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Grade Control Structure - Rock Chute

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Description

Shallow layer of dense angular rock used to build a long sloping chute. Total fall usually limited to about 1m. The design incorporates an upstream notch, a chute section and an energy dissipating area. Cost $6,000 plus.

Application

Used to control active bed erosion in gullies, streams and rivers.

Limitations

Requires good supply of dense angular rock within reasonable cartage distance.

Comments

Filter cloth must be used in soils prone to slaking or dispersion. These structures are "flexible" easy to maintain and have an indefinite life.