Title
PROFESSIONAL ENGINEERING SERVICES AGREEMENT WITH GIBBS & OLSON FOR BEECH STREET BOX CULVERT REPLACEMENT DESIGN
COUNCIL INITIATIVE ADDRESSED:
Provide sustainable water quality and environmental infrastructure
CITY ATTORNEY REVIEW: REQUIRED
SUMMARY STATEMENT:
Staff has identified the need to replace the existing Beech Street drainage box culvert from 21st Ave to 27th Ave due to aging and rotting timber structure underground. The box culvert is approximately 2,600 linear feet in length and is located in the 40-foot wide median along Beech Street, with 7 street crossings.
The Highlands Neighborhood Revitalization Plan completed in 2008 included a concept for a pathway and a water quality swale in the Beech Street median. In November 2011, the City hired the firm Berger-ABAM to develop conceptual designs to replace the box culvert, evaluate the potential for low impact development concepts manage runoff, evaluate options to enhance the Beech Street median, and participate in public outreach in the Highlands neighborhood community. This evaluation included a concept to remove the box culvert and convert the median to an open ditch conveyance system with landscaping and neighborhood amenities. After evaluating the surface and pipeline hydraulic grades in the area, and holding neighborhood meetings, the concept of open drainage was determined to not be feasible, and the neighborhood was opposed to providing amenities on the median due to safety concerns. The conclusion was to replace the existing box culvert with new underground pipes. Due to construction impacts, this project may result in the installation of a number of new accessible sidewalk ramps.
In accordance with state law, staff selected Gibbs & Olson as the most qualified firm and negotiated a scope of work and cost to provide design services as outlined in the proposed scope of work.
FINANCIAL SUMMARY:
The estimated cost of the professional services agreement is $425,660, which will b...
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