Lon Hagler dam
Lon Hagler
Lon Hagler is a privately owned dam located in Larimer County, Colorado, along the Big Thompson River. Constructed in 1967 by the USDA NRCS, this earth dam stands at a height of 60 feet and has a storage capacity of 6,275 acre-feet. The primary purpose of Lon Hagler is irrigation, but it also serves recreational purposes, covering a surface area of 201 acres.
Managed by the Colorado Department of Water Resources, Lon Hagler is regulated and inspected regularly to ensure its safety and compliance with state regulations. The dam has a high hazard potential and is classified as satisfactory in terms of condition assessment. Despite its age, Lon Hagler has undergone no significant modifications over the years, indicating its structural stability.
With a spillway width of 30 feet and a maximum discharge capacity of 920 cubic feet per second, Lon Hagler plays a crucial role in water resource management in the region. The dam's location in Loveland, Colorado, under the jurisdiction of the Omaha District, highlights its significance in providing irrigation water and recreational opportunities while ensuring public safety and environmental protection.
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 Lon Hagler -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Thompson River At Loveland | 73 cfs | → |
| Buckhorn Creek Near Masonville | 21 cfs | → |
| St. Vrain Creek At Lyons | 69 cfs | → |
| Cache La Poudre R Ab Boxelder C | 226 cfs | → |
| St. Vrain Creek At Mouth | 57 cfs | → |
| Cache La Poudre River At Fort Collins | 237 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lon Hagler.
Boat launches
- Boat Ramp Larimer County
- Lagerman Trail Boulder County
- Filter Plant River Access Point (Put-In)
- Bridges River Access Point (Put-In)
- Pineview River Access Point (Put-In, Take-Out)
- Bridges River Access Point (Take-Out)
Campgrounds
- Carter Lake - North Side Campgrounds
- North Pine Campground
- Flatiron Reservoir
- Carter Lake - South Side Campgrounds
- Boyd Lake State Park
- Pinewood Reservoir
Fishing spots
- Lon Hagler Reservoir
- Boedecker Reservoir
- Lonetree Reservoir
- Loveland Service Center Pond
- River`S Edge And Jayhawker Ponds
- Carter Lake
Paddle runs
More reservoirs
Track Lon Hagler 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 Lon Hagler
Where does the data for Lon Hagler 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 Lon Hagler.