US Bridges

SR 21 over Stream

Good

Kemper County, Mississippi · 1.9 MI N SR 397 · Structure no. 310002103506410

Built
1959
66 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
650
2023 count
Owner
State
State Highway Agency

About this bridge

SR 21 over Stream is a concrete culvert carrying SR 21 over Stream in Kemper County, Mississippi. It was built in 1959, so it is 66 years old, older 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 650 vehicles a day, roughly 14% of them trucks, projected to reach 650 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 28 mi (45 km).

CarriesSR 21
CrossesStream
Location1.9 MI N SR 397
RouteState Highway 21
Coordinates32.89375, -88.80021
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.3 US tons
Inventory rating51 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2023)
Projected traffic650 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SR 21 over Stream built?

It was built in 1959, making it 66 years old in 2025.

What condition is SR 21 over Stream 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 August 2023.

How much traffic does SR 21 over Stream carry?

About 650 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is SR 21 over Stream?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m).

Who owns SR 21 over Stream?

It is owned by the State Highway Agency.