US Bridges

N Main ST over Little White Oak Bayou

Fair

Harris County, Texas · 0.5 MI SE of IH 45 · Structure no. 121020B41697001

Built
1999
26 years old
Condition
Fair
inspected August 2023
Type
Other
Prestressed Concrete
Length
163 ft
3 main spans
Daily traffic
12,820
2011 count
Owner
City
City or Municipal Highway Agency

About this bridge

N Main ST over Little White Oak Bayou is a prestressed concrete other carrying N Main ST over Little White Oak Bayou in Harris County, Texas. It was built in 1999, so it is 26 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 6 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 12,820 vehicles a day, projected to reach 15,160 by 2031. The structure is 163 ft (49.7 m) long and 58 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN Main ST
CrossesLittle White Oak Bayou
Location0.5 MI SE of IH 45
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.78503, -95.36589
Functional classUrban Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeOther
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length163 ft (49.7 m)
Longest span54 ft (16.5 m)
Deck width58 ft (17.7 m)
Roadway width47 ft (14.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,820 (2011)
Projected traffic15,160 by 2031
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$19,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N Main ST over Little White Oak Bayou built?

It was built in 1999, making it 26 years old in 2025.

What condition is N Main ST over Little White Oak Bayou 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 2023.

How much traffic does N Main ST over Little White Oak Bayou carry?

About 12,820 vehicles per day (2011 count).

How long is N Main ST over Little White Oak Bayou?

The structure is 163 ft (49.7 m) long with a longest span of 54 ft (16.5 m) and a deck 58 ft wide.

Who owns N Main ST over Little White Oak Bayou?

It is owned by the City or Municipal Highway Agency.