Costelloe
Costelloe is an earth dam located in Morgan County, Colorado, built in 1931. It carries a Low hazard potential classification and has a fair condition assessment.
About Costelloe
The primary purpose of Costelloe is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Riverside Irrigation District (don Chapman) (private). It impounds the Dead Horse Draw near Snyder.
The dam stands 18 feet tall and stretches 640 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 248 acre-feet, and collects water from a drainage area of 18 square miles. Completed in 1931, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/21/2015. That was over 10 years ago.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Colorado |
| County | Morgan |
| Nearest City | Snyder |
| River/Stream | Dead Horse Draw |
| Coordinates | 40.35708, -103.61593 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 640 ft |
| Year Completed | 1931 (95 years old) |
Storage & Hydraulics
| NID Storage | 248 acre-ft |
| Max Storage | 248 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 18 sq mi |
| Max Discharge | 2,940 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | RIVERSIDE IRRIGATION DISTRICT (DON CHAPMAN) |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/21/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00830 |
| Federal ID | CO00830 |
| More Info | State Dam Safety Program |