Hendricks dam
Hendricks
Hendricks is a privately owned dam located in Mariposa, California, specifically in the city of Raymond. Completed in 1958, this earth dam stands at a height of 33 feet and has a hydraulic height of 27.8 feet. Its primary purpose is for water supply, serving irrigation and water supply needs in the area. With a storage capacity of 130 acre-feet and a drainage area of 1.15 square miles, Hendricks plays a crucial role in managing water resources in the region.
Despite its low hazard potential and satisfactory condition assessment, Hendricks is regulated by the California Department of Water Resources (DWR) under the Safety of Dams program. This state-regulated dam undergoes regular inspections, with the last assessment conducted in September 2017. The dam has a spillway type and width not specified in the data, but its associated structures and operational details are not fully disclosed. As an essential component of the local water infrastructure, Hendricks contributes to water conservation and management efforts in the Sacramento District.
With its strategic location on Tr Horse Creek, Hendricks serves as a vital resource for water supply in the region. Managed by private owners, this dam provides essential irrigation and water supply services to the community. The data indicates that Hendricks has a significant role in water storage and management, highlighting its importance for sustaining water resources in Mariposa 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 Hendricks -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big C Div Nr Fish Camp Ca | 0 cfs | → |
| Nf Willow C Nr Sugar Pine Ca | 416 cfs | → |
| San Joaquin R Bl Friant Ca | 476 cfs | → |
| Merced R A Pohono Bridge Nr Yosemite Ca | 1,480 cfs | → |
| Merced R A Happy Isles Bridge Nr Yosemite Ca | 1,130 cfs | → |
| Tuolumne R Ab Early Intake Nr Mather Ca | 1,490 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hendricks.
Boat launches
- County Road 29 Madera County
- Road 29 Madera County
- Madera County
- San Joaquin River Trail, Friant
- Redinger Boating Site
Campgrounds
- Mariposa Fairgrounds
- Cordoniz Group Area North
- Codorniz Rec Area
- Cordoniz Group Area South
- Cordoniz Campground
- Wildcat Primitive Campground
Fishing spots
Paddle runs
- Confluence With Middle Fork Tuolumne River To Confluence With Tuolumne River
- Headwaters Near The Tuolumne And Mariposa County Lines To Western Boundary Of Yosemite National Park
- Confluence With North Fork San Joaquin River To Hells Half Acre
- Clavey River From Cottonwood Road To Confluence With Tuolumne
- Hemlock Crossing To Confluence With Cora Creek
Track Hendricks 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 Hendricks
Where does the data for Hendricks 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 Hendricks.