US Bridges

IH 45 NB over FM 517

Good

Galveston County, Texas · 1.4 MI SE of FM 646 · Structure no. 120850050004358

Built
2001
24 years old
Condition
Good
inspected August 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
274 ft
3 main spans
Daily traffic
48,891
2017 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB over FM 517 is a prestressed concrete stringer/multi-beam or girder carrying IH 45 NB over FM 517 in Galveston County, Texas. It was built in 2001, so it is 24 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 48,891 vehicles a day, roughly 4% of them trucks, projected to reach 59,870 by 2033. The structure is 274 ft (83.5 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIH 45 NB
CrossesFM 517
Location1.4 MI SE of FM 646
RouteInterstate 45
StateTexas
Coordinates29.44914, -95.07693
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length274 ft (83.5 m)
Longest span93 ft (28.3 m)
Deck width60 ft (18.4 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,891 (2017)
Projected traffic59,870 by 2033
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 45 NB over FM 517 built?

It was built in 2001, making it 24 years old in 2025.

What condition is IH 45 NB over FM 517 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2022.

How much traffic does IH 45 NB over FM 517 carry?

About 48,891 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is IH 45 NB over FM 517?

The structure is 274 ft (83.5 m) long with a longest span of 93 ft (28.3 m) and a deck 60 ft wide.

Who owns IH 45 NB over FM 517?

It is owned by the State Highway Agency.