Big Basin dam
Big Basin
Big Basin, also known as Sedimentation Pond Ta 244, is a federal-owned structure located in Pulaski, Missouri, near the city of Waynesville. Built in 1970 by the US Army, this Earth-type dam serves the primary purpose of debris control along the Roubidoux- Smith Branch Tr river. Standing at a height of 33 feet with a hydraulic height of 27 feet, Big Basin has a storage capacity of 357 acre-feet and covers a surface area of 17 acres.
Despite its low hazard potential, Big Basin has a moderate risk assessment rating of 3 due to its outdated condition assessment. The dam features an uncontrolled spillway and outlet gates, with a maximum discharge capacity not specified. While it has not been modified in recent years, it undergoes inspections every 4 years to ensure its integrity. With its location within the St. Louis District of the US Army, Big Basin serves as a vital resource for water management and climate resilience in the region.
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.
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Big Basin .
Boat launches
- Crossroads Access
- Dawn Road Laclede County
- Running River Drive Pulaski County
- Logan Road Pulaski County
Campgrounds
- Piney River Military - Fort Leonard Wood
- Roubidoux Springs
- Big Piney Equestrian Camp
- Big Piney Trail Primitive
- Slabtown Recreation Area
- Paddy Creek
Paddle runs
- Missouri State Highway 17 To Fort Leonard Wood (Army Base)
- Northern Boundary Of Fort Leonard Wood To North Section Line Of Sec 31, T36n, R10w
- County Highway O, Laclede, County, Missouri To Ozark Spring
- Western Edge Of Ozark National Scenic Riverways To Confluence With Alley Spring (Branch)
Track Big Basin 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 Big Basin
Where does the data for Big Basin 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 Big Basin .