US Bridges

US 220 over Mill Run

Fair

Allegany County, Maryland · 0.9 Mile South of Md 830B · Structure no. 100000010074010

Built
1900
125 years old, rebuilt 1950
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
21 ft
1 main span
Daily traffic
7,111
2009 count
Owner
State
State Highway Agency

About this bridge

US 220 over Mill Run is a concrete slab carrying US 220 over Mill Run in Allegany County, Maryland. It was built in 1900 and reconstructed in 1950, so it is 125 years old, older than the Maryland average of 52.6 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 7,111 vehicles a day, roughly 8% of them trucks, projected to reach 8,418 by 2026. The structure is 21 ft (6.4 m) long and 46 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

Open in Google Maps
CarriesUS 220
CrossesMill Run
Location0.9 Mile South of Md 830B
RouteU.S. Route 220
CountyAllegany County
StateMaryland
Coordinates39.5235, -78.90574
Functional classRural Principal Arterial - Other

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 protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating75.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length21 ft (6.4 m)
Longest span20 ft (6.1 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,111 (2009)
Projected traffic8,418 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$64,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 220 over Mill Run built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1950.

What condition is US 220 over Mill Run 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 US 220 over Mill Run carry?

About 7,111 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 220 over Mill Run?

The structure is 21 ft (6.4 m) long with a longest span of 20 ft (6.1 m) and a deck 46 ft wide.

Who owns US 220 over Mill Run?

It is owned by the State Highway Agency.