US Bridges

ST 1 A/Lynnway over Water Saugus River

Poor

Essex County, Massachusetts · .3 MI Downstream of B&mrr · Structure no. L180154D7DOTNBI

Built
1934
91 years old, rebuilt 1990
Condition
Poor
inspected June 2024
Type
Movable - Bascule
Steel
Length
1,272 ft
1 main span
Daily traffic
85,600
2022 count
Owner
State
State Highway Agency

About this bridge

ST 1 A/Lynnway over Water Saugus River is a steel movable - bascule carrying ST 1 A/Lynnway over Water Saugus River in Essex County, Massachusetts. It was built in 1934 and reconstructed in 1990, so it is 91 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 85,600 vehicles a day, roughly 20% of them trucks, projected to reach 121,606 by 2031. The structure is 1,272 ft (387.7 m) long and 72 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesST 1 A/Lynnway
CrossesWater Saugus River
Location.3 MI Downstream of B&mrr
RouteState Highway 1
Coordinates42.44423, -70.96606
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.9 US tons
Inventory rating26.9 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckOpen grating
Main spans1 (+12 approach)
Design loadH 20
Structure length1,272 ft (387.7 m)
Longest span135 ft (41.1 m)
Deck width72 ft (21.9 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deck19 ft (5.6 m)

Traffic and service

Average daily traffic85,600 (2022)
Projected traffic121,606 by 2031
Trucks20%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$129.5 million (2025 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was ST 1 A/Lynnway over Water Saugus River built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1990.

What condition is ST 1 A/Lynnway over Water Saugus River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does ST 1 A/Lynnway over Water Saugus River carry?

About 85,600 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is ST 1 A/Lynnway over Water Saugus River?

The structure is 1,272 ft (387.7 m) long with a longest span of 135 ft (41.1 m) and a deck 72 ft wide.

Who owns ST 1 A/Lynnway over Water Saugus River?

It is owned by the State Highway Agency.