Built in 1955 for irrigation purposes, the dam stands at a height of 20 feet and has a storage capacity of 428 acre-feet. With a spillway width of 15 feet and a maximum discharge of 588 cubic feet per second, the dam poses a significant hazard potential and is classified as having a fair condition assessment as of August 2019.
Despite its age, Donnelly #1 is still regularly inspected and meets state regulatory standards for permitting, inspection, and enforcement. The dam's risk assessment is categorized as moderate, indicating a level 3 risk. The emergency action plan for the dam was last revised in March 2020, ensuring that appropriate measures are in place in case of a potential failure. Overall, Donnelly #1 serves as a vital piece of infrastructure for irrigation in the region, highlighting the importance of proper maintenance and monitoring for water resource and climate enthusiasts.
Year Completed |
1955 |
Dam Length |
270 |
Dam Height |
20 |
River Or Stream |
KISER CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
29 |
Hydraulic Height |
20 |
Nid Storage |
428 |
Structural Height |
25 |
Outlet Gates |
Slide (sluice gate), Uncontrolled |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
25 |
| Location | Reservations | Toilets |
|---|---|---|
Kiser Creek
|
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Crag Crest Campground - Grand Valley RD
|
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Eggleston
|
||
Ward Lake Campground - Grand Valley RD
|
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Ward Lake
|
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Carp Lake
|