co 79 ditch drainage
https://www.codot.gov/projects/archived-project-sites/co-79-resurfacing-irrigation-pipe-replacement/photo-gallery/co79-resurfacing-1.jpg/view
https://www.codot.gov/projects/archived-project-sites/co-79-resurfacing-irrigation-pipe-replacement/photo-gallery/co79-resurfacing-1.jpg/@@download/image/co79 resurfacing.jpg
co 79 ditch drainage