03-1: Springfield Liftstation Abandonment Presentation — original pdf

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Springfield Lift Station Abandonment CIP No. 3168.125 Chapter 26 Application for Austin Water Infrastructure within Parkland at Onion Creek Metro Park & Marble Creek Greenbelt Parks and Recreation Board Meeting City Hall Chambers October 28th, 2024 “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 1 1 Agenda • Project Summary • Background • Route Evaluation • Parkland Impacts • Project Timeline • QA “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 2 Project Summary • To install a wastewater interceptor that will allow for the abandonment of an existing lift station • Approximately 3,400 linear feet of 36-in PVC wastewater line • 4 bore pits • Approximately 1,000 linear feet of trenchless construction • Approximately 2,400 linear feet of open cut “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 3 Background • Historic floods within the Onion Creek floodplain • Lift station currently lies more than 10 feet below the 100-year floodplain • Rapid redevelopment is expected resulting in significant increases in wastewater flows • No access during flood. Continued near-term operation of the lift station will require significant rehabilitation to elevate electrical equipment above the floodplain • Due to space constraints and costs, upgrading the lift station to meet future capacity requirements is not a practical solution “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 4 Route Evaluation • Option 1 (Red) • Greater area of parkland Require easements from outside entities In conflict with two petroleum pipelines • Option 2 (Yellow) Utilizes the city’s Right Of Way • Only city-owned land • • • “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 5  “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 6  “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 7 Minimizing Impacts to Parkland • Jack and Bore to preserve trees and prevent road closures - 0 heritage trees will be removed • Protective fencing will be used to prevent damage to nearby trees and natural areas • Contractor will follow a robust engineered design to prevent settlement and erosion • Abandoned lift station will be completely • All disturbed parkland will be restored and revegetated revegetated “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 8 Project Timeline • Design Phase Ends Summer 2024 • Bid/Award Phase Fall 2024 • Construction Phase Winter 2025 “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 9 Chapter 26 Section 26.001. Protected Land; Notice of Taking. • State entities cannot approve programs or projects that use or take public land designated for parks, recreation, scientific areas, wildlife refuges, or historic sites unless their authorized governing body or officer determines: 1) There is no feasible and prudent alternative to the use or taking of such land 2) The program or project includes all reasonable planning to minimize harm to the land, as a park, recreation area, scientific area, wildlife refuge, or historic site, resulting from the use or taking “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 10 QUESTIONS + ANSWERS Claudia Corsetti, P.E., CFM, PMP Project Manager, City of Austin Claudia.corsetti@austintexas.gov 512.974.7205 Axton Vorpahl, P.E. Austin Water Sponsor, City of Austin Axton.vorpahl@austintexas.gov 509.230.2396 “Effectively and Efficiently Deliver Quality Projects with the Concept of Speed” 11 11