SUE

FM 1097 Widening, Segments 1, 2, 3

FM 1097 Widening, Segments 1, 2, and 3 Montgomery County, Texas This project was a joint effort between Montgomery County and TxDOT. It involved widening an existing two-lane road with a dedicated left-turn lane into a four-lane road with a dedicated left-turn lane. DCCM was responsible for identifying utilities, coordinating design, reviewing permits and utility agreements, and overseeing relocation. Utility adjustments were needed for all utilities due to most right-of-way being taken on one side, and DCCM worked closely with right-of-way to prioritize parcel acquisitions so utilities could complete adjustments without delays. Utilities included Entergy, Kinder Morgan pipeline, CenterPoint Energy, numerous telecommunication lines, and the City of Willis water and wastewater. DCCM worked with the design team to mitigate utility conflicts that could be costly or require long lead times for adjustments. Our team set up several utility workshops among the roadway design team, the utility owner, and the construction area office to work through the details to protect the pipeline in place and avoid a costly relocation. Other coordination efforts included working with the design team on traffic control phasing to give utilities more time for adjustments while allowing the roadway contractor to continue working without delay. At a Glance $325,000 Project Cost $48 million Construction Cost Markets Power Services Utilities

Aerial view looking straight down at a multilane highway with a new crosswalk intersecting both directions of travel lanes

FM 2818 (Harvey Mitchell Parkway) Improvements

FM 2818 (Harvey Mitchell Parkway) Improvements College Station, Texas The FM 2818 (Harvey Mitchell Parkway) project in College Station showcases coordinated planning and innovative design to address regional growth and evolving transportation needs. DCCM led efforts with the City of College Station, TxDOT, Texas A&M University, and Easterwood Airport to improve corridor operations and support future expansion. DCCM’s scope included topographic surveying, ROW and easement identification, corridor and traffic analysis, conceptual alternatives analysis, environmental documentation, public involvement, subsurface utility engineering (SUE), and management of eight subconsultants. The team completed both schematic and PS&E phases, producing a geometric design from Wellborn Road to F&B Road and transitioning efficiently to construction documents by maintaining consistent staff and project management. A detailed topographic survey was completed for the 1.8‑mile corridor, covering an unusually large 80‑acre ROW. Prior baseline data from the 1970s and earlier DCCM utility surveys ensured accurate property and easement mapping. A comprehensive corridor and traffic analysis showed conventional intersections would not meet long‑term capacity needs. DCCM evaluated additional conceptual alternatives and identified a “superstreet” (Restricted Crossing U‑turn) as the preferred solution, reducing signal phases, improving traffic flow, and preserving flexibility for future controlled‑access upgrades. Environmental constraints along White Creek required careful grading and barrier design to minimize impacts on wetlands and floodplains. DCCM kept impacts below permitting thresholds and avoided additional ROW acquisition. DCCM also performed extensive SUE Quality Level (QL) B investigations covering more than 265,000 linear feet of utilities, revealing critical conflicts. Twenty-four QL-A test holes confirmed existing conditions and guided necessary design refinements. At the same time, additional QL-B work on side streets ensured a complete understanding of utility impacts despite tight timelines and traffic-control constraints. The project faced several significant design challenges, including a major underground electric duct bank that conflicted with proposed roadway and drainage improvements. Through SUE QL-A investigations and coordination with the City of College Station and TxDOT, the team adjusted the drainage while leaving the duct bank in place, thereby avoiding costly relocations. The late addition of the Jones‑Butler Road overpass required rapid schedule and design modifications without affecting the letting date. At a Glance 40% Reduction in Corridor Travel Times $57.6 million Construction Cost Markets Transportation Environmental Services Transportation Surveying Utilities

SH 249 (Tomball Tollway), Phases I and II

SH 249 (Tomball Tollway), Phases I and II Tomball and Montgomery County, Texas DCCM was contracted by the Harris County Toll Road Authority (HCTRA) as the Program Management Consultant (PMC) for the design and management of both preliminary and final project designs, as well as construction management and inspection services for Phase II. We developed a project feasibility assessment, which resulted in the SH 249 (Tomball Tollway), Phases I and II engineering feasibility report, and served as the basis for the final design. On its first day of operation, eager toll users doubled the projected 17,000 daily toll transactions, cutting traffic on the existing frontage road in half. Funded entirely with toll road revenue paid by drivers who choose to use the Harris County toll road system, the final construction will extend the toll road into Montgomery and Grimes Counties to SH 105, streamlining trips to and from rapidly growing Grimes County and College Station. Phase I: Spring Cypress Road to FM 2920 This project provided travelers with four main lanes in each direction and was constructed between the existing TxDOT northbound and southbound non-tolled frontage roads. As PMC for HCTRA, DCCM completed an aggressive 9-month design program to deliver plans, specifications, and estimates (PS&E) for HCTRA to bid and construct this phase. DCCM provided leadership, schedule adherence, quality assurance, and oversight to 17 consultants, completing the PS&E for four new toll lanes in each direction along a 6-mile stretch of SH 249, adding five new bridges, retaining walls, and a drainage system that mitigates flooding. Drivers may now bypass seven stoplights while the frontage roads remain toll-free. All milestone submittals were met on time, and the project was constructed in only 16 months and under three construction contracts. Phase I was open to traffic in April 2015 and is exceeding all revenue forecasts.  Phase II: FM 2920 to Spring Creek (Harris/Montgomery County line) Design preparations for Phase II began in October 2014 with design revisions to the TxDOT 2006 SH 249 Schematic. As in Phase I, DCCM was the PMC for the design of four-lane toll lanes in each direction, adding three-lane frontage roads on both north- and southbound approaches, five major bridges, flood-mitigating storm sewer detention, a collegiate practice field, and equestrian and bike trails. Services also included computing cut-and-fill quantities for roadway sections, concrete and reinforcement steel quantities for bridge deck pours, and payments for such pours on the contractor’s pay estimate. DCCM monitored the roadway excavation, subgrade preparation, concrete milling, embankment placement for abutments, installation of drill shaft and foundations, concrete beam placement, asphalt pavement placement, bent footings, column, cap pours, reinforced earth walls, 18- to 36-inch reinforced concrete pipes, and various concrete box culverts. Our team oversaw construction management and inspection services for this segment of the project.  Phases I and II of the SH 249 (Tomball Tollway) project included environmental investigations and permitting, survey/ROW mapping, utility identification and assessment, subsurface utility engineering, and hydrologic and hydraulic modeling and detention pond design. DCCM also provided construction phase services for Phase II and the direct connectors at SH 99 (Grand Parkway). Mainlanes, Phase I, Section 1 – Montgomery County MCTRA selected DCCM to prepare PS&E for mainlane and ramp construction for a 0.4-mile section of tollway north of Tomball, Texas. The project scope included roadway geometric design, traffic control plans, removal plans, drainage plans with both open and closed systems, SWPPP, cross-sections, general notes, specifications, and construction cost estimates. The DCCM team coordinated with both adjacent designers on the Montgomery County segment and with the design and construction teams of the Harris County segment to the south to deliver a synchronized product that minimized impacts to travelers and adjacent property owners and reduced overall project costs. At a Glance $101 million Phase I Construction Cost $99 million Phase II Construction Cost Markets Transportation Services Transportation Utilities Surveying Water & Wastewater

SH 249 (Tomball Tollway), Phase II and Four Direct Connectors

SH 249 (Tomball Tollway), Phase II and Four Direct Connectors Tomball, Texas DCCM performed construction engineering inspection services for the SH 249 (Tomball Tollway), Phase II, and the SH 249 (Tomball Tollway) and SH 99 (Grand Parkway) direct connectors projects. DCCM provided Field Engineers, Office Engineers, Critical Path Method, Sr. Scheduler, Construction Inspectors, and Utility Inspectors for both projects. DCCM also performed subsurface utility engineering as needed for fiber-optic cables (AT&T, Verizon), pipelines, and City of Tomball water lines. In addition, DCCM reviewed the detection of defects or deficiencies in the project contractor’s work. To support timely project completion, DCCM responded to the project request for information, coordinated and tracked submittals, reviewed and approved required project shop drawings, and provided other services requested by the Harris County Toll Road Authority. SH 249 (TOMBALL TOLLWAY), PHASE II CONSTRUCTION The project included the construction of six toll lanes and two three-lane frontage roads, including grading, embankment, drainage, structures, stormwater detention, signing, cement-treated base, stormwater pollution prevention plan, tolling infrastructure, a computerized transportation management system, and continuously reinforced concrete pavement. SH 249 (TOMBALL TOLLWAY) AND SH 99 (GRAND PARKWAY) DIRECT CONNECTORS The project included the construction of the SH 249 (Tomball Tollway) and SH 99 (Grand Parkway) four direct connectors and approaches, including traffic control, earthwork, grading, paving, structures, retaining walls, drainage, illumination, signing, pavement markings, an intelligent transportation system, and cross-sections. At a Glance $99 million Phase II $92 million Direct Connectors Markets Transportation Services Transportation

IH 45 South Expansion

IH 45 South Expansion Galveston County, Texas The expansion of IH 45 South in Galveston County was designed to widen the interstate and improve mobility in a region that has seen continuous growth in recent years. DCCM provided utility relocation and inspection (including water line, communication cable, and gas line), grading, concrete pavement, asphalt-stabilized base, cement- and lime-treated base/subgrade, bridge structures, storm sewer, and detentions. Construction of the widening of a freeway facility included grading, concrete pavement, asphalt-stabilized base, cement-treated base, lime-treated subgrade, asphalt concrete pavement, bridge structures, storm sewers, detention ponds, retaining walls, signing, pavement markings, traffic signals, continuous lighting, and a traffic management system. DCCM was selected to perform utility coordination, subsurface utility engineering, and utility inspection for the entire project. DCCM provided utility coordination and relocation for Frontier, AT&T, Comcast, CenterPoint Energy gas, Texas-New Mexico Power, and Phonoscope. DCCM performed subsurface utility engineering to identify the existing 39-inch encased water line (City of League City) that hindered the construction of the drilled shaft and stone columns along abutment No. 1 on the SH 96 bridge widening. TxDOT also entrusted DCCM with reviewing and approving permit applications for the entire project’s proposed relocation. At a Glance $101.7 million Project Cost Markets Transportation Services Transportation

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