Grizzly Gulch Tailings Dam dam
Grizzly Gulch Tailings Dam
Grizzly Gulch Tailings Dam in South Dakota, completed in 1998, stands as a significant earth dam with a height of 380 feet and a length of 2000 feet. Owned privately, this dam on the Grizzly Gulch river is regulated by the state agency DANR and is subject to regular inspections, enforcement, and permitting. The dam has a storage capacity of 20,200 acre-feet and is crucial for water resource management in the area.
With a hazard potential rated as high, the dam's condition assessment in 2017 was deemed satisfactory. Despite its remote location near Pluma, Lawrence County, the dam poses a vital role in flood control and water storage for the region. The dam's emergency action plan status and risk assessment details were not provided, leaving room for further scrutiny and preparedness in case of any potential emergencies.
As a key structure in the area's water management infrastructure, Grizzly Gulch Tailings Dam requires ongoing monitoring and maintenance to ensure its continued safe operation. Its height, storage capacity, and critical location make it a crucial component in safeguarding against potential risks and ensuring water resource sustainability in the region. Climate and water resource enthusiasts will find this dam's data and regulatory oversight of interest as an example of earth dam management in a rural setting.
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 Grizzly Gulch Tailings Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Deadwood Creek At Central City | 1 cfs | → |
| Bear Butte Creek Near Deadwood | 1 cfs | → |
| Spearfish Creek Near Lead | 27 cfs | → |
| Elk Cr Near Roubaix Sd | 7 cfs | → |
| Annie Creek Near Lead | 0 cfs | → |
| Whitewood Cr Above Whitewood | 9 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grizzly Gulch Tailings Dam.
⚓ Boat launches
- Jenney Gulch Picnic Area Fishing Access
- Fsr 450 Pennington County
- Deerfield Cove Road Pennington County
- Pennington County
- Fishing Access Road Butte County
- Sheridan Lake Road 16451, Rapid City
⛺ Campgrounds
- Strawberry Picnic & Tent Camping Area
- Hanna
- Hanna Campground
- Roubaix Lake Campground
- Roubaix Lake
- Chris' Campground
🎣 Fishing spots
- Yates Pond
- Veterans Point Fishing Pier
- Rapid Creek Trailhead & Fishing Access
- Deerfield Reservoir Complex
- Sheridan Lake Complex
- Horsethief Lake Day Use Site
🛡 More reservoirs
More reservoirs →Track Grizzly Gulch Tailings 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 Grizzly Gulch Tailings Dam
Where does the data for Grizzly Gulch Tailings 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 Grizzly Gulch Tailings Dam.