US Bridges

SR85 NB over SR397 Eglin Afb - Ng

Fair

Okaloosa County, Florida · 0.5 Mile S. of SR189 · Structure no. 570043

Built
1971
54 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
308 ft
4 main spans
Daily traffic
23,500
2022 count
Owner
State
State Highway Agency

About this bridge

SR85 NB over SR397 Eglin Afb - Ng is a prestressed concrete stringer/multi-beam or girder carrying SR85 NB over SR397 Eglin Afb - Ng in Okaloosa County, Florida. It was built in 1971, so it is 54 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 23,500 vehicles a day, roughly 6% of them trucks, projected to reach 40,772 by 2044. The structure is 308 ft (93.9 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR85 NB
CrossesSR397 Eglin Afb - Ng
Location0.5 Mile S. of SR189
RouteState Highway 85
CountyOkaloosa County
StateFlorida
Coordinates30.46234, -86.56273
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length308 ft (93.9 m)
Longest span107 ft (32.6 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,500 (2022)
Projected traffic40,772 by 2044
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR85 NB over SR397 Eglin Afb - Ng built?

It was built in 1971, making it 54 years old in 2025.

What condition is SR85 NB over SR397 Eglin Afb - Ng 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 February 2025.

How much traffic does SR85 NB over SR397 Eglin Afb - Ng carry?

About 23,500 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR85 NB over SR397 Eglin Afb - Ng?

The structure is 308 ft (93.9 m) long with a longest span of 107 ft (32.6 m) and a deck 42 ft wide.

Who owns SR85 NB over SR397 Eglin Afb - Ng?

It is owned by the State Highway Agency.