abstract concept ditch drain eyes gravel magical pipes rocks stones water wet cover entrance hole lid manhole metal plumber round sewer shape Underground breakage broken circular concrete corroded corrosion cracked cracks damage damaged deteriorated deterioration drain-pipes drainage pipe polluted pollution ripples rippling river riverside urban wavelets background backgrounds barrel build connect construction gay gender group heavy industrial industry infrastructure iron large liner material materials metallic objects pattern pile pink pipeline plant plumbing project queer repair rust rusty shabby site steel street technology tube tubing used wear work