US Bridges

N4356 over Ross Lake

Fair

Muskogee County, Oklahoma · .5 S .5 W of Gibson · Structure no. 023540000000000

Built
1929
96 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
210 ft
6 main spans
Daily traffic
900
2022 count
Owner
County
County Highway Agency

About this bridge

N4356 over Ross Lake is a steel stringer/multi-beam or girder carrying N4356 over Ross Lake in Muskogee County, Oklahoma. It was built in 1929, so it is 96 years old, older than the Oklahoma average of 47.8 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 900 vehicles a day, roughly 10% of them trucks, projected to reach 1,440 by 2042. The structure is 210 ft (64 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesN4356
CrossesRoss Lake
Location.5 S .5 W of Gibson
RouteCounty Highway N4356
CountyMuskogee County
StateOklahoma
Coordinates35.79064, -95.26132
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionApril 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating78.8 US tons
Inventory rating47.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length210 ft (64 m)
Longest span35 ft (10.7 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2022)
Projected traffic1,440 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$727,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4356 over Ross Lake built?

It was built in 1929, making it 96 years old in 2025.

What condition is N4356 over Ross Lake 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 April 2023.

How much traffic does N4356 over Ross Lake carry?

About 900 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N4356 over Ross Lake?

The structure is 210 ft (64 m) long with a longest span of 35 ft (10.7 m) and a deck 23 ft wide.

Who owns N4356 over Ross Lake?

It is owned by the County Highway Agency.