▁of ▁the ▁Pri py at ▁River , ▁which ▁flows ▁through ▁Ukraine ▁and ▁Bel arus . ▁The ▁H ory n ▁is ▁ ▁long , ▁and ▁has ▁a ▁d rain age ▁bas in ▁of ▁. ▁It ▁has ▁a ▁maximum ▁width ▁of ▁ 8 0 ▁m , ▁and ▁a ▁maximum ▁depth ▁of ▁ 1 6 ▁m . ▁An ▁important ▁trib ut ary ▁of ▁the ▁H ory n ▁River ▁is ▁the ▁Sl uch ▁River . ▁ ▁The ▁H ory n ▁River ▁takes ▁its ▁source ▁in ▁the ▁T ern op il ▁O blast ▁of ▁Ukraine , ▁south ▁of ▁the ▁city ▁of ▁Kre men ets , ▁located ▁north ▁of ▁the ▁administrative ▁center ▁of ▁the ▁T ern op il ▁O blast , ▁T ern op il . ▁The ▁river ▁then ▁flows ▁north , ▁where ▁it ▁makes ▁s - shape ▁form ations , ▁through ▁the ▁Ukrain ian ▁ob last s ▁of ▁K hm eln it sky ▁and ▁Riv ne . ▁The ▁river ▁then ▁flows ▁n ortheast ▁into ▁the ▁Bel arus ian ▁v ob last ▁of ▁Br est , ▁where ▁it ▁finally ▁flows ▁into ▁the ▁Pri py at ▁River . ▁ ▁The ▁atomic ▁power ▁plant ▁K hm el ny t sky i , ▁located ▁in ▁the ▁proxim ity ▁of ▁the ▁city ▁of ▁Net ish yn , ▁uses ▁water ▁from ▁the ▁H ory n ▁River ▁for ▁its ▁cool ing ▁processes . ▁ ▁Before ▁the ▁river ▁was ▁dam med , ▁which ▁created ▁poll ution , ▁it ▁was ▁used ▁for ▁ir rig ation ▁and ▁fish ing . ▁A ▁clean - up ▁effort ▁in ▁September ▁