InterCounty Connector (ICC) Contract C, Design-Build
Location: Montgomery & Prince George's County, Maryland
Client: Maryland State Highway Administration
MD 200, W of US 29 to E of I-95
JMT staff led significant elements of this Design-Build
transportation megaproject.
This project, one of the largest Design-Build contracts in
Maryland, included 3.8 miles of new roadway, Maryland Route 200, to
accommodate three highway lanes in each direction from west of U.S.
29 to east of I-95. Three new interchanges were designed at MD
200/US 29, MD 200/Briggs Chaney Road, and ICC/I-95. The work
also included the reconstruction and widening of 1.3 miles of U.S.
29 from south of Briggs Chaney Road to south of Fairland Road and
the reconstruction of 1.9 miles of C-D roads along I-95 from south
of MD 198 to north of MD 212.
The design of over 50 structures, including bridges, culverts,
retaining walls and noise barriers, was led by the JMT-provided
Lead Structures Engineer. This work included the design of
toll gantries, sign structures and high mast light poles,
coordination of four design consultants as well as the liaison
between the design team and MSHA, Maryland Transportation Authority
(MDTA) and the contractor. JMT's design work included 6
bridges, 3 noise barriers and 14 retaining walls. The bridges
included both steel girder and concrete beam superstructures
ranging from a 75 foot simple span to a 5-span, 1,218 foot curved
girder structure. Multiple plan packages were provided to
facilitate early construction activities such as pier footings and
ordering of long lead items such as structural steel. The
bridges, retaining walls and noise barriers included many different
aesthetic features unique to the project.
JMT provided H/H studies, analysis and design; open and closed
storm drain design; SWM and ESC analysis, computation and design;
H/H, SWM and ESC plans, reports and permits; and consultation
during construction for the MD 200 (ICC"C") mainline between the US
29 and I-95 interchanges as well as the Briggs Chaney Road
Interchange and the Old Gunpowder Road crossing. The SWM and
ESC plans were developed to allow multiple phases to reduce areas
of earth disturbance while allowing the contractor to meet his
schedule of activities throughout the project limits. The ESC
plans were coordinated with the MOT plans and utility relocations
to facilitate construction activities. JMT provided detailed H/H
design and scour analysis for Little Paint Branch, an
environmentally sensitive stream. JMT performed H/H design
for a temporary bridge crossing to be used as part of a haul road
during construction. JMT coordinated the designs with the
MSHA, the ICC Project Team and the Maryland Department of the
Environment (MDE) and performed much of the design at the "Hub
Office" facilitating the "over the shoulder" review process.
JMT obtained MDE permits and approvals (and related modifications)
from the MDE for the stream crossings, ESC and SWM.
MD 200, when opened, will operate as a toll facility. JMT
provided the Lead ITS/ETC Engineer who led the design of the
electronic toll collection (ETC) system and the traffic management
system for the project. The systems includes CCTV
surveillance; Dynamic Message Signs (DMS), toll rate information
signs (static panels with DMS inserts), ETC toll gantries and the
communication systems required to connect the field equipment to
the central operations center. Work included coordination
between the design team, MSHA, MDTA and the ITS/ETC integrator to
ensure compatibility and consistency with the overall ICC toll
system.
JMT provided lighting design for the entire project. Both
the US 29 and Briggs Chaney Road Interchanges were designed for low
level lighting using standard and decorative poles and
fixtures. Along I-95, high mast lighting was utilized
consistent with other areas of I-95. The high mast lighting
design included the MD 200/I-95 Interchange as well as the
interchanges at I-95/MD 212 and I-95/MD 198. The work also included
design of the power supply system for all lighting, toll gantries
and signing on the contract. This required constant
coordination with two utility companies for the many power drops
located throughout the project limits.
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