US Bridges

SH 77-03- Lm 9.57 over Tyronza River

Fair

Mississippi County, Arkansas · 2.4 MI S JCT SH 14 & 77 · Structure no. 000000000003988

Built
1968
57 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
350 ft
1 main span
Daily traffic
170
2018 count
Owner
State
State Highway Agency

About this bridge

SH 77-03- Lm 9.57 over Tyronza River is a steel stringer/multi-beam or girder carrying SH 77-03- Lm 9.57 over Tyronza River in Mississippi County, Arkansas. It was built in 1968, so it is 57 years old, older than the Arkansas average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 170 vehicles a day, roughly 1% of them trucks, projected to reach 390 by 2028. The structure is 350 ft (106.7 m) long and 30 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesSH 77-03- Lm 9.57
CrossesTyronza River
Location2.4 MI S JCT SH 14 & 77
RouteState Highway 77
CountyMississippi County
StateArkansas
Coordinates35.57716, -90.24925
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+9 approach)
Design loadH 15
Structure length350 ft (106.7 m)
Longest span80 ft (24.4 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2018)
Projected traffic390 by 2028
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 SH 77-03- Lm 9.57 over Tyronza River built?

It was built in 1968, making it 57 years old in 2025.

What condition is SH 77-03- Lm 9.57 over Tyronza River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does SH 77-03- Lm 9.57 over Tyronza River carry?

About 170 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is SH 77-03- Lm 9.57 over Tyronza River?

The structure is 350 ft (106.7 m) long with a longest span of 80 ft (24.4 m) and a deck 30 ft wide.

Who owns SH 77-03- Lm 9.57 over Tyronza River?

It is owned by the State Highway Agency.