AGENDA ITEM C9. COST/FUNDING SOURCE: $431,847.40/ Uniform Rate

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1 AGENDA ITEM C9 DATE: February 2, 2015 TO: FROM: SUBJECT: Matt Jordan, General Manager Charles Carden, Chief Operating Officer South Pasco Transmission Main Condition Assessment Services with Pure Technologies U.S. Inc. - Approve SUMMARY: A desktop analysis of the pipelines in Tampa Bay Water s Pre-stressed Concrete Cylinder (PCCP) system was completed to prioritize pipelines for inspection based on relative condition and consequence of failure. Staff has negotiated a scope of services for condition assessment of the South Pasco Transmission Main with Pure Technologies U.S. Inc. RECOMMENDATION: Approve condition assessment services for the South Pasco Transmission Main with Pure Technologies U.S. Inc. COST/FUNDING SOURCE: $431,847.40/ Uniform Rate DISCUSSION: A desktop analysis of the pipelines in Tampa Bay Water s Pre-stressed Concrete Cylinder (PCCP) system was completed by AECOM to prioritize pipelines for inspection based on relative condition and consequence of failure. The South-Central Hillsborough Regional Wellfield Transmission Main had the highest priority, and was the first piping to be inspected as part of this program in April The Cypress Creek Wellfield Collection Main condition assessment was completed in July The South Pasco Transmission Main was constructed as multiple sections between 1971 and 2004 and has a medium risk of failure based on potential condition and risk of failure as determined by the desktop analysis. This pipeline is critical to Tampa Bay Water s system because it provides regional supply to Hillsborough County s Fawn Ridge and Lake Park delivery locations and to St. Petersburg s Cosme Water Treatment Plant and is the pipeline that conveys the South Pasco Wellfield supply through the regional system. Due to the length of this pipeline, staff intends to perform the assessment over two budget years. During FY miles of the Transmission Main will be assessed. There is currently only one vendor, Pure Technologies U.S. Inc. that provides condition assessment services for PCCP while keeping the line in service. Tampa Bay Water is using the terms, conditions and unit rates of the $5.8 million dollar Miami-Dade Contract BW9537-0/16 for pipeline condition assessment that was awarded February 15, 2012 and expires February 28, This is the same procedure used previously to assess the South- Central Hillsborough Regional and Cypress Creek Wellfield Collection mains. These attached scope of services will include a detailed plan for the assessment, insertion and extraction of the devices in the pipe, a detailed report of the damage and leaks found, a

2 Matt Jordan February 2, 2015 Page 2 prediction of the rate of future damage and failure, and a recommendation for the repair priority of any damaged or leaking pipe sections. The results of the condition assessment may lead to repair of the areas of poor condition. Recommended repairs will be included in a future renewal and replacement project for portions of the South Pasco Transmission Main. BACKGROUND: Buried pipelines comprise approximately 80% of Tampa Bay water s total agency assets. These pipes vary in age and material. Tampa Bay Water and many other Municipalities have had failures of Pre-stressed Concrete Cylinder Pipe (PCCP). PCCP is constructed with a steel cylinder wrapped with pre-stressed wires, which is coated and lined with cement. Failure of PCCP can occur due to corrosion of the pre-stressed wires, caused by low-grade materials of construction, or damage during original transport and installation. For example, the 20 mile long Cypress Creek Transmission Main was replaced in its entirety due to multiple pipeline failures and its critical position in the system. It would be extremely costly to replace all of the remaining 62 miles of PCCP in our system. Advanced condition assessment technologies have been developed over the years to help utilities identify where pipe future failures are more likely to occur. This will allow staff to target pipe section for repair or replacement rather than a more expensive replacement of the entire pipeline. Attachment

3 Suzannah Folsom, P.E. January 29, 2015 Tampa Bay Water 2575 Enterprise Road Clearwater, FL Dear Ms. Folsom: Pure Technologies U.S. Inc. (Pure) is pleased to offer our services to Tampa Bay Water (TBW) for pipeline assessment. We understand that TBW would like to assess the condition of the South Pasco Transmission Main (pipeline). The pipeline is constructed of prestressed concrete cylinder pipe (PCCP) and was installed in stages between 1961 and According to the plans provided by TBW, the pipeline to be assessed consists of the following diameters and lengths: South Pasco o 42-inch 30,500 linear feet or 5.78 linear miles (Note: 1.18 miles of this section is a Steel pipeline and only SmartBall will be analyzed). The total distances listed above are according to a preliminary review of the pipeline asbuilt plans. Accessibility to the pipelines will be confirmed following a field visit and the total distance of assessment will be confirmed after the analysis of the collected data. The pipeline will be inspected in one mobilization and are tentatively scheduled to occur after March 1, A detailed project plan will be provided to TBW upon acceptance of this scope of work. In the interim, the preliminary plan for South Pasco will be to insert the equipment through the access manhole at Station on the 42-inch main (C-42 drawings). Extraction is suggested at an access manhole located at 36-inch main at approximately Station (C-35 drawings). Details for the insertion and extraction shall be coordinated with TBW but if feasible, should include a temporary shut down and depressurization by TBW. 1 P a g e

4 This project will deliver to TBW the following: 1. The number of broken prestressing wire wraps in each inspected pipe section as well as any leaks found. 2. A performance curve for each pipe design class/soil depth combination for each pipe design with broken pre-stressing wires calculated using a 3-D non-linear finite element analysis 3. A structural engineering analysis detailing the repair priority for each pipe section with broken prestressing wire wraps. This report will provide TBW: A. Categorization of the structural damage found, allowing TBW to prioritize its rehabilitation program and allocate funds accordingly in an emergency and/or an annual basis. B. Information needed to extend the useful life of their pipelines using the information as a starting point for a root cause analysis if the pipeline is deteriorating. 2 P a g e

5 Cost Estimate Pure will deliver the electromagnetic inspection on the PipeDiver platform; leak detection will be performed on the SmartBall platform. TBW will be contracting Pure through an agreement Pure currently has with the Miami-Dade Water and Sewer Department (WASD). The terms and conditions associated with the assessment for TBW are based on the contract approved for WASD by the Miami-Dade County Department of Procurement Management (Master Agreement BW ). The cost for this project is referenced in Appendix B of this Master Agreement and is detailed in the table below. Service Quantity Unit Cost Total Cost PipeDiver/Smartball Mobilization & Planning 1 $85, $85, Inspection/Analysis/Reporting: 4.60 miles $69, $321, South Pasco SmartBall only 6,230 linear $4.00 $24, feet Total $431, TBW and Pure s responsibilities are detailed in the Master Agreement, Appendix A. We look forward to providing these specialized services. If you have any questions or concerns, please do not hesitate to contact me. Regards, Mike Garaci [email protected] 3 P a g e