Crow Lane No. 1
Crow Lane No. 1 is an earth dam located in Larimer County, Colorado, built in 2008. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Crow Lane No. 1
The primary purpose of Crow Lane No. 1 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Pinewood Springs Water District (longworth, Bobby) (public utility). It impounds the Unamed Trib Lt Thompson-os near Lyons.
The dam stands 74 feet tall and stretches 330 feet across, creates a reservoir covering 4 acres, and has a maximum storage capacity of 52 acre-feet. Completed in 2008, 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 08/12/2022.
At 74 feet, this dam is taller than 97% of all dams in the United States.
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 | Lyons |
| River/Stream | Unamed Trib Lt Thompson-os |
| Coordinates | 40.27668, -105.35823 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 74 ft |
| Dam Height | 40 ft |
| Dam Length | 330 ft |
| Year Completed | 2008 (18 years old) |
Storage & Hydraulics
| NID Storage | 52 acre-ft |
| Max Storage | 52 acre-ft |
| Normal Storage | 37 acre-ft |
| Surface Area | 4 acres |
| Max Discharge | 6,052 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | PINEWOOD SPRINGS WATER DISTRICT (LONGWORTH, BOBBY) |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/12/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO02932 |
| Federal ID | CO02932 |
| More Info | State Dam Safety Program |