2004-11-09_REVISION - M2000016 (6)

Home Browse Search

Seni ay: APPLEGATE GRDUP, INC.; 3G3a5266tt; tt~~~~ ~ ~~ _:1 JFFICE OF THE STATE ENGINEER .._ Givision of b1'ater Resa.n cos Dewar;men: „I natural Resources t +t'S <_nermat Stre«I, Room 913 Dcmcr, Colorado 8u111J P1one: t!U!t t16h-3 ~B1 Pax~r303'~96u-35x9 ht[p 7,icdlCt ,le:e r u.u5; ~JefdUh i1Un Mr. Richard T. Raines Tuttfe Applegate, Inc. 11990 Grant Street, Sulte 304 Denver, Colorado 80223 STATE OF COLORADO April 2, 2001 Re: Fort Lupton Gravel Pit, Substitute Water Supply Plan DMG File No. M-85-088 NE'/. NWY< Section 12, T1 N, R67W, 6th P M. Water Division 1, Water District 2 Deaf Mr. Raines: ~~~1~ r 1., ~`(~~b` ~, r_»i.7 \e~a~~ BI:I rT.em Gceernor liter, E. +n'.urLvr Esecutioe OrrW'loi flat D Sim pscn P E. Swlc rngmcer This letter is in response to your application of August 29, 2000 and amendment dated tvlarch 2. 2001 requesting a substitute water supply plan for a sand and gravel pit to be operated by Western Mobile, Inc., a subsidiary of Lafarge Corporation ('Lafarge), in accordance with 37-80- 120 C.R.S. The required fee of 51.343 for the substitute water supply plan has been oaid. - This pit was previously operated by another entity wit`tout a substitute water supply plan. This previous operator exposed 4.0 acres of groundwater as part of the aggregate operation. Lafarge recently purchased the site and is in the process of securing adjacent property for future mining operations. According to information submitted, no ;3roundwater was exposed prior to January 1, 1981. Current plans include wet mining of the sits during 2()01. The Applicants shall be responsible for compliance with this plan, but the State Engineer's Once may also pursue the landowner, for eventual compliance. You estimate the annual depletion to the South Platte River due to operation Df the Fort Lupton Pit :o be 34.9 acre-feet per year. This total includes: 26.6 acre-feet of evaporative losses from approximately 9.0 acres of exposed groundwater, 1.0 acre-feet of water lost with dust suppression and 7.4 acre-feet of water lost with the mined ;product. Anon-tributary Arapahoe aquifer well along P1wn Creek near Sedalia, Colorado Iappr~ximately °i0 miles upstream ofi the pit) will be used to replace depletions. Transit losses have been estimated assuming a 0.25 percent loss per mile or about 4.4 acre-feet. Total replacerr_nt water required from the well is 39.3 acre-feet per year. The Fort Lupton P;t is located approximately 4,000 feet from the South Platte River. The Applicant has provided a monthly schedule of lagged depletions to the river system, together with a <_chedule of replacement requirements totaling 39.3 acre-toot. These replacement amounts represent the distribution of lagged depletions after ten years plus the difference between the actual depletion at the pit and the lagged depletion pro-rated over the year. The resulting replacement schedule returns the full depletion amount to the South Platte River on an annual basis.