"in which" grammar Hello everyone. I'm having a hard time using "in which" after a complete sentence. I'm wondering whether or not I've used it correctly in my sentence: "Hydraulic fill is one of the most cost effective methods of constructing earth fill dams in which the materials are conveyed into their final position in the dam by suspension in flowing water" the sentence seems kind of queer to myself!, nevertheless I'm not able to think of any other way to write it. my mind seems to have been locked on this sentence!!