Eden Prairie’s Duck Lake Road Earns APWA-MN Structural Project of the Year
Duck Lake has been in existence since before 1940. It was improved in 1973 and functioned as a rural section causeway between Duck Lake and the westerly lobe. This narrow section of Duck Lake Road was overdue for reconstruction with a need for pedestrian facilities and improved stormwater management. Final design of a preferred alternative featured roadway widening, a trail section along the lake, and a box culvert connecting the two bodies of water; however, permitting through the watershed district and DNR would prove difficult, resulting in a complete redesign of the corridor, which now features a new 255-foot bridge crossing the lake and a new funding partner in the watershed district.
Bolton & Menk provided engineering services for the widening of the roadway through Duck Lake to provide improved lane widths and pedestrian accommodations on either side. Due to the effects of fill on lake levels determined as part of a hydrologic study, a bridge structure was proposed to mitigate impacts. The new structure proposed was a 255-foot by 47-foot haunched five-span continuous concrete slab with a pedestrian overlook and fishing pier on pile bents and integral abutments. Special considerations needed to be made for the overlook design and for the overall bridge behavior/pier stiffness analysis due to the large number of spans. Bolton & Menk provided project concept development; (non-standard, non-steel bridge design) preliminary and final bridge design; special provisions development and load rating analysis; geological and geophysical studies (via subconsultant); land surveying and engineering surveying; hydraulic and hydrologic studies; bridge construction inspection.
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