US Bridges

CR 420 over Turkey Creek Branch

Fair

Williamson County, Texas · 0.90 MI W of FM 1063 · Structure no. 142460AA0340001

Built
1991
34 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
35 ft
4 main spans
Daily traffic
110
2010 count
Owner
County
County Highway Agency

About this bridge

CR 420 over Turkey Creek Branch is a concrete culvert carrying CR 420 over Turkey Creek Branch in Williamson County, Texas. It was built in 1991, so it is 34 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 110 vehicles a day, projected to reach 200 by 2027. The structure is 35 ft (10.7 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCR 420
CrossesTurkey Creek Branch
Location0.90 MI W of FM 1063
RouteCounty Highway 420
CountyWilliamson County
StateTexas
Coordinates30.61524, -97.30747
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span8 ft (2.4 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2010)
Projected traffic200 by 2027
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 420 over Turkey Creek Branch built?

It was built in 1991, making it 34 years old in 2025.

What condition is CR 420 over Turkey Creek Branch 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 November 2023.

How much traffic does CR 420 over Turkey Creek Branch carry?

About 110 vehicles per day (2010 count).

How long is CR 420 over Turkey Creek Branch?

The structure is 35 ft (10.7 m) long with a longest span of 8 ft (2.4 m) and a deck 28 ft wide.

Who owns CR 420 over Turkey Creek Branch?

It is owned by the County Highway Agency.