sand backfilling
1coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… …
2river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …
3Jack Lynch Tunnel — The Jack Lynch Tunnel (named after the former Taoiseach Jack Lynch), or Tollán Seán Ó Loinsigh in Irish, is an immersed tube tunnel and an integral part of the N25 southern ring road of Cork in Ireland. It takes the road under the River Lee.… …
4DEME — Dredging, Environmental and Marine Engineering NV Type Limited company Founded 1991 Headquarters Zwijndrecht, Belgium Area served Worldwide Key people Luc Bertrand ( …
5Chaco Culture National Historical Park — Chaco Culture National Historical Park …
6irrigation and drainage — ▪ agriculture Introduction artificial application of water to land and artificial removal of excess water from land, respectively. Some land requires irrigation or drainage before it is possible to use it for any agricultural production; other… …
