Agenda - Council - 11/14/2017 - Laserfiche WebLink

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subgrade between the curb and gutter, and then the top 3'/2 inches of reclaim material would be removed and hauled off site. Then 3'/2 inches of new bituminous pavement would be installed over the remaining compacted reclaim material, resulting in a 7-ton pavement design, which is standard for residential streets. The existing storm sewer system is in good condition. Only casting adjustments and catch basin grouting work is proposed. The engineer's opinion of probable costs for completing the proposed improvements on River's Bend as outlined in the Feasibility Report is $301,738.31. Estimated project costs include 5-percent contingency costs and 23-percent indirect costs for administrative, engineering, finance and legal costs. A summary of the engineer's opinion of probable costs is included inAppendix B of the Feasibility Report. Forty-four (44) parcels have been identified as receiving special benefit from the improvements. These parcels are identified in the preliminary Assessment Map and Roll, which are included inAppendix C of the Feasibility Report. Twelve (12) pavement corings were completed by WSB and Associates (WSB) to assist with the preparation of the Feasibility Report. WSB offered pavement design recommendations, which were considered and incorporated to varying degrees within the report. A copy of WSB's report is attached inAppendix D of the Feasibility Report. This improvement project, which is listed in the City's current Capital Improvement Program, is proposed to be funded using a combination of special assessments to benefiting properties, street reconstructions bond proceeds, and stormwater utility funds. Staff recommends using special assessments to pay for 25-percent of eligible improvement costs in accordance with the City's Special Assessments Policy. Assessments are proposed to be equally applied across 44 benefiting parcels using the "per lot" method of assessment, which is the typical method of assessment applied to single-family parcels of roughly the same size. All costs for this project are eligible for special assessments since the street is proposed to be reconstructed at its existing width, and since the existing and proposed pavement sections both meet 7-ton design standards meaning they are equivalent sections. This project does not include any ineligible project costs related to the use of special assessments. Staff recommends ordering a special benefit consultation report for this project to verify that the proposed assessment amounts will not exceed the amount of benefit to any of these properties. If the report concludes that the benefit to any of the properties is less than the proposed preliminary assessment rate, Staff would propose to lower the assessment rate accordingly at the Assessment Hearing. However, if the special benefit consultation report verifies that the assessment rates as proposed are justified, Staff would propose to adopt the final assessment roll using the rate as preliminarily proposed. On January 24, 2017, the City Council directed Staff to postpone the River's Bend Street Reconstructions project until the 2018 construction season, allowing the project to be constructed in conjunction with the Stanhope Terrace Street Reconstructions project. The intent of this direction was to provide for the most cost-effective project by combining it with a similar project in close proximity, thereby potentially realizing a cost savings due to economies of scale. This project was initially intended to be a mill and overlay project, but after learning that the existing bituminous pavement section would not allow for a mill and overlay due to pavement thicknesses in some locations of 2-inches, the project was converted to a full pavement reconstruction. This project is necessary, feasible, and cost-effective from an engineering standpoint, and can be constructed as proposed in the Feasibility Report. Staff proposes to bid and construct the proposed improvements in conjunction with the other street reconstruction projects proposed for 2018 in the Stanhope Terrace and North Forty developments.