1 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 02186699 EIGHTEENMILE CREEK ABOVE PENDLETON, SC SOURCE AGENCY USGS STATE 45 COUNTY 007 LATITUDE 343932 LONGITUDE 0824756 NAD27 DRAINAGE AREA 47.0* CONTRIBUTING DRAINAGE AREA DATUM 700. NGVD29 Date Processed: 2005-04-11 12:00 By mishealy APPROVED DD #4, , PUBLISHED Discharge, cubic feet per second WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 --- --- --- --- --- --- --- --- 51 46 41 27 2 --- --- --- --- --- --- --- --- 65 45 34 26 3 --- --- --- --- --- --- --- --- 59 45 33 35 4 --- --- --- --- --- --- --- --- 58 56 32 49 5 --- --- --- --- --- --- --- --- 95 67 31 35 6 --- --- --- --- --- --- --- --- 68 50 32 33 7 --- --- --- --- --- --- --- --- 56 47 32 33 8 --- --- --- --- --- --- --- --- 52 46 71 31 9 --- --- --- --- --- --- --- --- 56 46 44 29 10 --- --- --- --- --- --- --- --- 76 45 42 29 11 --- --- --- --- --- --- --- --- 84 42 38 29 12 --- --- --- --- --- --- --- --- 62 43 45 28 13 --- --- --- --- --- --- --- --- 57 42 42 26 14 --- --- --- --- --- --- --- --- 51 41 41 26 15 --- --- --- --- --- --- --- --- 51 42 51 27 16 --- --- --- --- --- --- --- --- 59 41 64 27 17 --- --- --- --- --- --- --- --- 52 41 43 26 18 --- --- --- --- --- --- --- --- 49 40 37 26 19 --- --- --- --- --- --- --- --- 68 39 36 26 20 --- --- --- --- --- --- --- --- 72 38 35 27 21 --- --- --- --- --- --- --- 56 57 47 33 173 22 --- --- --- --- --- --- --- 55 66 42 33 68 23 --- --- --- --- --- --- --- 54 56 44 31 44 24 --- --- --- --- --- --- --- 49 54 54 32 32 25 --- --- --- --- --- --- --- 51 59 46 30 31 26 --- --- --- --- --- --- --- 50 54 49 29 31 27 --- --- --- --- --- --- --- 49 52 45 28 31 28 --- --- --- --- --- --- --- 56 50 45 27 32 29 --- --- --- --- --- --- --- 60 49 43 27 35 30 --- --- --- --- --- --- --- 55 47 40 28 49 31 --- --- --- --- --- --- --- 52 --- 41 28 --- TOTAL --- --- --- --- --- --- --- --- 1785 1398 1150 1121 MEAN --- --- --- --- --- --- --- --- 59.5 45.1 37.1 37.4 MAX --- --- --- --- --- --- --- 95 67 71 173 MIN --- --- --- --- --- --- --- 47 38 27 26 CFSM --- --- --- --- --- --- --- --- 1.27 0.96 0.79 0.80 IN. --- --- --- --- --- --- --- --- 1.41 1.11 0.91 0.89 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 1998, BY WATER YEAR (WY) MEAN --- --- --- --- --- --- --- --- 59.5 45.1 37.1 37.4 MAX --- --- --- --- --- --- --- --- 59.5 45.1 37.1 37.4 (WY) --- --- --- --- --- --- --- --- 1998 1998 1998 1998 MIN --- --- --- --- --- --- --- --- 59.5 45.1 37.1 37.4 (WY) --- --- --- --- --- --- --- --- 1998 1998 1998 1998 1 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 02186699 EIGHTEENMILE CREEK ABOVE PENDLETON, SC SOURCE AGENCY USGS STATE 45 COUNTY 007 LATITUDE 343932 LONGITUDE 0824756 NAD27 DRAINAGE AREA 47.0* CONTRIBUTING DRAINAGE AREA DATUM 700. NGVD29 Date Processed: 2005-04-11 12:00 By mishealy APPROVED DD #4, , PUBLISHED Discharge, cubic feet per second WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 36 34 36 52 404 55 293 80 38 35 20 22 2 32 36 37 67 221 54 111 60 39 34 19 22 3 31 48 38 237 109 59 79 55 43 32 17 22 4 107 41 38 108 90 58 66 53 39 30 16 21 5 64 39 38 76 78 54 63 59 40 30 16 20 6 45 38 38 69 73 52 63 75 38 37 15 22 7 108 37 38 66 69 49 61 112 36 34 16 23 8 244 36 41 66 67 50 86 82 35 35 16 22 9 69 43 43 66 64 59 76 59 34 29 16 25 10 50 46 39 62 103 59 64 54 35 31 14 42 11 44 58 39 57 76 56 59 52 37 40 15 28 12 42 47 39 57 70 50 56 54 35 44 15 25 13 42 43 89 56 62 47 55 54 33 44 15 24 14 41 50 64 56 58 65 55 50 32 34 18 24 15 39 72 50 72 56 62 57 49 34 32 15 23 16 39 64 50 59 58 55 56 46 62 31 17 22 17 35 63 46 58 60 52 52 45 67 30 17 21 18 33 48 44 65 79 51 48 45 41 29 16 21 19 34 45 47 61 124 53 49 46 35 29 15 22 20 35 45 56 58 101 52 50 44 34 28 19 23 21 33 45 54 60 68 54 49 45 34 27 22 30 22 33 38 54 56 62 59 49 44 35 28 20 56 23 33 40 58 180 61 52 48 44 35 26 18 33 24 35 42 233 230 61 52 48 41 37 24 67 29 25 35 42 125 106 59 53 48 40 61 23 38 28 26 35 42 80 84 58 61 49 41 50 21 28 27 27 35 41 67 78 56 60 67 42 42 21 25 42 28 35 40 66 76 57 57 102 40 42 23 24 98 29 35 34 71 72 --- 56 76 39 39 21 23 58 30 36 35 59 74 --- 55 113 38 39 21 23 46 31 37 --- 55 85 --- 67 --- 38 --- 20 22 --- TOTAL 1552 1332 1832 2569 2504 1718 2148 1626 1201 923 637 921 MEAN 50.1 44.4 59.1 82.9 89.4 55.4 71.6 52.5 40.0 29.8 20.5 30.7 MAX 244 72 233 237 404 67 293 112 67 44 67 98 MIN 31 34 36 52 56 47 48 38 32 20 14 20 CFSM 1.07 0.94 1.26 1.76 1.90 1.18 1.52 1.12 0.85 0.63 0.44 0.65 IN. 1.23 1.05 1.45 2.03 1.98 1.36 1.70 1.29 0.95 0.73 0.50 0.73 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 1999, BY WATER YEAR (WY) MEAN 50.1 44.4 59.1 82.9 89.4 55.4 71.6 52.5 49.8 37.4 28.8 34.0 MAX 50.1 44.4 59.1 82.9 89.4 55.4 71.6 52.5 59.5 45.1 37.1 37.4 (WY) 1999 1999 1999 1999 1999 1999 1999 1999 1998 1998 1998 1998 MIN 50.1 44.4 59.1 82.9 89.4 55.4 71.6 52.5 40.0 29.8 20.5 30.7 (WY) 1999 1999 1999 1999 1999 1999 1999 1999 1999 1999 1999 1999 SUMMARY STATISTICS FOR 1999 WATER YEAR WATER YEARS 1998 - 1999 ANNUAL TOTAL 18963 ANNUAL MEAN 52.0 52.0 HIGHEST ANNUAL MEAN 52.0 1999 LOWEST ANNUAL MEAN 52.0 1999 HIGHEST DAILY MEAN 404 Feb 1 404 Feb 1 1999 LOWEST DAILY MEAN 14 Aug 10 14 Aug 10 1999 ANNUAL SEVEN-DAY MINIMUM 15 Aug 6 15 Aug 6 1999 MAXIMUM PEAK FLOW 679 Feb 1 679 Feb 1 1999 MAXIMUM PEAK STAGE 5.33 Feb 1 5.33 Feb 1 1999 ANNUAL RUNOFF (CFSM) 0.000 0.000 ANNUAL RUNOFF (INCHES) 0.00 0.00 10 PERCENT EXCEEDS 76 72 50 PERCENT EXCEEDS 45 45 90 PERCENT EXCEEDS 22 24 1 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 02186699 EIGHTEENMILE CREEK ABOVE PENDLETON, SC SOURCE AGENCY USGS STATE 45 COUNTY 007 LATITUDE 343932 LONGITUDE 0824756 NAD27 DRAINAGE AREA 47.0* CONTRIBUTING DRAINAGE AREA DATUM 700. NGVD29 Date Processed: 2005-04-11 12:00 By mishealy APPROVED DD #4, , PUBLISHED Discharge, cubic feet per second WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 36 24 33 37 57 42 29 40 25 23 26 27 2 34 39 34 36 53 42 48 41 25 21 26 39 3 33 34 33 36 51 42 153 41 24 19 72 49 4 142 29 34 46 50 51 115 42 25 18 44 33 5 87 27 34 46 47 52 63 41 33 17 51 32 6 47 27 e49 38 45 45 51 39 35 17 30 26 7 37 25 e43 38 44 44 46 38 27 17 26 25 8 35 24 39 37 44 46 44 36 25 16 24 24 9 36 24 37 42 43 45 42 36 24 15 23 24 10 295 25 44 211 43 43 41 35 24 15 22 24 11 307 26 44 83 43 51 40 33 23 14 24 23 12 68 27 39 52 58 56 42 34 22 15 21 22 13 54 27 62 45 59 45 49 33 21 26 20 22 14 43 27 157 41 207 43 59 32 20 33 19 21 15 36 28 72 39 85 43 113 31 22 20 19 21 16 31 28 55 38 59 126 65 30 22 18 18 20 17 22 28 50 37 52 137 53 31 29 16 18 19 18 25 28 47 41 51 67 48 32 30 15 17 21 19 23 29 45 41 50 54 45 30 25 15 17 26 20 24 30 46 46 47 625 44 29 24 15 19 23 21 28 29 63 39 45 116 44 30 26 14 35 44 22 25 27 66 38 44 63 42 30 28 14 23 36 23 24 28 47 83 43 49 41 29 24 16 21 86 24 19 29 32 75 43 42 46 29 22 25 22 36 25 20 41 32 62 43 39 68 29 20 95 23 27 26 20 64 34 53 43 36 47 29 20 33 20 35 27 21 45 34 48 48 34 41 28 20 24 20 21 28 21 36 34 47 50 34 47 27 20 23 20 18 29 21 35 34 49 42 30 43 27 32 20 19 17 30 22 34 34 67 --- 30 40 25 30 20 18 17 31 22 --- 36 70 --- 30 --- 25 --- 32 24 --- TOTAL 1658 924 1443 1661 1589 2202 1649 1012 747 681 781 858 MEAN 53.5 30.8 46.5 53.6 54.8 71.0 55.0 32.6 24.9 22.0 25.2 28.6 MAX 307 64 157 211 207 625 153 42 35 95 72 86 MIN 19 24 32 36 42 30 29 25 20 14 17 17 CFSM 1.14 0.66 0.99 1.14 1.17 1.51 1.17 0.69 0.53 0.47 0.54 0.61 IN. 1.31 0.73 1.14 1.31 1.26 1.74 1.31 0.80 0.59 0.54 0.62 0.68 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 2000, BY WATER YEAR (WY) MEAN 51.8 37.6 52.8 68.2 71.8 63.2 63.3 42.5 41.5 32.3 27.6 32.2 MAX 53.5 44.4 59.1 82.9 89.4 71.0 71.6 52.5 59.5 45.1 37.1 37.4 (WY) 2000 1999 1999 1999 1999 2000 1999 1999 1998 1998 1998 1998 MIN 50.1 30.8 46.5 53.6 54.8 55.4 55.0 32.6 24.9 22.0 20.5 28.6 (WY) 1999 2000 2000 2000 2000 1999 2000 2000 2000 2000 1999 2000 SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1998 - 2000 ANNUAL TOTAL 15205 ANNUAL MEAN 41.5 46.7 HIGHEST ANNUAL MEAN 52.0 1999 LOWEST ANNUAL MEAN 41.5 2000 HIGHEST DAILY MEAN 625 Mar 20 625 Mar 20 2000 LOWEST DAILY MEAN 14 Jul 11 14 Aug 10 1999 ANNUAL SEVEN-DAY MINIMUM 15 Jul 17 15 Jul 17 2000 MAXIMUM PEAK FLOW 1300 Mar 20 1300 Mar 20 2000 MAXIMUM PEAK STAGE 6.81 Mar 20 6.81 Mar 20 2000 ANNUAL RUNOFF (CFSM) 0.000 0.000 ANNUAL RUNOFF (INCHES) 0.00 0.00 10 PERCENT EXCEEDS 59 67 50 PERCENT EXCEEDS 34 41 90 PERCENT EXCEEDS 20 21 e Estimated 1 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 02186699 EIGHTEENMILE CREEK ABOVE PENDLETON, SC SOURCE AGENCY USGS STATE 45 COUNTY 007 LATITUDE 343932 LONGITUDE 0824756 NAD27 DRAINAGE AREA 47.0* CONTRIBUTING DRAINAGE AREA DATUM 700. NGVD29 Date Processed: 2005-04-11 12:00 By mishealy APPROVED DD #4, , PUBLISHED Discharge, cubic feet per second WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 17 18 39 32 34 47 62 35 144 23 27 e14 2 16 18 38 34 34 46 53 34 76 22 25 e18 3 17 18 37 36 33 46 54 32 37 26 23 28 4 17 18 37 37 32 99 53 31 31 35 55 159 5 17 21 36 35 32 63 53 31 29 37 34 44 6 17 19 36 36 32 51 54 32 28 26 29 24 7 18 20 36 35 31 47 52 31 28 22 26 19 8 16 24 36 51 31 47 45 31 27 22 23 16 9 16 72 36 45 31 44 44 31 34 32 23 18 10 17 72 35 39 37 43 43 30 29 25 23 21 11 17 34 34 38 32 41 42 29 28 32 22 21 12 17 29 35 50 33 65 41 28 27 29 22 18 13 17 27 33 47 34 113 41 28 26 23 197 17 14 17 28 47 42 36 60 39 26 26 22 48 17 15 17 26 41 42 34 195 42 26 26 21 20 16 16 17 26 116 41 34 120 45 25 25 20 16 14 17 16 34 271 40 48 74 40 25 24 19 15 15 18 16 30 85 52 38 51 39 26 23 19 16 15 19 17 36 68 214 36 48 38 25 22 19 15 15 20 17 41 61 189 35 138 38 28 23 28 14 18 21 18 33 55 70 35 125 37 34 22 35 13 20 22 17 32 53 49 59 74 37 37 28 24 13 17 23 17 30 48 44 48 59 37 34 34 21 13 12 24 17 30 45 41 41 53 40 28 26 26 13 48 25 18 124 42 38 65 50 40 38 24 131 e13 34 26 19 84 38 36 66 47 38 38 26 55 13 21 27 20 54 36 36 50 45 36 30 34 35 12 17 28 20 46 32 34 47 43 35 35 26 43 12 17 29 19 43 34 33 --- 132 34 41 23 42 27 15 30 18 40 30 43 --- 152 34 33 23 37 14 14 31 18 --- 31 38 --- 78 --- 28 --- 28 14 --- TOTAL 537 1127 1601 1597 1098 2296 1286 960 979 979 830 742 MEAN 17.3 37.6 51.6 51.5 39.2 74.1 42.9 31.0 32.6 31.6 26.8 24.7 MAX 20 124 271 214 66 195 62 41 144 131 197 159 MIN 16 18 30 32 31 41 34 25 22 19 12 12 CFSM 0.37 0.80 1.10 1.10 0.83 1.58 0.91 0.66 0.69 0.67 0.57 0.53 IN. 0.43 0.89 1.27 1.26 0.87 1.82 1.02 0.76 0.77 0.77 0.66 0.59 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 2001, BY WATER YEAR (WY) MEAN 40.3 37.6 52.4 62.7 61.1 66.8 56.5 38.7 39.3 32.1 27.4 30.3 MAX 53.5 44.4 59.1 82.9 89.4 74.1 71.6 52.5 59.5 45.1 37.1 37.4 (WY) 2000 1999 1999 1999 1999 2001 1999 1999 1998 1998 1998 1998 MIN 17.3 30.8 46.5 51.5 39.2 55.4 42.9 31.0 24.9 22.0 20.5 24.7 (WY) 2001 2000 2000 2001 2001 1999 2001 2001 2000 2000 1999 2001 SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1998 - 2001 ANNUAL TOTAL 14032 ANNUAL MEAN 38.4 44.0 HIGHEST ANNUAL MEAN 52.0 1999 LOWEST ANNUAL MEAN 38.4 2001 HIGHEST DAILY MEAN 271 Dec 17 625 Mar 20 2000 LOWEST DAILY MEAN 12 Aug 27 12 Aug 27 2001 ANNUAL SEVEN-DAY MINIMUM 13 Aug 22 13 Aug 22 2001 MAXIMUM PEAK FLOW 1380 Aug 13 1380 Aug 13 2001 MAXIMUM PEAK STAGE 6.96 Aug 13 6.96 Aug 13 2001 ANNUAL RUNOFF (CFSM) 0.000 0.000 ANNUAL RUNOFF (INCHES) 0.00 0.00 10 PERCENT EXCEEDS 57 66 50 PERCENT EXCEEDS 33 37 90 PERCENT EXCEEDS 17 19 e Estimated 1 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 02186699 EIGHTEENMILE CREEK ABOVE PENDLETON, SC SOURCE AGENCY USGS STATE 45 COUNTY 007 LATITUDE 343932 LONGITUDE 0824756 NAD27 DRAINAGE AREA 47.0* CONTRIBUTING DRAINAGE AREA DATUM 700. NGVD29 Date Processed: 2005-04-11 12:00 By mishealy APPROVED DD #4, , PUBLISHED Discharge, cubic feet per second WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 15 21 26 37 47 33 81 58 25 20 5.7 24 2 16 22 26 37 44 81 61 39 23 e18 e5.1 22 3 16 17 25 38 43 94 50 32 22 16 6.6 20 4 16 20 24 33 41 52 45 165 21 20 5.3 19 5 16 20 25 29 38 48 44 68 89 15 4.2 17 6 22 20 25 46 55 47 43 40 41 14 4.2 16 7 19 21 25 41 132 46 42 36 29 12 4.1 13 8 16 23 26 33 134 42 41 38 24 11 3.3 14 9 15 23 27 31 72 41 43 37 21 10 3.4 12 10 16 21 41 31 49 34 45 35 20 13 3.9 11 11 17 17 63 30 45 33 43 34 19 17 3.9 10 12 18 21 37 26 58 70 42 32 20 16 3.4 8.7 13 20 21 35 22 76 200 46 64 21 18 3.9 18 14 19 23 35 29 54 81 46 52 19 21 3.4 87 15 21 23 35 29 39 61 44 33 20 21 3.5 393 16 20 24 33 29 39 58 41 31 19 19 77 163 17 19 25 42 29 38 57 39 30 19 15 45 46 18 21 21 67 30 34 51 41 38 18 11 28 38 19 21 19 41 123 31 47 40 26 18 9.8 24 38 20 23 13 37 162 36 50 38 28 16 8.5 15 29 21 23 17 36 77 39 80 36 27 14 8.5 11 43 22 21 16 36 62 34 60 34 27 14 8.4 8.2 49 23 20 14 39 111 34 49 33 26 16 8.2 8.7 33 24 20 27 48 132 27 47 33 25 18 14 9.7 26 25 25 e24 40 302 32 52 40 24 21 13 25 32 26 21 24 39 97 33 53 34 23 24 13 42 73 27 14 24 38 60 32 57 32 24 34 9.8 55 74 28 12 24 38 56 32 47 31 24 25 8.8 23 52 29 19 24 37 53 --- 45 29 22 18 7.5 19 40 30 19 25 37 50 --- 124 26 23 16 6.4 22 35 31 20 --- 37 48 --- 219 --- 26 --- 5.3 27 --- TOTAL 580 634 1120 1913 1368 2059 1243 1187 704 408.2 503.5 1455.7 MEAN 18.7 21.1 36.1 61.7 48.9 66.4 41.4 38.3 23.5 13.2 16.2 48.5 MAX 25 27 67 302 134 219 81 165 89 21 77 393 MIN 12 13 24 22 27 33 26 22 14 5.3 3.3 8.7 CFSM 0.40 0.45 0.77 1.31 1.04 1.41 0.88 0.81 0.50 0.28 0.35 1.03 IN. 0.46 0.50 0.89 1.51 1.08 1.63 0.98 0.94 0.56 0.32 0.40 1.15 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 2002, BY WATER YEAR (WY) MEAN 34.9 33.5 48.4 62.4 58.0 66.7 52.7 38.6 36.1 28.3 25.2 34.0 MAX 53.5 44.4 59.1 82.9 89.4 74.1 71.6 52.5 59.5 45.1 37.1 48.5 (WY) 2000 1999 1999 1999 1999 2001 1999 1999 1998 1998 1998 2002 MIN 17.3 21.1 36.1 51.5 39.2 55.4 41.4 31.0 23.5 13.2 16.2 24.7 (WY) 2001 2002 2002 2001 2001 1999 2002 2001 2002 2002 2002 2001 SUMMARY STATISTICS FOR 2001 CALENDAR YEAR FOR 2002 WATER YEAR WATER YEARS 1998 - 2002 ANNUAL TOTAL 13101 13175.4 ANNUAL MEAN 35.9 36.1 42.0 HIGHEST ANNUAL MEAN 52.0 1999 LOWEST ANNUAL MEAN 36.1 2002 HIGHEST DAILY MEAN 214 Jan 19 393 Sep 15 625 Mar 20 2000 LOWEST DAILY MEAN 12 Aug 27 3.3 Aug 8 3.3 Aug 8 2002 ANNUAL SEVEN-DAY MINIMUM 13 Aug 22 3.6 Aug 8 3.6 Aug 8 2002 MAXIMUM PEAK FLOW 738 Sep 15 1380 Aug 13 2001 MAXIMUM PEAK STAGE 5.56 Sep 15 6.96 Aug 13 2001 ANNUAL RUNOFF (CFSM) 0.000 0.000 0.000 ANNUAL RUNOFF (INCHES) 0.00 0.00 0.00 10 PERCENT EXCEEDS 53 60 66 50 PERCENT EXCEEDS 31 27 35 90 PERCENT EXCEEDS 16 12 17 e Estimated 1 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 02186699 EIGHTEENMILE CREEK ABOVE PENDLETON, SC SOURCE AGENCY USGS STATE 45 COUNTY 007 LATITUDE 343932 LONGITUDE 0824756 NAD27 DRAINAGE AREA 47.0* CONTRIBUTING DRAINAGE AREA DATUM 700. NGVD29 Date Processed: 2005-04-11 12:00 By mishealy APPROVED DD #4, , PUBLISHED Discharge, cubic feet per second WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 31 31 42 85 54 121 68 80 e66 e170 101 e65 2 28 29 42 64 52 105 66 78 66 e700 e120 e63 3 25 29 42 79 51 95 65 76 137 e186 e100 e61 4 24 30 49 58 68 77 64 e76 127 e100 e84 e60 5 24 66 391 55 57 73 e70 111 84 e95 e84 e60 6 23 154 123 52 57 456 85 281 77 e90 e64 e59 7 22 60 85 45 103 155 157 236 114 91 93 58 8 20 48 72 47 69 105 122 136 e97 90 70 55 9 19 45 65 49 61 81 127 112 79 79 62 54 10 22 45 83 48 70 72 179 e98 73 77 e74 49 11 22 122 397 44 59 66 136 93 72 85 71 45 12 21 116 124 e42 58 63 e110 87 76 e90 67 45 13 35 84 327 42 58 61 103 81 113 e85 67 45 14 34 63 198 43 60 60 93 80 e82 113 64 47 15 238 56 101 43 65 68 87 83 e81 96 63 50 16 611 155 80 44 146 89 87 81 e80 83 e90 46 17 102 144 70 46 166 73 85 134 86 77 e88 45 18 60 81 64 e47 96 81 101 e95 172 e70 87 44 19 e50 68 63 e47 82 190 e85 94 2040 e70 92 43 20 e42 65 278 45 76 2980 e80 89 202 e70 71 44 21 30 64 101 44 72 483 97 103 125 70 68 45 22 26 58 74 47 417 154 111 1330 e104 85 79 97 23 23 53 54 43 175 e120 80 448 83 103 e85 191 24 23 51 542 41 106 e100 76 184 76 80 e65 59 25 22 49 193 44 89 e87 87 e140 72 75 59 50 26 25 48 98 45 89 e86 e92 101 69 e68 58 51 27 22 46 75 44 483 e85 72 89 68 e66 58 51 28 28 46 55 44 216 84 75 82 69 69 57 91 29 52 45 59 54 --- e81 76 76 e69 75 58 51 30 46 45 57 98 --- e87 102 74 e68 88 57 47 31 36 --- 56 64 --- 74 --- 74 --- 131 e70 --- TOTAL 1786 1996 4060 1593 3155 6512 2838 4902 4727 3427 2326 1771 MEAN 57.6 66.5 131 51.4 113 210 94.6 158 158 111 75.0 59.0 MAX 611 155 542 98 483 2980 179 1330 2040 700 120 191 MIN 19 29 42 41 51 60 64 74 66 66 57 43 CFSM 1.23 1.42 2.79 1.09 2.40 4.47 2.01 3.36 3.35 2.35 1.60 1.26 IN. 1.41 1.58 3.21 1.26 2.50 5.15 2.25 3.88 3.74 2.71 1.84 1.40 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 2003, BY WATER YEAR (WY) MEAN 39.4 40.1 64.9 60.2 68.9 95.4 61.1 62.5 56.4 42.0 33.5 38.2 MAX 57.6 66.5 131 82.9 113 210 94.6 158 158 111 75.0 59.0 (WY) 2003 2003 2003 1999 2003 2003 2003 2003 2003 2003 2003 2003 MIN 17.3 21.1 36.1 51.4 39.2 55.4 41.4 31.0 23.5 13.2 16.2 24.7 (WY) 2001 2002 2002 2003 2001 1999 2002 2001 2002 2002 2002 2001 SUMMARY STATISTICS FOR 2002 CALENDAR YEAR FOR 2003 WATER YEAR WATER YEARS 1998 - 2003 ANNUAL TOTAL 18683.4 39093 ANNUAL MEAN 51.2 107 55.0 HIGHEST ANNUAL MEAN 107 2003 LOWEST ANNUAL MEAN 36.1 2002 HIGHEST DAILY MEAN 611 Oct 16 2980 Mar 20 2980 Mar 20 2003 LOWEST DAILY MEAN 3.3 Aug 8 19 Oct 9 3.3 Aug 8 2002 ANNUAL SEVEN-DAY MINIMUM 3.6 Aug 8 21 Oct 6 3.6 Aug 8 2002 MAXIMUM PEAK FLOW 3470 Mar 20 3470 Mar 20 2003 MAXIMUM PEAK STAGE 10.68 Mar 20 10.68 Mar 20 2003 ANNUAL RUNOFF (CFSM) 1.09 2.28 1.17 ANNUAL RUNOFF (INCHES) 14.79 30.94 15.91 10 PERCENT EXCEEDS 88 149 87 50 PERCENT EXCEEDS 35 73 39 90 PERCENT EXCEEDS 12 43 18 e Estimated 1 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 02186699 EIGHTEENMILE CREEK ABOVE PENDLETON, SC SOURCE AGENCY USGS STATE 45 COUNTY 007 LATITUDE 343932 LONGITUDE 0824756 NAD27 DRAINAGE AREA 47.0* CONTRIBUTING DRAINAGE AREA DATUM 700. NGVD29 Date Processed: 2005-04-11 12:00 By mishealy APPROVED DD #4, , PUBLISHED Discharge, cubic feet per second WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 46 e57 56 46 59 55 60 47 36 98 e51 22 2 47 e55 52 48 61 59 57 57 30 69 52 96 3 49 53 53 48 105 61 55 51 29 165 59 47 4 e49 53 64 44 70 59 52 38 35 71 47 28 5 e47 56 72 57 65 58 48 39 38 e75 44 25 6 47 74 60 61 469 62 48 41 34 e51 44 25 7 49 63 59 47 247 59 49 39 30 46 41 733 8 91 e58 59 48 93 54 50 37 43 43 40 2280 9 84 e55 60 53 79 53 50 41 45 69 40 220 10 60 52 219 52 70 54 49 38 37 44 40 95 11 59 52 157 49 62 55 50 36 32 42 39 67 12 e58 53 91 48 94 58 52 39 30 55 124 e58 13 57 53 74 46 76 58 90 47 32 74 71 50 14 58 53 171 45 71 55 59 43 46 66 42 47 15 57 e53 88 47 103 56 44 38 71 39 36 43 16 56 e53 63 48 100 61 42 35 e65 39 34 44 17 56 61 72 49 74 59 47 33 e42 39 33 389 18 57 59 58 56 75 58 41 31 e42 62 49 109 19 58 337 54 53 72 56 41 37 38 52 31 72 20 57 121 53 50 66 54 37 36 34 40 28 60 21 58 91 49 49 65 60 37 31 37 38 31 54 22 57 76 50 48 62 49 36 30 39 38 29 50 23 58 56 52 50 61 48 35 30 51 38 31 46 24 58 66 57 52 63 50 35 29 67 36 28 44 25 e58 64 50 71 63 52 35 27 60 52 29 42 26 e60 58 48 73 65 53 36 e26 186 40 27 27 27 126 e58 47 61 69 50 37 e26 51 104 25 90 28 66 e77 48 63 63 49 33 25 46 204 23 663 29 65 70 47 60 55 49 33 25 42 72 23 109 30 61 56 52 63 --- 65 36 67 129 e57 27 72 31 61 --- 47 62 --- 71 --- 55 --- e66 24 --- TOTAL 1870 2143 2182 1647 2677 1740 1374 1174 1497 1984 1242 5707 MEAN 60.3 71.4 70.4 53.1 92.3 56.1 45.8 37.9 49.9 64.0 40.1 190 MAX 126 337 219 73 469 71 90 67 186 204 124 2280 MIN 46 52 47 44 55 48 33 25 29 36 23 22 CFSM 1.28 1.52 1.50 1.13 1.96 1.19 0.97 0.81 1.06 1.36 0.85 4.05 IN. 1.48 1.70 1.73 1.30 2.12 1.38 1.09 0.93 1.18 1.57 0.98 4.52 STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 2004, BY WATER YEAR (WY) MEAN 42.9 45.3 65.8 59.0 72.9 88.9 58.5 58.4 55.4 45.2 34.4 59.9 MAX 60.3 71.4 131 82.9 113 210 94.6 158 158 111 75.0 190 (WY) 2004 2004 2003 1999 2003 2003 2003 2003 2003 2003 2003 2004 MIN 17.3 21.1 36.1 51.4 39.2 55.4 41.4 31.0 23.5 13.2 16.2 24.7 (WY) 2001 2002 2002 2003 2001 1999 2002 2001 2002 2002 2002 2001 SUMMARY STATISTICS FOR 2003 CALENDAR YEAR FOR 2004 WATER YEAR WATER YEARS 1998 - 2004 ANNUAL TOTAL 37446 25237 ANNUAL MEAN 103 69.0 57.3 HIGHEST ANNUAL MEAN 107 2003 LOWEST ANNUAL MEAN 36.1 2002 HIGHEST DAILY MEAN 2980 Mar 20 2280 Sep 8 2980 Mar 20 2003 LOWEST DAILY MEAN 41 Jan 24 22 Sep 1 3.3 Aug 8 2002 ANNUAL SEVEN-DAY MINIMUM 43 Jan 11 24 Aug 26 3.6 Aug 8 2002 MAXIMUM PEAK FLOW 2770 Sep 8 3470 Mar 20 2003 MAXIMUM PEAK STAGE 9.58 Sep 8 10.68 Mar 20 2003 ANNUAL RUNOFF (CFSM) 2.18 1.47 1.22 ANNUAL RUNOFF (INCHES) 29.64 19.97 16.58 10 PERCENT EXCEEDS 129 80 87 50 PERCENT EXCEEDS 70 53 42 90 PERCENT EXCEEDS 47 33 19 e Estimated