Home › Florida › Martin County › SR91 N/S Tpk 138.1 over County Line Cana

SR91 N/S Tpk 138.1 over County Line Canal C-23

Martin County, Florida · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

SR91 N/S Tpk 138.1 over County Line Canal C-23 in Martin County, Florida, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1957 and reconstructed in 2007, making it 68 years old at the 2025 inventory.
It carries about 59,900 vehicles a day (traffic count year 2023).
It is one of 34 of the 129 inventoried bridges in Martin County rated fair (26.4%); 1 (0.8%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 327 ft
Location	3.4MI North of SR-714
NBI structure number	890083
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.

Bridge	Built	Vehicles/day	Condition
I-95 (SR-9) over Drainage Ditch	1987	111,500	Good
Sr-9(i-95) over Drainage Ditch	1987	103,500	Good
I-95 (SR-9) over Hanson Grant Outlet	1987	74,500	Fair
SR 91 Tpk 137.25 over Drainage Ditch	1957	59,900	Good
SR91 N/S Tpk 135.6 over Bessey Creek	1957	59,900	Fair
SB I-95 (SR 9) over CR 708	1986	55,750	Good