US Bridges

Nfa 1261 (sa 7604) over Brimstone Creek

Fair

Scott County, Tennessee · E of US29-S of Mt Pleasan · Structure no. 76S23420005

Built
1985
40 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
133 ft
3 main spans
Daily traffic
232
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1261 (sa 7604) over Brimstone Creek is a prestressed concrete continuous box beam or girders - single or spread carrying Nfa 1261 (sa 7604) over Brimstone Creek in Scott County, Tennessee. It was built in 1985, so it is 40 years old, younger than the Tennessee average of 47.4 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 232 vehicles a day, roughly 3% of them trucks, projected to reach 320 by 2041. The structure is 133 ft (40.5 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1261 (sa 7604)
CrossesBrimstone Creek
LocationE of US29-S of Mt Pleasan
RouteCounty Highway 1261
CountyScott County
StateTennessee
Coordinates36.27387, -84.49406
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span45 ft (13.7 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic232 (2021)
Projected traffic320 by 2041
Trucks3%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1261 (sa 7604) over Brimstone Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Nfa 1261 (sa 7604) over Brimstone Creek 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 September 2024.

How much traffic does Nfa 1261 (sa 7604) over Brimstone Creek carry?

About 232 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1261 (sa 7604) over Brimstone Creek?

The structure is 133 ft (40.5 m) long with a longest span of 45 ft (13.7 m) and a deck 24 ft wide.

Who owns Nfa 1261 (sa 7604) over Brimstone Creek?

It is owned by the County Highway Agency.