Approvals & Testing

• October 2011 Approval - City of London (UK) Recommends Keyhole Coring & Reinstatement as a Means of Reducing Traffic CongestionKeyhole coring and reinstatement has been recognized by the City of London and Transport for London as one of the principal means of reducing the impact of road works on traffic congestion and has recommended the process to contractors, utilities, highway authorities and equipment suppliers as a means to reduce the impact of road works on traffic congestion.

• January 2011 Approval - Clarke County Keyhole SpecificationsClarke County (Las Vegas, Nevada) releases Keyhole Standards Clarke County and surrounding area.

• January 2011 Approval - M.A.G County Keyhole Specifications Maricopa Association of Governments (Arizona) releases Keyhole Standards for Phoenix and surrounding area.

• January 2011 Report - South West Gas Keyhole OverviewOverview of Keyhole use at South West Gas and the history of its implementation.

• January 2011 Report - Model Municipal Regulatory Language for Coring and ReinstatementOverview of Keyhole Municipal Approval Criteria

• September 2010 Approval - North Carolina D.O.T. Utilibond Approval of use of Utilibond by North Carolina D.O.T..

• November 2009 Approval - Illinois D.O.T. UtilibondApproval of use of Utilibond by Illinois D.O.T..

• October 2009 Testing - Construction Technology Laboratories testing of Utilibond Fracture pattern for test indicates Utilibond is stronger than the substrate material.

• November 2007 Approval - City of Toronto Keyhole Standards - T.S. 4.70 Technical DocumentThe City of Toronto releases comprehensive keyhole standards.

• July 2007 Approval - City of Overland Park, KansasOverview and acceptance of Keyhole use in Overland Park, Kansas

• May 2006 Approval - New York City D.O.T Keyspan (National Grid) and Con Edison win approval for Keyhole Coring and Reinstatement from New York City.

• February 2005 Approval -Washington Gas Keyhole Specifications yJurisdictional Approval of Keyhole Restoration Technology.

• June 2005 Report - The Science of Utilibond A comprehensive report on the efficacy of Utilibond and its use in reinstating keyhole cores back into the roadway.

• June 2004 Approval - City of Dallas Keyhole Approval Street Cut Standards and Implementation, Transport and Telecommunications Committee, Dallas.

• April 2004 Report - The National Research Council Canada and U.S. Army corps of Engineers Utility Road Cut Study – Toronto Field experiment.

• March 2004 White Paper - NASTT PresentationHealing the Utility Cut, A Unique Coring and Pavement Restoration Process.

• July 2003 Testing - The Lange Report Utilibond Testing, Department of Civil Engineering University of Illinois at Urbana-Champaign.

• April 2003 Testing - Golder Associates Utilibond Report The only longitudinal testing on the keyhole coring process, conducted by Golder Associates.