US Bridges

Knight Road over Little Black Creek

Good

Lamar County, Mississippi · Sec 6 T 3N R15W · Structure no. SA3700000000065

Built
1994
31 years old
Condition
Good
inspected March 2024
Type
Channel Beam
Concrete
Length
76 ft
4 main spans
Daily traffic
170
2024 count
Owner
County
County Highway Agency

About this bridge

Knight Road over Little Black Creek is a concrete channel beam carrying Knight Road over Little Black Creek in Lamar County, Mississippi. It was built in 1994, so it is 31 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 170 vehicles a day, roughly 8% of them trucks, projected to reach 190 by 2046. The structure is 76 ft (23.2 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesKnight Road
CrossesLittle Black Creek
LocationSec 6 T 3N R15W
RouteCounty Highway 97
Coordinates31.25589, -89.54162
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.4 US tons
Inventory rating59.4 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width28 ft (8.4 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2024)
Projected traffic190 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Knight Road over Little Black Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Knight Road over Little Black Creek 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 March 2024.

How much traffic does Knight Road over Little Black Creek carry?

About 170 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Knight Road over Little Black Creek?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns Knight Road over Little Black Creek?

It is owned by the County Highway Agency.