▁ 1 9 th ▁centuries . ▁It ▁consisted ▁of ▁three ▁islands ▁and ▁a ▁mill , ▁now ▁sub mer ged ▁under ▁the ▁Occ o qu an ▁due ▁to ▁higher ▁water ▁levels ▁following ▁dam ming ▁for ▁flo od ▁control , ▁water ▁supply , ▁and ▁power ▁generation . ▁ ▁Between ▁c . ▁ 1 9 0 0 ▁and ▁ 1 9 7 6 , ▁it ▁was ▁frequently ▁called ▁" Occ o qu an ▁Creek ," ▁but ▁a ▁campaign ▁to ▁restore ▁its ▁status ▁as ▁a ▁river ▁was ▁successfully ▁conducted ▁by ▁Ros em ary ▁Sele c man . ▁ ▁D ams ▁ ▁The ▁Occ o qu an ▁has ▁three ▁d ams ▁along ▁its ▁length . ▁The ▁first ▁is ▁at ▁the ▁town ▁of ▁Occ o qu an , ▁a ▁res er voir ▁belonging ▁to ▁the ▁Fair f ax ▁County ▁Water ▁Author ity , ▁which ▁serves ▁as ▁a ▁source ▁of ▁drink ing ▁water ▁for ▁parts ▁of ▁Fair f ax ▁and ▁Prince ▁William ▁count ies . ▁The ▁Occ o qu an ▁Res er voir ▁st ret ches ▁from ▁Occ o qu an ▁to ▁Bull ▁Run . ▁Further ▁up river ▁is ▁Lake ▁Jackson . ▁The ▁dam ▁that ▁creates ▁Lake ▁Jackson ▁is ▁at ▁Virginia ▁State ▁Route ▁ 2 3 4 , ▁Dum f ries ▁Road , ▁and ▁is ▁a ▁former ▁hydro elect ric ▁facility . ▁Today ▁the ▁dam ▁contains ▁the ▁lake , ▁but ▁has ▁not ▁produced ▁electric ity ▁in ▁several ▁dec ades . ▁There ▁is ▁a ▁third ▁dam ▁up ▁Broad ▁Run ▁from ▁its ▁confl u ence ▁with ▁C ed ar ▁Run ; ▁this