Mariposa Creek Dam reservoir
As of July 15, 2026, Mariposa Creek Dam is holding 130 acre-ft of water — 77% of normal storage for this date. Storage data refreshed throughout the day.
Mariposa Creek Dam
Mariposa Creek Dam is located in Mariposa County, California, and was constructed in 1947. The dam is a zoned earthfill structure and has a height of 78 feet and a length of 650 feet. The reservoir formed by the dam has a capacity of 23,300 acre-feet and provides irrigation water to approximately 5,000 acres of farmland in the adjacent areas. The hydrology of Mariposa Creek Dam is mainly influenced by surface flow and snowpack providers such as the Sierra Nevada Mountains. The dam also serves as a recreational area, attracting visitors for activities such as fishing, boating, and camping. The Mariposa Creek Dam is regularly inspected for safety and maintenance purposes, ensuring the continued protection of the surrounding agricultural and recreational resources.
Daily levels at Mariposa Creek Dam
Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.
Storage
acre-ft · code 2
Pool Elevation
ft · code 1
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 Mariposa Creek Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Turlock Cn Nr La Grange Ca | 2,080 cfs | → |
| Tuolumne R Bl Lagrange Dam Nr Lagrange Ca | 179 cfs | → |
| Modesto Cn Nr La Grange Ca | 682 cfs | → |
| San Joaquin R Bl Friant Ca | 314 cfs | → |
| Big C Div Nr Fish Camp Ca | 0 cfs | → |
| Nf Willow C Nr Sugar Pine Ca | 416 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mariposa Creek Dam.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Mariposa Creek Dam
Where does the data for Mariposa Creek Dam come from?
Daily storage, pool elevation, and release rates are sourced from USGS, USBR, and USACE monitoring stations. Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
Storage observations are updated daily by the operating agency. The 15-day weather forecast refreshes throughout the day. Snoflo caches and renders the most recent observation -- check the "as of" timestamp on the storage card.
What does the Hazard 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 below 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 reservoir, set a threshold, and you'll get a push the moment conditions cross.