Nimmo No. 8 dam
Nimmo No. 8
Nimmo No. 8 is a privately owned earth dam located in Laramie, Wyoming, along the Lost Corner Creek. Built in 1942 for the primary purpose of water supply, this dam stands at a height of 26 feet and has a length of 620 feet, with a storage capacity of 71 acre-feet. Despite its low hazard potential, the dam's condition assessment is rated as poor, highlighting the need for maintenance and potential improvements to ensure its long-term stability and safety.
The dam features an uncontrolled spillway with a width of 20 feet and has undergone inspection every 5 years, with the last assessment conducted in September 2018. With a moderate risk rating of 3, there is a need for continued risk management measures to address any potential vulnerabilities and ensure the dam's resilience in the face of changing climate conditions. Additionally, the dam's location in a rural area means that emergency preparedness and communication plans may need to be updated to meet current guidelines and ensure the safety of surrounding communities in the event of a dam failure.
As water resources and climate enthusiasts, it is important to monitor dams like Nimmo No. 8 to understand how they are impacted by environmental changes and to advocate for sustainable management practices that prioritize safety and resilience. By staying informed about the condition of dams and the potential risks they pose, we can work towards safeguarding our water resources for future generations and mitigating the impacts of a changing climate on these critical infrastructure assets.
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 Nimmo No. 8 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Crow Creek At 19th Street | 3 cfs | → |
| Sybille Creek Ab Mule Creek | 143 cfs | → |
| Sybille Creek Ab Canal No. 3 | 93 cfs | → |
| Laramie River At Laramie | 15 cfs | → |
| Laramie River Near Bosler | 1,950 cfs | → |
| N Frk Cache La Poudre R Blw Halligan Res Nr V Dal | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Nimmo No. 8.
Campgrounds
- F.E. Warren Afb Crow Creek Military
- Curt Gowdy State Park
- Yellow Pine
- Yellow Pine Campground
- Pole Creek Dispersed Campground
- Tie City
Fishing spots
- Lower North Crow Reservoir
- Lake Absarraca
- Sloans Lake
- Upper North Crow Reservoir
- Granite Springs Reservoir
- Leazenby Lake
Paddle runs
- Co Dow Anlger Access Trail To Nf Boundary On East Section Line, Sec 24, T11n, R72w
- Duck Creek
- Intermittent Stream To Junction With Co Division Of Wildlife Angler Access Trail In Sw 1/4 Sec 22, T11n, R72w
- Upper North Fork
- Road West Of Creedmore Lakes To Junction Of Intermittent Stream In Sw 1/4, Sec 29, T11n, R72w
Track Nimmo No. 8 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 Nimmo No. 8
Where does the data for Nimmo No. 8 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 Nimmo No. 8.