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CHAP'I'Eft I
'�" INTR.ODUCTION
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This R,eport presents results of the engineering study which analyzed focusing on developing
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alternatives for providing sanitary sewer service to the proposed Crown Point II Development located
in the South Highlands area of the City of Renton. This work was authorized by the City on January
16, 1990, under Contract No. CAG 007-90.
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The purpose of this study is to identify and analyze alternative sanitary sewer improvementa
� necessary to accommodate the proposed Crown Point II Development. The Crown Point II project is
a multi-family development which has been proposed by Polygon 2000, Inc. This project ie located
within the City's sanitary sewer moratorium area which was declared by the City Council under
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Resolution No. 2764 on July 17, 1989.
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Ob�ectives
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The objectives of this engineering study are presented below:
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1) Document the existing sanitary sewer status within the South Highlands and North Highlands
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basins within the City of Renton.
2) Determine the natural drainage area which forma the study area boundary based on
� to o a hic surve s and drain
p gr p y age patterns.
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3) Estimate wastewater flowrates based on existing land-use designations.
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4) Analyze the existing sanitary sewer system and identify capacity problem areas.
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5) Identify alternatives for providing sanitary sewer service to the proposed Crown Point II
Development.
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6) Identify excess capacity created by the proposed improvements to the existing sanitary aewer
�" system.
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CAAPTEft II
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EXISTING CONDITIONS
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This chapter describes the eusting conditions within the atudy area of the City of Renton. The
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condition of the e�sting sanitary sewer systems within the North Highlands and South Highlands
Basins are discussed. In addition,the land-use patterns and development practices are documented.
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+.r Previous Sewerate Studiea
One engineering atudy has previously been prepared which examines the existing sanitary sewer
� system within the South Highlands basin. This report is:
"An Engineering Investigation of Sanitary Sewer Improvements for the East R.enton, Heather
Downs, and South Highlands Basin," prepared by RH2 Engineering, Kirkland, Washington,
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(1989) for the City of R,enton,Washington.
This Report investigated the existing sanitary sewer system within the South Highlands Basin and
�' identified many of the existing sewers as operating at or above design capacity and unable to
accommodate the immediately proposed developments. The Report recommended replacing the
„�, existing 8" sanitary sewer interceptor with a larger pipeline.
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Studv Area
Several factora were considered in establishing the study area boundaries. These factors include
`°�" to o a h draina e atterna existin develo ment and existin sanita sewer service boundaries.
P � P Y� g P , 8 P � g TY
The study area encompasses two major sanitary sewer basins, the North Highlands Basin, and the
+� South Highlands Basin. The North Highlands Basin representa approximately ?60 acres and the
South Highlands Basin represents 597 acrea.
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The flow patterns for the existing sanitary sewer systems within these drainage basins flow from the
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higher elevations on the east side of the Basins toward Metro's Eastaide Interceptor located along
Logan Avenue which is on the west side of the Basin. The topography provides gradual slopes from
the east to the west until the valley floor, which is flat.
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Existin�Land Use
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The area within the study boundaries is governed by the City's Northeast Planning Area. The
m�jority of the area is currently developed as single family with some multi-family and commercial
+� developments within the Highlands area and industrial development on the valley floor. Most of the
single family developments were constructed during the late 1940's and 1950's to accommodate growth
� for the local industries. The City's land use plana allow for increased levela of multi-family and
commercial developments within these basins.
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Table II-1 shows a breakdown of the existing land-use designations for these two basins. More than
fifty percent of the total area within these two basins is designated for aingle family dwellings. The
�` remaining area ia divided among multi-family development, commercial, induatrial, public, and
recreational and greenbelt land-uaea.
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TABLE II-1: LAND USE ANALYSIS FOR THE
SOUTH HIGHLANDS AND NORTH HIGHLANDS BASINS
� SOUTH HIGHLANDS BASIN NORTH HIGHLANDS BASIN
LAND USE
Acreage Percent Acreage Percent
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Single Family 346.b b8.1% 443.9 58.4%
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Medium Density 65.5 11.0% 92.4 12.2%
� Multi Family
� High Density 11.1 1.9% 14.9 2.0%
Multi Family
"�` Commercial 88.7 14.9% ?2.1 9.5%
Industrial 25.b 4.3% 45.9 6.0%
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Recreational 4.2 0.7% 29.b 3.9%
�r Public 53.7 9.0% 47.4 62%
Green Belt 1.4 0.2% 14.3 1.9%
� TOTALS 696.6 100% 760.4 100%
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� Proposed Development
„� The proposed Crown Point II development is a multi-family development which involvea approximately
18?units on 11.6 acres. This development represents approximately 134 EDU's which is equivalent
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to approximately 56.2 gpm of wastewater flow. Additional proposed developments within this area
include the proposed Union Plaza Development which is a commercial development on four acres
which represents approximately 46 EDVs which is equivalent to 19 gpm of wastewater flow.
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Both of these developments should be served with sanitary sewers through the South Highlands Basin.
rr� However, the Union Plaza Development could be served by the Maplewood Basin with an extension
of the sanitary sewer main across NE 4th Street.
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CAAP'rEft III
� SA1vITARY SEWER SYSTEM ANALYSIS
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This Chapter summarizes the analysis of the sanitaiy sewer systems withi.n the South
� Highlands and North Highlands Basins. The analyses were performed based on existi.ng land
use designations and projections for saturation flowa.
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� South Hiehlands Basin
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The South Highlands Basin is one of the three basins within the moratorium area. This basin
serves approximately 59? acres. Sanitary aewers within this basin are inadequately sized to
accommodate the existing wastewater flows. The analysis for the existing system wluch serves
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this basin is shown in Table III-1. The ahaded values in the right hand column of this table
indicate those pipe sections which are over capacity. The pipe section downstream of Manhole
"" 12-226 was constructed with an adverse slope and is analyzed later in this chapter.
""" Table III-2 shows the same South Highlands interceptor under saturation conditions with the
addition of wastewater from the proposed Crown Point II development. The shaded values in
� the right hand column ehow those pipe aections which are above the design capacity. It is noted
that no additional pipe sections are above the 75°l0 level as a result of addi.ng wastewater flows
„�, from the proposed development.
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North Hi�hlands Basin
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The North Highlands Basin serves approximately 760 acres. Wastewater inputs include Sunset
� Lift Station and the Boeing Lift Station. An analysis of the North Highlanda interceptor is
presented in Table III-3.
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This basin shows excessive overloading in the 24-inch sewer along North 6th Street from
Manhole 12-172 to the Metro Interceptor. This illustrates that there is no downstream capacity
`� in the North Highlands Interceptor.
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Diversion Area
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A portion of the South Highlands Basin was considered for diversion from the South Highlands
�„ Basin into the North Highlands Basin. This diversion area is approximately 93.6 acres, and
also receives wastewater input from the Honeydew Lift Station. A capacity problem occurs
� between Manhole 13-230 and Manhole 13-387. This area could be diverted from the South
Highlands Basin into the North Highlands Basin through the re-routing of the existing sanitary
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sewers. This would alleviate some capacity problems within the South Highlands Basin. Table
III-4 aummarizes the sanitary aewer analysis for this diveraion area.
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MH 12-226 TO MH 12-226
�' The 24inch sanitary sewer pipe between Manholes 12-226 and 12-225 was constructed with a
slight adverse slope. The adverse sloped pipe section will be full-flowing at peak flows which
"�' will cause wastewater to backup into Manhole 12-226. However,no wastewater will backup in
Manhole 12-225 due to the steep pipe section located downstream. This gravity pipe section
� between Manholes 12-225 and 12-222 will create a super critical flow condition and not allow
wastewater to backup in Manhole 12-225.
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The total saturation flow in this section of the gravity sewer system is approximately 2,040
� GPM. At this flowrate, the total headloss in the 24" pipe section will be only 0.25 feet. With
this small headloss value, only a small amount of wastewater will backup in Manhole 12-226.
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There are no aidesewer connections into this adverse aloped pipe, s�eignificant problems wit�h
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this pipe section are anticipated except for the posaible accumulation of solids due to the
r�, inability to reach"carrying velocities." Flushing as part of routine maintenance will resolve the
solids accumulation problem.
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� LEGEND "�"`""E "�Z�°� ,°''� FIGURE 1
u�r sr�na� � N
NORTH F�QHLAND3 BA3W r�sxa �rd +�2a►d st � � � ` g SE 102�d st
� � ! � � � � �,o�ST CITY OF RENTON
� SOUTH HIC3HLAND3 BASW � ��''c� ' ---- --
--
DIVER310N AREA NE 2� � � 8 ���` ; ' ����sT SOUTH HIGHLANDS
0 �2� �� �� �� � . BASIN STUDY
� Nic►�+h � �
SEWER CAPACITY PROBLEMS � � ���A,� W �' �.�, � ! EXISTING SANITARY
, . _ _ . _ _ . . . . . . . . _, � _ � ; .
_ . . . _ . _ . _ . . _� � ' � � NE19�' SEWER SYSTEM
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m � .� ;
_ . . � . ' . . . . . . . . ' ' ' . ' . ' . ,,+�, � s�ST 'To ��S,g, I SCALE �FEET� DATE: APRIL 23.1990
. •• •• •• ;'� � � ' � � � 17th SCALE: 1' 1000'
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TABLE Iil-1: CAPACITY ANALYSIS FOR THE SOUTH HIGHLANDS SUBBASIN
SUMMARY�EXISTING SATURATION STATE
MAXIMUM INFILTRATION DOMESTIC ADDITIONAL AVERAGE WET PEAK WET CUMULATIVE PEAK
CAPACRY AREA AND INFLOW FLOW FLOW WEATHER FLOW WEATHER FLOW FLOW FIOW
MH NO [GPMJ IACj IGPD] [GPD� [GPMj (GPMJ (GPMJ [GPMJ RAT10
13-80 533.6 184.30 166.4 164.6 100.0 431.0 595.6 595.6 :';:::::';l:11��
13-61 460.7 6.88 62 5.5 11.8 17.3 612.9 `:::`:;::;'�:�:�t?1';
1352 463.8 2.65 2.4 2.1 4.5 6.7 619.6 <:::>:<'133;�
13-63 649.1 1.32 12 1.1 2.3 3.3 622.9 <::::>:::�iQ96
13-64 645.9 1.06 1.0 0.9 1.8 2J 625.6 '::;;:;;96:9°�v
13-65 775.7 3.94 3.6 32 6.7 9.9 635.5 `::<:>:81::996
12-41 843.6 1.85 1.7 1.5 32 4.7 640.1 <:>::::>:75:99�
12-d2 660.9 265 2.4 2.1 4.5 67 646.8 ;'<<::�7:9�0
12-d3 780.7 2.38 2.1 1.9 4.1 6.0 652.8 ....:::»::>:�33:fi96 '�
12�50 1178.5 2.38 2.1 1.9 4.1 6.0 703.4 ::::59,7'/0
12�1 480.1 0.79 0.7 0.6 1.4 2.0 705.4 -:"';::::::'l±�:�96
12�52 428.2 1.06 1.0 0.9 1.8 2.7 708.1 ...;[::'»:::7�:�°I'e
12�0 1291.8 0.50 0.5 0.4 0.9 1.3 709.3 54.9'/0
12-61 1681.8 0.50 0.5 0.4 0.9 1.3 710.6 :,:42.3'/0
12-118 8232 0.50 0.5 0.4 0.9 1.3 711.8 ...::`::::::::£i+5:�'�
12-119 2592.5 5.17 4.7 42 8.8 13.0 724.9 28.0%
12�7 2746.4 11.20 10.1 9.0 19.1 28.2 753.0 27.4%
12-25 29:i7.0 111.40 100.6 134.6 235.1 369.7 1122.7 38.2%
4 6 5 30 9°
12-22 3107.4 30.71 27.7 56.8 84.6 141.4 1271.6 40.9%
12-229 2589.3 0.86 0.8 1.7 2.4 4.1 1275.8 49.3%
12-228 3279.3 0.50 0.5 1.0 1.4 2.4 1278.1 39.09'0
12-227 3564.4 0.50 0.5 1.0 1.4 2.4 1280.5 ...........35,9%
12-226 0.0 64.05 57.8 64.5 142.4 226.9 1507.5 ;;:;;:::'::�;::
12-225 5796.6 9.70 8.8 6.7 15.5 222 1529.7 26.4%
12-222 2931.6 0.50 0.5 0.3 0.8 1.1 1530.8 52296
12-220 5067.6 0.50 0.5 0.3 0.8 1.1 1532.0 30.2%
12-219 4205.5 8.00 72 5.6 12.8 18.3 1550.3 36.9%
12-211 3835.4 58.98 53.2 108.0 1612 269.2 1821.1 47.5%
12-210 4196.6 13.16 11.9 18.2 30.1 48.3 1869.4 44.5�0
12-209 4289.3 10.98 9.9 8.9 18.8 27.6 1897.0 4429'0
12-208 4935.3 22.89 20.7 18.3 39.0 57.3 1954.3 39.6'/0
12-207 46.5G.0 7.26 6.6 5.9 12.4 18.3 1972.6 42.4%
12-205 2815�.1 4.57 4.1 1.9 6.0 7.9 1962.3 7.096
NOTE:SHADEDAF�E/1SAF�GF�ATERTHAN75%OFMAXIMUMCAPACffY
ERR=PIPE WITH ADVERSE SLOPE
1 1 � � [ � 1 ! 1 � 1 � 1 1 f � � 1 �
TABLE III-2: CAPACITY ANALYSIS FOR TNE SOUTH HIGHLANDS SUBBASW
SUMMARY OF EXISTING SATURATION STATE WITH CROWN POINTE ii
MAXIAAUM INRLTRATION DOMESTIC ADDITIONAL AVERAGE WET PEAK WET CUMULATIVE PEAK
CAPACITY AREA AND INFLOW FLOW FLOW WEATHER FLOW WEATHER FLOW FLOW FLOW
MH NO [GPMJ [AC] (GPD] [GPD] [GPMJ [GPNfJ [GPMJ [GPM] RATlO
13-60 533.6 184.30 166.4 164.6 1562 4872 651.8 651.8 �:�::'l22:�
13-61 4607 6.88 62 5.5 11.8 17.3 669.1 >::>:::3 d5:�°�0
13-62 463.8 265 2.4 2.1 4.5 6.7 675.8 >:::::;:::3�:796
13-63 649.1 1.32 12 1.1 2.3 3.3 679.1 >::::'!i�&9�
13-64 645.9 1.06 1.0 0.9 1.8 2.7 681.8 >:>:::;:::1t�:$'�S
1365 775.7 3.94 3.6 32 6.7 9.9 691.7 ;;:;:�9:2°6
12-41 843.6 1.85 1.7 1.5 32 4.7 696.3 '>::82:5%
12-42 660.9 2.65 2.4 2.1 4.5 6.7 703.0 :;:'::::>::'la5:zi96
12�43 780.7 2.38 2.1 1.9 4.1 6.0 709.0 ....;»:`s>:9Q:896
12-50 1178.5 238 2.1 1.9 4.1 6.0 759.6 ::64.5%
12-51 480.1 0.79 0.7 0.6 1.4 2.0 761.6 :::::::::::::�f�8;G9G
12-52 4282 1.06 1.0 0.9 1.8 2.7 764.3 ..::><:::>�7$:�'e
12-60 1291.8 0.50 0.5 0.4 0.9 1.3 765.5 59.3%
12-61 1681.8 0.50 0.5 0.4 0.9 1.3 766.8 45.6%
12-118 823.2 0.50 0.5 0.4 0.9 1.3 768.0 .. ::::::<:::;:+3�t:3°�e
12-119 2582.5 5.17 4.7 42 8.8 13.0 781.1 30.1%
12�7 2746.4 11.20 10.1 9.0 19.1 282 809.2 29.5%
12-25 29Gi7.0 111.40 100.6 134.6 235.1 369.7 1178.9 40.1%
- 4 5 6 186 4 40 0
12-22 3107.4 30.71 27.7 56.8 84.6 141.4 1327.8 427%
12-229 2589.3 0.86 0.8 1.7 2.4 4.1 1332.0 51.4%
12-228 3279.3 0.50 0.5 1.0 1.4 2.4 1334.3 40.7%
12-227 3564.4 0.50 0.5 1.0 1.4 2.4 1336.7 ....37,5yv
12-226 0.0 64.05 57.8 84.5 142.4 226.9 1563.7 ....;;:;;;;:;�;�:;;
12-225 5796.6 9.70 8.8 6.7 15.5 222 1585.9 27.4�0
12-222 2931.8 0.50 0.5 0.3 0.8 1.1 1587.0 54.1%
12-220 5067.6 0.50 0.5 0.3 0.8 1.1 1588.2 31.3%
12-219 4205.5 8.00 72 5.6 12.8 18.3 1606.5 38.2%
12-211 3835.4 56.98 53.2 108.0 1612 269.2 1877.3 48.9%
12-210 d196.6 13.16 11.9 182 30.1 48.3 1925.6 45.9%
12-209 428.9.3 10.98 9.9 8.9 18.8 27.6 19532 45.5%
12-208 49 i5.3 22.89 20.7 18.3 39.0 57.3 2010.5 40.7%
12-207 4656.0 726 6.6 5.9 12.4 18.3 2028.8 43.6%
12-205 28159.1 4.57 4.1 1.9 6.0 7.9 2006.7 72%
NOTE: SFIADED ARFJIS AFiE GREATER THAN 75%OF MAXIMUM CAPACITY
ERR=PIPE WITH ADVERSE SLOPE
/ � � � � � � � � �' � � � � � � � � �
TABLE III-3: CAPACITY ANALYSIS FOR THE NORTH HIGHLANDS SUBBASIN
SUMMARY OF EXISTING SATURATION STATE
MAXIMUM INFILTRATION DOMESTIC ADDITIONAL AVERAGE WE1' PEAK WET CUMULATIVE PEAK
CAPACtTY AREA AND INFLOW FLOW FLOW WEATHER FLOW WEATHER FLOW FLOW FLOW
MH NO [GPMJ [ACj [GPD] [GPD] [GPMJ [GPMJ [GPAAJ [GPMJ RATIO
1&97 1176.8 132.70 119.8 107.0 226.8 333.9 333.9 28.4�0
1396 1585.9 1.51 1.4 12 2.6 3.8 337.7 21.3%
13-55 1585.9 36.61 33.1 29.5 62.6 92.1 429.8 27.1%
13-54 1491.9 1.37 12 1.1 2.3 3.4 4332 29.0%
13-52 1358.4 284 2.6 2.3 4.9 7.1 440.4 32.4%
13-50 2613.3 3.44 3.1 2.8 5.9 8.7 449.1 172%
13-48 1342.7 3.56 32 2.9 6.1 9.0 458.0 34.1qo
12�3 3164.9 2.66 2.4 2.1 4.5 6.7 464.7 14.7'/a
12-56 328,9.0 217 2.0 1.8 3.7 5.5 4702 14.3%
12�9 41192 126 1.1 1.0 22 32 476.4 11.6%
12-88 14611.4 360.00 325.0 417.5 500 1242.5 1660.0 2136.5 14.6%
12-89 20438.9 0.30 0.3 02 0.5 0.8 2137.2 10.5%
12-117 4666.6 107.37 96.9 105.0 201.9 307.0 2444.2 52.4%
12-138 6561.3 0.57 0.5 0.5 0.5 2444.7 37.3%
12-138A 12453.4 7.92 72 6.4 13.5 19.9 2464.6 19.8%
12-137 3317.0 0.51 0.5 0.5 0.5 2465.1 74.3'/0
12-136 8874.2 0.78 0.7 0.7 0.7 2465.8 27.8%
12-135 3465.3 0.37 0.3 0.3 0.3 2466.1 712%
' 7.4 9
12-162 4980.9 0.37 0.3 0.3 0.3 2467.7 49.5%
12-161 4013.1 4.82 4.4 3.3 7.7 11.0 2478.8 61.8°�
12-160 52372 4.82 4.4 3.3 7.7 11.0 2489.8 47.59'0
12-159 3513.0 1.81 1.6 1.3 2.9 4.1 2494.0 71.0%
12-168 3819.8 4.91 4.4 3.4 7.8 11.3 25052 65.6%
12-17i0 3952.8 3.67 3.3 2.5 5.9 8.4 2513.6 63.6%
12-171 3824.3 2.30 2.1 1.6 3.7 5.3 2518.9 ...........65.9%4
12-172 2346.8 7.58 6.8 5.3 12.1 17.4 2536.3 ;;:;;i�B:'1'!;
12-179 30252 7.23 6.5 5.0 11.5 16.6 2552.8 :;<:;;;:8$i@°lo
- 4 5 ::>:`>:':':98:�'.
12-185 3440.0 7.46 6.7 19.3 26.0 45.3 3023.9 >::87;9?l;
12-196 3051.5 19.46 17.6 25.8 43.3 69.1 3093.0 >:::::#0'[:;d°lo
12-202 3544.5 2020 18.2 429 61.1 104.0 3197.0 >:::::::::<9Ei:�lo
NQTE: SHADED AF�AS ARE GI�EATER TNAN 75%OF MAXIMUM CAPACtTY
� 1 � i � t t ! � � ! � � � � � [ 1 �
TABLE ill-4: CAPACfTY ANALYSIS F�R POTENTIAL DIVERSION AREAS
SUMMARY OF EXISTING SATURATlON STATE
MAXIMUM INFILTAATIOM DOMESTIC ADDITIONAL AVERAGE WET PEAK WET CUMULATIVE PEAK
CAPACRY AREA AND INFLOW FLOW FLOW WEATHER FLOW WEATHER FLOW FLOW FLOW
MH NO [GPN� [AC] [GPD] [GPD] [GPMJ (GPMJ [GPMJ (GPMJ RATlO
13-239 964.4 1.15 1.Q 0.9 2.0 2.9 2.9 0.3%
1&238 9822 1.53 1.4 12 2.6 3.8 6.7 0.7%
t&237 4426 1.92 1.7 1.5 3.3 4.8 11.6 2.6%
t&236 587.9 0.58 0.5 0.5 1.0 1.5 13.0 2.2%
1&235 663.3 0.19 02 02 0.3 0.5 13.5 2.0%
13-233 441.8 3.83 3.5 3.1 6.5 9.6 23.1 52%
13-231 400.0 0.19 0.2 0.2 0.3 0.5 23.6 5.9'/0
13-232 400.0 1.15 1.0 0.9 2.0 2.9 26.5 6.6%
13-232A 400.0 0.96 0.9 0.8 1.6 2.4 28.9 7.2°!0
o i
13,366 993.8 1.80 1.6 0.8 2.4 3.1 312.6 31.5%
13385 1146.8 1.80 1.6 0.8 2.4 3.1 315.7 27.5%
13�84 1146.8 1.80 1.6 0.8 2.4 3.1 318.9 27.8%
13-383 904.8 1.52 1.4 12 2.6 3.8 322.7 35.7%
13-382 753.9 1.14 1.0 0.9 1.9 2.9 325.6 432%
13-377 1000.0 2.28 2.1 1.6 3.9 5.7 331.3 33.1%
�
�
�rr
CAAPTEft IV
�
PROPOSED SAI�TITAR.Y SEVPER,IMPROVEMENTS
�
� This Chapter discusses the proposed sanitary sewer improvements that would be neceasary to
accommodate the proposed Crown Point II development. These proposed improvements would correct
existing sanitary sewer capacity problems as well as providing additional sanitary sewer capacity
�
Sanitary Sewer Improvement Atternatives
"'�' The first capacity problem to be remedied involves the existing sanitary sewer on NE 7th Place
between Monroe Avenue NE and Olympia Avenue NE. The exiating gravity sewer can be either
�,,,; replaced or paralleled. The following is a detailed description of each of these alternatives.
�
A. Alternative 1 (NE 7th Place Capacity)
NE 7th Place Sewer R.eplacement
� This improvement requires a replacement of approximately 420 LF of existing 8"gravity sewer
between manhole 13-230 and manhole 13-387. This existing sewer is undersized to
� accommodate the area it is currently serving. The new gravity sewer would be constructed
with 12" gravity sewer pipe. The construction would require the reconnection of at least 27
�,,, side sewers. The construction of these improvements will require the diversion of wastewater
during the construction period.
�
B. Alternative 2 (NE 7th Place Capacity)
NE 6th Place Sewer Installation
�
This improvement would divert some wastewater flow around the problem area by
� constructing 440 LF of 8"gravity sewer from manhole 13-231 to manhole 13-387 along NE 6th
Place. The construction would require the reconnection of between 12 and 23 side sewers.
� However,there will be no need to divert wastewater during the construction period.
�
.,r
�r.
Two alternatives have been identified which will eliminate capacity problems in the South Highlands
�,,, Basin and accommodate wastewater from the proposed development. The first alternative is called
the South Highlands Interceptor R,eplacement. This improvement requires the replacement of
�rr
approximately 3,500 LF of existing 8"gravity aewer. The second alternative is called the Interbasin
�ansfer. This Interbasin Transfer is designed to make use of an existing under-utilized 12"gravity
sewer along NE 7th Street. The Interbasin Transfer alternative requires two separate improvements.
�` The first improvement is to install approximately 245 LF of gravity sewer along Index Place NE. The
second improvement involves construction and replacement of existing gravity sewer along NE 7th
�+ Street between the intersections with Aberdeen Avenue NE and Sunset Boulevard. The following is
a detailed description of each of these proposed improvementa:
�.
A Alteraative No. 1 (South Highlands Basin Capacity)
South Highlands Interceptor R.eplacement
�
This improvement requirea a replacement of approximately 3,500 LF of existing 8" gravity
"' sewer between manhole 13-60 and manhole 12-119. This existing interceptor is old and was
not sized to accommodate the area it is currently serving. The new interceptor would be
�. constructed with 12" and 15" gravity sewer pipe. The construction would require the
reconnection of numeroue side sewers. However, the existing 8" interceptor could remain in
� service until the new interceptor is completed which would minimize the need to divert
wastewater during the construction period.
�
B. Alternative No.2 (South Highland.a Basin Capacity)
Interbasin 7�ansfer
�
The proposed interbasin transfer requires two separate improvements. The first improvement
�,,, will divert wastewater from the South Highlands Basin to the North Highlanda Basin. In an
attempt to utilize the existing 12" gravity sewer on NE 7th Street. The second proposed
�
improvement will divert a portion of the wastewater of the North Highlands Basin into the
South Highlands Basin at the intersection of Sunset Boulevard NE.
� 1. Indez Place NE Imprnvements
"'�' This improvement will divert wastewater flow from a portion of the South Highlands
Basin to the North Highlands Basin through the construction of 245 LF of 8"gravity
�,,, sewer pipe along Index Place NE from manhole 13-377 to the existing sanitary sewer
�
�
�
on NE 7th Street. This conetruction will require the installation of a manhole within
�rr the existing sanitary sewer line on NE 7th Street between manhole 13-96 and 13-97.
The new invert in manhole 13-377 will be at an anticipated elevation of 313.90 feet.
�
The invert in the new manhole will need to match the existing pipe invert which will
be at an anticipated elevation of 311.50 feet. The slope of this new sanitary sewer will
be approximately 1% which will accommodate a maximum design flow of 540 gpm.
�
2. NE 7th Street Improvements
rr
This improvement would alleviate exieting eanitary sewer capacity problems and
�,,, divert wastewater flow from a portion of the North Highlands Basin back to the South
Highlands Basin. The first improvements would require replacing the existing
�
sanitary sewer along Aberdeen Avenue NE and NE 7th Street from manholes 12-51
to 12-119 in order to eliminate these capacity problems. Next, the wastewater flow
would be diverted from the North Highlands Basin to the South Highlsnds Basin by
`� installin a new manhole over the existin eani
g g tary aewer between manholes 12-88
and 12-59 and construction of a sewer to manhole 12-60. The construction of these
�rr improvements will require the diversion of wastewater during the construction period.
� Table IV-1 summarizes the capacity analysis for the South Highlands Interceptor with the
proposed interbasin transfers. This analysis illustrates that many of the capacity problems
are eliminated.
�
Conclusions and Recommentations
�
The Interbasin Transfer has a significant cost savings over replacing the existing South Highlands
�,,, Interceptor. For the NE ?th Place capacity problem, it appears that the N.E. 6th Place Alternative
may have some cost savings. However,further analysis may be necessary. Cost estimates have not
a�rr
been prepared eince that effort was not included within thie acope of work. Appendix B presents a
achematic drawing of each proposed improvement.
� Table IV-2 summarizes the capacity analysis for the same South Highlands Interceptor with the
addition of the proposed Crown Point II development. :�s can be seen from this analysis,no additional
� sewer aections are brought above capacity with the addition of the pmposed development. A summary
of the pipe replacement requirements for the Interbasin Transfer is presented below.
�r
�
r�r
�
ImDrovement Manhole From/To Sewer Len¢th Recommended Diameter/Slo�e
�
Index Place NE MH 13-377/13-96 245 LF 8"/1%
�
NE ?th Street MH 12-59/12-119 390 LF 12'Y7°k
NE 6th Place MH 13-231/13-387 440 LF 8"/1.3%
Aberdeen Avenue NE MH 12-51/12-60 300 LF 12"/0.8%
�
TOT� 1,375 LF
�
Figure IV-1 illustrates the length of sanitary sewer which would require replacement to accommodate
�„ a given increase in wastewater flows. This figure can be used to estimate how much existing sanitary
sewer system improvements would be necessary to accommodate a specific increase in wastewater flow
�
from proposed development in the South Highlands Basin. For example, the first 1,375 LF of sewer
replacement would accommodate an additiona159 GPM of wastewater. This figure does not take into
consideration any possible reductions in infiltration and inflow which might be accomplished through
"� a grouting program.
r
rr
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rrrr
arr
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�
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uFr sunar � N N
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NOFiTH FNC�iA1�S BA8N � r��►a �id ►�za►a sr � � � � st
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�� � ,� �, � � � SOUTH HIGHLANDS
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� 1 � � � 1 1 ! ! 1 � t � f � � 1 � �
TABLE IV-1: CAPACITY ANALYSIS FOR THE SOUTH HfGHLANDS SUBBASIN
SUMMARY OF PROPUSED DIVERSION
MAXIMUM INFILTRATiON DOMESTIC ADDITIONAL AVERAGE WET PEAK WET CUMULATIVE PEAK
CAPAC(fY AREA AND INFLOW FLOW FLOW WEATHER FLOW WEATHER FLOW FLOW FLOW
MH NO [GPMj [AC] [GPD] (GPD] [GPMJ (GPMJ [GPMJ [GPMJ RAT10
13-60 533.6 90.70 81.9 91.2 173.1 264.3 264.3 49.5%
13-61 46U.7 6.88 62 5.5 11.8 17.3 281.6 61.1%
13-62 463.6 265 2.4 2.1 4.5 6.7 288.3 62.2%
13-63 649.1 1.32 12 1.1 2.3 3.3 291.6 44.9%
13-64 645.9 1.06 1.0 0.9 1.8 2.7 294.3 45.6%
1365 775.7 3.94 3.6 32 6.7 9.9 3042 39.2%
12-d1 843.6 1.85 1.7 1.5 32 4.7 308.8 36.6%
12�2 660.9 265 2.4 2.1 4.5 6.7 315.5 47.7%
12�3 780.7 2.38 2.1 1.9 4.1 6.0 321.5 412%
12�50 1178.5 2.38 2.1 1.9 4.1 6.0 372.1 31.6%0
12-51 480.1 0.79 0.7 0.6 1.4 2.0 374.1 :::::;<::::�;7:9�6
12a2 4282 1.06 1.0 0.9 1.8 2.7 376.8 ';::::::$$:13°,�'0
12�0 1291.8 0.50 0.5 0.4 807.7 808.6 809.0 1185.7 ....»::>:<::91::89�e
:::,.
12-61 1681.8 0.50 0.5 0.4 0.9 1.3 1187.0 70.6�l0
.................
12-118 8232 0.50 0.5 0.4 0.9 1.3 11882 ;::::::::'t4+t:�°�
12-119 2592.5 5.17 4.7 42 8.8 13.0 1201.3 46.3%
12�7 2746.4 11.20 10.1 9.0 19.1 282 1229.4 44.8%
12-25 2937.0 111.40 100.6 134.6 235.1 369.7 1599.1 54.49'0
8 9 7 5 606 5.4°0
12-22 3107.4 30.71 27.7 56.8 84.6 141.4 1748.0 56.3%
12-229 2589.3 0.86 0.8 1.7 2.4 4.1 17522 67.7%
12-228 3279.3 0.50 0.5 1.0 1.4 2.4 1754.6 53.5%
12-227 3564.4 0.50 0.5 1.0 1.4 2.4 1756.9 .....49,3%Q
12-226 0.0 64.05 57.8 84.5 142.4 226.9 198,3.9 ....:::[;:::::>:�1�i�::::
12-715 5796.6 9.70 8.8 6.7 15.5 222 2006.1 34.6%
12-222 2931.8 0.50 0.5 0.3 0.8 1.1 20072 68.5%
12-220 5067.6 0.50 0.5 0.3 0.8 1.1 2008.4 39.6%
12-219 4205.5 8.00 7.2 5.6 12.8 18.3 2026.7 48.2% '
12-211 3835.4 58.98 53.2 108.0 1612 2692 2297.5 59.9% I'
12-210 4196.6 13.16 11.9 182 30.1 48.3 2345.8 55.9%
12-209 428.9.3 10.98 9.9 8.9 18.8 27.6 2373.4 55.3%
12-208 4935.3 22.89 20.7 18.3 39.0 57.3 2430.7 49.3%
12-207 4656.0 726 6.6 5.9 124 18.3 2449.0 52.6%
12-205 2815�� 4.57 4.1 1.9 6.0 7.9 2456.9 8.796
NOTE: SHADED AFiEAS ARE GF�ATER THAN 75%OF MAXIMUM CAPACITY
ERR=PIPE WITH ADVERSE SLOPE
! t ! � t l 1 � t � � 1 1 t t � � � t
TABLE IV-2: CAPACITY ANALYSIS FOR TNE SOUTH HIGHLANDS SUBBASIN
SUMMARY OF PROPOSED DNERSION PLUS CROWN POINTE II
MAXIMUM INFILTRATION DOMESTIC ADDITIONAL AVERAGE WET PEAK WET CUMULATIVE PEAK
CAPACITY AREA AND INFLOW FLOW FLOW WEATHER FLOW WEATHER FLOW FLOW FLOW
MH NO [GPMJ [AC] [GPDJ (GPD] [GPM� (GPMJ [GPM� [GPMJ RAT10
1360 533.6 90.70 81.9 91.2 56.2 229.3 320.5 320.5 60.1%
1361 460.7 6.88 62 5.5 11.8 17.3 337.8 73.3%
13-62 463.8 2.65 2.4 2.1 4.5 6.7 344.5 74.3%
13-63 649.1 1.32 12 1.1 2.3 3.3 347.8 53.6%
13-64 645.9 1.06 1.0 0.9 1.8 2.7 350.5 54.3%
13�Fi5 775.7 3.94 3.& 3.2 6.7 9.9 360.4 46.5%
12-41 843.6 1.85 1.7 1.5 3.2 4.7 365.0 43.3%
12-d2 660.9 2.65 2.4 2.1 4.5 6.7 371.7 56.2%
12�l3 780.7 2.38 2.1 1.9 4.1 6.0 377.7 48.4%
12�0 1178.5 2.38 2.1 1.9 4.1 6.0 428.3 36.3%a
1251 480.1 0.79 OJ 0.6 1.4 2.0 430.3 ;::::»:83;b'y?6
12-52 4282 t.06 1.0 0.9 1.8 2.7 433.0 �:�:;<;:;'TlJ1::l��
12�0 1291.8 0.50 0.5 0.4 807.7 808.6 809.0 1241.9 ....:::<;";�6<t�6
12�1 1681.8 0.50 0.5 0.4 0.9 1.3 12432 J3.9%
12-118 8232 0.50 0.5 0.4 0.9 1.3 1244.4 ...::>::>:::::'f5�_:�'�
12-119 2592.5 5.17 47 42 8.8 13.0 1257.5 48.5% i
12-67 2746.4 11.20 10.1 9.0 19.1 282 1285.6 46.8% I
12-25 2937.0 111.40 100.6 134.6 235.1 369.7 1655.3 56.4%
- 4. 19 6 5 66 5 .3%
12-22 3107.4 30.71 27.7 56.8 84.6 141.4 1804.2 56.1'/0
12-229 2589.3 0.86 0.8 1.7 2.4 4.1 1808.4 69.8%
12-228 3279.3 0.50 0.5 1.0 1.4 2.4 1810.8 55.2%
12-227 3564.4 0.50 0.5 1.0 1.4 2.4 1813.1 50.9%
t2-226 0.0 64.05 57.8 84.5 142.4 226.9 2040.1 ..;:::[:::::��:::
12-225 5796.6 9.70 8.8 6.7 15.5 22.2 2062.3 35.6%
12-222 2931.8 0.50 0.5 0.3 0.8 1.1 2063.4 70.4'/0
12-220 5067.6 0.50 0.5 0.3 0.8 1.1 2064.6 40.7%
12-219 4205.5 8.00 72 5.6 12.8 18.3 2082.9 49.5%
- 0 1
12-211 3835.4 58.98 53.2 108.0 1612 2692 2353.7 61.4%
12-210 4196.6 13.16 11.9 182 30.1 48.3 2402.0 57.2%
12-209 428.9.3 10.96 9.9 8.9 18.8 27.6 2429.6 56.6%
12-208 49Ci5.3 22.89 20.7 18.3 39.0 57.3 2486.9 50.4�0
12-207 4656.0 7.26 6.6 5.9 12.4 18.3 25052 53.8qo
12-205 28159.1 4.57 4.1 1.9 6.0 7.9 2513.1 8.9%
NOTE: SHADED AF�J1.S ARE GREATER THAN 79%OF MAXIMUM CAPAC(TY
ERR=PIPE WITH ADVERSE SLOPE
1 f � i f � � ! 1 � t I 1 1 � i I � �
FIGURE IV-1: SOUTH HIGHLANDS BASIN
IMPROVEMENTS ANALYSIS
LENC�TH OF INCREASE IN
SEWER MAIN AVAILABLE
REPLACEMENT CAPACITY
---------• •------------------------------------------------------------------------- --------------
1375 LF 59 GPM
1575 64 �
1825 136 �
2075 180
2325 190
2725 195
' 3025 264
� ---------• 3425 277 •------------------------------------------------------------------------- --------------
�- 3625 324
�} 3875 512
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LENGTH OF SEWER MAIN REPLACEMENT[LF�
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APPENDIX A
,� SCOPE OF WORK
�.
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ATTAC��iMENT A
BCOPE OF WORK
�
� I. STUDY AR,EA I1WE8TIGATION
A. Identify the study area boundaries which will include all existing sanitary sewer
,.� which might be impacted by the proposed development.
B. Consider existing land use within the study area including a visual inventory of
�„ existing development.
C. Estimate immediate future development potential based on existing zoning.
�" II. PROPOSED DEVELOPMENT EVALUATION
A, Document proposed land use for the Crown Point II Development. This will
�"' include number and type of apartment units as well as related on-site services
such as laundry facilities.
.w B. Estimate the number of equivalent dwelling units (EDU's) this proposed
development represents.
�,,, C. Calculate the wastewater flowrates that can be expected from this proposed
development based on City and State engineering criteria.
..
III. SANITARY SEWER HYDRAULIC ANALYSIS
A. Evaluate the effects of wastewater flow from the proposed development on the
existing sanitary sewer system at saturation development. This task will be
'"` accomplished using the Cit�s computer model of the existing sanitary sewer
system.
� B. ' Identify capacity problem areas in the existing sanitary sewer system as a result
of development.
.� C. Identify alternatives solutions for each problem area.
D. Detail each alternative solution.
�
E. Estimate material quantities for each alternative solution. Polygon 2000, Inc.,
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�
�
will be responsible for estimating costs for each alternative solution.
�
IV. REPORT PREPAR.ATION
�,,, A. Provide a figure showing the study area boundaries, the proposed development,
and the existing sanitary sewer aystem. Problem areas in the sanitary sewer
system ahall be highlighted on this figure. The Cit�s AutoCAD drawing of the
� sanitary sewer system shall be used to develop this figure.
B. All findings shall be documented in a report. Ten copies of this report shall be
�
printed of which four will be distributed to Polygon 2000, Inc.
V. COORDINATION MEETINGB
�
A. Attend a meeting between representatives from Polygon 2000,Inc., and the City
of Renton before analysis begins in order to discuss the details regarding the
�r proposed Crown Point II Development.
B. Present findings from the engineering investigation to representative of Polygon
�,,, 2000, Inc., at the completion of the study.
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APPENDIX B
�
FIGURE 3: N.E. 6TH PLACE IlVIPROVEMENT
�
FIGURE 4: INDEX PLACE N.E. IMPROVEMENT
�
FIGURE b: N.E. 7TH STREET IlVIPROVEMENT
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LEGEND
�x�srn� s�Rs
�oPosm s�s —— — ———
SCALE: 1" = 100'
8� 13-387 8" 13-388 g°� 13-389
o ' NE 7 th
� PLACE
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� ; NE 6th PLACE
� � 13—232 13—231
� � - - - -- - - -- - - ---•�- -- - -- - - - - - - - --
g" 8>,
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8" 8,�
FIGURE 3
8�,
CITY OF RENTON
SOUTH HIGHLANDS NE 6th STREET
BASIN STUDY
NE 6TH PLACE
IMPROVEMENT 8��
SCALE FEET APRIL 27, 1990
0 25 50 100 CP2FIG3.DWG
t 1 � � � � � � t � 1 1 � 1 � t l � �
LEGEND
EXISTING SEWERS �
PROPOSED 3EWER3 � � � �� �
W -���
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12 13-96 , �
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8" a 13—377 ,�r� �
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FIGURE 4 � �
CITY OF RENTON d
SOUTH HIGHLANDS � � �
BASIN STUDY �
INDEX PLACE NE � �
IMPROVEMENT � �
SCALE FEET) APRIL 27, 1990 L J H-r-{
L`J
0 25 5Q 1Q0 CP2FlG4.DWG
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LEGEND 8..
EXISTING SEWERS �
W 8»
PROPosEv sEWERs — — — — —— w
Q o w -NE 8 th
rx � ST REET
,Z�� 2'" � w
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12„ 2�,.
�rL' 12„ 12-88 ,�
12-118 �i'�
12-61
12-119 12-60 12�� 12-59 ,
i -N-�' '� �2
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,2-52 �, NE
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� LACE
� 12-51 8"
FIGURE 5 a
CITY OF RENTON
SOUTH HIGHLANDS dj
BASIN STUDY �'�
NE 7TH STREET �
IMPROVEMENT
SCALE (FEET APRIL 27, 1990 � SCALE: 1�� _ �OO�
0 25 50 100 CP2FIG5.DWG �
�..1�.,�- � 7 � �
June 15; 1992 Renton Citv Council Minutes Paae 262
� Utility: Polygon 2000, Referred 3/9/92 - Utilities Committee Chairman Tanner presented a
Crown Point II, NE report stating that the Committee recommends concurrence in the staff
6th Pl., Sanitary recommendation that a sanitary sewer moratorium exemption granted to
Sewer Exemption the development known as Crown Point II, NE 6th Place, be extended to
(UC-007-90� inciude the 4.98-acre lot, identified as Tax Lot #092305-9047. This
�� recommendation is based on the following conditions:
1) The total flow from the development on the site shall not exceed 37.4
GPM (domestic) or 153 multi-family units.
2) The total domestic flow (37.4 GPM) will be divided among lots 2, 3,
4, and A. If the developer(s) do not utilize all lots, the remaining
undeveloped property will have an ezemption for no more than the
remaining balance of the flow (if any). No development of the
remaining lots (if any) will be allowed beyond the balance of the
flow (if any) without further Council exemptions.
3) Multi-family units and single-family units do not produce equal
flows. The domestic flows (GPM) shall be the primary determining
factor.
4) Nothing in this recommendation shall supersede, replace, or void the
requirements set forth in City Code, the moratorium (Resolution No.
2764), or the original exemption.
MOVED BY TANNER, SECONDED BY EDWARDS, COUNCIL ADOPT
THE COMMITTEE REPORT. CARRIED.
Latecomer Agreement: Referred 5/4/92 - Utilities Committee Chairman Tanner presented a
Little, Maple Ave. report stating that the Committee concurs with the recommendation of the
NW, Fire Public Works Department, and recommends Council approve the Little
Hydrant/Watermain latecomer agreement and assessment roll for water improvements in Maple
(LA-002-92) Avenue NW, South of vacated NW 3rd Place. The Committee
recommends preliminary approval be granted for a period of two (2)
years.
Per City of Renton Ordinance No. 4189, the Committee recommends
Council set the duration of the agreement to be ten (10) yeaFs with the
option to extend the agreement, for one time only, for a period of up to
an additional five (5) years.
The Committee recommends Council authorize the City Clerk to notify
the property owners listed on the preliminary assessment roll by registered
mail of their rights and options to participate in the latecomer agreement.
The Committee further recommends that if no protests are received,
Council authorize the Public Works Department to prepare the final
assessment roll and the latecomer agreement for execut�on by the
developer and City officials. Upon payment of the �200.00 processing
fee by the developers the City Clerk is authorized to record the final
agreement with King County.
MOVED BY TANNER, SECONDED BY STREDICKE, COUNCIL
CONCUR IN THE COMMITTEE REPORT. CARRIED.
�,,, ;� RECEIVED
. .
� � � � ��
RENTUN C!TY COUNClL
CITY OF RENTON
���.��-%Z-Q-�y�- �-
MEM � RANDUM � ` Y' -�-� � _ �-rL�
��� �,.���,��
_ �,��',-�
��� .
DATE: May 19, 1992
T0: Jesse Tanner, Chair
Members of Ut�lities Committee
VIA: Mayor Clymer �
FROM: Gu ann, Administrator
lanning/ ilding/Public Works Department
STAFF CONTACT: Mike Ben�t, Wastewater Utility
SUBJECT: Sanitary Sewer Service for Crown Point II
Re: Moratorium Exemption
BACKGROUND:
At the Council Meeting of June 4, 1990, the Renton City Council granted an
exemption for Crown Point II. This exemption aliows for the construction of 153
multi-family units or the equivalent of 37.4 gallons per minute (GPM) of domestic flow.
Crown Point II's developers have obtained the rights to another parcei of land (Lot A)
that is approximately five acres in size. They would like to include this parcel in their
development and have requested that the exemption be extended to include that
parcel without increasing the number of units.
DISCUSSION:
The exemption to the moratorium is a matter of capacity which is a factor of units not
acreage. Adding more land or changing the shape by exchanging parcels will have no
effect on capacity provided the total number of units is within the approved range.
RECOMMENDATIQN:
Staff recommends that the exemption granted to the development known as Crown
Point ii be extended to include the 4.98 acre lot, identified as Tax Lot #092305-9047.
This recommendaticn is based on the following conditions:
1) 7he total fiow from the development on the site shall not exceed 37.4 GPM
(domestic) or 1 53 multi-family units.
� ,�p����
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_ ry �,, 1"-;�� � t�!
. . . � 6-/�'- 9� �/.
- UTILITIES COMMITTEE . "
COMMITTEE REPORT
June 15, 1992
CROWN POINT II, NE 6TH PL. SANITARY SEWER MORATORIUM EXEMPTION
(Referred 3/9/92)
The Utilities Committee recommends concurrence in the staff recommendation that
the exemption granted to the development known as Crown Point II be extended to include
the 4.98 acre lot, identified as Tax Lot #092305-9047. This recommendation is based on
the following conditions:
1) The total flow from the development on the site shall not exceed 37.4 GPM
(domestic) or 153 multi-family units.
2) The total domestic flow (37.4 GPM) will be divided among lots 1 , 3, 4, & A. If the
developer(s) do not utilize all lots, the remaining undeveloped property will have an
exemption for no more than the remaining balance of the flow (if any). No
development of the remaining lots (if any) will be allowed beyond the balance of the
flow (if any) without further Council exemptions.
3) Multi-family units and single family units do not produce equal flows. The domestic
flows (GPM) shall be the primary determining factor.
4) Nothing in this recommendation shall supersede, rep�ace, or void the requirements
set forth in City code, the moratorium (Resolution No. 2764) or the original
exemption.
sse Tanner, Chair
�� �
��
Bob Edwards, Vice Chair
0
imothy J. S tzer, Member
UCR•CRWN/MAB:If
cc: Gregg Zimmerman
Mike Benoit
Jesse Tanner, Chair "`'�'` �
� �embers of Utilities Committee
� May 15, 1992
Page 2
2) The total domestic fiow (37.4 GPM) wiil be divided among lots 1 , 3, 4, & A. If
the developer(s) do not utilize all lots, the remaining undeveloped property wilf
have an exemption for no more than the remaining balance of the flow (if any).
No development of the remaining lots (if any) will be allowed beyond the
balance of the flow (if any) without further Council exemptions.
3) Multi-family units and single family units do not produce equai flows. The
domestic flows (GPM) shall be the primary determining factor.
4) Nothing in this recommendation shail supersede, replace, or void the
requirements set forth in City code, the moratorium (Resolution 2764? or the
original exemption.
CRWNII/MAB:It
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�% ;���� "'�'" CITY �F RENTON
� ����
'— -� � Finance Department
Earl Clymer, Mayor
June 7, 1990
Mr. Gary Youngs
Polygon 2000, Inc.
4030 Lake Washington Boulevard NE, Suite 201
Kirkland, WA 98033
Re: Sewer Service for Polygon Crown Point II Project and the RH2 Investigation of
Facility Improvements for the South Highlands Sanitary Sewer Basin
Dear Mr. Youngs:
At the regular Council meeting of June 4, 1990, the Renton City Council adopted the
recommendation of the Utilities Committee to approve the referenced request. The
recommended improvements include the construction of approximately 1,375 lineal feet
of sanitary sewer to provide additional capacity for the development of the Crown Point
II project and expand sewer capacity within the South Highlands Basin.
If additional information is required, please do not hesitate to call.
Sincerely,
`_ ii� /
���L��,�
Marilyn J t rsen, CMC
City Clerk
235-2502
cc: Mayor Earl Clymer
Council President Nancy Mathews
Lynn Guttmann, Public Works Director
Dick Anderson, Utility Systems Manager
200 Mill Avenue South - Renton, Washington 98055
� �
app�o���
UTILITIES COMMITTEE
COMMITTEE REPORT
June 4, 1990
POLYGON 2000, INC. REQUEST FOR SEWER SERVICE IN MORATORIUM AREA
(Referred 5/14/90)
The Utilities Committee recommends concurrence with the Public Works Department's
recommendation that Polygon 2000, Inc. be allowed to proceed with the sanitary sewer system
improvements recommended by RH2 Engineering in their report (The Engineering Investigation for
Facility Improvements for the South Highlands Sanitary Sewer Basin, April, 1990). The
recommended improvements include the construction of approximately 1,375 lineal feet of sanitary
sewer. These improvements to the existing sanitary sewer system will eliminate capacity problems
within the South Highlands Basin and provide additional capacity for the development of the
proposed Crown Point II Project.
� --
_ �
�..�..Ye--�r� ��---�`��_-�rf��_
Toni Nelson, Chair
����c��.�rc-�.i — (�J�lS(�-�Y�../
Kathy olker-Wheeler, Vice Chair
�-..`.�
���j�� ��-1:�� YL_._�'�-----�--____...,.
�
�esse Tanner, Member
UCPOLYGN/MAB:If
i
/j;C , G - • �,:/ ,� ;!,IrL.�!G(�
C. _ % ._ ;.
��./ !',� ��'' 4�!_C. 'G'�-�
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���_; . � ;
. . PU.i3 W RkS
June 4. 1990 '"�Renton Citv Council Minutes � PaQe 172
ADMINISTRATIVE Referred 5/7/90 - Council inquiry regarding growth issues related to the 1%
REPORT real estate excise tax. Memorandum from Sam Chastain, Park
King County: 1% Real Superintendent, stated that the suburban cities would be eligible to compete
Estate Excise Tax for funding in two of the three funding categories, Urban Acquisition and
Stewardship and 114iaintenance. The Regional Acquisition would be solely
controlled by the King County Open Space Committee for acquiring regional
facilities or land. Local aget�cies would be allowed to submit acquisition and
facilities proposals for consideration by this committee. He stated advantages
of the proposed tax plan would be (1) opportunity to increase the
presentation of Open Space on a regional and local basis; (2) provision of a
funding source for specialized maintenance and rehabilitation of parks, trails,
natural zones, etc; (3) inclusion of a sunset clause; and (4) exemption of the
first $125,000 of the purchase price of a home. Disadvantages would be (1)
fairness issue of imposition of a new tax on people who purchase real estate,
especially should the exemption clause not be placed on the tax; (2) new or
higher fees and taxes in the future; (3) possible adverse impact on any future
bond issue by the City.
Space Needs: City Hall Referred 5/14/90 - Inquiry from Mark Niemi, 23512 - 264th Avenue SE,
Parking Maple Valley, regarding Renton Public Library parking. Letter from Mayor
Clymer to Mr. Niemi stated that the problem is currently being studied by
the City Parking Lot Committee. He noted that the designation of an
additional 34 parking stalls for public use only in the Library parking lot
should be adequate parking for Renton residents using the Library. Mr.
Niemi was reminded that if he parks in alternate locations, he should be
aware of the current posted parking limits and expected changes during the
summer recreation season.
Rezone: Good Shepherd Referred 5/14/90 - Council inquiry regarding question of church/state issue
Group Home (NE 19th with the Good Shepherd Group Home: Memorandum from Ken Nyberg,
Street) R-010-88 Community Development Director, stated that the issue has not been resolved
and the Housing and Human Services Citizens Advisory Committee has
requested that the status of this project be discussed with Mr. Ed Ball,
President of Good Shepherd Home, and other concerned board members as
well as HUD, King County and Bellevue.
Annexation: North Soos Referred 5/14/90 - Council inquiry regarding consultant selection panel for
Creek (Fairwood) North Soos Creek project. Memorandum from Ken Nyberg, Director of
Community Development, named the following as the consultant team for the
public information program: Bernadene Dochnahl, Renton Advisory
Committee; Meg Meier, North Soos Creek Citizens Advisory Board; Randy
Berg, Parks Department; Rebecca Lind, Community Development
Department; and Fred Fortine, Community Development Department. The
selection panel for the North Renton Arterial Facilitation Project includes
Lynn Guttmann, Gary Norris, and Mel Wilson from the Public Works
Department.
Public Works; NE 6th Referred 5/14/90 - Council inquiry regarding NE 6th Street as access to
Street, Crown Point II apartment complex. Memorandum from Mayor Clymer via Lynn Guttmann,
Public Works Director, stated that NE 6th Street only has a 30 foot right-of-
way from 90 feet west of Queen Avenue NE to Union Avenue NE because.
the existing north 30 feet right-of-way was dedicated when the property was
platted. Even though the 30 feet is unacceptable, it is all the City has at the
present time until the south one-half is developed or platted, at which time
the developers of Crown Point II will be required to dedicate an additional 30
feet.
Executive Session MOVED BY MATHEWS, SECONDED BY ZIMMERMAN, COUNCIL
CONVENE INTO EXECUTIVE SESSION TO DISCUSS LITIGATION
ISSUES. CARRIED. Time 11:47 p.m.
ADJOURNMENT Council reconvened into regular session; roll was called; all members were
present. MOVED BY MATHEWS, SECONDED BY NELSON, COUNCIL
ADJOURN THE MEETING. CARRIED. Time 12:36 a.m.
`Ci� .��7�G�2/
MARILYN . P RSEN, CMC, City Clerk
Recorder: Sandra Wales
06/04/90
� �
t� �{� _ ' �F�
; �,;
MAY 2 9 19�
CTTY OF RENTON Fi�IV I UIV �i i r �OUNCIL
M E M 0 R A N D U M
DATE: May 24, 1990
T0: Councilman Stredicke
FROM: Mayor Clymer
VIA: Lynn Gt�tina n
SUB.TECT: N.E. 6TH STREET R�W
In answer to your question why N.E. 6th Street only has a 30 foot right of way, from 90
feet west of Queen Avenue N.E. to Union Avenue N.L., we researched the matter and
Found that the existing North 30 feet of right-of-way was dedicated when the property was
platted (President Park No. 4, President Park No. 3, and President Park).
As to whether or not 30 feet of right-of-way is acceptable with all the new apartment
construction in that area, t}le answer is no; however, it is all the City has at the present
time until the south one-half is developed or platted, at which time they (developers) will
be required to dedicate an additional 30 feet.
PMP
June 4, 1990 ��.rrRenton Citv Council Minutes � Pa�e 172
ADMINISTRATIVE Referred 5/7/90 - Council inquiry regarding growth issues related to the 1%
REPORT real estate excise tax. Memorandum from Sam Chastain, Park
King County: 1% Real Superintendent, stated that the suburban cities would be eligible to compete
Estate Excise Tax for funding in two of the three funding categories, Urban Acquisition and
Stewardship and Maintenance. The Regional Acquisition would be solely
controlled by the King County Open Space Committee for acquiring regional
facilities or land. Local agencies would be allowed to submit acquisition and
facilities proposals for consideration by this committee. He stated advantages
of the proposed tax plan would be (1) opportunity to increase the
presentation of Open Space on a regional and local basis; (2) provision of a
funding source for specialized maintenance and rehabilitation of parks, trails,
natural zones, etc; (3) inclusion of a sunset clause; and (4) exemption of the
first $125,000 of the purchase price of a home. Disadvantages would be (1)
fairness issue of imposition of a new tax on people who purchase real estate,
especially should the exemption clause not be placed on the tax; (2) new or
higher fees and taxes in the future; (3) possible adverse impact on any future
bond issue by the City.
Space Needs: City Hall Referred S/14/90 - Inquiry from Mark Niemi, 23512 - 264th Avenue SE,
Parking Maple Valley, regarding Renton Public Library parking. Letter from Mayor
Clymer to Mr. Niemi stated that the problem is currently being studied by
the City Parking Lot Committee. He noted that the designation of an
additional 34 parking stalls for public use only in the Library parking lot
should be adequate parking for Renton residents using the Library. Mr.
Niemi was reminded that if he parks in alternate locations, he should be
aware of the current posted parking limits and expected changes during the
summer recreation season.
Rezone: Good Shepherd Referred 5/14/90 - Council inquiry regarding question of church/state issue
Group Home (NE 19th with the Good Shepherd Group Home: Memorandum from Ken Nyberg,
Street) R-010-88 Community Development Director, stated that the issue has not been resolved
and the Housing and Human Services Citizens Advisory Committee has
requested that the status of this project be discussed with Mr. Ed Ball,
President of Good Shepherd Home, and other concerned board members as
well as HUD, King County and Bellevue.
Annexation: North Soos Referred 5/14/90 - Council inquiry regarding consultant selection panel for
Creek (Fairwood) North Soos Creek project. Memorandum from Ken Nyberg, Director of
Community Development, named the following as the consultant team for the
public information program: Bernadene Dochnahl, Renton Advisory
Committee; Meg Meier, North Soos Creek Citizens Advisory Board; Randy
Berg, Parks Department; Rebecca Lind, Community Development
Department; and Fred Fortine, Community Development Department. The
selection panel for the North Renton Arterial Facilitation Project includes
Lynn Guttmann, Gary Norris, and Mel Wilson from the Public Works
Department.
Public Works: NE 6th Referred S/14/90 - Council inquiry regarding NE 6th Street as access to
Street, Crown Point II apartment complex. Memorandum from Mayor Clymer via Lynn Guttmann,
Public Works Director, stated that NE 6th Street only has a 30 foot right-of-
way from 90 feet west of Queen Avenue NE to Union Avenue NE because
the existing north 30 feet right-of-way was dedicated when the property was
platted. Even though the 30 feet is unacceptable, it is all the City has at the
present time until the south one-half is developed or platted, at which time
the developers of Crown Point II will be required to dedicate an additional 30
feet.
Executive Session MOVED BY MATHEWS, SECONDED BY ZIMMERMAN, COUNCIL
CONVENE INTO EXECUTIVE SESSION TO DISCUSS LITIGATION
ISSUES. CARRIED. Time 11:47 p.m.
ADJOURNMENT Council reconvened into regular session; roll was called; all members were
present. MOVED BY MATHEWS, SECONDED BY NELSON, COUNCIL
ADJOURN THE MEETING. CARRIED. Time 12:36 a.m.
`Ci'0 J ;c��G��c/
MARILYN . P RSEN, CMC, City Clerk
Recorder: Sandra Wales
06/04/90
t�� .
� �
f1�rv _ ' � �' '
, I' e �� v
�1,qY 2 9 199(1
CITY 0� RENTON ri��v I U�v ��! r �;OUNCIL
M � 1vI0RAND. UM
DATE: May 24, 1990
Tn: Councilman Stredicke
FROM: Mayor Clymer
VIA: Lynn Gt�t3na n
SUT3JECT: N.E. 5TH STREET R�W
In answer to your question why N.E. 6th Street only has a 30 foot right of way, from 90
feet west of Queen Avenue N.E. to Union Avenue N.L., we researched the matter and
Cound that the existing North 30 feet of right-of-way was dedicated when the property wzs
platted (President Park No. 4, President Park No. 3, and President Park).
As to whether or not 30 feet of right-of-way is acceptable with all the new apartment
coilstruction in that area, tfle answer is no; however, it is all the City has at the present
time until the south one-half is developed or platted, at which time they (developers) will
be required to dedicate an additional 30 feet.
P�iP
June 4. 1990 �Renton itv Council Minutes � Pa�e 171
Utility: South Highlands Utilities Committee Chairman Nelson presented a report recommending
Sanitary Sewer Basin, concurrence with the Public Works Department's recommendation that
Polygon Development Polygon 2000, Inc. be allowed to proceed with the sanitary sewer system
Crown Point II improvements recommended by RH2 Engineering in their report (The
Engineering Investigation for Facility Improvements for the South Highlands
Sanitary Sewer Basin, April, 1990). The recommended improvements include
the construction of approximately 1,375 lineal feet of sanitary sewer. These
improvements to the existing sanitary sewer system will eliminate capacity
problems within the South Highlands Basin and provide additional capacity
for the development of the proposed Crown Point II Project. MOVED BY
NELSON, SECONDED BY STREDICKE, COUNCIL CONCUR IN THE
COMMITTEE REPORT.*
Councilman Stredicke questioned the status of a report on the sewer
moratorium project to date. Richard Anderson, Utility Systems Manager,
responded that staff is currently preparing a status report on the sewer
moratorium for Council along with a comprehensive sewer plan to be
presented at a later date. *MOTION CARRIED.
Release of Easement: Utilities Committee Chairman Nelson presented a report recommending
Gourley, SW 12th and SW concurrence with the recommendation of the Board of Public Works that City
13th, RE-001-90 Council approve the release of easement for portion of vacated alley located
between SW 12th and SW 13th adjacent to Lind Avenue SW, described in
Ordinance # 3346. The Committee also recommended concurrence with the
recommendation of the Board of Public Works that City Council determine
the classification of the subject easement be Class B, which states:
Class B: All City of Renton easements for which no public funds have
been expended in the acquisition, improvement or maintenance of same
or easements originally dedicated or otherwise conveyed to the City by
the present petitioner for the release of said easement for which no
public expenditures have been made in the acquisition, improvement or
maintenance thereof.
Therefore, if Council determines the easement classification to be Class
B, the City shall receive no further compensation other than the
easement release filing fee which has been paid, and the processing fee
which is now due and payable.
The Committee further recommended Council authorize the Mavor and Citv
Clerk to execute the release of easement document and that the City Clerk
record the document with King County. MOVED BY NELSON, SECONDED
BY KEOLKER-WHEELER, COUNCIL CONCUR IN THE COMMITTEE
REPORT. CARRIED.
ORDINANCES AND RESOLUTIONS
Ways and Means Ways and Means Committee Chairman Keolker-Wheeler presented the
Committee following ordinance for first reading:
Public Works: Utility An ordinance was read amending section 8-1-9(B)4 of Title VIII (Health and
Rate Ordinance Sanitation) of City Code by combining subsections (3) and (4). MOVED BY
KEOLKER-WHEELER, SECONDED BY EDWARDS, COUNCIL REFER
THIS ORDINANCE BACK TO WAYS AND MEANS COMMITTEE FOR
ONE WEEK. CARRIED.
Ways and Means Committee Chairman Keolker-Wheeler presented the
following resolution for reading and adoption:
Resolution #2799 A resolution was read authorizing the Mavor and Citv Clerk to execute an
Amendment to Metro amendment to the sewage disposal contract with Municipality of Metropolitan
Sewage Disposal Seattle (Metro). MOVED BY KEOLKER-WHEELER, SECONDED BY
Agreement EDWARDS, COUNCIL ADOPT THE RESOLUTION AS PRESENTED.
CARRIED.
NEW BUSINESS Council President Mathews thanked the Police Department for submitting to
Police: Press Release the Council members a copy of the press release regarding the homicide
which occurred in Renton over the weekend.
Police: Animal Control Councilwoman Keolker-Wheeler expressed concern regarding the policy for
lost animals picked up by Animal Control. She recommended a reporting
mechanism possibly using the cable TV to assist people in locating their lost
pets.
�, .� apPG�C�'�L��
UTILITIES COMMITTEE
COMMITTEE REPORT
June 4, 1990
POLYGON 2000, INC. REQUEST FOR SEWER SERVICE IN MORATORIUM AREA
(Referred 5/14/90)
The Utilities Committee recommends concurrence with the Public Works Department's
recommendation that Polygon 2000, Inc. be allowed to proceed with the sanitary sewer system
improvements recommended by RH2 Engineering in their report (The Engineering Investigation for
Facility Improvements for the South Highlands Sanitary Sewer Basin, April, 1990). The
recommended improvements include the construction of approximately 1,375 lineal feet of sanitary
sewer. These improvements to the existing sanitary sewer system will eliminate capacity problems
within the South Highlands Basin and provide additional capacity for the development of the
proposed Crown Point II Project.
/ �_.. �
�-�! �-� �--�'';��c'�-�_
Toni Nelson, Chair
�C����-��, - (�.J
Kathy olker-Wheeler, Vice Chair
- �1
� �--Qf--►,..�.�� Q --__
1�-�...-
esse Tanner, Member
UCPOLYGN/MAB:If
. �
,
��S ;_L G.� : ��,�%:: 's.. . ���'`��l'� ;��C�.cCG(�
��/ � � ��i;; ��,i.a, �c..N/
. l '/`�t: -./,ii' ,i ,c.r 7".
i.
` Mav 14 I990 enton Citv Council Minutes Pa�e 144
�
Appointment: Library Mayor Clymer reappointed Phillip Beckley, 655 Ferndale Court NE, Renton,
Board to the Library Board for a second five-year term effective to June 1, 1995.
MOVED BY MATHEWS, SECONDED BY STREDICKE, COUNCIL
CONCUR IN THE MAYOR'S REAPPOINTMENTS TO THE PARK BOARD
AND LIBRARY BOARD. CARRIED.
CORRESPONDENCE A letter was read from Gary Youngs, Polygon 2000, Inc., 4030 Lake
Utility: South Highlands Washington Boulevard NE, Suite 201, Kirkland, requesting approval of the
Sanitary Sewer Basin, sanitary sewer facility improvements in the South Highlands Sanitary Sewer
Polygon Development Basin identified as Alternatives No. 2. Alternative No. 2, NE 6th Place
Crown Point I Sewer Installation, and Alternative No. 2., Interbasin Transfer will cause
• minimal disruption to traffic and homeowners, and reduce the amount of
sewer pipe installed. The letter also requested approval to proceed with
/ building permit application for the Polygon Crown Point II property, 11.6
acres located in the S00 block of Union Avenue NE, and referenced a
provision of the sewer moratorium which allows for exemption of the
property from the moratorium provided that additional capacity can be
provided by making interim improvements. MOVED BY MATHEWS,
SECONDED BY STREDICKE, COUNCIL REFER CORRESPONDENCE TO
UTILITIES COMMITTEE. CARRIED. Council requested that staff provide
the Utilities Committee with information relative to the requirements already
placed on 6th Place and whether or not a half street access to an apartment
complex is proper.
OLD BUSINESS Regarding the sewer moratorium, Councilman Stredicke asked for a status
Public Works: Sewer report and recommendation to determine whether the City's purpose has been
Moratorium met.
Utilities Committee Utilities Committee Chairman Nelson presented a report recommending
Release of Easement: concurrence with the Board of Public Works to release a portion of sanitary
Renton Village sewer easement AF6631804 and water easement AF6631805 and accept the
Association, Grady Way, new water and sewer easements provided and executed by Renton Village
RE 002-88 Associates. The Committee further recommended Council authorize the
Mavor and Citv Clerk to execute both partial release of easement documents
and that these two documents be recorded before the new City easement is
executed. MOVED BY NELSON, SECONDED BY TANNER, COUNCIL
CONCUR IN THE COMMITTEE REPORT. CARRIED.
Public Works: Local Utilities Committee Chairman Nelson presented a report recommending
Hazardous Waste concurrence with the Public Works/Solid Waste Utility staff recommendations
Management Plan to approve the Local Hazardous Waste Management Plan which is a King
County regional plan for the collection of hazardous wastes from residential
households and small quantity generators (SQG). This plan fulfills the State
of Washington RCW 70.105.220 requirements that each city develop a local
hazardous waste management plan or enter into an agreement with the
County to develop a joint city/county plan. It provides for the establishment
of a variety of comprehensive collection and educational programs for
households and small businesses. In order to address concerns about the
projected yearly cost increases and the lack of direct control by the suburban
cities over the fee setting process, the Utilities Committee recommends
concurrence with the Public Works/Solid Waste Utility staff recommendations
to approve the addended Local Hazardous Waste Management Plan for King
County with the following contingencies added: (1) The Management
Committee shall be five members, one each from King County, City of
Seattle, Seattle/King County Health Department, Metro, and Suburban Cities
Association; (2) The Management Committee shall unanimously agree to each
proposed annul plan and budget; (3) The Management Committee shall
unanimously approve the evaluation criteria, design, reports, and strategy as
referenced in Chapter 3. The Committee further recommended referral of
the resolution of approval with contingencies to the Wavs and Means
Committee. MOVED BY NELSON, SECONDED BY TANNER, COUNCIL
CONCUR IN THE COMMITTEE REPORT.* Upon Council inquiry,
Committee Chairman Nelson responded that Renton is not the only city to
add contingencies to the plan. Council President Mathews noted that at the
Suburban Cities Association meeting, the recommendation was made for all
cities to study the amendments to the Local Hazardous Waste Management
Plan and adopt appropriate resolutions. *MOTION CARRIED.
Councilwoman Keolker-Wheeler thanked city staff, especially Attorney
Zanetta Fontes and Solid Waste Coordinator Joan Griffes, for performing
quickly and admirably in putting this plan together to be submitted to other
jurisdictions for their review.
. ' .►
�% �= r � CITY,,,�F RENTON
..�
— =;� Finance Department
Earl Clymer, Mayor
May 15, 1990
Mr. Gary Youngs
Senior Vice President
Polygon 2000, Inc.
4030 Lake Washington Boulevard NE, Suite 201
Kirkland, WA 98033
Re: Request from Polygon 2000, Inc. for Crown Point II Sanitary Sewer Service and
Building Permit for Apartment Development, NE 6th Place and Union Avenue NE
Dear Mr Youngs:
The referenced correspondence, received by this office on May 8, 1990, was referred to
the Council's Utilities Committee at the Renton City Council meeting of May 14, 1990.
You will be contacted by the Council secretary when the matter is scheduled to be
reviewed by the committee.
Please feel free to call if additional information is required.
Sincerely
/i o / .
Marilyn J. Pe ersen, CMC
City Clerk
235-2502
cc: Mayor Earl Clymer
Council President Nancy Mathews
Public Works Director Lynn Guttmann
Mike Benoit, Senior Engineering Specialist
200 Mill Avenue South - Renton, Washington 98055
/ i
i
" � ���� C,( .
`�Ilr' �Y
�
Polygon 2000, Inc.
May 4, 1990 C�Q� ���'�N
;:;�;r � t990 �
Mayor Earl Clymer RE���V'�[�
City of Renton CITY CLER�K'S OFFICE
200 Mill Avenue South
Renton, WA 98055
RE: Sanitary Sewer Service for the Polygon Crown Point II Property and the RH2 Investigation
of Faciliry Improvements for the South Highlands Sanitary Sewer Basin Dated April, 1990
Dear Mayor Clymer:
Pursuant to the Polygon 2000, Inc. Agreement with the City of Renton regarding the study of
sewer service for the Polygon Crown Point II property, we are formally requesting that the City of
Renton approve the Sanitary Sewer facility improvements in the South Highlands Sanitary Sewer
Basin identified as Alternatives Number 2 in the above referenced report prepared for the City of
Renton by RH2 Engineering.
The reasons for adopting Alternative Nunlber 2 N.E. 6th Place Sewer Installation and Alternative
Number 2 Interbasin Transfer are outlined as foliows:
1. Alternatives Number 2 will cause minimal disruption to traffie and minimal impact
on homeowners as compared to Alternative Number 1 which involves laying almost
three times as znuch sewer pipe, 3500 lineal feet vs. 1300 linear feet, which would
result in three times the impact on traffic and homeowners.
2. Both alternatives achieve the same result in terms of capacity provided.
3. Alternatives Number 2 are less costly.
4. RH2 Engineering recommends Aiternative Number 2 N.E. Gth Place Se�ver
Installation and Alternative Number 2 Interbasin Transfer.
We are also requesting permission to proceed with a building permit application for the Polygon
Crown Paint II property. Resolution 2764, regarding sewer service in the South Highlands Basin
adopted July 17, 1989, provides under Section III for the possibility of exemption of the Crown
Point II property from the Sewer Moratorium provided that additional capacity can be provided
by making interim improvements. The above referenced study identifies the specific
" improvements that will be made to provide the additional sewer capacity required to bwld the
Crown Point II project.
We are pleased with the results of the study in that we will be able to make improvements to the
existing sanitary sewer system which will provide all of the capacity that is required for the
development of our property plus creating additional capacity. We have not needed to absorb
any of the existing capacity that was identified as existing capac�ty in Resolution 2764.
, � .. i,.; � � . , ._ �i ,�:;. , � � � � � ��,,,i .,.{ .
. . �.�1 i'�:I,IfJi�l:t . i� �:I !1 .�'li;Ill�;;Il ..�,�
�'f . . . .li !• �' � � .�'1'.�:II� �'��' , `�i��.lf�!� � �
- , � '.1 ' i('"•�
�
�
Mayor Earl Clymer
May 4, 1990
Page 2
In addition, the Crown Point II property wil] be paying for 100% of the costs of making the
improvements for the sewer system which would be required to enable the development of tlle •
Polygon property. We understand that Polygon may apply to City Council for a latecomer
agreement to recover the costs of providing any remaining capacity created by Polygon
improvements that are used to service properties other than the Polygon Crown Point II property.
In conclusion we look forward to receiving Council approval of Altez-native Number 2 N.E. 6tli
Place Sewer Installation and Alternative Number 2 Interbasin Transfer and approval of Polygon
Crown Point II permit processing to proceed since the Polygon property has met the exception
requirements under Resolution 2764.
We are readily available to respond to any questions.
Sincerely,
� ,
� � ,.' �
Gary A. You g %�
Senior Vice President
GAY:mgt
ce: Michael A. Benoit; City of Renton
Rick Harbert; RH2
Mark Semrau; RH2
!
: � 9, a.
�� �
Polygon 2000, Inc.
May 4, 1990 a����,N
;_;�r � t990
Mayor Earl Clymer RE��IVED
City of Renton CITY Cl.ERK'S QFFlCE
200 Mill Avenue South
Renton, WA 98055
RE: Sanitary Sewer Service for the Polygon Crown Point II Property and the RH2 Investigation
of Facility Improvements for the South Highlands Sanitary Sewer Basin Dated April, 1990
Dear Mayor Clymer:
Pursuant to the Polygon 2000, Inc. Agreement with the City of Renton regarding the study of
sewer service for the Polygon Crown Point II property, we are formally requesting that the City of
Renton approve the Sanitary Sewer facility improvements in the South Highlands Sanitary Sewer
Basin identified as Alternatives Number 2 in the above referenced report prepared for the City of �,
Renton by RH2 Engineering.
The reasons for adopting Alternative Number 2 N.E. 6th Place Sewer Installation and Alternative
Number 2 Interbasin Transfer are outlined as follows:
1. Alternatives Number 2 will cause minimal disruption to traffic and minimal impact
on homeowners as compared to Alternative Number 1 which involves laying almost
three times as much sewer pipe, 35001ineal feet vs. 1300 linear feet, which would
result in three times the impact on traffic and homeowners.
2. Both alternatives achieve the same result in terms of capacity provided.
3. Alternatives Number 2 are less costly.
4. RH2 Engineering recommends Alternative Number 2 N.E. 6th Place Sewer
Installation and Alternative Number 2 Interbasin Transfer.
We are also requesting permission to proceed with a building permit application for the Polygon
Crown Point II property. Resolution 2764, regarding sewer service in the South Highlands Basin
adopted July 17, 1989, provides under Section III for the possibility of exemption of the Crown
Point II �roperty from the Sewer Moratorium provided that additional capacity can be provided
by makmg interim improvements. The above referenced study identifies the specific
improvements that will be made to provide the additional sewer capacity required to build the
Crown Point II project.
We are pleased with the results of the study in that we will be able to make improvements to the
existing sanitary sewer system which will provide all of the capacity that is required for the
development of our property plus creating additional capacity. We have not needed to absorb
any of the existing capacity that was identified as existing capacity in Resolution 2764.
�i� � �' ��^� , _, � I il'�. � ��.ii!Ill�� Il ��,�),�.)
i -r �
�-�-/�'a - ,
o ��.,�E�%�lC�u.cu-�c. ��'�,Q
, �.� �
r
�
• � �
Mayor Earl Clymer
May 4, 1990
Page 2
In addition, the Crown Point II property will be paying for 100% of the costs of making the
improvements for the sewer system which would be required to enable the development of the
Polygon property. We understand that Polygon may apply to City Council for a latecomer
agreement to recover the costs of providing any remammg capacity created by Polygon
improvements that are used to service properties other than the Polygon Crown Point II property.
In conclusion we look forward to receiving Council approval of Alternative Number 2 N.E. 6th
Place Sewer Installation and Alternative Number 2 Interbasin Transfer and approval of Polygon
Crown Point II permit processing to proceed since the Polygon property has met the exception
requirements under Resolution 2764.
We are readily available to respond to any questions.
Sincerely,
./'` �
( �
Gary A. You g `
Senior Vice President
GAY:mgt
cc: Michael A. Benoit; City of Renton
Rick Harbert; RH2
Mark Semrau; RH2