Goodwin Dam is located on the Stanislaus River in California and was built in the 1920s for hydroelectric power generation and irrigation purposes. It has a capacity of 44,900 acre-feet of water and spans 690 feet across the river. The dam provides water for agricultural purposes, specifically for almond and walnut orchards, as well as for recreation such as fishing, boating, and camping. The hydrology of the area is dependent on the snowpack in the Sierra Nevada mountains, which provides a significant portion of the surface flow into the river. The dam also helps regulate the river flow and prevent flooding during heavy rains. The Goodwin Dam is an important infrastructure for the region, providing water and power to local communities.