Boundary Surveys
Topographic Surveys
Feasibility Studies
Site Investigation
Concept Plans
Regulatory Review Coordination
Preliminary Plats
Final Plats
Grading and Drainage
Storm Water Management
Erosion Control Plans
Storm Water Pollution Prevention Plans
Hydrologic and Hydraulic Studies
Floodplain Studies
Roadway and Parking Lot Infrastructure
Utility Infrastructure
Utility Services and Coordination
Construction Staking
Construction Engineering

Willett, Hofmann & Associates, Inc. Civil Site Engineering staff are experienced in and capable of providing both private and public residential, commercial, industrial, and governmental developments, providing services ranging from design, permitting and construction staking and observation of sites ranging from a single lot, to multiple-lots. Our staff is experienced in the design of storm water management and detention facilities, site grading, parking lots, roadways, entrances, storm and sanitary sewers, and water distribution for fire protection and domestic use. WHA staff works closely with our in-house Land Surveying Department staff and state and local agencies having jurisdiction over developments throughout the design process to ensure their design and platting standards are met, and provides layout and engineering services during the construction phase of the project.

Our continued investment in staff training and state of the art software combined with our past experience and diverse knowledge base produces successful, cost effective, constructible designs which enhance the surrounding area.


Harmon Park Drainage

Harmon Park Drainage A frequently flooded neighborhood in Rockford is a drain on the community and a safety concern. See how WHA helped Rockford control the stormwater. Download the details here!
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Much more than a professional services provider, WHA is a community advocate and regular newsmaker.  Keep pace with our people, projects and progress here.

Willett, Hofmann Wins ACEC-Illinois 2017 Engineering Excellence Awards
February 17, 2017

City of Rockford Projects Earn Award  more...

WHA Wins Award
January 9, 2017

APWA Awards  more...