Rehmer dam
Rehmer
Rehmer, also known as Arrowhead, is a privately owned irrigation dam located in La Salle, Weld County, Colorado. Completed in 1957, this earth dam stands at a height of 23 feet and has a structural height of 28 feet, with a length of 313 feet. The dam serves the primary purpose of irrigation, with a storage capacity of 45 acre-feet and a maximum discharge of 788 cubic feet per second.
Situated on the Big Thompson River, Rehmer is regulated by the Colorado Division of Water Resources and is subject to state permitting, inspection, and enforcement. Despite being classified as having a low hazard potential, the dam is rated as satisfactory in condition assessment and has a moderate risk level. The spillway type is uncontrolled, with a width of 45 feet, and the dam has a surface area of 5 acres. The last inspection was conducted in January 2017, with an inspection frequency of every 6 years.
Overall, Rehmer serves as a vital component of the irrigation infrastructure in the region, providing water resources for agricultural purposes. With its strategic location on the Big Thompson River, this dam plays a crucial role in water management and conservation efforts in Weld County, Colorado. The satisfactory condition assessment and moderate risk level reflect the ongoing maintenance and monitoring efforts to ensure the safety and functionality of the structure for the surrounding area.
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 Rehmer -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Thompson River At Mouth | 74 cfs | → |
| Cache La Poudre River Near Greeley | 55 cfs | → |
| St. Vrain Creek At Mouth | 181 cfs | → |
| South Platte River Near Kersey | 362 cfs | → |
| Big Thompson River At Loveland | 120 cfs | → |
| South Platte River At Fort Lupton | 201 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Rehmer.
Boat launches
Campgrounds
- Missile Site Park
- Boyd Lake State Park
- St. Vrain State Park
- Union Reservoir
- South Bay - Horsetooth Reservoir
- Carter Lake - South Side Campgrounds
Fishing spots
Paddle runs
More reservoirs
Track Rehmer 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 Rehmer
Where does the data for Rehmer 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 Rehmer.