Scenic Bridge

{{Use mdy dates|date=August 2023}}

{{Infobox NRHP

| name = Scenic Bridge

| nrhp_type =

| image=Scenic Bridge, Spanning Clark Fork at Old Highway 10, Tarkio vicinity (Mineral County, Montana).jpg

| caption =

| location = Milepost 0 on Old U.S. Route 10 West, about {{Convert|4|mi}} east of Tarkio, Montana

| coordinates = {{coord|47|01|12.4|N|114|39|25.5|W|display=inline,title,source:NRIS2010a}}

| locmapin = Montana#USA

| built = 1928

| builder = William P. Roscoe Company

| architecture = Pratt deck truss

| added = January 4, 2010

| area = {{Convert|2|acre|ha}}

| mpsub = Montana's Historic Steel Truss Bridges

| refnum =09001183{{NRISref|version=2010a}}

}}

The Scenic Bridge crossing Clark Fork River about {{Convert|4|mi}} east of Tarkio in Mineral County, Montana, was built in 1928. It is located at Milepost 0 on Old U.S. Route 10 West. The bridge has also been denoted 24MN304 and MDT No. L31012000+08. It was listed on the National Register of Historic Places in 2010.

The bridge is a riveted Pratt deck truss bridge constructed in 1928. It has three main spans upon reinforced concrete abutments and piers. The bridge is {{convert|421|ft|m}} long in total, with four {{convert|19|ft|m}} approach spans, two {{convert|77|ft|m}} deck truss spans, and a {{convert|191|ft|m}} deck truss main span. It is {{convert|25|ft|m}} wide, supporting a {{convert|24|ft|m}} roadway.{{cite web|url={{NRHP url|id=09001183}}|title=National Register of Historic Places Registration: Scenic Bridge / 24MN304, MDT No. L31012000+08 |publisher=National Park Service|author=Jon Axline |date=May 13, 2009 |access-date=September 6, 2017}}

This Pratt deck truss design is visually pleasing and rare. It was chosen by state staff for relatively rare circumstances during 1928 to 1932, after which a version of a Warren truss design was used.