North Branch Potomac

About

North Branch Potomac River, West Virginia — 1746 Fairfax Stone, Tucker County, Allegany. The Shawnee, Seneca, and other Eastern Woodland peoples used the high Allegheny headwaters as shared hunting grounds long before European surveyors arrived. The river's name — Potomac — derives from the Algonquian word "Patawomeck," though this upper branch carried its own local names among mountain peoples. The high Alleghenies here form a landscape of cold, steep drainages that resists easy transit and rewards close familiarity.

The 1746 survey that produced the Fairfax Stone settled a boundary dispute between Thomas Fairfax, 6th Lord Fairfax of Cameron, and the Privy Council. Thomas Lewis and Peter Jefferson marked the head spring on October 23, 1746, establishing a monument that stands today in Tucker County. The North Branch headwater at that spring forms the western boundary of the Atlantic slope, where its waters interlace with the headwaters of the Ohio to define the eastern continental divide — a hydrological accident that gave one mountain spring outsized weight in colonial land politics.

By the 1830s the watershed was being logged to feed the regional timber industry, an enterprise that ran roughly from the 1850s into the 1910s alongside the 1860s–1910s railroad expansion. Sawmills, logging drives, and downstream lumber operations worked the valley through the 1920s. The old-growth stands were exhausted by 1910; state forestry conservation began in 1915, and the establishment of state forests in the 1930s ended large-scale cutting on the upper watershed.

Systematic study of the river's flows came in stages. The first comprehensive hydrological work — a USGS survey in the 1870s–1890s, gauging-station establishment across the 1880s–1910s, and state geological streamflow assessments in the 1910s–1930s — mapped a watershed already scarred by a century of cutting. Water pollution control studies in the 1950s–1970s and Clean Water Act assessments from 1972 into 2000 documented the industrial and agricultural damage that would eventually demand restoration. Today the paddling gauge is USGS station 01595800 at Barnum, West Virginia, below Jennings Randolph Lake, where optimal flows run from 500 to 2,000 cubic feet per second against a long-term average of 780.

Engineers closed the dam upstream from Piedmont in 1982, impounding Jennings Randolph Lake — a reservoir built to serve four mandates at once: flood control, pollution dilution, supplemental drinking water for Washington, DC, during droughts, and recreation. By then the North Branch had been biologically dead for decades, acid mine drainage having stripped it of life. A coordinated federal-state program using limestone neutralization began reversing the damage in 1994, restoring water quality to levels that could support aquatic life. The Maryland and West Virginia DNRs began stocking trout in the tailwater below the dam, and the once-fouled river is now a Mid-Atlantic trophy trout destination and a model of watershed recovery, with TMDL pollution limits under the Chesapeake Bay Program providing the regulatory backbone.

The river reads in three parts below the reservoir. The Barnum whitewater release delivers Class II–III water on a scheduled 5-mile run from Barnum to Bloomington. Below Bloomington the North Branch settles into a Class I–II tailwater trout reach toward Westernport, then flattens to Class I from Westernport to Keyser — the lower corridor that the Maryland and West Virginia state scenic river programs carry within their management frameworks.