US Bridges

Strong Road over Mid Mongaup River

Fair

Sullivan County, New York · 1 Mile NW of Harris · Structure no. 000000003357380

Built
1933
92 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
50
2018 count
Owner
County
County Highway Agency

About this bridge

Strong Road over Mid Mongaup River is a steel stringer/multi-beam or girder carrying Strong Road over Mid Mongaup River in Sullivan County, New York. It was built in 1933, so it is 92 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 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 50 vehicles a day, roughly 9% of them trucks, projected to reach 70 by 2038. The structure is 32 ft (9.8 m) long and 14 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesStrong Road
CrossesMid Mongaup River
Location1 Mile NW of Harris
CountySullivan County
StateNew York
Coordinates41.72626, -74.74635
Functional classUrban 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.
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span26 ft (7.9 m)
Deck width14 ft (4.2 m)
Roadway width13 ft (3.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2018)
Projected traffic70 by 2038
Trucks9%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$282,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Strong Road over Mid Mongaup River built?

It was built in 1933, making it 92 years old in 2025.

What condition is Strong Road over Mid Mongaup River 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 May 2023.

How much traffic does Strong Road over Mid Mongaup River carry?

About 50 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is Strong Road over Mid Mongaup River?

The structure is 32 ft (9.8 m) long with a longest span of 26 ft (7.9 m) and a deck 14 ft wide.

Who owns Strong Road over Mid Mongaup River?

It is owned by the County Highway Agency.