SUMMARY OF COLUMBIA RIVER FLOOD CONTROL DATA 1 JAN 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 12053.37100.0 4979.5 1398.6 2982.0 5185.5 975.4 2015.8 CURRENT, 31 DEC. Elevation MSL 2439.0 1427.7 2411.9 1859.4 3521.2 1275.1 2072.6 1505.1 Draft KAF 3625.9 2037.4 1967.6 550.0 847.5 1156.1 63.3 1415.7 TO MEET 31 JAN F.C. Feet 0.0 0.4 9.2 15.6 0.0 0.0 0.0 0.0 Kaf 0.0 50.6 324.1 241.1 0.0 0.0 0.0 0.0 Ksfd 0.0 25.5 163.4 121.6 0.0 0.0 0.0 0.0 Cfs over inflow 0 824 5271 3922 0 0 0 0 FORECASTS, KAF Apr-Jul mp na na na na na na 3340 1594 Apr-Jul % na na na na na na 58% 59% Apr-Aug mp 10727 21457 5541 1882 na 52700 na na Apr-Aug % 93% 92% 87% 92% na 86% na na May-Sep mp na na na na 1594 na na na May-Sep % na na na na 83% na na na FLOOD CONTROL LRC,/a. Drafts, KAF Jan 31 707 2088 2292 791 244 0 0 610 623 Feb 28-9 1183 3076 2494 1152 466 0 300 480 484 Mar 15 na na 2561 na na na na na na Mar 31 1690 4164 2561 1152 711 537 200 230 231 Apr 15 1690 4164 na 1152 828 537 100 120 84 Apr 30 1690 4164 na 1152 947 613 50 na na Elevations MSL Jan 31 na 1427.3 2402.7 1843.8 3549.5 1290.0 2077.0 1564.3 1563.4 Feb 28-9 na 1418.8 2396.5 1817.7 3539.5 1290.0 2053.6 1572.6 1572.3 Mar 15 na na 2394.4 na na na na na na Mar 31 na 1408.9 2394.4 1817.7 3527.9 1283.3 2062.1 1587.5 1587.4 Apr 15 na 1408.9 na 1817.7 3522.1 1283.3 2069.9 1593.6 1595.5 Apr 30 na 1408.9 na 1817.7 3516.1 1282.3 2073.5 na na FLOOD CONTROL Drafts, KAF shifted urc's, /b. Jan 31 na na na na na 0 0 610 Feb 28-9 na na na na na 300 0 480 Mar 31 na na na na na 737 0 230 Apr 15 na na na na na 673 0 84 Elevations MSL Jan 31 na na na na na 1290.0 2077.0 1564.3 Feb 28-9 na na na na na 1286.3 2077.0 1572.6 Mar 31 na na na na na 1280.7 2077.0 1587.5 Apr 15 na na na na na 1281.5 2077.0 1595.5 SHIFT POTENTIAL,K 1/ 2/ 3/ 4/ 1/ DWR SYS F.C. MINUS LOC F.C. ie Jan 31 0 0 0 537 POTENTIAL STORAGE SHIFT TO GCL. Feb 28-9 0 0 300 2744 2/ GCL F.C. PLUS 1/. Mar 31 0 537 737 4602 3/ BRN F.C. PLUS 2/. Apr 15 36 573 673 4602 4/ MAXIMUM TOTAL THAT 2/ or 3/ Apr 30 NO SHIFT ALLOWED BY 30 APRI CAN ADD UP TO. ============================================================================================ AT THE DALLES Peak to volume unreg, Apr-Aug mp 76100 81.6% storage 445 KCFS. May-Aug mp 65208 correction Initial controlled flow- 19798 KAF (ICF) 278 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