US Bridges

Milt Summers Road over Grindstone Run

Fair

Frederick County, Maryland · 0.13 Miles West of Md 17 · Structure no. 200000F-1612010

Built
1977
48 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
1,657
2022 count
Owner
County
County Highway Agency

About this bridge

Milt Summers Road over Grindstone Run is a steel stringer/multi-beam or girder carrying Milt Summers Road over Grindstone Run in Frederick County, Maryland. It was built in 1977, so it is 48 years old, younger 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 1,657 vehicles a day, roughly 10% of them trucks, projected to reach 2,465 by 2042. The structure is 45 ft (13.7 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesMilt Summers Road
CrossesGrindstone Run
Location0.13 Miles West of Md 17
RouteCounty Highway 246
CountyFrederick County
StateMaryland
Coordinates39.49317, -77.57176
Functional classRural Minor 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 protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating80 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length45 ft (13.7 m)
Longest span40 ft (12.2 m)
Deck width29 ft (8.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,657 (2022)
Projected traffic2,465 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Milt Summers Road over Grindstone Run built?

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

What condition is Milt Summers Road over Grindstone 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 May 2024.

How much traffic does Milt Summers Road over Grindstone Run carry?

About 1,657 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Milt Summers Road over Grindstone Run?

The structure is 45 ft (13.7 m) long with a longest span of 40 ft (12.2 m) and a deck 29 ft wide.

Who owns Milt Summers Road over Grindstone Run?

It is owned by the County Highway Agency.