US Bridges

IH 610 NB on Ramp over Brays Bayou & IH 610 SB

Fair

Harris County, Texas · 1.9 MI W of US 90A · Structure no. 121020027116375

Built
1971
54 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,498 ft
21 main spans
Daily traffic
9,047
2024 count
Owner
State
State Highway Agency

About this bridge

IH 610 NB on Ramp over Brays Bayou & IH 610 SB is a prestressed concrete stringer/multi-beam or girder carrying IH 610 NB on Ramp over Brays Bayou & IH 610 SB in Harris County, Texas. It was built in 1971, so it is 54 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 9,047 vehicles a day, roughly 4% of them trucks, projected to reach 23,840 by 2034. The structure is 1,498 ft (456.6 m) long and 41 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesIH 610 NB on Ramp
CrossesBrays Bayou & IH 610 SB
Location1.9 MI W of US 90A
CountyHarris County
StateTexas
Coordinates29.68059, -95.45896
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans21
Design loadHS 20
Structure length1,498 ft (456.6 m)
Longest span80 ft (24.4 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,047 (2024)
Projected traffic23,840 by 2034
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkNon-Interstate STRAHNET route

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 IH 610 NB on Ramp over Brays Bayou & IH 610 SB built?

It was built in 1971, making it 54 years old in 2025.

What condition is IH 610 NB on Ramp over Brays Bayou & IH 610 SB 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 2024.

How much traffic does IH 610 NB on Ramp over Brays Bayou & IH 610 SB carry?

About 9,047 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is IH 610 NB on Ramp over Brays Bayou & IH 610 SB?

The structure is 1,498 ft (456.6 m) long with a longest span of 80 ft (24.4 m) and a deck 41 ft wide.

Who owns IH 610 NB on Ramp over Brays Bayou & IH 610 SB?

It is owned by the State Highway Agency.