Channels and Spillways

Channels and Spillways

Diversion channels are made to direct or redirect flowing water. They can be constructed across a slope with a supporting ridge on the lower side. Land treatment practices or structural measures designed to prevent damaging accumulations of sediment in the channels should be installed with or before the diversions. During flooding, spillways release flows at a controlled rate from a dam or levee into a downstream area, so as not to overtop and damage the dam. A spillway can also refer to bypasses of dams or outlet of a channel used during high water. Flood waters can cause catastrophic damage through erosion, and in areas where flooding is expected, protection measures should be installed. Drop structures are low-elevation structures that span the entire width of the channel, creating an abrupt drop in channel bed and water surface elevation in a downstream direction. They can be used to stabilize channel grades, redistribute or dissipate energy, improve fish passage, and reduce erosion, and create structural and hydraulic diversity in uniform channels.

ArmorFlex for Channel, Spillway and Dam Overtopping Protection

Armorflex Tapered Block Series is capable of providing erosion protection in high velocity applications, such as spillways, overtopping and diversion channels. As a cost effective alternative to reinforced concrete lining or grouted rip rap, the Armorflex Tapered Series provides needed protection while fulfilling environmental quality requirements including vegetation promotion, habitat enhancement and associated water quality benefits.

A-Jacks and ArmorFlex for Channel Drop Structures

ArmorFlex articulating concrete block systems and A-Jacks armor units are used to construct highly stable channel drop structures in steep bed grade applications. An efficient and interlocking design, which uses less material compared to conventional techniques such as rip rap, provides maximum energy dissipation. Installation time is also dramatically reduced because of their unique cabled design.

A-Jacks and ArmorFlex for Channel Drop Structures

Our Erosion Control Blankets and Turf Reinforcement Mats offer cost-effective alternatives to dumped stone for feeder channels and diversion ditches. Installation is fast, easy and does not require any heavy equipment - resulting in a savings of both production time and project costs.

ArmorMax Reinforced Vegetation System for Channels and Spillways

The ArmorMax system can be used in non-structural applications where additional factors of safety are required, including protecting earthen levees from storm surge and wave overtopping and stream, river and canal banks from scour and erosion. In addition, this system is ideally suited to protect storm water channels in arid and semi-arid environments where vegetation densities of less than 30% coverage are anticipated. In these applications, the earth percussion anchors act as a tie-down mechanism securing the HPTRM firmly to the ground for additional factors of safety.

Modular Gabions for Drop Structures

Modular Gabions are welded wire mesh of varying sizes that can control erosion caused by drop structures.