US Bridges

ST113 /ST3A/KENDLL over Water Merrimack River

Fair

Middlesex County, Massachusetts · Just East of Middlesex RD · Structure no. T090012ENDOTNBI

Built
1930
95 years old, rebuilt 2013
Condition
Fair
inspected July 2023
Type
Arch - Thru
Steel
Length
591 ft
1 main span
Daily traffic
15,470
2022 count
Owner
State
State Highway Agency

About this bridge

ST113 /ST3A/KENDLL over Water Merrimack River is a steel arch - thru carrying ST113 /ST3A/KENDLL over Water Merrimack River in Middlesex County, Massachusetts. It was built in 1930 and reconstructed in 2013, so it is 95 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 15,470 vehicles a day, roughly 4% of them trucks, projected to reach 35,218 by 2033. The structure is 591 ft (180 m) long and 42 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesST113 /ST3A/KENDLL
CrossesWater Merrimack River
LocationJust East of Middlesex RD
RouteState Highway 113
Coordinates42.67615, -71.4212
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.9 US tons
Inventory rating36.3 US tons

Structure

Structure typeArch - Thru
MaterialSteel
DeckClosed grating
Main spans1 (+1 approach)
Design loadHS 20
Structure length591 ft (180 m)
Longest span547 ft (166.7 m)
Deck width42 ft (12.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck14 ft (4.4 m)

Traffic and service

Average daily traffic15,470 (2022)
Projected traffic35,218 by 2033
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$22.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST113 /ST3A/KENDLL over Water Merrimack River built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 2013.

What condition is ST113 /ST3A/KENDLL over Water Merrimack 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 July 2023.

How much traffic does ST113 /ST3A/KENDLL over Water Merrimack River carry?

About 15,470 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is ST113 /ST3A/KENDLL over Water Merrimack River?

The structure is 591 ft (180 m) long with a longest span of 547 ft (166.7 m) and a deck 42 ft wide.

Who owns ST113 /ST3A/KENDLL over Water Merrimack River?

It is owned by the State Highway Agency.