[2] In 1864 the Board of Commissioners of Boise County, Idaho Territory, granted John McLellan and William Thompson a license to operate a ferry across the Boise River at a point on the Oregon Trail near the current location of the Ninth Street Bridge.

[8] In 1912 a 10-pound box of dynamite was left on a pier under the bridge, but police uncovered no plan for demolition.

[9] The middle pier under the bridge was fortified in 1926 with 600 tons of rock to repair damage caused by the Boise River.

[10] In 1928 engineers repaired the center pier again after discovering what the Idaho Statesman termed "vast caverns and yawning spaces" in the center support, when the block of concrete was found to be "hanging from the steel work just like a ring from a Spanish dancer's ear lobe.

[2] Media related to Ninth Street Bridge (Boise, Idaho) at Wikimedia Commons