Soulajule dam
Soulajule
Soulajule Reservoir, located in Marin County, California, is a vital water supply source with a storage capacity of 10,700 acre-feet. The dam, completed in 1979, stands at a height of 122 feet along the Arroyo Sausal stream. Managed by a public utility, the reservoir plays a crucial role in ensuring water security for the surrounding communities, particularly in times of drought and increasing water demand.
State-regulated and inspected, Soulajule Reservoir's dam has a high hazard potential but is currently assessed as satisfactory. With a drainage area of 18.7 square miles and a surface area of 310 acres, the reservoir serves as a reliable water storage facility. The dam's emergency action plan and risk management measures are in place to address any potential safety concerns, with regular inspections and assessments ensuring the structure's integrity and functionality for water resource management.
Owned and operated by the state of California, Soulajule Reservoir plays a key role in the region's water supply infrastructure. With its critical location in the Tomales area and under the jurisdiction of the Department of Water Resources, the dam stands as a testament to effective water resource management and climate resilience efforts in the face of changing environmental conditions. As a significant Earth-type dam, Soulajule Reservoir serves as a vital asset in ensuring water security for the community while adhering to stringent regulatory standards and safety protocols.
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 Soulajule -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Walker C Nr Marshall Ca | 5 cfs | → |
| Lagunitas C Nr Pt Reyes Station Ca | 16 cfs | → |
| Olema C A Vedanta Bridge A Olema Ca | 1 cfs | → |
| Lagunitas C A Sp Taylor State Pk Ca | 14 cfs | → |
| Petaluma R A Copland Pumping Station A Petaluma Ca | 90 cfs | → |
| Novato C A Novato Ca | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Soulajule.
Boat launches
- Sears Point Road 100-138, Novato
- Calypso Shores 23, Marin County
- Steven Way 98, Marin County
- Doran Beach Road 355, Bodega Bay
- Marin Rod And Gun Club Pier 2675, San Rafael
- Turney Street Boat Ramp
Campgrounds
Fishing spots
- Lake Lagunitas
- Bodega Harbor
- Lake Ralphine
- Berkeley Yacht Harbor
- San Pablo Reservoir
- 9th Street Boat Ramp
Paddle runs
- Olema Ranch Campground To Caltrans Corporation Yard At Point Reyes Station
- 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.
- Headwaters To Mouth
Track Soulajule 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 Soulajule
Where does the data for Soulajule 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 Soulajule.