Text from the National Historical Register

The Colorado River Bridge is a 1,285 foot-long concrete and steel structure with three steel truss spans, concrete piers and a long concrete approach at its west end. The bridge roadway is 20 feet wide and it crosses the Colorado River as state highway Loop 150 two blocks west of the Bastrop Commercial Historic District (N.R. 1978). While the Colorado River is normally contained within a 200-foot-wide channel 60 feet beneath the roadway, the bridge spans a much broader wooded flood plain.

The three bridge spans over the river bed consist of identical Parker through trusses, each 192 feet in length, supported on broad tapered concrete piers between spans. The riveted steel Parker trusses have a gently arced top chord, divided into seven sections by vertical struts.

Bids on the project were solicited and the Kansas City Bridge Co. was selected as contractor.

Latitude: 30.109746
Longitude: -97.322721
http://www.mapquest.com/maps/map.adp?searchtype=address&formtype=latlong&latlongtype=decimal&latitude=30.109746&longitude=-97.322721

Sources:

http://atlas.thc.state.tx.us/common/viewform.asp?atlas_num=2090001031&site_name=Colorado%20River%20Bridge%20at%20Bastrop&class=2001
http://www.historicbridgefoundation.com/ipages/texas/prairies/bastrop/coloradoriver.html
http://en.wikipedia.org/wiki/Colorado_River_Bridge_at_Bastrop