US Bridges

Iah Conn D over Ramp E (nb)

Good

Harris County, Texas · 1.4 MI N of Beltway 8 · Structure no. 121020TOL010102

Built
2000
25 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
252 ft
3 main spans
Daily traffic
8,000
2010 count
Owner
Toll Authority
Local Toll Authority

About this bridge

Iah Conn D over Ramp E (nb) is a prestressed concrete stringer/multi-beam or girder carrying Iah Conn D over Ramp E (nb) in Harris County, Texas. It was built in 2000, so it is 25 years old, younger 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 8,000 vehicles a day, roughly 3% of them trucks, projected to reach 10,000 by 2030. The structure is 252 ft (76.8 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIah Conn D
CrossesRamp E (nb)
Location1.4 MI N of Beltway 8
CountyHarris County
StateTexas
Coordinates29.95874, -95.37945
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length252 ft (76.8 m)
Longest span85 ft (25.9 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2010)
Projected traffic10,000 by 2030
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Iah Conn D over Ramp E (nb) built?

It was built in 2000, making it 25 years old in 2025.

What condition is Iah Conn D over Ramp E (nb) 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 November 2023.

How much traffic does Iah Conn D over Ramp E (nb) carry?

About 8,000 vehicles per day (2010 count), of which roughly 3% are trucks.

How long is Iah Conn D over Ramp E (nb)?

The structure is 252 ft (76.8 m) long with a longest span of 85 ft (25.9 m) and a deck 28 ft wide.

Who owns Iah Conn D over Ramp E (nb)?

It is owned by the Local Toll Authority.