PROJECT: Deneholm Outfall
LOCATION: Blackhall, North Sea
CLIENT: Alfred McAlpine
VALUE: £320,000
PROJECT OVERVIEW: CMP were contracted to install a 170m long 1200mm diameter outfall pipeleine including riser and diffuser.

WORKS DESCRIPTION:

• Construct 1200 ton rock causeway approx 150 metres long
• Drive sheet piled cofferdam approx 80m long and install bracing etc.
• Excavate trench to a maximum depth 4.5 m within cofferdam and shoreside
• Prepare engineered bed
• Install 170 metre long by 1200 diameter MDPE pipeline including riser & diffuser, shutters and concrete 30 m3 diffuser anchor block
• Break existing outfall pipe and reconnect the new.
• Place pipe surround and backfill
• Place 1000 ton of amour stone around the diffuser area
• Extract sheet piled cofferdam
• Remove existing CI outfall including all the support trestles
• Remove rock causeway and reinstate the beach