US Bridges

SH 146 NB over UP RR & Port Road

Fair

Harris County, Texas · 2.80 MI N of Nasa RD 1 · Structure no. 121020038905059

Built
1969
56 years old
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
385 ft
3 main spans
Daily traffic
20,500
2019 count
Owner
State
State Highway Agency

About this bridge

SH 146 NB over UP RR & Port Road is a prestressed concrete stringer/multi-beam or girder carrying SH 146 NB over UP RR & Port Road 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 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 20,500 vehicles a day, roughly 8% of them trucks, projected to reach 20,850 by 2033. The structure is 385 ft (117.3 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
CrossesUP RR & Port Road
Location2.80 MI N of Nasa RD 1
RouteState Highway 146
CountyHarris County
StateTexas
Coordinates29.60383, -95.03195
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.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+3 approach)
Design loadHS 20
Structure length385 ft (117.3 m)
Longest span80 ft (24.4 m)
Deck width61 ft (18.5 m)
Roadway width59 ft (18 m)
Vertical clearance over deck19 ft (5.6 m)

Traffic and service

Average daily traffic20,500 (2019)
Projected traffic20,850 by 2033
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 146 NB over UP RR & Port Road built?

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

What condition is SH 146 NB over UP RR & Port Road 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 2022.

How much traffic does SH 146 NB over UP RR & Port Road carry?

About 20,500 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is SH 146 NB over UP RR & Port Road?

The structure is 385 ft (117.3 m) long with a longest span of 80 ft (24.4 m) and a deck 61 ft wide.

Who owns SH 146 NB over UP RR & Port Road?

It is owned by the State Highway Agency.