Water & Wastewater Archives

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

Bridgewater Villages 12, 13, and 14

Bridgewater Villages 12, 13, and 14 Lakeland, Florida DCCM provided boundary and topographic surveys, civil site design, permitting and construction services for the Villages at BridgeWater; a 620-acre residential development in Lakeland, FL. Civil site design included existing conditions/demolition plan, site grading & drainage, stormwater management, water service connections, sanitary sewer connections, erosion control plan and a Stormwater Pollution Prevention Plan. Survey tasks included retracement of Interstate Right-of-Way, platting phase services, research of survey, and Public Land System records as well as deeds and easements of record. Additional tasks included establishing horizontal and vertical control untilizing both GPS and leveling from established NGS control and researching and depicting the FEMA flood zone. DCCM also performed topographic and boundary survey of the golf course property. DCCM also provided zoning support as well as permitting coordination with the City of Lakeland, the Florida Department of Environmental Protection (FDEP), and Southwest Florida Water Management District (SWFWMD), and the Federal Emergency Management Agency (FEMA) for a Letter of Map Revision based on Fill (LOMR-F). At a Glance 620 Acres $153,910 Project Cost Markets Land Development Surveying Services Land & Site Development Surveying

Vilano Pier Floating Dock

Vilano Beach Floating Pier Vilano Beach, Florida DCCM provided engineering design services for a 100-foot floating dock installed perpendicular to the Vilano Pier in St. Johns County, Florida, enhancing boater access to the Vilano Town Center. The project required careful evaluation of challenging site conditions, including heavy boat traffic, wind-driven wave action, and strong tidal currents. Our team conducted a comprehensive review of existing conditions and anticipated loading requirements to inform the development of performance-based design specifications for the floating dock system and associated gangways, ensuring long-term functionality and durability. In collaboration with subconsultants, DCCM supported the project through bathymetric surveying and water quality analysis to assess water circulation and flushing characteristics critical to the dock’s performance and environmental compliance. The team also coordinated permitting efforts with regulatory agencies, including the Florida Department of Environmental Protection (FDEP) and the U.S. Army Corps of Engineers (USACE). During construction, DCCM provided ongoing support through contractor submittal reviews and coordination, helping to ensure the project was delivered in accordance with design intent and regulatory requirements. At a Glance 100 Foot Floating Dock Markets Water Municipal Services Service

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, FL 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 from the Florida Planning and Zoning Association Project Award Markets Land Development Buildings Water Services Land & Site Development Buildings & Places Program Management Water & Wastewater

Stillwater Residential Development

Stillwater Residential Development St. Johns, FL DCCM provided professional engineering services for the Stillwater development, an age-restricted community featuring 550 single-family and multifamily duplex units, along with an 18-hole golf course and associated amenities, infrastructure, and roadway design. The development included an 18,828 SF clubhouse building, 2,109 SF aquatics building with a pool, a 600 SF driving range concession and restroom building with associated driving range bays, and a 9,098 SF maintenance facility. Additional recreational features encompassed a 2.5-acre driving range, two full-size tennis courts, two full-size pickleball courts, a bocce ball court, and special event lawn space. Our team coordinated the design and permitting with St. Johns County, the Water Management Distrcit, JEA, Florida Department of Environmental Protection, and Army Corps of Engineers. DCCM was also responsible for certifications of the completed construction, which required routine site visits throughout construction, an as-built review, and a thorough assessment of all testing documents. The project included over 10,000 feet of 24-inch reclaimed water main, along with more than 10,000 feet of both water main and sanitary force main of various sizes less than 24″ in diameter to support the community’s infrastructure needs. The onsite utilities were also designed through detailed coordination with JEA staff to ultimately provide a looped connection between existing infrastructure within Veterans Parkway and CR 210.  At a Glance 784 Acres $932,000 Project Cost 2023 Development of the Year Honorable Mention by Golf Inc. Magazine Project Award Sports Illustrated Most Innovative Course Design for 2022 Project Award Markets Land Development Water Services Land & Site Development Water & Wastewater Utilities

St. Johns County Health & Human Services Center

St. Johns County Health & Human Services Center St. Augustine, FL DCCM provided engineering services for the Health & Human Services facility located near the St. Johns County office complex. Completed in three phases, the project encompasses over 40,000 SF of building footprint on a 16-acre site. Notably, the Center’s stormwater facility includes a wet detention pond paired with two bio-retention ponds, providing diversity of landscaping to the site. Project scope included complete civil site design, stormwater and utilities infrastructure design, and permitting with St. Johns County, City of St. Augustine, FDEP and SJRWMD. Our team coordinated and managed all aspects of this project and worked closely with the building architect, St. Johns County Construction Services, and St. Johns County Survey Department. We coordinated with subconsultants to determine the wetland line and flood plain impact, and conduct geotechnical investigations. We also worked with the City of St. Augustine Public Works Department, as the City provided utility service to this site, and USACE to obtain permitting for this project. Our team helped the county prepare bid specifications, assisted with bid evaluation, subsequent contract administration and engineering construction inspection of the contractor. This project serves as an example of DCCM’s experience in working with several entities to complete a large project on an accelerated schedule. At a Glance 40,000 Square Feet $63,000 Project Cost Markets Water Land Development Services Water & Wastewater Land & Site Development Program Management Utilities

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