US Bridges

N4705 over Cave Springs Trib.

FairPosted for load

Delaware County, Oklahoma · 10.0 MI SE of Grove · Structure no. 030140000000000

Built
1914
111 years old, rebuilt 1960
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
2 main spans
Daily traffic
100
2008 count
Owner
County
County Highway Agency

About this bridge

N4705 over Cave Springs Trib. is a steel stringer/multi-beam or girder carrying N4705 over Cave Springs Trib. in Delaware County, Oklahoma. It was built in 1914 and reconstructed in 1960, so it is 111 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2028. The structure is 60 ft (18.2 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesN4705
CrossesCave Springs Trib.
Location10.0 MI SE of Grove
RouteCounty Highway N4705
CountyDelaware County
StateOklahoma
Coordinates36.54752, -94.61796
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length60 ft (18.2 m)
Longest span27 ft (8.2 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2008)
Projected traffic160 by 2028
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$387,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4705 over Cave Springs Trib. built?

It was built in 1914, making it 111 years old in 2025. It was reconstructed in 1960.

What condition is N4705 over Cave Springs Trib. 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 2024.

How much traffic does N4705 over Cave Springs Trib. carry?

About 100 vehicles per day (2008 count), of which roughly 10% are trucks.

How long is N4705 over Cave Springs Trib.?

The structure is 60 ft (18.2 m) long with a longest span of 27 ft (8.2 m) and a deck 24 ft wide.

Who owns N4705 over Cave Springs Trib.?

It is owned by the County Highway Agency.