City Council Meeting


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  F.2.k.       
Meeting Date: 04/19/2022  
Contact: Elizabeth Quilici, City Engineer

COUNCIL ACTION
Motion by Councilmember Dr. Dinah Marks with a second by Councilmember Letitia Hughes to approved as presented, Motion passes 7-0.
AGENDA ITEM:
Consider authorizing the City Manager to negotiate and execute a professional services contract with GWC Engineering, L.P. in a not-to-exceed amount of $57,958 for the design of a sewer infrastructure erosion project located at 109 Methodist Way
BACKGROUND:
The property is located at 109 Methodist Way, south of Heath Creek, with the privately-owned property limits going up to the center of the creek. The City has a sanitary sewer easement for its sewer main line along the south embankment of Heath Creek Branch, between the existing Methodist Care Center building and the creek.  

After construction started at the Methodist Care Center, staff and the developer observed erosion within the existing sanitary sewer easement. The erosion is likely attributed to tree removal along the embankment, construction activities, and heavy rain events. Currently, significant erosion has occurred along the south embankment of Heath Creek Branch, progressing up the slope and threatening to damage or undermine the existing sewer line and connecting manhole running parallel to the creek. These severe existing conditions have created a need for a permanent erosion control solution to prevent damage to the City's infrastructure.
FINDINGS:
Staff has researched options to control the erosion and protect the sewer main line within the sanitary sewer easement. Staff obtained three design and construction proposals for the impacted area. A gabion wall structure is the lowest cost option to stabilize the City's infrastructure with an anticipated construction cost of $255,000. Due to the lower estimated cost of construction, staff is recommending the solution consisting of a tied-back gabion erosion control structure. 
FINANCIAL IMPACT:
Funding for the design and construction for this project is available in the Drainage Improvements Fund. 
RECOMMENDATION:
Staff recommends that the City Council authorize the City Manager to negotiate and execute a professional services contract with GWC Engineering, L.P. in a not-to-exceed amount of $57,958 for the design of a sewer infrastructure erosion project located at 109 Methodist Way.
MANAGEMENT REVIEW
Attachments
Project Layout
Exhibit A_Scope of Services
Erosion Photos at 109 Methodist Way
GWC Engineering Fee_Base Bid
Construction Estimate_Base bid


    

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