US Bridges

Otterdale Mill Roa over Big Pipe Creek

Fair

Carroll County, Maryland · 0.25 MI S of Nasbaum RD · Structure no. 200000CL0226010

Built
1930
95 years old, rebuilt 1982
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
97 ft
2 main spans
Daily traffic
1,268
2021 count
Owner
County
County Highway Agency

About this bridge

Otterdale Mill Roa over Big Pipe Creek is a steel stringer/multi-beam or girder carrying Otterdale Mill Roa over Big Pipe Creek in Carroll County, Maryland. It was built in 1930 and reconstructed in 1982, so it is 95 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 1,268 vehicles a day, roughly 5% of them trucks, projected to reach 2,080 by 2041. The structure is 97 ft (29.7 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesOtterdale Mill Roa
CrossesBig Pipe Creek
Location0.25 MI S of Nasbaum RD
RouteCounty Highway 28
CountyCarroll County
StateMaryland
Coordinates39.61692, -77.16873
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating69.4 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length97 ft (29.7 m)
Longest span46 ft (14 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,268 (2021)
Projected traffic2,080 by 2041
Trucks5%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$550,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Otterdale Mill Roa over Big Pipe Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1982.

What condition is Otterdale Mill Roa over Big Pipe Creek 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 2023.

How much traffic does Otterdale Mill Roa over Big Pipe Creek carry?

About 1,268 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Otterdale Mill Roa over Big Pipe Creek?

The structure is 97 ft (29.7 m) long with a longest span of 46 ft (14 m) and a deck 21 ft wide.

Who owns Otterdale Mill Roa over Big Pipe Creek?

It is owned by the County Highway Agency.