▁and ▁reg ained ▁its ▁status ▁as ▁a ▁town ▁on ▁March ▁ 2 1 , ▁ 1 8 9 9 , ▁after ▁the ▁refer endum ▁that ▁approved ▁the ▁change ▁was ▁invalid ated ▁by ▁a ▁court ▁r uling . ▁ ▁In ▁its ▁past , ▁D over ▁has ▁had ▁extensive ▁iron ▁and ▁mill ▁works , ▁machine ▁sh ops , ▁st ove , ▁furn ace , ▁and ▁range ▁works , ▁bo iler ▁and ▁bridge ▁works , ▁rolling ▁mill s , ▁dr ill ▁works , ▁kn itting ▁and ▁sil k ▁mill s , ▁and ▁a ▁large ▁hos ier y ▁factory ▁( Mac G reg ors ). ▁During ▁this ▁period , ▁D over ▁was ▁a ▁port ▁on ▁the ▁Morris ▁Canal ▁while ▁it ▁was ▁oper ational ; ▁the ▁boat ▁bas in ▁was ▁located ▁at ▁what ▁is ▁today ▁the ▁J F K ▁Commons ▁Park . ▁ ▁S ources ▁attribute ▁the ▁town ' s ▁name ▁to ▁D over , ▁England ▁or ▁D over , ▁New ▁Ham pshire . ▁ ▁Geography ▁According ▁to ▁the ▁United ▁States ▁Census ▁Bureau , ▁the ▁town ▁had ▁a ▁total ▁area ▁of ▁ 2 . 7 3 0 ▁square ▁miles ▁( 7 . 0 7 0   km 2 ), ▁including ▁ 2 . 6 8 4 ▁square ▁miles ▁( 6 . 9 5 1   km 2 ) ▁of ▁land ▁and ▁ 0 . 0 4 6 ▁square ▁miles ▁( 0 . 1 1 9   km 2 ) ▁of ▁water ▁( 1 . 6 8 %). ▁ ▁The ▁bor ough ▁borders ▁the ▁Morris ▁County ▁municipal ities ▁of