11-20-2019 Council Packet - Laserfiche WebLink

Home Browse Search

Prepared by: Bolton & Menk, Inc. ALLEN AVENUE Allen Avenue Improvements ǀ N15.119846 Page 3 II. ALLEN AVENUE BACKGROUND Allen Avenue from Centerville Road to Edgerton Street is an urban residential street. Annual average daily traffic (AADT) data for this road is unavailable but assumed to be less than 2,000 vehicles per day classifying it as a low-volume road. Refer to Figure 1 in Appendix A for a depiction of the project location. The Allen Avenue street and utility infrastructure between Desoto Street and Edgerton Street were constructed in 1993 as part of the 1993 Street and Utility Improvements Project, City Project No. 92-11. The Allen Avenue street and utility infrastructure between Centerville Road and Desoto Street was constructed in 1998 as part of the Pitrina Park Terrace development. Allen Avenue has received crack seal and sealcoat treatments in an effort to prolong the life of the pavement. Annual pavement patching has also occurred as needed. The utility infrastructure has been maintained on a routine basis since construction. EXISTING CONDITIONS 1. Streets West of Desoto Street, Allen Avenue is 30’ wide measured from face of curb to face of curb and includes surmountable curb and gutter. East of Desoto Street, Allen Avenue is 32’ wide and includes B618 barrier curb and gutter. The bituminous pavement within the study area shows wear and distress due mostly to age, as indicated by the pavement oxidation, cracking, raveling, and potholes. A geotechnical investigation was performed by Braun Intertec which included 5 pavement cores. The associated report is not included with this report but is available at City Hall. The soil borings indicated that the bituminous thickness ranges between 2.25 inches and 5.25 inches. The aggregate base thickness ranges between 12 inches and 24 inches. 2. Watermain The existing watermain is a 16-inch diameter ductile iron pipe from Centerville Road to Desoto Street. East of Desoto Street, the existing main is 8-inch diameter ductile iron pipe and 6-inch diameter ductile iron pipe. Refer to Figure 2 in Appendix A for a depiction of the existing utility infrastructure. The water system has performed well and there are no known issues with the system. Based on the age, type, and positive performance of the watermain, the useful life of the system is expected to outlast the pavement improvements described in this report. 3. Sanitary Sewer The existing sanitary sewer 12-inch diameter reinforced concrete pipe and conveys wastewater west towards Centerville Road. City maintenance personnel has noted that there are no known deficiencies with the sanitary sewer system. Bolton and Menk staff reviewed each of the sanitary sewer structures within the project area. The structures are precast and in good to very good condition. Based on the age, material, and positive performance, the useful life of the sanitary system is expected to outlast the pavement improvements described in this report. 4. Storm Sewer The existing storm sewer varies in size from 8-inch diameter to 48-inch diameter and is a combination of reinforced concrete pipe and high-density polyethylene. Drainage from the project is conveyed via piping to a series of regional stormwater ponds located north of Allen Avenue. City maintenance personnel has noted that there are no known deficiencies with the storm sewer system. Bolton and Menk staff reviewed each of the