Res 2023-001/approving an Interlocal Agreement with Hays County providing for the County to fund $2,000,000.00 toward the purchase of easements and right-of-way for the Purgatory Creek Improvements Project

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ADDITIONAL DETAILS Overall Purgatory Creek Improvements Project Description - The City of San Marcos is currently conducting the Purgatory Creek Channel Improvements project. The project objective is to provide flood mitigation including natural channel designs, riparian and prairie restoration, vegetation management, improving water quality through storm water infiltration and proposed multi-use trails that provide connectivity to adjacent park space and residential accessibility. This trail will function in concert with multiple other trails (existing and proposed)to complete a total of approximately 19 mile trail system in the City and Hays County. In addition the project includes hydrologic and hydraulic analysis; bridge, road and utility modifications, permitting with various agencies, and coordination with the Union Pacific Railroad. The project designs were broken up into multiple phases and should be completed over several years. Currently,the natural channel improvement project design has been split into 2 phase areas and we plan on breaking into smaller projects in the future. The Phase 1 Area is for the Purgatory Creek channel reach is located between its confluence with the San Marcos River and to an area near Johnson Avenue. The Phase 2 Area consists of the channel reach starting at Johnson Avenue to Wonder World Drive. For the Phase 1 Area,30%Level of Design documents have been prepared, and for the Phase 2 Area,conceptual designs have been identified in a Preliminary Engineering Report (PER). Overall Purgatory Creek Improvements project construction costs estimates are anticipated to cost$55 to$65 million. To complete this project,the City will start breaking this project into multiple smaller phases overthe next several years. We will use the high-level concept from the previously approved PER and 30%Designs and start focusing on easement and ROW acquisitions. As ROW gets cleared,smaller projects will begin such as utility relocations. The City will continue to identify alternative funding sources, including but not limited to: City Bond Projects,CIP funds,TWDB funding and other sources. Work Completed-As of today,the City has expended over$2.5 million towards the project by conducting and completing the following: • Preliminary Engineering Report dated March 15, 2019. The PER summarized preliminary evaluations forthe Purgatory Creek project area (Phase 1 and 2) including natural channel design, hydrologic and hydraulic analyses, right-of-way evaluation, utility conflict evaluation, environmental review, archeological review and permitting requirements. • 30%Level of Designs(Phase 1 Area)dated January 29, 2021. Services conducted and documents prepared included design drawings,technical reports and construction cost estimates. • Value Engineering (Phase 1 Area), December 2021. An independent evaluation of proposed concepts and 30%designs to determine that resiliency/sustainability elements were considered, identification of potential design alternatives and options that do not diminish the goal and long- term value of the project. Work Underway-As of today,the City has started work valued at$1.3 million by conducting the following: