The Denver Post: Denver’s city auditor found transparency and oversight problems with how the Department of Transportation and Infrastructure handled the 16th Street renovation project, including when construction crews uncovered part of a historic brick sewer system that added $18 million and nearly a year of work.

Despite knowing that there are 69 miles of partially unmapped brick sewers under the city dating back to the 1880s, transportation officials did not include them as a possible factor in official documents guiding PCL Construction’s work on the project, Denver City Auditor Timothy O’Brien wrote in the report published Thursday.

This caused a strained relationship with the company after city officials insisted the extra cost should be covered by PCL. City leaders later accepted a settlement agreement and paid the additional $18 million, but those decisions were not sent to City Council for approval.

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