- 1884: 104 miles completed from Waterloo to Des Moines, Iowa by the Wisconsin, Iowa and Nebraska Railway
- 1886: WI&N sold to the Chicago, St. Paul & Kansas City Railway
- 1887: 27 miles completed from Oelwein to Waterloo, Iowa by the Chicago, St. Paul & Kansas City Railway
- 1888: 159 miles completed from Des Moines, Iowa to St. Joseph, Missouri by the Chicago, St. Paul & Kansas City Railway
- 1890: 23 miles completed from St. Joseph, Missouri to Beverly, Missouri by the Leavenworth & St. Joseph Railway
- 1892: L&StJ merged into the Chicago, St. Paul & Kansas City Railway, trackage rights obtained over the Union Pacific and Missouri Pacific into Kansas City
- 1893: CStP&KC sold to the Chicago Great Western Railway
- 1909: Chicago Great Western Railway becomes the Chicago Great Western Railroad
- 1968: Chicago Great Western purchased by the Chicago & North Western Railway
- 1984: Des Moines to St. Joseph segment abandoned due to acquisition of parallel Rock Island "Spine Line"
- 1985: Bondurant to Marshalltown segment abandoned
- 1985: Cedar Falls to Cedar Falls Junction segment abandoned
- 1986: St. Joseph to Kansas City segment abandoned
- 1989: Marshalltown to Cedar Falls Junction segment abandoned
- 1995: C&NW purchased by Union Pacific Railroad
- 2001: Bell Avenue Industrial Lead in Des Moines abandoned
- 2011: Bondurant Industrial Lead abandoned
- 1987-Present: Chicaqua Valley Trail uses the railroad grade from I-80 north of Des Moines to Baxter
- 1992-Present: Great Western Trail uses the railroad grade from Des Moines to Martensdale
- 1995-Present: Union Pacific leases the Cedar Falls to Oelwein segment to the Iowa Northern Railroad
- 1995-Present: Union Pacific operates small segments of the former route in Des Moines and Kansas City
Located near the whistle stop of Santiago, this small beam and trestle bridge crosses Ditch #38.
Little is known about the history of the bridge, although it appears that the beam span was installed to replace two or three other trestle spans, possibly in the 1970s. The beam span is approached by trestle on either side, and sits on steel pilings.
It is possible that the beam also may have come from somewhere else. Empty holes at the end of the span possibly indicate this.
Overall, the bridge appears to be in fair condition, with some deterioration noted on the timber components of the bridge.
The author has ranked the bridge as being minimally significant, due to the common design.
The photo above is an overview.