South Fork Blackwater F-1 dam
South Fork Blackwater F-1
South Fork Blackwater F-1 is a dam located in Holden, Missouri, designed by the USDA NRCS and completed in 1980. This earth dam stands at a height of 48 feet and has a length of 780 feet, providing flood risk reduction for the surrounding area along the TR-Briar Creek. With a storage capacity of 165 acre-feet and a drainage area of 2714 square miles, the dam plays a crucial role in managing water resources in Johnson County.
The dam's spillway type is uncontrolled with a width of 95 feet, and it is equipped with valve outlet gates. Despite its significant hazard potential, the dam's condition assessment in 2007 deemed it satisfactory. The last inspection in 2015 indicated a regular inspection frequency of every three years. With its role in flood risk reduction and its location in an area prone to moderate risk, South Fork Blackwater F-1 serves as a vital infrastructure for water resource management and climate resilience in Missouri.
Overall, South Fork Blackwater F-1 is a key component of the local government's efforts to regulate and manage water resources in Johnson County. With its design by the USDA NRCS and its state-regulated status, the dam provides critical flood risk reduction for the area while also facing moderate risk factors that necessitate regular inspections and maintenance. As water resource and climate enthusiasts, understanding the infrastructure and function of dams like South Fork Blackwater F-1 is essential for appreciating the role they play in maintaining a sustainable and resilient environment.
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 South Fork Blackwater F-1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Creek Near Blairstown | 8,830 cfs | → |
| South Grand River At Urich | 9,460 cfs | → |
| South Grand River At Archie | 10,800 cfs | → |
| East Fork Little Blue River Nr Blue Springs | 10 cfs | → |
| Little Blue River Near Lake City | 1,290 cfs | → |
| Blue River At Blue Ridge Blvd Ext In Kc | 1,520 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near South Fork Blackwater F-1.
Boat launches
- Northwest 575th Road Johnson County
- Odessa Lake Road Lafayette County
- Lafayette County
- Mo K Henry County
- South Lake Road Cass County
Track South Fork Blackwater F-1 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 South Fork Blackwater F-1
Where does the data for South Fork Blackwater F-1 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 Significant 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 South Fork Blackwater F-1.