US Bridges

IH 45 NB over IH 610

Fair

Harris County, Texas · At IH 45 / IH 610 N Loop · Structure no. 121020050003439

Built
1961
64 years old, rebuilt 1982
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
929 ft
8 main spans
Daily traffic
103,765
2017 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB over IH 610 is a steel continuous stringer/multi-beam or girder carrying IH 45 NB over IH 610 in Harris County, Texas. It was built in 1961 and reconstructed in 1982, so it is 64 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 103,765 vehicles a day, roughly 7% of them trucks, projected to reach 211,500 by 2035. The structure is 929 ft (283.2 m) long and 62 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesIH 45 NB
CrossesIH 610
LocationAt IH 45 / IH 610 N Loop
RouteInterstate 45
CountyHarris County
StateTexas
Coordinates29.81277, -95.37494
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8 (+7 approach)
Design loadHS 20
Structure length929 ft (283.2 m)
Longest span75 ft (22.9 m)
Deck width62 ft (18.8 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic103,765 (2017)
Projected traffic211,500 by 2035
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed1.9 mi (3 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$279,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 45 NB over IH 610 built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1982.

What condition is IH 45 NB over IH 610 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 2024.

How much traffic does IH 45 NB over IH 610 carry?

About 103,765 vehicles per day (2017 count), of which roughly 7% are trucks.

How long is IH 45 NB over IH 610?

The structure is 929 ft (283.2 m) long with a longest span of 75 ft (22.9 m) and a deck 62 ft wide.

Who owns IH 45 NB over IH 610?

It is owned by the State Highway Agency.