The City of Hawkinsville was a paddle steamer, built around 1886, and scuttled in the Suwannee River between 1922-1924. The vessel was reported to be 140 feet long by 30 feet wide. The City of Hawkinsville plied the route between Cedar Key and Branford Florida, with stops at various embankments, mills, and landings.
The general consensus is that the City of Hawkinsville was abandoned due to the rise of the railroads, and the loss of it's usefulness. The brochure (linked below has this to say): "Although accounts of her last days vary, official registry records indicate that she was in service until May 19, 1922". That date is about 6 months before the effort to build a passenger bridge (between Fanning Springs and Old Town) was launched, and about 16 months before the dedication of the "Three Counties Bridge".
The "Three Counties Bridge" was constructed using components donated by the Cummer Cypress Company's bridge at Fowlers Bluff (which they no longer needed, and likely wanted it to go away). The bridge at Fowlers Bluff (all the timbers and the steel swing span section) had to be moved about 17-18 miles to the new location. The obvious method would have been via the river, as roads in 1922 were poor.
A present day river nautical chart suggests that "MINIMUM VERT CL 5 FT.". None of the three concrete bridge spans have such a small vertical clearance. The Wilcox railroad trestle, other than during periods of extreme flood, is listed as minimum vertical clearance of 5-15 feet, depending on river levels. The one existing picture of the Three Counties Bridge suggests it may have a least clearance of 5-feet. Current USGS documents say the two concrete spans have vertical clearances of 15-30 feet, depending on river levels.
Since the US Coast Guard took over navigation rulemaking on the Suwannee River, the old railroad trestle (last owned by CSX, now under the control of Florida DEP) had a requirement to be opened on 5-days notice. As there were no requests for opening since 1981, that was amended in 1999 "to be restored to operable condition based on notice from the district commander, within 6 months". This bridge is not on the FDOT bridge list, so presumably someone else is periodically inspecting it. It has now, as of 2025, been 44 years since the last request to open the span.
Vertical bridge clearances, especially during times of river high water levels, may have trapped the City of Hawkinsville between the two spans. Prior to 1923, it could have made it south to Cedar Key and north to Wilcox (or beyond if the river was low enough). The only impediment was the swing span of the Cummer Cypress bridge at Fowlers Bluff. My own personal view, is that as of 1920-1921 (with the advent of the motor vehicle and the number of them increasing, the owner of the City of Hawkinsville saw the writing on the wall. It's days were numbered. The need to move various sections of the Fowlers Bluff bridge could have been the final use of the City of Hawkinsville. The bridge timbers could have been moved like most other timber products, but the (believed to be 90-100 foot long) swing span, is more likely to have required a barge, and to be towed up the river. There is no documentation to back this up, but it seems a likely story to what happened. That the boiler is missing from the abandoned hull, may also tie in, if the boiler was needed to operate the swing span on the Three Counties Bridge.
Anyone with more information about this subject, please contact me via the comments.
Wikipedia - City of Hawkinsville (shipwreck)
Florida Museums of the Sea brochure This document contains a history of navigation on the Suwannee River.
USCG river navigation information
CFR concerning opening of the span at mile 35