Water Resources of the Little Tonsina River, Alaska: Stream Gage Data, 2014–2020

This report summarizes stream gage information collected by the Bureau of Land Management (BLM) from 2014 to 2020 in the Little Tonsina River watershed. The information presented supports achievement of various BLM management goals and objectives for this watershed, with an emphasis on the Little Tonsina River corridor. The Little Tonsina River watershed drains approximately 85 square miles, with the river originating in the Chugach Range at about 4,500 feet and flowing north 19 miles to the Tonsina River, which drains into the Copper River and ultimately the Gulf of Alaska. The Little Tonsina River is a high-value anadromous stream and provides a variety of recreational, fish, wildlife, and other socioeconomic values. Management objectives established for the Little Tonsina River include maintaining the pristine, free-flowing condition of the river and tributaries, optimal and long-term utilization of its fish and wildlife resources, and high-quality primitive recreational opportunities. This report summarizes BLM long-term gage data referenced to U.S. Geological Survey historical gage data, BLM instantaneous gage data, and other relevant hydrologic and physical information to support achievement of these and other BLM management goals and objectives for the Little Tonsina watershed.