US Bridges

IH 45 Sbml over Spring CR

Fair

Montgomery County, Texas · At Harris C/L · Structure no. 121700011004119

Built
1990
35 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
835 ft
1 main span
Daily traffic
243,893
2023 count
Owner
State
State Highway Agency

About this bridge

IH 45 Sbml over Spring CR is a steel continuous stringer/multi-beam or girder carrying IH 45 Sbml over Spring CR in Montgomery County, Texas. It was built in 1990, so it is 35 years old, younger 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 243,893 vehicles a day, roughly 7% of them trucks, projected to reach 341,450 by 2042. The structure is 835 ft (254.5 m) long and 107 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 45 Sbml
CrossesSpring CR
LocationAt Harris C/L
RouteInterstate 45
CountyMontgomery County
StateTexas
Coordinates30.11119, -95.43681
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+7 approach)
Design loadHS 20
Structure length835 ft (254.5 m)
Longest span150 ft (45.7 m)
Deck width107 ft (32.7 m)
Roadway width93 ft (28.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic243,893 (2023)
Projected traffic341,450 by 2042
Trucks7%
Lanes on structure7
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 45 Sbml over Spring CR built?

It was built in 1990, making it 35 years old in 2025.

What condition is IH 45 Sbml over Spring CR 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 September 2024.

How much traffic does IH 45 Sbml over Spring CR carry?

About 243,893 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is IH 45 Sbml over Spring CR?

The structure is 835 ft (254.5 m) long with a longest span of 150 ft (45.7 m) and a deck 107 ft wide.

Who owns IH 45 Sbml over Spring CR?

It is owned by the State Highway Agency.