US Bridges

SH 21 over LA Nana Creek

Fair

Nacogdoches County, Texas · 0.5 MI E of Bus 59 · Structure no. 111740011808055

Built
1941
84 years old, rebuilt 1963
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
160 ft
8 main spans
Daily traffic
1,012
2023 count
Owner
State
State Highway Agency

About this bridge

SH 21 over LA Nana Creek is a concrete slab carrying SH 21 over LA Nana Creek in Nacogdoches County, Texas. It was built in 1941 and reconstructed in 1963, so it is 84 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 1,012 vehicles a day, roughly 6% of them trucks, projected to reach 10,651 by 2040. The structure is 160 ft (48.8 m) long and 57 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSH 21
CrossesLA Nana Creek
Location0.5 MI E of Bus 59
RouteState Highway 7
CountyNacogdoches County
StateTexas
Coordinates31.60085, -94.64825
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadH 15
Structure length160 ft (48.8 m)
Longest span20 ft (6.1 m)
Deck width57 ft (17.5 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,012 (2023)
Projected traffic10,651 by 2040
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$19,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 21 over LA Nana Creek built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1963.

What condition is SH 21 over LA Nana 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 2024.

How much traffic does SH 21 over LA Nana Creek carry?

About 1,012 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SH 21 over LA Nana Creek?

The structure is 160 ft (48.8 m) long with a longest span of 20 ft (6.1 m) and a deck 57 ft wide.

Who owns SH 21 over LA Nana Creek?

It is owned by the State Highway Agency.