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This paper describes a bridge coating operation and maintenance manual that was developed for the City of Vancouver which operates and maintains an inventory of 33 bridges with coated steel elements.
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This paper examines the restoration of the Robert F. Kennedy (Triborough) Bridges - lead removal and painting approaches for the three bridges which compose one of the largest and most controversial structures in NYC. The techniques employed reflect typical approaches as well as some unique operations associated with the rehabilitation of major bridge structures.
The County of Madison, MS. experienced severe degradation of a major pump station in their system that was less than 10 years old. They contracted with Waggoner Engineering of Jackson, MS. to design a rehabilitation system as well as increase the structural integrity with the addition of some support walls. The project created scheduling issues due to the addition of new concrete structures to the pump station. The use of innovative coatings technologies that offered the ability to apply corrosion resistant linings over green concrete structures, dramatically enhanced the project schedule and reduced overall costs.
Many pipelines within water and wastewater treatment plants that were constructed within the last 50 years are nearing the end of their service lives. Owners have invested in condition assessments to help them make the difficult decision to repair or replace these pipelines.
This paper identifies the problems and challenges with the making of the Bridge Brothers documentary, from its inception to the distribution. It will discuss the intent of the film from the perspective of the filmmakers, and the bridge painting contractor. The documentary explains the importance of re-painting and rehabilitating our nation’s bridges, while exploring life on the bridge for the industrial bridge painters (Bridge Brothers) on the Commodore Barry and Walt Whitman Bridges in Philadelphia.
The South Valley Sewer District, located outside of Salt Lake City, Utah, experienced severe degradation of the concrete substrate the Membrane Basins at the Jordan Basin WRF. The Bowen Collins & Associates designed facility initially opened for service in July of 2012. By 2017 the facility was showing significant effects of concrete deterioration from chemical attack, caused by citric acid and sodium hypochlorite used as a part of the cleaning procedures in the membrane basins.
The EPA estimates it will cost $390 billion over the next 20 years to repair or replace the crumbling wastewater infrastructure. Replacing infrastructure is costly, and in light of current economic conditions and worldwide budget cuts, often impossible to do. Alternatively, the use of single coat, fast cure high performance epoxy linings to rehabilitate sewage pipelines instead of replacing them will save municipalities considerable money and time, making it not only possible but practical for municipalities to protect their local environments today from sewage leaks.
Chloride induced corrosion of steel reinforcement in concrete structural elements is a major worldwide problem [1]. Chlorides can be introduced into the concrete via de-icing salts, seawater, high salinity groundwater or sabkha soils [1.2]. This leads to localised breakdown of the normally passive steel reinforcement in the form of pitting corrosion [2].
Houston’s water system serves more than 4.5 million people regionally and produces more than 146 billion gallons of treated water every year. The city has more than 300 above-grade water line crossings, some of which have been in service for over 75 years. In 2012, Houston Public Works (HPW) implemented a program to inspect every above-grade water line crossing across the city.
CLTWater is one of the largest water entities in the Southeast region, managing a total of ten water and wastewater treatment plants serving a population of approximately one million. The MCWWMF is the largest wastewater treatment plant of five wastewater facilities owned and operated by CLTWater, rated at a 64 MGD treatment capacity and accounting for over half of CLTWater’s wastewater treatment system.
Adit towers are generally vertical, large diameter concrete pipes that serve as vaults for valves used to drain and fill a reservoir. The tower runs from several feet above the waterline down through the reservoir and into the reservoir bed for some distance. Many of these towers and reservoirs are old and deteriorating, as the United States suffers from an aged infrastructure.