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Architecture

The Willett, Hofmann & Associates, Inc. Architectural Department is qualified to provide a wide range…

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Civil Site Design

Willett, Hofmann & Associates, Inc. Civil Site Engineering staff are experienced in and capable of…

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Land Surveying

The Willett, Hofmann & Associates, Inc. Land Surveying Department provides ALTA/ACSM surveys, boundary and property…

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Structural Engineering

With four licensed Structural Engineers on staff, and the support of an experienced technical staff,…

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Transportation Engineering

The Willett, Hofmann & Associates, Inc. Transportation Department provides engineering services for design, construction and…

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Water & Wastewater Engineering

Today’s increasing drinking water and water quality standards require investment in education and technology and…

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Recent News

JoDaviess County, Illinois – Council Hill Road over the Galena River
Willett, Hofmann & Associates, Inc. provided Phase I and II engineering services for the rehabilitation of a three span (56’:83’:56’) precast prestressed concrete deck beam bridge on spill-thru abutments, and fixed reinforced concrete piers originally constructed in 1970. Work consisted of the removal of the existing precast prestressed concrete superstructure, and the top portion of solid pier stems and abutment caps. The top portion of the solid stem reinforced concrete piers were built back up along with new abutment caps to support the new precast prestressed concrete deck beam superstructure. Stone riprap was placed around the base of the solid pier stems to help mitigate the scour.
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3 days ago  ·  

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WHA was retained by Civil Constructors Inc. to prepare a deck removal plan for the I-180 Bridge over the Illinois River near Hennepin, IL. Civil is removing and replacing the reinforced concrete bridge deck on the 15-span, 3100 foot long bridge. They requested analysis of the existing deck and beams for the proposed equipment and personnel loading utilized during the removal operation. WHA performed the analyses for various equipment combinations required to remove the concrete parapet rails, saw cutting, and removing sections of the deck. WHA also worked with Civil on equipment location restrictions in critical span areas. The final product for field use was a set of plans detailing the equipment location restrictions, deck removal sequencing, and maximum allowable loads. The loads included equipment weights, concrete section weights being handled by the equipment, and weight of temporarily stored materials to be hauled off the bridge. WHA also designed platforms to support personnel and a mini-excavator needed for cleanup in areas where the deck slabs had been removed. ... See MoreSee Less

4 days ago  ·  

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