Colletti No. 2 dam
Colletti No. 2
Colletti No. 2 is a private irrigation dam located in Kemmerer, Wyoming, along a branch of Willow Creek. Built in 1927, this earth dam stands at a height of 26 feet with a hydraulic height of 21 feet and a length of 536 feet. The dam serves multiple purposes, including irrigation, fire protection, stock, and small fish pond management, with a storage capacity of 76 acre-feet.
Despite its historical significance, Colletti No. 2 is currently in poor condition, posing a low hazard potential but with moderate risk due to its age and maintenance issues. The last inspection in September 2018 revealed its deteriorating state, prompting concerns about its structural integrity. With only one valve outlet gate and an uncontrolled spillway, there are limited measures in place for managing potential emergencies or disasters.
As climate change continues to impact water resources and infrastructure, the conservation and maintenance of dams like Colletti No. 2 are crucial for ensuring the safety and sustainability of water supplies in the region. With proper monitoring and risk assessment, efforts can be made to address the dam's poor condition and mitigate potential hazards, ultimately safeguarding the surrounding community and environment.
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 Colletti No. 2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Fontenelle C Nr Herschler Ranch | 104 cfs | → |
| Hams Fork Below Pole Creek | 161 cfs | → |
| Green River Below Fontenelle Reservoir | 769 cfs | → |
| Bear River Below Pixley Dam | 1 cfs | → |
| Green River Near La Barge | 2,000 cfs | → |
| Bear River Below Smiths Fork | 326 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Colletti No. 2.
Boat launches
- Fontenelle Creek Boat Ramp
- Names Hill Boat Launch
- Tail Race Campground Boat Launch
- Slate Creek Campground Boat Launch
- Weeping Rock Campground Boat Launch
Campgrounds
- Kemmerer Tent Park
- Fontenelle Creek Campsite 40
- Fontenelle Creek Campsite 41
- Fontenelle Creek Campsite 38
- Fontenelle Creek Campsite 36
- Fontenelle Creek Campsite 39
Paddle runs
- Source To Nf Boundary
- Raymond Creek
- Huff Creek
- Salt River Trailhead To Nf Boundary
- Source To Salt River Trailhead
- Source To Kinney Creek Confluence
More reservoirs
Track Colletti No. 2 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 Colletti No. 2
Where does the data for Colletti No. 2 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 Colletti No. 2.