US Bridges

FM 121 over Conner Creek

Fair

Grayson County, Texas · 0.6 MI W of SH 160 · Structure no. 010920072902017

Built
1954
71 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
1,278
2020 count
Owner
State
State Highway Agency

About this bridge

FM 121 over Conner Creek is a concrete culvert carrying FM 121 over Conner Creek in Grayson County, Texas. It was built in 1954, so it is 71 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 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 1,278 vehicles a day, projected to reach 1,080 by 2031. The structure is 23 ft (7 m) long. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesFM 121
CrossesConner Creek
Location0.6 MI W of SH 160
RouteState Highway 121
CountyGrayson County
StateTexas
Coordinates33.4393, -96.41361
Functional classRural Major Collector

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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadOther
Structure length23 ft (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 traffic1,278 (2020)
Projected traffic1,080 by 2031
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 121 over Conner Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is FM 121 over Conner 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 March 2023.

How much traffic does FM 121 over Conner Creek carry?

About 1,278 vehicles per day (2020 count).

How long is FM 121 over Conner Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns FM 121 over Conner Creek?

It is owned by the State Highway Agency.