Pinnacle Lake Dam dam
Pinnacle Lake Dam
Pinnacle Lake Dam, located in Montgomery County, Missouri, stands as a private-owned structure with a primary purpose of recreation. Completed in 1965, this Earth-type dam spans 800 feet in length and reaches a height of 49 feet, holding a storage capacity of 2,607 acre-feet. Situated on Pinnacle Creek, the dam serves as a crucial water resource for the region, with a drainage area of 4,495 acres and a maximum discharge rate of 22,069 cubic feet per second.
Despite its satisfactory condition assessment, Pinnacle Lake Dam has been classified with a high hazard potential, signaling the critical importance of its maintenance and regulation. The dam is subject to state jurisdiction, regulation, permitting, inspection, and enforcement by the Dam and Reservoir Safety Program in Missouri. With a risk assessment rating of moderate and a two-year inspection frequency, efforts are in place to ensure the safety and reliability of this vital water infrastructure.
Water resource and climate enthusiasts will be intrigued by the role of Pinnacle Lake Dam in balancing recreation and water management in the region. As a significant feature on the landscape, the dam not only provides leisure opportunities but also underscores the need for diligent risk management and emergency preparedness. With a rich history dating back to the 1960s, Pinnacle Lake Dam continues to play a crucial role in the local water supply and ecosystem, highlighting the intersection of human infrastructure and environmental stewardship.
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 Pinnacle Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Missouri River At Hermann | 133,000 cfs | → |
| Cuivre River Near Troy | 1,170 cfs | → |
| Bourbeuse River At Union | 329 cfs | → |
| Gasconade River Near Rich Fountain | 1,710 cfs | → |
| Dardenne Creek At Ofallon | 185 cfs | → |
| Maries River At Westphalia | 363 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pinnacle Lake Dam.
Boat launches
- Wharf Street 200, Hermann
- Loutre River Trail Montgomery County
- Gasconade
- Katy Trail Warren County
- Callaway County
- Audrain County
Track Pinnacle 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 Pinnacle Lake Dam
Where does the data for Pinnacle 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 Pinnacle Lake Dam.