US Bridges

SH 105 over Navasota River

Good

Grimes County, Texas · 4.75 MI SW of SH 6 · Structure no. 170940031504081

Built
2021
4 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
650 ft
5 main spans
Daily traffic
7,050
2020 count
Owner
State
State Highway Agency

About this bridge

SH 105 over Navasota River is a prestressed concrete stringer/multi-beam or girder carrying SH 105 over Navasota River in Grimes County, Texas. It was built in 2021, so it is 4 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,050 vehicles a day, projected to reach 9,550 by 2040. The structure is 650 ft (198.1 m) long and 46 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesSH 105
CrossesNavasota River
Location4.75 MI SW of SH 6
RouteState Highway 105
StateTexas
Coordinates30.36453, -96.14159
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length650 ft (198.1 m)
Longest span130 ft (39.6 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,050 (2020)
Projected traffic9,550 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SH 105 over Navasota River built?

It was built in 2021, making it 4 years old in 2025.

What condition is SH 105 over Navasota River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does SH 105 over Navasota River carry?

About 7,050 vehicles per day (2020 count).

How long is SH 105 over Navasota River?

The structure is 650 ft (198.1 m) long with a longest span of 130 ft (39.6 m) and a deck 46 ft wide.

Who owns SH 105 over Navasota River?

It is owned by the State Highway Agency.