US Bridges

Bay ST over Lagoon

Good

Galveston County, Texas · 0.06 Mi. W of Skyline Dr. · Structure no. 120850AA0017001

Built
2010
15 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
115 ft
1 main span
Daily traffic
560
2011 count
Owner
County
County Highway Agency

About this bridge

Bay ST over Lagoon is a prestressed concrete box beam or girders - multiple carrying Bay ST over Lagoon in Galveston County, Texas. It was built in 2010, so it is 15 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 560 vehicles a day, projected to reach 620 by 2031. The structure is 115 ft (35.1 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBay ST
CrossesLagoon
Location0.06 Mi. W of Skyline Dr.
RouteCounty Highway 0
CountyGalveston County
StateTexas
Coordinates29.42205, -94.89181
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHL 93
Structure length115 ft (35.1 m)
Longest span47 ft (14.3 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic560 (2011)
Projected traffic620 by 2031
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$5,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Bay ST over Lagoon built?

It was built in 2010, making it 15 years old in 2025.

What condition is Bay ST over Lagoon 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 October 2023.

How much traffic does Bay ST over Lagoon carry?

About 560 vehicles per day (2011 count).

How long is Bay ST over Lagoon?

The structure is 115 ft (35.1 m) long with a longest span of 47 ft (14.3 m) and a deck 39 ft wide.

Who owns Bay ST over Lagoon?

It is owned by the County Highway Agency.