US Bridges

N Main ST over IH 45

Fair

Harris County, Texas · 1.00 MI N of IH 10 · Structure no. 121020050003119

Built
1962
63 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
197 ft
2 main spans
Daily traffic
11,840
2010 count
Owner
State
State Highway Agency

About this bridge

N Main ST over IH 45 is a steel continuous stringer/multi-beam or girder carrying N Main ST over IH 45 in Harris County, Texas. It was built in 1962, so it is 63 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 11,840 vehicles a day, projected to reach 11,840 by 2030. The structure is 197 ft (59.9 m) long and 75 ft wide.

Location

Open in Google Maps
CarriesN Main ST
CrossesIH 45
Location1.00 MI N of IH 10
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.78993, -95.37182
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 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 rating43 US tons
Inventory rating26 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length197 ft (59.9 m)
Longest span99 ft (30.2 m)
Deck width75 ft (23 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,840 (2010)
Projected traffic11,840 by 2030
Trucks0%
Lanes on structure5
Traffic directionTwo-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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N Main ST over IH 45 built?

It was built in 1962, making it 63 years old in 2025.

What condition is N Main ST over IH 45 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 August 2024.

How much traffic does N Main ST over IH 45 carry?

About 11,840 vehicles per day (2010 count).

How long is N Main ST over IH 45?

The structure is 197 ft (59.9 m) long with a longest span of 99 ft (30.2 m) and a deck 75 ft wide.

Who owns N Main ST over IH 45?

It is owned by the State Highway Agency.