US Bridges

NB Birnham Woods over Drainage Ditch

Good

Montgomery County, Texas · 0.66 MI NW of Riley Fuzze · Structure no. 121700AA9009216

Built
2018
7 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
9,382
2021 count
Owner
County
County Highway Agency

About this bridge

NB Birnham Woods over Drainage Ditch is a prestressed concrete box beam or girders - multiple carrying NB Birnham Woods over Drainage Ditch in Montgomery County, Texas. It was built in 2018, so it is 7 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,382 vehicles a day, roughly 2% of them trucks, projected to reach 9,675 by 2042. The structure is 108 ft (32.9 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNB Birnham Woods
CrossesDrainage Ditch
Location0.66 MI NW of Riley Fuzze
RouteCity Street 0
StateTexas
Coordinates30.12374, -95.38486
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum 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 spans1
Design loadHL 93
Structure length108 ft (32.9 m)
Longest span108 ft (32.9 m)
Deck width35 ft (10.8 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,382 (2021)
Projected traffic9,675 by 2042
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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 NB Birnham Woods over Drainage Ditch built?

It was built in 2018, making it 7 years old in 2025.

What condition is NB Birnham Woods over Drainage Ditch 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 December 2023.

How much traffic does NB Birnham Woods over Drainage Ditch carry?

About 9,382 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is NB Birnham Woods over Drainage Ditch?

The structure is 108 ft (32.9 m) long with a longest span of 108 ft (32.9 m) and a deck 35 ft wide.

Who owns NB Birnham Woods over Drainage Ditch?

It is owned by the County Highway Agency.