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Pond 005 was permitted as a permanent impoundment that treats runoff from 285.6 <br />disturbed acres which drain to Dry Creek. <br />Pond 006 was permitted as a permanent impoundment that is located in a watershed <br />that is tributary to Hubberson Gulch. Phase I construction of the pond was <br />completed in 1989. Phase II consisted of modifying the existing principal spillway <br />to increase the storage capacity of the pond. Phase III included construction of a <br />clean water diversion ditch that will divert 102.6 acres of undisturbed area into the <br />drainage to the west. The Phase IV design raised the invert of the principal and <br />emregency spillways and included using the lower portion of the B-pit as a pre- <br />settling basin. Construction was completed in 1998. Phase V was constructed in <br />2000 by raising the principal spillway 1.5 feet. The Phase V design also showed the <br />pre-settling basin at the bottom of the B-pit is no longer needed. <br />Pond 009, a temporary sediment pond, treats runoff from the smaller disturbedarea <br />which drains to Sage Creek, roughly a 439 acre watershed. Construction of the <br />pond was completed in 1991. <br />Pond 015 was constructed during the summer of 1999 in preparation for development <br />in the Seneca II-W south extension area. The pond treats runoff from a 407 acre <br />watershed that drains into Sage Creek of which only 29.5 acres will be disturbed by <br />mining activities. <br />Pond 016 was constructed in the summer of 2000 in the Seneca II-W south extension <br />area. The pond will treat runoff from 382.2 total acres of which 77.3 will be <br />disturbed land. Discharge from this pond goes into an unnamed tributary of <br />Hubberson Gulch. <br />Pond 017 is also proposed for construction in the Seneca II-W south extension area. <br />This is the southernmost pond. It will treat runoff from a 955 acre watershed, of <br />which approximately 30 acres are proposed to be disturbed. This pond will drain <br />into Hubberson Gulch. <br />D. Acid-forming and Toxic-forming Spoil <br />The applicant has submitted detailed analysis of the geochemical characteristics of <br />the overburden and interburden found in the Seneca II-W Mine permit area. The <br />sampled parameters were agreed upon by the Division, OSM and Seneca Coal <br />Company during meetings held in 1980 and 1981. Parameters sampled are listed in <br />the permit application Volume 2, Tab 6. The permit application states that these <br />parameters were used to, "document the physical and chemical properties of the <br />overburden and underburden, to compare these properties to ground water quality, <br />and to determine potential reclamation success." <br />Seneca lI-W Findings Documem 18 June 15, 2001 <br />Permit Renewal No. 3 <br />