Holt's Lake Dam

Holt's Lake Dam is an earth dam located in St. Louis County, Missouri, built in 1973. It carries a High hazard potential classification.

About Holt's Lake Dam

The primary purpose of Holt's Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Chesterfield Lk Own Assc (private). It impounds the Tr To Caulks Creek near Chesterfield.

The dam stands 33 feet tall, creates a reservoir covering 5 acres, has a maximum storage capacity of 226 acre-feet, and collects water from a drainage area of 250 square miles. Completed in 1973, 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 11/18/1980. That was 45 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
CountySt. Louis
Nearest CityChesterfield
River/StreamTr To Caulks Creek
Coordinates38.64645, -90.59429

Physical Characteristics

Dam TypeEarth
NID Height33 ft
Dam Height33 ft
Year Completed1973 (53 years old)

Storage & Hydraulics

NID Storage226 acre-ft
Max Storage226 acre-ft
Normal Storage226 acre-ft
Surface Area5 acres
Drainage Area250 sq mi

Ownership & Safety

PurposeRecreation
OwnerCHESTERFIELD LK OWN ASSC
Owner TypePrivate
Hazard ClassificationHigh
Condition AssessmentNot Rated
Last Inspection11/18/1980
Emergency Action PlanNot Required

Identifiers

NID IDMO11105
Federal IDMO11105
More InfoState Dam Safety Program

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