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Grade Separation Structures |
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MD Route 43
Whitemarsh Boulevard
Baltimore County, MD
This project consisted of the design of 3.75 miles of multi-lane urban
highway on a new location, modifications to 1 mile of I-695
(Baltimore Beltway), two interchanges, four major at-grade
intersections, four bridges (including two bridge replacements),
seven box culverts, retaining walls, at six locations and
relocation and restoration of a Class IV trout stream.
Design responsibilities included:
- Roadway design
- Structure design
- Sediment & erosion control
- Hydrology / Hydraulics
- Public meetings
- Utility coordination
- Right-of-Way
- Environmental issues
- Traffic control plans
- Stormwater management
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Structural design includes the following:
- Widening/replacement of the I-695 over Avondale Road dual 3-span bridges with single span plate girder bridge.
- New 3-span (120’, 222’, 120’) curved girder flyover bridge on MD 43 EBR over the I-695 outer loop.
- New 2-span (96’, 96’) plate girder bridge on U.S. Route 1 over MD 43.
- Six retaining walls along I-695 totaling 2,600’ in length and ranging in height from 5’ to 25’.
- One triple SPPA culvert extension, one single SPP culvert, one triple SPP culvert, two triple SPPA culverts along White Marsh Run.
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FA Route 2 (Illinois Route 3)
Madison County, IL
Project consists of relocation and completion of FA Route 2 in the City of
Alton, Illinois, consisting of 1.5 miles of four-lane highway with partial
access control. Also includes grade separation structure carrying FA 2
over railroad yard and at-grade intersections with city streets. Two-lane
connector to Broadway Street and one-way service drive along Front Street,
plus retaining walls at four locations are included.
Geotechnical engineering included the inspection of soil boring and
rock coring operations; laboratory testing including mechanical analysis,
moisture-density relationships, determination of Illinois Bearing Ratios,
unconfined compression, consolidation and triaxial compression; stability,
settlement and subgrade analyses; and foundation and construction
recommendations.
Estimated total cost of construction: $14,500,000.00
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