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Mr. Steve Witte, PE, Division Engineer, Water Division 2 3/12/2007 <br />Administrative Approval for Proposed Wash Water Usage E&C Services Project # 06-153 <br />Pine Ridge Pit (I.eadville) -ACA Products, Inc. <br />Table 1 USGS 07083000 Mean Daily Discharge for 1945 - 2006 <br />00060, Discharge, cubic feet per second, <br />Day Mean of daily mean values for each day for 60 - 61 years of record in, cts (Calculation Period <br />of 194510-O1-> 2006-09-30) <br />mon <br />th <br />~ Jan ~ Feb ~ Mar rApr May Jun Jul Aug I Sep (Oct Nov Dec <br />rl 4.3 3.8 3.7r 4,1~ 13 ~ 51 22 14r 8.9~ 5.6 <br />~2 ~.2 3.8 ~ 3.7 4.2 ~ 1S 49 22 ~ 13 8.9 S.6 <br />3 ~ 4.23.7 3.7 4.2 17 48 21 ]3 8.8r 5.6 <br />4.2 3.7 3.6 4.3 19 46 20 13 8.8 5.5 <br />r 5 4.2 3.7 ~ 3.7 4.3 21 4S 20. 13 8.7 ~ S.S <br />6 4.2 3.7 3.7 4.4 23 r 44 20. 13 8.6 ~S.S <br />4.2 3.7 3.7 4.S 24 42 20. 13 8.5 S.S <br />~8 4.2 3.7 3.7 4.7 26 - 40. 20. 12 8.4 5.4 <br />l y l 4.2 3.7 3.7 4.8 26 + 38 20. 12 8.1 5.4 <br />10 ~ 4.2 3.7 3.7 4.9 27 ~ 37 20. 12 8.2 S.3 <br />11 4.2 3.7 3.7 5.1 28 ~ z 37 19 12 8.1 5.2 <br />12 4.2 3.7 3.7 5.2 ~ 29 '>. _ 36 20. 12 8.0 5.1 <br />13 4.2 3.7 3.7 S.3 32 35 19 11 8.0 5.1 <br />14 4.2 3.7 3.7 S.7 35 33 19 11 ~ 7.9 S.1 <br />r15 ~ 4.2~3.8~ 3.7~ 5.9~ 37s ~-,~ j 32~ 18~ 11~5~ S.0 <br />16 4.1 3.8 3.7 ~ 6.2 41 77 31 18 11 7.4 S.0 <br />17 4.1 3.8 3.7 6.6 ~ 44 75 30. 17 11 7.4 S.0 <br />18 4.1 ~ 3.8 3.7 7.0 47 > 72 30. 17 11 7.3 4.9 <br />19 4.1 3.7 3.8 7.2 S0. 70. 31 17 11 7.2 5.0 <br />20 4.0 3.8 ~~3.8 7.5 55 68 31 17 11 7.2 4.9 <br />21 4.0 3.8 3.8 8.0 59 ~ 66 31 16 11 ~7.1 4.9 <br />22 4.0 3.8 3.9 r 8.6 ~ 63 63 30. 16 10. 7.0 4.9 <br />23 4.0 3.8 3.8 8.9 67 ; n •; 62 29 15 10. 6.8 4.8 <br />24 ~4.0 3.8 3.8 9.7 71 ,; ~ 60. 29 15 ~ 10. 6.6 ~ 4.8 <br />25 3.9 3.8 3.9 10. 73 S9 28 15 ]0. r 6.6 4.8 <br />26 3.9 3.8 3.9~10.~ 75 S8~ 28 IS 10. 6.5 4.8 <br />~7 ! 4.0 3.7 3.8 11 79 r 57 27 14 10. ~ 6.3 r 4.7 <br />(28 ~ 3.9~.7~ 3.811 83 _, -~ 54 26 14~ 9.6 6.3 4.7 <br />29 ~ 3.9 3.6 ~ 3.8 I I SS "K'- 3' S3 25 14 9.3 6.2 ~4.6 <br />30 3.9 ~ J 3.9 12 86.~~'~. 51 ~ 24 14 9.2 ~ 6.2 4.6 <br />31 3.9~- 3.9~ r 88~- 52~ 23~ I 9.2~-~4.6 <br />Page 3 of 4 <br />P ro Fassionai ~Bnginaaring and Construction Services, LLC <br />702 Gregg Drive PO Box 5073 Buena Vista. CO 81211 <br />p. (7i9) 395-8270 froaLOffice a~pecserv.com f. (719) 395-8103 <br />25 <br />