US Bridges

Harbor Drive NB over Highland Bayou Diversion

Fair

Galveston County, Texas · 2.35 MI S of SH 6 · Structure no. 120850G00327222

Built
2000
25 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
309 ft
3 main spans
Daily traffic
1,191
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Harbor Drive NB over Highland Bayou Diversion is a prestressed concrete stringer/multi-beam or girder carrying Harbor Drive NB over Highland Bayou Diversion in Galveston 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 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 1,191 vehicles a day, roughly 3% of them trucks, projected to reach 1,667 by 2038. The structure is 309 ft (94.2 m) long and 19 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHarbor Drive NB
CrossesHighland Bayou Diversion
Location2.35 MI S of SH 6
RouteCity Street 0
CountyGalveston County
StateTexas
Coordinates29.30339, -94.98771
Functional classUrban Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length309 ft (94.2 m)
Longest span103 ft (31.4 m)
Deck width19 ft (5.8 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,191 (2018)
Projected traffic1,667 by 2038
Trucks3%
Lanes on structure1
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Harbor Drive NB over Highland Bayou Diversion built?

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

What condition is Harbor Drive NB over Highland Bayou Diversion 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 2023.

How much traffic does Harbor Drive NB over Highland Bayou Diversion carry?

About 1,191 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is Harbor Drive NB over Highland Bayou Diversion?

The structure is 309 ft (94.2 m) long with a longest span of 103 ft (31.4 m) and a deck 19 ft wide.

Who owns Harbor Drive NB over Highland Bayou Diversion?

It is owned by the City or Municipal Highway Agency.