Big Chapman Lake is a popular recreational lake located near Warsaw, Indiana. The lake was created in the 1960s by damming Chapman Creek, and it covers 630 acres with a maximum depth of 44 feet. The hydrology of the lake is influenced by precipitation, runoff, and groundwater, and specific surface flow is provided by Chapman Creek. Snowpack also contributes to the water levels in the lake during the winter months. The lake is used for a variety of recreational activities such as fishing, boating, and swimming. Agriculture also contributes to the lake's water quality, as runoff from nearby farms can affect the lake's nutrient levels. The lake is managed by the Big Chapman Lake Property Owners Association, which oversees water quality and safety measures.