T: 01768 800 878 | Email: info@grantltd.co.uk
Civil Engineers specialising in
deep excavation, ground support & renewable energy schemes
River Eden Cumbria

Tidal and In-River Works

Grant Ltd have completed a series of in-river works for United Utilities throughout Cumbria to construct both water intake systems and combined storm water overflow outlets. These include a new water intake in the river Eden near Carlisle, sewer pipe crossing of the river Ehen in Egremont, and sewer pipe crossing in the river Derwent downstream of Cockermouth.

We have also successfully completed a number of sea outfall pipes, working below high water mark, from the Ribble Estuary near Preston, Tay Estuary at Dundee, Clyde Estuary at Largs, and at Dunbeg by Oban.

Our Services


Sea Outfall Pipes

Tidal Working

River Crossings with Coffer Dams

Temporary River Diversions

Completed Tidal & In-River Works Projects


Elterwater Remediation Scheme, Cumbria

Working for the South Cumbria Rivers Trust, Grant Ltd took 3 months to complete this river water diversion scheme. A blister coffer dam was needed to dry out a bankside working area to construct a screened intake, and then 350m of gradient fall pipe to an outfall into Elterwater. Encountering hard rock, swampy peat, and the wettest weather conditions in living memory, Grant Ltd workforce braved floods and major road diversions to get to work and were still able to complete on time.

Blister Dam in Langdale Beck
Outfall
Intake Downstream
Intake Structure

Palnackie WwTW, By Dalbeattie, Dumfries and Galloway

Client Scottish Water wished to install two new Condor sewerage treatment tanks to serve the small coastal port of Palnackie, near Kippford. The installation next to the tidal reaches of the Urr Water, required a supported coffer dam and excavations to below low water mark. Once the excavation was prepared, dried out and blinded, the two tanks were lifted in with a 30 tonne excavator under a load specific lift plan. Grant Ltd completed the works and handed back to the main contractor for the remaining site works.

Palnackie WwtW - Dumfries & Galloway
Palnackie WwtW - Dumfries & Galloway
Palnackie WwtW - Dumfries & Galloway
Palnackie WwtW - Dumfries & Galloway

Kishorn, Ross-shire

Overlooking the Isle of Skye, Kishorn is a small coastal village fronting a sea loch, where Grant Ltd were engaged to install a marker pole at the sea outfall pipe. Working in tidal waters, the challenge was to excavate a dry hole in which to build a foundation strong enough to withstand the wind and tides. A shored coffer dam was used which was dried out following each tidal inundation and allowed the concrete footing to be cast in standard manhole rings.

Kishorn Ross-shire
Kishorn Ross-shire
Kishorn Ross-shire
Kishorn Ross-shire

Dunbeg, By Oban, Argyll and Bute

Dunbeg is a small village to the north of Oban where Scottish Water required a new sea outfall pipe for the upgraded waste water treatment works serving the village.
A temporary access track was laid alongside the old pipe to enable access over the mud flats. The new ductile iron pipe was laid on prefabricated concrete stools and finished with a headwall and storm flap. The old infrastructure was removed.

Dunbeg nr Oban
Dunbeg nr Oban
Dunbeg nr Oban
Dunbeg nr Oban