US Bridges

IH 45 SB over Boggy Creek Relief

Fair

Leon County, Texas · 5.15 MI S of SH 7 · Structure no. 171450067504123

Built
1966
59 years old, rebuilt 1987
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
360 ft
6 main spans
Daily traffic
17,880
2019 count
Owner
State
State Highway Agency

About this bridge

IH 45 SB over Boggy Creek Relief is a prestressed concrete stringer/multi-beam or girder carrying IH 45 SB over Boggy Creek Relief in Leon County, Texas. It was built in 1966 and reconstructed in 1987, so it is 59 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 17,880 vehicles a day, roughly 38% of them trucks, projected to reach 17,700 by 2033. The structure is 360 ft (109.7 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIH 45 SB
CrossesBoggy Creek Relief
Location5.15 MI S of SH 7
RouteInterstate 45
CountyLeon County
StateTexas
Coordinates31.18496, -95.99122
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 20
Structure length360 ft (109.7 m)
Longest span60 ft (18.3 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,880 (2019)
Projected traffic17,700 by 2033
Trucks38%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 IH 45 SB over Boggy Creek Relief built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1987.

What condition is IH 45 SB over Boggy 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 March 2023.

How much traffic does IH 45 SB over Boggy Creek Relief carry?

About 17,880 vehicles per day (2019 count), of which roughly 38% are trucks.

How long is IH 45 SB over Boggy Creek Relief?

The structure is 360 ft (109.7 m) long with a longest span of 60 ft (18.3 m) and a deck 40 ft wide.

Who owns IH 45 SB over Boggy Creek Relief?

It is owned by the State Highway Agency.