Grant B
Key Takeaway
Grant B is classified as low hazard in Colorado. It was completed in 1910 and is 116 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 19 ft (taller than 32.7% in CO) |
| Dam Length | 1,200 ft |
| Dam Type | Earth |
| Max Storage | 250 acre-ft |
| Normal Storage | 130 acre-ft |
| Surface Area | 27 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,052 cfs |
| Year Completed | 1910 (116 years old) |
| NID ID | CO01818 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
SIMONSON & ASSOCIATES (SIMONSON, JUDY)
Private
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High Hazard 17 ftFrequently Asked Questions
What is the hazard classification of Grant B?
Grant B is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Grant B?
Grant B is owned by SIMONSON & ASSOCIATES (SIMONSON, JUDY) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grant B built?
Grant B was completed in 1910, making it 116 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Grant B?
Grant B serves the following purposes: Irrigation, Recreation, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Grant B?
Grant B has a dam height of 19 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Grant B last inspected?
Grant B was last inspected on April 8, 2016. Inspection dates indicate when a formal review occurred, not the results of that inspection.