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COLORADO DEPARTMENT OF PUBLIC H•TH AND ENVIRONMENT, Water Qualiry•trol Division Amendment No. 5 -Rationale. Page 2, Permit No. CO-0027154 G. Discharge Points: Table 11-1 - Dischar a Points Outfgll.: :;. .W61' Source/Type' .. 30.-Day Avg/ Daily Max .. .: Flow; MGD 10:;yr/24-hr Event:Vol;: MG Pond Volume/ . .'Design.: C aci ; MG .: Receiving Water .. :...:. 001 SS/SR/PM 0.]6.8/]6.8 17.0 44.3 Foidel Creek OOZ SR 0-0.49/0.491 1,12 1.2 Foidel Creek 003 SR/SS 0.0.62/0.627 0.27 4.55 Foidel Creek 004 SR 0/0 0,35 0.61 Foidel Creek 005 MW/SR/PM 0.4.48/4.48 2.2 9.8 Foidel Creek 006 SR 0-0.54/0.536 0.27 0.92 Foidel Creek 007 MW/SS/SR/PM 0-3.6/3.62 0.76 2.97 Foidel Creek 008 SR/PM 0.1.6/1.62 7.1 10.35 Foidel Creek 009 SS/SR/PM 0.13.3/13.,3 3.87 5.6 Middle Creek DI011 SS/SR/PM 0.4.98/4.98 3.4 8.06 Fish Creek 016q SS/SR/PM 0.4.39/4.39 1.36 1.82 Foidel Creek 01711 SR/PM 0-8.08/8.08 1.36 1.82 Middle Creek 020 nor constructed vet NA NA NA NA MW means mine water, SR means surface runoff, SS means spoils spring, PM means post mining area H Outfalls being deleted via this permit amendment III. DESCRIPTION OF AMENDMENT By letter dated June 16, 1998, the permittee requested deletion ojtwo autfalls, numbers 016 and 017. Outfall 016 is the discharge point jar Pond M; outfall 017 is the discharge point jar Pond K. Both outfalls have been approved for removal from the permittee's surface runoff treatment system by the Colorado Division ojMineraCs and Geology (CDMG). And, by letter dated August 18, 1999, the perminee requested deletion of outfall number 0I0. This outfall is the discharge point jar pond M3S. Final bond release for these three sites, as well as jar pond M3N covered under general permit certification number COG850013, has been granted by the CDMG. The surface property owner ojrhe area upon which Pond M is located has asked that this pond remain in place permanently jar use as a stock watering pond. This pond's outfall would no longer serve as a discharge point from an industrial facility; it is considered to be a discharge from an agricultural operation and, as such, is exempt from Colorado Discharge Permit System (CDPS) requirements. The CDMG has approved of the pond remaining for this use. The permittee is the owner of the property upon which Pond K is located. Pond K is required to be removed under the CDMG approval. The pond area will be reclaimed. The CDMG has also approved Pond M3S (outfal[ 010) to remain as a stock tivatering pond, thus it will also remain after final bond release. i Table ll-1 indicates that spoils springs may be sources to Ponds M3S and M (outfalfs 010 and 016, respectively). This is because the permittee, when they applied jar authorization jar these outfalls, believed that the possibility existed jar spoils springs to develop that might contribute to the discharges.