US Bridges

SH 146 NB over Taylor Bayou

Poor

Harris County, Texas · 3.25 MI N of Nasa RD 1 · Structure no. 121020038905058

Built
1969
56 years old
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
240 ft
6 main spans
Daily traffic
18,841
2023 count
Owner
State
State Highway Agency

About this bridge

SH 146 NB over Taylor Bayou is a concrete stringer/multi-beam or girder carrying SH 146 NB over Taylor Bayou in Harris County, Texas. It was built in 1969, so it is 56 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 18,841 vehicles a day, roughly 8% of them trucks, projected to reach 26,378 by 2042. The structure is 240 ft (73.2 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSH 146 NB
CrossesTaylor Bayou
Location3.25 MI N of Nasa RD 1
RouteState Highway 146
CountyHarris County
StateTexas
Coordinates29.6103, -95.03301
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span40 ft (12.2 m)
Deck width61 ft (18.6 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,841 (2023)
Projected traffic26,378 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 146 NB over Taylor Bayou built?

It was built in 1969, making it 56 years old in 2025.

What condition is SH 146 NB over Taylor Bayou in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does SH 146 NB over Taylor Bayou carry?

About 18,841 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SH 146 NB over Taylor Bayou?

The structure is 240 ft (73.2 m) long with a longest span of 40 ft (12.2 m) and a deck 61 ft wide.

Who owns SH 146 NB over Taylor Bayou?

It is owned by the State Highway Agency.