Category: Department OrderSub Category: infra-projSeries: 1997No: 179Superseded by: DO_171_s2015File: DO_179_S1997.pdfDate: Friday, August 22, 1997Superseded Link: http://www.dpwh.gov.ph/dpwh/sites/default/files/issuances/DO_171_s2015.pdfTags: Guidelines Inspection Rate Physical Condition National Roads Bridges infra maintenance 179