US Bridges

SH 78 over Bois Darc Branch

Fair

Fannin County, Texas · 1.5 MI S of SH 56 · Structure no. 010750027903018

Built
1938
87 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete
Length
23 ft
4 main spans
Daily traffic
3,777
2023 count
Owner
State
State Highway Agency

About this bridge

SH 78 over Bois Darc Branch is a concrete culvert carrying SH 78 over Bois Darc Branch in Fannin County, Texas. It was built in 1938, so it is 87 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 6 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 3,777 vehicles a day, roughly 4% of them trucks, projected to reach 3,480 by 2033. The structure is 23 ft (7 m) long and 54 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSH 78
CrossesBois Darc Branch
Location1.5 MI S of SH 56
RouteState Highway 78
CountyFannin County
StateTexas
Coordinates33.55576, -96.17624
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length23 ft (7 m)
Longest span5 ft (1.5 m)
Deck width54 ft (16.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,777 (2023)
Projected traffic3,480 by 2033
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$73,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 78 over Bois Darc Branch built?

It was built in 1938, making it 87 years old in 2025.

What condition is SH 78 over Bois Darc Branch 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 December 2024.

How much traffic does SH 78 over Bois Darc Branch carry?

About 3,777 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is SH 78 over Bois Darc Branch?

The structure is 23 ft (7 m) long with a longest span of 5 ft (1.5 m) and a deck 54 ft wide.

Who owns SH 78 over Bois Darc Branch?

It is owned by the State Highway Agency.