Site 75a dam
Site 75a
Site 75a is a local government-owned dam located in Pottawatomie, Kansas, designed by King Engineering and completed in 2004 for the primary purpose of flood risk reduction along the Rock Creek-TR river or stream. This Earth-type dam stands at a height of 33 feet and spans a length of 650 feet, with a storage capacity of 295 acre-feet and a normal storage level of 26.9 acre-feet. Despite its low hazard potential, the dam has a moderate risk assessment rating of 3 due to its location and potential impact on surrounding areas.
Managed by the Kansas Department of Agriculture, Site 75a is regulated, permitted, inspected, and enforced by the state, ensuring its compliance with safety standards and guidelines. Although the dam's condition assessment is currently not rated, it has not undergone any modifications since its completion. With a spillway width of 80 feet and a maximum discharge capacity of 2240 cubic feet per second, Site 75a serves as a crucial infrastructure for mitigating flood risks in the region while also providing valuable data for water resource and climate enthusiasts interested in monitoring and managing the local watershed.
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 Site 75a -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Rock C Nr Louisville | 16 cfs | → |
| Vermillion C Nr Wamego | 132 cfs | → |
| Big Blue R Nr Manhattan | 803 cfs | → |
| Kansas R At Wamego | 5,190 cfs | → |
| Kansas R Nr Belvue | 5,900 cfs | → |
| Kings C Nr Manhattan | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Site 75a.
Boat launches
- State Lake Road 7988, Pottawatomie County
- Lincoln Avenue St. George
- Spillway Marina Road Pottawatomie County
- Riley County
- Park Road Pottawatomie County
- Linear Trail Pottawatomie County
Campgrounds
- Oregon Trail Rv Park
- Tuttle Creek State Park
- Tuttle Creek Cove - Tuttle Creek Lake
- Stockdale - Tuttle Creek Reservoir
- St Marys Riverside Park
- Blue Rapids/Riverside City Park
Fishing spots
Track Site 75a 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 Site 75a
Where does the data for Site 75a 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 Site 75a.