Transportation  >  Bridges

Bridges

ILLINOIS ROUTE 82 BRIDGE OVER THE HENNEPIN CANAL / GENESEO, ILLINOIS

We were selected by the Illinois Department of Transportation, District 2, to design a replacement structure for the bridge carrying IL 82 north of Geneseo over the Hennepin Canal.

The existing three-span bridge was deteriorating and IDOT had determined that it needed to be replaced.  Services included a complete hydraulic design, a Structure Geotechnical Report; Type, Size, and Location Study; and Final Plans, Specifications and Estimates.  We also completed a comprehensive Life-Cycle Cost Analysis to determine the optimal structure type for this location.

Since the Historic Hennepin Canal is a State Park, additional coordination with the Illinois Department of Natural Resources was a major part of the planning and design process.  It was imperative that the new bridge would safely accommodate a multi-use recreational trail.

Our staff worked closely with the Illinois Department of Transportation and the Illinois Department of Natural Resources to plan and design an aesthetically pleasing replacement structure for this special site which satisfied all of the stakeholders in this project.

ROCK ISLAND GREENWAY, KNOXVILLE CROSSING / PEORIA, ILLINOIS

The Peoria Park District teamed with us to provide Planning, Design and Construction Administration services for the Knoxville Crossing portion of the Rock Island Greenway Recreational trail in Peoria.

The planning phase included a SUE investigation due to the presence of numerous underground utilities and the study of crossing alternates including a tunnel and a bridge.

Design and construction included a two-span overhead structure with aesthetic treatments including formliners, stained concrete and ornamental lighting,  on both the bridge structure and on the MSE retaining walls at the approaches.

Phase III work included IDOT ICORS Documentation with Material Certifications.

SOANGETAHA ROAD BRIDGE / CITY OF GALESBURG, KNOX COUNTY, ILLINOIS

Train going under the Soangetaha Bridge in Galesburg, IL.

The 100-year-old existing bridge had deteriorated beyond its useful service life.  This roadway is the only means of access to the Soangetaha subdivision, country club and golf course.

We provided conceptual planning and engineering design.  Design included replacing the current bridge with a new bridge on a new horizontal and vertical alignment while keeping the existing bridge open to traffic. 

The project included bridge type comparison, a complete topographic survey, Bridge Condition Report, Preliminary Bridge Design and Hydraulic Report, geotechnical investigation, Project Development Report, bridge design, roadway design and construction documents.  

Multiple horizontal and vertical alignments were investigated to meet the requirements of the site. The design was influenced by the vertical geometry which was being dictated by the railroad requirements.  All planning and design was coordinated with and through the BNSF Railway.  Aesthetics was also an important factor in the design and a pedestrian walkway was also included on the structure.  

This project was unique in the fact that we completed all preliminary engineering (Ph I planning and Ph II design) in a 12 month period which is virtually unheard of in a project involving railroad coordination.  The experience of our design team in all phases of the engineering process resulted in this very timely completion.

Veterans Road Bridge / Fondulac Township, Tazewell County, Illinois

The 40-year-old existing bridge had deteriorated beyond its useful service life, and the vertical and horizontal geometry were deficient by modern standards.

We provided conceptual planning and engineering design.  Design included replacing the current bridge with a new bridge on a new horizontal and vertical alignment while keeping the existing bridge open to traffic to minimize inconvenience to motorists.

The project included a complete topographic and hydraulic survey, Bridge Condition Report, Preliminary Bridge Design and Hydraulic Report, geotechnical investigation, bridge and roadway design, construction specifications and bidding documents.

Multiple horizontal and vertical alignments were investigated to meet the requirements of the site. The design was complicated by the bridge being immediately downstream of the confluence of two waterways; with the flow in one of the waterways being controlled by an upstream dam and detention area.  Over 45 square miles drain into this waterway.

Wilhelm Road and Bridge / Peoria, Illinois

We performed Phase II structural engineering design and Phase III construction engineering services for a new connector road and structure on Wilhelm Road spanning a tributary to Kickapoo Creek.

Rapid growth in this area of Peoria created the need for an interconnected roadway network. The Wilhelm Road connector contributes significantly to the mobility through the area.

The new structure consists of three spans, measures 54’ wide across the deck (including a multi-use path), and 149’ back to back of abutments.  Geotechnical considerations included a sand drainage blanket design to alleviate pore pressure concerns during embankment construction.

Roadway improvements consist of new guardrail, concrete approach slabs, HMA paving, curb and gutter installation, seeding, pavement markings, and multi-use path.