JOH and Sons has extensive experience in marine and waterway construction, delivering projects along Ireland's coastline and inland waterways. Our marine works include pier construction, jetty repair, riverbank stabilisation and coastal protection schemes.
Our Capabilities
Coastal Protection
Sea defence and coastal protection works including revetments, rock armour and wave dissipation structures.
Riverbank Stabilisation
Erosion protection and bank stabilisation using rock armour, gabions, sheet piling and bioengineering techniques.
Pier & Jetty Construction
New pier and jetty construction using concrete, steel and timber, designed for durability in marine environments.
Quay Wall Repair
Structural repair and refurbishment of existing quay walls, including repointing, underpinning and capping.
Waterway Infrastructure
Locks, weirs, sluices and associated waterway infrastructure for navigation and flood management.
Dredging & Clearance
Channel dredging, debris clearance and maintenance works to maintain navigable waterways.
Representative Projects
Grand Canal Lock C4, Dublin
Waterways Ireland
Repair and stabilisation works to Lock C4 on the Grand Canal, including structural repair to lock chamber walls, installation of stop logs, lowering of lock chamber water level, and surrounding hard and soft landscaping.
Narrow Water Bridge Roost Site
LCC
Construction of a roost site and enabling works for the Narrow Water Bridge project. Works were carried out within Carlingford Lough, a tidal area designated as an Area of Special Scientific Interest (ASSI), requiring careful environmental management throughout.
Ulster Canal Dredging
Waterways Ireland
Dredging of the historic Ulster Canal to open up the navigation channel for boats, restoring this important inland waterway to navigable condition and supporting the long-term restoration of the Ulster Canal corridor.
Victoria Lock Refurbishment, Newry
NMDDC
Refurbishment of Sea Lock Gates and dredging of the Lock Chamber at Victoria Lock, Newry, restoring the lock to full operational condition.
Lucan Canoe Slalom, River Liffey
Canoeing Ireland
Construction of a canoe slalom course on the River Liffey at Lucan, including rock placement and river channel works to create a challenging and safe slalom course for competitive and recreational use.
Louth Coastal Protection Works
LCC
Installation of rock armour protection to areas of coastal erosion caused by storm damage along the Louth coastline, protecting residential properties and coastal roads from further wave action and erosion.
Gilford Canoe Slalom, Armagh
ABC Council
Creation of a canoe slalom course including jetty construction and riverbank stabilisation works.