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Water Distribution System Hydraulic Model Calibration and System Evaluation Report Chapter 5 – Water Distribution System Field Testing December 2019 P05049-2019-000 Page 17 To properly calibrate the model, the following information was recorded at the time of the fire hydrant flow test: 1) time and date; 2) hydrant location; 3) flow of hydrant being flowed; 4) duration of the hydrant flow test; and 5) static and residual pressures at the corresponding hydrant location. The results of the fire hydrant flow tests are discussed in Chapter 6. Simultaneous information from the SCADA system on water storage levels and Booster Station pumping rates was also collected and used in the calibration process. 5.2 Extended Pressure Testing To gain background information on the roughness coefficient of water mains, extended pressure testing was performed at eight (8) locations throughout Arden Hills’ water distribution system. HPRs were installed on fire hydrants for approximately one week (from June 20th through July 1st, 2019) to record changes in pressures within the distribution system. Appendix B contains a map indicating the location of each extended pressure test as well as field data sheets showing detailed locations of each extended pressure test. The locations for Tests 3 and 5 were only used during the fire hydrant flow tests in order to measure the water tower levels. At the start of the extended pressure testing period, the HPRs for Tests 3 and 5 were moved to different locations. The field pressures for the EPS tests were sampled at 1 second intervals and the minimum, maximum, and average pressures were recorded at 5 minute intervals to allow for extended data logging. This data was used to fine-tune pipe roughness coefficients of water mains in the distribution system. The results of the extended pressure testing are discussed in Chapter 6.