US Bridges

Darby Switch Road over Trb Fredonia Resv

Fair

Chautauqua County, New York · 2.1 MI N of Cassadaga · Structure no. 000000003325390

Built
1985
40 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
164
2017 count
Owner
County
County Highway Agency

About this bridge

Darby Switch Road over Trb Fredonia Resv is a steel stringer/multi-beam or girder carrying Darby Switch Road over Trb Fredonia Resv in Chautauqua County, New York. It was built in 1985, so it is 40 years old, younger than the New York average of 53 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 164 vehicles a day, roughly 4% of them trucks, projected to reach 230 by 2037. The structure is 35 ft (10.7 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesDarby Switch Road
CrossesTrb Fredonia Resv
Location2.1 MI N of Cassadaga
CountyChautauqua County
StateNew York
Coordinates42.37905, -79.31423
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span33 ft (10 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic164 (2017)
Projected traffic230 by 2037
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Darby Switch Road over Trb Fredonia Resv built?

It was built in 1985, making it 40 years old in 2025.

What condition is Darby Switch Road over Trb Fredonia Resv 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 2024.

How much traffic does Darby Switch Road over Trb Fredonia Resv carry?

About 164 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Darby Switch Road over Trb Fredonia Resv?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10 m) and a deck 21 ft wide.

Who owns Darby Switch Road over Trb Fredonia Resv?

It is owned by the County Highway Agency.