The 2021 ACEC/Iowa Engineering Excellence Awards winning projects in the Special Projects Category:

Special Projects Grand Place Award (1st Place in Category)

Firm: WHKS
Client/Owner: City of Nora Springs, Iowa
Project: Mill Pond Pedestrian Bridge and Trail

The Mill Pond Park Trail and Bridge is a 700 foot, multi-use path with a two-span steel prefabricated bridge beginning at
Hooker Avenue North, crossing the Shell Rock River, and ending on the west side of the existing walking bridge in Nora
Springs. The bridge now unites two parts of the City, creating safer and easier passage for residents.
The rustic-looking steel truss bridge spans 360 feet (consisting of two 180 feet spans) and was designed to be
maintenance-free to provide for years of sustainable use. The bridge features an ADA-compliant walkway and houses
a central lookout platform for pedestrians to take in the scenic views of the Shell Rock River. Concrete walking trails
connect the bridge to the parking areas on both sides of the river. At night, the trail and bridge are illuminated with 57
approach trail lights and 33 bridge walkway lights allowing use of the trail and bridge year-round.
The Mill Pond Trail and Bridge project was accomplished in four phases:
Phase 1: WHKS performed a feasibility study that discussed preliminary hydraulics and trail design, alignment and
aesthetic options, timelines for design and construction, advantages and disadvantages of each option, and estimated
construction costs.
Phases 2 and 3: WHKS prepared the bridge Type, Size, and Location, and completed survey, hydraulic calculations,
geotechnical investigations, aesthetic details, and bridge/approach design.
Phase 4: WHKS completed construction observation, administration, and staking.
The plans and specifications were in accordance with the Iowa Department of Transportation Standard Specifications for
Highway and Bridge Construction, General Supplemental Specifications, and Supplemental Specifications.



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