state route state highway state california connecting sacramento route near lowest sierra nevada forest service parallels western pacific railroad feather river route trail earliest predecessor spur california trail followed railroad built route trail dirt road needed construction later converted present state highway construction highway began involved boring tunnels previously road signed crossing sierra nevada lower elevation interstate road renumbered state highway renumbering today portions upgraded lane expressway freeway locations route description state route begins partial interchange north sacramento close feather river route rail line parallels entire highway heads north lane mix expressway freeway north crossing line freeway second time continues city makes turns overlaps heading north lane road lane freeway begins south ends major connection northwest straight movement construction replace intersection interchange completed november portion begins turns northeast mountains short spurs north paradise crosses double feather river route short lane section runs bridge present merges old road create lake 1960s crossing drops canyon north fork feather river follows usually opposite feather river route results places transportation lines cross river bridge arch bridge crosses lower railroad bridge soon highway tunnels rock formations canyon fair distance canyon formed east branch north fork feather river reaches junction state route near routes overlap southeast point east branch splits highway heads southeast partly creek past leaves valley creek passing feather river route following small rail line passes spring garden tunnel brings valley takes southeast ends state route splits south east large begins community heads directly passing north end south end crossing pass railroad takes descending slightly end portion west state route near eligible designated entire route california freeway expressway system lanes history trails opened trail pass crossing sierra nevada lower elevation existing route california trail split route california trail near roughly followed present passing followed ridges company incorporated july build spanish ranch wagon road bypassed older trail west spanish ranch began collecting tolls november toll road built continuing improvements southwest line law authorized improve portion east county improved road east pass began completed 1870s completed main line california followed old trail east west reached building railroad created dirt road canyon assist construction citizens created push improvements roadway creation year round route existing route ridges closed months winter state highway bond issue passed state voters included route connecting surveyor surveyed route state announced existing ridge route improved debate state legislative road committee included statement route follow amendment authorizing bond issue instead keeping route changed designation extension short route bond issue modern route construction began july convict labor easier portions contractors remainder bridges tunnels slowed great depression difficult portion tunnels built hang rope steep granite slopes repeatedly caused delays commission dedicated road ceremony halfway ends august construction cost million miles new road remainder old trail junction route east added state highway system extension route paved new route created stretching woodland route state route southeast including present route woodland route east pass new state route state route extended southwest woodland oakland end original state route replaced route alternate continued south woodland davis southeast nevada join ends direct route south sacramento added state highway system route later rerouted state route alternate designation short lived replaced state route renumbering southwest alternate instead state ran south state route route point north sacramento new state route came northwest continued south despite ending state route signed state route road garden highway sacramento originally built feather river highway northeast followed present dam boulevard county route present location ran north northeast alongside north fork feather river route covered lake left north meeting present alignment old road flooded million new alignment lanes built west relocated nearby alignment double feather river northwest dam carrying highway rail line dedicated august portions upgraded freeways north early 2010s south split mid-1950s extended farther south late 1960s late 2000s downtown built early 1960s upgraded lane expressway feather river boulevard north county line freeway portion south parkway freeway interchange constructed access lake development previously served intersection road removal intersection effectively upgraded expressway portion freeway south feather river boulevard intersection early 2010s lane segment south expanded lane expressway freeway section bypassing small town east west interchange feather river boulevard lake opened traffic eliminating intersection sacramento major intersections portion route state route state route signed north south route letter measured road based alignment existed time necessarily reflect current mileage reflects realignment route indicates second realignment refers overlap correction change indicates classified temporary list list definitions segments remain relinquished local control omitted numbers reset county lines start end county given county column
California State Route 70