Portfolio Archive

Landscaped city hall courtyard with a fountain, benches, planters, and flowering trees.

City of Piedmont, Contract City Engineer

City of Piedmont, Contract City Engineer Piedmont, California DCCM has served as the City of Piedmont’s Contract City Engineer since 2009, providing comprehensive, on-call engineering services that support the City’s infrastructure, operations, and long-term planning goals. Our team delivers a full range of services, including staff augmentation, program and project management, design, construction management and inspection, and plan and map review. We support the City’s Capital Improvement Program (CIP) through planning, funding assistance, and ongoing program management, as well as technical studies such as pavement management, traffic, and drainage analyses. DCCM also plays a key role in development review and conditioning, encroachment permitting, and GIS-based asset management for the City’s sewer, storm drain, roadway, and striping systems. Our team prepares staff reports and regularly presents to City Council, Planning Commission, and other public committees, ensuring clear communication and informed decision-making. We coordinate closely with regulatory and funding agencies, including Caltrans Local Assistance, Alameda County Transportation Commission (ACTC), and the Metropolitan Transportation Commission (MTC), to help the City successfully navigate project approvals and funding requirements. In addition, DCCM provides Building & Safety services to support the City’s development and permitting processes. Reflecting Piedmont’s strong commitment to bicycle and pedestrian mobility, all transportation projects incorporate Complete Streets principles. Improvements have included sidewalk upgrades and replacements, ADA-compliant curb ramps, intersection safety enhancements such as bulb-outs and rectangular rapid flashing beacons (RRFBs), raised pedestrian crossings, enhanced striping, and ADA upgrades within parks, creating safer, more accessible infrastructure for the community. At a Glance 2009 Start of Contract Markets Municpal Services Program Management

Winding rural road leading toward a forested mountain with colorful fall foliage.

White County Referendum

White County Referendum Services White County, Georgia DCCM provided on‑call program management and advisory services to White County, Georgia, supporting the preparation of the Special Purpose Local Option Sales Tax (SPLOST) and Floating Local Option Sales Tax (FLOST) referenda. Working under the direction of the County Manager, DCCM served as a trusted advisor and extension of County staff, delivering targeted expertise and additional capacity throughout the engagement. DCCM supported each phase of SPLOST and FLOST pre‑referendum planning, guiding County leadership from early program development through ballot readiness. The team established critical timelines and milestones, prepared revenue projections, and collaborated closely with management, senior staff, and department directors to develop fiscally realistic and voter‑ready project lists. This work included defining project goals and scopes, validating cost estimates, and aligning proposed projects with anticipated revenues to ensure long‑term program viability. The team supported the preparation and coordination of required intergovernmental agreements, resolutions, and referendum documentation, while monitoring statutory deadlines, election advertising, and compliance requirements associated with the November 2024 SPLOST referendum and the November 2025 FLOST referendum. To promote transparency and informed decision‑making, DCCM assisted with the development and coordination of public education materials explaining the purpose, structure, and allowable uses of SPLOST and FLOST revenues. Services included guidance on best practices for public information efforts, clarification of allowable “do’s and don’ts” to distinguish education from advocacy, and support for online and presentation materials used on County platforms and at public meetings. In addition to referendum support, DCCM assisted the County Manager and Finance Department with preparation of the FY2025 proposed budget. This work included collecting and analyzing financial data, supporting revenue and expenditure assumptions, and assisting in the development of a balanced and realistic budget for consideration and approval by the White County Board of Commissioners. Through this flexible, on‑call engagement, DCCM delivered integrated budgeting and referendum support that strengthened White County’s financial planning efforts, enhanced intergovernmental coordination, ensured compliance with legal and procedural requirements, and helped County leaders communicate clearly and effectively with the community. Photos were provided by the County for Public Education materials At a Glance SPLOST Referendum FLOST Referendum Markets Municipal Services Program Management

Chattooga Referendum

Hall County Program Management Chattooga County, Georgia DCCM provided comprehensive program management and consulting services to support Chattooga County’s preparation for the 2026 Transportation Special Purpose Local Option Sales Tax (TSPLOST) and Floating Local Option Sales Tax (FLOST) referenda. Working under the direction of the Sole Commissioner, the DCCM team served as a trusted advisor and extension of County staff throughout the referendum development process. The team collaborated closely with County and municipal elected officials, senior staff, and department leadership to establish the overall scope, schedule, and key milestones necessary to advance the referenda. Services included developing revenue projections and distribution methodologies for both TSPLOST and FLOST, ensuring equitable and legally compliant allocations between the County and its cities. DCCM facilitated the development and refinement of the 2026 TSPLOST project list by coordinating reviews of the County’s capital improvement priorities and aligning proposed projects with anticipated revenues. The firm also supported negotiations among the County and municipalities, assisting with the preparation of intergovernmental agreements (IGAs) and associated resolutions for legal review and final approval. In addition, DCCM prepared all required documentation to place the referenda on the ballot, including IGAs, resolutions authorizing execution, election call documents, and statutory advertisements. The team coordinated the referendum schedule and monitored required election advertising to ensure compliance with state and local requirements. To support voter understanding, DCCM assisted with the coordination and development of educational materials explaining the purpose, structure, and eligible uses of TSPLOST and FLOST revenues. This included guidance on public information best practices, participation in the development of printed and digital educational content, and clarification of allowable “do’s and don’ts” related to referendum education efforts. These activities helped ensure that the County’s public outreach remained informative, transparent, and compliant with applicable regulations. Photos were provided by the County for Public Education materials At a Glance TSPLOST Referendum FLOST Referendum Markets Municipal Services Program Management

Substation 138-kV Transmission Line Improvements

Substation 138-kV Transmission Line Improvements Houston, Texas DCCM performed detailed structural engineering for the Substationb138-kV transmission line, 72-count ADSS single mode fiber cable, and the underground 72-count single-mode fiber routes and connections at both substations. The project included designing 3.7 miles of 72-count single-mode ADSS, bundled Suwannee ACSS, and 3/8-inch high-strength steel static, the design of several new concrete pole structures and extensively modified existing lattice structures. The team placed splice boxes along the transmission line. New drilled shaft foundations were designed for several of the new steel poles. We also performed construction support. At the end of both substation projects, we provided design and drawings for the Substation campus fiber routes to connect ADSS fiber to the telecommunications shelter and substation control rooms, created CAD plan and profile drawings, and CAD details for butt fusions splicing connections and fiber patch panels. At a Glance 2022 Project Completed 138kV Transmission Line 72-count ADSS Single Mode Fiber Cable Markets Power Services Utilities

Map showing pedestrian safety scores across the Shreveport-Bossier region.

Regional Active Transportation Plan (RATP)

NLCOG Active Transportation Plan Northwest Louisiana DCCM was selected by the Northwest Louisiana Council of Governments (NLCOG) to develop a Regional Active Transportation Plan (RATP) for the MPO planning area of Bossier, Caddo, DeSoto and Webster Parishes. This plan will be used as a tool by the NLCOG to improve upon its network of existing facilities and to develop new facilities that provide for improved and safer walking, bicycling, and other forms of micro-mobility for transportation and recreational opportunities. The Plan identified deficiencies and specific improvements to infrastructure with the goal of building a complete network for active transportation users, and will propose project selection criteria to prioritize current and future projects to make the best use of available funding sources and opportunities. To assess the existing conditions experienced by people walking and biking in the region, a comprehensive safety analysis for vulnerable users is evaluating the high-injury network where crashes disproportionately affect people walking and biking and makes recommendations for countermeasures to address specific issues. A latent demand analysis and analysis of previously collected public information will be used as inputs into the development of a safe and comfortable all ages and abilities (AAA) network free from barriers to access. This plan includes a broad outreach component, involving stakeholders, advocates and members of the public throughout the process to create a community-driven plan to make walking, bicycling, and other active modes of transportation safer, more comfortable, and more convenient throughout the region. At a Glance 2024 Completed $280,000 Fee Markets Transportation Services Transportation

Map showing key destinations, bus routes, and coverage areas for the NLCOG 2040 LRTP update in Caddo and Bossier parishes.

Long Range Transportation Plan 2040 Update

Long Range Transportation Plan 2040 Update Shreveport, Louisiana DCCM developed the LRTP for the Shreveport-Bossier City metropolitan area. The LRTP addressed regional and local transportation goals and objectives and encompassed all modes of transportation. The project included extensive public outreach and stakeholder consultation, including public visioning meetings; detailed socioeconomic projections based on a local, expertdriven Delphi Process; and a complete remake of the regional travel demand model (TDM), including a mode-choice component. The plan also addressed Transportation System Management and Operation (TSMO) strategies, multi-modal system deficiencies, safety concerns, and project travel demand for the horizon-year 2040. In addition to the traditional bike and pedestrian element, the project developed a Caddo Parish-specific bike plan that addressed unique needs within the community. DCCM conducted a series of scenario-based planning exercises to inform the plan development. DCCM also developed performance-based metrics used in a Project Selection Process (PSP) that addressed deficiencies identified in the MPOs triennial audit by FHWA. The PSP provided a link between the public visioning process, stakeholder input, and prioritization by the Technical Committee that addressed the multi-modal needs through the 2040 planning horizon. A new regional TDM was constructed based on the state of Arkansas’s statewide model interface and available local data. The new TDM was a state-of-the-practice four-step model that included a cross-classification trip generation model, a gravity model for trip distribution, a mode choice model to split person trips by mode, and traffic assignment by time of day. The TDM included a feedback loop, intersection delay, and advanced reporting features. At a Glance $839,000 Project Cost Markets Transportation Services Transportation

Construction site with graded earthwork and a stabilized waterway along a natural area.

Houston Country Club Holes No. 8 and No. 10 Bank Stabilization

Houston Country Club Holes No. 8 and No. 10 Bank Stabilization Houston, Texas DCCM was contracted by the Houston Country Club to provide engineering services for the channel slope repair on the south bank of Buffalo Bayou (HCFCD Unit No. W100-00-00) along the golf course fairways of holes 8 and 10. The project was previously designed by another firm and partially constructed but never closed out due to channel bank failures associated with a deep geotechnical failure below the slope. DCCM and contractor, BRH-Garver, as well as a geotechnical consultant, Professional Service Industries (PSI), and developed a structural solution with closely spaced drilled shafts to stabilize the failed channel slopes and to prevent future channel bank failures. The project consisted of two separate stretches of bayou being repaired. For one alignment, we performed a slope up from the existing bench and lower the top of bank. For the other channel section, DCCM added a variable height wall to be able to match the existing top of bank. The limits of the channel repair work was 1,225 feet along the fairways of hole 8 and 850 feet along the fairways of hole 10 for a total distance of 2,750 feet. The scope of services included the following: Designing the structural elements required to establish a stable slope system Coordinating the design and details of construction with the design/build contractor and the owner’s representatives Coordinating with PSI geotechnical engineers for a design of a stable slope system Preparing plans, specifications, and estimates (PS&E) Preparing hydrologic and hydraulic (H&H) impact analysis report Obtaining applicable signatures and permits from City of Houston and Harris County Flood Control District (HCFCD) Issuing a Letter of Map Revision at project completion Preparing as-built construction documents to finalize City of Houston and HCFCD permit requirements As a result of teaming with a local geotechnical firm, a deeper global failure was discovered at the location of the failures. A previously unknown slickenside soil layer was encountered at a depth below previous project borings. DCCM resolved this problem by extending drill shafts below this layer of weakened soil immobilizing the failure. At a Glance $10M Construction Cost 2,750 Feet of Channel Repair Work Markets Water Services Water & Wastewater

Stormwater drainage channel with concrete slopes, standing water, and surrounding vegetation.

Little Cedar Bayou Improvements, Phases I and III

Little Cedar Bayou Improvements, Phases I and III La Porte, Texas Phase I: DCCM provided preliminary engineering, final design, and construction phase services for improvements to the Little Cedar Bayou inline detention basin. Improvements were required to reduce negative impacts to the downstream watershed after major storm events. Key design and permitting features included: Adding 220 acre-feet in storage volume Land acquisition A reinforced concrete control structure at the crossing of SH 146 Harris County Flood Control District approval USACE permit for mitigation of impacts to regulatory waters Phase II: DCCM provided preliminary design, final design, and construction phase services for 2,500 feet of channel widening improvements in La Porte. The channel widening passes through residential and commercial areas. The project allows this section of Little Cedar Bayou to handle major storm events without negative impacts to the downstream watershed. Services included the following: Land acquisition allowing for widening the channel right-of-way (ROW) from 60 feet to 140 feet Design elements incorporated backslope drains, riprap, grade and slope protections, and new storm sewer outfalls Funding for the project was administered through the Texas GLO. USACE permit Coordination with Harris County Flood Control District and USACE. Changes in USACE’s policy occurred during the project regarding the process for obtaining USACE permits. DCCM proactively met with USACE and modified the proposed channel design to incorporate the use of natural stream design techniques. USACE approved the permit for this project as a result of DCCM’s early coordination. The initial project schedule was maintained throughout the project duration. This project successfully provided flood reduction in adjacent and upstream neighborhoods. At a Glance $1.4M Project Budget 220 Acre-Feet Storage Volume 2,500 Channel Widening Markets Water Services Water & Wastewater

Aerial view of a winding creek bordered by dense trees, sandy banks, and natural vegetation.

Collins Park Erosion

Collins Park Erosion Houston, Texas DCCM was selected to study and provide remedial measures to reduce erosion of the north banks of Cypress Creek (K100-00-00) adjacent to Collins Park. Cypress Creek, within the project limits, is a natural channel migrating to the north and undermining an asphalt trail owned and maintained by Precinct 4, a corridor parallel to K100-00-00. Cypress Creek within this reach does not have backslope swales or interceptors; significant uncontrolled sheet flows in the project area are found to increase erosion and rilling along the banks of K100-00-00. DCCM quantified the impacts of the sheet flows and identified design solutions. The Precinct 4 trail is a public facility. Therefore, the project is sensitive to public interest, and we have approached it with this in mind. Within the project area, there is a 92-inch outfall with a large cast-in-place junction now located in the beds of K100-00-00. The 78-inch outfall has been undermined and disconnected from the manhole, and there is concern about additional erosion around this large manhole, which could cause future issues. DCCM successfully conducted detailed field investigations and provided prompt engineering services, addressing the erosion issues by regrading the slopes and adding stone toe protection and rip rap around the outfalls. This design economically addressed the infrastructure concerns providing a long-term solution. At a Glance $220,000 Project Budget Markets Water Services Water & Wastewater

June Lake Storage Tank in Spring Hill, Tennessee, surrounded by trees and gravel access.

Lake June Phase 1 – Pump Station

June Lake Phase 1 – Pump Station Spring Hill, Tennessee June Lake is a premiere mixed-use development located on nearly 800-acres at the gateway to the City of Spring Hill, Tennessee. Located adjacent to I-65, June Lake is fully entitled for 2,900 homes, 3.9 million SF of commercial office space, 1.3 million SF of retail and restaurant space, and 400 hotel rooms. DCCM was contracted to design and permit the water and sewer infrastructure for the development, including the Phase 1 sanitary sewer lift station. The lift station was designed to manage a peak demand of 604 gpm, with a total dynamic head (TDH) of 70.2 ft. The design was complicated by the force main having to overcome two separate high points. Ultimately, a steady-state analysis determined that the water column within the force main would start to separate at Station 14+00 and become gravity flow at Station 14+40. The lift station has a 10-ft diameter wet well and utilizes duplex 50-horsepower suction-lift Gorman-Rupp pumps. The station is equipped with an emergency bypass quick-connect fitting and valving that allows City maintenance equipment to continue to manage the demand if the pumps are offline. Services included survey, engineering design, permitting, and construction administration. At a Glance $85,000 Design Cost Markets Water Surveying Services Water & Wastewater Surveying

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