Basis of Presentation	3 Months Ended
Mar. 31, 2020
Basis of Presentation
Basis of Presentation	Note 2—Basis of Presentation Interim condensed consolidated financial statements — The interim condensed consolidated financial statements for the three month period ended March 31, 2020 and 2019 have been prepared in accordance with Rule 10-01 of Regulation S-X of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). As such, certain disclosures, which would substantially duplicate the disclosures contained in our Annual Report on Form 10-K, filed on February 24, 2020, which contains our audited consolidated financial statements for the year ended December 31, 2019, have been omitted. This Form 10-Q should be read in conjunction with our most recent Annual Report on Form 10-K. The interim financial information is unaudited. In the opinion of management, the interim information includes all adjustments (consisting of normal recurring adjustments) necessary for the fair presentation of the interim financial information. Customer concentration — We operate in multiple industry segments encompassing the construction of commercial, industrial and public works infrastructure assets primarily throughout the United States. Typically, the top ten customers in any one calendar year generate revenue that is approximately 50% of total revenue; however, the group that comprises the top ten customers varies from year to year. For the three months ended March 31, 2020 and 2019, approximately 50.1% and 49.1%, respectively, of total revenue was generated from our top ten customers. For the three months ended March 31, 2020, one pipeline customer represented approximately 11.3% of total revenue and for the three months ended March 31, 2019 no one single customer represented greater than 10.0% of total revenue.

Basis of Presentation

3 Months Ended

Mar. 31, 2020

Note 2—Basis of Presentation

Interim condensed consolidated financial statements — The interim condensed consolidated financial statements for the three month period ended March 31, 2020 and 2019 have been prepared in accordance with Rule 10-01 of Regulation S-X of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). As such, certain disclosures, which would substantially duplicate the disclosures contained in our Annual Report on Form 10-K, filed on February 24, 2020, which contains our audited consolidated financial statements for the year ended December 31, 2019, have been omitted.

This Form 10-Q should be read in conjunction with our most recent Annual Report on Form 10-K. The interim financial information is unaudited. In the opinion of management, the interim information includes all adjustments (consisting of normal recurring adjustments) necessary for the fair presentation of the interim financial information.

Customer concentration — We operate in multiple industry segments encompassing the construction of commercial, industrial and public works infrastructure assets primarily throughout the United States. Typically, the top ten customers in any one calendar year generate revenue that is approximately 50% of total revenue; however, the group that comprises the top ten customers varies from year to year. For the three months ended March 31, 2020 and 2019,

approximately 50.1% and 49.1%, respectively, of total revenue was generated from our top ten customers. For the three months ended March 31, 2020, one pipeline customer represented approximately 11.3% of total revenue and for the three months ended March 31, 2019 no one single customer represented greater than 10.0% of total revenue.