Loading...
Item 9E Item 9E Approve a Professional Services agreement with RJN Group, Inc., to conduct a Sanitary Sewer System condition assessment in an amount not to exceed $227,200 Good evening Honorable Mayor and members of the City Council. This is Cristina McMurray, Deputy Director for Public Works, and I will be presenting a Professional Services agreement with RJN Group, Inc. for your consideration. 1 Requested Action Approve a Professional Services agreement with RJN Group, Inc., to conduct a Sanitary Sewer System condition assessment in an amount not to exceed $227,200 Staff requests that City Council: Approve a Professional Services agreement with RJN Group, Inc., to conduct a Sanitary Sewer System condition assessment in an amount not to exceed $227,200. 2 Sanitary Sewer System Condition Assessment Southlake’s wastewater collection system: Miles of pipe – 208.74 miles Manholes – 3760 Wastewater Lift Stations – 13 Service connections – 8,770 (8,737 active) Best Management Practice to re-evaluate every 10 years In 2007, the City contracted with RJN Group, Inc. to perform a comprehensive Sanitary Sewer Evaluation Survey (SSES). This study was conducted over a period of three years with the purpose of identifying any potential deficiencies in the City’s wastewater collection infrastructure.   Southlake’s wastewater collection system consists of 208.74 miles of pipe, 3,760 manholes, 13 wastewater lift stations and 8,737 active sewer connections. While the City’s wastewater collection systems in the southern basins are approximately 35 years old, and 18 years old in the northern basins, it is a best management practice to re-evaluate the integrity of the collection system approximately every ten years.   3 Sanitary Sewer System Condition Assessment Wastewater collection systems: Non-pressurized Gravity-flow pipeline networks Follows creeks Other drainage ways Infiltration Inflow Wastewater collection systems are, by design, primarily non-pressurized, gravity-flow pipeline networks. For that reason, defects in pipes and other system components are not readily apparent as they are in water distribution systems. In order to take advantage of the natural terrain, these gravity systems often follow creeks and other drainage ways. This placement makes them vulnerable to external groundwater pressure resulting in the infiltration of significant amounts of water where defects are present. Another source of inflow into the system results during rain events when manholes, cleanouts and other structures are subjected to flooding and standing water as well as any illicit connections from rain gutters. 4 Sanitary Sewer System Condition Assessment Corrective Items: Point Repairs on sewer mains Elimination of direct open access points Sealant between manhole cover and concrete structure Rehabilitation of deteriorating manhole structures Over the course of the last ten years, Wastewater personnel have worked to complete corrective action items identified in the SSES to maintain the wastewater system in good condition. Some of these corrective items include point repairs on the sewer main; elimination of direct open access points; installation of sealant between manhole cover and concrete structure; and rehabilitation of deteriorating manhole structures by applying an epoxy coating to deter corrosion from hydrogen sulfide and methane gases. 5 Sanitary Sewer System Condition Assessment Current condition assessment necessary to: Address CMOM Plan Gap Confirm remedied deficiencies identified back in 2007 Prevent inflow and infiltration (I/I) Manage the City’s treatment costs Cost avoidance In FY 2017, City staff worked with Freese & Nichols, Inc. to develop Southlake’s CMOM Plan. As part of the FY 2017 CMOM plan gap analysis, it is necessary for the City to perform a current condition assessment of the wastewater infrastructure to confirm corrective action has remedied any deficiencies identified back in 2007. The proposed study also includes temporary flow monitoring to aid the City in identifying areas of current inflow and infiltration concern. The intent is to identify these sources and correct them to manage the City’s treatment costs to TRA. therefore, this study may provide for cost avoidance of unnecessarily treating ground water from inflow and infiltration. 6 Funding FY 2017 CIP Project Account U0039 - $180,000 FY 2017 Utility CIP Residual Account - $47,200 Sanitary Sewer System Condition Assessment Funding for the Professional Services agreement with RJN Group, Inc., to conduct a Sanitary Sewer System condition assessment in an amount of $227,200 is partially available in CIP project account U0039 in the amount of $180,000. The balance to complete the assessment may be transferred from the Utility CIP Residual Account in the amount of $47,200 upon Council approval. 7 City of Southlake Strategy Map The City of Southlake provides municipal services that support the highest quality of life for our residents, businesses, and visitors. We do this by being an exemplary model of balancing efficiency, fiscal responsibility, transparency, and sustainability. C1 Achieve the highest standards of safety & security C2 Provide travel convenience within City & region C3 Provide attractive & unique spaces for enjoyment of personal interests C4 Attract & keep top-tier businesses to drive a dynamic & sustainable economic environment C5 Promote opportunities for partnerships & volunteer involvement Serve our Customers Manage the Business B1 Achieve best-in-class status in all City disciplines B2 Collaborate with select partners to implement service solutions B3 Enhance resident quality of life & business vitality through tourism B4 Provide high quality services through sustainable business practices B5 Enhance service delivery through continual process improvement B6 Optimize use of technology Provide Financial Stewardship Promote Learning and Growth F1 Adhere to financial management principles & budget F2 Invest to provide & maintain high quality public assets F3 Achieve fiscal wellness standards F4 Establish & maintain effective internal controls L1 Ensure our people understand the strategy & how they contribute to it L2 Enhance leadership capabilities to deliver results L3 Attract, develop & retain a skilled workforce L4 Recognize & reward high performers L5 Empower informed decision-making at all levels in the organization C6 Enhance the sense of community by providing excellent customer service and citizen engagement opportunities L6 Foster positive employee engagement CBO1 – Maintain a strong financial position and implement plans and policies to ensure future financial strength. CBO2 – Enhance mobility through aggressive traffic management initiatives and capital project implementation. CBO3 – Engage in thoughtful planning to ensure continued high quality development that is integrated well into the current built environment. CBO4 – Optimize the City’s commercial tax base by attracting high quality new businesses to reduce the tax burden on residential taxpayers. CBO5 – Improve quality of life through progressive implementation of Southlake’s Comprehensive Plan recommendations. CBO6 – Invest to maintain strong public safety to ensure a low crime rate and effective emergency response. Critical Business Outcomes Deliver on Our Focus Areas The approval of this Professional Services agreement links to the City’s strategy map relative to the focus area of Infrastructure. The specific corporate objectives that are met by these services are to (B2) collaborate with select partners to implement service solutions and (F2) invest to provide and maintain high quality public assets. 8 Questions? Rob Cohen – 817-748-8097 9 For questions concerning this item, please contact Rob Cohen at 817-748-8097. Thank you for your attention.