Pomona Lake No. 1 dam
Pomona Lake No. 1
Pomona Lake No. 1, located in Jefferson County, Colorado, is a privately owned earth dam completed in 1902 for the primary purpose of flood risk reduction. This dam plays a crucial role in protecting the surrounding areas from potential flooding events, with a height of 6 feet and a hydraulic height of 9 feet. With a storage capacity of 255 acre-feet, Pomona Lake No. 1 also offers recreational opportunities for visitors, making it a versatile and valuable asset to the community.
Although the dam has a low hazard potential and is deemed to be in satisfactory condition as of its last assessment in 2009, regular inspections are conducted every 6 years to ensure its continued safety and functionality. The spillway type is uncontrolled, with a width of 23 feet, and the maximum discharge capacity is 210 cubic feet per second. Despite its age, Pomona Lake No. 1 remains a reliable structure that effectively manages water resources in the region while providing a recreational space for residents to enjoy.
Managed by the Colorado State Regulatory Agency and located on Little Dry Creek-OS, Pomona Lake No. 1 is an essential part of the local water infrastructure. With its moderate risk assessment rating and a history dating back over a century, this dam stands as a testament to the importance of effective water resource management and climate resilience in the face of changing environmental conditions.
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 Lake No. 1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Dry Creek At Westminster | 3 cfs | → |
| Big Dry Creek At Westminster | 8 cfs | → |
| Clear Creek At Mouth | 30 cfs | → |
| South Platte R At 64th Ave. Commerce City | 210 cfs | → |
| South Platte River At Denver | 189 cfs | → |
| Sand Crk Abv Burlington Ditch Nr Commerce City | 73 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Pomona Lake No. 1.
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 Lake No. 1 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 Lake No. 1
Where does the data for Pomona Lake No. 1 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 Pomona Lake No. 1.