Crystal Lake Dam
Crystal Lake Dam is an earth dam located in Washington County, Missouri, built in 1980. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Crystal Lake Dam
The primary purpose of Crystal Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is private-owned. It impounds the Harris Branch near Anthonies Mill.
The dam stands 65 feet tall and stretches 1,260 feet across, creates a reservoir covering 52 acres, has a maximum storage capacity of 1,770 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1980, the structure is 46 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 07/26/2022.
At 65 feet, this dam is taller than 96% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Missouri dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Missouri |
| County | Washington |
| Nearest City | Anthonies Mill |
| River/Stream | Harris Branch |
| Coordinates | 38.09895, -91.06598 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 65 ft |
| Dam Height | 65 ft |
| Dam Length | 1,260 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 1,770 acre-ft |
| Max Storage | 1,770 acre-ft |
| Normal Storage | 1,770 acre-ft |
| Surface Area | 52 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,088 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/26/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO31837 |
| Federal ID | MO31837 |
| More Info | State Dam Safety Program |