The Intercounty Connector (ICC) is a new 18-mile east-west highway corridor that will improve mobility and safety on local roadways, reduce travel times between I-270 and I-95/US Route 1, and enhance regional security, providing an additional evacuation route from the Washington Metropolitan Area. The entire corridor was divided into five separate contracts. Under two separate design-build contracts, KCI provided roadway, structural, drainage, traffic and environmental compliance services for design and construction of 14 miles of six-lane tolled highway. Work was performed in project offices with co-located consultant and owner staff. In lead design and coordination roles, our team oversaw the engineering staff of multiple consulting and contracting firms.
KCI provided an on-site Senior Policy Advisor to the MDTA throughout the construction and opening of the ICC Contracts A, B and C. Acting in support of the Executive Secretary and the Maryland Transportation Authority Management Committee, KCI staff developed and maintained a master schedule that coordinated the highway construction, staffing, toll equipment installation and public outreach efforts; developed written policy and regulatory language and guided the public outreach and hearing process for establishing the tolls; coordinated the opening activities for the opening of the both the first (Contract A) and second (Contracts B) segments of the ICC; and provided monthly written and oral updates on the ICC status to the MDTA Board.
KCI’s environmental management and construction oversight team on Contract A was tasked with developing a pioneering environmental compliance and monitoring program that would have a project-wide focus of avoidance and minimization. A critical factor from a regulatory perspective, the program helped ensure that the more than 800 permit and regulatory commitments were met. Through weekly environmental awareness training sessions, the team educated every person, whether design, regulatory, construction, or monitoring, who would set foot on the site without an escort—nearly 2,000 individuals—on environmental issues, requirements and protocols.
KCI was also responsible for conducting a variety of environmental analysis or any special studies including sediment transport, fish passage, turtle relocation, pH management, information management, workflow and electronic submissions using our custom designed web-based GIS/document management system (GeoFusion Center), dust and noise reduction, and turbidity processing. Our environmental team also provided environmental mitigation design and construction management for 13 stream crossings. Other work included reducing turbidity to an average of 50 NTU well below the new EPA NPDES construction discharge limits using advanced water treatment systems; developing a carbon sparging system for pH reduction from concrete pours; assisting in the design and monitoring of thermal reduction systems, daily inspection of erosion & sediment control devices, developing an eastern box turtle collection/relocation program as well as scientific collection of wildlife species including amphibians and reptiles; conducting yearly vernal pool assessments, remnant wetland assessments, threatened and endangered species, surveys of tree and herbaceous species, and surveying and developing management and eradication plans for invasive species.
KCI also led the drainage design for Contracts A, and was responsible for stormwater management which included thermal reduction design for sensitive environmental areas, redundant erosion and sediment control practice, open/closed storm drain design, bridge H&H design, and scour analysis.
It was balancing act—you want minimal impacts to the environment – wetlands, trees, the turtles and critters that live there—you want to keep the residents happy, but you have to build the project.
Kerry B. Rexroad, PEVice President, Regional Practice Leader
For Contract B, KCI served as lead roadway, drainage and lead traffic engineer and also provided structural design services. Our team provided management for the roadway and drainage design teams by holding weekly partnering meetings, coordinating submittal packages and schedules, providing sub-mission discipline review and coordination, quality control reviews, and addressing conformance commitments. Roadway design involved finalizing the horizontal/vertical alignments, typical section and cross-sections, interchange configuration including SPUI at MD 650, bike path, and intersection configurations for signals at the ramp termini. Continuous avoidance studies were performed to minimize impacts to trees, wetlands and community resources. KCI prepared design contract variance submittals, over-the-shoulder reviews and conducted design coordination meetings for addressing comments. Our team managed design of roadway elements and coordination with all of the design disciplines, including: water resources design for storm drainage, culverts, stormwater management and erosion and sediment control, and traffic engineering for signals, signing, pavement marking, and lighting. KCI provided structures design for two bridges (BR-25 225’ over ICC and BR 28 600’ over Northwest Branch) and utility relocation design services for Pepco and Verizon facilities.