SUMMARY OF COLUMBIA RIVER FLOOD CONTROL DATA 1 FEB 1998 MCDB ARDB LIB DCDB HGH GCL BRN DWR DWR PROJECT LIMITS Maximum El. MSL 2475.0 1444.0 2459.0 1892.0 3560.0 1290.0 2077.0 1600.0 Minimum El. MSL 2320.0 1378.0 2287.0 1794.2 3336.0 1208.0 1976.0 1445.0 Usable stor.KAF 12053.3 7100.0 4979.5 1398.6 2982.0 5185.5 975.4 2015.8 Usable stor.KSFD 6076.9 3579.6 2510.5 705.0 1503.4 2614.4 491.7 1016.4 CURRENT, 31 JAN. Elevation MSL 2418.6 1423.3 2403.3 1830.4 3515.4 1267.5 2068.1 1512.5 Draft KAF 5525.9 2553.6 2273.0 984.4 959.4 1706.5 124.4 1326.1 TO MEET 28-9 FEB F.C. Feet 2418.6 10.1 10.9 22.7 0.0 0.0 23.6 0.0 Kaf 0.0 1146.4 351.0 285.6 0.0 0.0 275.6 0.0 Ksfd 0.0 578.0 177.0 144.0 0.0 0.0 139.0 0.0 Cfs over inflow 0 20643 6320 5143 0 0 4963 0 FORECASTS, KAF Apr-Jul mp na na na na na na 5080 1952 Apr-Jul % na na na na na na 88% 72% Apr-Jul change na na na na na na 1740 358 Apr-Aug mp 10588 22195 5639 2029 na 55400 na na Apr-Aug % 92% 95% 88% 99% na 91% na na Apr-Aug change -139 738 99 147 na 2700 na na May-Sep mp na na na na 1654 na na na May-Sep % na na na na 87% na na na May-Sep change na na na na 60 na na na FLOOD CONTROL LRC,/a. Drafts, KAF Feb 28-9 1440 3700 2624 1270 490 0 400 674 695 Mar 15 na na 2709 na na na na na na Mar 31 2080 5100 2709 1270 748 537 450 503 480 Apr 15 2080 5100 na 1270 872 1152 500 446 299 Apr 30 2080 5100 na 1270 997 2328 500 na na Elevations MSL Feb 28-9 na 1413.2 2392.3 1807.7 3538.4 1290.0 2044.5 1560.0 1558.6 Mar 15 na na 2389.5 na na na na na na Mar 31 na 1399.9 2389.5 1807.7 3526.1 1283.3 2039.6 1571.2 1572.6 Apr 15 na 1399.9 na 1807.7 3519.9 1275.2 2034.6 1574.7 1583.5 Apr 30 na 1399.9 na 1807.7 3513.5 1258.6 2034.6 na na FLOOD CONTROL Drafts, KAF shifted urc's, /b. Feb 28-9 na na na na na 400 0 674 Mar 31 na na na na na 1010 0 480 Apr 15 na na na na na 1799 0 299 Elevations MSL Feb 28-9 na na na na na 1285.0 2077.0 1560.0 Mar 31 na na na na na 1277.1 2077.0 1572.6 Apr 15 na na na na na 1266.2 2077.0 1583.5 SHIFT POTENTIAL,KA 1/ 2/ 3/ 4/ 1/ DWR SYS F.C. MINUS LOC F.C. ie POTENTIAL STORAGE SHIFT TO GCL. Feb 28-9 0 0 400 2744 2/ GCL F.C. PLUS 1/. Mar 31 23 560 1010 4602 3/ BRN F.C. PLUS 2/. Apr 15 147 1299 1799 4602 4/ MAXIMUM TOTAL THAT 2/ or 3/ Apr 30 NO SHIFT ALLOWED BY 30 APRIL CAN ADD UP TO. ============================================================================================ AT THE DALLES Peak to volume unreg, Apr-Aug mp 83300 89.3% storage 499 KCFS. Apr-Aug change 7200 correction Initial controlled flow- May-Aug mp 71377 22001 KAF (ICF) 308 KCFS ============================================================================================ /a. LRC is DWORSHAK LOCAL RULE CURVE. /b. Under certain conditions, the GCL, BRN and DWR rule curves may be "shifted". The rule curves shown are the "maximun" allowable. All or part of the "max" volume may be "shifted". DWR has priority over BRN if all volume can't be shifted. "shifts" will be determined on a case by case basis, from year to year, and month to month. Questions? Russ Morrow, 503-808-3951 or Bruce Glabau, 503-808-3950