US Bridges

CR 406 over Boggy Creek

Fair

Williamson County, Texas · 1.40 MI N of FM 1660 · Structure no. 142460AA0425003

Built
1994
31 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
160 ft
1 main span
Daily traffic
162
2020 count
Owner
County
County Highway Agency

About this bridge

CR 406 over Boggy Creek is a prestressed concrete stringer/multi-beam or girder carrying CR 406 over Boggy Creek in Williamson County, Texas. It was built in 1994, so it is 31 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 162 vehicles a day, projected to reach 250 by 2030. The structure is 160 ft (48.8 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesCR 406
CrossesBoggy Creek
Location1.40 MI N of FM 1660
RouteCounty Highway 406
CountyWilliamson County
StateTexas
Coordinates30.49566, -97.42141
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span70 ft (21.3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic162 (2020)
Projected traffic250 by 2030
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 406 over Boggy Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is CR 406 over Boggy 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 November 2023.

How much traffic does CR 406 over Boggy Creek carry?

About 162 vehicles per day (2020 count).

How long is CR 406 over Boggy Creek?

The structure is 160 ft (48.8 m) long with a longest span of 70 ft (21.3 m) and a deck 30 ft wide.

Who owns CR 406 over Boggy Creek?

It is owned by the County Highway Agency.