Item 03 - Northwest Lift Station Improvements - Rock Harbor Force Main and Four Points 2 — original pdf

Backup

Item 2 Water & Wastewater Commission: May 20, 2026 Council: May 28, 2026 Posting Language ..Title Recommend approval to authorize additional contingency for the construction contract for the Northwest Lift Station Improvements: Rock Harbor Force Main and Four Points #2 for Austin Water with Santa Clara Construction, LTD to increase the amount by $537,225 for a total amount not to exceed $5,280,171. Funding: $537,225 is available in the Capital Budget of Austin Water. ..Body Lead Department Austin Financial Services. Managing Department Austin Capital Delivery Services. Fiscal Note Funding is available in the Capital Budget of Austin Water. Procurement Language: Additional Authorization. MBE / WBE: This contract was awarded in compliance with the City Code Chapter 2-9A (Minority-Owned Business Enterprise and Women-Owned Business Enterprise Procurement Program). Current participation is 40.68% MBE and 2.09% WBE. Prior Council Action: February 13, 2025 – Council approved a contract with Santa Clara Construction LTD for NWLS Improvements: Rock Harbour Force Main and Four Points #2. Council Committee, Boards and Commission Action: May 20, 2026 – To be reviewed by the Water and Wastewater Committee. Additional Backup Information: The Rock Harbour Force Main project consists of approximately 4,500 linear feet of a new High-Density Polyethylene force main installed from Rock Harbour Lift Station to the existing ductile iron force main on Vista Parke Drive. The alignment parallels Rock Harbour Drive, crosses FM 620, parallels Wilson Park Avenue, turns south on Woodbay Parke Drive, then connects to the existing Four Points #2 16-inch force main. The proposed force main across RM 620 will be installed via trenchless construction while the remaining force main will be open cut. There will also be 100 linear feet of ductile iron force main installed via open-cut across Wilson Parke Avenue at 12132 1/2 Wilson Parke Avenue. Also included is the demolition of Four Points #2 Lift Station and abandonment of 2,540 linear feet of gravity main and associated manholes. Lastly, the project includes the installation of the final fourth pump at the Rock Harbour Lift Station and changing the impellers on the existing three pumps. At the beginning of construction, Right of Way management identified safety gaps in the approved Traffic Control Plan. The gaps required significant plan redesign that has increased the cost and scope of the Traffic Control Plan. Additionally, the lift station and force main was previously built and maintained by the Northwest Austin Municipal Utility District #1. During construction discrepancies between the as-built drawings and actual below ground field conditions were discovered, resulting in redesign and Traffic Control Plan changes.  Item 2 Water & Wastewater Commission: May 20, 2026 Council: May 28, 2026 There will be continued lane closures in this area since much of the work is located in the right-of- way. There are signs and barricades to guide the traveling public. This project is located within zip code 78726 (District 10).  Item 2 Water & Wastewater Commission: May 20, 2026 Council: May 28, 2026 AUTHORIZATION HISTORY AMOUNT $4,224,496.50 DATE 02/13/2025 $442,449.65 $76,000.00 02/13/2025 02/13/2025 DESCRIPTION (Council) – NLSW: Rock Harbor Force Main and Four Points #2 project (Council) – 10 % Contingency (Administrative Authority) – NLSW: Rock Harbor Force Main and Four Points #2 $537,224.84 $5,280,170.99 05/28/2026 Proposed (Council) – Additional Contingency Total Contract Authorization CONTRACT HISTORY AMOUNT DATE $4,224,496.50 $27,644.00 $89,375.00 $52,808.50 $96,005.00 $22,946.10 $90,593.98 $537,224.84 $5,141,093.92 DESCRIPTION (CO%/CUMULATIVE CO%) Northwest Lift Station Improvements: Rock Harbour Force Main and Four Points #2 02/13/2025 09/08/2025 Change Order # 1 – Traffic Control Phase 5 (.65%/.65%) 10/30/2025 Change Order # 2 – Boring under utilities (2.12%/2.77%) 12/23/2025 Change Order # 3 – Traffic Control Phase 4 (1.25%/4.02%) 02/03/2026 Change Order # 4 – Traffic Control Phase 1, 2B, 3 (2.27%/6.29%) 02/12/2026 Change Order # 5 – Cave and Void Mitigation (.54%/6.84%) Change Order # 6 – Traffic Control Phase 5b and 6 (2.14%/8.98%) Council – CO#7 and additional contingency 03/11/2026 Proposed Total Contract History City of Austin Council Meeting Backup: May 28, 2026 File ID: 26-1698 Rock Harbour FM and Four Points #2 Demolition Project Map Proposed Abandoned Pipe Proposed Pipe Page 1 of 1