Lake Jacomo Dam
Lake Jacomo Dam is an earth dam located in Jackson County, Missouri, built in 1956. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Lake Jacomo Dam
The primary purpose of Lake Jacomo Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Jackson County (local government). It impounds the East Fork Little Blue River. near Lees Summit.
The dam stands 74 feet tall and stretches 1,550 feet across, creates a reservoir covering 1,221 acres, has a maximum storage capacity of 38,620 acre-feet, and collects water from a drainage area of 26 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. 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 10/14/2021.
At 74 feet, this dam is taller than 97% 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 | Jackson |
| Nearest City | Lees Summit |
| River/Stream | East Fork Little Blue River. |
| Coordinates | 38.99298, -94.30790 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 74 ft |
| Dam Height | 74 ft |
| Dam Length | 1,550 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 38,620 acre-ft |
| Max Storage | 38,620 acre-ft |
| Normal Storage | 25,730 acre-ft |
| Surface Area | 1,221 acres |
| Drainage Area | 26 sq mi |
| Max Discharge | 43,600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | JACKSON COUNTY |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/14/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MO10045 |
| Federal ID | MO10045 |
| More Info | State Dam Safety Program |