Dearborn River High Bridge, Spanning Dearborn River, Augusta, Lewis and Clark County, MT

Significance: The King Bridge Company of Cleveland, Ohio constructed this four-span, half-deck Pratt truss over the Dearborn River in 1897. The half-deck configuration of the bridge is unusual in that the floor beams are attached to the vertical members near their mid-points rather than at their top or bottom ends as in the deck and through configurations. The half-deck was a rarely built configuration and this bridge is one of the few remaining examples in the U.S....

Survey number: HAER MT-23

Building/structure dates: 1897 Initial Construction

steel truss bridges bridge construction civil engineering vehicular bridges augusta dearborn high bridge dearborn river high bridge dearborn river lewis montana lewis and clark lewis and clark county expedition the young republic american history historic american engineering record liz jandoli king bridge company jet lowe kevin murphy fredric l quivik photo clark county ultra high resolution high resolution library of congress

1969 - 1980

Library of Congress

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