Heidelberg Materials Lewisville Phase 1 Dam
Heidelberg Materials Lewisville Phase 1 Dam is an earth dam located in Clark County, Washington, built in 2007. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Heidelberg Materials Lewisville Phase 1 Dam
Heidelberg Materials Lewisville Phase 1 Dam is a dam in Clark, Washington. The dam is owned by Heidelberg Materials (private).
The dam stands 39 feet tall and stretches 1,400 feet across, has a maximum storage capacity of 293 acre-feet, and collects water from a drainage area of 13 square miles. Completed in 2007, 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 02/14/2020.
At 39 feet, this dam is taller than 86% 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 Washington 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 | Washington |
| County | Clark |
| Coordinates | 45.80949, -122.56580 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Length | 1,400 ft |
| Year Completed | 2007 (19 years old) |
Storage & Hydraulics
| NID Storage | 293 acre-ft |
| Max Storage | 293 acre-ft |
| Normal Storage | 266 acre-ft |
| Drainage Area | 13 sq mi |
| Max Discharge | 11 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Heidelberg Materials |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/14/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00775 |
| Federal ID | WA00775 |
| More Info | State Dam Safety Program |