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32. 1997 Economic Census





963. Electric Utility Industry -- Capability, Peak Load, and Capacity Margin

[Excludes Alaska and Hawaii. Capability represents the maximum kilowatt output with all power sources available and with hydraulic equipment under actual water conditions, allowing for maintenance, emergency outages, and system operating requirements. Capacity margin is the difference between capability and peak load]

 
Capability at the time of- Non-coincident Capacity margin
peak load
Year Summer peak load (1,000 kW) Winter peak load (1,000 kW) Summer Winter
(1,000 kW) (1,000 kW)
Change from Change from Amount Percent of Amount Percent of
Amount prior year Amount prior year Summer Winter (1,000 kW) capability (1,000 kW) capability
 
1970 326,900 26,600 339,050 27,600 274,650 248,550 52,250 16.0 90,500 26.7
1971 353,250 26,350 366,700 27,650 292,100 261,650 61,150 17.3 105,050 28.6
1972 381,700 28,450 394,050 27,350 319,150 290,950 62,550 16.4 103,100 26.2
1973 415,500 33,800 433,150 39,100 343,900 295,150 71,600 17.2 138,050 31.9
1974 444,400 28,900 467,400 34,250 349,250 302,500 95,150 21.4 164,900 35.3
1975 479,300 34,900 492,450 25,050 356,800 331,100 122,500 25.6 161,350 32.8
1976 498,750 19,450 511,000 18,550 370,900 349,850 127,850 25.6 161,150 31.5
1977 516,000 17,250 537,600 26,600 396,350 360,200 119,650 23.2 177,400 33.0
1978 545,700 29,700 561,550 23,950 408,050 383,100 137,650 25.2 178,450 31.8
1979 2 544,506 (X) 554,525 (X) 398,424 368,876 146,082 26.8 185,649 33.5
1980 558,237 13,731 572,195 17,670 427,058 384,567 131,179 23.5 187,628 32.8
1981 572,219 13,982 586,569 14,374 429,349 397,800 142,870 25.0 188,769 32.2
1982 586,142 13,923 598,066 11,497 415,618 373,985 170,524 29.1 224,081 37.5
1983 596,449 10,307 612,453 14,387 447,526 410,779 148,923 25.0 201,674 32.9
1984 604,240 7,791 622,125 9,672 451,150 436,374 153,090 25.3 185,751 29.9
1985 621,597 17,357 636,475 14,350 460,503 423,660 161,094 25.9 212,815 33.4
1986 633,291 11,694 646,721 10,246 476,320 422,857 156,971 24.8 223,864 34.6
1987 648,118 14,827 662,977 16,256 496,185 448,277 151,933 23.4 214,700 32.4
1988 661,580 13,462 676,940 13,963 529,460 466,533 132,120 20.0 210,407 31.1
1989 673,316 11,736 685,249 8,309 523,432 496,378 149,884 22.3 188,871 27.6
1990 685,091 11,775 696,757 11,508 545,537 484,014 139,554 20.4 212,743 30.5
1991 690,915 5,824 __________ 703,212 6,455 __________ 551,320 485,435 139,595 20.2 217,777 31.0
1992 695,436 4,521 __________ 707,752 4,540 __________ 548,707 492,983 146,729 21.1 214,769 30.3
1993 694,250 1,186 711,957 4,205 575,356 521,733 118,894 17.1 190,224 26.7
1994 702,985 8,735 715,090 3,133 585,320 518,253 117,665 16.7 196,837 27.5
1995 714,222 11,237 727,679 12,589 620,249 544,684 93,973 13.2 182,995 25.1
1996 723,571 9,349 740,526 12,847 615,529 545,061 108,042 14.9 195,465 26.4
1997 729,079 5,508 743,774 3,248 631,355 560,228 97,724 13.4 183,546 24.7
1998 727,242 -1,837 742,391 -1,383 648,694 573,107 78,548 10.8 169,284 22.8


X Not applicable. NA Not available.
1 Prior to 1973, data was for the month of December.
2 Beginning 1979, data are not entirely comparable with prior years due to change in data source.

Source: Edison Electric Institute, Washington, DC, Statistical Yearbook of the Electric Utility Industry, annual. http://www.eei.org/issues/finan/



https://allcountries.org/uscensus/963_electric_utility_industry_capability_peak_load.html

These tables are based on figures supplied by the United States Census Bureau, U.S. Department of Commerce and are subject to revision by the Census Bureau.

Copyright © 2006 Photius Coutsoukis and Information Technology Associates, all rights reserved.