Keystone Wye, Road interchange in Black Hills, South Dakota
The Keystone Wye features two structural glued laminated timber bridges forming a three-level interchange connecting U.S. Route 16 and US 16A.
Engineers Clyde Jundt and Kenneth C. Wilson designed this infrastructure project in 1967, incorporating wooden single-hinged arches into the bridge construction.
The interchange name originates from Senator Peter Norbeck's 1930s roadway system, which connected tourist destinations like Mount Rushmore and Black Elk Peak.
A 4.5 million dollar renovation in 2021 replaced concrete decks with timber and asphalt overlay, extending the bridge's lifespan by 50 years.
Three wooden arch pieces that failed quality tests were transformed into a pyramidal sculpture, later relocated near the Sitting Bull Crystal Cavern Dance Pavilion.
Location: South Dakota
GPS coordinates: 43.92470,-103.44200
Latest update: September 23, 2025 16:45
Mount Rushmore
5.3 km
Crazy Horse Memorial
17.5 km
Mount Rushmore National Memorial
5.2 km
Needles
13 km
Black Elk Peak
9.7 km
Custer State Park
20 km
Pactola Lake
16.5 km
Stratobowl
9.7 km
Black Hills Institute of Geological Research, Inc.
10.8 km
Sheridan Lake
5.6 km
Black Elk Wilderness
11.1 km
Rushmore Cave
10.4 km
Black Hills Playhouse
13.2 km
Sitting Bull Crystal Cavern Dance Pavilion
11.6 km
Crazy Horse Memorial
18.6 km
Lincoln Borglum Museum
5.4 km
Big Thunder Gold Mine
3.9 km
1881 Courthouse Museum
21.8 km
Hermosa Masonic Lodge
22.1 km
The National Presidential Wax Museum
4.2 km
Keystone School
3.7 km
Peter Norbeck Summer House
13.7 km
Custer County Courthouse
21.8 km
Black Elk Peak Lookout Tower
9.7 km
Mount Coolidge Lookout Tower
20.3 km
Sunday Gulch Trail
13.3 km
Peter Norbeck Outdoor Education Center
18.3 km
Civilian Conservation Corps Museum
9.7 kmReviews
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