Pond No. 2 dam
Pond No. 2
Pond No. 2 is a vital water resource infrastructure located in Santa Rosa, California, with a primary purpose of water supply. Built in 1952, this offstream earth dam stands at 12 feet high and has a storage capacity of 290 acre-feet. It serves numerous purposes including flood risk reduction, irrigation, and water supply for the local community.
Managed by the local government and regulated by the California Department of Water Resources (DWR), Pond No. 2 has a low hazard potential and is deemed to be in satisfactory condition as of the last assessment in September 2017. The dam has a drainage area of 0.08 square miles and covers a surface area of 54 acres. With a hydraulic height of 10.5 feet, this infrastructure plays a crucial role in maintaining water security in the region.
Despite its relatively modest size, Pond No. 2 is a key component of the water management system in Sonoma County. With its efficient design and satisfactory condition, this earth dam ensures the reliable supply of water for various purposes while minimizing flood risks and supporting irrigation practices in the area. As climate change continues to impact water resources, the importance of well-maintained structures like Pond No. 2 becomes increasingly apparent for sustainable water management in the region.
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 Pond No. 2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Santa Rosa C A Santa Rosa Ca | 19 cfs | → |
| Colgan C Nr Santa Rosa Ca | 1 cfs | → |
| Matanzas C A Santa Rosa Ca | 3 cfs | → |
| Santa Rosa C A Willowside Rd Nr Santa Rosa Ca | 10 cfs | → |
| Laguna De Santa Rosa C Nr Sebastopol Ca | 3 cfs | → |
| Colgan C Nr Sebastopol Ca | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pond No. 2.
Boat launches
- Doran Beach Road 355, Bodega Bay
- Public Boat Ramp Spur Sonoma County
- Sears Point Road 100-138, Novato
- Calypso Shores 23, Marin County
- Napa Valley Vine Trail, Napa
- Cuttings Wharf Road 3175-3337, Napa
Campgrounds
- Sonoma County Fairgrounds Rv Park
- Spring Lake Regional Park
- Sugarloaf Ridge State Park
- Camp Via (Sonoma Developmental Center)
- Napa County Fairgrounds
- Bothe - Napa Valley State Park
Fishing spots
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.
- Cache Creek
- Headwaters To Mouth
More reservoirs
Track Pond No. 2 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 Pond No. 2
Where does the data for Pond No. 2 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 Low 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 Pond No. 2.