Pettegrew Pond No.1 dam
Pettegrew Pond No.1
Located in Fall River, South Dakota, Pettegrew Pond No.1 is a privately owned earth dam that was completed in 1968 by the Natural Resources Conservation Service. This dam, with a height of 17 feet and a length of 850 feet, serves as a crucial water resource along the TR-Cheyenne river system, providing a maximum storage capacity of 114 acre-feet.
With a low hazard potential and a current condition assessment of "Not Rated," Pettegrew Pond No.1 stands as a reliable structure for water management in the region. The dam is regulated by the South Dakota Department of Environment and Natural Resources, with state permitting, inspection, and enforcement in place to ensure its safety and functionality. Despite its age, the dam continues to play a vital role in flood control and water storage, contributing to the overall resilience of the local ecosystem.
As an enthusiast of water resources and climate, Pettegrew Pond No.1 offers a fascinating case study of a well-maintained earth dam in a scenic South Dakota landscape. Its association with the TR-Cheyenne river system and low hazard potential make it a notable feature for those interested in water infrastructure and conservation efforts. With its history of construction by the NRCS and state regulation by DENR, this dam exemplifies the importance of effective management and maintenance practices for sustainable water resource utilization in the face of changing climate conditions.
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 Pond No.1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Horsehead Cr At Oelrichs Sd | · | → |
| White R Nr Ne-Sd State Line | 7 cfs | → |
| Hat Cr Near Edgemont Sd | 0 cfs | → |
| Cheyenne R Below Angostura Dam Sd | 1 cfs | → |
| White R Near Oglala Sd | 101 cfs | → |
| Fall R At Hot Springs Sd | 37 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pettegrew Pond No.1.
Boat launches
- Whitney Lake
- Fall River County
- County Highway 6d Fall River County
- Sheps Canyon Road Fall River County
- South Boat Ramp Road Fall River County
Campgrounds
- Angostura State Rec Area
- Toadstool
- Toadstool Geological Park And Campground
- Roberts Tract Campground
- Chadron State Park
- Crawford City Park
Paddle runs
Track Pettegrew Pond No.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 Pettegrew Pond No.1
Where does the data for Pettegrew Pond No.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 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 Pond No.1.