Lake Cynthia in Napa, California, is a privately owned water supply reservoir on Tr Soda Creek.
Wind
Humidity
Built in 1955, this earth dam stands at 20 feet high and has a storage capacity of 92 acre-feet, serving primarily for irrigation and water supply purposes. With a drainage area of 0.65 square miles and a surface area of 12 acres, Lake Cynthia is a vital resource in the region, providing crucial water storage for agricultural and domestic use.
Despite its relatively small size, Lake Cynthia plays a significant role in water management in the area. With a high hazard potential due to its location and structural characteristics, the dam is regularly inspected and maintained to ensure its safety and integrity. The most recent inspection in September 2017 deemed the dam to be in satisfactory condition, with a comprehensive emergency action plan in place. The dam's proximity to the city of Napa and its crucial role in water supply make it a key asset in the region's water resource infrastructure, highlighting the importance of proper management and maintenance for sustainable water usage and climate resilience.
Year Completed |
1955 |
Dam Length |
750 |
Dam Height |
20 |
River Or Stream |
Tr Soda Creek |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
14.6 |
Drainage Area |
0.65 |
Nid Storage |
92 |
Hazard Potential |
High |
Nid Height |
20 |
Napa R Nr Napa Ca
|
0cfs |
Nathanson C A Sonoma Ca
|
0cfs |
Sonoma C A Agua Caliente Ca
|
3cfs |
Napa R Nr St Helena Ca
|
0cfs |
Putah C Nr Winters Ca
|
94cfs |
Sonoma Creek A Kenwood Ca
|
2cfs |
| Location | Reservations | Toilets |
|---|---|---|
Napa Valley Expo
|
||
Skyline Wilderness County Park
|
||
Steele Canyon Camp Site
|
||
Lupine Shores - Lake Berryessa - USBR
|
||
Lupine Shores Camp Site
|