B2: A-Watershed Protection Presentation — original pdf

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Lady Bird Lake - Canterbury at Mildred Street and Utility Repair Subproject - 10613.007 Parks and Recreation Board Location Map Canterbury-Mildred Project Scope of Work Mildred Elementary School Phase 1 - Primary Project Area • Expose 6X9’ storm drain, wrap joints, backfill with CLSM and flex base. Full street depth/width reconstruction + curb & gutter Storm Drain Upgrades • • • • 15” to 36” mains 15”to 18” laterals, 5 ft to 10 ft inlets • Water Upgrades - 6” CI to 8” CI • WW Replacement - @ 8” alley crossing only Phase 2 - Additional Utility Upgrades Storm drains - 15” to 42” mains Water – 6” to 8” WW – replace @ alley crossing (2) i S t a g n g A r e a C o n s t r u c t i o n P o t e n t i a l Phase 1 - Additional Street Reconstruction Metz Park Problem Description • July 7, 2020 Austin Water (AW) had a waterline break on the block of Mildred St between Canterbury St and Willow St. • This incident resulted in failure and collapse of the street at break location along with differential settling of pavement along a 6’x9’ storm drain box constructed in 2010 • AW made repairs to sinkholes with backfill and cold mix to stabilize the roadway • Segments of both Canterbury and Mildred Streets require mitigation to achieve permanent stabilization of the roadways Problem Photos Parkland Area Use Request Questions?