Lake Gemay Dam dam
Lake Gemay Dam
Lake Gemay Dam, located in Alley Spring, Missouri, serves as a vital flood risk reduction structure along the TR-North Prong Jack Fork River. Built in 1964, this private earth dam stands at a height of 27 feet and has a length of 470 feet, providing a storage capacity of 53 acre-feet. While primarily designed for flood risk reduction, it also offers recreational opportunities for enthusiasts in the area.
With a low hazard potential and a moderate risk assessment rating, Lake Gemay Dam ensures the safety of the surrounding Texas County community. Despite not being state-regulated, the dam's condition is currently not rated, indicating the need for further assessment. Additionally, the dam features an uncontrolled spillway with a width of 20 feet and no outlet gates, emphasizing its reliance on natural drainage mechanisms. As a significant structure within the Little Rock District, Lake Gemay Dam plays a crucial role in managing water resources in the region.
Overall, Lake Gemay Dam stands as a testament to the importance of effective flood risk reduction measures in mitigating potential hazards and ensuring community safety. As a key infrastructure project in Missouri, it highlights the intersection of water resource management and climate resilience. Moreover, its strategic location and design underscore the crucial role that private entities play in safeguarding against natural disasters and promoting sustainable water management practices in the region.
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 Gemay Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Jacks Fork Near Mountain View | 69 cfs | → |
| Jacks Fork At Alley Spring | 109 cfs | → |
| Current River Above Akers | 325 cfs | → |
| Jacks Fork At Eminence | 268 cfs | → |
| Roubidoux Creek Above Ft. Leonard Wood | 32 cfs | → |
| Big Piney River Near Big Piney | 268 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Gemay Dam.
Boat launches
- State Highway 17 Texas County
- State Highway 106 Shannon County
- State Highway B Shannon County
- Mason Road Texas County
- State Highway 14 Douglas County
- Lake Drive Texas County
Campgrounds
- Blue Spring
- Rymer Spring
- Bay Creek
- Sycamore Loop Dispersed - Noblett Lake
- Alley Spring - Ozark National Scenic River
- Akers
Paddle runs
- Western Edge Of Ozark National Scenic Riverways To Confluence With Alley Spring (Branch)
- Confluence With Alley Spring (Branch) To Confluence With Current River (Does Not Include River Segment In Gap Between Parkland Units)
- Hebron Access Site To Southern Forest Boundary In Sec 33, T24n, R11w
- Missouri State Highway 17 To Fort Leonard Wood (Army Base)
- Northern Boundary Of Fort Leonard Wood To North Section Line Of Sec 31, T36n, R10w
- The Most Upstream Portion Of Ozark National Scenic Riverways To The Most Downstream Portion Of Ozark National Scenic Riverways
Track Lake Gemay Dam 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 Gemay Dam
Where does the data for Lake Gemay Dam 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 Lake Gemay Dam.