▁National ▁Register ▁of ▁Historic ▁Places . ▁ ▁Notable ▁projects ▁ ▁Tre ma ine ▁Bridge ▁( 1 9 0 2 ), ▁ 2 8 0 th ▁Street ▁over ▁the ▁Bo one ▁River , ▁Web ster ▁City , ▁Iowa , ▁NR HP - list ed ▁State ▁Street ▁Bridge ▁( 1 9 0 3 ), ▁East ▁State ▁Street ▁over ▁Will ow ▁Creek , ▁Mason ▁City , ▁Iowa , ▁NR HP - list ed ▁Cal am us ▁Creek ▁Bridge ▁( 1 9 0 5 ), ▁a ka ▁ 3 2 5 th ▁Street ▁Bridge , ▁ 3 2 5 th ▁Street ▁over ▁Cal am us ▁Creek , ▁Max well , ▁Iowa , ▁NR HP - list ed ▁S qu aw ▁Creek ▁Bridge ▁( 1 9 0 8 ), ▁over ▁S qu aw ▁Creek ▁in ▁Am es , ▁Iowa ▁H oney ▁Creek ▁Bridge ▁( 1 9 1 0 ), ▁over ▁H oney ▁Creek ▁at ▁ 1 0 5 th ▁Street , ▁near ▁Bang or , ▁Iowa ▁Min erva ▁Creek ▁Bridge ▁( 1 9 1 0 ), ▁County ▁Road ▁S 5 2 ▁over ▁Min erva ▁Creek , ▁C lem ons , ▁Iowa , ▁NR HP - list ed ▁V ine ▁Street ▁Bridge ▁( 1 9 1 0 ), ▁South ▁V ine ▁Street ▁over ▁Ot ter ▁Creek , ▁West ▁Union , ▁Iowa , ▁NR HP - list ed ▁East ▁Indian ▁Creek ▁Bridge ▁( 1 9 1 2 ), ▁ 2 6 0 th ▁Street ▁over ▁East ▁Indian ▁Creek , ▁Nev ada , ▁Iowa , ▁NR HP - list ed ▁E