>^- 467 ANNUAL FISH PASSAGE REPORT - ROCK ISLAND COLUMBIA RIVER, WASHINGTON, 1962 by Paul D. Zimmer and John H. Broughton Marine Biological Laboratory l_l BRAR Y WOODS HOLE, MASS. SPECIAL SCIENTIFIC REPORT- FISHERIES No. 467 UNITED STATES DEPAR™ENTjOJr^J>j^ FISH AND WILDLIFE SERVICE UNITED STATES DEPARTMENT OF THE INTERIOR Stewart L. Udall, Secretary James K. Carr, Under Secretary Frank P. Briggs, Assistant Secretary for Fish and Wildlife FISH AND WILDLIFE SERVICE, Clarence F. Pautzlce, Commissioner Bureau of Commercial Fisheries. Donald L. McKeman, Director ANNUAL FISH PASSAGE REPORT - ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON 1962 by Paul D. Zimmer and John H. Broughton United States Fish and Wildlife Service Special Scientific Report— Fisheries No. 467 Washington, D.C. August 1964 Rock Island Dam, Columbia River, Wash. CONTENTS Page Introduction 1 Counting procedures 2 Enumeration of fish 2 Chinook salmon, Oncorhynchus Ishawytscha 2 Chinook salmon jacks 2 Sockeye salmon, Oncorhynchus nerka (blueback or red) 2 Coho salmon, Oncorhynchus kisutch (silver) 2 Steelhead trout, Salmo gairdneri 3 Miscellaneous fish 3 Weather and river discharge data 3 Activities and observations 3 Summary 6 iii ANNUAL FISH PASSAGE REPORT - ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON, 1962 by Paul D. Zimmer, Fishery Biologist (Management) and John H. Broughton, Fishery Technician ABSTRACT Fish using the three fishways at Rock Island Dam in 1962 were counted from May 1 to October 27. Total number of salmon and steelhead trout exceeded the 1961 count by approximately 12,300 fish. The 1962 count of 34,154 chinook salmon was well above the mean of 16,178 for the 29- year period 1933-61 and exceeded the 1961 count by approximately 1,100 fish. The 29,253 sockeye salmon counted was approximately 10,000 more than re- corded in 1961 and approximately 57 percent of the 29-year mean of 51,920. The 737 coho salmon were approximately 500 more than recorded in 1947, year of previous high count, and greatly exceeded the 50 fish in 1961. The number of steelhead trout passing Rock Island Dam in 1962 was the highest recorded since counting began in 1933 and was more than twice the 29-year mean of 3,189. Fish other than salmon and steelhead trout passing through the fishways at Rock Island Dam in 1962 num- bered 164,574 and exceeded the count of salmon and steelhead trout by approxi- mately 93,000 fish. Of 71,735 salmon and steelhead trout observed at Rock Island Dam in 1962, approximately 0.5 percent had some visible evidence of injury about the head or body. INTRODUCTION Rock Island Dam is now equipped with This report on passage of fish at Rock three fishways: one located on the right bank, Island Dam during 1962 provides information another on the left bank' and the third approxi- on operation of fishways and numbers of fish mately in the center of the dam- Two of the utilizing upstream fish passage facilities. fish ladders were Placed in °Peration in 1933> and the third (middle ladder) was constructed Rock Island Dam, located on the Columbia in 1935-36. All three ladders have undergone River approximately 12 miles downstream significant modifications since initial con- from the city of Wenatchee, Wash., has been struction. in operation since 1933. The plant is owned and operated by Chelan County Public Utility Fish have been counted at Rock Island Dam District No 1 annually since 1933 — the longest continuous * record in the Columbia River. Note.--Paul D. Zimmer and John H. Broughton, , Bureau of Commercial Fisheries Columbia Fisheries Included in this report are comments cover- Program Office. U.S. Fish and Wildlife Service. mS various fishery investigations at Rock Portland, Oreg. Island Dam during 1962. COUNTING PROCEDURES Fish counting in 1962 began on May 1 and terminated on October 27. From May 1 through September 13, fish were counted 16 hours each day, starting at 5 a.m. and ending at 9 p.m. From September 14 through October 27, count- ing was reduced to conform to the hours of daylight available. Fish counters were allowed a 15- minute rest period at the end of each hour; and during all periods of noncounting, ladders were closed to passage of fish. the season, jacks rarely, if ever, exceed 22 inches in length. Consequently, jacks at Rock Island Dam are identified as all chinook salmon 18 inches or less in length prior to July 1 and 22 inches or less in length after that date. The maximum daily count of 173 jacks oc- curred on August 7 (table 3). The 7,118 fish recorded as jacks constitute 20.8 percent of the 1962 chinook salmon run as compared to 28.0 percent in 1961. Table 5 shows the number and percentage of chinook salmon jacks counted over each fish ladder. Monthly totals are given in table 2. ENUMERATION OF FISH Chinook Salmon, Oncorhynchus tshawytscha The 1962 chinook salmon count of 34,154 (jacks included) was well above the mean of 16,178 for the 29- year period 1933-61. It was also greater than the 1961 count, but only 67 percent of the record count of 50,713 in 1957 (table 1). Monthly totals of chinook salmon counted are given in table 2. Maximum day's count of chinook salmon, jacks not in- cluded, inl962 was 570 on August 10 (table 3). Tables 4 and 5 show semimonthly totals of the number and percentage of chinook salmon counted over each fish ladder. Of the chinook salmon (jacks excluded) which passed Rock Island Dam in 1962, 65.6 percent ascended the left ladder, while 13.5 and 20.9 percent as- cended the middle and right ladders, re- spectively. The count of 8 chinook salmon on May 1, 1962, is in sharp contrast to the 137 on the same date in 1961. Chinook Salmon Jacks Some chinook salmon return from the ocean as mature fish in the year following their seaward migration and are referred to as "jacks." These fish are small and predomi- nantly males. It has been determined at Rock Island Dam that up to June 30 of each year, jacks rarely, if ever, exceed 18 inches in length, while other chinook salmon are much larger. Likewise, from July 1 to the end of Sockeye Salmon, Oncorhynchus nerka (Blueback or Red) The 1962 sockeye salmon count of 29,253 was 56 percent of the 29-year mean of 51,920 (table 1). In 1962, peak of the run was reached on July 21, when 2,541 fish were counted through the fishways at Rock Island Dam. Table 6 shows semimonthly totals of the number and percentage of sockeye salmon counted over each ladder. Of the sockeye salmon passing Rock Island Dam in 1962, 48.3 percent ascended the left ladder, while 21.7 and 30.0 percent ascended the middle and right ladders, respectively. Data pertaining to sockeye salmon daily counts are in tables 9-14. Monthly totals of sockeye salmon counted in 1962 are in table 2. Coho Salmon, Oncorhynchus kisutch (Silver) The 1962 coho salmon count of 737 fish greatly exceeded the 29-year mean of 60 and the 1961 count of 50 (table 1). Additional data are shown in tables 7, 12, 13, and 14. Maxi- mum day's count of 70 fish occurred on September 27 (table 3). In 1961, maximum day's count of 8 fish occurred on October 4. The first coho salmon appearing at Rock Island Dam in 1962 was observed 14 days prior to the initial count of this species of salmon in 1961. Of the coho salmon passing the dam in 1962, 77.3 percent utilized the left ladder, while 3.9 and 18.8 percent ascended the middle and right ladders, respectively. Steelhead Trout, Salmo gairdneri The 1962 steelhead trout count of 7,591 was almost two and one-half times greater than the 29-year mean of 3,189 (table 1). The count of 15 steelhead on May 1, 1962, was slightly more than one-third the count of 44 on the same day in 1961. The greatest monthly number of steelhead passing through the fishways in 1962 occurred in September when 3,429 fish were recorded. Peak monthly movement of these fish in 1961 also occurred in September when 3,508 fish were counted. Island Dam. Species of fish included are: largescale sucker, Catostomus macrocheilus Girard: longnose sucker, Catostomus catostomus (Forster); squawfish, Ptychocheilus oregonense (Richardson); Rocky Mountain whitefish, Prosopium williamsoni (Girard); Columbia River chub, Mylocheilus caurinus (Richardson); chisel- mouth, Acrocheilus alutaceus Agassiz and Pickering; carp, Cyprinus carpio, Linnaeus; lamprey, Entosphenus tridentatus (Gairdner); shad, Alosa sapidissima (Wilson); Dolly Varden trout, Salvelinus malma (Walbaum); and rain- bow trout, Salmo gairdneri (Richardson). The number of miscellaneous species of fish pass- ing through the fishways was 2.3 times the total salmon and steelhead trout recorded. Of the steelhead passing Rock Island Dam in 1962, 70.7 percent utilized the left ladder, while 12.1 and 17.2 percent ascended the middle and right ladders, respectively. Additional data pertaining to the movement of steelhead trout at Rock Island Dam are contained in tables 8-14. Maximum day's count in 1962 was 284 on September 28 (table 3). In 1961, maximum day's count of 269 occurred on September 19. Table 8 shows semimonthly totals of the number and percentage of steelhead trout counted over each fish ladder. Miscellaneous Fish WEATHER AND RIVER DISCHARGE DATA Headwater and tailwater elevations are plotted on figures 1 and 2, respectively. Air temperatures were taken twice daily by pocket thermometer. Water temperatures were taken at the middle fish ladder by recording thermo- graph. Daily records of weather conditions and stream flows are shown on tables 9-14. Daily river discharge data are plotted on figure 3. Maximum daily discharge of 326,900 c.f.s. on June 5, 1962, was slightly less than two-thirds the flow of 488,500 c.f.s. on the same day in 1961. Maximum daily discharge of 526,900 c.f.s. in 1961 occurred on June 12. Maximum water temperature in 1962 of 65 degrees occurred on July 28 and 29. Maximum water temperature in 1961 of 67 degrees occurred on August 21. In 1962, enumeration was made of species of fish other than salmon and steelhead trout passing Rock Island Dam (tables 15-20). No claims are made as to complete accuracy of identification of these fish. It is felt, however, that the degree of accuracy is consistent with that maintained at other dams on the Columbia River and as such may be used as a rough index of abundance of these fish. In 1962, approximately 165,000 fish other than salmon and steelhead trout passed Rock ACTIVITIES AND OBSERVATIONS As in past years of counting at Rock Island Dam, some fish were observed with cuts or abrasions on the body. Of 71,735 salmon and steelhead observed as they passed over the counting boards, 364, or approximately 0.5 percent, had injuries of some sort either on the body or about the head. Of 40,764 salmon and steelhead observed in 1961, 1.0 percent had injuries about the head or body. Since in 614 613 612 611 602 | I I I I I | I I I I I | I I I I I | I I I I I | I I I I I | I I I I I | I ' I ' ' I I I I I I I I I I I I I I I I I I I I I I I I I I I S 10 IS 20 25 MAY 9 10 19 20 29 9 10 19 20 29 JUNE JULY 9 10 19 20 29 AUGUST 5 10 19 20 29 9 10 19 20 29 SEPTEMBER OCTOBER Figure 1. --Headwater elevations. Rock Island Dam, May 1 to October 27, 1962. | I I I I | Vv\ I I I I | I I I I I | I I I I I | I I I I I | I I I I I | 572 556 554 552 550 I I I I I I I I I I1 I I I I I _l I I I I I I I I I I I I I 1 1 1 1 1 1 1 1 1 1— I 1 1 1 1 1 1 1 1 1 1 5 10 15 20 25 5 10 15 20 25 5 10 15 20 25 5 10 15 20 25 5 10 15 20 25 5 10 15 20 25 MAY JUNE JULY AUGUST SEPTEMBER OCTOBER Figure 2.— Tailwater elevations, Rock Island Dam, May 1 to October 27, 1962. I I I I I I I I I I I I I I I I I I I I I I I I I I I II I I I I II I 5 10 15 20 25 MAY 5 10 15 20 25 JUNE 5 10 15 20 25 JULY 5 10 15 20 25 AUGUST 5 10 15 20 25 5 10 IS 20 25 SEPTEMBER OCTOBER Figure 3. --Daily river discharge. Rock Island Dam, May 1 to October 27. 1962. both years of observation the counters could see only the top and one side of the fish, the incidence of injury was probably greater than indicated. Percentages of in jured fish observed in the left, middle, and right ladders in 1962 were 68, 10, and 22 percent, respectively. In 1962, injuries were most numerous on large chinook and sockeye salmon (table 21). Of the 7,591 steelhead observed, only 16 fish showed evidence of injuries. Very few chinook salmon jacks displayed visible external in- juries. It is of interest to note that of 737 coho salmon examined, only 3 fish showed evidence of visible injuries. As in 1961, circular cuts or abrasions about 1 inch in diameter were more prevalent among the sockeye salmon. The most prevalent in- jury among the large chinook salmon was a deep cut along the side of the body or on the head. Some of these cuts or gashes were estimated to be as long as 6 inches and from one-quarter to one-half inch deep. Some of the injuries were newly made, as evidenced by the presence of bloody tissue. Others appeared to have been made earlier, as scar tissue had formed. In some instances, large injuries or abrasions were covered with fungus growth. The greatest number of injuries oc- curred in July and August. In the period July 17 to July 26, 1,024 sock- eye salmon were trapped in the left bank fish- way. These fish were tagged as part of a study to measure the effectiveness of the fish- ways at Rocky Reach Dam, located approxi- mately 20 miles upstream from Rock Island Dam. All tagged fish were released into the forebay of Rock Island Dam. In the period July 21 to July 26, 16 of these tagged fish were again counted through the fishways at Rock Island Dam, indicating that some of the fish proceeded downstream after release and came up through the fishways a second time. The five times that dewatering of the fish- ways at Rock Island Dam occurred in 1962 were as follows: 1. Right fish ladder, from 8:00 a.m., April 26, to 4:45 p.m., April 27, for routine maintenance work. 2. Left fish ladder, from 9:20 a.m. to 2:30 p.m., June 4, for repair of weir chains. 3. Left fish ladder, from 10:50 a.m. to 12:30 p.m., August 1, shutoff of auxiliary water to permit examination of fish ladder. 4. Right fish ladder, from 12:00 noon to 3:40 p.m., October 4, for repairs to ladder weirs. corded, representing 21 percent of that year's total of chinook salmon counted. 4. The sockeye count of 29,253, which ex- ceeded the 1961 count by approximately 10,000 fish, was approximately 22,700 less than the 29-year mean of 51,920. 5. Very few coho salmon have appeared at Rock Island Dam in the period 1933-62. The 1962 count of 737 fish was more than three times the previous high count of 229 in 1947. 6. The steelhead count of 7,591 in 1962 was almost two and one-half times greater than the 29-year mean of 3,189 and was the highest recorded in the period 1933-62. 5. Left fish ladder, October 22, closed for 50 minutes in the afternoon to permit recovery of items inadvertently dropped in fish ladder. Frequent inspections were made of fishway operations by State and Federal personnel throughout the counting season. From May 27 to 29, studies were made by fisheries person- nel and members of Chelan County Public Utility District of different spillway gate operations. 7. In 1962, a greater percentage of salmon and steelhead utilized the left bank fish ladder than used either the middle or right bank ladders. 8. Fish counting in 1962 began on May 1 and terminated October 27. From May 1 through September 13, fish were counted for 16 hours each day. From September 14 through October 27, counting was reduced to conform to the hours of daylight available. 9. In 1962 the maximum number of salmonids counted in 1 day (2,692) was on July 21. SUMMARY 1. The total Rock Island Dam count of salmon and steelhead in 1962 was 71,735, which was approximately 12,300 more than the 1961 count. 2. Annual counts of salmon and steelhead passing Rock Island Dam during the period 1933-62, inclusive, are given in table 1. 3. The chinook salmon count of 34,154 in 1962 was approximately 1,100 more than in 1961 and slightly more than one-half the peak year of 1957. In 1962, 7,118 jacks were re- 10. Season's total of fish other than salmon and steelhead trout passing Rock Island Dam in 1962 was 164,574 and was composed of the following: sucker, 100,401; squawfish, 10,944: whitefish, 38,309; chub, 10,105; carp, 1,756 shad, 1; Dolly Varden and rainbow trout, 61 and lamprey, 2,997. 11. Of 71,735 fish examined, on the top and one side only as they passed over the counting boards, approximately 0.5 percent had injuries of some type either on the body or about the head. Greatest numbers of in jured fish occurred in July and August. Injuries were most numerous on large chinook and sockeye salmon. Table 1. — Annual counts and periods of counting of salmon and steelhead trout at Rock Island Dam, 1933-62 1 [ Number of fish] Chinook Steelhead Sockeye Coho Period Year salmon trout salmon salmon Total of count 1933 5,668 1,055 40,737 182 47,642 7/21- 9/23 1934 7,H5 583 2,227 69 9,994 7/31-12/31 1935 16,305 5,418 14,013 11 35,747 1/1 -11/15 1936 7,290 2,373 16,500 0 26, 163 5/5 - 9/29 1937 5,133 2,214 15,089 58 22,494 5/11-10/16 1938 5,795 2,399 17,095 78 25, 367 4/12-10/29 1939 11,206 5,425 19,591 13 36,235 5/1 -12/9 19^40 9,512 5,220 27,093 2 41,827 3/5 -12/10 1941 2,507 3,513 963 28 7,011 4/1 -12/8 191*2 6,833 3,693 16,340 1 26,867 4/10-11/30 1943 11,129 2,315 17,522 15 30,981 4/5 -11/30 19M1 3,364 1,338 5,035 186 9,923 4/12-11/17 19^5 5,699 1,118 7,148 166 14,131 4/4 -12/17 1946 9,981 1,779 45,030 32 56,822 1/4 -11/5 19V7 11,717 1,971 79,831 229 93,748 l/l -H/27 19^ 7,083 2,360 84,184 29 93,656 l/l -11/16 1949 12,353 2,470 18,600 40 33,463 1/1 -n/15 1950 10,348 1,852 50,134 72 62,406 l/l -11/23 1951 18,752 3,121 101,826 8 123,707 l/l -11/18 1952 20,121 2,883 114,349 27 137,380 1/1 -11/18 1953 31,080 4,001 151,747 4o 186,868 1/1 -12/31 1954 33,283 5,406 91,234 44 129,967 l/l -12/31 1955 25,658 3,141 155,055 39 183,893 5/1 - 9/30 1956 25,085 1,540 92,443 29 119,097 5/1 - 9/29 1957 50,713 3,927 7l,26l 27 125,928 5/1 - 9/28 1958 32,457 3,970 98,695 60 135, 1B2 5/1 - 9/30 1959 23,352 4,138 72,351 118 99,959 5/4 - 9/30 i960 26,550 6,226 6o,34l 94 93,211 5/2 -10/29 1961 33,067 7,042 19,233 50 59,392 5/1 -10/27 1962 34,154 7,591 29,253 737 71,735 5/1 -10/27 1 Annual counts of salmon and steelhead trout given are now considered to be the official record of fish passing Rock Island Dam in period 1933-62. Table 2. — Monthly number of salmon and steelhead counted at Rock Island Dam, 1962 Species May June July August Sept. Oct. Total Chinook 5,472 2,3lB 6,576 7,392 4,709 569 27,036 Chinook (jacks) 394 589 1,600 2,980 1,454 101 7,118 Steelhead 731 58 158 1,384 3,429 1,831 7,591 Sockeye 2 50 24,762 4,143 282 14 29.253 Coho 0 0 0 l 504 232 737 Totals 6,599 3,015 33,096 15,900 10,378 2,747 71,735 Table 3. --Maximum daily counts, salmon and steelhead, Rock Island Dam, 1962 Number Species Date of fish Chinook (except jacks) Aug. 10 570 Chinook (jacks) Aug. 7 173 Steelhead Sept. 28 284 Sockeye July 21 2,541 Coho Sept. 27 70 Table A. — Number and percent of Chinook salmon counted over each fish ladder, Rock Island Dam, 1962 (jacks not included) Date Left ladder Middle ladder Right ladder Total Number Percent Number Percent Number Percent Number May 1-15 1,784 51.9 894 26.0 151 22.1 3,435 May 16-31 1,010 U9.6 432 21.2 595 29.2 2,037 June 1-15 300 1*8.2 261 42.0 61 9-8 622 June 16-30 895 52.8 368 21.7 433 25.5 1,696 July 1-15 2,512 64.7 453 H.7 920 23.6 3,885 July 16-31 1,915 71.2 266 9.9 510 18.9 2,691 Aug. 1-15 3,918 73.8 407 7.7 986 18.5 5,3H Aug. 16-31 1,715 82. k 143 6.9 223 10.7 2,081 Sept. 1-15 1,782 15.1 159 6.8 413 17.5 2,354 Sept. 16-30 1,549 65.8 203 8.6 603 25.6 2,355 Oct. 1-15 297 64.2 44 9-5 122 26.3 463 Oct. 16-27 68 64.2 16 15.1 22 20.7 106 Totals 17,745 65.6 3,646 13.5 5,645 20.9 27,036 Table 5. — Number and percent of chinook salmon jacks counted over each fish ladder, Rock Island Dam, 1962 Date Left ladder Middle ■ ladder Right ladder Total Number Percent Number Percent Number Percent Number May- 1-15 56 34.2 54 32.9 54 32.9 164 May 16-31 104 1+5.2 81 35-2 45 19.6 230 June 1-15 121 1+0.6 124 41.6 53 17.8 298 Jume 16-30 107 36.8 102 35.0 82 28.2 291 July- 1-15 125 37.1 93 27.6 119 35.3 337 July 16-31 737 58.3 213 16.9 313 24.8 1,263 Aug. 1-15 1,401 77.7 106 5.9 297 16.4 1,804 Aug. 16-31 1,0*40 88.4 68 5-8 68 5.8 1,176 Sept. 1-15 657 76.1+ 45 5-2 158 18.4 860 Sept. 16-30 430 72.4 38 6.4 126 21.2 594 Oct. 1-15 63 71.6 7 7-9 18 20.5 88 Oct. 16-27 8 61.5 1 7.7 4 30.8 13 Totals 4,849 68.1 932 13-1 1,337 18.8 7,H8 10 Table 6. --Number and percent of sockeye salmon counted over each ladder, Rock Island Dam, 1962 Date Left ladder Middle ladder Right . Ladder Total Number Percent Number Percent Number Percent Number May- 1-15 0 0 0 0 0 0 0 May 16-31 1 50.0 0 0 1 50.0 2 June 1-15 4 80.0 1 20.0 0 0 5 June 16-30 22 1+8.9 10 22.2 13 28.9 45 July 1-15 1,60k 47-3 744 21.9 1,044 30.8 3,392 July 16-31 10,018 k6.9 4,739 22.2 6,613 30.9 21, 370 Aug. 1-15 1,697 50.2 716 21.2 967 28.6 3,380 Aug. 16-31 546 71.6 104 13.6 113 14.8 763 Sept. 1-15 165 72.7 25 11.0 37 16.3 227 Sept. 16-30 44 80.0 3 5-5 8 14.5 55 Oct. 1-15 Ik 100.0 0 0 0 0 14 Oct. 16-27 0 0 0 0 0 0 0 Totals 14,115 48.3 6,342 21.7 8,796 30.0 29,253 11 Table 7. — Number and percent of coho salmon counted over each ladder, Rock Island Dam, 1962 Date Left ladder Middle ladder Right ladder Total Number Percent Number Percent Number Percent Number May 1-15 0 0 0 0 0 0 0 May 16-31 0 0 0 0 0 0 0 June 1-15 0 0 0 0 0 0 0 June 16-30 0 0 0 0 0 0 0 July 1-15 0 0 0 0 0 0 0 July 16-31 0 0 0 0 0 0 0 Aug. 1-15 0 0 0 0 0 0 0 Aug. 16-31 0 0 0 0 1 100.00 1 Sept. 1-15 28 93-3 0 0 2 6.7 30 Sept. 16-30 35^ 7^.7 22 k.6 98 20.7 klk Oct. 1-15 I69 81.2 6 2.9 33 15.9 208 Oct. 16-27 19 79-2 1 4.1 k 16.7 2k Totals 570 77.3 29 3.9 138 18.8 737 12 Table 8. — Number and percent of steelhead trout counted over each ladder, Rock Island Dam, 1962 Date Left .adder Middle ladder Right ladder Total Number Percent Number Percent Number Percent Number May 1-15 136 29.4 166 35-9 161 3^-7 U63 May 16-31 96 35.8 71 26.5 101 37.7 268 June 1-15 8 19.5 26 63. k 7 17.1 in June 16-30 12 70.6 k 23.5 1 5.9 17 July 1-15 9 6k. 3 1 7-1 It 28.6 11+ July 16-31 70 1*8.6 33 22.9 in • 28.5 ikk Aug. 1-15 361 67.7 k6 8.6 126 23.7 533 Aug. 16-31 65U 76.8 80 9.h 117 13.8 851 Sept. 1-15 79^ 76.1 81 7-8 168 16.1 1,0^3 Sept. 16-30 1,81* 77-3 213 8.9 329 13.8 2,386 Oct. 1-15 1,01+7 75-8 153 ll.l 182 13.1 1,382 Oct. 16-27 33^ Ik.h 1*2 9.h 73 16.2 1*9 Totals 5,365 70.7 916 12.1 1,310 17.2 7,591 13 cd P o cn\o -4 o\t— _ cm m cm oovo vo iaHooco OncO oo ltn H ltn H rno^Oco4 H -4 r-H vo t— H t— CM OI -4- -VO t— ITS LT\ -4 VO HrlHrlrlrlrlH CO V£> [■— t— ITN LTN OO O LTN -4 ITN rH Q H CO ON H OJ t— OO ON H v2m3VOM3MDvOVOVO ITN ir\ LTNM3 VO S-VO ON O °0 LTNVO ON ON Q HHHrHHHHHHr)HHr|rlr|r|«l&llM«alWft 0] 0) P cr) 0) OJ -p CO p 03 id cc o \D MD VO VO t— C— t— CO cOONOOOOrHCMHHHrHrHCMiHrHHrHrHr-ICMCMCM j-^tJ4-4^t-4-4-31-4-4 L7\Lr\LrNir\u^irNirNLrNir\Lr\irNirNirNLTvLrNLPvLrNirNtrNLPvLr\ *3 t— t— I^CQ t— -4-4-4-4-4 COCOOOrHHHCMOJOJOJOJOJOJOOOJOJOJOJOJOJOOOJOOOO 3r-4 irNirxirNu^uA^u^irvirNLrNi^i^LrNLfNLTNi^LrNifN^trNirNUAi^ cd i ON CD cd w > CD O o CO .o OOOOOOOHOf^HOOOOOHOHOOCVJI^-ciOooOJoOHLfNl^- M o o C •H Xi o |- 4- onoocq coroco w o t^o ir—cn ^ H -* O Hvo^o m-4- o\ o vo vo onto on h _£ CO t— ["— -4 CO VO LTNCO LTNVO -41 CO VO Oj OJ VO OJ LTN LTNCO LTN o VO O t— LTNVO t—VO -4 E H r-{ r-\ r-i r-{ -S CO 5 o H Cm CD M -P CO oooooooooooooooooooooooooooooo * ON r-l vo 0OO\-5^5 H vD POH Ono -? 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