Traffic

2020 Multi-Street Reconstruction

2020 Multi-Street Reconstruction Pasadena, Texas DCCM provided preliminary and final design, bidding, and construction-phase services for reconstructing 12,220 linear feet of neighborhood residential streets and a collector street within the City of Pasadena. The project comprised nine separate residential streets, including West Park Lane, Madison Avenue, Austin Avenue, Easthaven Drive, Magnolia Street, Tilden Drive, Polk Avenue, Kansas Street, and Llano Street, a major collector.  The project scope included the complete reconstruction of existing neighborhood concrete roads, including storm sewer, sanitary sewer, and water line replacements and upgrades. The project also included Americans with Disabilities Act (ADA)-compliant sidewalks/shared-use paths and ramps, signing and pavement markings, traffic control, a stormwater pollution prevention plan (SWPPP), a complete drainage study, and a geotechnical report. This reconstruction project was bid on a unit-price basis before design began and executed on a fast-track schedule. This included close coordination between DCCM and the contractor during the design and continuous coordination with the City of Pasadena and the contractor. This close coordination allowed changes to be quickly made in the field during construction as required. Portions of the project required innovative engineering to provide the necessary detention within the street’s limits. This fast-track process will set the path for future projects designed and constructed within the City of Pasadena. The design and reconstruction of all streets were completed within an accelerated 12-month schedule. At a Glance 12,220 Linear Feet $11.4 million Construction Cost Markets Municipal Surveying Transportation Services Surveying Transportation Utilities Water & Wastewater

Avenue S Rehabilitation

Avenue S Rehabilitation Galveston County DCCM provided the design of 8,600 linear feet of roadway reconstruction along Avenue S from 53rd Street to Seawall Boulevard. The paving cross-section comprised two travel lanes with two outside parking areas. The project design included replacing 8,900 linear feet of water line, including branches and intersections along the route, crossing intersections that were previously reconstructed for other concurrent projects. Additionally, a 15-inch sanitary sewer was replaced, stretching from 35th Street to 33rd Street, including branches and intersections. Our assessment of the drainage system along the corridor and side streets enabled us to determine the most effective methods for enhancing drainage efficiency while removing bridge blocks. The flat terrain of Galveston provided grading challenges, and with our detailed 3D grading abilities, the shallow underground storm system had the proper cover under the road and for some instances where standard cover was not achievable, it was discovered and known during the design or it was identified during construction and the design remedies were ready before construction was delayed. Our subconsultants performed geotechnical, surveying, SUE, environmental, and inspection services for the project. DCCM provided construction phase services for the City of Galveston and collaborated with the contractor to ensure the design intent was effectively implemented. The final product of the road was excellent, and the contractor successfully constructed the road and storm sewer system with minimal RFIs and minor adjustments to the road, sidewalks, and storm sewer system grading. All meetings were accompanied by a well-organized agenda and meeting minutes, which included detailed action items to be completed by the next meeting. This attention to detail and accountability helped lead the project to a successful completion and limited citizen complaints. Surveying Services DCCM supported land surveying services for 2.5 miles of Avenue S from 53rd Street east to Seawall Boulevard Drive. Tasks included right-of-way (ROW) determinations, topographic surveying, and subsurface utility surveying to support engineering design. The project included a full-depth replacement of existing pavement and utilities, including water lines and subsurface sanitary and storm sewer systems. Approximately 275 parcels were abstracted to support ROW determinations and graphically depict property ownership. Survey control was established, including ground targets for aerial triangulation of UAS/drone imagery acquired by a subconsultant. Lidar data was also collected, post-processed, and delivered to us for analysis and integration into our survey. Supplemental ground surveying was performed to support the validation of the imagery and lidar data. Final deliverables included 3D mapping in Civil 3D format and rectified orthomosaic imagery of the project extents. SUE Services DCCM provided SUE services along 8,600 linear feet of water and sanitary sewer line from Avenue S from 53rd Street to Seawall Boulevard. The SUE QL-B designation revealed more than 56,000 feet of utilities in that area. As in all SUE projects, the utility mainlines were designated. This project was unusual because all utility services were also designated so that the designers would have substantial utility information and the best chance to protect the utilities in place—this required electronically traceable duct runners, fish tapes, and electromagnetic sweeping. At a Glance $9.25 million Construction Cost $146,000 Survey Cost 86,000 Linear Feet of Sanitary Sewer Line 56,000 Feet of Utilities Markets Transportation Surveying Services Transportation Program Management Surveying Utilities Water & Wastewater

Cedar Bayou Crossing Corridor Study

Cedar Bayou Crossing Corridor Study Harris County and Baytown, Texas DCCM was selected to provide professional services for the proposed Cedar Bayou crossing. The crossing will serve as a critical link for the City of Baytown to ensure the orderly development of the northern part of the city and provide necessary east-to-west mobility to supplement IH 10. The project area was from Hunt Road at Main Street to Kilgore Parkway at SH 146. DCCM provided project management, data collection, existing condition evaluation, alternative analysis, community outreach support, preliminary engineering, geotechnical investigation, subsurface utility engineering, survey, and an environmental analysis. DCCM conducted a corridor study to identify alignment alternatives and assess the project’s feasibility. The study included several aspects to consider and required sufficient information to measure and evaluate a range of viable improvement options. The traffic analysis reviewed traffic and crash data, existing roadways, traffic flow patterns, traffic counts, turning movement counts, and transit and traffic operations. The DCCM team conducted capacity analyses for designated locations and sections of roadways and made recommendations to improve traffic flow. DCCM provided hydrology and hydraulics (H&H) to support the corridor layout of the proposed roadway. This task used the latest Mapping, Assessment, and Awareness project (MAAPNEXT) models for Cedar Bayou as developed by the Harris County Flood Control District. DCCM also provided community outreach, public meetings, and City Council meetings. The project concluded with identifying recommended improvements, preliminary plans with several alternatives and their estimated costs, and a preferred alignment. Surveying Services DCCM performed professional surveying services to obtain and review existing lidar data and the limited preliminary ground survey data for the Cedar Bayou Corridor Study. The project spanned 3.7 miles from North Main Street, 3,300 feet south of IH 10 (west tie-in point), to the intersection of SH 146 and Kilgore Parkway (east tie-in point). The latest available lidar data published from USACE and Texas Natural Resources Information System covering the project area to evaluate and perform the following tasks: Data sets were extracted/downloaded into Esri ArcGIS (Pro+3D Analyst tool) and Context Capture/OpenRoads Cross-data checks were performed against public datasets from TxDOT, the City of Baytown, Harris County, and other available online resources. The MicroStation DGN deliverable included: DEM 2D building/structure footprints Roads, highways, and railroads Overhead transmission lines Other visible features within the lidar data Limited field surveying was performed. Field surveying tasks included setting four project control points, performing limited topographic surveying along North Main Street (1,000 feet north and south of the west tie-in point) and SH 146 (500 feet north and south of the west tie-in), and obtaining cross sections along the existing railroad running through the project. Field surveying also included determining the elevations of the existing railroad running at the railroad bridge over SH 146 and confirming (spot-checking) the lidar data in several accessible areas. The survey data was based on the NAD 83, Texas Coordinate System, South Central Zone (4204) CORS adjustment. Elevations were based on the NAVD 88 2001 adjustment relative to the lidar data. The survey information was provided in MicroStation Select Series 10. At a Glance 3.7 Miles $140 million Construction Cost Markets Transportation Surveying Services Transportation Surveying Utilities Water & Wastewater

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 is a story of innovation, collaboration, and technical excellence. DCCM led the team that worked closely with the City of College Station, TxDOT, Texas A&M University, and Easterwood Airport to address the region’s rapid growth and evolving transportation needs. Our journey began with a comprehensive corridor study and traffic analysis, which revealed that traditional intersection designs would not provide the necessary capacity or operational improvements. In response, we expanded our analysis to include six additional alternatives and ultimately selected an innovative “superstreet” (Restricted Crossing U-turn) design. This approach reduced signal phases at intersections, improved traffic flow, and provided flexibility for future upgrades to a controlled access facility. Our scope included data collection, accident and traffic analysis, environmental documentation, public involvement, identification of right-of-way (ROW) and easements, utility coordination, and topographic surveying. We also managed a team of eight subconsultants for specialized analyses and design tasks. We completed both the schematic and PS&E phases for FM 2818, developing a geometric design schematic from Wellborn Road to F&B Road, and seamlessly transitioning into detailed construction documents. The final schematic design was coordinated with the parallel PS&E design team, enabling construction documents to reach 60% design before schematic finalization. This efficient transition was made possible by keeping most of the same key staff and maintaining a strong project management plan throughout both phases. One of the most significant challenges was the presence of a major underground electric duct bank that conflicted with the proposed curb line and storm sewers. By conducting precise SUE QL-A potholing and collaborating with the city and TxDOT, we developed a solution that allowed the duct bank to remain in place while relocating the storm sewer, avoiding major disruptions and keeping the project on schedule. Another challenge arose when a new overpass at Jones-Butler Road was added late in the design process. Our team quickly adapted, revising schedules and resources to incorporate the new structure without impacting the letting date. Environmental considerations were also paramount. White Creek, which runs parallel to the corridor, required careful coordination to minimize impacts to the floodplain and wetlands. Through detailed grading, innovative barrier design, and close collaboration with regulatory agencies, we kept wetland impacts below permitting thresholds and avoided additional ROW acquisition. The FM 2818 project is now under construction. The result is a safer, more efficient, and future-ready corridor that supports the continued growth of College Station and the surrounding community. Traffic Analysis/Corridor Study Services DCCM performed a corridor study for FM 2818 from George Bush Drive to Wellborn Road. The study examined various alternatives, including many different intersection configurations. Ultimately, the conventional intersection designs failed to provide adequate operations. As a result, the superstreet concept was proposed and evaluated as a potential solution for the corridor. This provided the opportunity to reduce signal phases at intersections while maintaining the flexibility to upgrade the corridor to a controlled-access facility in the future should the need arise. Responsiveness: The original scope included an analysis of three options for access management along the corridor, none of which provided adequate capacity. To keep the project on schedule, the DCCM team worked with the City of College Station and TxDOT to identify and analyze six more options before the change order was processed. The innovative intersection used in the final design was one of these six additional options. Surveying Services During the S&E phase, DCCM provided a comprehensive topographic survey on this City of College Station/TxDOT street design project. The route was a 1.8-mile section of the existing state highway roadway. The extra width of the ROW created an unusually large, 80-acre project area, with several acres of native trees and brush. Using baseline survey points and information from the early 1970s, the ROW lines were accurately fitted to the topographic survey. Additionally, Baseline | DCCM had surveyed utility easements along the highway over 15 years prior, before any of the adjoining apartment complexes were developed. Schematic Design Services DCCM developed a geometric design schematic for FM 2818 from Wellborn Road to George Bush Drive. The project scope included conceptual and schematic design, data collection, accident and traffic analysis, conceptual design, schematic design, environmental documentation, public involvement, ROW/easement identification, utility coordination, project management, and topographic surveying. The initial scope included analyzing three design-year alternatives, developing a conceptual schematic for each, and developing the selected alternative through schematic design. Based on the results of the traffic analysis/conceptual design and meetings with City of College Station and TxDOT staff, it was determined that the three design-year alternatives would not adequately address growth issues along the project corridor; therefore, six additional alternatives were analyzed. Based on the traffic analysis and input from the City and TxDOT, a “super street” option was selected and developed through schematic design. SUE Services Under the SUE department’s TxDOT contract, the Bryan District requested that SUE QL-B designation be performed for their 3.2-mile FM 2818 Improvement project. More than 265,000 linear feet of utilities were identified on the project, resulting in a utility map that revealed numerous critical conflicts with the proposed roadway improvements. The designers and utility coordinators asked for 24 SUE QL-A test holes. All test holes were completed, the SUE QL-B designation and the conflicts it revealed were validated, and the designation was assigned. An additional SUE QL-B was requested for the downside streets to fully understand the utility impact. This project faced challenges, including complex traffic control and Texas A&M mowing the TxDOT ROW before each home football game. It was critical to complete the survey work each week before the Friday afternoon mowers arrived. At a Glance 40% Reduction in Corridor Travel Times $57.6 million Construction Cost Markets Transportation Environmental Services Transportation Surveying Utilities

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