HomeMy WebLinkAbout011 - Water & Sewer Tech Memo Morrison
Maier le rYlO
engineers•surveyors•planners-scientists
TO: Parker Lange, Development Manager
FROM: Matt Ekstrom
DATE: May 24, 2024 ;� t`�°S'2yiyo
JOB NO.. 5659.018 Gr'? 6\
RE: GPA/ZMA Water& Sewer Tech Memo
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CC: file
❑Urgent ❑For Review ❑Please Comment ❑Please Reply ®For Your Use
This Tech Memo is a supplement to the Zone Map Amendment and Growth Policy
Amendment Applications submitted for the 39.86 acres of land located at the corner of South
19th Ave. and W Graf St. This land is currently zoned a combination of Residential Low
Density (R-1) and Residential Moderate Density (R-2) and is currently designated by the
Community Plan to be Urban Neighborhood.
The Growth Policy Amendment submitted with this application requests to change a portion of
the property from the Urban Neighborhood to Community Commercial Mixed Use. The other
portion of the property will remain as Urban Neighborhood.
Waste Water Flow Rate— Per Existing Zoning:
The zoning designations of R-1 (33.065 Acres) and R-2 (6.795 Acres). From Table 2-13 of the
2015 Wastewater Facility Plan (shown below). Zoning R-1 = 546 GPD/AC
Zoning R-2 = 728 GPD/AC
Existing WW Flow Rate = (33.065 Acres) (546 GPD/AC) + (6.795 Acres)(728 GPD/AC)
Infiltration = (39.86 Acres)(150 gallons/acre/day) = 5,979 GPD
Total WW Flow Rate = 28,979 GPD
Waste Water Flow Rate— Per Proposed Zoning:
The zoning designations of 132-M (9.123 Acres) and REMU (30.741 Acres). From Table 2-13
of the 2015 Wastewater Facility Plan (shown below).
Zoning B-2 = 2000 GPD/AC
Zoning REMU = 1456 GPD/AC
N'5659A096 P-owdence-7MA Blk"PAS 494VO4 DesignARepor's15669 0'R rPA-/W1A Walcr A Sewer her IAler-io=.x
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.. Morrison
IIIIIIII�GPA/ZMA Water&Sewer Tech Memo Maierle
Proposed WW Flow Rate = (9.123 Acres) (2000 GPD/AC) + (30.741 Acres)(1456 GPD/AC)
Infiltration = (39.86 Acres)(150 gallons/acre/day) = 5,979 GPD
Total WW Flow Rate = 68,984 GPD
Table 2.13 Wmtewater blow Rate for Zoned Undeveloped Arem
PsAjoation ihvctlinv t nit.PS.,Arn GAlo/ACRE/DAY
R,'; 65 9111
R-t 3-) 546
R-2 5 2 728
RA 65 91t1
R•9 111.4 1,450
R-0 5 728
R1111 5-2 TAI
B-1 I,INNI
B 2 -IIIK)
11.3 3,IXQ
11.1 960
51.2 960
B_1' 960
\G.1AIU 65 910
UNIU 10.4 1,45.E
REAW WA I;156
PI1 1,010
1.The Iltnv tlltteation in the.ta1Jc is based on g"ns area_
Water Flow Rate — Per Existing Zoning:
The zoning designations of R-1 (33.065 Acres) and R-2 (6.795 Acres). From Table 3.7 of the
2015 Water Facility Plan (shown below). Zoning R-1 = 620 GPD/AC
Zoning R-2 = 820 GPD/AC
Existing Average Day Flow = (33.065 Acres)(620 GPD/AC) + (6.795 Acres)(820 GPD/AC)
Total Water Flow Rate = 26,072 GPD
Water Flow Rate — Per Proposed Zoning
The zoning designations of B2-M (9.123 Acres) and REMU (30.741 Acres). From Table 3.7 of
the 2015 Water Facility Plan (shown below).
Zoning B-2 = 705 GPD/AC
Zoning REMU = 873 GPD/AC
Proposed Average Day Flow = (9.123 Acres) (705 GPD/AC) + (30.741 Acres)(873 GPD/AC)
Total Water Flow Rate = 33,269 GPD
Zoning Description Maximum Day Average Day Infill
District
B-1 Neighborhood Business District 1.925 935 47
B-2 Community Business District 1.405 705 206
B-3 Central Businc s District 4.63=0 2.400 1
BP Business Park District 6Ci5 390 141
HNIU Northeast Historic 4lixcd-Lrsc District 1.450
M-I Light Manufacturing District 305 210
41-1 Manufacturing and industrial District 100 95 149
PLI Public Lands and Institutions District 490 220 29
Residential Single-Household Lo`i
R-1 620 4;
Dcasitv District
Residential Two-Household.Mcdium
R_2 1.895 420 206
Density District
R-3 Residential Medium Densitrr District 1.290 ;;; 674
R-4 Residential High Density District 1.040 570 1'90
REAL Residential Emphasis Mixed L_sc 1.833 . 'I 115
Residential Manufactured Horne
R iH 420 265 54
Community District
R-O Residential-Officc District ifs{1 3 5Q
R-S Residential Suburban District 190 70 35
L*N1U Urban MiXcd L-'W 1.75, 51 31
Total 3.120
Table 3.7: Future Infill Zoning District NN'DFs
Even though the Flow Rate based off the existing zoning is less than the Flow Rate based off
the proposed zoning we feel the surrounding water and sewer infrastructure is more than
adequate to handle the change in zoning and growth policy designation.
The water and sewer infrastructure surrounding the property requesting the Zone Map
Amendment and Growth Policy Amendment is substantial. Here is an inventory of the
surrounding utility infrastructure:
Water. -There is an existing 24" water main located in South 19th Avenue and a 10" line
located in West Graf Street. Eventually, there will also be water mains located in Arnold Street
to the north and South 15th Street to the east.
Sanitary Sewer. -There is an 18" sewer main located in South 19th Avenue and an 8" sewer
line located in West Graf Street. This property has (2) existing 8" sewer stubs located on South
19 th Avenue. Eventually, there will also be sewer mains located in Arnold Street to the north
and South 15th Street to the east.
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