Res 2012-141 - Laserfiche WebLink

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Proposal for Professional Engineering Services Sessom Creek Erosion Remediation Evaluation segments, erosion at tributary confluences and storm drain outfalls, and excessive bank erosion and scour. Stream Erosion Assessment — RPS Espey will document erosion issues along Sessom Creek at discrete locations up to Peachtree Street as identified in the field and rank them based on size and severity. Severity will include consideration of the threat to properties, structures, municipal infrastructure and potential threat to water quality and habitat. RPS Espey will also determine approximate limits of existing right of way and easements at each location. RPS Espey will review the ranking with the City staff and may adjust the ranking based on their input. RPS Espey will also discuss the likely options for remediation (e. g. grade control, slope toe protection, slope reinforcement, etc.). 3. Preliminary Design and Cost Estimating - RPS Espey will prepare conceptual designs of remediation measures (using natural channel designs when possible) and associated cost estimates for the top 12 discrete sites. This task will include consideration of constructability, access, property acquisition, etc. It will also include an estimate of the construction duration and permit requirements at each site. 4. Report and Presentation — RPS Espey will prepare a report that includes the information collected as part of this project, documents the ranking process and results and summarizes the preliminary designs that can be used for future budgeting and planning purposes as part of the City's CIP. DELIVERABLES The following deliverables are included within this scope of services: 1. Technical memorandum which includes initial assessment and ranking of erosion areas. 2. Report which includes preliminary design and cost estimate for up to 12 discrete remediation sites. 3. Presentation of the report at a staff meeting. Page 3 of 7 September 18, 2012 Revised October 9, 2012