a single groyne cost about £5,000 per metre http://www.mjanderson.chislehurst.btinternet.co.uk/coastseadefence.htm this is where find more of the cost of sea defences :D
A groynes is a hydraulic structure. It is build very sturdy so that it interrupts water flow on the ocean shore.
A groyne is a hydraulic structure that is used to interrupt water flow and to keep sediment from moving. Groynes can cost up to $770,000.
It cost about $550 million to build.
it cost 1p to build this building
It cost about 9,000 pounds to build a Spitfire.
It cost about 300 million dollars to build your welcome
About 10.5 is the cost to build
It cost 1,000,000 dollars to build the Rosenberg Castle.
What does i:-) t cost to build Costco
Groynes are used for blowing bubbles .
It cost more than £15600 to build the titanic