US Bridges

Research Forest EB over Panther Branch

Good

Montgomery County, Texas · 0.45 MI W of Shenandoah · Structure no. 121700AA2063004

Built
1999
26 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
416 ft
1 main span
Daily traffic
10,000
2013 count
Owner
County
County Highway Agency

About this bridge

Research Forest EB over Panther Branch is a prestressed concrete box beam or girders - multiple carrying Research Forest EB over Panther Branch in Montgomery County, Texas. It was built in 1999, so it is 26 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 10,000 vehicles a day, roughly 1% of them trucks, projected to reach 10,000 by 2033. The structure is 416 ft (126.8 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesResearch Forest EB
CrossesPanther Branch
Location0.45 MI W of Shenandoah
RouteCounty Highway 0
CountyMontgomery County
StateTexas
Coordinates30.17677, -95.4715
Functional classUrban Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+9 approach)
Design loadHS 20
Structure length416 ft (126.8 m)
Longest span80 ft (24.4 m)
Deck width48 ft (14.6 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2013)
Projected traffic10,000 by 2033
Trucks1%
Lanes on structure3
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$379,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Research Forest EB over Panther Branch built?

It was built in 1999, making it 26 years old in 2025.

What condition is Research Forest EB over Panther Branch 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 October 2023.

How much traffic does Research Forest EB over Panther Branch carry?

About 10,000 vehicles per day (2013 count), of which roughly 1% are trucks.

How long is Research Forest EB over Panther Branch?

The structure is 416 ft (126.8 m) long with a longest span of 80 ft (24.4 m) and a deck 48 ft wide.

Who owns Research Forest EB over Panther Branch?

It is owned by the County Highway Agency.