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<br />. <br /> <br />The highest flood known in this area occurred July 24, 1965 when <br /> <br />the north side of Agate Way was inundated by flood waters for about <br />2 blocks. Since this flood occurred, the bridge opening on Emerald Street <br />has been enlarged and a drainage ditch cut from Agate Way to the stream. <br /> <br /> <br />One of the principal flood problems is caused by the overtopping of the <br /> <br /> <br />Community Irrigation Ditch which diverts water from Coal Creek and flows <br /> <br /> <br />along the west and north side of town. When this canal is overtopped, <br /> <br />sheet flow can occur in parts of the town, mainly in the area of West 10th <br /> <br /> <br />and 11th Streets and to the east of Holly Drive. The water from the area <br /> <br /> <br />of West 10th and 11th Streets flows down the side streets and Kohl Street <br /> <br /> <br />to 6th Street and into the creek. Some of this area is serviced by <br /> <br />storm drains. The water from the area east of Holly Drive flows into a <br /> <br />small drainage, through culverts on Miramonte Drive and Main Street, and <br /> <br />into Broomfield Reservoir. Local changes in the drainage pattern caused <br /> <br /> <br />high water on May 6, 1973 to flow down East 7th Street, which was outside <br /> <br /> <br />of the city limits. Water was reported to be backed up into basements <br /> <br /> <br />in this area due to infiltration from surface runoff into the sanitary <br /> <br />. <br /> <br />4 <br /> <br /> <br />sewers. <br /> <br />. <br />