US Bridges

Zimmerman Road over Eighteen Mile Crk

Fair

Erie County, New York · .1 Mile SW of Boston · Structure no. 000000003327600

Built
1987
38 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
78 ft
1 main span
Daily traffic
4,044
2021 count
Owner
County
County Highway Agency

About this bridge

Zimmerman Road over Eighteen Mile Crk is a steel stringer/multi-beam or girder carrying Zimmerman Road over Eighteen Mile Crk in Erie County, New York. It was built in 1987, so it is 38 years old, younger 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 4,044 vehicles a day, roughly 7% of them trucks, projected to reach 5,662 by 2041. The structure is 78 ft (23.8 m) long and 41 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesZimmerman Road
CrossesEighteen Mile Crk
Location.1 Mile SW of Boston
RouteCounty Highway 0
CountyErie County
StateNew York
Coordinates42.68471, -78.77792
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 protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating74 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length78 ft (23.8 m)
Longest span73 ft (22.2 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,044 (2021)
Projected traffic5,662 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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$4.5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Zimmerman Road over Eighteen Mile Crk built?

It was built in 1987, making it 38 years old in 2025.

What condition is Zimmerman Road over Eighteen Mile Crk 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 2024.

How much traffic does Zimmerman Road over Eighteen Mile Crk carry?

About 4,044 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Zimmerman Road over Eighteen Mile Crk?

The structure is 78 ft (23.8 m) long with a longest span of 73 ft (22.2 m) and a deck 41 ft wide.

Who owns Zimmerman Road over Eighteen Mile Crk?

It is owned by the County Highway Agency.