versant Power (Emera). Central ME Power (Avangrid) and Versant Power are Maine's two investor-owned utilities.

Maine RPS: 80% renewable by 2030; 100% by 2050 (LD 1494, enacted 2019). Net Energy Billing (NEB): Maine's community solar program; subscription-based bill credits; Nautilus Solar, Greenbacker, MN8 Energy (formerly Goldman Sachs) are major operators in ME. Maine CEDF (Clean Energy Development Fund): grants for renewable energy projects via MPUC/CEF. Competitive solicitations: multi-state RFPs (ME, CT, MA, VT) for new solar capacity. Utility: Central Maine Power (CMP/Avangrid) serves southern/central ME; Versant Power (EMERA Maine) serves northern ME and Bangor area.

Nautilus Solar (TurningPoint Energy): 4.8 MW Knox County array operational 2025 (Mainebiz Nov 17 2025). Earlier Nautilus 18.6 MW portfolio includes Knox County (Aug 2022). Nautilus also acquired earlier Knox County projects (March 2021, PenBay Pilot). CMP utility territory.

ME DEP 2024 proposed rules: discourage solar on prime farmland (Bangor Daily News Aug 14 2024). SLODA: DEP review for >20 acres cleared or >3 MW. NRPA: wetlands/stream buffers. LUPC governs unorganized territories (~10.4M acres). Source: ME DEP; SLODA 38 MRSA §481; Bangor Daily News Aug 14 2024