US Bridges

Knobtown Road over Snell Creek

Good

Greene County, Mississippi · Sec 18 T 5N R 5W B · Structure no. SA2100000000084

Built
2004
21 years old
Condition
Good
inspected October 2023
Type
Channel Beam
Concrete
Length
100 ft
4 main spans
Daily traffic
120
2023 count
Owner
County
County Highway Agency

About this bridge

Knobtown Road over Snell Creek is a concrete channel beam carrying Knobtown Road over Snell Creek in Greene 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 120 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2045. The structure is 100 ft (30.4 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesKnobtown Road
CrossesSnell Creek
LocationSec 18 T 5N R 5W B
RouteCounty Highway 39
Coordinates31.3932, -88.53474
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.6 US tons
Inventory rating41.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length100 ft (30.4 m)
Longest span31 ft (9.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2023)
Projected traffic160 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Knobtown Road over Snell Creek built?

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

What condition is Knobtown Road over Snell 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 October 2023.

How much traffic does Knobtown Road over Snell Creek carry?

About 120 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Knobtown Road over Snell Creek?

The structure is 100 ft (30.4 m) long with a longest span of 31 ft (9.4 m) and a deck 31 ft wide.

Who owns Knobtown Road over Snell Creek?

It is owned by the County Highway Agency.