Pettegrew Dam dam
Pettegrew Dam
Pettegrew Dam, located in Fall River, South Dakota, is a privately owned structure that serves as a vital resource for water management in the area. Built in 1910, this earth dam stands at a height of 10 feet and has a length of 750 feet, with a storage capacity of 140 acre-feet. Situated on the tributary of Horsehead Creek, the dam plays a crucial role in regulating water flow and ensuring sustainable water supply for the region.
Despite being classified as having a low hazard potential, Pettegrew Dam is subject to state regulation and inspection, with the South Dakota Department of Environment and Natural Resources (DENR) overseeing its permitting, inspection, and enforcement processes. This level of oversight ensures that the dam continues to meet safety standards and operate effectively. Additionally, the dam falls under the jurisdiction of the Omaha District of the US Army Corps of Engineers, highlighting its significance in the overall water resource management system in the region.
With its historical significance and continued relevance in water management, Pettegrew Dam stands as a testament to the importance of sustainable water infrastructure. As climate change impacts water resources worldwide, structures like Pettegrew Dam play a crucial role in adapting to changing conditions and ensuring the resilience of water supply systems. Through ongoing monitoring, maintenance, and regulation, Pettegrew Dam remains a key asset in safeguarding water resources for future generations.
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 Pettegrew Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Horsehead Cr At Oelrichs Sd | · | → |
| Hat Cr Near Edgemont Sd | 0 cfs | → |
| Cheyenne R Below Angostura Dam Sd | 1 cfs | → |
| White R Nr Ne-Sd State Line | 7 cfs | → |
| Fall R At Hot Springs Sd | 35 cfs | → |
| White R Near Oglala Sd | 101 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pettegrew Dam.
Boat launches
- Whitney Lake
- County Highway 6d Fall River County
- Fall River County
- Sheps Canyon Road Fall River County
- South Boat Ramp Road Fall River County
Campgrounds
- Toadstool
- Toadstool Geological Park And Campground
- Angostura State Rec Area
- Crawford City Park
- Roberts Tract Campground
- Soldier Creek
Paddle runs
Track Pettegrew 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 Pettegrew Dam
Where does the data for Pettegrew 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 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 Pettegrew Dam.