US Bridges

County Road 121 over Burlington & Northern RR

Good

Union County, Mississippi · Sec 26 T 7S R 3E B · Structure no. SA7300000000094

Built
2004
21 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
180 ft
1 main span
Daily traffic
100
2016 count
Owner
County
County Highway Agency

About this bridge

County Road 121 over Burlington & Northern RR is a prestressed concrete stringer/multi-beam or girder carrying County Road 121 over Burlington & Northern RR in Union County, Mississippi. It was built in 2004, so it is 21 years old, younger than the Mississippi average of 38.9 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 150 by 2036. The structure is 180 ft (54.9 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road 121
CrossesBurlington & Northern RR
LocationSec 26 T 7S R 3E B
RouteCounty Highway 66
CountyUnion County
StateMississippi
Coordinates34.44178, -88.94797
Functional classRural Local

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.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.3 US tons
Inventory rating30.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span100 ft (30.5 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2016)
Projected traffic150 by 2036
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$850,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 121 over Burlington & Northern RR built?

It was built in 2004, making it 21 years old in 2025.

What condition is County Road 121 over Burlington & Northern RR 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 June 2024.

How much traffic does County Road 121 over Burlington & Northern RR carry?

About 100 vehicles per day (2016 count), of which roughly 3% are trucks.

How long is County Road 121 over Burlington & Northern RR?

The structure is 180 ft (54.9 m) long with a longest span of 100 ft (30.5 m) and a deck 31 ft wide.

Who owns County Road 121 over Burlington & Northern RR?

It is owned by the County Highway Agency.