US Bridges

IH 69 Nb/Ih 45 NB over IH 69 SB & IH 45 SB

Fair

Harris County, Texas · IH 45/IH 69 Interchange · Structure no. 121020002713235

Built
1974
51 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,762 ft
6 main spans
Daily traffic
15,070
2010 count
Owner
State
State Highway Agency

About this bridge

IH 69 Nb/Ih 45 NB over IH 69 SB & IH 45 SB is a steel continuous stringer/multi-beam or girder carrying IH 69 Nb/Ih 45 NB over IH 69 SB & IH 45 SB in Harris County, Texas. It was built in 1974, so it is 51 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 15,070 vehicles a day, roughly 9% of them trucks, projected to reach 22,860 by 2028. The structure is 1,762 ft (537.1 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesIH 69 Nb/Ih 45 NB
CrossesIH 69 SB & IH 45 SB
LocationIH 45/IH 69 Interchange
RouteU.S. Route 59
CountyHarris County
StateTexas
Coordinates29.74428, -95.36378
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+14 approach)
Design loadHS 20
Structure length1,762 ft (537.1 m)
Longest span175 ft (53.3 m)
Deck width39 ft (11.8 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,070 (2010)
Projected traffic22,860 by 2028
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an 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$154,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 69 Nb/Ih 45 NB over IH 69 SB & IH 45 SB built?

It was built in 1974, making it 51 years old in 2025.

What condition is IH 69 Nb/Ih 45 NB over IH 69 SB & IH 45 SB 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 69 Nb/Ih 45 NB over IH 69 SB & IH 45 SB carry?

About 15,070 vehicles per day (2010 count), of which roughly 9% are trucks.

How long is IH 69 Nb/Ih 45 NB over IH 69 SB & IH 45 SB?

The structure is 1,762 ft (537.1 m) long with a longest span of 175 ft (53.3 m) and a deck 39 ft wide.

Who owns IH 69 Nb/Ih 45 NB over IH 69 SB & IH 45 SB?

It is owned by the State Highway Agency.