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3.EXISTING CONDITIONS 3.1 STREET AND UTILITY IMPROVEMENTS 3.1.1 Sanitary Sewer The existing sanitary sewer system along Rankin Road consists of 9-inch-diameter vitrified clay pipe (VCP) installed in 1950s. The joint sealing material in use at that time was typically an oakum and bituminous material. The existing sanitary sewer system flow rates have been monitored in various areas throughout the City as a measure to identify inflow and infiltration (I&I) issues within the City. The monitoring results have revealed there is an increase in sewer flow within the area immediately following rainfall events. This increase in flow is a result of clear water (groundwater or stormwater) entering the sanitary sewer. The source of this clear water is likely due to the connection of foundation drains or sump pumps to the sanitary sewer, aging sanitary sewer main and/or deficient sanitary sewer service pipes from the street to individual homes. 3.1.2 Water Main The existing water distribution main along Rankin Road was installed in the 1950s and consists of a 6-inch cast iron pipe (CIP). In 1974, a second high-pressure 6-inch ductile iron pipe (DIP) was installed to accommodate properties on the west side of Rankin Road between 33rd Avenue and 32nd Avenue. The existing 6-inch CIP system has had numerous breaks over the past few years and breaks will become more likely as the pipes have exceeded 60 years of service. In addition, the cast iron pipes are likely heavily corroded and possibly leaking. 3.1.3 Storm Sewer There are no existing storm facilities along Rankin Road from 33rd Avenue NE to East Gate Road. Stormwater along Rankin Road is directed with concrete curb and gutter. Storm sewer facilities were installed along 32nd Avenue and Croft Drive with the 2020 Street and Utility Improvement Project to collect stormwater from Rankin Road north of 32nd Avenue. The system consists of 18- to 21-inch reinforced concrete pipe (RCP) along 32nd Avenue from Rankin Road to the Croft Drive cul-de-sac and 24-inch RCP along Croft Drive from 32nd Avenue to 31st Avenue and along 31st Avenue from Croft Drive to Old Highway 8. The stormwater eventually outlets to Mirror Lake. 3.1.4 Streets Rankin Road is an urban, 30-foot-wide bituminous roadway with concrete curb and gutter. The soil borings taken along Rankin Road indicate the underlying soils consists of a sandy clay fill and silt material. This is consistent with reconstruction projects completed in the surrounding areas. 3.2 MILL AND OVERLAY IMPROVEMENTS Alleys and streets within the proposed mill and overlay improvement areas are experiencing various severities of distress. The alleys were constructed as 12-foot wide bituminous roadways. Pavement cores taken indicated existing asphalt thickness range from 2-inches to 4.5-inches with an aggregate base of sand with gravel. The majority of the core samples exhibited varying levels of deterioration and stripping, particularly in the base layer. Cracks extended through the entire pavement layer with a considerable amount of surface distress with multiple patches present across all coring locations. 37