Exposition Park
Exposition Park is an earth dam located in Arapahoe County, Colorado, built in 2002. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Exposition Park
The primary purpose of Exposition Park is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by City Of Aurora, Stormwater Division (earnest, Mike (local government). It impounds the Westerly Creek near Aurora.
The dam stands 19 feet tall and stretches 4,290 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 293 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 2002, the structure is relatively new.
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 03/03/2022.
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 Colorado 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 | Colorado |
| County | Arapahoe |
| Nearest City | Aurora |
| River/Stream | Westerly Creek |
| Coordinates | 39.71056, -104.86083 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 4,290 ft |
| Year Completed | 2002 (24 years old) |
Storage & Hydraulics
| NID Storage | 293 acre-ft |
| Max Storage | 293 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 13,239 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | CITY OF AURORA, STORMWATER DIVISION (EARNEST, MIKE |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 03/03/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO02816 |
| Federal ID | CO02816 |
| More Info | State Dam Safety Program |