US Bridges

RTE I90 over Knapp Creek

Poor

Herkimer County, New York · 3.6 MI E of Exit 31 Ramp · Structure no. 000000005516110

Built
1954
71 years old
Condition
Poor
inspected March 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
20,495
2020 count
Owner
Toll Authority
State Toll Authority

About this bridge

RTE I90 over Knapp Creek is a concrete culvert carrying RTE I90 over Knapp Creek in Herkimer County, New York. It was built in 1954, so it is 71 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 20,495 vehicles a day, roughly 30% of them trucks, projected to reach 23,614 by 2041. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 16.8 mi (27 km).

Location

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CarriesRTE I90
CrossesKnapp Creek
Location3.6 MI E of Exit 31 Ramp
RouteInterstate 90
CountyHerkimer County
StateNew York
Coordinates43.09268, -75.14115
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: 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 alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length26 ft (7.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,495 (2020)
Projected traffic23,614 by 2041
Trucks30%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn an Interstate toll segment under Secretarial agreement
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE I90 over Knapp Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is RTE I90 over Knapp Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.

How much traffic does RTE I90 over Knapp Creek carry?

About 20,495 vehicles per day (2020 count), of which roughly 30% are trucks.

How long is RTE I90 over Knapp Creek?

The structure is 26 ft (7.8 m) long with a longest span of 12 ft (3.7 m).

Who owns RTE I90 over Knapp Creek?

It is owned by the State Toll Authority.