US Bridges

CR 366 over San Gabriel River

Fair

Williamson County, Texas · 0.60 MI S of SH 29 · Structure no. 142460AA0474002

Built
1982
43 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
240 ft
2 main spans
Daily traffic
817
2020 count
Owner
County
County Highway Agency

About this bridge

CR 366 over San Gabriel River is a prestressed concrete stringer/multi-beam or girder carrying CR 366 over San Gabriel River in Williamson County, Texas. It was built in 1982, so it is 43 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 817 vehicles a day, projected to reach 952 by 2030. The structure is 240 ft (73.2 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCR 366
CrossesSan Gabriel River
Location0.60 MI S of SH 29
RouteCounty Highway 366
CountyWilliamson County
StateTexas
Coordinates30.62936, -97.47316
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2 (+2 approach)
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span70 ft (21.3 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic817 (2020)
Projected traffic952 by 2030
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 366 over San Gabriel River built?

It was built in 1982, making it 43 years old in 2025.

What condition is CR 366 over San Gabriel River 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 CR 366 over San Gabriel River carry?

About 817 vehicles per day (2020 count).

How long is CR 366 over San Gabriel River?

The structure is 240 ft (73.2 m) long with a longest span of 70 ft (21.3 m) and a deck 30 ft wide.

Who owns CR 366 over San Gabriel River?

It is owned by the County Highway Agency.