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Drainage systems are crucial components of water management strategies, serving to regulate the flow of water within natural and built environments. Consisting of surface drainage, subsurface drainage, and erosion control measures, these systems are designed to collect, convey, and control water runoff, thereby mitigating the risks of flooding, erosion, and waterlogging. By efficiently diverting excess water away from vulnerable areas, drainage systems play a vital role in safeguarding infrastructure, preserving soil health, and enhancing agricultural productivity. Furthermore, effective drainage contributes to environmental sustainability by maintaining natural habitats, ensuring water quality, and reducing the impacts of urbanization on ecosystems. Through careful planning and implementation, drainage systems help maintain equilibrium within ecosystems while providing essential protection against water-related hazards.


At Dahlen Structural, we provide comprehensive drainage services encompassing both subsurface and surface drainage solutions tailored to meet our clients’ needs. Our subsurface drainage services involve the installation of systems such as French drains and drain tiles, designed to effectively manage groundwater and alleviate potential waterlogging issues around properties. Additionally, our surface drainage solutions include the implementation of stormwater management systems, including catch basins, culverts, and swales, to efficiently divert surface water away from structures and vulnerable areas. Whether addressing excess groundwater or managing surface runoff, our team utilizes advanced techniques and quality materials to deliver effective and sustainable drainage solutions, ensuring the protection and integrity of our clients’ properties.

Types of Drainage


Surface drainage manages water runoff on the ground’s surface. Open ditches are shallow channels to channel water away. French drains use perforated pipes in gravel-filled trenches to divert water. Swales are vegetated channels that collect and filter stormwater runoff.


Subsurface drainage removes water from below the ground’s surface. Subsurface drains use buried pipes to carry away excess water, preventing waterlogging. Tile drains are porous pipes buried in trenches to drain saturated soils efficiently.