Lost Valley Lake Dam dam
Lost Valley Lake Dam
Lost Valley Lake Dam, located in Gasconade County, Missouri, is a private recreational structure completed in 1974. With a height of 30 feet and a storage capacity of 626 acre-feet, this Earth dam sits on the TR-BIG BRCH-BOEUF CREEK and serves primarily for recreational purposes. The dam is owned by a private entity and is not regulated or inspected by the state, posing a high hazard potential due to its condition being not rated.
The dam's location in Washington, Missouri, offers a serene setting for water resource and climate enthusiasts to explore. With a surface area of 39 acres and a drainage area of 1300 square miles, Lost Valley Lake Dam provides a picturesque backdrop for outdoor activities. While the dam's risk assessment and management measures are not specified, its high hazard potential underscores the importance of emergency preparedness and safety protocols for visitors and nearby residents.
Despite lacking state regulation and inspection, Lost Valley Lake Dam remains a popular destination for recreation in the St. Louis District. As water enthusiasts enjoy the tranquil surroundings and recreational opportunities, it is crucial for all stakeholders to prioritize safety and risk mitigation strategies to ensure the long-term integrity and functionality of this Earth dam.
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 Lost Valley Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Missouri River At Hermann | 121,000 cfs | → |
| Bourbeuse River At Union | 353 cfs | → |
| Gasconade River Near Rich Fountain | 2,320 cfs | → |
| Bourbeuse River Near High Gate | 178 cfs | → |
| Meramec River Near Sullivan | 574 cfs | → |
| Maries River At Westphalia | 1,000 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lost Valley Lake Dam.
Track Lost Valley Lake 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 Lost Valley Lake Dam
Where does the data for Lost Valley Lake 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 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 Lost Valley Lake Dam.