Island Lake dam
Island Lake
Island Lake, also known as Reservoir #15, is a privately owned reservoir located in Cedaredge, Delta County, Colorado. Built in 1954, this irrigation reservoir serves multiple purposes including irrigation and recreation, with a primary dam type of Earth construction. With a dam height of 18 feet and a storage capacity of 2355 acre-feet, Island Lake covers a surface area of 161 acres and has a drainage area of 2 square miles.
The reservoir has a significant hazard potential and is classified as fair in condition assessment, with the last inspection conducted in June 2020. It has uncontrolled spillways, slide and sluice gate outlet gates, and a maximum discharge capacity of 600 cubic feet per second. Despite its moderate risk assessment rating, the reservoir remains a vital water resource in the area, supporting agricultural activities and providing recreational opportunities for local residents and visitors alike.
Managed by the Colorado Division of Water Resources, Island Lake plays a crucial role in water management and conservation efforts in the region. With its picturesque location and essential functions, this reservoir serves as a valuable asset for water resource and climate enthusiasts interested in the sustainability and resilience of water systems in Colorado.
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.
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Island Lake.
⚓ Boat launches
- Z Road Delta County
- State Highway 65 25261, Delta County
- Ward Lake Boat Access - Grand Valley Rd
- Lakeshore Drive Delta County
- Sunset Boat Access- Grand Valley Rd
- Forest Road 125 Delta County
⛺ Campgrounds
- Little Bear Campground - Grand Valley Rd
- Island Lake Campground - Grand Valley Rd
- Island Lake
- Cobbett Campground - Grand Valley Rd
- Carp Lake
- Ward Lake
🎣 Fishing spots
- Island Lake (Grand Mesa)
- Little Gem Reservoir
- Deep Slough Reservoir
- Cobbett (Carp) Lake
- Ward Creek Reservoir
- Ward Lake
🛶 Paddle runs
- Gunnison River Segment 2
- West Fork Terror Creek
- Roubideau Creek Segment 2
- The Painted Wall To The Black Canyon Gunnison National Monument-Gunnison Gorge Wilderness Boundary
- Roubideau Creek Segment 1
- Potter Creek
🛡 More reservoirs
More reservoirs →Track Island Lake 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 Island Lake
Where does the data for Island Lake 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 Significant 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 Island Lake.