bridge known arch bridge connecticut united_states constructed project located tribal land area fort state park bridge carries traffic road tributary spanning feet brook bridge arch rises feet water according report carries vehicles day listed national_register_of_historic_places design officially referred bridge number state records bridge commonly known south end bridge wooden sign commemorates christian missionary educator colonial period connecticut sign actually declare states explanation site bridge stone arch bridge spans feet brook arch feet water built bridge constructed medium sized laid cement mortar semi circular arch constructed ring stones inches deep built rubble construction structure including wing walls rising feet roadway bridge form low ends total length bridge including feet long preservation plan outlined plan preservation unlikely traffic require replacement modification bridge future according report bridge carries vehicles day biggest threat bridge moisture control repair eroded surfaces stone arch bridges rarely require structural rehabilitation alternative solution structural rehabilitation use concrete slab arch requiring raising roadway report stated quality bridge compatible roadways larger lanes additional width facilitated historical significance importance national_register_of_historic_places nomination states significant example 1930s public works programs example picturesque park architecture early 20th century constructed time masonry popular choice state park structures masonry considered obsolete building material bridge added significance example work conducted federal
Samson Occom Bridge