Arch Slough is an earth dam located in Delta County, Colorado, built in 1888. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 330 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Arch Slough
The primary purpose of Arch Slough is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Grand Mesa Water Conservancy District (keiser, Pre (public utility). It impounds the Ward Creek-tr near Cedaredge.
The dam stands 15 feet tall and stretches 330 feet across, creates a reservoir covering 12 acres, and has a maximum storage capacity of 108 acre-feet. Completed in 1888, the structure is over a century old.
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. The most recent inspection on record was 07/16/2020.
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Location
| State | Colorado |
| County | Delta |
| Nearest City | Cedaredge |
| River/Stream | Ward Creek-tr |
| Coordinates | 39.04393, -107.97388 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 330 ft |
| Year Completed | 1888 (138 years old) |
Storage & Hydraulics
| NID Storage | 108 acre-ft |
| Max Storage | 108 acre-ft |
| Normal Storage | 66 acre-ft |
| Surface Area | 12 acres |
| Max Discharge | 121 cfs |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Grand Mesa Water Conservancy District (keiser, Pre |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/16/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00334 |
| Federal ID | CO00334 |
| More Info | State Dam Safety Program |