US Bridges

CR 313 over Ayish Bayou

Good

San Augustine County, Texas · 0.95 MI SE of FM 705 · Structure no. 112030AA0421003

Built
2021
4 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
95 ft
1 main span
Daily traffic
55
2015 count
Owner
County
County Highway Agency

About this bridge

CR 313 over Ayish Bayou is a prestressed concrete box beam or girders - multiple carrying CR 313 over Ayish Bayou in San Augustine County, Texas. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 55 vehicles a day, projected to reach 60 by 2035. The structure is 95 ft (29 m) long and 23 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCR 313
CrossesAyish Bayou
Location0.95 MI SE of FM 705
RouteCounty Highway 313
CountySan Augustine County
StateTexas
Coordinates31.35066, -94.14095
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length95 ft (29 m)
Longest span94 ft (28.7 m)
Deck width23 ft (7 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2015)
Projected traffic60 by 2035
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 313 over Ayish Bayou built?

It was built in 2021, making it 4 years old in 2025.

What condition is CR 313 over Ayish Bayou 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 May 2023.

How much traffic does CR 313 over Ayish Bayou carry?

About 55 vehicles per day (2015 count).

How long is CR 313 over Ayish Bayou?

The structure is 95 ft (29 m) long with a longest span of 94 ft (28.7 m) and a deck 23 ft wide.

Who owns CR 313 over Ayish Bayou?

It is owned by the County Highway Agency.