AGENDA INFORMATION SHEET
DEPARTMENT: Materials Management
ACM: Bryan Langley
AGENDA DATE: December 6, 2016
SUBJECT
Title
Consider adoption of an ordinance authorizing the City Manager to execute a professional services agreement for Pipeline Inspection and Condition Assessment at the Lake Lewisville Water Treatment Plant; providing for the expenditure of funds therefor; and providing an effective date (File 6281-awarded to Pure Technologies U.S. Inc. in an amount not-to-exceed $592,740). The Public Utilities Board recommends approval (6-0).
Body
FILE INFORMATION
The Lake Lewisville Water Treatment Plant, (LLWTP) currently represents approximately 60% of the City’s water supply system. The LLWTP is located at the DME/Garland Power and Light complex off of Spencer Road and is supplied with untreated water from a pumping station located on the Hickory Creek arm of Lake Lewisville. The untreated water transmission pipeline system was built in phases with a 27 inch Concrete Cylinder Pipe (CCP) pipeline constructed within a 30 foot wide water pipeline and electric power line easement in 1956-57 and a 30 inch (CCP) pipeline constructed with a Union Pacific Rail Road right of way in 1975.
The 30 inch water line had some recent failures and the quality of the pipe bedding material (native soils were used instead of sand) and installation may be of continued concern. Due to the failure history and the competing use of the Rail/Trail corridor, staff recommends performing a pipeline condition assessment for the 30 inch untreated water transmission pipeline. This project was included in the FY 2016-17 adopted budget. The 27 inch raw water pipe line was properly embedded in sand as specified and found in better condition than the 30 inch pipe line on multiple occasions over the years-including the I-35E widening project in April, 2015. Due to relatively good condition of the 27 inch water line, the staff recommends assessing this pipe condition within the next five (5) years.
The best available technology to perform this condition assessment for the pipeline is using a multi-sensor inspection vehicle with electromagnetics and closed circuit television (CCTV) system available through one of two (2) sole source/high technology providers, Pure Technologies U.S., Inc. and Pipeline Inspection and Condition Analysis Corporation (PICA). The condition assessment report will be the basis for the upcoming pipeline rehabilitation work in the fiscal year 2017 and 2018 Capital Improvement Plan (CIP).
Pure Technologies uses a multi-sensor inspection vehicle with electromagnetics and high definition digital pan-tilt-zoom CCTV system marketed under the trade name PureRobotics. The advanced, remotely operated robotic crawler is tethered by a high-strength, fiber optic cable. The modular based transporter is completely open ended, and can be equipped with any tool or sensor required to carry out an inspection. The tool uses CCTV in addition to the electromagnetic sensors, Laser profiling, and Lidar with 3D reporting capabilities for assessing the structural integrity of the pipeline. Pure Technology has developed and patented this technology and their sole source letter is attached with this memorandum.
Pipeline Inspection and Condition Analysis Corporation (PICA) uses a patented pipeline inspection tool “SeeSnake” that employs Remote Field Technology (RFT) for measuring pipe wall thickness continuously along the length of the water line and detects corrosion, wall thinning and graphitization. This inspection tool is capable of inspecting a maximum pipe size diameter of 28 inches. The inspection system is not able to visually inspect the pipe interior.
Based on the documentation and references provided by the two (2) providers, the “PureRobotics” inspection vehicle from Pure Technologies has the necessary accuracy and visual inspection capability to assess the condition of the 30 inch untreated water transmission pipe line. The “SeeSnake” inspection tool from PICA is deficient in the capabilities to accurately perform the pipe line condition assessment. In addition, existing pipeline flanges, on the untreated water transmission pipeline, make the deployment and retrieval of the “PureRobotics” unit easier to accommodate over the much larger PICA “SeeSnake” system.
In 2015, the City of Austin has signed a sole source (unique technology) multi-year contract with Pure Technologies to perform condition assessment and leak detection of large diameter pipelines. Pure Technologies also performed similar pipe condition assessments for the Trinity River Authority (TRA), City of Flower Mound, and City of El Paso. The negotiated agreement with Pure Technology (Exhibit 4) was based upon the unit pricing methodology and costs contained in the much larger Austin Water Utilities annual contract agreement.
PRIOR ACTION/REVIEW (COUNCIL, BOARDS, COMMISSIONS)
On November 7, 2016, the Public Utilities Board recommended approval to forward this item to the City Council for consideration.
RECOMMENDATION
Award a professional services agreement for Pipeline Inspection and Condition Assessment at the Lake Lewisville Water Treatment Plant to Pure Technologies U.S. Inc. in an amount not-to-exceed $592,740. The amount recommended by staff is based upon the following:
Mobilization including site reconnaissance and equipment fee (lump sum) $40,000
EM Technology Fee for > 5mile inspection ($8.50/foot*8.5 miles*5,280 feet/mile) $381,480
Surcharge for Enhanced EM technology required to assess bar wrapped pipe $89,760
($2.00/foot*8.5 miles*5,280 feet/mile)
Pipe Performance Risk Curve $5,400
Pipe-by-Pipe GIS Compilation and Deliverable ($1.25/foot*8.5 miles*5,280 feet/mile) $56,100
Pipe Verification Services ($5,000 per day) - 4 Days $20,000
Total Fee for EM Inspection, Verification and Deliverable $592,740
PRINCIPAL PLACE OF BUSINESS
Pure Technologies U.S. Inc.
Addison, TX
ESTIMATED SCHEDULE OF PROJECT
This project is estimated to be completed in July 2017.
FISCAL INFORMATION
The purchase of the services will be funded from the Water Capital Fund account 63035517.1360.40100. Requisition# 132010 has been entered in the Purchasing software system.
STRATEGIC PLAN RELATIONSHIP
The City of Denton’s Strategic Plan is an action-oriented road map that will help the City achieve its vision. The foundation for the plan is the five long-term Key Focus Areas (KFA): Organizational Excellence; Public Infrastructure; Economic Development; Safe, Livable, and Family-Friendly Community; and Sustainability and Environmental Stewardship. While individual items may support multiple KFAs, this specific City Council agenda item contributes most directly to the following KFA and goal:
Related Key Focus Area: Organizational Excellence
Related Goal: 2.3 Promote superior utility services and facilities
EXHIBITS
Exhibit 1: Single Source Staff Memo
Exhibit 2: Public Utilities Board Draft Minutes
Exhibit 3: Ordinance
Exhibit 4: Contract
Respectfully submitted:
Chuck Springer, 349-8260
Director of Finance
For information concerning this acquisition, contact: Mamun Yusuf at 349-7523.