Green Valley Lake dam
Green Valley Lake
Green Valley Lake, a privately owned dam in Solano, California, serves as a vital water supply infrastructure for the region. Completed in 1956, this earth dam stands at a height of 40 feet and has a storage capacity of 150 acre-feet. Situated on the Dug Road Gulch, the dam supports irrigation and water supply purposes, contributing to the sustainable management of water resources in the area.
Managed by the California Department of Water Resources and subject to state regulations, Green Valley Lake has undergone regular inspections to ensure its structural integrity. Despite its high hazard potential, the dam's condition was assessed as satisfactory in September 2017. With a drainage area of 0.73 square miles and a surface area of 11 acres, the dam plays a crucial role in flood control and water storage, highlighting its importance in the local ecosystem and community.
Located in Greenville, Green Valley Lake is monitored for any potential risks and has emergency action plans in place to address any unforeseen incidents. With its significant contribution to water supply and its strategic position in the region, this dam stands as a symbol of effective water resource management and climate resilience efforts in Solano County, California.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Green Valley Lake -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Napa R Nr Napa Ca | 40 cfs | → |
| Nathanson C A Sonoma Ca | 0 cfs | → |
| Sonoma C A Agua Caliente Ca | 14 cfs | → |
| Putah C Nr Winters Ca | 402 cfs | → |
| Napa R Nr St Helena Ca | 14 cfs | → |
| Sonoma Creek A Kenwood Ca | 3 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Green Valley Lake.
Boat launches
- Napa Valley Vine Trail, Napa
- Cuttings Wharf Road 3175-3337, Napa
- Cuttings Wharf Road 3270, Napa
- North Camino Alto Vallejo
- Curtola Parkway 139-199, Vallejo
- Belden's Landing Boat Launch
Campgrounds
- Skyline Wilderness County Park
- Napa Valley Expo
- Travis Afb Military
- Browers Garden Camping - No Reservation Needed
- Rowser Garden Camping (No Reservation Needed)
- Steele Canyon Camp Site
Fishing spots
- 9th Street Boat Ramp
- City Of Benicia Fishing Pier
- Berryessa Lake
- Lake Berryessa
- San Pablo Reservoir
- Lafayette Reservoir
Paddle runs
- Headwaters To Mouth
- Headwaters To Ends One Quarter Mile South Of Bear Valley Road Bridge Segment 1: Ends 1/4 Mile South Of Bear Valley Road Bridge Segment 2: Caltrans Corporation Yard At Point Reyes Staton.
- Olema Ranch Campground To Caltrans Corporation Yard At Point Reyes Station
- Cache Creek
Track Green Valley Lake in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Green Valley Lake
Where does the data for Green Valley Lake come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the High hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Green Valley Lake.