US Bridges

IH 45 NB over SH 31

Fair

Navarro County, Texas · IH 45 at SH 31 · Structure no. 181750009206180

Built
1964
61 years old, rebuilt 2018
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
160 ft
4 main spans
Daily traffic
20,382
2023 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB over SH 31 is a prestressed concrete stringer/multi-beam or girder carrying IH 45 NB over SH 31 in Navarro County, Texas. It was built in 1964 and reconstructed in 2018, so it is 61 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 5 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 20,382 vehicles a day, roughly 23% of them trucks, projected to reach 24,360 by 2033. The structure is 160 ft (48.8 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIH 45 NB
CrossesSH 31
LocationIH 45 at SH 31
RouteInterstate 45
CountyNavarro County
StateTexas
Coordinates32.09829, -96.44104
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span45 ft (13.7 m)
Deck width62 ft (18.9 m)
Roadway width58 ft (17.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,382 (2023)
Projected traffic24,360 by 2033
Trucks23%
Lanes on structure2
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 SH 31 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2018.

What condition is IH 45 NB over SH 31 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 November 2023.

How much traffic does IH 45 NB over SH 31 carry?

About 20,382 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is IH 45 NB over SH 31?

The structure is 160 ft (48.8 m) long with a longest span of 45 ft (13.7 m) and a deck 62 ft wide.

Who owns IH 45 NB over SH 31?

It is owned by the State Highway Agency.