Notes:

• Large pipeline suspension bridge located near the Big Soo terminal.

External Links:

• Big Soo terminal

Notes:

• Self-anchored. Carried I-29, I-35, and US71 across the Missouri River. Closed for several months in 2005 for major refurbishment. Reopened, September, 2005. Closed November, 2010. Demolished, July, 2011.

External Links:

• Structurae - Structure ID 20014837

Notes:

• Completed in 1961 or 1962. Removed in late 2006 or 2007.
• Replaced (pipeline bridge) - Jefferson vicinity, South Dakota and Ponca State Park, Nebraska, USA.

Notes:

• Located just below Ryan Dam.

External Links:

• Structurae - Structure ID 20030438

Notes:

• The postcard says "Suspension Bridge. Jefferson, S.D." The bridge pictured here may be a predecessor to the current pipeline suspension bridge at Ponca, Nebraska, eight miles west of Jefferson. Patrick S. O'Donnell visited this area in 2006 to photograph the Ponca bridge, but could not locate a pipeline bridge matching the postcard.
• In late 2006, Pete Rissell writes that one of the piers from this pipeline bridge is still visible in the middle of the Missouri River: "In the early 1970s I visited the Ponca State Park and noticed a single concrete bridge support in the middle of the Missouri River. I always thought it was strange because there were no abandoned road or rail right-of-ways in that location... I'm sure that this concrete support matches the one in the foreground shown on your website's postcard labeled "Suspension Bridge, Jefferson SD". My guess is that the current Ponca Pipeline bridge (photographed in 2006) is the replacement because the former suspension bridge had to be relocated due to river flooding. The old concrete support is located approximately 1 mile up-river (to the northwest) from the current pipeline bridge." This pier is visible in satellite imagery at the location provided with this inventory entry.
• In 2009, Dale Harkness writes: "I grew up on a farm only a few miles from the existing pipeline. I believe you are correct that the cement pier does belong to the original gas pipeline. My aunt told me that my grandfather was present while the bridge was being constructed. From my understanding, my grandfather had been filming the construction and almost photographed an unusual event where one of the piers crashed down to the ground after a failed attempt to raise it using a pivot." Dale also provided photos of the construction of the newer bridge in 1961.
• The replacement span appears to have been demolished in late 2006 or 2007.
• Replaced by 1961 (pipeline bridge) - Jefferson vicinity, South Dakota and Ponca State Park, Nebraska, USA.

External Links:

• Structurae - Structure ID 20030104

Notes:

• Completed early 1890s.
• 1908, June: Destroyed by flood.

External Links:

• Black Eagle Dam - Wikipedia. From the article (retrieved 2021): "A 200-foot-long (61 m), 10-foot-wide (3.0 m) pedestrian suspension bridge ran from the bluffs above each powerhouse over the river." However, historic images of the bridge show it wa significantly longer with main and side spans of roughly 400 and 200 feet respectively.
• Bridgehunter.com | Eagle Falls Suspension Bridge