Projects

Flood Mitigation Projects

Flood Mitigation projects will protect infrastructure and improve emergency access to the area by reducing flood risk at multiple road crossings.The projects are primarily derived from the 2016 Flood Protection Plan (FPP). The FPP is a “study to quantify relative flood risk level within the Upper Brushy Creek watershed”…“to identify existing creek flooding concerns, prioritize those concerns, and propose potential alternatives for the mitigation of the highest priority concerns”. The District is currently focused on addressing flooding in two of the most at-risk areas in the County.

Flood Mitigation Projects

Project Name
 Status Funding Source
Dam 8 - Ganzert Lake (private property)
 Complete
 Budgeted
Dam 101 - (private property)
 Under Construction
 Bonds, Mixed, and City Partner
Block House Creek (Cedar Park)
 Project Managed by City of Cedar Park CIP Budget Funds and City Partner


Dam Rehabilitation Projects

Like all aging infrastructure, dams require rehabilitation to keep them working safely and effectively. The 2020 Dam Assessment Study categorized breach risk using the Joint Federal Risk Category method – an approach developed by multiple federal dam agencies for use in portfolio risk management (FEMA 2015). The Study prioritized rehabilitation projects to evaluate and implement the most cost-effective ways to alleviate current issues and protect against future ones.

Dam Rehabilitation Projects

Project Name
 Status Funding Source

Dam 4 -   Spanish Oak Creek (private property)

 Complete
 Bonds

Dam 14 Phase 1 - Meadow Lake

 Under Construction
 Bonds

Dam 14 Phase 2-Meadow Lake

 Preliminary Design
 Bonds

Dam 15 - Paloma Lake

 Complete
 Bonds

Dam 16-  CR 112 (private property)

 Preliminary Design Bonds

Dam 22 - CR 139 (private property)

 Substantially Complete
 Bonds

Rehabilitation Projects typically include work on the type of items listed below:

  • Embankments - As earthen dams age, their steep, sloping sides can become unstable as their soil settles or as animals or people compromise the soil, vegetation, etc. The Dam Assessment Study found that approximately 25% of the risk of the District’s portfolio is associated with the embankments and parapet walls.
  • Principal Spillways - Water typically leaves a dam’s reservoir through its principal spillway. The spillway’s many elements can deteriorate over time and require reinforcement or replacement. The Dam Assessment Study found that only a small percentage of the District’s portfolio had principal spillway issues. In addition, to remediate existing issues the District will look to optimize the spillway capacity.
  • Auxiliary Spillways - Auxiliary spillways perform the critical unction of safely passing floodwaters without compromising the dam’s integrity. Erosion on an auxiliary spillway can result in damage and potential dam failure. The Dam Assessment Study found that more than 60% of the risk of the District’s portfolio is associated with the auxiliary spillways. Rehabilitation projects will strengthen the spillways and protect against future issues.
  • Go to our Typical Dam Design page for graphics showing embankments and spillways.