20210519-002b: Country Club West Creek at Roy G. Guerrero Park Update — original pdf

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Country Club Creek West at Roy G Guerrero Park Environmental Commission May 19, 2021 Janna Renfro, P.E. Project Sponsor Watershed Protection Department 1 Project Area Roy G. Guerrero Colorado River Metro Park • 363 acres • Constructed drainage channel – Country Club West • Original drainage • channel – Country Club East Improvements constructed in 2010 2 Erosion Damage • 2015 Floods • Severe erosion created a shorter path to the river. • Pedestrian bridge collapsed • May 2015 - December 2017: Erosion damaged ~1500 feet (5 acres) of drainage channel • 100s of trees lost • 2500 dump truck loads of sand and soil (~37,000 cubic yards) 3 Permanent Solution • ~2,000 linear feet of channel stabilization • Three concrete “drop structures” • Natural channel between structures • Bridge over middle structure above 100- year flood elevation 4 Temporary Repairs • Project No. 1 • 2017 • Protect Ballfields Interim Project № 1 Permanent Project 5 Temporary Repairs • Project No. 2: • 2018 • Stop headcut from moving upstream Interim Project № 2 Permanent Project 6 2019 – 2021 Update Items • Erosion Progresses • Three New Temporary Repair Projects ◦ Wastewater Line ◦ Park Road ◦ Headcut • 60% and 90% Design Deliverable ◦ Updated Construction Cost Estimate ◦ Schedule 7 Temporary Repairs • Project No. 3: • 2019-20 • Protect 54” Active Wastewater Line Interim Project № 3 Permanent Project 8 Temporary Repairs • Project No. 4: • 2020 • Protect Park Road Interim Project № 4 Permanent Project 9 Temporary Repairs • Project No. 5: • 2020 • Repair failed temporary headcut stabilization Interim Project № 5 Permanent Project 10 90% Design & Cost Estimate • 90% Design – Received April 2021 • Construction Cost Estimate — $22M - $28M 11 Project Schedule Complete Design Bid Begin Construction Complete Construction 12