US Bridges

S-26-1315 over Grissom Parkway Tunnel

Good

Horry County, South Carolina · In Myrtle Beach · Structure no. 000000000009798

Built
2002
23 years old
Condition
Good
inspected July 2023
Type
Arch - Deck
Concrete
Length
42 ft
1 main span
Daily traffic
55,000
2023 count
Owner
State
State Highway Agency

About this bridge

S-26-1315 over Grissom Parkway Tunnel is a concrete arch - deck carrying S-26-1315 over Grissom Parkway Tunnel in Horry County, South Carolina. It was built in 2002, so it is 23 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 55,000 vehicles a day, roughly 3% of them trucks, projected to reach 68,750 by 2043. The structure is 42 ft (12.8 m) long and 141 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesS-26-1315
CrossesGrissom Parkway Tunnel
LocationIn Myrtle Beach
RouteState Highway 1315
Coordinates33.74761, -78.84773
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.5 US tons
Inventory rating76.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length42 ft (12.8 m)
Longest span42 ft (12.8 m)
Deck width141 ft (42.9 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,000 (2023)
Projected traffic68,750 by 2043
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S-26-1315 over Grissom Parkway Tunnel built?

It was built in 2002, making it 23 years old in 2025.

What condition is S-26-1315 over Grissom Parkway Tunnel in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does S-26-1315 over Grissom Parkway Tunnel carry?

About 55,000 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-26-1315 over Grissom Parkway Tunnel?

The structure is 42 ft (12.8 m) long with a longest span of 42 ft (12.8 m) and a deck 141 ft wide.

Who owns S-26-1315 over Grissom Parkway Tunnel?

It is owned by the State Highway Agency.