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33 APPENDIX A Survey Questionnaire The following survey for this synthesis was mailed in January 2011 to 50 U.S. state highway agencies, the District of Columbia, and 13 provincial and territorial highway agencies in Canada to collect information about the use of waterproofing membranes on concrete bridge decks. A total of 51 responses were received, including 18 from agencies that have not used waterproofing membranes since 1994. Synthesis Survey Topic 42-07 Waterproofing Membranes for Concrete Bridge Decks 1. INTRODUCTION Dear Bridge Engineer: The Transportation Research Board (TRB) through its National Cooperative Highway Research Program (NCHRP) is preparing a syn- thesis on Waterproofing Membranes for Concrete Bridge Decks. This is being done under the sponsorship of the American Association of State Highway and Transportation Officials (AASHTO), in cooperation with the Federal Highway Administration (FHWA). The objective of this study is to compile and synthesize current practices, recent literature findings, and research-in-progress addressing the subject topic. The results of this study will be distributed through AASHTO, TRB, and FHWA in late 2011. This survey is being sent to U.S. state departments of transportation and Canadian provincial and territorial transportation agencies. If you are not the appropriate person at your agency to complete the survey, please forward it to the correct person. Please note that each section can be answered by a different person; however, only one person can work on the survey at a time (see questionnaire instructions below). Your agency's response to the survey is extremely important to this study. If your agency has not installed waterproofing membranes since 1994, there are only two questions to answer. If your agency has installed membranes, there are questions related to design, construc- tion, inspection, maintenance, and research. Please complete and submit this survey by February 11, 2011. We estimate that it should take no more than 60 minutes to complete. If you have any questions, please do not hesitate to contact our principal investigator Henry Russell at or 847-998- 9137. Supporting materials can be uploaded directly into the questionnaire, or you may e-mail them directly to Henry Russell or provide him with the appropriate links. Thank you very much for contributing to this synthesis of highway practice. KEY DEFINITION: FOR THE PURPOSE OF THIS SURVEY, A WATERPROOFING MEMBRANE IS DEFINED AS A THIN IMPERMEABLE LAYER THAT IS USED IN CONJUNCTION WITH A HOT MIX ASPHALT WEARING SURFACE. Please enter the date (MM/DD/YYY). _____________________________________ Please enter your contact information.______________________________________ First Name ___________________________________________________________ Last Name ___________________________________________________________ Title ________________________________________________________________ Agency/Organization __________________________________________________ Street Address ________________________________________________________ Suite ________________________________________________________________ City _________________________________________________________________