Dieterich Dam #1
Dieterich Dam #1 is a masonry dam located in Dutchess County, New York, built in 1900. It carries a Significant hazard potential classification and has a poor condition assessment.
About Dieterich Dam #1
The primary purpose of Dieterich Dam #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Dominic Jr. & Louis Molella;molella Realty Corp, Inc. (private). It impounds the Wappinger Creek near Millbrook.
The dam stands 23 feet tall and stretches 42 feet across, creates a reservoir covering 2 acres, and has a maximum storage capacity of 15 acre-feet. Completed in 1900, the structure is over a century 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 03/22/2023.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New York |
| County | Dutchess |
| Nearest City | Millbrook |
| River/Stream | Wappinger Creek |
| Coordinates | 41.79194, -73.69500 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 42 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 15 acre-ft |
| Max Storage | 15 acre-ft |
| Normal Storage | 13 acre-ft |
| Surface Area | 2 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | DOMINIC JR. & LOUIS MOLELLA;MOLELLA REALTY CORP, INC. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 03/22/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NY13820 |
| Federal ID | NY13820 |
| More Info | State Dam Safety Program |