Agenda - Parks and Recreation Commission - 02/13/2014

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C. Preliminary Design 1. Field Survey - Initiate the field surveys and mapping for the affected areas. For activities requiring work on land not controlled by the City, the Consultant will obtain the necessary written permission to enter the premises. The Consultant will plan and provide any required traffic control for the survey, testing, or design. • Depict topography, physical features and utilities on the base mapping along with existing right-of-way and property ownership. Prepare a survey control map that depicts locations of any project monuments. All work of surveying and installation of monuments shall be in accordance with City requirements. Produce a planimetric map of the project area. Features located will include, but not be limited to, surface and subsurface drainage features, inlets, ditches, lawn irrigation, signs, fences, curbs, walls, driveways and/or curb cuts, sidewalks, and edges of pavements (asphalt and concrete), trees, etc.. 2. Geotechnical Engineering: Investigate site soils and compile information in a draft report. The report shall include: • Bridge foundation type discussion and recommendations • Bearing values and recommended pressures for wall and paved surface designs • Identification of areas of potentially contaminated soil 3. Structural Design: A Structure Type Selection Report, as prescribed by the MnDOT Bridge Design Manual, will be provided for the bridge. It shall contain such information as: • Discussion of various bridge structure types • Comparative merits and deficiencies of each type, including aesthetic considerations • Constructability issues related to each type • Maintenance issues related to each type (to include roof systems, snow removal techniques, and wind screening) • Costs of each structure type, including life -cycle costs, incorporating maintenance • • and repair Recommended Structure Type Fabrication / Erection/ Phasing plan 4. Additional Structural Design Requirements: • Identify bridge substructure elements within roadways that will require design for a impact load if a properly designed crash barrier is not provided between the roadway and the substructure, per MnDOT requirements. • The bridge superstructure will also need to be evaluated for a impact load that would theoretically result in the failure of lower bridge elements in such a collision. This is to assure that the overall bridge design has redundancy, and will not collapse as a result of the failure of a major bridge element. Raising the bridge clearance will not exempt the bridge design from this design requirement. • Details for restraining the bridge at its supports will be required, to accommodate a impact in proximity of the bridge bearings. Details that need to be considered in the design are side walls or tie -down devices at the bridge supports, should the bridge be dislodged from its bearings. RFP 5 Mississippi Skyway