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Karnack Ave over Unnamed drainage

Harrison County, Texas · rated Poor in the 2025 National Bridge Inventory

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

Karnack Ave over Unnamed drainage in Harrison County, Texas, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
It was built in 1950, making it 75 years old at the 2025 inventory.
It carries about 10 vehicles a day (traffic count year 2024).
It is one of 9 of the 269 inventoried bridges in Harrison County rated poor (3.3%); 9 (3.3%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 70 ft
Location	600 N of 51st St
NBI structure number	000021594-68093
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Ih 20 over Draw	1966	38,492	Fair
Ih 20 WB over Roseborough Springs Rd	1965	35,289	Fair
Ih 20 over Cox Creek	1965	35,289	Fair
Ih 20 & WB Exit Rp over Drain	1963	34,230	Good
Ih 20 Ml & Nfr over Big Sis Creek	1936	33,793	Fair
Ih 20 Ml & Nfr over Little Sis Creek	1936	33,793	Fair