Ottumwa (BNSF/CPKC)

Ottumwa offers a rare combination for Midwestern railfanning: an at-grade diamond crossing between two Class I railroads, an Amtrak station stop, and a notoriously steep grade — all within walking distance of downtown. The BNSF Ottumwa Subdivision (former Chicago, Burlington & Quincy mainline) runs east-west on double track through the Des Moines River valley. CPKC's Ottumwa Subdivision (former Milwaukee Road) crosses it at grade near West Second Street, creating an interlocking that sees near-constant activity.

CPKC uses Ottumwa as a crew change point, so northbound trains often pause at the yard (milepost 302.8) before crossing the BNSF diamond at milepost 301.5 and tackling the 1.6% Rutledge Hill grade out of the valley. This makes Ottumwa one of the best spots in Iowa to watch trains negotiate a challenging grade from a standstill. The Amtrak station at 210 W Main Street is adjacent to the BNSF main, and the California Zephyr stops daily — eastbound around 9:07 AM and westbound around 6:57 PM.

The best public vantage point is the Jefferson Street Viaduct, a historic 1936 Warren deck truss bridge that spans the railroad tracks and the Des Moines River at a height that provides a clear overhead view of train movements on both railroads. The area near the North Quincy Avenue crossing also provides grade-level viewing of CPKC trains.

Ottumwa sits in the broad Des Moines River valley in southeastern Iowa, at an elevation of roughly 650 feet. The river curves through the center of town, and the BNSF main tracks parallel the north bank before crossing the water east of downtown. The surrounding terrain consists of rolling farmland and wooded bluffs typical of southern Iowa. The Jefferson Street Viaduct, a 2,120-foot-long steel truss structure completed in 1936 and listed on the National Register of Historic Places, dominates the riverfront and provides an elevated perspective over the rail corridor.

Downtown Ottumwa has a gritty, working-class character with brick commercial buildings, the six-story Hotel Ottumwa (built 1917), and the Wapello County Courthouse (1894, Richardsonian Romanesque). The industrial atmosphere is punctuated by the constant sound of grade crossing bells and the rumble of trains — BNSF on the east-west corridor and CPKC climbing or descending Rutledge Hill to the south. On cold winter mornings, exhaust plumes from locomotives on the steep grade are visible across town.

The BNSF Ottumwa Subdivision handles heavy freight traffic running between Galesburg, Illinois, and Creston, Iowa. Based on webcam data from the same subdivision at Burlington, approximately 25-30 trains pass through in a 24-hour period. The traffic mix includes intermodal, manifest freight, unit grain, coal, and ethanol trains. BNSF operates two main tracks through Ottumwa.

CPKC's Ottumwa Subdivision has seen significant traffic growth since the CP-KCS merger. In 2019, Ottumwa averaged about 5 trains per day; by early 2025, counts reached approximately 9-12 per day. The traffic includes the Midwest Mexico Express (MMX) intermodal trains (180/181), manifest, grain, potash, and tank trains. CPKC performs crew changes at Ottumwa, so northbound trains frequently stop before crossing the BNSF diamond and ascending Rutledge Hill. A connecting track between the two railroads uses BNSF Track 2.

Amtrak's California Zephyr (trains 5 westbound and 6 eastbound) makes daily stops. FY2024 ridership at Ottumwa was 8,719 passengers, generating $832,196 in ticket revenue. The station is staffed with an Amtrak shelter and platform adjacent to the BNSF main.

The Jefferson Street Viaduct is the premier photography location. This 2,120-foot Warren deck truss bridge crosses both the BNSF tracks and the Des Moines River, providing elevated shots looking down on trains from the south approach. Morning light illuminates eastbound BNSF trains, while late afternoon light favors westbound movements. A 70-200mm lens captures trains framed against the river and downtown buildings.

For the CPKC diamond, the area near the North Quincy Avenue grade crossing offers grade-level shots of CPKC trains crossing the BNSF interlocking and beginning the climb up Rutledge Hill. A wide-angle lens (24-35mm) captures the full scene of trains transitioning between the two railroads at the diamond. The steep Rutledge Hill grade south of the diamond provides dramatic exhaust shots of CPKC power working hard, particularly in cold weather or with heavy trains.

The Amtrak platform at 210 W Main Street allows platform-level shots of the California Zephyr with the 1951 limestone depot in the background. The Wapello County Historical Society now occupies most of the station building, and the distinctive Modernist architecture with Lannon stone exterior makes an attractive backdrop. The riverfront trail south of the tracks offers water-reflection shots during golden hour, especially with BNSF trains on the bridge east of downtown.

Ottumwa has been a railroad junction since the Burlington and Missouri River Railroad (B&M) arrived from Burlington, Iowa, in 1859. The city served as the western terminus of the B&M until after the Civil War, when track was extended to the Missouri River by 1869. The Chicago, Burlington & Quincy (CB&Q) — ancestor of today's BNSF — took over the B&M in 1875 and built a combination depot in 1889, designed by the Burnham and Root architectural firm.

The Chicago, Milwaukee, St. Paul & Pacific Railroad (Milwaukee Road) established the north-south route through Ottumwa as part of its Kansas City line, reaching KC in 1887. After the Milwaukee Road's bankruptcy and absorption into the Soo Line (1986), this became part of Canadian Pacific, now CPKC after the 2023 merger with KCS — creating the first single-line railroad spanning Canada and Mexico.

The current Amtrak depot was completed in 1951 by Benson Construction Company, designed by Holabird, Root & Burgee of Chicago in a Modernist style with Lannon stone cladding. It was listed on the National Register of Historic Places in 2008 and became part of the Historic Railroad District in 2011. The Jefferson Street Viaduct (1935-36), designed by the Iowa State Highway Commission and built by Wisconsin Bridge & Iron Company, was listed on the NRHP in 1998.

Ottumwa's defining railfan feature is the at-grade diamond where two Class I railroads cross — BNSF's busy east-west corridor and CPKC's growing north-south "NAFTA Highway." The 1.6% Rutledge Hill grade immediately south of the diamond creates dramatic operational challenges: in January 2024, a CPKC merchandise train stalled on the grade in snowy conditions and slid backward toward the diamond, narrowly stopping 20 feet short of a BNSF train occupying the interlocking. This incident was captured on the Steel Highway webcam (located at milepost 301.1) and widely covered in railroad media.

Post-merger CPKC traffic growth has transformed Ottumwa from a quiet crossing into an increasingly busy junction. The STB merger approval noted that CPKC traffic was projected to grow from roughly 5 trains/day to 19 trains/day, with infrastructure improvements including extension of the Ottumwa siding to 12,000 feet. Combined with BNSF's mainline traffic and Amtrak service, the location now offers exceptional variety within a compact area accessible entirely on foot from the historic downtown.