From the drainage area and mean flow events, the Army Corp of Engineers, based on the time frame of 1903 – 1952, calculated the mean runoff to be 2,840,000 acre feet of water. The final holding capacity of Folsom Lake is 977,000 acre feet of water. The minimum amount of water is 88,000 acre feet*. That makes the holding capacity of Folsom Lake 889,000 acre feet of water. This means that in a normal or average year, enough water flows into Folsom Lake to fill it from dead pool to full capacity 3.19 times.
