Colorado Public Radio
https://www.cpr.org/2019/09/03/plutonium-test-results-stall-plan-for-toll-road-near-rocky-flats/
Denver Post
https://www.denverpost.com/2019/09/03/jefferson-parkway-interchange-not-moving-forward/
Westword
https://www.westword.com/news/jefferson-parkway-stalled-by-hot-soil-sample-outside-rocky-flats-11468710
CBS4 Denver
https://denver.cbslocal.com/2019/09/02/jefferson-parkway-encouraged-broomfield-decision/