Asphalt Specialists In Hydraulic Engineering


Coastal Protection
Dam Waterproofing
Dam Erosion Protection

Dam Spillway Protection

Fordingbridge Flood Alleviation Scheme
Bodmin Town Leat
Blackmoorfoot Reservoir
Loch Ericht Refurbishment Works
Ports & Harbours
Flood Alleviation
River Training
Scour Protection
Underwater Impact Protection
Strengthening Rock Structures
Landfill Linings
Offshore Services

Dam Spillway Protection

Existing Dams

When a reservoir's designed top water level is reached, any additional water entering the reservoir must be allowed to flow downstream. In the majority of cases the water flows down a spillway and enters a natural watercourse. With the apparent increase in extreme rainfall events and with greater downstream developments leading to re-classification of dams, spillways often need to be upgraded to withstand greater discharge volumes.

New Flood Storage Dams

Flood storage dams are built at the downstream end of proposed flood storage areas, upstream of the area to be protected. During a flood event the flow of water through a control structure within the dam is restricted, causing floodwater to build up on the land designated as the flood storage area. If the design flood event is exceeded the dam will overtop. To prevent damage to the dam a spillway is usually incorporated into the downstream slope of the embankment. This spillway channel requires erosion protection. Hesselberg Hydro has worked with consulting engineers and dam owners to create cost-effective and aesthetically acceptable solutions to provide erosion protection to spillways.

Please click on the links below to review recent projects: