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Hydrant Winterizing 160 FTE labor hours required, 2 FTEs required, high priority. <br />Red top hydrants (43 hydrants citywide) have a plug at the elbow, below grade. The reason for the plug <br />is normally because of a high level of ground water in that area. If a plugged hydrant is not checked, <br />there is a possibility that the barrel will remain wet, not drain properly and could freeze during the <br />winter months. A frozen hydrant barrel can cause damage to the hydrant, making it inoperable for use <br />in the winter months. <br />Green top hydrants (40 hydrants citywide) are similar to red top hydrants as it is also necessary to check <br />for ground water in the hydrant barrel of those hydrants. Green top hydrants are not plugged; instead, <br />the ground water seeps into the barrel and can cause the barrel to freeze during the winter months. PW <br />staff measures the amount of ground water in the barrel and adds the appropriate amount of a food <br />grade anti -freeze. Like red tops hydrants, if this process isn't completed annually, before the winter <br />months, the hydrant barrel could freeze, damaging the hydrant and making it inoperable for use in the <br />winter months. <br />Hydrant Winterizing Map <br />43 <br />