SECTION I – PROJECT DESCRIPTION There are approximately 816 Grade 3 pipe segments (over 401,893 ft) and 180 Grade 3 manholes needing to be reevaluated. Sewer pipe sizes generally range from 30 inches to 60 inches in diameter. Manholes include standard pre-cast concrete manholes, brick manholes and cast-inplace junction structures. The manholes vary in depth and have different corrosion protection materials, including PVC-lining and epoxy coating. SECTION II – SCOPE OF WORK The intent of this project is to provide an understanding of the current conditions of the sewer system, including identification of existing or potential structural and operational concerns that could impact system functionality, environment and/or public health and safety. The Assessment scope for this project will include, but not limited to: • Conduct visual inspections: prioritize pipe inspections, perform manhole inspections, perform pipe inspections, identify defects in accordance with NASSCO standards, perform condition evaluations of pipelines and manholes, and coordinate all activities with the City. • Conduct NASSCO certified review of field inspections, including review of Panorama and conventional CCTV inspections, preparation of an assessment database, assignment of NASSCO defect coding and ratings, and preparation of defect logs for each manhole-tomanhole pipe segment. • Services may include programming, prioritizing, preparation of documents for permitting and/or clarification, purposes, collaboration with contractor for rehabilitation solutions. • Evaluate the inspection data and identify areas of concern: review and evaluate field work data, code and grade defects based on the field data, assign a rating for each manhole and pipe segment, assign impact categories, and determine a rehabilitation rating level for each pipe segment. • Develop rehabilitation recommendations and prioritize projects: identify rehabilitation and failure impacts, create a prioritized program for pipe and manhole rehabilitation, and prepare planning level estimates of construction and design costs for each recommended rehabilitation/replacement project. • Recommend time frames for future condition assessments and monitoring of the system pipelines and manholes. • Prepare a final condition evaluation and assessment report, including rehabilitation ratings assigned to pipe segments, prioritized recommendations for pipe rehabilitation, logical construction projects for pipe rehabilitation, and planning-level cost estimates. The Design scope for this project will include, but is not limited to: • Evaluate existing documentation including assessment reports, videos, as-builts, and other investigative data and/or reports that may be available on pipe and manhole condition to identify viable rehabilitation alternatives. • Investigate and propose appropriate repair and rehabilitation methods. • Address any sewer capacity reductions caused by proposed rehabilitation methods • Provide rehabilitation or repair design to correct all sewer and manholes defects at identified project locations. • Assist the City in obtaining all necessary permits, easements, and approvals for the work. • Prepare and submit for review and approval, project documents (60, 90, and 100%) including cost estimates, construction drawings, technical specifications, and any special provisions.
