Bill Williams River

Alamo Lake is formed by the Alamo Dam that's part of the Alamo Lake State Park. The lake impounds runoff from the Bill Williams River, an intermittent tributary of the Colorado River. The dam was constructed in 1968 by the Army Corps of Engineers, primarily for flood control purposes. While the Bill Williams River is often dry, heavy seasonal rains...

    Full Pool: 1,129.0 MSL     Area: 17,000 Acres