CCP 02-10-1992 - Laserfiche WebLink

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. "- . CONSUL liNG ENGI NEERS Maier Stewart & Associates Inc. MEMO TO: HONORABLE MAYOR AND CITY COUNCIL CITY OF ARDEN HILLS FROM: TERRY MAURER AND MARK GRAHAM fI1G-' SUBJECT: TILLER LANE STREET RECONSTRUCTION PUBLIC HEARING DATE: FEBRUARY 4, 1992 FILE NO: 520-028-20 The public hearing for the Tiller Lane Street Reconstruction Project is scheduled for the February 10, 1992 City Council meeting. The feas i bi 1 i ty study for this project was presented at the November 25, 1991 City Council meeting, which estimated project costs and assessment rates, During preparation of the plans and specifications, soil borings were obtained to verify the existing soil conditions and support the proposed street improvements. While we included an estimated amount of soil . correction to construct the improvements in the feasibility study, the soils report indicates that the existing clay and organic soils are worse than anticipated. The existing soil is recommended to be removed to a depth of 18" beneath the street improvements and replaced with a free-draining material to address drainage and frost heaving problems. Drain tile is also recommended to collect moisture beneath the pavement and direct it to existing storm sewer, As expected, the additional sub grade correction work and drain tile installation increases the estimated assessment rate for the project. This assessment rate, as defined by the City's Assessment Manual, is based on 50% of the total reconstruction cost of the improvement. Based on additional sub grade work necessary, it is recommended that an assessment rate for street reconstruction be estimated at $35.28 per assessible foot. This assessment fate will be revisited following receipt of bids for the project. As a comparison, the estimated assessment residential rate for North Snelling Avenue at the public hearing was $27.50. Following receipt of bids, the assessment rate was reduced to $21.00 per assessible foot. However, additional soil corrections during construction, at an estimated cost of $40,000, was later necessary for the project. Following the public hearing, it would be appropriate for the City Council to consider the two attached resolutions. The first resolution orders the improvement. The second resolution approves the plans and specifications and orders the advertisement for bids. . 1959 SLOAN PLACE, ST. PAUL, MINNESOfA 55117 612.774-6021 9800 SHELARD PARKWAY, MINNEAPOLIS, MINNESOTA 55441 612-546.0432 Equal Opportunity Employer