7A, County Road E Pedestrian Improvements

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5/22/2009 Page 2 accommodate a future wider bridge at CR E. Trail connections would also be constructed to tie the pedestrian bridge into the existing sidewalk to the east and shoulder to the west. City staff reviewed proposals submitted by the firms in its engineering pool, and is recommending Kimley-Horn and Associates, Inc. for this work. DISCUSSION Proposals were submitted by four firms in the engineering pool: Bonestroo, Kimley-Horn and Associates, Inc., SRF Inc., and WSB and Associates, Inc. Since we did not create a structural pool, firms with structural departments were asked to respond to our request for quotes. The proposal amounts are listed below: Consultant Alternative I Alternative 2 Bonestroo $97,268 $238,545 Kimley-Horn $32,360 $78,555 SRF $106,017 $145,060 WSB $37,400 $164,000 Staff reviewed the proposals for project understanding and staff experience as well as costs. Staff recommends Kimley-Horn and Associates, Inc. for this work. Kimley-Horn staff is experienced in bridge projects, including both improvements to existing bridges and new bridge construction. Kimley-Horn staff has worked on other projects that fall within Mn/DOT's jurisdiction, and is familiar with their rules and requirements on bridge projects. Kimley-Horn provided some technical assistance during a meeting with the Mn/DOT Bridge Office in March. City staff has had a positive experience with this firm and feels the proposal that has been submitted best meets the intent of the project and the City's needs. ADDITIONAL INFORMATION At the May 18 Worksession the City Council asked for additional information relating to this project. Lifespan of a standalone pathway bridge: With proper maintenance, the typical life of this type of bridge is expected to be about 50 years. Maintenance costs of a standalone pathway bridge: Assuming a concrete deck to accommodate snow plowing, maintenance would include: . Washing the bridge 1-2 times a year to keep the deck clean and free of dirt and other debris. · Depending on surface treatments (paint, aesthetics, etc.), repainting may be required every 10 years or so, at an estimated cost of$3,000-$5,000 · If any wood or other "soft" material is used on the bridge, this may need treatment or replacement every 5 years or so, at an estimated cost of$2,000 to $3,000 Does a standalone pathway bridge need to be fenced in? MnlDOT indicated that fencing is required to prevent objects from being thrown off the bridge; however, a full enclosure is not required.