John le CarrÃ©âs most famous Cold War spy, George Smiley, said goodbye in 1990. But past and present intersect as his and his colleagues' actions are examined in contemporary London.
Ditch Witch is an American brand of underground construction equipment built by The Charles Machine Works, Inc., which has been in operation under the current name since 1949. The company is based in Perry, Oklahoma.
Ditches are designed to convey water. In the stormwater world they are designed to carry a lot of water and we call them vegetated swales. A properly designed swale will have a wide, relatively flat bottom that allows water to spread out, slow down, and infiltrate.