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Consideration of request by Senior Civil Engineer for approval of an amendment to the professional services contract with Symbiont Science, Engineering and Construction, Inc. for stormwater modeling along Honey Creek, Proj No 4103
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Submitted by:
Maggie Anderson, Senior Civil Engineer
Department
Engineering
A. Issue
Approval to execute an amendment with Symbiont Science, Engineering and Construction, Inc. (Symbiont) to provide additional stormwater modeling of storm sewer outfalls discharging to Honey Creek.
B. Background/Options
In September of 2022, we entered in to a professional services contract with Symbiont for engineering services for stormwater modeling along Honey Creek. This work was being done in anticipation of the upcoming Honey Creek restoration project by the United States Army Corps of Engineers (USACE) and Milwaukee Metropolitan Sewerage District (MMSD).
As the USACE’s design work progressed we found it necessary to complete additional alternatives and refinements along many of the outfalls. Another outfall that is within City of Milwaukee but drains City of Wauwatosa storm sewers was added to the analysis.
The additional outfall size refinements, alternatives analyses, and new outfall require corresponding additional project documentation in the project report. The original contract included a summary technical memorandum but, considering the number of outfalls and their complexity, this deliverable is being changed to a report. The additional items are listed below:
• Rockway Place System Analysis - Alternatives: $1,400
• Size Existing Wauwatosa Outfalls - Refinements / Alternatives: $16,800
• Size Wisconsin Avenue Outfalls - Refinements / Alternatives: $19,200
• Update from a Tech Memo to a Report: $7,200
• New Outfall 19-111: $5,000
C. Strategic Plan (Area of Focus)
WELL MAINTAINED INFRASTRUCTURE: Repair and replace the City’s infrastructure at a pace that will ensure our infrastructure is in good repair within financial restraints of budgeting for generations
D. Fiscal Impact
The original agreement amount was $75,000. The additional scope items come to $46,900 for a total revised contract of $121,900. The budget for the stormwater modeling is $160,000 within Project 4103.
E. Recommendation
Authorize staff to amend the professional services agreement with Symbiont for a revised total contract amount of $121,900.