56th Street

Melissa Rozelle

56th Street over Middle Branch Black River

Project Details

As part of performing routine bridge inspections for the Allegan County Road Commission, LSE has inspected the 56th St Bridge over the Middle Branch Black River for several years. The existing structure is a single span steel I-beam bridge with a concrete deck on concrete abutments. The concrete deck was experiencing significant cracking. Additionally, the stream bottom was beginning to scour beneath one of the abutments. The combination of these as well as corroding of the steel beams warranted a structural review. A load rating analysis confirmed the structure was only capable of safely carrying reduced loads. The structure was rated in poor condition.

With the deteriorating condition of the bridge, LSE applied for funding for the replacement through the Local Bridge Program on behalf of Allegan County. Upon receiving funding, the road commission selected LSE to design a replacement structure.

The new structure consisted of prestressed concrete I-beams on pile supported curtainwall abutments. Adjustment of the road profile was necessary to meet current highway standards, so reconstruction of the approach roadway was included in the design. Existing conditions indicated a solution to drainage issues was also necessary, thus drainage structures were proposed at the low point.

LSE continues to perform routine inspections of the 56th St bridge to monitor deterioration as well as to provide scoping of maintenance or preventative measures for the Road Commission.

Client

Allegan County Road Commission

Value

$1,026,538.31

Location

56th Street over Middle Branch Black River

Shelby Road

Melissa Rozelle

Shelby Road over Stony Creek

Project Details

The bridge on Shelby Road over Stony creek was a 3-span steel I-beam built in 1936. Since LSE began inspecting for the Oceana County Road Commission, the bridge had been progressively deteriorating. A load rating analysis indicated the structural capacity was reducing and would soon no longer support the heavy recreational traffic headed up to Silver Lake Sand Dunes. LSE worked with the road commission to seek funding through the Local Bridge Program. Once the structure was selected for funding, design and construction were scheduled.

LSE was selected to develop a design for a new structure. We proposed a single, 100-foot span consisting of prestressed concrete I-beams on pile supported curtainwall abutments. This design addressed a number of issues. Current AASHTO standards would be met, environmental requirements would be met, and drainage issues would be remedied, in addition to a new structure.

The road commission chose LSE to perform full construction services as well, including engineering, inspection, testing, and documentation. Field staff worked closely with the contractors to ensure the final product matched the design and met construction standards, and to address unforeseen site complications. One such complication was an excessive amount of groundwater at the bridge, unknown until the existing structure was removed. Once a solution was found to relieve groundwater and groundwater pressure, the contractor was able to complete the construction of the new road and bridge.

LSE continues to perform routine inspections of the Shelby Road bridge, including an initial post-construction inspection, to monitor deterioration of construction materials and keep the road commission informed of maintenance needs.

Client

Oceana County Road Commission

Value

$1,397,880.04

Location

Shelby Road over Stony Creek

Wise Road

Melissa Rozelle

Wise Road over Flat River

Project Details

For years, LSE has been performing Routine Bridge Inspections for the Road Commission for Montcalm County, including the Wise Road bridge over the Flat River, just west of M-91 in Greenville. The structure was a 4-span bridge with a nail-laminated timber deck on timber pile bents and abutments, built in 1978. As the bridge aged, the timber deteriorated. As the timber degraded, Load Rating Analysis proved the structural capacity was reducing, down to just 20 tons at it’s lowest. Not only was the bridge deteriorating, the roadway alignment proved unsafe as several car crashes occurred damaging the bridge railing and resulting in fatalities. On behalf of the Road Commission for Montcalm County, LSE sought funding to eliminate this safety hazard, sources included Local Bridge Program, Highway Safety Improvement Program, Small Urban Program. These funding sources provided not only a new bridge, but also pavement improvements from Youngman Road to M-91, a total of 1.48 miles. 

The design of this project included many different aspects:

  • Bridge design – 120’ span, 60” Bulb-tee beams, cantilever abutments on pile supported footings
  • Hydraulic analysis – River analysis of the Flat River, Road and site drainage
  • Meeting the many environmental requirements – DEQ (EGLE), FWS, SHPO, etc.
  • Design of several segments of different road sections – reconstruction, crush & shape
  • Curve layout and associated superelevation – meeting design speed requirements
  • Sign and pavement marking updates – to match current standards or improved layout
  • Driveway relocation and associated permits,
  • Maintenance of detoured traffic,
  • Development of special provisions for non-standard items

Road or bridge designs are complicated enough, but the length and alignment of Wise Road added complexity to the design. Many of those challenges also presented themselves in construction.

LSE was also selected to perform construction services. Construction Engineering, Inspection, and Testing services were required to ensure standards were met. Significant challenges on the Wise Road project included springtime flooding, unexpected groundwater, and superelevated grades. The team worked closely with the contractors to ensure a quality, long-lasting product for the residents of Montcalm County.

LSE continues to perform routine inspections of the Wise Road bridge to monitor deterioration as well as to provide scoping of maintenance or preventative measures for the Road Commission.

Client

Road Commission for Montcalm County

Value

$2,189,982.80

Location

Wise Road over Flat River