Leyden dam
Leyden
Located in Jefferson County, Colorado, the Leyden Dam, also known as Farmers Highline No 3, was completed in 1902 for the primary purpose of flood risk reduction along Leyden Creek. This earth dam stands at a height of 37 feet and has a structural height of 47 feet, with a length of 1,545 feet and a storage capacity of 1,300 acre-feet. The dam is regulated by the Colorado Department of Water Resources and is subject to state permitting, inspection, and enforcement to ensure its safety and effectiveness in flood control.
With a hazard potential rated as high, the Leyden Dam has been assessed as satisfactory in its condition as of the last inspection in February 2020. The dam's risk assessment is moderate, indicating a level 3 risk, and it falls under the jurisdiction of the Omaha District of the US Army Corps of Engineers. In case of emergencies, there is a need for an Emergency Action Plan (EAP) to be prepared and regularly reviewed. Overall, Leyden Dam serves not only as a flood risk reduction measure but also provides recreational opportunities for the community in Arvada while being a critical component of water resource management in the region.
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 Leyden -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Coal Creek Near Plainview | 4 cfs | → |
| Clear Creek At Golden | 106 cfs | → |
| Little Dry Creek At Westminster | 2 cfs | → |
| Big Dry Creek At Westminster | 1 cfs | → |
| South Platte River At Denver | 140 cfs | → |
| Cherry Creek At Denver | 60 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Leyden.
Boat launches
- Ralston Creek Trail Arvada
- Standley Lake Trail Westminster
- West 69th Avenue 4700, Westminster
- Miramonte Road Boulder County
- Fisherman's Trail Lakewood
- C-470 Trail Lakewood
Campgrounds
- Tipi Village
- Standley Lake
- Clear Creek Rv Park
- Gennessee Ropes Camp Spot
- Rifleman Phillips Group Campground
- Camp Patiya
Fishing spots
Track Leyden 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 Leyden
Where does the data for Leyden 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 Leyden.