Lake Mamie dam
Lake Mamie
Located in Mono County, California, Lake Mamie is a Federal-owned water supply reservoir with a primary purpose of providing water. Built in 1968, this concrete dam stands at a height of 6 feet and stretches 50 feet in length. Situated in Mammoth Lakes, the reservoir is fed by Mammoth Creek and serves multiple purposes including fish and wildlife pond, flood risk reduction, and recreation in addition to water supply.
The dam at Lake Mamie has a significant hazard potential and a very high risk assessment, making it a crucial structure for water resource and climate enthusiasts to monitor. With a controlled spillway and a valve outlet gate, the dam underwent mechanical modifications in 1968. Despite not being rated for its condition assessment, Lake Mamie remains an essential resource in the region, providing vital water supply and recreational opportunities while managing flood risks in the area.
Managed by the Forest Service, Lake Mamie's risk management measures remain unspecified, but its strategic location near Mammoth Lakes and Mammoth Creek highlights its importance in the local ecosystem. As a part of the Los Angeles District, this reservoir is a key component in the water infrastructure of Mono County, California, attracting both water resource professionals and outdoor 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 Lake Mamie -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mf San Joaquin R Nr Mammoth Lakes Ca | 595 cfs | → |
| Deadman C A Big Springs Nr Crestview Ca | 37 cfs | → |
| Hot C A Flume Nr Mammoth Lakes Ca | 65 cfs | → |
| Merced R A Happy Isles Bridge Nr Yosemite Ca | 1,730 cfs | → |
| Nf Willow C Nr Sugar Pine Ca | 416 cfs | → |
| Big C Div Nr Fish Camp Ca | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Mamie.
⚓ Boat launches
- Gull Meadows Car Top Boat Launch
- Lake Edison Boating Site
- Navy Beach Paddle Boat Launch
- Florence Lake Boating Site
- Florence Lake Campground
- Mammoth Pool Rd, California
⛺ Campgrounds
More campgrounds →🎣 Fishing spots
More fishing →🛶 Paddle runs
- Rainbow Falls To National Monument Boundary
- Soda Springs Footbridge In Devils Postpile National Monument To Rainbow Falls
- Agnew Meadows To Soda Springs Footbridge
- National Monument Boundary To Soda Springs Footbridge In Devils Postpile National Monument
- Wilderness Boundary To La Dept. Of Water And Power Property
- Headwaters At Thousand Island Lake To Agnew Meadows
🛡 More reservoirs
More reservoirs →Track Lake Mamie 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 Lake Mamie
Where does the data for Lake Mamie 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 Significant 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 Lake Mamie.