35-Table 2 A B Contractors Approach.docx

This is a contractor's approach documentation for the Southwest 96-inch Water Transmission Pipeline Project, a City of Dallas water infrastructure initiative managed by Project Manager Tracey Long, PE. The project involves installation of approximately 14,300 linear feet of 96-inch steel water pipe, 570 linear feet of 78-inch steel water pipe, and 30 linear feet of 54-inch prestressed concrete cylinder water pipe using combined open cut and tunneling methods, along with cathodic protection, electrical systems, instrumentation and controls for electrically actuated valves, and site and paving restoration. Plans, specifications, and bid proposal spreadsheets were made available on the Bonfire platform at https://dallascityhall.bonfirehub.com/ on Friday, March 13, 2026, prior to 4:00 p.m.

The document presents two tables detailing the contractor's proposed approach to nine tunnel segments identified by stationing locations. Table 2A outlines the contractor's approach per contract documents, specifying terminal shaft locations and sizes, intermediate shaft requirements, initial support methods, and tunneling methods for each tunnel segment. Table 2B presents alternate proposals for the same tunnel segments. Notably, several tunnel segments are marked as "NOT ALLOWABLE," while segments 5 and 8 identify steel casing combined with open or closed face pipe jacking as the proposed tunneling method. The tables establish the framework for evaluating contractor methodology and compliance with project requirements for subsurface construction activities.