US Bridges

Wayne Avenue over Sligo Creek

Good

Montgomery County, Maryland · At Manchester Avenue · Structure no. 200000M-0162010

Built
1960
65 years old, rebuilt 2004
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
75 ft
2 main spans
Daily traffic
19,450
2011 count
Owner
State
State Highway Agency

About this bridge

Wayne Avenue over Sligo Creek is a prestressed concrete box beam or girders - multiple carrying Wayne Avenue over Sligo Creek in Montgomery County, Maryland. It was built in 1960 and reconstructed in 2004, so it is 65 years old, older than the Maryland average of 52.6 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 19,450 vehicles a day, roughly 5% of them trucks, projected to reach 23,925 by 2031. The structure is 75 ft (22.9 m) long and 62 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesWayne Avenue
CrossesSligo Creek
LocationAt Manchester Avenue
RouteCounty Highway 621
Coordinates38.99974, -77.01096
Functional classUrban Collector

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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating84.4 US tons
Inventory rating50.5 US tons

Structure

MaterialPrestressed Concrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length75 ft (22.9 m)
Longest span36 ft (11 m)
Deck width62 ft (18.9 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,450 (2011)
Projected traffic23,925 by 2031
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Wayne Avenue over Sligo Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2004.

What condition is Wayne Avenue over Sligo Creek 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 July 2023.

How much traffic does Wayne Avenue over Sligo Creek carry?

About 19,450 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Wayne Avenue over Sligo Creek?

The structure is 75 ft (22.9 m) long with a longest span of 36 ft (11 m) and a deck 62 ft wide.

Who owns Wayne Avenue over Sligo Creek?

It is owned by the State Highway Agency.