▁in ▁a ▁slightly ▁elev ated ▁position ▁approximately ▁ 2 0 ▁metres ▁higher ▁than ▁the ▁D ale ▁Di ke . ▁Near by ▁stone ▁built ▁structures ▁such ▁as ▁An net ▁House ▁and ▁An net ▁Bridge ▁which ▁stood ▁by ▁the ▁Di ke ▁were ▁completely ▁swe pt ▁away . ▁ ▁References ▁ ▁Category : H ouses ▁completed ▁in ▁the ▁ 1 7 th ▁century ▁Category : H ouses ▁in ▁She ff ield ▁Category : History ▁of ▁She ff ield ▁Category : G rade ▁II * ▁listed ▁buildings ▁in ▁She ff ield ▁Category : F arm h ouses ▁in ▁England ▁Category : G rade ▁II * ▁listed ▁houses <0x0A> </s> ▁In ▁organiz ational ▁management , ▁mean ▁down ▁time ▁( MD T ) ▁is ▁the ▁average ▁time ▁that ▁a ▁system ▁is ▁non - oper ational . ▁This ▁includes ▁all ▁dow nt ime ▁associated ▁with ▁repair , ▁correct ive ▁and ▁prevent ive ▁maintenance , ▁self - im posed ▁dow nt ime , ▁and ▁any ▁log istics ▁or ▁administrative ▁del ays . ▁ ▁Description ▁The ▁inclusion ▁of ▁delay ▁times ▁distingu ishes ▁mean ▁down ▁time ▁from ▁mean ▁time ▁to ▁repair ▁( MT TR ), ▁which ▁includes ▁only ▁dow nt ime ▁specifically ▁att rib utable ▁to ▁rep airs . ▁ ▁Mean ▁Down ▁Time ▁key ▁factors : ▁ ▁SY ST EM ▁FA IL URE ▁ ▁Ident ification ▁& ▁Rec overy ▁Time . ▁ ▁First , ▁the ▁fact ▁that ▁the ▁system ▁is ▁down ▁must ▁be ▁identified , ▁and ▁maintain ers ▁not ified ▁& ▁brought ▁to ▁action ▁ ▁F ault ▁detection ▁and ▁isol ation . ▁