US Bridges

RTE 21 over Grimes Creek

Fair

Ontario County, New York · 0.3 MI NE JCT Rts 21 & 53 · Structure no. 000000001016440

Built
1992
33 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
5,581
2018 count
Owner
State
State Highway Agency

About this bridge

RTE 21 over Grimes Creek is a prestressed concrete box beam or girders - multiple carrying RTE 21 over Grimes Creek in Ontario County, New York. It was built in 1992, so it is 33 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 5 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 5,581 vehicles a day, roughly 8% of them trucks, projected to reach 5,615 by 2041. The structure is 41 ft (12.5 m) long and 52 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesRTE 21
CrossesGrimes Creek
Location0.3 MI NE JCT Rts 21 & 53
RouteState Highway 21
CountyOntario County
StateNew York
Coordinates42.61089, -77.40622
Functional classRural Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating47 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span37 ft (11.3 m)
Deck width52 ft (16 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,581 (2018)
Projected traffic5,615 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed24.9 mi (40 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$1.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 21 over Grimes Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is RTE 21 over Grimes Creek 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 June 2023.

How much traffic does RTE 21 over Grimes Creek carry?

About 5,581 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is RTE 21 over Grimes Creek?

The structure is 41 ft (12.5 m) long with a longest span of 37 ft (11.3 m) and a deck 52 ft wide.

Who owns RTE 21 over Grimes Creek?

It is owned by the State Highway Agency.