US Bridges

Brighton Dam Road over Reddy Branch

Fair

Montgomery County, Maryland · 0.9 Miles East of Md 97 · Structure no. 200000M-0117010

Built
1910
115 years old, rebuilt 1975
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
743
2023 count
Owner
County
County Highway Agency

About this bridge

Brighton Dam Road over Reddy Branch is a steel stringer/multi-beam or girder carrying Brighton Dam Road over Reddy Branch in Montgomery County, Maryland. It was built in 1910 and reconstructed in 1975, so it is 115 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 5 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 743 vehicles a day, roughly 2% of them trucks, projected to reach 966 by 2043. The structure is 28 ft (8.5 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesBrighton Dam Road
CrossesReddy Branch
Location0.9 Miles East of Md 97
RouteCounty Highway 57
CountyMontgomery County
StateMaryland
Coordinates39.1844, -77.04605
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating110.1 US tons
Inventory rating62.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span25 ft (7.6 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic743 (2023)
Projected traffic966 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$41,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Brighton Dam Road over Reddy Branch built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1975.

What condition is Brighton Dam Road over Reddy Branch 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 September 2023.

How much traffic does Brighton Dam Road over Reddy Branch carry?

About 743 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Brighton Dam Road over Reddy Branch?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 25 ft wide.

Who owns Brighton Dam Road over Reddy Branch?

It is owned by the County Highway Agency.