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, Option 1 was found to be more comprehensive and reliable.
In Phase 2 - Design the consultant is proposing to use the Free-Swimming Electromagnetic inspection conducted by Pure Technologies’ PipeDiver with Leak Detection method to identify and quantify distress associated with broken prestressing wire wraps and screen for acoustic indications of leaks and trapped air pockets. The information from the assessment will then be used to prepare construction documents and details for the rehabilitation of the pipe. Depending on the estimated cost of rehabilitation, construction may be phased.
LAN has submitted a proposal to conduct the Pure Technologies PipeDiver Assessment, evaluations, and the preparation of construction documents, and assist in one (1) bid phase. Since the scope of construction cannot be defined until full assessment and construction documents are complete, a separate construction phase services will be submitted by LAN at a later date.
The breakdown of fees for the proposed Design Phase 2 is as follows:
Engineering & Assessment:
1. Pure Technologies PipeDiver Assessment $669,334.80
2. Preparation of Construction Documents $369,412.85
3. Bid & Award Phase $ 10,850.00
Engineering & Assessment Subtotal $1,049,597.65
Additional Services As Needed:
4. Contractor Support for Field Assessment $81,000.00
5. Surveying $15,000.00
6. Reimbursable Expenses $25,000.00
Additional Services as needed Subtotal $121,000.00
Total $1,170,597.65
Design is anticipated to take 16 months to complete, excluding review and approval periods
Attachments:
1. Proposed Resolution
2. Exhibit A - PSA with Proposal
3. Project Aerial Layout Map
4. CIP Project Sheet
5. CIP Aerial Map (Modif.)
6. Vendor Report Card
FUNDING
{X} Funding in the amount of $1,170,598 is available from Miscellaneous Utility Capital Projects Fund, fund 1055, with expenses charged to project expense string WT2501-PLAN DESIGN-DESIGN- RS CASH.
STRATEGIC PLANNING
{X} Addresses Strategic Planning Critical Success Factor #1: Develop and Maintain our Infrastructure.