US Bridges

ST225 Groton RD over Water Squannacook River

Fair

Middlesex County, Massachusetts · At Shirly-Groton T.L. · Structure no. G1400128FDOTNBI

Built
1996
29 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
34,059
2021 count
Owner
State
State Highway Agency

About this bridge

ST225 Groton RD over Water Squannacook River is a prestressed concrete box beam or girders - single or spread carrying ST225 Groton RD over Water Squannacook River in Middlesex County, Massachusetts. It was built in 1996, so it is 29 years old, younger 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 34,059 vehicles a day, roughly 5% of them trucks, projected to reach 6,317 by 2032. The structure is 73 ft (22.3 m) long and 36 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesST225 Groton RD
CrossesWater Squannacook River
LocationAt Shirly-Groton T.L.
RouteState Highway 225
CountyMiddlesex County
StateMassachusetts
Coordinates42.6029, -71.62759
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating60.7 US tons
Inventory rating36.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span69 ft (20.9 m)
Deck width36 ft (11.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,059 (2021)
Projected traffic6,317 by 2032
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST225 Groton RD over Water Squannacook River built?

It was built in 1996, making it 29 years old in 2025.

What condition is ST225 Groton RD over Water Squannacook River 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 ST225 Groton RD over Water Squannacook River carry?

About 34,059 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is ST225 Groton RD over Water Squannacook River?

The structure is 73 ft (22.3 m) long with a longest span of 69 ft (20.9 m) and a deck 36 ft wide.

Who owns ST225 Groton RD over Water Squannacook River?

It is owned by the State Highway Agency.