Pomona No. 2 And No. 3 dam
Pomona No. 2 And No. 3
Pomona No. 2 and No. 3, located in Arvada, Colorado, are two earth dams designed by Frasier & Gingery, Inc. The dams were completed in 1972 and serve primarily for recreation purposes, while also providing flood risk reduction. With a dam height of 11 feet and a structural height of 34 feet, these dams have a storage capacity of 178 acre-feet and a normal storage of 114 acre-feet. The dams are situated on the Little Dry Creek-OS, within the jurisdiction of the Colorado Department of Water Resources.
These dams have a significant hazard potential and are currently rated in fair condition as of the last assessment in February 2020. The Emergency Action Plan (EAP) status is not specified, but the dams are inspected every two years to ensure their safety and functionality. In case of any emergencies, it is important for authorities to have updated emergency contacts and preparedness measures in place. The spillway type for these dams is uncontrolled, with a spillway width of 53 feet.
Overall, Pomona No. 2 and No. 3 are essential structures for both flood risk management and recreational activities in the area. Their moderate risk level and fair condition assessment highlight the importance of regular maintenance and monitoring to ensure the safety of the dams and surrounding communities. With their strategic location and purpose, these dams play a crucial role in water resource management and climate resilience efforts in Jefferson County, 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.
Nearby streamflow gauges
USGS streamgauges around Pomona No. 2 And No. 3 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Dry Creek At Westminster | 1 cfs | → |
| Big Dry Creek At Westminster | 1 cfs | → |
| Clear Creek At Mouth | 13 cfs | → |
| South Platte R At 64th Ave. Commerce City | 96 cfs | → |
| South Platte River At Denver | 105 cfs | → |
| Sand Crk Abv Burlington Ditch Nr Commerce City | 8 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pomona No. 2 And No. 3.
Boat launches
- Standley Lake Trail Westminster
- West 69th Avenue 4700, Westminster
- Ralston Creek Trail Arvada
- Fisherman's Trail Lakewood
- C-470 Trail Lakewood
- West Quincy Avenue Denver
Campgrounds
- Standley Lake
- Tipi Village
- Clear Creek Rv Park
- Bear Creek Lake Park
- Gennessee Ropes Camp Spot
- Camp Patiya
Fishing spots
Track Pomona No. 2 And No. 3 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 Pomona No. 2 And No. 3
Where does the data for Pomona No. 2 And No. 3 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 Pomona No. 2 And No. 3.