New Lake Arrowhead dam
New Lake Arrowhead
New Lake Arrowhead, located in San Bernardino, California, is a vital water resource for the local community. Constructed in 1976, this earth dam stands at a height of 225 feet and has a hydraulic height of 216 feet, providing a maximum storage capacity of 1970 acre-feet. With a primary purpose of water supply, this reservoir also serves for recreational activities, covering a surface area of 31 acres and drawing water from the Little Bear Creek.
Managed by the local government and regulated by the Department of Water Resources and Safety of Dams, New Lake Arrowhead is subject to regular inspections to ensure its structural integrity. Despite being labeled as having a high hazard potential, the dam's condition was assessed as satisfactory in 2017. Emergency action plans are in place, and the last revision was conducted in December 2020, reflecting a commitment to ensuring the safety of the surrounding area in case of any unforeseen events.
For water resource and climate enthusiasts, New Lake Arrowhead presents an intriguing case study in water management and infrastructure. Its role in providing water supply while offering recreational opportunities highlights the multifaceted nature of modern dam projects. With a rich history dating back to the 1970s and ongoing efforts to maintain its safety and functionality, this reservoir stands as a testament to the importance of sustainable water resource management in the face of changing environmental conditions.
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 New Lake Arrowhead -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Deep C Nr Hesperia Ca | 14 cfs | → |
| Waterman Cyn C Nr Arrowhead Spgs Ca | 1 cfs | → |
| Wf Mojave R Ab Mojave R Forks Res Nr Hesperia Ca | 9 cfs | → |
| Sand Canyon C Nr Highland Ca | 1 cfs | → |
| City C Nr Highland Ca | 3 cfs | → |
| E Twin C Nr Arrowhead Springs Ca | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near New Lake Arrowhead.
Campgrounds
- North Shore Family Campground
- North Shore Campground
- Fisherman's Group Campground
- Dogwood Family Campground
- Fisherman's Group Camp
- Dogwood Campground
Fishing spots
- Deep Creek
- Green Valley Lake
- Arrowbear Lake
- Lake Gregory
- Lake Gregory County Regional Park
- Silverwood Lake
Track New Lake Arrowhead 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 New Lake Arrowhead
Where does the data for New Lake Arrowhead 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 New Lake Arrowhead.