City of Bellingham Crushed toilets are added to concrete mix in Bellingham, Wash. Contractors bidding on projects for the City of Bellingham, Wash., have the option of adding a new element to concrete mixes—toilets.The city wants recycled aggregate in concrete flatwork projects to catch on, so much so that engineers have experimented with using crushed toilets in a new “poticrete” mix. They unveiled the first stretch of sidewalk sporting poticrete in late September.Freeman Anthony, Bellingham city engineer, says he was working on upping recycled products in city concrete specs when a local nonprofit that does green building called and asked
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.