US Bridges

SH 317 over Tonk Creek Relief

Fair

McLennan County, Texas · 6.9 MI N of US 84 · Structure no. 091610039802019

Built
1947
78 years old, rebuilt 1959
Condition
Fair
inspected December 2024
Type
Culvert
Concrete
Length
27 ft
4 main spans
Daily traffic
2,197
2023 count
Owner
State
State Highway Agency

About this bridge

SH 317 over Tonk Creek Relief is a concrete culvert carrying SH 317 over Tonk Creek Relief in McLennan County, Texas. It was built in 1947 and reconstructed in 1959, so it is 78 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 2,197 vehicles a day, roughly 12% of them trucks, projected to reach 3,779 by 2042. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSH 317
CrossesTonk Creek Relief
Location6.9 MI N of US 84
RouteState Highway 317
CountyMcLennan County
StateTexas
Coordinates31.53933, -97.4442
Functional classRural Minor 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length27 ft (8.2 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,197 (2023)
Projected traffic3,779 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$400,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 317 over Tonk Creek Relief built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1959.

What condition is SH 317 over Tonk Creek Relief 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 2024.

How much traffic does SH 317 over Tonk Creek Relief carry?

About 2,197 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is SH 317 over Tonk Creek Relief?

The structure is 27 ft (8.2 m) long with a longest span of 6 ft (1.8 m).

Who owns SH 317 over Tonk Creek Relief?

It is owned by the State Highway Agency.