A sea wall about 100km long will take about 6 years to build.
it took 3 years to build the shard
15yrs
it took 27years to build interstate 75.
As long asthe builders needed!
It will take about 350 years.
build a seawall
how long does it take to build a asimo
How long did it take to build pyamids
The seawall is presently 10 miles long. It is approximately 17 feet high, and 16 feet thick at its base.
how long did it take to build the half moon
how long did it take to build the scottish parliment?
how long did it take to build cabot tower
how long did it take to build cabot tower
how long did it take to build the scottish parliment?
the advantages are that they help slow down erosion and thedisadvantages are they are so expensive to build
it was build 1284
hs2 will take 15 years to build