November 2019 Vol. 74 No. 11


CGA DIRT Report Shows Excavation Damages Increased in 2018

The Common Ground Alliance (CGA), the stakeholder-driven organization dedicated to protecting underground utility lines, people who dig near them and their communities, recently announced its findings from the 2018 Damage Information Reporting Tool (DIRT) Report. 

The report, which analyzes all 2018 data submitted anonymously and voluntarily by facility operators, utility locating companies, one call centers, contractors, regulators and others, used a refined statistical modeling process to estimate that 509,000 excavation-related damages to underground facilities occurred in 2018, compared to the 2017 estimate of 439,000 damages. 

CGA, working with statistical analysis consultant Green Analytics, also found that damages per 1,000 One Call Center transmissions (the total number of times a “call before you dig” center notified a member utility of someone’s intent to dig) increased slightly from 2017 to 2018, along with a similarly small increase in damages per million dollars of construction spending. 

While these increases are noteworthy, it’s important to frame them in the context of more than a decade of mostly year-over-year decreases in estimated damages during the past 15 years, dating back to the first DIRT Report in 2004. 

Among all damage reports with an identified and known root cause, the top reported root cause category in the 2018 DIRT Report was “excavation issue.” This encompasses a variety of reported process problems, including excavating prior to verifying marks by test-hole, excavating with faded or unmaintained utility marks, and excavating with mechanized equipment within a “hand dig” zone, just to name a few. 

Root cause categories 

The 2018 DIRT Report identified the following root cause categories for all reported damages with an identified and known root cause: 

  • Excavation issues – 31 percent
  • Notification not made – 23 percent
  • Locating issues – 21 percent
  • Other notification issue – 13 percent

For the second consecutive year, the DIRT Report includes analysis of when damages occur, by month and day of the week. These findings are a helpful tool to damage prevention stakeholders who are looking for the most strategic times to share important safety messages with professional excavators and the general digging public. Specifically, the report found the following: 

  • The month with the most damages nationwide in 2018 was August, with 36,571 reported events in DIRT (11 percent of all reported events).
  • October 2018 was the month with the second-most reported damages, with 32,886 reported events in DIRT (10 percent of all reported events), as daylight waned, and colder weather approached in most of the country.
  • Wednesday was the day of the week in 2018 when damages were most likely to occur, with 19.7 percent of reported events occurring mid-week.

“Damage prevention stakeholders will continue to be up against familiar challenges – increased construction spending, labor shortages, new infrastructure buildouts for fiber-to-the-premises and 5G technology,” said Sarah Magruder Lyle, president and CEO of CGA. “The analysis included in the DIRT Report, in conjunction with the use of CGA Best Practices and collaborative efforts to educate on the importance of calling 811 prior to digging, provides stakeholders with the tools needed to make damage prevention programs more effective.” 

CGA has produced an interactive DIRT Dashboard accessible to the public through its website, allowing users to view and query the data through the lens of a specific element, such as on a state level or for certain utility or excavation types. This dashboard features a series of graphs and other visual tools to allow users to identify areas where they can have the biggest positive impact. 

“While the DIRT Report provides the most comprehensive data and analysis on underground utility damage, it’s only as strong as the data we receive,” said Deanna Centurion, co-chair of CGA’s Data Reporting and Evaluation Committee and principal at Cyera Strategies. “We encourage all damage prevention stakeholders to voluntarily submit data for 2019 to help make next year’s report even stronger.” 

The complete DIRT Annual Report for 2018 is available for download at; stakeholders interested in submitting data to the 2019 report or establishing a Virtual Private Dirt account should visit 

CGA is a member-driven association of nearly 1,700 individuals, organizations and sponsors in every facet of the underground utility industry. Established in 2000, CGA is committed to saving lives and preventing damage to North American underground infrastructure by promoting effective damage prevention practices.  

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