Huntsville Raw Water Impoundment
LOCATION: Huntsville, Tennessee
- Steve Bostic
COST: $6.5 Million
- Regulatory Assistance
- Unusual Permitting
- Allowed for Needed Water Supply while Adding a Public Recreational Area
LDA performed the design, permitting, procurement, and construction contract administration services for the Huntsville Utility District’s new raw water impoundment. The impoundment design included a 1,100 feet long by 100 feet high earthen dam to create a 200 acre impoundment to store water for the Huntsville Utility District (HUD) water treatment facility. As part of the project, the water treatment facility was also upgraded. The impoundment design included a new raw water intake that could draw water from multiple levels within the impoundment in order to address a number of potential issues.
One issue is the impoundment being fed by runoff from the surrounding drainage basin, with some input from pumps in the nearby new river, water levels fluctuated based on rainfall. Another issue was the impoundment being surrounded by a heavily wooded area. Due to this, leaves can be problematic during the fall. LDA provided the solution of designing all intakes with flushing connections to expel leaves and other accumulated debris from the screens should they become clogged.
Additionally, with the leaves affecting the impoundment on a yearly basis, decomposition of the leaves and other organic matter at the bottom of the impoundment can lead to water quality issues. To address this issue, the multi-level withdrawal capacity allows HUD personnel to pull water from the most desirable level in the impoundment. The screens are 24-inch diameter Johnson Well screens with connections for air liners to blow leaves and other debris away from the screens.
The new configuration of raw water supply saves maintenance costs compared to the old system and includes a time buffer in case of equipment failure. In addition, LDA provided environmental services related to the permitting of the new impoundment. Based on projections of future water demands, the impoundment can provide raw water in sufficient quantity to serve the Huntsville Utility District’s customers for a period of over 50 years. The Huntsville Raw Water Impoundment project received an ACEC Merit Award in the category of Water, Wastewater, and Water Resources.Back to Projects