Rainbow Lake Dam
Rainbow Lake Dam is an earth dam located in Cattaraugus County, New York, built in 1964. It carries a Significant hazard potential classification.
About Rainbow Lake Dam
Rainbow Lake Dam is a dam in Cattaraugus, New York. The dam is owned by Allegany Mountain Rv Resort (private). It impounds the Tr-east Otto Creek near East Otto.
The dam stands 22 feet tall and stretches 1,040 feet across, creates a reservoir covering 51 acres, has a maximum storage capacity of 745 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1964, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 05/17/2023.
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Location
| State | New York |
| County | Cattaraugus |
| Nearest City | East Otto |
| River/Stream | Tr-east Otto Creek |
| Coordinates | 42.35361, -78.69333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 1,040 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 745 acre-ft |
| Max Storage | 745 acre-ft |
| Normal Storage | 500 acre-ft |
| Surface Area | 51 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 343 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | ALLEGANY MOUNTAIN RV RESORT |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 05/17/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY00840 |
| Federal ID | NY00840 |
| More Info | State Dam Safety Program |