US Bridges

Bus 20 over Rock Creek

Fair

Mitchell County, Texas · 1.3 MI W of SH 208 (n) · Structure no. 081680000512013

Built
1928
97 years old, rebuilt 1947
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete
Length
62 ft
2 main spans
Daily traffic
1,330
2013 count
Owner
State
State Highway Agency

About this bridge

Bus 20 over Rock Creek is a concrete tee beam carrying Bus 20 over Rock Creek in Mitchell County, Texas. It was built in 1928 and reconstructed in 1947, so it is 97 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 1,330 vehicles a day, roughly 15% of them trucks, projected to reach 1,860 by 2033. The structure is 62 ft (18.9 m) long and 46 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesBus 20
CrossesRock Creek
Location1.3 MI W of SH 208 (n)
RouteState Highway 20
StateTexas
Coordinates32.38997, -100.88477
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length62 ft (18.9 m)
Longest span31 ft (9.4 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,330 (2013)
Projected traffic1,860 by 2033
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Bus 20 over Rock Creek built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1947.

What condition is Bus 20 over Rock Creek 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 May 2023.

How much traffic does Bus 20 over Rock Creek carry?

About 1,330 vehicles per day (2013 count), of which roughly 15% are trucks.

How long is Bus 20 over Rock Creek?

The structure is 62 ft (18.9 m) long with a longest span of 31 ft (9.4 m) and a deck 46 ft wide.

Who owns Bus 20 over Rock Creek?

It is owned by the State Highway Agency.