05-22-1991 Council Agenda - Laserfiche WebLink

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a 1 1 1 1 1 1 1 1 1 1 1. 1 N We propose the placement of drain tile beneath the curb line of the street so that the subgrade can be kept free of moisture that can dampen the load carrying ability of the street. We also propose the placement of geotextile fabric to act as a membrane that will keep the unstable subsoils from being "pumped up" into the street section thus discouraging pot holes from surfacing upon the street. An alternative to the placement of fabric is the placement of 12 inches of granular material beneath the street section. However, the cost to excavate the existing material and place the granular material exceed the cost of placing the fabric. The addition of geotextile fabric and drain tile to the street section noted above will result in a street with a 20 year design life. The proposed street section for Desoto Avenue is indicated on Figure 1. New concrete curb and gutter is proposed to be placed on both sides of the street. Surmountable curb and gutter shall be placed on the east side of the street as the location of future driveways is unknown. We propose the placement of B618 concrete curb and gutter on the west side of the street in order to prevent vehicles from riding up onto the boulevard adjacent to Pioneer Park. The B618 curb is also longer lived as it is less susceptible to damage from snow plows. The street width proposed for Desoto Street is 36 feet. Typical residential streets in Little Canada are only 32 feet wide. The additional 4 feet of width allows for parallel parking on the west side of the street. The boulevard on the west side of the street will be shaped so as to allow for the placement of a future walkway. 37207RPT 5. Page 69