US Bridges

N Howland RD over Mile Brook

Poor

Penobscot County, Maine · 2 MI N #155 · Structure no. 5110

Built
1977
48 years old
Condition
Poor
inspected August 2023
Type
Culvert
Steel
Length
46 ft
2 main spans
Daily traffic
584
2016 count
Owner
State
State Highway Agency

About this bridge

N Howland RD over Mile Brook is a steel culvert carrying N Howland RD over Mile Brook in Penobscot County, Maine. It was built in 1977, so it is 48 years old, younger than the Maine average of 53.7 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 584 vehicles a day, roughly 5% of them trucks, projected to reach 934 by 2036. The structure is 46 ft (13.9 m) long. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesN Howland RD
CrossesMile Brook
Location2 MI N #155
RouteCounty Highway 0
CountyPenobscot County
StateMaine
Coordinates45.25997, -68.66861
Functional classRural Major Collector

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
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating49.3 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length46 ft (13.9 m)
Longest span21 ft (6.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic584 (2016)
Projected traffic934 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 N Howland RD over Mile Brook built?

It was built in 1977, making it 48 years old in 2025.

What condition is N Howland RD over Mile Brook 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 August 2023.

How much traffic does N Howland RD over Mile Brook carry?

About 584 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is N Howland RD over Mile Brook?

The structure is 46 ft (13.9 m) long with a longest span of 21 ft (6.5 m).

Who owns N Howland RD over Mile Brook?

It is owned by the State Highway Agency.