US Bridges

Upper Mountain RD over RTE 429

Fair

Niagara County, New York · 2.4 MI S JCT SH429 &SH104 · Structure no. 000000001048450

Built
1970
55 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
94 ft
1 main span
Daily traffic
1,700
2020 count
Owner
State
State Highway Agency

About this bridge

Upper Mountain RD over RTE 429 is a steel stringer/multi-beam or girder carrying Upper Mountain RD over RTE 429 in Niagara County, New York. It was built in 1970, so it is 55 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 1,700 vehicles a day, roughly 5% of them trucks, projected to reach 1,717 by 2041. The structure is 94 ft (28.7 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesUpper Mountain RD
CrossesRTE 429
Location2.4 MI S JCT SH429 &SH104
RouteCounty Highway 0
CountyNiagara County
StateNew York
Coordinates43.16834, -78.88515
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating99 US tons
Inventory rating59 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length94 ft (28.7 m)
Longest span88 ft (26.8 m)
Deck width47 ft (14.4 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2020)
Projected traffic1,717 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$3.3 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Upper Mountain RD over RTE 429 built?

It was built in 1970, making it 55 years old in 2025.

What condition is Upper Mountain RD over RTE 429 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 July 2023.

How much traffic does Upper Mountain RD over RTE 429 carry?

About 1,700 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Upper Mountain RD over RTE 429?

The structure is 94 ft (28.7 m) long with a longest span of 88 ft (26.8 m) and a deck 47 ft wide.

Who owns Upper Mountain RD over RTE 429?

It is owned by the State Highway Agency.