Nicolaysen No. 2
Nicolaysen No. 2 is an earth dam located in Natrona County, Wyoming, built in 1909. It carries a Low hazard potential classification and has a fair condition assessment.
About Nicolaysen No. 2
The primary purpose of Nicolaysen No. 2 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Kro Ventures Llc, Attn: Karen Overton (private). It impounds the Dry Muddy Creek near Big Muddy Oil Field.
The dam stands 21 feet tall and stretches 1,741 feet across, creates a reservoir covering 32 acres, and has a maximum storage capacity of 252 acre-feet. Completed in 1909, 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. 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 08/09/2021.
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Location
| State | Wyoming |
| County | Natrona |
| Nearest City | Big Muddy Oil Field |
| River/Stream | Dry Muddy Creek |
| Coordinates | 42.82480, -106.17000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 20 ft |
| Dam Length | 1,741 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 252 acre-ft |
| Max Storage | 252 acre-ft |
| Normal Storage | 175 acre-ft |
| Surface Area | 32 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | KRO VENTURES LLC, ATTN: KAREN OVERTON |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/09/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00210 |
| Federal ID | WY00210 |
| More Info | State Dam Safety Program |