05-27-25-WS - Laserfiche WebLink

Home Browse Search

Water Distribution System Hydraulic Model Calibration and System Evaluation Report Chapter 2 – Existing Water Distribution System December 2019 P05049-2019-000 Page 2 CHAPTER 2 EXISTING WATER DISTRIBUTION SYSTEM The performance of a finished water distribution system is evaluated by its ability to deliver the required flows (customer demands and fire-fighting needs) while maintaining adequate system pressures and water quality. Meeting these requirements, in part, depends on the components within the existing distribution system. The following sections provide an overview of the major components of the Arden Hills water distribution system. 2.1 Overview of Existing Water Distribution System Major components of the distribution system include two (2) high service pumps at the East Side Booster Station, approximately 53 miles of water mains, two (2) elevated water storage facilities, the North Tower and South Tower respectively, and about 560 hydrants. Arden Hills purchases all of its water through three (3) bulk meters from the City of Roseville, which first purchases water from Saint Paul Regional Water Services (SPRWS). The South Tower, located in the southeast area of the city, is filled by the Roseville Booster Station. The East Side Booster Station, located next to the South Tower, pumps water into the North Tower located in the northeast area of the City. The water distribution system serves customers throughout the City of Arden Hills. In 2018, the water distribution system served an estimated population of 9,919 people through 2,767 connections. This population estimation was interpolated from Table 2.1 in Chapter 2 – Community Profile from Arden Hills’ draft 2040 Comprehensive Plan. Figure 2-1 and Figure 2-3 present a detailed map of the existing water distribution system by water main size and pressure zone, respectively. 2.1.1 Water Main The water distribution system network consists of approximately 53 miles of water main varying in size from 4 inches to 16 inches in diameter, with approximately 66 percent ranging in size from 6 to 8 inches. The water main found in the distribution system generally consists of ductile iron pipe (DIP) and cast-iron pipe (CIP). DIP pipe constitutes the majority of the water main in the distribution system at 52 percent. CIP pipe constitutes most of the remaining portion of the distribution system at 43 percent. There are also relatively small amounts of high-density polyethylene (HDPE) and polyvinyl chloride pipe (PVC) in the system, as well as approximately 2.3 miles of pipe with where the material is unknown. Water main information, including size and material, is included in Table 2.1. Note that this study did not include evaluation of private water main located within the distribution system. The summary provided below represents the infrastructure included as information provided by the City.