US Bridges

Mount Archer Road over Eight Mile River

Good

New London County, Connecticut · 0.2 MI W of Route 156 · Structure no. 04723

Built
1966
59 years old
Condition
Good
inspected September 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
350
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mount Archer Road over Eight Mile River is a prestressed concrete box beam or girders - multiple carrying Mount Archer Road over Eight Mile River in New London County, Connecticut. It was built in 1966, so it is 59 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 350 vehicles a day, roughly 7% of them trucks, projected to reach 520 by 2042. The structure is 62 ft (18.9 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMount Archer Road
CrossesEight Mile River
Location0.2 MI W of Route 156
RouteCity Street 0
Coordinates41.40482, -72.34445
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating47 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length62 ft (18.9 m)
Longest span56 ft (17.1 m)
Deck width24 ft (7.2 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2022)
Projected traffic520 by 2042
Trucks7%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Mount Archer Road over Eight Mile River built?

It was built in 1966, making it 59 years old in 2025.

What condition is Mount Archer Road over Eight Mile River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2022.

How much traffic does Mount Archer Road over Eight Mile River carry?

About 350 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Mount Archer Road over Eight Mile River?

The structure is 62 ft (18.9 m) long with a longest span of 56 ft (17.1 m) and a deck 24 ft wide.

Who owns Mount Archer Road over Eight Mile River?

It is owned by the Town or Township Highway Agency.