US Bridges

Route 101 over Mashamoquet Brook

Fair

Windham County, Connecticut · .3 MI West of RTE 169 · Structure no. 01295

Built
1929
96 years old, rebuilt 1986
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete
Length
38 ft
1 main span
Daily traffic
8,500
2022 count
Owner
State
State Highway Agency

About this bridge

Route 101 over Mashamoquet Brook is a concrete tee beam carrying Route 101 over Mashamoquet Brook in Windham County, Connecticut. It was built in 1929 and reconstructed in 1986, so it is 96 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 8,500 vehicles a day, roughly 5% of them trucks, projected to reach 12,630 by 2042. The structure is 38 ft (11.6 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesRoute 101
CrossesMashamoquet Brook
Location.3 MI West of RTE 169
RouteState Highway 101
Coordinates41.86002, -71.96271
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length38 ft (11.6 m)
Longest span34 ft (10.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,500 (2022)
Projected traffic12,630 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 101 over Mashamoquet Brook built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1986.

What condition is Route 101 over Mashamoquet 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 November 2024.

How much traffic does Route 101 over Mashamoquet Brook carry?

About 8,500 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Route 101 over Mashamoquet Brook?

The structure is 38 ft (11.6 m) long with a longest span of 34 ft (10.4 m) and a deck 31 ft wide.

Who owns Route 101 over Mashamoquet Brook?

It is owned by the State Highway Agency.