▁ 4 4 / P en nsylvan ia ▁Route ▁ 4 0 5 ▁before ▁turning ▁west . ▁A ▁short ▁distance ▁further ▁down stream , ▁it ▁reaches ▁its ▁confl u ence ▁with ▁the ▁West ▁Branch ▁Sus que h anna ▁River . ▁ ▁D ry ▁Run ▁joins ▁the ▁West ▁Branch ▁Sus que h anna ▁River ▁ ▁up stream ▁of ▁its ▁mouth . ▁ ▁H ydro log y ▁D ry ▁Run ▁is ▁designated ▁as ▁an ▁imp a ired ▁water body . ▁The ▁cause ▁of ▁imp air ment ▁is ▁sed iment ation / s ilt ation . ▁The ▁likely ▁source ▁of ▁imp air ment ▁is ▁agricult ure . ▁ ▁At ▁the ▁point ▁where ▁D ry ▁Run ▁cross es ▁a ▁Con ra il ▁rail road , ▁the ▁stream ' s ▁peak ▁annual ▁dis charge ▁has ▁a ▁ 1 0 ▁percent ▁chance ▁of ▁reaching ▁. ▁It ▁has ▁a ▁ 2 ▁percent ▁chance ▁of ▁reaching ▁ ▁and ▁a ▁ 1 ▁percent ▁chance ▁of ▁reaching ▁. ▁The ▁peak ▁annual ▁dis charge ▁has ▁a ▁ 0 . 2 ▁percent ▁chance ▁of ▁reaching ▁. ▁ ▁At ▁the ▁point ▁where ▁D ry ▁Run ▁cross es ▁Township ▁Route ▁ 6 2 7 , ▁the ▁stream ' s ▁peak ▁annual ▁dis charge ▁has ▁a ▁ 1 0 ▁percent ▁chance ▁of ▁reaching ▁. ▁It ▁has ▁a ▁ 2 ▁percent ▁chance ▁of ▁reaching ▁ ▁and ▁a ▁ 1 ▁percent ▁chance ▁of ▁reaching ▁. ▁The ▁peak ▁annual ▁dis charge ▁has ▁a ▁ 0 . 2 ▁percent ▁chance ▁of ▁reaching ▁. ▁ ▁Geography ▁and ▁ge ology ▁The ▁elev ation ▁near