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SnoWatch: St. Vrain River Watershed


Watershed:format for printing

The St. Vrain River watershed drains about 214 square miles above the canyon mouth west of Longmont. In an average year, the St. Vrain River watershed produces about 114,000 acre-feet of water. Nearly 80% of the production (90,000 acre-feet) occurs during the peak snowmelt months of April through July.

The St. Vrain River watershed provides water to the City of Longmont and to numerous ditch and reservoir companies in eastern Boulder and western Weld counties.

Our SnoWatch system displays year-to-date snow accumulation for three SNOTELs in and near the St. Vrain River watershed. Copeland Lake SNOTEL is a low-elevation site located on the central part of the watershed. Bear Lake SNOTEL is a high-elevation site located in the neighboring Big Thompson River watershed. A relatively new SNOTEL, Wild Basin, is a middle-elevation site located near the center of the watershed. It is in its fifth year of operation. The current year of snow accumulation for Wild Basin SNOTEL is shown, but we have insufficient data to compute a median curve.