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Leveraging Local Funds to Provide Big Results: Bryan, TX

TFMA Fall Conference Abstract

Authors:

Scott Hubley, P.E., CFM - Freese and Nichols, Inc.              Garrett Johnston, E.I.T. - Freese and Nichols, Inc. 

Brett McCully, P.E. - City of Bryan

Leveraging Local Funds to Provide Big Results: Bryan, TX

This presentation will give an overview of how the City of Bryan conducted a stormwater master plan, secured a grant to study the highest priority problem area, and then applied for a grant to construct the recommended improvements. The City of Bryan has numerous hydraulic and hydrologic studies completed for their watersheds, but needed a way to combine the information from these studies and implement a plan for improvements. The Bryan Stormwater Masterplan project consists of managing and prioritizing various problems and projects that were identified from numerous studies, and then develops a City-approved ranked capital improvement plan (CIP). The CIP uses Microsoft Access to organize and create a sustainable implementation plan for the chosen projects. The Lynndale Acres subdivision in the Still Creek watershed was identified by the City's Stormwater CIP Masterplan as the most severe flooding problem in Bryan, Texas. As the first step to identify a possible solution, the City secured a Flood Protection Planning grant from the Texas Water Development Board to conduct a watershed study. The study determined that a combination of insufficient channel capacity and inadequate drainage infrastructure causes runoff to back up and overtop roads, causing extensive flooding of homes in the subdivision. FNI conducted an existing conditions analysis using an InfoWorks SD two-dimensional hydraulic model in conjunction with HEC-HMS and HEC-RAS models. Radar rainfall data was obtained for two recent storms and used to verify model results. Then, an alternatives analysis was conducted to identify and recommend proposed drainage improvements to reduce the flood hazard risk. The recommended solution is a combination of detention ponds, storm sewers, and culvert improvements that provide 100-year flood protection to the homes. A FEMA Benefit-Cost Analysis was used to evaluate the benefit-cost ratio of the recommended improvements. Three public meetings were also held to inform residents throughout the process and gather their input. These improvements were included in a FEMA SRL grant funding application and were well received but was not approved due to their HMAP still being in the review process. This presentation will give an overview of the entire process and show how one Texas municipality is leveraging their limited storm water utility funds to have a big impact in their community.

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