R2000-175 AMENDING COUNTY OF MACON EMERGENCY OPERATIONS PLAN

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. , 10. Factors such as weather outside environment chemical reactions and � • , , , I ongoing terrorist activity can alter the comple�city of the incident at any '�, time. An incident that is affecring only one jurisdiction may change , suddenly and effect several jurisdictions. For this reason, once an incident has been confumed, atl jurisdicrions that might be affected will be notified and kept informed of the evolving situation. 11. Biological events may not be recognized for days unril widespread symptoms occur and are recognized by the hospitaUpublic health system. III. Planning Factors A. Geogxaphy l. Macon County, Illinois is an agricultural county with a large, centrally- located industry base and has a variety of communities dispersed throughout the azea. The topography is generally flat to gently rolling. Temperature extremes are from—22 degrees F in the winter to 106 degees F in the summer,with averages of 25 degrees in the winter and 71 degees in the sununer. The popularion is 117,206(1990 Census), with the county seat in Decatur. The county is geographically situated in Central Illinois with Sangamon County to the west, Dewitt and Logan Counties to the north,Piatt County to the east, and Shelby, Moultrie, and Christian Counties to the South. There are 12 villages and ciries, 17 townships range in population from650 upwards to 84,000. The 572 square miles of land is at an average altitude of 615 feet with the • Sangamon River flowing through the county from east to west. B. Climate The climate of Macon County is generally temperate. All four seasons are experienced,with teinperature extremes during the year from below zero in the winter to highs in the 90's to over 100 in the suxruner. The county is ranked si�cth in the state with documented tornado touchdowns since records have been kept. The county is subject to rainfall averaging 37 inches per year but has experienced droughts, the most severe being in 1988. Winter storms occur, including ice storms, heavy snows,whiteouts,periods of extreme cold, and blizzards, causing hazazdous road conditions. There is an average of 26 inches of snowfall each year. Wind is from the southwest 55%of the time. During the winter inonths,the wind ma.inly blows from the northwest. C. Water Supplies Lake Decatur supplies water for Decatur and Mt. Zion. The smaller incorporated communities have wells with water towers holding their daily water supply. Most non-incorporated azeas obtain water from private wells. A large well-field located in southeaster Dewitt County provides Decatur with emergency backup water supply. • Annex V:Tecrorism:Consequence Management Pian -3-