Repair Portal

RepairStructuralGeneralIce Harbor Dam Rewinds and Turbine Runner Replacement – 2024 Outstanding Infrastructure Project

David Graham

Ice 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

RepairInternationalGeneralModernization of the Water Treatment Plant in Poznan – 2024 Outstanding International Project

Wlodzimierz Czajka

According to the available documentation, the Iron Removal Building and the Rapid Filter Building were both put into operation in 1943, built mainly by prisoners of war from various nations.

RepairGeneralHemlock Reservoir Dam Improvements – 2024 Outstanding Rehabilitation & Repair Project

George Machikas

The Aquarian Water Company of CT authorized the repair and resurfacing of the Hemlock Dam. The dam, commissioned in 1928, is about 2 mi (3.2 km) from Fairfield, CT. Size is approximately 1100 ft (340 m) long and 75 ft (23 m) high.

RepairStructuralGeneralThe Diversity of Shotcrete

Clint Jenkins, Jason Bossier, and Joe Swann

It 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.

RepairUndergroundGeneralRelieving Water Pressure on Shotcrete Lining by Integrating a Drainage Mesh

Johnny Poulsen & Sergii Tabachnikov

Underground construction, especially a tunnel, is one of the most complex challenges in the field of civil engineering. Dolenco Drain is an innovative solution which addresses many of the difficulties with controlling or eliminating water pressure in an easy, safe, long-term, and cost-effective manner.

RepairUndergroundStructuralGeneralSummary of ‘Guideline on the Applicability of Fiber-Reinforced Shotcrete for Ground Support in Mines’

By Rym Msatef and Marc Jolin

This guide examines and provides a description of the common testing methods used for FRS and how to interpret the information generated for ground support in mines.

RepairArchitecturalStructuralGeneralGuide to ACI Shotcrete Documents

Lars Balck

RepairStructuralA Study on Low-Velocity Sprayed Mortars

Christine Poulin and Marc Jolin

RepairWhy Membership Benefits Refractory Contractors

Ted Sofis

In March 2024, at the ASA committee meetings in Austin, TX, the question came up about refractory contractors, and why that industry segment is so under-represented in the association. Considering my background, I felt qualified to address the issue. Much of my work involved shotcrete

RepairUndergroundStructuralThe Rondout Bypass Tunnel Shafts – Shotcrete Lining

Paul Madsen, Bade Sozer, Thomas Hennings, & Eileen Test

The Rondout-West Branch Tunnel (RWBT), a segment of the Delaware Aqueduct (the Aqueduct), was built from 1937 to 1944 and provides about 50% of New York City’s total water supply. The tunnel is concrete lined and has a finished inside diameter of 13.5 ft (4.1