US Bridges

IH 45 NB Off Ramp over IH 45 NB on Ramp

Fair

Harris County, Texas · IH 610 @ IH 45 (interchg) · Structure no. 121020050003240

Built
1981
44 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
711 ft
5 main spans
Daily traffic
7,110
2024 count
Owner
State
State Highway Agency

About this bridge

IH 45 NB Off Ramp over IH 45 NB on Ramp is a prestressed concrete stringer/multi-beam or girder carrying IH 45 NB Off Ramp over IH 45 NB on Ramp in Harris County, Texas. It was built in 1981, so it is 44 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 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 7,110 vehicles a day, roughly 3% of them trucks, projected to reach 190 by 2030. The structure is 711 ft (216.7 m) long and 26 ft wide.

Location

Open in Google Maps
CarriesIH 45 NB Off Ramp
CrossesIH 45 NB on Ramp
LocationIH 610 @ IH 45 (interchg)
RouteCity Street 45
CountyHarris County
StateTexas
Coordinates29.69841, -95.28948
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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 geometry6: Equal to present minimum 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 spans5 (+5 approach)
Design loadHS 20
Structure length711 ft (216.7 m)
Longest span87 ft (26.5 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,110 (2024)
Projected traffic190 by 2030
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 Off Ramp over IH 45 NB on Ramp built?

It was built in 1981, making it 44 years old in 2025.

What condition is IH 45 NB Off Ramp over IH 45 NB on Ramp 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 Off Ramp over IH 45 NB on Ramp carry?

About 7,110 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is IH 45 NB Off Ramp over IH 45 NB on Ramp?

The structure is 711 ft (216.7 m) long with a longest span of 87 ft (26.5 m) and a deck 26 ft wide.

Who owns IH 45 NB Off Ramp over IH 45 NB on Ramp?

It is owned by the State Highway Agency.