Portfolio Category: Program & Construction Management

Inwood Forest Stormwater Detention Basin

Inwood Forest Stormwater Detention Basin Houston, Texas The project included the conversion of 226-acres of golf course fairways into regional detention basins through an interlocal agreement between Harris County Flood Control District and the City of Houston. This project represents the largest single-phase dirt moving effort in the Flood Control District’s 88-year history. It is transforming the site into 12 interconnected compartments, designed to mitigate impacts of future City of Houston local drainage improvements and help reduce flooding risks in a historically vulnerable part of the city. The project encompasses property located both east of Antoine and west of Antoine, with a total of 12 interconnected compartments. The project is currently in construction and will provide approximately 1200 acre-feet of storage to the White Oak Bayou Watershed. At a Glance 226 Acres $71 million Project Cost “This project represents a historic milestone for Harris County Flood Control District, both in scale and impact. Converting more than 226 acres into interconnected regional detention basins required close coordination between agencies, thoughtful phasing, and precise execution. Once completed, the system will significantly enhance flood resilience for the White Oak Bayou watershed and surrounding communities.” Mark Rotz, PE Project Manager Markets Land Development Services Land & Site Development

Vilano Beachfront Park

Vilano Beachfront Park Vilano Beach, Florida DCCM provided comprehensive concept planning, master planning, engineering, and landscape architectural services for Vilano Beachfront Park on Vilano Road in St. Johns County, Florida. The project aimed to seamlessly integrate the preservation of the natural coastal environment with the historic character of the area, creating a unique space for civic engagement and social recreation. Key features of Vilano Beachfront Park include a 1,300-square-foot pavilion that seats up to 190 people, designed to host concerts, educational events, and community gatherings. The pavilion incorporates rotating panels, which can be opened to provide ocean views or closed for events, and is equipped with performance lighting that is directed away from the Vilano Town Center, also considering turtle nesting season regulations. Additional upgrades to Vilano Beachfront Park focus on enhancing accessibility and visitor experience. These include new changing stations, a recreational area featuring a climbing play structure, new outdoor showers, renovated restrooms, and improved parking with restriping for ADA compliance. A mobimat provides accessible beach entry along the northern boundary, while updated dune walkovers, including an ADA-compliant viewing turnaround, allow easy access for all. Vilano Beachfront Park provides the only disability-accessible beach in St. Johns County, with a wheelchair-accessible path to the sandy beach and a wooden ocean-viewing ramp. These enhancements ensure an inclusive coastal experience for all visitors. At a Glance 1.7 Acres $109,000 Project Cost Inclusive Design Award, Florida Planning and Zoning Association Project Award Markets Land Development Buildings Water Services Land & Site Development Buildings & Places Program Management Water & Wastewater

24-inch Putah South Canal Emergency Raw Water Repair

24-inch Putah South Canal Emergency Raw Water Repair Benicia, California DCCM provided construction management and full-time inspection services for the City of Benicia’s 24-inch Putah South Canal Emergency Raw Water Repair Project. The emergency repair addressed a critical raw water transmission line extending from private property near Watt Court, beneath Interstate 80, and into City of Fairfield property. Due to the pipeline’s importance and its location within a major transportation corridor, the project required accelerated construction, careful coordination, and strict traffic control and safety oversight. Construction activities included traffic control along the westbound shoulder of Interstate 80, excavation of entry and exit pits, slip lining of an 18-inch fusible PVC pipe, hydrostatic testing, and full site restoration. DCCM supported the City throughout all phases of construction, providing daily field inspection, documentation, safety compliance monitoring, and traffic control oversight to ensure work conformed to project plans, specifications, and regulatory requirements. Construction management services included coordination with City staff, the contractor, property owners, and the design team; administration of submittals, RFIs, and change orders; cost and schedule monitoring; and preparation of progress reports and pay estimate recommendations. DCCM also supported project closeout by verifying punch list completion, reviewing record drawings, and delivering complete construction documentation. The project was successfully completed under emergency conditions while maintaining safety, quality, and schedule objectives. At a Glance $97,000 Project Cost Markets Water Services Transportation Water & Wastewater

42-inch Water Line Design, Segment 3 A1

42-inch Water Line Design, Segment 3 A1 Harris County, Texas DCCM provided final design and construction phase services for 14,000 linear feet of 42-inch water transmission line within a CenterPoint Energy electric transmission line corridor and easement. This water line is part of the West Harris County Regional Water Authority’s (WHCRWA) 2025 system, which will meet at least 60% of water demand with surface water. This is the latest project in a long history of working with WHCRWA to supply their surface water requirements. The project involved installing water lines in CenterPoint Energy’s electrical transmission line corridor for miles. Trenchless construction was required within 20 feet of truss towers and across busy roadways. Close coordination was maintained with the City of Houston and Harris County for permitting and the acquisition of record drawings. Collaboration with the design engineer ensured a proper connection to an 84-inch water line. Additionally, coordination with multiple petroleum pipelines and dry utilities in CenterPoint Energy’s corridor was necessary. At a Glance 42-inch Water Transmission Line $8.9 million Construction Cost Markets Municipal Surveying Services Water & Wastewater Program Management 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

US 59 South Reconstruction

US 59 South Reconstruction Rosenberg, Texas DCCM provided construction management, utility coordination, and roadway/utility inspection services for the construction and inspection of US 59 South from west of SH 762 to west of FM 2759 in Richmond. The transformation of the roadway included widening US 59 from a four-lane rural freeway to an eight-lane freeway, with two-way high-occupancy vehicle lanes and improved frontage roads. Also included in this project were upgrades to grading, cement-treated base, concrete pavement, a computerized transportation management system, bridges, a storm drain, signing, pavement marking, lighting, and traffic signals. DCCM provided support for the inspection of substructures and superstructures on this project. DCCM also assigned utility inspectors to verify the proposed alignment of utility relocation and to monitor the installation of utilities, working closely with owners and assigned subcontractors to ensure that the proposed utilities were placed per the approved plan and profile. At a Glance $162 million Project Cost Markets Transportation Services Transportation

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 $191 million Combined Construction Value 4 Direct Connectors Connecting SH 249 and SH 99 6 Toll Lanes Plus Two Three-Lane Frontage Roads 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

Verdera North Water Infrastructure Project

Verdera North Water Infrastructure Project Lincoln, California The project provides the City with adequate drinking water supply and storage to enhance the resiliency of the water supply system and accommodate growth. Together these improvements provide the northern areas of Lincoln with safe and reliable drinking water. In addition, the metering station and 42-inch pipeline will also be used to serve a large portion of western Placer County when Placer County Water Agency’s future Ophir Water Treatment Plant and 60-inch pipeline is connected to the metering station. DCCM provided program management, project management and design oversite services from inception through construction including developing project budgets, consultant selection (engineering and CM), preliminary design studies, environmental processing, project approvals, design oversight, bidding and award, SCADA, construction, and start-up. The major elements of this $25M project included: 1.3-miles of 42-inch CMLC steel pipeline 4,500sf pressure reducing/metering station 5-MG pre-stressed concrete tank 0.9-miles of 36-inch ductile iron pipe 933-feet of 16-inch PVC pipeline to high elevation customers Decommissioning a 7-acre municipal water storage pond Pad and yard piping for a future 5-MG tank Extensive oak tree mitigation planning Recreational trail around the project site At a Glance APWA Sacramento, CA Project of the Year “Environment (Water)” Award $25 million Project Cost Markets Water Municipal Services Program Management Water

Sir Francis Drake Corridor Rehabilitation

Sir Francis Drake Corridor Rehabilitation County of Marin, California DCCM provided construction management, inspection and public outreach services for the rehabilitation of Sir Francis Drake Boulevard between Highway 101 and the Ross town limits. The major traffic artery has a daily traffic load of 45,000 vehicles. The project objectives were to improve vehicle flow, transit operations, and pedestrian and bicyclist circulation and safety. The construction project scope included removal and replacement of 60,000 square feet of curb, gutter and sidewalk, 5,000 linear feet of post and cable fence, the installation of 8,500 linear feet of welded steel water line, 80 new water service connections, new signalization and video detection cameras at seven major intersections, new streetlighting, over 1 million square feet of cold planing, 25,000 tons of new asphalt pavement, traffic striping and markers, new and replacement storm drain piping and structures, 25,000 linear feet of new signal interconnection conduit and wiring. In support of these construction activities, we monitored contractor traffic controls, temporary intersection signalization, storm water pollution controls, quality assurance, and materials testing. At a Glance $18.1 million Project Cost Markets Transportation Services Program Management