Allen Dam dam
Allen Dam
Allen Dam, located in Mercer, Missouri, serves as a vital structure for debris control along the TR-West Muddy Creek. Owned privately, this earth dam stands at a height of 25 feet and has a storage capacity of 27 acre-feet. Its primary purpose is debris control, with additional functions including fire protection and serving as a stock or small fish pond. With a low hazard potential and a current condition assessment of "Not Rated," Allen Dam plays a crucial role in managing water resources in the region.
Despite being privately owned and not regulated by the state, Allen Dam remains an important asset in the Rock Island District. The dam, with its buttress core type and unlisted/unknown foundation, contributes to the overall water management system in the area. While specifics such as the year of completion and last inspection date are not provided, the dam's presence ensures the protection of surrounding lands and communities from potential flooding and debris flow. For water resource and climate enthusiasts, Allen Dam represents a key element in the local ecosystem and serves as a reminder of the importance of sustainable water management practices.
As a structure with a primary focus on debris control, Allen Dam exemplifies the intersection of human engineering and environmental preservation. With a modest surface area of 2 acres and a drainage area of 20 acres, the dam contributes to the overall water balance in the region. While specific details such as spillway type and discharge capacity are not listed, the dam's low hazard potential and lack of state regulation indicate a relatively stable and well-maintained infrastructure. For those interested in water resource management and climate resilience, Allen Dam offers a case study in private ownership and community-based solutions for sustainable water infrastructure.
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 Allen Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Thompson River At Trenton | 692 cfs | → |
| East Fork Big Creek Near Bethany | 8 cfs | → |
| Medicine Creek Near Laredo | 92 cfs | → |
| Thompson River At Davis City | 120 cfs | → |
| Grand River Near Gallatin | 154 cfs | → |
| Locust Creek Near Linneus | 70 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Allen Dam.
Boat launches
Track Allen 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 Allen Dam
Where does the data for Allen 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 Allen Dam.