Municipal Keyhole Standards & Approvals
March 2016: City of Lincoln, Nebraska. Keyhole Excavation and Core Reinstatement Specifcations
January 2016: City of Lancaster, Ohio. Keyhole Excavation and Core Reinstatement Specifcations
January 2015: City of Springville, Utah. Keyhole Excavation and Core Reinstatement Specifcations
January 2014: City of Chicago approve Keyhole Coring Reinstatement. (reference page 4-8)
July 2012: City of Windsor, Ontario. Keyhole Excavation and Core Reinstatement Specifcations
October 2011: City of London, United Kingdom. Keyhole Coring & Reinstatement Process Update
January 2011: Clarke County,Las Vegas, Nevada. Keyhole Excavation and Core Reinstatement Specifcations
January 2011: Maricopa Association of Governments, Arizona. Keyhole Standards
August 2009: Montgomery County, Maryland. Keyhole Excavation and Core Reinstatement Specifcations
May 2006: New York City, D.O.T. National Grid and Con Edison win approval for Keyhole Coring and Reinstatement from New York City
May 2006: New York City, D.O.T. National Grid and Con Edison win approval for Keyhole Coring and Reinstatement from New York City
February 2005: Washington Gas ,Maryland, District of Columbia & Virgina. Jurisdictional Approval of Keyhole Restoration Technology
June 2004: Dallas,Texas. Keyhole Approval