▁distance ▁of ▁ ▁by ▁river . R ose , ▁p . ▁ 1 0 9 ▁ ▁In ▁ 1 9 2 6 , ▁Stock ton ▁po o led ▁its ▁fin ances ▁with ▁the ▁federal ▁and ▁state ▁govern ments ▁for ▁a ▁total ▁of ▁$ 8 . 2 ▁million . ▁Const ruction ▁on ▁the ▁channel , ▁which ▁included ▁w iden ing ▁and ▁deep ening ▁the ▁river bed ▁and ▁cutting ▁off ▁me and ers ▁and ▁ox bow ▁la kes , ▁began ▁in ▁earnest ▁in ▁ 1 9 2 8 . ▁These ▁included ▁major ▁cut s ▁at ▁Hog ▁Island , ▁Ven ice ▁Island ▁and ▁Man dev ille ▁Island , ▁plus ▁five ▁more ▁smaller ▁straight ening ▁projects . ▁The ▁navigation ▁project ▁short ened ▁the ▁river ▁length ▁by ▁ ▁and ▁deep ened ▁it ▁to ▁. ▁Add itional ▁deep ening ▁work ▁was ▁carried ▁out ▁in ▁ 1 9 6 8 ▁and ▁ 1 9 8 2 . ▁Today , ▁the ▁navigation ▁channel , ▁known ▁as ▁the ▁Stock ton ▁Deep ▁Water ▁Sh ip ▁Channel , ▁can ▁handle ▁fully ▁loaded ▁vessels ▁of ▁up ▁to ▁ ▁and ▁up ▁to ▁ ▁long . ▁However , ▁the ▁navigation ▁works ▁have ▁unexpected ly ▁led ▁to ▁low ▁dissol ved ▁o xygen ▁levels ▁in ▁the ▁lower ▁San ▁Jo aqu in ▁River , ▁which ▁has ▁hurt ▁fish ▁populations . ▁This ▁is ▁believed ▁to ▁be ▁a ▁result ▁of ▁the ▁combination ▁of ▁the ▁ab rupt ▁geometry ▁change ▁from ▁the ▁shall ow ▁river ▁up stream ▁of ▁Stock ton ▁to ▁the ▁deep ▁water ▁channel , ▁in ▁addition ▁to ▁poll ution ▁from ▁the ▁har