Lakes Of Deerwood Number One Dam

Lakes Of Deerwood Number One Dam is an earth dam located in Jefferson County, Missouri, built in 1956. It carries a High hazard potential classification.

About Lakes Of Deerwood Number One Dam

The primary purpose of Lakes Of Deerwood Number One Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lakes Of Deerwood (private). It impounds the Tr To Isum Creek near Cedar Hill.

The dam stands 33 feet tall and stretches 425 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 130 acre-feet, and collects water from a drainage area of 100 square miles. Completed in 1956, the structure is well into its service life at over 50 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. The most recent inspection on record was 06/01/1987. That was 38 years ago — unusually long for a high-hazard dam, which typically requires more frequent inspections.

At 33 feet, this dam is taller than 78% of dams nationwide.

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.

High HazardNot Rated ConditionEmergency Action Plan: Not Required

Location

StateMissouri
CountyJefferson
Nearest CityCedar Hill
River/StreamTr To Isum Creek
Coordinates38.33902, -90.60442

Physical Characteristics

Dam TypeEarth
NID Height33 ft
Dam Height33 ft
Dam Length425 ft
Year Completed1956 (70 years old)

Storage & Hydraulics

NID Storage130 acre-ft
Max Storage130 acre-ft
Normal Storage90 acre-ft
Surface Area8 acres
Drainage Area100 sq mi
Max Discharge1,922 cfs

Ownership & Safety

PurposeRecreation
OwnerLAKES OF DEERWOOD
Owner TypePrivate
Hazard ClassificationHigh
Condition AssessmentNot Rated
Last Inspection06/01/1987
Emergency Action PlanNot Required

Identifiers

NID IDMO30431
Federal IDMO30431
More InfoState Dam Safety Program

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