US Bridges

Experiment Sta RD over Deer Creek

Good

Washington County, Mississippi · Sec 10 T18N R 7W B · Structure no. SA7600000000226

Built
1967
58 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
160 ft
4 main spans
Daily traffic
550
2022 count
Owner
County
County Highway Agency

About this bridge

Experiment Sta RD over Deer Creek is a prestressed concrete stringer/multi-beam or girder carrying Experiment Sta RD over Deer Creek in Washington County, Mississippi. It was built in 1967, so it is 58 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 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 550 vehicles a day, roughly 8% of them trucks, projected to reach 770 by 2042. The structure is 160 ft (48.8 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesExperiment Sta RD
CrossesDeer Creek
LocationSec 10 T18N R 7W B
RouteCounty Highway 815
Coordinates33.42118, -90.90944
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.4 US tons
Inventory rating21.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadH 15
Structure length160 ft (48.8 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2022)
Projected traffic770 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$1.3 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Experiment Sta RD over Deer Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is Experiment Sta RD over Deer 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 November 2023.

How much traffic does Experiment Sta RD over Deer Creek carry?

About 550 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Experiment Sta RD over Deer Creek?

The structure is 160 ft (48.8 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns Experiment Sta RD over Deer Creek?

It is owned by the County Highway Agency.