Hansen Recreational Lake dam
Hansen Recreational Lake
Hansen Recreational Lake, located in Los Angeles, California, is a local government-owned water resource that serves multiple purposes including water supply and recreation. The earth dam, completed in 1999, stands at a height of 50 feet and has a storage capacity of 85 acre-feet. The lake covers an area of 11 acres and is regulated by the Department of Water Resources (DWR) and Safety of Dams agency, ensuring its safety and compliance with state regulations.
With a low hazard potential and a satisfactory condition assessment as of September 2017, Hansen Recreational Lake offers a safe and enjoyable environment for water enthusiasts. The dam's primary purpose of water supply is complemented by recreational activities, making it a versatile resource for the community. Its location offstream and distance from any major river or stream adds to its appeal as a serene destination for outdoor adventures.
Visitors to Hansen Recreational Lake can appreciate the careful construction and maintenance of the dam, as evidenced by regular inspections and a solid emergency action plan. With its picturesque setting and commitment to safety, this hidden gem in the heart of Los Angeles provides a valuable water source and a peaceful escape for climate and water resource enthusiasts alike.
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 Hansen Recreational Lake -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Tujunga C Bl Hansen Dam Ca | · | → |
| Los Angeles R A Sepulveda Dam Ca | 78 cfs | → |
| Arroyo Seco Nr Pasadena Ca | 6 cfs | → |
| Santa Clara R Nr Piru Ca | 71 cfs | → |
| Rio Hondo Ab Whittier Narrows Dam Ca | 65 cfs | → |
| Rio Hondo Bl Whittier Narrows Dam Ca | 11 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hansen Recreational Lake.
Campgrounds
- Tom Lucas Trailcamp
- Group Campground 6
- Group Campground 5
- Group Campground 4
- Group Campground 3
- Group Campground 2
Fishing spots
Paddle runs
- West Fork - Headwaters (Se 1/4, Ne 1/4, Sec 14, T2n, R12w) To Cogswell Reservoir (Ne 1/4, Sw 1/4, Sec 24, T2n, R9w
- Site Of St Francis Dam Disaster To Seco Canyon At The Nf Boundary
- Green Valley At The Nf Boundary To Site Of St Francis Dam Disaster
- Gaging Station Below Spillway Of Cogswell Dam (Ne 1/4, Se 1/4, Sec 19, T2n, R10w) To Confluence With Nf San Gabriel River (Sw 1/4.Sw 1/4, Sec 15, T2n, R9w)
- Mainstream - Confluence With South Fork Little Rock Creek To Little Rock Creek Reservoir
- Cooper Canyon- Near State Highway 2 (Sw 1/4, Ne 1/4, Sec 16, T3n, R10w To Confluence With Little Rock Creek
Track Hansen Recreational 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 Hansen Recreational Lake
Where does the data for Hansen Recreational 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 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 Hansen Recreational Lake.