US Bridges

Nobles Mill Road over Deer Creek

PoorPosted for load

Harford County, Maryland · 0.8 MI E Main ST · Structure no. 200000H-0160010

Built
1883
142 years old, rebuilt 1998
Condition
Poor
inspected November 2023
Type
Truss - Thru
Steel
Length
152 ft
1 main span
Daily traffic
70
2019 count
Owner
County
County Highway Agency

About this bridge

Nobles Mill Road over Deer Creek is a steel truss - thru carrying Nobles Mill Road over Deer Creek in Harford County, Maryland. It was built in 1883 and reconstructed in 1998, so it is 142 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 70 vehicles a day, roughly 5% of them trucks, projected to reach 90 by 2039. The structure is 152 ft (46.3 m) long and 14 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNobles Mill Road
CrossesDeer Creek
Location0.8 MI E Main ST
RouteCounty Highway 171
Coordinates39.61769, -76.23748
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating15 US tons
Inventory rating9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 15
Structure length152 ft (46.3 m)
Longest span148 ft (45.1 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4 m)
Vertical clearance over deck24 ft (7.3 m)

Traffic and service

Average daily traffic70 (2019)
Projected traffic90 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Nobles Mill Road over Deer Creek built?

It was built in 1883, making it 142 years old in 2025. It was reconstructed in 1998.

What condition is Nobles Mill Road over Deer Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does Nobles Mill Road over Deer Creek carry?

About 70 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Nobles Mill Road over Deer Creek?

The structure is 152 ft (46.3 m) long with a longest span of 148 ft (45.1 m) and a deck 14 ft wide.

Who owns Nobles Mill Road over Deer Creek?

It is owned by the County Highway Agency.