Harnessing the power of water -- one of nature's most precious resources -- is the primary purpose of a dam. Crowder has held a key position in doing just that throughout the southeast region of the United States. From building new projects to reinforcing existing dam structures, we possess the extensive experience, skills, and knowledge necessary to ensure that the project meets its goals from start to finish.
Utilizing our Heavy Civil Division, Crowder works to devise the right combination of spillways, foundations, intake structures, penstocks, and outfall structures to meet the specific needs of each project. Each turbine, generator, and other machinery type requires a different approach, set of plans, and design method to ensure that it operates efficiently within the parameters -- both natural and manmade -- that are set for it.
Temporary structures are often utilized in order to address water control issues as well as to retain the integrity of the earth. Before devising a plan and design, our Heavy Civil Division looks at all the components involved. This is done to determine which structure(s) best meet the goals of the project as well as complement the natural elements involved. Examples of temporary structures that could be utilized include well point systems, gabion walls, cofferdams, vinyl sheet piles, soldier piles, grouted soil nailing, sheet piling, solider lagging, and driven soil nailing, etc.
Each dam presents its own unique challenges. While no two dam projects are identical, we use each experience to broaden our scope, reach, and diversity. This experience and willingness to always creatively learn with every project we undertake allows Crowder to effectively meet the challenges that each dam presents. As with all dam projects, a variety of regulatory agencies are involved from local, state, and federal levels. Each agency has its own particular set of goals and specifications that must be met in order for the dam to receive the green light.
While Crowder works closely with each agency involved to ensure that their stipulations are met while also staying within budget, there is another, equally complex issue at stake as well. The integrity of the water is always in the foreground of everything that we do. From the protective measures we utilize to our maintenance design element, water quality is always protected during Crowder's many varied projects.
Crowder Construction Company secured a part of history as the selected contractor for Phase I of the Battery Reconstruction and Repair project to repair significant deterioration to the portion of the Historic Battery Park Seawall in Charleston, SC known as "The Turn." The original palmetto log seawall was destroyed during an 1804 storm and rebuilt in stone in 1820. In 1893, a hurricane again brought about measures to strengthen the wall.
The current project consisted of removing 120 foot section of the high battery wall that was constructed during additional improvements in the early 1900’s. Crowder removed a hollow concrete earth-filled section founded on timber piles and timber decking. Once the old wall was removed, 74 composite piles were placed followed by placement of the new low coulomb concrete seawall in five lifts.
Finally, conversion of the walk-up leading to the turn’s platform from concrete steps to an inclined walkway was completed, making it more convenient for public use and accessible by all. The new concrete seawall, designed to last 100 years, was dedicated on June 20, 2014.
Crowder was responsible for repairs to the concrete face of the Lake Michie Dam, originally built in 1923. The repairs required the Crowder team to rappel over the deteriorating spillway. Despite this challenge, Crowder completed this project without safety issues. Crowder was responsible for repairing and strengthening the dam, including repairs to the earthen and concrete dams, including galley steps, doors and cosmetic repairs to the hydro-electrical building.
This project involved the construction of a new Labyrinth Spillway and partial demolition of the existing dam. Reedy Fork Creek had to be diverted away from the work area before construction of the new dam could begin. A diversion wall of steel plate and piles was constructed parallel to the creek and a cofferdam and access bridge was installed downstream of the site. In excess of 350,000 cubic yards of material was moved during the earthwork portion of the project and more than 10,000 cubic yards of concrete were placed, incorporating over 1.5 million pounds of reinforcing steel. This process required more than 100 concrete pours and was performed in six months.
This was a technically complex project involving the construction of a screen system and new water intake structure capable of supplying 35 MGD. Crowder worked closely with the engineer to determine the most economically and environmentally sensible way to accomplish this project. Crowder self-performed 75% of the construction on this project, which included the installation of two new screens with a backwash system. The project was completed with pinpoint accuracy, zero lost-time injuries and no impacts to the environment. This Crowder project was awarded the 2005 Carolinas AGC Pinnacle Award for “Best Utility Project,” and the National AGC Marvin M. Black Excellence in Partnering Award.