Longmont Reservoir, located in Lyons, Colorado, is a concrete gravity dam built in 1900 primarily for water supply purposes.
Wind
Humidity
With a height of 30 feet and a storage capacity of 75 acre-feet, this reservoir serves as a key water resource for the surrounding area. Situated along the North St. Vrain Creek, the reservoir covers an area of 5 acres and has a drainage area of 108 square miles, with a maximum discharge capacity of 3000 cubic feet per second.
Despite its age, Longmont Reservoir has been well-maintained and is in satisfactory condition according to its last inspection in 2015. Classified as a low hazard potential structure, the reservoir has a regular inspection frequency of every 6 years. While it lacks a spillway, the dam's risk assessment is considered high, indicating the importance of ongoing monitoring and risk management measures. With its strategic location and vital role in water supply, Longmont Reservoir is a significant reservoir for water resource and climate enthusiasts to study and appreciate in the Boulder County region.
Year Completed |
1900 |
Dam Length |
110 |
Dam Height |
30 |
River Or Stream |
NORTH ST. VRAIN CREEK |
Primary Dam Type |
Concrete |
Surface Area |
5 |
Hydraulic Height |
30 |
Drainage Area |
108 |
Nid Storage |
75 |
Structural Height |
30 |
Hazard Potential |
Low |
Nid Height |
30 |
| Location | Reservations | Toilets |
|---|---|---|
Meadow Park
|
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Glacier View Ranch
|
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Olive Ridge Campground
|
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Olive Ridge
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Carter Lake - South Side Campgrounds
|
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Hermit Park Open Space
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