Title
Consider and take action on a resolution authorizing a professional services agreement with Lockwood, Andrews & Newnam, Inc. for the Phase 2 - Design, related to the Condition Assessment and Rehabilitation of the City’s large diameter transmission waterlines (WT2501) in an amount not to exceed $1,170,597.65 (Executive Director of Capital Projects)
Background:
Approval of this resolution will authorize a professional services agreement with Lockwood, Andrews & Newnam, Inc. (LAN) for the Phase 2 - Design, related to the Condition Assessment and Rehabilitation of the City’s large diameter transmission waterlines (WT2501) in an amount not to exceed $1,170,597.65.
This Design Phase is part of a multi-phase program to conduct a condition assessment, plan, and rehabilitate and/or replace City’s ~50-year-old, 42-inch and 39-inch diameter water supply transmission lines currently serving as League City’s primary surface water source from the City of Houston’s Southeast Water Purification Plant. The approximate 20,000-foot transmission line is located primarily along State Highway 3 and Calder Road starting from SH 3 Booster Station in Webster and ending near League City Parkway (See Attachment 3). Line material is primarily composed of Prestressed Concrete Cylinder Pipe (PCCP) with steel pipe segment at Clear Creek.
The Preliminary Phase (Study) of the project concluded November 30, 2025. Study scope included:
- Comprehensive research of pipe alignment and history.
- Close interval surveys to evaluate potential pipe coating defects and electrical discontinuities.
- Evaluation of assessment and rehabilitation methods.
- Soil and environmental factors influencing corrosion risks.
- Study pipe assessment methods and costs.
The study looked at three (3) primary methods of assessment:
1. A Free-Swimming Electromagnetic Inspection.
2. A Tethered Electromagnetic with CCTV Inspection.
3. A Manned Electromagnetic with Manned Assessment.
Upon evaluation, O...
Click here for full text