Patrick Sparks, an engineer with Sparks Engineering Incorporated and President of Texas Dancehall Preservation Incorporated, discusses the restoration of the historic Hay Street Bridge in San Antonio and the work of the preservation organization.

Barry Stiefel, Professor in the Humanities and Social Sciences at the College of Charleston and Clemson University, discusses sustainability in preservation.

Derek Patton, Assistant Professor in the School of Polymers and High Performance Materials at The University of Southern Mississippi, discusses a National Science Foundation grant to advance the science of stone preservation.

NCPTT’s Jeff Guin interviews Jill Gotthelf, coordinator of an NCPTT-sponsored workshop, and John Anderson, instructional engineer at Robert Silman Associates, at the 2010 Association for Preservation Technology conference.

Kit Arrington, digital library specialist at the Library of Congress, discusses how the Library of Congress digitizes and shares documents online for long-term public access.

Robert Melnick, professor of landscape architecture at the University of Oregon and author of the article, “Climate Change and Landscape Preservation: A Twenty-first-century Conundrum", discusses topics addressed in the article.

Tony Rajer, Art Conservator with the Nek Chand Foundation and a conservation professor at the University of Wisconsin, discusses his interest in folk art and his work with the Rock Garden in Chandigarh, India.

In this audio file, NCPTT summer interns discuss their research. Rust conversion, herbicide usage, paint removal, and landscape maintenance are the topics discussed.

Aaron Lubeck, author of the book, Green Restorations, discusses his book and how it connects the sustainability movement with historic preservation.

Carla Schroer of Cultural Heritage Imaging discusses 3D digital rock art documentation and preservation. Techniques such as reflection transformation imaging and photogrammetry are covered.