There's evidence of "rampant, unscientific and illegal (sand) mining" at various locations along the Yamuna in UP's Gautam Budh Nagar district, a union ministry of environment and forest probe has
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/illegal-miners-violating-every-green-norm-defying-sc-and-allahabad-hc-orders-panel
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gautam-budha-nagar
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/illegal-trade
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-environment-and-forests-moef
[8] http://admin.indiaenvironmentportal.org.in/thesaurus/national-green-tribunal-ngt
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/supreme-court
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/high-court
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mines-act-1957
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[13] http://admin.indiaenvironmentportal.org.in/thesaurus/state-environment-impact-assessment-authority-seiaa
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/state-pollution-control-board-spcb-0