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Ih 37 SB over Loop 1604

Bexar County, Texas · rated Fair in the 2025 National Bridge Inventory

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

Ih 37 SB over Loop 1604 in Bexar County, Texas, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1968, making it 57 years old at the 2025 inventory.
It carries about 19,082 vehicles a day (traffic count year 2019).
Its listed owner is the state highway agency.
It is one of 1,088 of the 2,356 inventoried bridges in Bexar County rated fair (46.2%); 8 (0.3%) 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	Continuous steel stringer or multi-beam girder
Length	about 250 ft
Location	Ih 37 @ Loop 1604
NBI structure number	150150007309092
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Ih 410 over Drain	2008	302,626	Fair
Ih 410 over Drain	2000	286,681	Good
Ih 410 Ml & Wbfr over Drain	1976	249,750	Fair
Ih 410 Ml & Wbfr over Draw	1957	249,750	Fair
Ih 10 over Rock Creek	1960	223,977	Fair
Ih 10 over Drain	1960	223,977	Good