US Bridges

RTE 21 over Reservoir Spillway

Fair

Steuben County, New York · 2 MI NE JCT SR 17 & SR 21 · Structure no. 000000001016390

Built
1983
42 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
2,209
2019 count
Owner
State
State Highway Agency

About this bridge

RTE 21 over Reservoir Spillway is a prestressed concrete box beam or girders - multiple carrying RTE 21 over Reservoir Spillway in Steuben County, New York. It was built in 1983, so it is 42 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 2,209 vehicles a day, roughly 9% of them trucks, projected to reach 2,345 by 2041. The structure is 64 ft (19.5 m) long and 37 ft wide. If it were closed, the detour would be 35.4 mi (57 km).

Location

Open in Google Maps
CarriesRTE 21
CrossesReservoir Spillway
Location2 MI NE JCT SR 17 & SR 21
RouteState Highway 21
CountySteuben County
StateNew York
Coordinates42.39905, -77.62101
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97 US tons
Inventory rating52 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span63 ft (19.2 m)
Deck width37 ft (11.3 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,209 (2019)
Projected traffic2,345 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed35.4 mi (57 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$936,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 21 over Reservoir Spillway built?

It was built in 1983, making it 42 years old in 2025.

What condition is RTE 21 over Reservoir Spillway 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 April 2023.

How much traffic does RTE 21 over Reservoir Spillway carry?

About 2,209 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is RTE 21 over Reservoir Spillway?

The structure is 64 ft (19.5 m) long with a longest span of 63 ft (19.2 m) and a deck 37 ft wide.

Who owns RTE 21 over Reservoir Spillway?

It is owned by the State Highway Agency.