US Bridges

SH 91 NB over Iron Ore Creek

Fair

Grayson County, Texas · 0.2 MI S of SP 503 · Structure no. 010920004702079

Built
1955
70 years old, rebuilt 1985
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
175 ft
7 main spans
Daily traffic
5,622
2020 count
Owner
State
State Highway Agency

About this bridge

SH 91 NB over Iron Ore Creek is a concrete slab carrying SH 91 NB over Iron Ore Creek in Grayson County, Texas. It was built in 1955 and reconstructed in 1985, so it is 70 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 5,622 vehicles a day, roughly 25% of them trucks, projected to reach 6,410 by 2033. The structure is 175 ft (53.3 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSH 91 NB
CrossesIron Ore Creek
Location0.2 MI S of SP 503
RouteState Highway 91
CountyGrayson County
StateTexas
Coordinates33.71746, -96.56029
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadOther
Structure length175 ft (53.3 m)
Longest span25 ft (7.6 m)
Deck width54 ft (16.5 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,622 (2020)
Projected traffic6,410 by 2033
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$718,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 91 NB over Iron Ore Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1985.

What condition is SH 91 NB over Iron Ore 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 October 2024.

How much traffic does SH 91 NB over Iron Ore Creek carry?

About 5,622 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is SH 91 NB over Iron Ore Creek?

The structure is 175 ft (53.3 m) long with a longest span of 25 ft (7.6 m) and a deck 54 ft wide.

Who owns SH 91 NB over Iron Ore Creek?

It is owned by the State Highway Agency.