Cacapon River / Fork Shenandoah River / Rockymarsh Run-Potomac River / Creek-Mill Creek / Long Marsh Run-Shenandoah River / Basin Nitrogen Impairment Index Phosphorus Impairment Index Impaired High Quality Stream / Potomac River / Patterson Creek / Willett Run-Potomac River / Bullskin Run-Shenandoah River / Run-Cherry Run-Potomac River / Lunice Creek / Opequon Creek / Run-Potomac River / /