Rubble Mound Survey — Assessing Armour Stone Stability

What is Rubble Mound & Armour Stone Survey?

KCC carries out diver surveys of rubble mound revetments and armour stone structures to assess stability, identify displaced stones, and detect void formation beneath the armour layer. Results are used to plan maintenance and identify areas requiring reinstatement.

What's Included

Systematic diver inspection of armour stone layer
Identification of displaced, overturned, or missing armour stones
Probing to detect voids beneath the armour layer
Measurement of armour layer profile and comparison against design
Formal report with condition assessment and reinstatement recommendations

Why This Matters

Displaced armour stones leave the underlying filter layer and core exposed to wave attack — leading to progressive erosion and eventual failure of the revetment. Regular surveys allow displacement to be identified and stones reinstated before the situation deteriorates.

Related Services in Seawall & Toe Condition Survey

Seawall Face Visual Inspection

Diver inspection of seawall face panels, joints, and coping for cracking, spalling, and displacement.

Seawall Toe Survey

Inspection and measurement of the seawall toe to identify scour, undermining, and cavity formation.

Bathymetric Survey Support

Diver-assisted bathymetric surveys to map scour development at seawall toes.

Part of

Subsea Inspection

KCC provides comprehensive subsea inspection services across marine infrastructure, port assets, and

View all Subsea Inspection services

IMCA ADCI HSE HKCP

IMCA · ADCI · HSE · HKCP Compliant

All diving operations conducted to IMCA, ADCI, HSE & HKCP standards

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