US Bridges

IH 45 NB over Conn IH45 SB to IH610 EB

Fair

Harris County, Texas · IH 610 @ IH 45 (interchg) · Structure no. 121020050003223

Built
1952
73 years old, rebuilt 1981
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
165 ft
3 main spans
Daily traffic
208,346
2020 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB over Conn IH45 SB to IH610 EB is a steel continuous stringer/multi-beam or girder carrying IH 45 NB over Conn IH45 SB to IH610 EB in Harris County, Texas. It was built in 1952 and reconstructed in 1981, so it is 73 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 208,346 vehicles a day, roughly 7% of them trucks, projected to reach 169,220 by 2033. The structure is 165 ft (50.3 m) long and 55 ft wide.

Location

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CarriesIH 45 NB
CrossesConn IH45 SB to IH610 EB
LocationIH 610 @ IH 45 (interchg)
RouteInterstate 45
CountyHarris County
StateTexas
Coordinates29.69654, -95.28764
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length165 ft (50.3 m)
Longest span65 ft (19.8 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic208,346 (2020)
Projected traffic169,220 by 2033
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$21,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 45 NB over Conn IH45 SB to IH610 EB built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1981.

What condition is IH 45 NB over Conn IH45 SB to IH610 EB 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 December 2024.

How much traffic does IH 45 NB over Conn IH45 SB to IH610 EB carry?

About 208,346 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is IH 45 NB over Conn IH45 SB to IH610 EB?

The structure is 165 ft (50.3 m) long with a longest span of 65 ft (19.8 m) and a deck 55 ft wide.

Who owns IH 45 NB over Conn IH45 SB to IH610 EB?

It is owned by the State Highway Agency.