Graessle-Rockers Lake Dam dam
Graessle-Rockers Lake Dam
Located in Osage City, Missouri, the Graessle-Rockers Lake Dam stands as a recreational gem in the heart of Cole County. Built in 1967, this private Earth dam rises to a height of 31 feet, offering a maximum storage capacity of 249 acre-feet. With a primary purpose of recreation, the dam provides a serene escape for water resource and climate enthusiasts seeking solace in its 15-acre surface area.
Although not regulated by the state, the Graessle-Rockers Lake Dam boasts a high hazard potential, emphasizing the importance of proper maintenance and oversight. Despite its condition not being rated, the dam remains a key feature in the TR-OSAGE RIVER watershed, contributing to the drainage of a 290-acre area. As a site not under federal agency jurisdiction, the Graessle-Rockers Lake Dam serves as a testament to the importance of private ownership in preserving and managing our valuable water resources.
For those interested in exploring the intersection of water resource management and climate adaptation, the Graessle-Rockers Lake Dam offers a unique case study in recreational dam construction and maintenance. With its picturesque location and high hazard potential, this dam serves as a reminder of the need for proactive risk assessment and management in safeguarding our vital water infrastructure. As the Graessle-Rockers Lake Dam continues to provide a sanctuary for outdoor enthusiasts, it also serves as a reminder of the delicate balance between water conservation and recreational enjoyment in our changing climate.
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 Graessle-Rockers Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Moreau River Near Jefferson City | 6,210 cfs | → |
| Osage River Below St. Thomas | 37,200 cfs | → |
| Missouri River At Jefferson City | 102,000 cfs | → |
| Maries River At Westphalia | 363 cfs | → |
| Gasconade River Near Rich Fountain | 1,710 cfs | → |
| Osage River Near Bagnell | 35,300 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Graessle-Rockers Lake Dam.
Boat launches
- Old Ferry Road 10801, Cole County
- Jefferson City
- Us 50;Us 63 Osage County
- Scheuler Ferry Road West 698, Miller County
- Callaway County
- Osage County
Campgrounds
- Binder Park
- Rollins Ferry Access - Mdc
- Pine Ridge Recreation Area
- Pine Ridge Campground
- Pine Ridge
- Dry Fork Recreation Area
Track Graessle-Rockers 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 Graessle-Rockers Lake Dam
Where does the data for Graessle-Rockers 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 Graessle-Rockers Lake Dam.