From the highest elevation to lowest, here are views of bridges crossing Deer Creek along with some history.
Boulder Street Bridge, Nevada City – Elevation 2,512′
(Near Lefty’s Grill & the Stone House)
Pine Street Bridge, Nevada City – Elevation 2,445′
Tribute Trail – Angkula Seo Suspension Bridge – Elevation 2,400′
(built by Seattle Bridge LLC)
Tribute Trail – Chinese Tribute Bridge – Stocking Flat (Champion Mine) – Elevation 2,247′
Bitney Springs – Cotton Brothers Bridge – Elevation 2,010′
“NEVADA CITY, CAL – Cotton Bros. & Co, Oakland, CAL were awarded a contract April 14 by the county supervisors for constructing the following bridges; steel bridge over Deer Creek, $2,248.” – Engineering News and American Railway Journal, Volume 39, April 28, 1898, pg. 145
“The Cotton Brothers and Company was an important California based bridge builder of metal truss bridges in the late nineteenth century and early twentieth century. They built several bridges in Nevada County during the 1890’s, including the Purdon Bridge.” – Historic American Building Survey, National Park Service – Wolf Creek Bridge PDF

Resources:
American Bridge Building Companies PDF
Bridgehunter.com – Cotton Brothers Bridges
Bear Yuba Land Trust – Deer Creek Environs Trail
Historic American Building Survey, National Park Service – Wolf Creek Bridge PDF
Installation of Chinese Tribute Bridge (Champion Mine area).
The Sierra Fund – Deer Creek Tribute Trail
South Yuba River State Park – California Bridges – Purdon Bridge
Titus Davis, Loadstone Drone
Tribute Trail Building
The Union – Through the years: Deer Creek’s many bridges