TO: Mayor and Members of City Council
THRU: Adam Lindsay, Assistant City Manager
FROM: Sheila Thomas-Ambat, Public Services Director
Alicia Lanier, Stormwater Project Manager Special Projects
DATE: May 6, 2024
RE:
Title
Watershed Master Plan Program 2nd Tranche Proposed Solutions
end
COUNCIL DISTRICT(S):
Council District(s)
All
b
Relationship To Strategic Plan:
Supports Goal 3. City investment in Today and Tomorrow, through the Strategic Objective 3.1 Enhance city street connectivity, traffic flow, and stormwater systems.
Executive Summary:
Two presentations are provided to cover the 2nd Tranche of proposed solutions. The first will present proposed solutions from Little Rockfish Creek 1 and Bones Creek watershed studies. The second presentation will cover Cross Creek watershed study. From this presentation, staff seeks concurrence from City Council to approve staff to program the proposed solutions from Little Rockfish Creek 1 and Bones watershed studies into the annual CIP prioritization process and pursue grants as applicable.
Background:
The Watershed Master Plan program was initiated in FY 2019 to provide a comprehensive City-wide evaluation of the flooding issues in Priority 1 areas and to develop proposed solutions. Priority 1 areas to be studied were identified by high level modeling of the 15 watersheds in the city, with results vetted by staff and compared to historical flooding complaints.
For each watershed studied to date, a score to identify areas of concern is developed based on impacted lane length, emergency facilities, road-crossing risks, and disconnected structures, and impacted structures. The level of service, defined as the largest storm event that can be safely conveyed by the stormwater system or asset, is identified for existing assets. Where the desired level of service is not met, proposed solutions are developed to mitigate the impacts. How well the proposed solution mitigates the flooding is ca...
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