US Bridges

SH 30 over Navasota River

Fair

Grimes County, Texas · 6.35 MI W of FM 244 · Structure no. 170940021204014

Built
1958
67 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
297 ft
3 main spans
Daily traffic
12,105
2023 count
Owner
State
State Highway Agency

About this bridge

SH 30 over Navasota River is a steel continuous stringer/multi-beam or girder carrying SH 30 over Navasota River in Grimes County, Texas. It was built in 1958, so it is 67 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 5 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 12,105 vehicles a day, roughly 9% of them trucks, projected to reach 11,470 by 2033. The structure is 297 ft (90.5 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesSH 30
CrossesNavasota River
Location6.35 MI W of FM 244
RouteState Highway 30
CountyGrimes County
StateTexas
Coordinates30.60761, -96.1818
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadOther
Structure length297 ft (90.5 m)
Longest span75 ft (22.9 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,105 (2023)
Projected traffic11,470 by 2033
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$21,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 30 over Navasota River built?

It was built in 1958, making it 67 years old in 2025.

What condition is SH 30 over Navasota River 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 SH 30 over Navasota River carry?

About 12,105 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SH 30 over Navasota River?

The structure is 297 ft (90.5 m) long with a longest span of 75 ft (22.9 m) and a deck 31 ft wide.

Who owns SH 30 over Navasota River?

It is owned by the State Highway Agency.