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674 • Frozen services generally are rare, with there being about 100 known high risk 675 homes that are alerted annually about this potential. However, in 2014 the city 676 experienced 165 frozen services; a problem found state-wide due to low 677 temperatures for an extended period of time compounded by minimal snow 678 cover. 679 680 Mr. Culver noted that the typical frost line is at a depth of 3' — 4', and with the 681 depth of a typical water line at 7' — 7.5', there should be no freezing problems. 682 683 City infrastructure water service problems: 684 • On average since 1999 the city experiences 29 water main breaks/year 685 • However, in 2014 the city experienced 49 water main breaks 686 687 Mr. Culver provided some photos of cr ater m '� reviewed how they were 688 repaired; and results when fixed. 689 690 As part of their initial research on s e ownership, Mr. Cul ported that staff 691 did a survey of colleagues in other citi and ownership between blic and private 692 lines. Of the 42 respon, , Mr. Culver reported that only 4 reported anything 693 different than public ownership and maintenance of the sanitary sewer service to 694 the main while some had distinctions on ownership of the wyes with some covered 695 by the city up to the right -of --way line. With the jatermain line Mr. Culver 696 reported that came out about 50/50 with some coverinwnershipand maintenance 697 up to the curb stop and others consisting of private nership all the way to the 698 main. 699 700 Mr. Culver advised he would bring some actual physical examples of various connections701 for next month's discussion. com„ onents an ,,,,,,iilll 702 703 fAs noted during the sanitary sewer ntation to the PWETC, Mr. Culver noted 704 National League of Cities service line warranty program for both water and 705 sewer service lines previously lluded to, that included frozen lines, and upon 706 further examination maybe anIption for homeowners. 707 708 For nex onth's presentation, Chair Stenlund asked staff to include climate 709 resilience information and if climate change is changing (e.g. insurance rates); how 710 water service interruption could be avoided during a climate crisis; service life for 711 copper mains in Roseville's typical clay soil versus sandy soils that may inform 712 homeowners on a line's life expectancy and/or depth; and ground water pumping 713 and if and when still used beyond for cooling purposes or dumped without any other 714 benefits. 715 716 Mr. Culver clarified that in Roseville, the only groundwater pump used is for the 717 fire station and skating center's geothermal system that was all recycled. Mr. 718 Culver noted that the only water used by the City is surface water purchased from Page 16 of 18