US Bridges

US 20 Cape ST over I 90

Fair

Berkshire County, Massachusetts · 1 MI W. of Becket RD A19 · Structure no. L050524G8DOTNBI

Built
1957
68 years old, rebuilt 1994
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
327 ft
4 main spans
Daily traffic
5,952
2021 count
Owner
State
State Highway Agency

About this bridge

US 20 Cape ST over I 90 is a steel continuous stringer/multi-beam or girder carrying US 20 Cape ST over I 90 in Berkshire County, Massachusetts. It was built in 1957 and reconstructed in 1994, so it is 68 years old, older than the Massachusetts average of 63.8 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 5,952 vehicles a day, roughly 7% of them trucks, projected to reach 8,546 by 2031. The structure is 327 ft (99.7 m) long and 55 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 20 Cape ST
CrossesI 90
Location1 MI W. of Becket RD A19
RouteU.S. Route 20
CountyBerkshire County
StateMassachusetts
Coordinates42.29656, -73.18476
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating42.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length327 ft (99.7 m)
Longest span97 ft (29.6 m)
Deck width55 ft (16.8 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,952 (2021)
Projected traffic8,546 by 2031
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$16.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 Cape ST over I 90 built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1994.

What condition is US 20 Cape ST over I 90 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 2024.

How much traffic does US 20 Cape ST over I 90 carry?

About 5,952 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is US 20 Cape ST over I 90?

The structure is 327 ft (99.7 m) long with a longest span of 97 ft (29.6 m) and a deck 55 ft wide.

Who owns US 20 Cape ST over I 90?

It is owned by the State Highway Agency.