Country United States Purpose Municipal water supply Opening date 1957 Height 58 m Catchment area 12.14 km² Construction cost 1.4 million USD | Status Operational Owner(s) City of Bremerton Opened 1957 Construction began 1955 | |
Similar Detention dam, USS Turner Joy, Puget Sound Naval Shi, Puget Sound Navy Mus, Blake Island | ||
Casad Dam is a concrete arch dam in Bremerton, Kitsap County, Washington), built starting in 1955 and completed in 1957.
Map of Casad Dam, Bremerton, WA 98312, USA
The dam is Kitsap County's only major water diversion structure, impounding Union River to form a reservoir that is the source of over half of Bremerton's municipal water supply. The water is gravity fed from the reservoir at 607 feet (185 m) in the hills to the city, most of which is at or near sea level.
Bremerton owns 95% of the land in its 3,000-acre (1,200 ha) watershed, and the Union River reservoir behind Casad Dam holds 1,400,000,000 US gallons (5,300,000 m3) of water. The city is unusual in drawing most of its water supply from an open air source, the reservoir, which can occasionally be affected by algal blooms.
The dam's intake tower underwent seismic retrofit in 2012 to withstand a 0.78 g peak acceleration in a maximum credible earthquake from the Seattle Fault which runs about four miles (7 km) away, on the north side of Green Mountain.