US Bridges

IH 45 NB over Spur 342

Fair

Galveston County, Texas · 1.50 MI E of FM 188 · Structure no. 120850050001206

Built
1976
49 years old
Condition
Fair
inspected August 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
330 ft
6 main spans
Daily traffic
14,490
2013 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB over Spur 342 is a prestressed concrete stringer/multi-beam or girder carrying IH 45 NB over Spur 342 in Galveston County, Texas. It was built in 1976, so it is 49 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 14,490 vehicles a day, roughly 4% of them trucks, projected to reach 20,290 by 2033. The structure is 330 ft (100.6 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 45 NB
CrossesSpur 342
Location1.50 MI E of FM 188
RouteInterstate 45
CountyGalveston County
StateTexas
Coordinates29.2885, -94.83794
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length330 ft (100.6 m)
Longest span61 ft (18.6 m)
Deck width59 ft (18.1 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,490 (2013)
Projected traffic20,290 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 45 NB over Spur 342 built?

It was built in 1976, making it 49 years old in 2025.

What condition is IH 45 NB over Spur 342 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2022.

How much traffic does IH 45 NB over Spur 342 carry?

About 14,490 vehicles per day (2013 count), of which roughly 4% are trucks.

How long is IH 45 NB over Spur 342?

The structure is 330 ft (100.6 m) long with a longest span of 61 ft (18.6 m) and a deck 59 ft wide.

Who owns IH 45 NB over Spur 342?

It is owned by the State Highway Agency.