US Bridges

Imperial Valley NB over Greens Bayou

Fair

Harris County, Texas · 0.4 MI N of Beltway 8 · Structure no. 121020B33625656

Built
1977
48 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
165 ft
3 main spans
Daily traffic
8,390
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Imperial Valley NB over Greens Bayou is a prestressed concrete box beam or girders - multiple carrying Imperial Valley NB over Greens Bayou in Harris County, Texas. It was built in 1977, so it is 48 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 8,390 vehicles a day, roughly 2% of them trucks, projected to reach 10,000 by 2035. The structure is 165 ft (50.3 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesImperial Valley NB
CrossesGreens Bayou
Location0.4 MI N of Beltway 8
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.94497, -95.39585
Functional classUrban Other Principal Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length165 ft (50.3 m)
Longest span55 ft (16.8 m)
Deck width33 ft (10 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,390 (2015)
Projected traffic10,000 by 2035
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$10,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Imperial Valley NB over Greens Bayou built?

It was built in 1977, making it 48 years old in 2025.

What condition is Imperial Valley NB over Greens Bayou 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 2023.

How much traffic does Imperial Valley NB over Greens Bayou carry?

About 8,390 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Imperial Valley NB over Greens Bayou?

The structure is 165 ft (50.3 m) long with a longest span of 55 ft (16.8 m) and a deck 33 ft wide.

Who owns Imperial Valley NB over Greens Bayou?

It is owned by the City or Municipal Highway Agency.