US Bridges

Mh 326 (marsh Ln) over Lp 12

Fair

Dallas County, Texas · 1.70 MI W of Lp 354 · Structure no. 180570035305137

Built
1977
48 years old
Condition
Fair
inspected June 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
269 ft
2 main spans
Daily traffic
18,143
2019 count
Owner
State
State Highway Agency

About this bridge

Mh 326 (marsh Ln) over Lp 12 is a prestressed concrete stringer/multi-beam or girder carrying Mh 326 (marsh Ln) over Lp 12 in Dallas County, Texas. It was built in 1977, so it is 48 years old, older than the Texas average of 44.4 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 18,143 vehicles a day, projected to reach 45,000 by 2036. The structure is 269 ft (82 m) long and 94 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesMh 326 (marsh Ln)
CrossesLp 12
Location1.70 MI W of Lp 354
RouteCity Street 41
CountyDallas County
StateTexas
Coordinates32.86134, -96.85547
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+1 approach)
Design loadHS 20
Structure length269 ft (82 m)
Longest span109 ft (33.2 m)
Deck width94 ft (28.7 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,143 (2019)
Projected traffic45,000 by 2036
Trucks0%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$45,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mh 326 (marsh Ln) over Lp 12 built?

It was built in 1977, making it 48 years old in 2025.

What condition is Mh 326 (marsh Ln) over Lp 12 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 June 2022.

How much traffic does Mh 326 (marsh Ln) over Lp 12 carry?

About 18,143 vehicles per day (2019 count).

How long is Mh 326 (marsh Ln) over Lp 12?

The structure is 269 ft (82 m) long with a longest span of 109 ft (33.2 m) and a deck 94 ft wide.

Who owns Mh 326 (marsh Ln) over Lp 12?

It is owned by the State Highway Agency.