Kostyshock Lake Dam dam
Kostyshock Lake Dam
Kostyshock Lake Dam, located in Jefferson, Missouri, is a private dam primarily designed for recreation. Built in 1948, this earth dam stands at 38 feet high and spans 625 feet in length, with a storage capacity of 272 acre-feet. The dam is regulated by the state of Missouri and is subject to regular inspections to ensure its safety and functionality.
The dam poses a high hazard potential, but its condition assessment as of October 2015 was deemed satisfactory. It has an uncontrolled spillway with a width of 19 feet and utilizes valve outlet gates. With a drainage area of 180 square miles and a maximum discharge of 390 cubic feet per second, Kostyshock Lake Dam plays a crucial role in managing water resources in the region.
Despite its moderate risk assessment, the dam continues to provide essential recreational opportunities for locals and visitors. With its picturesque location near the TR to Big River and its surface area of 11 acres, Kostyshock Lake Dam remains a popular spot for water resource and climate enthusiasts to enjoy the outdoors while appreciating the engineering marvel that is this vital structure.
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 Kostyshock Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big River Near Richwoods | 346 cfs | → |
| Big River Below Desloge | 80 cfs | → |
| Big River At Irondale | 44 cfs | → |
| Big River At Byrnesville | 361 cfs | → |
| Meramec River At Pacific | 1,300 cfs | → |
| Meramec River Near Sullivan | 574 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Kostyshock Lake Dam.
Boat launches
- Choctaw Drive St. Francois County
- Williamson Road Oakville
- Bismarch Lake Road St. Francois County
- Ellis Grove Parkway Jefferson County
- Meramec State Park Franklin County
- Highway W Franklin County
Campgrounds
- Washington State Park
- St. Francois State Park
- St. Joe State Park
- Brazil Creek Trailhead
- Robertsville State Park
- Backpack Camp 8
Fishing spots
Track Kostyshock 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 Kostyshock Lake Dam
Where does the data for Kostyshock 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 Kostyshock Lake Dam.