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SH 146 SB Fr over Drainage Ditch 7B

Galveston County, Texas · rated Good in the 2025 National Bridge Inventory

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

SH 146 SB Fr over Drainage Ditch 7B in Galveston County, Texas, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1985, making it 40 years old at the 2025 inventory.
It carries about 6,150 vehicles a day (traffic count year 2016).
Its listed owner is the state highway agency.
It is one of 189 of the 340 inventoried bridges in Galveston County rated good (55.6%); 9 (2.6%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 180 ft
Location	0.15 Mi S of Lp 197
NBI structure number	120850038906079
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
IH 45 MLs & FRs over Clear Crk Trib	1998	171,700	Good
Ih 45 over FM 518	2020	144,300	Good
Ih 45 Nbml over FM 646	2020	115,900	Good
Ih 45 Sbml over FM 646	2020	115,900	Good
Ih 45 Nbml over Magnolia Bayou	2020	115,900	Good
Ih 45 SB over Magnolia Bayou	2022	115,900	Good