US Bridges

IH 610 NB over Mississippi ST

Fair

Harris County, Texas · 2.20 MI S of IH 10 · Structure no. 121020027115497

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
188 ft
4 main spans
Daily traffic
54,752
2021 count
Owner
State
State Highway Agency

About this bridge

IH 610 NB over Mississippi ST is a prestressed concrete stringer/multi-beam or girder carrying IH 610 NB over Mississippi ST in Harris County, Texas. It was built in 1970, so it is 55 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 54,752 vehicles a day, roughly 13% of them trucks, projected to reach 76,652 by 2041. The structure is 188 ft (57.3 m) long and 81 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIH 610 NB
CrossesMississippi ST
Location2.20 MI S of IH 10
RouteInterstate 610
StateTexas
Coordinates29.74344, -95.26467
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating42 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length188 ft (57.3 m)
Longest span47 ft (14.3 m)
Deck width81 ft (24.6 m)
Roadway width79 ft (24.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,752 (2021)
Projected traffic76,652 by 2041
Trucks13%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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 over Mississippi ST built?

It was built in 1970, making it 55 years old in 2025.

What condition is IH 610 NB over Mississippi ST 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 October 2024.

How much traffic does IH 610 NB over Mississippi ST carry?

About 54,752 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is IH 610 NB over Mississippi ST?

The structure is 188 ft (57.3 m) long with a longest span of 47 ft (14.3 m) and a deck 81 ft wide.

Who owns IH 610 NB over Mississippi ST?

It is owned by the State Highway Agency.