US Bridges

US 59 NB On-Rp over US 59 NB Off-Rp

Good

Harris County, Texas · 0.20 MI SW of IH 45 · Structure no. 121020002713113

Built
1975
50 years old
Condition
Good
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
468 ft
5 main spans
Daily traffic
15,490
2013 count
Owner
State
State Highway Agency

About this bridge

US 59 NB On-Rp over US 59 NB Off-Rp is a prestressed concrete stringer/multi-beam or girder carrying US 59 NB On-Rp over US 59 NB Off-Rp in Harris County, Texas. It was built in 1975, so it is 50 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15,490 vehicles a day, roughly 9% of them trucks, projected to reach 21,680 by 2033. The structure is 468 ft (142.6 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 59 NB On-Rp
CrossesUS 59 NB Off-Rp
Location0.20 MI SW of IH 45
RouteU.S. Route 59
CountyHarris County
StateTexas
Coordinates29.74148, -95.36437
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5 (+2 approach)
Design loadHS 20
Structure length468 ft (142.6 m)
Longest span74 ft (22.6 m)
Deck width20 ft (6.2 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,490 (2013)
Projected traffic21,680 by 2033
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
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 US 59 NB On-Rp over US 59 NB Off-Rp built?

It was built in 1975, making it 50 years old in 2025.

What condition is US 59 NB On-Rp over US 59 NB Off-Rp in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2022.

How much traffic does US 59 NB On-Rp over US 59 NB Off-Rp carry?

About 15,490 vehicles per day (2013 count), of which roughly 9% are trucks.

How long is US 59 NB On-Rp over US 59 NB Off-Rp?

The structure is 468 ft (142.6 m) long with a longest span of 74 ft (22.6 m) and a deck 20 ft wide.

Who owns US 59 NB On-Rp over US 59 NB Off-Rp?

It is owned by the State Highway Agency.