East Side Detention Facility
East Side Detention Facility is an earth dam located in Larimer County, Colorado, built in 2016. It carries a High hazard potential classification and has a satisfactory condition assessment.
About East Side Detention Facility
The primary purpose of East Side Detention Facility is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Boxelder Basin Regional Stormwater Authority (local government). It impounds the Boxelder Creek near Timnath.
The dam stands 26 feet tall and stretches 7,700 feet across, creates a reservoir covering 118 acres, has a maximum storage capacity of 1,836 acre-feet, and collects water from a drainage area of 252 square miles. Completed in 2016, the structure is relatively new.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 08/02/2022.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Colorado dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Colorado |
| County | Larimer |
| Nearest City | Timnath |
| River/Stream | Boxelder Creek |
| Coordinates | 40.61049, -104.98891 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 7,700 ft |
| Year Completed | 2016 (10 years old) |
Storage & Hydraulics
| NID Storage | 1,836 acre-ft |
| Max Storage | 1,836 acre-ft |
| Normal Storage | 1,166 acre-ft |
| Surface Area | 118 acres |
| Drainage Area | 252 sq mi |
| Max Discharge | 25,300 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | BOXELDER BASIN REGIONAL STORMWATER AUTHORITY |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/02/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO02979 |
| Federal ID | CO02979 |
| More Info | State Dam Safety Program |