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Home My WebLink About2.b. Sanitary Sewer Extension Discussion E X E C U T I V E S U M M A R Y City Council Work Session Meeting: January 5, 2021 AGENDA ITEM: Sanitary Sewer Extension Discussion AGENDA SECTION: Discussion PREPARED BY: Kim Lindquist Community Development Director AGENDA NO. 2.b. ATTACHMENTS: Utility Map, Septic List, Sewershed Map APPROVED BY: LJM RECOMMENDED ACTION: Discussion Item Only SUMMARY At the December worksession, the City Council discussed the potential for a lot split on the property at 2650 130th Street. The issue raised was whether the Council should begin to extend city utilities, particularly sanitary sewer, to permit hooking up to City services rather than allowing additional rural residential lots. The property is at the south edge of the cit y interceptor designated to serve the “triangle area” the neighborhood bounded by Hwy 3, Biscayne Avenue and 130th to the south. The City’s Comprehensive Sanitary Sewer Plan places this area, along with property to south of 130th and west of Hwy 3 within the Lan-O-Ken sewershed. Portions of the sewershed are within the MUSA, like the Harmony neighborhood, and portions north are designated for permanent rural residential in the Comprehensive Land Use Plan. Other property, like those in the triangle area are designated for Transitional Residential because of the anticipated need for future public utility extension, rather than private well and septic. When discussed in December the Council asked for additional information to assist in deciding whether to begin extension of public infrastructure. At that time, staff provided potentially three alternatives, do nothing, extend utilities to 130th, extend utilities further north; into the Blanca neighborhood. The following provides additional information to assist in decision making. DISCUSSION There are 69 properties generally located with this area. Based upon city records, approximately 37 have a septic system that was constructed in 2000 or after. It is estimated that a septic system generally has a life of 30 years; although there are always exceptions. The State and Dakota County require pumping of septic systems on a 3-year cycle to ensure compliance. However, the pumping reports often do not identify non- compliant systems, only ones where there are significant problems, like surface discharge. Typically, non- compliance becomes apparent when the property has a pending sale. That compliance inspection provides better information about the system and whether it meets design requirements. For example, design rules changed in the mid-90’s requiring three feet of “good” soil. If the system was built prior to 1996, the compliance inspection requires two feet separation, but many are not meeting that standard and therefore have a non-compliant system. Issues often arise when a new system is needed. The lots in this area are smaller for consideration as rural lots, running from 3.91 acres to .37 acres with the average at 1.37 acres. The sizing limits placement of a septic and well (with required separation) along with a house, garage, driveway and any other accessory structures or uses. 2 In the recent past, due to a higher water table, a mound system is required for the replacement system. This transfers the entire system above ground to obtain appropria te separation. A mound system is more costly due to importing of soils and additional labor. A mound system, due to its configuration takes up more space on the site due to side slopes and would typically cost around $20,000. It is estimated an in- ground system would cost approximately $15,000. The consulting engineer has provided some cost estimates for extension of sanitary sewer service into the triangular neighborhood. The first extension would be approximately $250 ,000-300,000 and would bring the service up to 130th with some extension along 130th. That price is without easement acquisition costs. The utility would need to traverse 2655 132nd Court W, north to south, for approximately 490’. The City would obtain needed easements from the Andersons at 2650 130th Street as part of their lot division request. That would get the main up to 130th. Staff anticipates running water within the same sanitary sewer trench, which is estimated at an additional $126,000. The total for the two utilities would be approximately $425,000. Staff has verified that there is no intention to pave the roads within the neighborhoods north of 130 th. If that changes in the future, extension of utilities with road paving makes sense. Further extension into Bolivia and Blanca roadways is estimated at about $1 million with replacement of aggregate roads. Extension of sanitary sewer from the north, on 125th , 124th, and Blanca Avenue requires installation of a lift station and forcemain into the south system. That work is estimated at $1.4 million including the lift station. In review of existing Core funds, there appears to be enough funding to permit extension of water and sanitary sewer to 130th. A full assessment of all projects would need to be made to determine expansion beyond 130th Street. In reviewing the 132nd Court project, the 2655 property was assessed approximately $15,000 in supplemental water and sewer connection charges. It wo uld be expected as the utilities were extended to the north, additional charges to individual lots would occur in the same manner. It would be expected that the new lot on the Anderson property along with the existing structure be required to hook up to new public utilities. RECOMMENDATION At a previous worksession, staff indicated there were three options the Council could explore relating to public infrastructure in the triangle area; (a) do nothing, (b) do some extension, or (c) bring in the entire system as briefly explored in the discussion above. Staff is recommending exploring extension of sanitary sewer to 130th Street, option B above. The first step would be to approach the most affected property owner at 2655 132nd Court to determine potential cost and willingness for easement acquisition. That would allow the City to bring the services closer to the area that will benefit from sanitary sewer and would permit any new home on the Anderson property to hook up to city sanitary sewer service. ROSEMOUNT MINNESOTA 12/29/2020 Proposed Sanitary Sewer Extension 12915 217526652660 12313 122593445 262526802192 1297612261 12380 12730 12205 12370 1280512930 12520 12645 12890 28632680 125752900 2 1 4 1 12545 2686 12525 2500 12976 2813 2275 12960 12773 3080 12365 12375215 9 12086 12590 12845 12430 13100 265527802890 265 5 12895 2743 12600 1223112965 2655 1260512610 2615 12465 2100 26252675 12885 2219 12540 1276921 5 2 12790 12246 12467 234512101 12139 264527832800 12962 20901293012753 12685 12550 240013051 1255012375 2685 12341 216812861 12235 12888 12485 13032 122023025 12895264013086 1297629031279012334 2925 214023292700 13037 12761 3022 12390 2193 12050 126852684 12850282012165 12920 216913136 12175 265012700 1291912610 13088 2200 12795 2416 2990 12255 12766 12310 12890 12445 13054 272 0 2305 12800 123 5 8 12686 26442800 2145 12725 128252740 3143 2261 1297612820 12228 12238 2300 1274112000 12365213512470 12795 3138 12260 12355 211312909 2685 254313046 219912552 2650 1289012385294312890 3087 12450 12865 2200 12255 277121182685257521871239512735 12750 12289 12164 12125 12171 269 5 12490 263512675 12802 2100282312540 12920 129952860SROBERT TRL MCANDREWS R D W DODDBLVDDODD CT BOLIVIAAVE W 124 T H S T W BENGALAVEW128TH ST W 1 2 5 T H S T W BLANCA AVE WCHARLSTON WAY 13 0 THWA Y 131ST ST W 125TH CT W 130TH ST W 1 2 6 TH ST WBISCAYNEAVE Proposed Lift Station Proposed Sanitary Forcemain Proposed Sanitary Sewer Proposed Water Main 0 400 800200 Feet ROSEMOUNT MINNESOTA 12/29/2020 Proposed Sanitary Sewer Extension 12915 266012313 122593445 26802192 1297612261 12380 12730 12205 12370 1280512930 12520 12890 28632680 12575290012545 12525 2500 12976 2275 12960 12773 12055 12365 1237512086 12590 12845 12430 265527802890 265 5 12895 2743 12600 1223112965 1260512610 12465 2625299012885 2219 12540 1276912790 12246 12467 234512101 12139 2783129621293012753 12685 12550 24002980 1255012341 12861 12235 12888 12485 122021289526401297629031279012334 23292700 13037 12761 12390 2193 12050 1268512850282012165 12920 12175 265012700 1291912610 2200 12795 2416 2990 12255 12766 12310 12890 12445 272 0 2305 12800 123 5 8 12686 26442145 2800 12725 128252740 2261 1297612820 12228 12238 2300 1274112000 1236512470 12795 12260 12355 12909 2685 2543219912552 128902943 12450 12865 2200 12255 26852575218712735 12750 12289 12164 12125 12171 269 5 12490 12675 128022823 12540 129952860 0 400 800200 US Feet HouseNumber Street Pumping Record PumpDue ISSUES System Install date 2625 130TH ST W 04/30/09 4/30/2012 1994 2575 130TH ST W 11/3 /2016 11/3 /2019 6/9/1905 12802 ROBERT TRL S 11/17/2016 11/17/2019 1998 12334 ROBERT TRL S 5 /11/2017 5 /11/2020 1994 12390 BLANCA AVE 7 /5 /2017 7 /5 /2020 unknown 12741 BOLIVIA AVE 8 /8 /2017 8 /8 /2020 2004 12358 ROBERT TRL S 4 /23/2015 8 /13/2020 2015 12520 BLANCA AVE 8/14/2015 8 /14/2020 2015 12550 ROBERT TRL S 8 /17/2017 8 /17/2020 unknown 12171 BISCAYNE AVE 9 /27/2017 9 /27/2020 2003 12231 BISCAYNE AVE 10/18/2017 10/18/2020 2000 12750 ROBERT TRL S 11/6 /2017 11/6 /2020 2001 12490 BLANCA AVE 11/14/2017 11/14/2020 as-built from 1979. failed compliance inspection 2020 1979? 2695 124TH ST W 11/29/2017 11/29/2020 compliance inspection pass 2006 1999 12552 ROBERT TRL S 5 /18/2018 5 /18/2021 1990 2680 125TH ST W 6 /13/2018 6 /13/2021 2004 12255 BISCAYNE AVE 6 /25/2018 6 /25/2021 unknown 12540 BLANCA AVE 7 /10/2018 7 /10/2021 compliance inspection pass 2014 1986 12575 BISCAYNE AVE 7 /17/2018 7 /17/2021 2011 2685 128TH ST W 7 /26/2018 7 /26/2021 2000 2655 128TH ST W 7 /26/2018 7 /26/2021 2010 12888 ROBERT TRL S 7 /26/2018 7 /26/2021 1989 12238 ROBERT TRL S 7 /30/2018 7 /30/2021 2002 2640 125TH ST W 8 /3 /2018 8 /3 /2021 1993 12370 BLANCA AVE 8 /9 /2018 8 /9 /2021 as-built from 1979 1979? 12919 BOLIVIA AVE 8 /9 /2018 8 /9 /2021 unknown 12380 BLANCA AVE 8 /13/2018 8 /13/2021 1998 12365 BLANCA AVE 8 /17/2018 8 /17/2021 1993 12976 ROBERT TRL S 8 /25/2016 8 /25/2021 2016 2655 125TH ST W 9 /6 /2018 9 /6 /2021 address not in Laserfiche 2655 124TH ST W 9/6/2018 9/6/2021 2003 12289 BISCAYNE AVE 9 /13/2018 9 /13/2021 1987 12259 BISCAYNE AVE 9 /13/2018 9 /13/2021 compliance inspection pass 2005 1996 12930 BLANCA AVE 9 /28/2018 9 /28/2021 2007 12685 BOLIVIA AVE 10/15/2018 10/15/2021 1987 12790 BLANCA AVE 10/19/2018 10/19/2021 2009 12485 BLANCA AVE 10/22/2018 10/22/2021 2011 12769 BOLIVIA AVE 10/26/2018 10/26/2021 2003 2685 125TH ST W 10/29/2018 10/29/2021 unknown 12139 BISCAYNE AVE 11/21/2018 11/21/2021 2000 12467 BISCAYNE AVE 1 /7 /2019 1 /7 /2022 1999 2660 125TH ST W 1 /31/2019 1 /31/2022 1996 12610 ROBERT TRL S 3 /7 /2019 3 /7 /2022 system replaced in1992 per 2019 compliance inspection. no record of replacement in Laserfiche. One tank replaced 2019, treatment area ok per 2019 compliance inspection 1992? 2543 130TH ST W 3 /15/2019 3 /15/2022 2006 12313 BISCAYNE AVE 5 /6 /2019 5 /6 /2022 2001 12976 BISCAYNE AVE 5 /10/2019 5 /10/2022 1997 12600 ROBERT TRL S 5 /15/2019 5 /15/2022 2010 2650 125TH ST W 5 /17/2019 5 /17/2022 1999 12470 BLANCA AVE 5 /21/2019 5 /21/2022 2010 12310 ROBERT TRL S 5 /29/2019 5 /29/2022 1996 2720 124TH ST W 6 /12/2019 6 /12/2022 1999 12465 BLANCA AVE 7 /17/2019 7 /17/2022 2002 12545 BLANCA AVE 7 /17/2019 7 /17/2022 1987 2500 130TH ST W 8 /2 /2019 8 /2 /2022 compliance inspection pass 2005 1999 12445 BLANCA AVE 9 /3 /2019 9 /3 /2022 2014 12800 ROBERT TRL S 9 /25/2019 9 /25/2022 1985 12920 BISCAYNE AVE 10/1 /2019 10/1 /2022 unknown 12525 BISCAYNE AVE 11/1 /2019 11/1 /2022 1985 12890 BOLIVIA AVE 11/1 /2019 11/1 /2022 2009 12773 BLANCA AVE 12/3 /2019 12/3 /2022 compliance inspection pass 2005 1986 12202 ROBERT TRL S 12/4 /2019 12/4 /2022 2003 12805 BOLIVIA AVE 12/6 /2019 12/6 /2022 compliance inspection pass 2016 2006 12450 BLANCA AVE 1 /2 /2020 1 /2 /2023 unknown 12909 BISCAYNE AVE 3 /20/2020 3 /20/2023 1991 12228 ROBERT TRL S 3 /24/2020 3 /24/2023 2002 2680 128TH ST W 6 /8 /2020 6 /8 /2023 compliance inspection pass 2016 2009 12895 BLANCA AVE 6 /20/2020 6 /20/2023 2018 2345 130TH ST W 6 /30/2020 6 /30/2023 compliance inspection pass 2006 1994 12735 BLANCA AVE 7 /1 /2020 7 /1 /2023 2015 12355 BLANCA AVE 7 /2 /2020 7 /2 /2023 2020 12375 BISCAYNE AVE 7 /2 /2020 7 /2 /2023 2008 2644 125TH ST W 7 /30/2020 7 /30/2023 2006 12850 BLANCA AVE 8 /5 /2020 8 /5 /2023 2015 12753 BLANCA AVE 8 /12/2020 8 /12/2023 compliance inspection pass 2009 2004 12686 ROBERT TRL S 9 /3 /2020 9 /3 /2023 unknown 12730 BLANCA AVE 9 /21/2020 9 /21/2023 1994 12766 BOLIVIA AVE 9 /25/2020 9 /25/2023 1997 12341 BISCAYNE AVE 9 /25/2020 9 /25/2023 2015 12430 BLANCA AVE 11/12/2020 11/12/2023 1986