CCP 10-10-2000 - Laserfiche WebLink

Home Browse Search

I I I I I I I . I I I I I I I , I Special Case Street: Fernwood Court, Ingerson Court These streets serve less than 5 residential properties each and are dead-end roadways less than 500 feet in length. The proposed width of 24 feet is adequate for two-way traffic, emergency vehicles and City maintenance when no parking is allowed. One way traffic is possible when vehicles are parked on one side of the road only. Due to the low number of residents served by these streets and the availability of off street parking, the parking restriction is not anticipated to cause any hardship. Existing right of way allows for standard width streets in both of these cases in this project however there is not adequate right of way for standard cul-de-sac bulbs. The report recommends that 30 foot radius bulbs be constructed at the end of both of these streets. The narrower width provides for less runoff, reduces construction and maintenance costs and provides a passive traffic calming effect which is generally desirable on local residential streets. The 24 foot width also signals to motorists that the street provides a "lesser function" than adjacent collector or local streets and therefor will tend to guide traffic along those streets. Project Cost Implications For each 4 foot of street width reduction from 32 feet, the City can expect to realize approximately $18.00 in project cost savings per foot of roadway length. For Example, the cost to reconstruct Carlton Drive (1450 feet long) at the proposed 28 foot width is approximately $205.00/ft or $300,000.00. If Carlton Drive is constructed to a 32 foot width, the eslimated project cost is $326,000.00. Proposed Storm Drainal!:e Improvements The proposed improvements include storm sewer construction in all roadways scheduled for reconstruction. Storm sewer improvements include catch basins along curb lines and sewer connections to outlets into Femwood Channel or Hamline Avenue ChannellPond improvements described below. Existing storm sewer facilities located in Femwood Court and Femwood Street, Ingerson Road and Carlton Drive are proposed to be replaced with some modifications. The existing storm sewer condition and location will be field surveyed as a part of final design. If the sewer is found to be in a usable location, of good condition and adequate capacity, the plans will provide for Ihe reuse of the existing storm sewer. The proposed storm sewer improvements are based upon collecting street runoff and transporting that runoff to the regional ponds. As a result of the Task Force meetings, the proposed storm sewer improvements have been modified to include the use of Rain Gardens along Ingerson Court, Hamline Avenue and the low area of Carlton Drive with resident approval. Rain gardens function as runoff infiltrators and help reduce the overall amount of runoff carried by storm sewers. Existing soil conditions will also have a significant impact on the effectiveness of the rain garden to handle runoff. The amount of piping proposed for the project may be reduced in some areas as a result of the rain gardens however overflow catch basins and piping are still necessary with the use of rain gardens as their capacity is limited to low volume rainfall events. There are two properties located within the project area which will likely require area drains and 5