Harriman dam
Harriman
Located in Jefferson County, Colorado, the Harriman Dam is a public utility structure designed by Craig Ullmann with a primary purpose of irrigation. Completed in 2013, this earth dam stands at a height of 15 feet and has a hydraulic height of 15 feet, providing a maximum storage capacity of 963 acre-feet. With a normal storage capacity of 762 acre-feet and a surface area of 65 acres, the dam serves the vital functions of irrigation and water supply in the region.
Managed by the Colorado Department of Water Resources, the Harriman Dam is regulated, permitted, inspected, and enforced by state agencies to ensure its safety and functionality. With a high hazard potential and satisfactory condition assessment as of July 2020, the dam poses a moderate risk and is subject to regular inspections and risk management measures. In case of emergencies, an emergency action plan is in place, with the last revision made in December 2018, to meet guidelines and ensure preparedness.
Situated along Weaver Creek-OS in Lakewood, the Harriman Dam features an uncontrolled spillway with a width of 69 feet, capable of discharging up to 736 cubic feet per second. As a crucial water resource infrastructure in the area, the dam plays a significant role in supporting agricultural activities and water supply needs, highlighting its importance in the context of water resource management and climate resilience efforts.
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 Harriman -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Bear Creek Above Bear Creek Lake Near Morrison | 4 cfs | → |
| Bear Creek At Morrison | 15 cfs | → |
| Bear Creek At Mouth | 15 cfs | → |
| South Platte River Below Union Ave | 15 cfs | → |
| South Platte River At Englewood | 24 cfs | → |
| Harvard Gulch At Harvard Park | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Harriman.
Boat launches
- Fisherman's Trail Lakewood
- C-470 Trail Lakewood
- West Quincy Avenue Denver
- Chatfield Lake North Boat Ramp
- Fairway Drive Evergreen
- West 69th Avenue 4700, Westminster
Campgrounds
- Bear Creek Lake Park
- Chatfield State Park
- Clear Creek Rv Park
- Gennessee Ropes Camp Spot
- Idylease Campground
- Chief Ouray Group Site
Fishing spots
- Harriman Lake
- Blue Heron Lake
- Hine Lake
- Bear Creek Ponds
- Soda Lakes
- Cottonwood Park Lake (Kipling & Jewell)
Track Harriman 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 Harriman
Where does the data for Harriman 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 Harriman.