NR NR/L3/CIV/006/6 ISSUE 1 PDF

This part of the handbook applies to all Network Rail owned or managed, Shared or Outside Party Coastal, Estuarine and River Defences and other Structures that have been assigned to Structure Category F in accordance with NR/L1/CIV/032: Managing existing Structures¹.

Coastal, Estuarine and River Defences assigned Structure Category F include:

Linear Coastal and Estuarine Defences:

• sea walls;

• embankments (dykes or bunds);

• revetments (rock armour, concrete blocks, gabions, asphaltic blankets);

• apron;

• beach ridge;

• piling;

• pitching;

• toe piling.

Beach control Structures:

• groynes;

• breakwaters (shore connected, detached);

• sills.

• Estuarine defences:

• surge or tidal barrier;

• salt marshes.

Further details are given in Network Rail's document Coastal and Estuarine Defence Management Strategies:

Good Practice Guidance.

River defences:

• embankments (dykes or bunds);

• revetments (concrete blocks, gabions);

• sheet pile walls.

This standard does not apply to Coastal, Estuarine and River Defences which do not protect or support Network Rail infrastructure.

Purpose

The purpose of this part of the handbook is to define the particular requirements and recommendations for examination of Coastal, Estuarine and River Defences.

¹ This provides information on managing Structures for all Structure Categories.