US Bridges

Route 169 over Mashamoquet Brook

Fair

Windham County, Connecticut · 0.2 Mile North of RTE 101 · Structure no. 05422

Built
1936
89 years old, rebuilt 1985
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
4,200
2019 count
Owner
State
State Highway Agency

About this bridge

Route 169 over Mashamoquet Brook is a prestressed concrete box beam or girders - multiple carrying Route 169 over Mashamoquet Brook in Windham County, Connecticut. It was built in 1936 and reconstructed in 1985, so it is 89 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 4,200 vehicles a day, roughly 6% of them trucks, projected to reach 6,241 by 2039. The structure is 39 ft (11.9 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRoute 169
CrossesMashamoquet Brook
Location0.2 Mile North of RTE 101
RouteState Highway 169
Coordinates41.86096, -71.95922
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span36 ft (11 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2019)
Projected traffic6,241 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 169 over Mashamoquet Brook built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1985.

What condition is Route 169 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 April 2023.

How much traffic does Route 169 over Mashamoquet Brook carry?

About 4,200 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is Route 169 over Mashamoquet Brook?

The structure is 39 ft (11.9 m) long with a longest span of 36 ft (11 m) and a deck 31 ft wide.

Who owns Route 169 over Mashamoquet Brook?

It is owned by the State Highway Agency.