US Bridges

RTE 104 over Eighteenmile Creek

Poor

Niagara County, New York · 2 MI W JCT SH 104 & SH 78 · Structure no. 000000001036380

Built
1929
96 years old, rebuilt 1975
Condition
Poor
inspected November 2024
Type
Girder and Floorbeam System
Steel
Length
76 ft
1 main span
Daily traffic
6,759
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 104 over Eighteenmile Creek is a steel girder and floorbeam system carrying RTE 104 over Eighteenmile Creek in Niagara County, New York. It was built in 1929 and reconstructed in 1975, so it is 96 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 6,759 vehicles a day, roughly 10% of them trucks, projected to reach 7,137 by 2041. The structure is 76 ft (23.2 m) long and 33 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesRTE 104
CrossesEighteenmile Creek
Location2 MI W JCT SH 104 & SH 78
RouteState Highway 104
CountyNiagara County
StateNew York
Coordinates43.21932, -78.71631
Functional classUrban Minor Arterial

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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating20 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length76 ft (23.2 m)
Longest span70 ft (21.3 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,759 (2020)
Projected traffic7,137 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$2.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 104 over Eighteenmile Creek built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1975.

What condition is RTE 104 over Eighteenmile 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 November 2024.

How much traffic does RTE 104 over Eighteenmile Creek carry?

About 6,759 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is RTE 104 over Eighteenmile Creek?

The structure is 76 ft (23.2 m) long with a longest span of 70 ft (21.3 m) and a deck 33 ft wide.

Who owns RTE 104 over Eighteenmile Creek?

It is owned by the State Highway Agency.