US Bridges

ST 9 Boylston ST over HWY Hammond Pond Pkwy

Fair

Middlesex County, Massachusetts · 5.3 KM Ely Rt 128 · Structure no. N120522ECDOTNBI

Built
1933
92 years old
Condition
Fair
inspected August 2024
Type
Frame
Concrete
Length
130 ft
2 main spans
Daily traffic
42,320
2023 count
Owner
State
State Highway Agency

About this bridge

ST 9 Boylston ST over HWY Hammond Pond Pkwy is a concrete frame carrying ST 9 Boylston ST over HWY Hammond Pond Pkwy in Middlesex County, Massachusetts. It was built in 1933, so it is 92 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 42,320 vehicles a day, roughly 2% of them trucks, projected to reach 78,175 by 2031. The structure is 130 ft (39.6 m) long and 58 ft wide.

Location

Open in Google Maps
CarriesST 9 Boylston ST
CrossesHWY Hammond Pond Pkwy
Location5.3 KM Ely Rt 128
RouteState Highway 9
CountyMiddlesex County
StateMassachusetts
Coordinates42.32123, -71.17242
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
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.
Last inspectionAugust 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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.4 US tons
Inventory rating29.5 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length130 ft (39.6 m)
Longest span65 ft (19.8 m)
Deck width58 ft (17.7 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,320 (2023)
Projected traffic78,175 by 2031
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$6.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 9 Boylston ST over HWY Hammond Pond Pkwy built?

It was built in 1933, making it 92 years old in 2025.

What condition is ST 9 Boylston ST over HWY Hammond Pond Pkwy 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 August 2024.

How much traffic does ST 9 Boylston ST over HWY Hammond Pond Pkwy carry?

About 42,320 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is ST 9 Boylston ST over HWY Hammond Pond Pkwy?

The structure is 130 ft (39.6 m) long with a longest span of 65 ft (19.8 m) and a deck 58 ft wide.

Who owns ST 9 Boylston ST over HWY Hammond Pond Pkwy?

It is owned by the State Highway Agency.