US Bridges

US 20 Bstn Post RD over Water Hop Brook

Fair

Middlesex County, Massachusetts · At Corner of Station RD · Structure no. S3100426QDOTNBI

Built
1947
78 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete
Length
24 ft
1 main span
Daily traffic
14,603
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 Bstn Post RD over Water Hop Brook is a concrete tee beam carrying US 20 Bstn Post RD over Water Hop Brook in Middlesex County, Massachusetts. It was built in 1947, so it is 78 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 14,603 vehicles a day, roughly 2% of them trucks, projected to reach 50,538 by 2032. The structure is 24 ft (7.3 m) long and 38 ft wide.

Location

Open in Google Maps
CarriesUS 20 Bstn Post RD
CrossesWater Hop Brook
LocationAt Corner of Station RD
RouteU.S. Route 20
CountyMiddlesex County
StateMassachusetts
Coordinates42.36179, -71.41781
Functional classUrban Other Principal 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.
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.8 US tons
Inventory rating33.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length24 ft (7.3 m)
Longest span20 ft (6.1 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,603 (2023)
Projected traffic50,538 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$905,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 20 Bstn Post RD over Water Hop Brook built?

It was built in 1947, making it 78 years old in 2025.

What condition is US 20 Bstn Post RD over Water Hop Brook 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 January 2025.

How much traffic does US 20 Bstn Post RD over Water Hop Brook carry?

About 14,603 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is US 20 Bstn Post RD over Water Hop Brook?

The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.1 m) and a deck 38 ft wide.

Who owns US 20 Bstn Post RD over Water Hop Brook?

It is owned by the State Highway Agency.