US Bridges

FM 830 over Slough

Good

Montgomery County, Texas · 4.80 MI W of IH 45 · Structure no. 121700289701002

Built
1971
54 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
23 ft
4 main spans
Daily traffic
5,810
2020 count
Owner
State
State Highway Agency

About this bridge

FM 830 over Slough is a concrete culvert carrying FM 830 over Slough in Montgomery County, Texas. It was built in 1971, so it is 54 years old, older 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 5,810 vehicles a day, roughly 7% of them trucks, projected to reach 7,330 by 2033. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFM 830
CrossesSlough
Location4.80 MI W of IH 45
RouteState Highway 830
CountyMontgomery County
StateTexas
Coordinates30.41114, -95.56218
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length23 ft (7 m)
Longest span5 ft (1.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,810 (2020)
Projected traffic7,330 by 2033
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 830 over Slough built?

It was built in 1971, making it 54 years old in 2025.

What condition is FM 830 over Slough 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 November 2024.

How much traffic does FM 830 over Slough carry?

About 5,810 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is FM 830 over Slough?

The structure is 23 ft (7 m) long with a longest span of 5 ft (1.5 m).

Who owns FM 830 over Slough?

It is owned by the State Highway Agency.