US Bridges

County Road 71 over Midd Mongaup Rvr

Fair

Sullivan County, New York · 0.3MI West of Sullivan Av · Structure no. 000000003355700

Built
1964
61 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
5,642
2021 count
Owner
County
County Highway Agency

About this bridge

County Road 71 over Midd Mongaup Rvr is a prestressed concrete stringer/multi-beam or girder carrying County Road 71 over Midd Mongaup Rvr in Sullivan County, New York. It was built in 1964, so it is 61 years old, older 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 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 5,642 vehicles a day, roughly 7% of them trucks, projected to reach 5,698 by 2041. The structure is 60 ft (18.3 m) long and 34 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesCounty Road 71
CrossesMidd Mongaup Rvr
Location0.3MI West of Sullivan Av
RouteCounty Highway 0
CountySullivan County
StateNew York
Coordinates41.77393, -74.73841
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating92.7 US tons
Inventory rating32.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span59 ft (17.9 m)
Deck width34 ft (10.5 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,642 (2021)
Projected traffic5,698 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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$1.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 71 over Midd Mongaup Rvr built?

It was built in 1964, making it 61 years old in 2025.

What condition is County Road 71 over Midd Mongaup Rvr 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 August 2023.

How much traffic does County Road 71 over Midd Mongaup Rvr carry?

About 5,642 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is County Road 71 over Midd Mongaup Rvr?

The structure is 60 ft (18.3 m) long with a longest span of 59 ft (17.9 m) and a deck 34 ft wide.

Who owns County Road 71 over Midd Mongaup Rvr?

It is owned by the County Highway Agency.