Heimos Lake Dam dam
Heimos Lake Dam
Heimos Lake Dam, also known as Pierce Lake Dam, is a privately owned structure located in Richwoods, Missouri. Completed in 1955, this rockfill dam stands at a height of 37 feet and has a length of 1350 feet, creating a reservoir with a storage capacity of 610 acre-feet. The primary purposes of this dam are fire protection, stock, and small fish pond management, serving as a vital resource for the local community.
With a high hazard potential and a satisfactory condition assessment, Heimos Lake Dam is regulated and inspected by the Dam and Reservoir Safety Program in Missouri. The dam poses a moderate risk, and emergency action plans are in place to ensure the safety of surrounding areas in the event of a breach or failure. The dam's spillway, with a width of 60 feet, helps to control water flow and prevent overflow during periods of heavy rainfall.
Water resource and climate enthusiasts will find Heimos Lake Dam to be an intriguing structure that plays a crucial role in maintaining water resources in the Washington County area. Its construction and management reflect the importance of proper dam regulation and inspection to ensure public safety and protect the surrounding environment. With its unique design and history, Heimos Lake Dam stands as a testament to the intersection of human engineering and natural resource management.
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 Heimos Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big River Near Richwoods | 346 cfs | → |
| Meramec River Near Sullivan | 574 cfs | → |
| Big River At Byrnesville | 361 cfs | → |
| Meramec River At Pacific | 1,300 cfs | → |
| Bourbeuse River At Union | 353 cfs | → |
| Big River At Irondale | 44 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Heimos Lake Dam.
Boat launches
- Meramec State Park Franklin County
- Highway W Franklin County
- Stierberger Court Union
- Highway Uu Franklin County
- Crawford County
- Choctaw Drive St. Francois County
Campgrounds
- Washington State Park
- Backpack Camp 8
- Meramec State Park
- Backpack Camp 1
- Backpack Camp 2
- Brazil Creek Trailhead
Fishing spots
Track Heimos 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 Heimos Lake Dam
Where does the data for Heimos 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 Heimos Lake Dam.