Page 478 - FY 2009 Proposed Budget

Public Safety

Goal 2: Mitigate Flood Risks and Protect Stormwater Infrastructure
Objective 2: Complete Watershed Studies for Each Watershed within the City
Project Performance Measure(s) City Service Team (Department)
Core Watershed Studies Completion of all watershed studies by Economic Development and Capital
PS the end of FY 2020 Investment (PWT)
2.2.1
Summary:

Comprehensive watershed studies are important Milestone Estimated Actual
to evaluate current and future flood risk and Completion Completion
identify problem areas that will guide the Create and file geodatabase for May 2020
stormwater program. These watershed studies: watershed features
 Update the hydrology for current Incorporate RLAA Report into Aug. 2020
developed conditions mitigation strategy identified in
 Update the hydraulic models based on watershed studies
the new flows and current creek Create a residential buyout and Sept. 2020
conditions 5‐year buyout plan
 Identify and prioritize problem areas and Create rating geodatabase for Oct. 2020 Oct. 2020
generate conceptual solutions for these stream conditions from
areas watershed studies and
 Assess the stream bank conditions for geomorphology reports
erosion
 Update the Flood Insurance Rate Maps
based on the new information

This data benefits the citizens of Arlington by
informing them of the flood risk for their homes,
so they can take protective action. It also identifies
flood protection projects to be incorporated into
the Stormwater Capital Improvement Plan.
Arlington's nine major watersheds have been
grouped into six major study areas. The
Stormwater Division plans to include watershed
studies in its budget each year until all the major
watersheds in the City have been studied.

This project will strategically plan mitigation tasks Residential buyout locations from all watershed studies were
to proactively rectify deficiencies identified in the identified for the 5‐year buyout plan. 4 structures (2 residential & 2
watershed studies completed in FY 2019. commercial) have been selected for FY 2020 buyout funds. The
acquisition process has been approved and is ongoing. Demolition
Update: is anticipated to take place in winter 2020. The Abram Street
FEMA Effective Dates were received for the building has been demolished which includes two Repetitive Loss
Stream WF(A)‐1 and WF(A)‐2 watershed studies. properties.
Residents have been notified via mailouts.
Staff continues to analyze buyout locations to determine
Staff continued the comparison of data in the prioritization based upon the flood hazard rating and flood depths
Repetitive Loss Area Analysis (RLAA) report with to determine the criticality of each location. FEMA Analysis
the mitigation strategies identified in each program has been installed to assist in this analysis.
watershed study.

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