Portfolio Category: Water & Wastewater

Countryside Wastewater Treatment Plant Decommission, Lift Station and Force Main Upgrade

Countryside Wastewater Treatment Plant Decommission, Lift Station and Force Main Upgrade League City, Texas DCCM was selected to provide preliminary engineering, final design, and construction services to decommission the existing Countryside Wastewater Treatment Plant (WWTP) and install a new lift station and new force main to divert wastewater to the existing Southwest Water Reclamation Facility. The existing lift station was decommissioned and replaced with a new 10-foot lift station featuring three 20-horsepower submersible pumps, providing a firm capacity of 850 gallons per minute for diversion service. The design included modifications to the existing sewer collection system, including the addition of new manholes and gravity lines to intercept and divert sewer flow to the new lift station. Construction sequencing, bypass pumping, and coordination were carefully planned to allow the construction of the new lift station, sewer diversion, and demolition of the existing lift station and wastewater treatment facilities. The new lift station featured a programmable logic controller (PLC)-based pump control panel, supervisory control and data acquisition (SCADA) access via a wireless antenna for remote monitoring, and a manual transfer switch to facilitate emergency generator connection in accordance with TCEQ requirements. At a Glance 850 Gallons per Minute $1.6 million Construction Cost Markets Municipal Services Water & Wastewater

108-Inch Northeast Transmission Line, Contract 99D-2

108-Inch Northeast Transmission Line, Contract 99D-2 Houston, Texas DCCM provided final engineering design and construction-phase services for 1.4 miles of 108-inch water main from Aldine Westfield Road to Willis Street in north Houston. This project was extremely complex due to the size of the water main and the congested area where the alignment was located. DCCM worked with the City of Houston and its Program Manager to develop a 50-foot water line easement through an existing urban region. To develop the preferred alignment, DCCM considered construction issues, including laydown areas, environmental constraints, traffic impacts, and existing utilities. DCCM developed alignment alternatives, such as tunnels instead of open-cut construction, in multiple areas to minimize or eliminate significant impacts on existing businesses, as numerous commercial buildings are close to the route. Tunnels were designed to mitigate the impact on the buildings and their operations in these areas. Since the project was in an urban region, DCCM worked closely with the existing utilities to develop utility conflict documents and support their relocation. The design also included construction phasing and traffic control to maintain access to residences, facilities, and emergency services. The water line was a significant transmission main constructed via open-cut and tunneling methods. Each method was optimized for the project. At a Glance 108-inch Water Main 7,400 Linear Feet $31 million Construction Cost Markets Municipal Surveying Services Water & Wastewater Surveying Utilities

69th Street Wastewater Treatment Plant, Packages 5 and 6

69th Street Wastewater Treatment Plant, Packages 5 and 6 Houston, Texas Package 5: DCCM completed field investigation and final design services to replace the existing 69th Street wastewater treatment process instrumentation and controls for the entire wastewater facility. Work included the replacement of flow meters, analyzers, pressure and level instruments, pneumatic and electrical control valves, electrical conduits, and control panels for the lift station, headworks, flow distribution controls, oxygen reactors, clarifiers, return activated sludge and waste activated sludge pump stations, sludge thickeners, and an odor control system. Package 6: DCCM provided a preliminary engineering study, including filter pilot testing and evaluation of new tertiary filter technology to replace the existing sand filters at the 69th Street WWTP. DCCM worked with the City of Houston to procure a new filter system. The final design included modifying the existing treatment facility infrastructure and adjusting the hydraulic profile to fit the new filter system, a new electrical system with instrumentation, and control systems. The existing sand filter system was demolished and replaced with a Kruger disc filter system. The new disc filter system is rated for an average of 220 million gallons per day and a peak flow of 440 million gallons per day, making it Texas’s largest tertiary filter system installation. At a Glance 440 million Gallons Per Day $25.4 million Construction Cost Markets Municipal Services 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

Piper Road Drainage Improvements

Piper Road Drainage Improvements Brazoria County and Pearland, Texas DCCM provided design plans and specifications for a bid-ready submittal package that included comprehensive drainage and minor roadway improvements for Piper Road. The 2,900-foot project extended from FM 518 (Broadway Street) on the north to Fite Road on the south. The project included an asphalt overlay, along with subgrade repairs where necessary, based on visual cracking and pavement failure. The design reduced the watershed area for the portion of Piper Road draining to the north, which diminished a recurring ponding problem at FM 518. The majority of the roadway now drains to Fite Road on the south using storm sewers underneath the former ditches. Driveway culverts were eliminated for the storm sewers draining to the south and were replaced with area drains between the driveways for direct drainage into the new storm sewer system. Using storm sewers in this manner eliminated the need to do costly utility relocations or ROW acquisition. At about the same cost as acquiring ROW and moving utilities, this concept greatly reduced the time required for project completion and the need to disrupt the front yards of homes along Piper Road. Existing, significant trees also did not need to be removed. Existing water and sanitary sewer main lines and services were either protected or replaced to accommodate the new storm sewers. We leveraged our relationship with CenterPoint Energy to expedite relocations with the proposed storm sewer before construction began, keeping the project on schedule. The project significantly improved drainage compared to the existing roadway ditches. At a Glance 2,900 Feet $1.2 million Construction Cost Markets Municipal Services 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 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

The Hall at Bourbon Brothers Event Venue

The Hall at Bourbon Brothers Event Venue Gainesville, Georgia DCCM was proud to support the development of Bourbon Brothers Smokehouse & Tavern and Boot Barn Hall live music venue in Gainesville, Georgia. Situated at the northeast corner of Jesse Jewell Parkway and West Academy Street, this high-profile project brings a new dining and entertainment experience to the heart of downtown. The development includes a ~9,000-square foot restaurant and a ~16,000-square foot concert and event venue, along with supporting infrastructure including access drives, parking, drainage improvements, underground storm water retention and site utilities. The site, located within an existing paved lot, required creative design solutions to blend into the growing urban fabric of Gainesville. With the Bourbon Brothers project, DCCM continues its commitment to shaping quality spaces across North Georgia that enhance community, drive economic growth, and support long-term success for our partners. At a Glance 25,000 Square Feet $61,500 Project Cost Markets Land Development Buildings Water Services Land & Site Development Utilities Water

Wheatland Wastewater Improvements

Wheatland Wastewater Improvements Wheatland, Indiana DCCM led an internal and external team of engineers to design and develop a new sanitary sewer system for the Town of Wheatland. This system included designing three positive displacement blowers for a new extended aeration plant along with several miles of new low pressure force main, one lift station, and a package wastewater treatment plant for the town of 500 people. The team evaluated wastewater lagoons for Wheatland being crucial for maintaining compliance with regulations and ensuring effective treatment. One of the key challenges in the design of project was ensuring the project met the Town’s limited budget, supported by a $14 million SRF grant award for water/wastewater. Through a combination of creative design and funding solutions and selection of a minimally invasive technology such as low pressure sewer, DCCM was able to secure reasonable bids that allowed the project to proceed. At a Glance 10 Miles $10.2 million Project Cost “The team (DCCM) is nothing short of amazing on the projects we have worked on with them. They are always organized and available if there are questions. I have seen Aaron Crow, Poject Manager, work along with his team members as he is always clear and concise on what he is asking for. I believe the team excels under his leadership and never feel overwhelmed or worried about the projects because they communicate with us to keep everyone organized and on task. They have definitely been an asset to our Town and Utility!” Erika Goble Wheatland Deputy Clerk Markets Municipal Water Services water Conveyance Treatment Water Resources

Panther Parkway

Panther Parkway Sebring, Florida PHASE I – In fall 2001, DCCM completed the design for widening approximately one mile of Fairmount Drive from a two-lane local road to a five-lane major collector with sidewalks. Construction was completed by the end of 2002 at a cost of $500,000. PHASE II – DCCM supported the County by designing highway lighting and signalization for six intersections and preparing the design and permitting for six stormwater retention ponds along the two-mile route. PHASE III – In January 2017, DCCM contracted with the Highlands County Board of County Commissioners to modify the design of a 4.3-mile segment of Sebring Parkway Phase III between Sebring and Avon Park. The original design and permit, completed by others, proved cost-prohibitive and jeopardized an FDOT CIGP Grant. Leveraging our expertise in stormwater permitting, DCCM redesigned the entire roadway and modified the Environmental Resource Permit, managing $3.2M in FDOT funding. Construction, estimated at $8M, began in March 2018. By August 2019, the north-end connection to the Memorial Drive Roundabout was completed, and the Sebring Roundabout (formerly Panther Parkway) on the south end was finished by year-end 2019. At a Glance 4.3 miles Project Size $10 million Project Cost Markets Transportation Services Transportation

PK Avenue Stormwater & Roadway Improvements

PK Avenue Stormwater & Roadway Improvements Auburndale, Florida DCCM provided watershed planning, conceptual design, feasibility analysis, surveying, and cooperative funding support to develop a concept improvement plan for 3,500 linear feet of PK Avenue. As the gateway to downtown Auburndale, the City sought improvements that would not only resolve chronic roadway flooding and enhance stormwater quality for the 261-acre urban drainage basin but also improve neighborhood aesthetics and add a pedestrian trail for recreation. The recommended concept redeveloped PK Avenue from four lanes to two and incorporated low-impact development techniques, including bio-retention swales, on-street pervious parking with subsurface storage, and a one-acre retention pond. Our team also assisted the City in securing $1.3M in cooperative funding from the Southwest Florida Water Management District (SWFWMD). At a Glance 2019 Grand Award for Engineering Excellence in Water and Stormwater from ACEC-FL Award 2019 Award of Merit from ASLA-FL Award Markets Water Surveying Services Water Surveying