UndergroundStructuralGeneralEditorialsWinter 2025 Follow up on Early Strength Testing
Christoph Goss, PhD, PE, PMP, F.ASCE
Read MoreIn my last column, I discussed the need for early strength testing in underground shotcrete…
StructuralRecreationalGeneralShotcrete Makes for Smoother, Safer Skateboarding
Kristin Dispenza, AOE
Read MoreEarly skateparks may have been made out of wood, but as the sport grew in popularity, concrete became the recommended material, providing a smoother, safer, and more durable surface. Shotcrete, specifically, became the best placement option for concrete because…
UndergroundStructuralGeneralShotcrete Placement for Initial Support: Climate Pledge Arena Tunnel Project
Mark Pinske, Elizabeth Lenker, and Paul Mockus
Read MoreThe Washington State Coliseum was an arena built for the 1962 Seattle World’s Fair. More than half a century later, in 2019, a $1B construction program began to redevelop and expand the arena. The redeveloped building, with a new name — Climate Pledge Arena — retains the historical roof, but
UndergroundStructuralGeneralShotcrete as Final Liner — Design Considerations
Andy Thompson
Read MoreThe use of shotcrete placement (often called sprayed concrete) for the final permanent structural lining of underground structures and facilities continues to increase around the world. Where non-uniform shapes are required, shotcreting provides…
ArchitecturalStructuralGeneralPractical Benefits of Shotcrete on Geotechnical Projects
Michael Klemp
Read MoreThis article covers the advantages of using shotcrete placement for soil nail projects. In permanent soil nail structures, shotcrete offers a wide variety of architectural finishes that can be produced economically and efficiently. This is in stark contrast to…
RepairStructuralGeneralLessons Learned on Spillway Shotcrete Overlay
Billy Roy, P.E.
Read MoreThe original Request for Bids specified that cast-in-place concrete be used, with no substitutions provided. After multiple site visits to better understand staging and access, debris removals, and placement logistics, KISC began to develop a value-engineered approach involving the use of air-entrained wet-process shotcrete to replace the cast-in-place specification…
RepairStructuralGeneralGoose Pond Dam Improvements – 2024 Honorable Mention Project
George Machikas
Read MoreThe rehabilitation of the Goose Pond Dam was initiated by the New Hampshire Department of Environmental Services to address significant leaking of the dam that threatened multiple downstream towns. Improvements included flattening the downstream slope, updating and improving the seepage collection system along the downstream toe of the dam…
ArchitecturalStructuralGeneralSlope Stabilization in Kicking Horse Canyon – 2024 Honorable Mention Project
Dan Pitts
Read MoreThe Kicking Horse Canyon Highway, part of the Trans-Canada Highway near Golden, British Columbia, has a rich history tied to the region’s rugged geography and vital transportation needs. Originally a narrow and winding route carved into the steep canyon walls, it was built in the early 1900s to connect
RepairStructuralGeneralIce Harbor Dam Rewinds and Turbine Runner Replacement – 2024 Outstanding Infrastructure Project
David Graham
Read MoreIce Harbor Lock and Dam was authorized by the River and Harbor Act of 1945. Constructed in 1956, the project includes a dam, a powerhouse, a navigation lock, two fish ladders, a removable spillway weir, and a juvenile fish bypass facility. It provides navigation, hydropower, flood risk management, fish and
RepairStructuralGeneralThe Diversity of Shotcrete
Clint Jenkins, Jason Bossier, and Joe Swann
Read MoreIt is truly paramount to recognize the diversity of solutions available because of the versatility that shotcrete offers. Shotcrete placement provided more efficient, sustainable and durable concrete solutions in these two cases than could have been achieved with a form-and-pour approach.