US Bridges

ST 2 A/Great RD over Water Mulpus Brook

Fair

Middlesex County, Massachusetts · 1.1 MI W. Ayer Town Line · Structure no. S1301326PDOTNBI

Built
1941
84 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
6,891
2022 count
Owner
State
State Highway Agency

About this bridge

ST 2 A/Great RD over Water Mulpus Brook is a concrete slab carrying ST 2 A/Great RD over Water Mulpus Brook in Middlesex County, Massachusetts. It was built in 1941, so it is 84 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 6,891 vehicles a day, roughly 6% of them trucks, projected to reach 13,424 by 2032. The structure is 28 ft (8.5 m) long and 53 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesST 2 A/Great RD
CrossesWater Mulpus Brook
Location1.1 MI W. Ayer Town Line
RouteState Highway 2A
CountyMiddlesex County
StateMassachusetts
Coordinates42.57417, -71.62836
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.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating85.6 US tons
Inventory rating51.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span23 ft (7 m)
Deck width53 ft (16.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,891 (2022)
Projected traffic13,424 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemYes

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$1.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 2 A/Great RD over Water Mulpus Brook built?

It was built in 1941, making it 84 years old in 2025.

What condition is ST 2 A/Great RD over Water Mulpus 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 October 2023.

How much traffic does ST 2 A/Great RD over Water Mulpus Brook carry?

About 6,891 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is ST 2 A/Great RD over Water Mulpus Brook?

The structure is 28 ft (8.5 m) long with a longest span of 23 ft (7 m) and a deck 53 ft wide.

Who owns ST 2 A/Great RD over Water Mulpus Brook?

It is owned by the State Highway Agency.