US Bridges

Is 70 Ramp 6 over Terrapin Branch

Fair

Howard County, Maryland · 0.06 Mile West of Md 32 · Structure no. 100000130089020

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
32 ft
Daily traffic
5,972
2007 count
Owner
State
State Highway Agency

About this bridge

Is 70 Ramp 6 over Terrapin Branch is a concrete culvert carrying Is 70 Ramp 6 over Terrapin Branch in Howard County, Maryland. It was built in 1972, so it is 53 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 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 5,972 vehicles a day, roughly 8% of them trucks, projected to reach 6,450 by 2027. The structure is 32 ft (9.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIs 70 Ramp 6
CrossesTerrapin Branch
Location0.06 Mile West of Md 32
RouteInterstate 70
CountyHoward County
StateMaryland
Coordinates39.30607, -76.95356
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadHS 20
Structure length32 ft (9.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,972 (2007)
Projected traffic6,450 by 2027
Trucks8%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Is 70 Ramp 6 over Terrapin Branch built?

It was built in 1972, making it 53 years old in 2025.

What condition is Is 70 Ramp 6 over Terrapin 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 April 2024.

How much traffic does Is 70 Ramp 6 over Terrapin Branch carry?

About 5,972 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is Is 70 Ramp 6 over Terrapin Branch?

The structure is 32 ft (9.7 m) long with a longest span of 10 ft (3 m).

Who owns Is 70 Ramp 6 over Terrapin Branch?

It is owned by the State Highway Agency.