US Bridges

IH 45 NB over Lp 336

Fair

Montgomery County, Texas · 1.00 MI N of Creightn RD · Structure no. 121700067508208

Built
1989
36 years old
Condition
Fair
inspected September 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
486 ft
4 main spans
Daily traffic
64,969
2017 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB over Lp 336 is a prestressed concrete stringer/multi-beam or girder carrying IH 45 NB over Lp 336 in Montgomery County, Texas. It was built in 1989, so it is 36 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 64,969 vehicles a day, roughly 8% of them trucks, projected to reach 97,170 by 2033. The structure is 486 ft (148.1 m) long and 82 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 45 NB
CrossesLp 336
Location1.00 MI N of Creightn RD
RouteInterstate 45
CountyMontgomery County
StateTexas
Coordinates30.27993, -95.45747
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 inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: 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
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4 (+4 approach)
Design loadHS 20
Structure length486 ft (148.1 m)
Longest span85 ft (25.9 m)
Deck width82 ft (25 m)
Roadway width79 ft (24.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,969 (2017)
Projected traffic97,170 by 2033
Trucks8%
Lanes on structure4
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 Lp 336 built?

It was built in 1989, making it 36 years old in 2025.

What condition is IH 45 NB over Lp 336 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 2022.

How much traffic does IH 45 NB over Lp 336 carry?

About 64,969 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is IH 45 NB over Lp 336?

The structure is 486 ft (148.1 m) long with a longest span of 85 ft (25.9 m) and a deck 82 ft wide.

Who owns IH 45 NB over Lp 336?

It is owned by the State Highway Agency.