HomeMy WebLinkAboutSWP272206(4) i S V R
1 D E S I G N C 0 M P A N Y
Civil Engineering
Planning N4 L F( L
Landscape Architecture O y
911 Western Ave
1 Suite 302
Seattle,WA 98104 '
Phone 206.223.0326 . u D 0 Rti G Nj/A L
Fax 206.223.0125
TDD800,133.6364 Hydraulic Deport
Principals: Nelson Place NW/Rainier Avenue North
Maureen A.Kwolek,PE
Peg Staeheli,ALA
Schrader . Storm System Replacement
1 Tom von ,PE
John W.Rundall,PE
Prepared for:
i
The City of Renton
Renton, Washington
1
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IpNAL
1
EXPIRES 7_�jam+ L
1
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Prepared by:
1 SvR Design Company
911 Western Avenue, #302
1 Seattle, WA 98104
1 August 12, 1994, Revised March 3, 1995
SvR No. 93037
1
S v_ R
D E S I G N C O M P A N Y
' INTRODUCTION
The purpose of the Nelson Place NW/Rainier Ave. North Storm System Replacement Project is
' to replace the damaged 18-inch storm line in Nelson Place. The project will also replace the
: existing 8- and 12-inch storm lines in Rainier Avenue that are in poor condition (see Figure 1).
The damaged 18-inch storm line is partially located on two parcels of private property. The
Surface Water Utility decided to abandon the damaged 18-inch storm line and locate a
replacement storm line in City right-of-way. The purpose of this report is to analyze the drainage
basin for storm water runoff, and design the replacement system to convey the existing peak flow
and the potential future peak flow from the developed drainage basin.
' EXISTING STORM WATER CONVEYANCE SYSTEM
The drainage basin for the project is 18 acres in size and was determined by defining the area
' upstream of the existing catch basin at the corner of Nelson Place NW and Rainier Avenue (see
Figure 2). The land use adjacent to Rainier Avenue consists of commercial buildings and parking
lots with a 2%to 4% slope. The study area slopes uphill to the west with slopes as steep as 15% -
' 20%. The land use to the west is primarily single family with few areas of multi-family . The
single family is zoned for a maximum of eight dwelling units per acre. The densities of the single
family units observed in the field were less than this maximum.
' A 12-inch and an 18-inch concrete storm water line enter the existing catch basin at the corner of
' Nelson Place NW and Rainier Avenue. The 12-inch concrete line runs 350 feet north along
Rainier Avenue to its terminus. The 12-inch line was inspected with a crawler mounted television
camera and found to be in poor condition. There were multiple offset joints and a some "bellys"
' or sags where standing water collects.
The 18-inch concrete line leaves Rainier Ave N and crosses under Nelson Place NW onto private
' property at the corner of Rainier Ave and NW 3rd Place (Bruce Cass office building parking lot).
This 18-inch line was also inspected by a City crew with a television camera and the line was
found to be in poor condition with broken and partially collapsing sections of pipe. In the office
building parking lot the storm system goes through an 18 -inch pipe and two 48-inch brick catch
basins. A 12-inch concrete pipe comes into other northern catch basin from the northwest and
carries flow from the majority of the upstream system.
The 12-inch line on the south side of NW 3rd Place curves under the sidewalk and into the office
building parking lot,but is mostly within the NW 3rd Place right-of-way. The 12-inch line carries
' flow from the upstream drainage system, which primarily consists of a 12-inch concrete trunk
line with round 48-inch brick catch basins. Part of the upstream drainage system, especially in
the single family zones, consists of open ditches that drain to the trunkline.
' Accordingto the Surface Water Utility there is no history of flooding in the drainage basin
Y rY g g
identified for this report.
' Revised:March 3, 1995 1 Nelson Place NW/Rainier Ave. N.-Hydraulic Report
1
1
CITY OF RENTON, WASHINGTON
Nelson Place NW / Rainier Ave. N.
Storm System Replacement
' FIGURE #1
1 12 RD L '_
-�e anaa _q
z
n
un-a
S ST w
u,cru �
u.1/ -J
6 uc7t S7
6
1 5 ST
-34
vn-1
y co -" uo- �
-� 5T
ti
r
a
y
9 I 3 of
0
T
Q ¢
z
a
in 11 _ AREA ANALYZED
NW 4TH ST 3 I N 4T I ST
3
NW 3RD L
' W 3R T Z
a
Z ¢ M v
N FT� Qv
' VICINITY MAP
S _v R
' D E S I G N C 0 M P A N Y
1
CITY OF R
N, HI
N
Nelson Place NW. / Rainier Ave. N. N
Storm System Replacement
FIGURE #2
............... ........... .....
r- 7-\ r 200 0 100 200 400
C)
i �� BA24-3;
.............. :;u
.......... ......
:: \ I D SCALE: 1" 200
X
...................
Fri -. ................ ...
L 4..............
... ..... ..
41
BA. 7 I
. .........
-A rrj
... ....................
.. . .............
1BA214'............. . ..............
. ........ . . ...... .... ....
........... ...
............... - - - - - - - - -
.......... ...... - - - - -- - - - - -
................. ...
.......... ...... - -- - - -
..1 - - r .............
NVV
... ...... . .........
E. ................ ............. - - - -- - - -
... .................... ........ ...... - - - - - - - -
..............
.... ........... ...............
.......... .. ............ .. ..
.. .BAS20
............ ...... - - - - - - - - -
. .............
BA206
.. ........... - - - - - - - - -
........... ........ .................... - - - - - -
BA217
......... - -- - - - - --
......................... .. ......
.............. ............I......
..... ... ........ .....................
7
......... ...... - - - - - - - - - -- LEGEND
-77 - ---- - - - - - BA201
.. .. ...................... ... ..
. .......................
... ... ..... ..... .... .
......................... .
0:.,
.. .......BA2 BA200 SUB BASIN t
.. ............=........ .. .
F-71 ...................... .. ..
................... ....
.. .. .. ............
........ BA200
.. . .
SINGLE FAMILY
FT-1 I y
L
FT-i
F7 =7
MULTI FAMILY
COMMERCIAL
PATH TO
ESTIMATEUSED TIME
V OF CONCENTRATION
D E S I G N C '0 M P A N y
S u R
' D E S I G N C 0 M P A N Y
PROPOSED STORM WATER CONVEYANCE SYSTEM
The Nelson Place NW/Rainier Avenue North Storm Sewer Replacement project proposes to
reroute the flow coming down NW 3rd Place into a new system and to eliminate the 18-inch
concrete line under Nelson Place NW. The existing eight and 12-inch concrete line in Rainier
Avenue North of NW 3rd Place will also be replaced with a new 12-inch line.
All of the round brick manholes within the area of improvement will be replaced by new Type 2
catchbasins.
HYDROLOGIC/HYDRAULIC MODELING
' Rational Method
' The rational method was used to model the projected flows from a full build out condition in the
subbasin upstream from the proposed project. The rational method is outlined in the King County
Surface Water Design Manual as the preferred method for analyzing and sizing conveyance
elements for small drainage subbasins.
The following is the Rational Method equation used:
Q25
= CI25 A
' where:
Q25 = peak flow (cfs) for a storm of peak rainfall intensity z� " of a 25-year
return frequency storm.
C = estimated runoff coefficient (ratio of rainfall that becomes runoff.
' I25 = peak rainfall intensity (inches/hour) for a 25-year return frequency storm.
A drainage subbasin area (acres).
' The 25-year return frequency storm was used as required by the King County Surface Water
Design Manual for conveyance systems.
The other parameters were determined as follows:
C - The runoff coefficient or "C-value" is a factor based on the type of land cover that
' can be related to the land use. The C-values were estimated for each subbasin
based on the maximum land cover density allowed by zoning for the subbasin. The
C-values for the individual subbasins are summarized in Table 1.
' Revised:March 3, 1995 4 Nelson Place NW/Rainier Ave. N.-Hydraulic Report
City of Renton
Nelson Place NW/Rainier Avenue North
Storm Sewer Replacement
Table 1, Drainage Subbasin Characteristics
7/29/94-Revised 3/3/95
SvR#93037
Subbasin Contributing Contributing Contributing Land use "C" Value*
to Area... Area Area
' (sq. ft acre
BA200 SDCB001 24,165 0.55 Commercial 0.85
BA201 SDCB002 9,332 0.21 Commercial 0.85
BA202 SDCB003 22,286 0.51 Commercial 0.85
BA203 (NOT USED)
' BA204 SDCB004 53,274 1.22 Single Family 0.70
BA205 SCB205 36,227 0.83 Single Family 0.70
BA206 SCB206 81,669 1.87 Single Family 0.70
' BA207 (NOT USED)
BA208 SCB208 70,292 1.61 Single Family 0.70
BA209 SCB209 81,985 1.88 Single Family 0.70
' BA210 SCB210 49,286 1.13 Single Family 0.70
BA211 (NOT USED)
' BA212 (NOT USED)
BA213 SCB213 65,843 1.51 Single Family 0.70
BA214 SCB214 77,915 1.79 Single Family 0.70
' BA215 SCB215 88,907 2.04 Multi-Family 0.80
BA216 SCB216 53,394 1.23 Multi-Family 0.80
BA217 SDCB005 20,836 0.48 _ Commercial 0.85
BA218 SCB218 32,723 0.75 Commercial 0.85
* For rational method
S v_ R
D E S I G N C 0 M P A N Y
Note: The C values are based on the potential full build out conditions. The
values used are conservative compared to the existing conditions. The design of
' the proposed storm drain will accommodate future increases in peak-rate runoff
I25 - The peak rainfall intensity is determined using the following equation:
125 — P25125
where:
P25 - is the total precipitation for the 24-hour design storm for a 25-year
' return frequency.
i25 - a unit peak rainfall intensity factor based on the time of
' concentration (T,) in minutes.
The time of concentration for a sub-basin is the time it takes runoff to travel
overland from the most hydraulically distant location in the subbasin to the point
of discharge. The time of concentration for each subbasln was estimated using 1"
' = 200' scale topographic maps. The path of travel is shown in Figure 2 and the
flow segment characteristics are listed in each drainage area summary.
' The study area was determined as the area tributary to the proposed drainage system. The
subbasins were delineated using topographic and existing storm drainage system information
gathered from maps, field notes and photographs. The upstream system was modeled using a
simplified version of the actual system. Only structures at major changes in alignment were
considered. The drainage subbasins are shown in Figure 2.
' Backwater Analysis
The 25-year design flows in the system were determined using the rational method with the
' Seattle/Renton Intensity - Duration - Frequency (IDF) rainfall curve using CIA software by
Engenious Systems. CIA was then used to do a backwater analysis to determine the hydraulic
gradeline computation for the flows in the system.
' CIA considers pipe material and the geometry of the system to determine the hydraulic g radeline
under pressure flow.
' The locations of the structures were approximated using information from the it 's storm
drainage inventory and field observation. The coordinates of the structures were determined using
the approximate locations in Autocad. The inverts were taken from the following: the field survey
by TCA, Inc., the City of Renton storm drainage inventory, or by an approximation based on
' topography and field observations. The system model is shown in Figure 3. The hydraulic
' Revised:March 3, 1995 6 Nelson Place NW/Rainier Ave.N.-Hydraulic Report
N
CITY OF RENTON, WASHINGTON
Nelson Place NW. / Rainier Ave. N. N
1 Storm System Replacement
' FIGURE #3
Fri
_ f .._. ._... y 3y---. — ._-� SC8213 200 0 100 200 400
Fri
U) > I P215
r i ! BA213 �� CB212 I D SCALE: 1" = 200'
...n I
I � . scB211 Z
SCB214 D 16 f,l
P220 = I SCB210 SCB216
Y_.� _ _. .
v� I BA214 ` _
ISCB2081, I �� P218 I If<
P202 I SCB207 I
P201
SCB20 BA216 ! Z
eA210 P222
_ - _. .... SC821
NW 4 T H ST I N$'V I 4T>•--i ST 1 P 10 i
' I I P203 I
BA208 I I i BA218 DCBOGS
BAS209 I ! BA206 ( BA215 I
I SCB206 I P204 _. P105
P223
7 �. t eA217
I I `N JRD �' -l02 I I DC6002
- - - -- — j
-
BA205 I I
' - BA204
BA202 P 10..E
DCB004 , '
�� I I I SC8205 ;� __. .__ __ __ _ ..� �
' Fri I A2oo �
P205 P 100 J DCB023
SDC8001 LEGEND
P 199
' FT-1 Qv BA200 SUB BASIN #
0� SDC619 CBS200 CATCH BASIN #
P214 PIPE #
S V R
D E S I G N C 0 M P A N Y
t
1
CITY OF RENTON, WASHINGTON
1 Nelson Place NW. / Rainier Ave. N. N
1
Storm System Replacement ti
FIGURE #3
SCB213 M O 200 0 100 200 400
U) ! \ P215
ma \
' I 's ` C8212 D SCALE: 1" = 200'
I
z
SC6211 Z
SCB214 ` - - _ D2 16 D217
I , P220 c I SCB210 SCB216
BL11 SC6208 I \ P218 I I <
P202 ! \ SCB207
I \ P20
I I I
SC820 BA21 o P222 BA216 ! Z
I
I \
—. ...,_ _. _ . _ SC621 DCB006
' NW 4TH ST I NON I - _ I _
I 4TH ST I P10`
! P203— I BA21 s _
`1 I BA208 I DCB005
BAS209 BA206 ( BA215 I
I ! SCB206 I P204 _ I P105
' — - — - I P223 BA21 7
I I I N 3RD102 I DC8002
I BA205 t
BA204
r 1I I DCB004 , eA2o2 P103
—j
A200
.� P205 P100 ` j DCB003
1
sDCe001 LEGEND
d
' P 199
M Qv BA200 SUB BASIN #
r' OZ SDC819 CBS200 CATCH BASIN #
P214 PIPE #
S v R
D E S I G N C 0 M P A N Y
S v_ R
' D E S I G N C O M P A N Y
gradeline calculation results are summarized in Table 2.
' RESULTS AND RECOMMENDATIONS
The results of the analysis showed that during the peak flow for the 25-year return frequency
' storm a number of existing structures will be surcharged. The model requires a 24-inch line in
Rainier Avenue and 18-inch concrete pipes going up NW 3rd Place in order to avoid surcharging
the proposed system. The proposed improvements are shown in Figure 4.
The Surface Water Utility has not received any reports of flooding in the existing system. The
peak flows predicted by the model are higher than the existing flows in the drainage system for the
following reasons:
1) The conservative nature of the rational method tends to overestimate peak flows..
2) The model is based on full developed conditions which would generated more storm
Y P
water runoff than the existing conditions.
' The system will be constructed
proposed y ted to accommodate the potential future increase 1n flows.
' Given the expense and effort of this project, the additional cost due to an increase in pipe size is
negligible.
Based on the findings of this study the City will upgrade the existing 12-inch concrete line in NW
3rd Place to an 18-inch concrete pipe and relocating it completely into the street. This will allow
the storm drain line to be entirely within,the public right of way. It will also eliminate the awkward
alignment where the existing system leaves the public right of way and enters the Bruce Cass office
' building parking lot adjacent to NW 3rd Place.
' Revised: March 3, 1995 8 Nelson Place NW/Rainier Ave. N.-Hydraulic Report
City of Renton
tNelson Place NW/Rainier Avenue North
Storm Sewer Replacement
tTable 2, Hydraulic Gradeline Summary
7/29/94-Revised 3/3/95
SvR#93037
' Structure Structure Pipe 25 Year Headwater CB Rim
From To Peak Flow Elevation Elevation
' cfs ft ft
SCB 199 42.00
' SDCB001 SCB199 P199 24.76 42.52 47.82
SDCB002 SDCB001 P103 24.11 45.64 50.94
SDCB002 46.10
SDCB005 SDCB002 P105 2.78 47.34 52.16
SDCB006 SDCB006 P101 1.72 51.00 53.37
SDCB002 45.64
SDCB003 SDCB002 P102 21.83 46.07 51.77
' SDCB004 SDCB003 P100 21.08 62.62 66.24
SDCB004 64.26
SCB215 SDCB004 P223 5.81 65.99 68.00
' SCB216 SCB215 P222 2.29 67.02 75.00
SDCB004 62.62
1 SCB205 D B 0 S C 0 4 P205
SCB206 SC B205 P204
SCB207 SC B206 P203
SCB207 102.10
B210 SCB
207 B207 P218
t SCB217 SCB210 D217 5.17 DITCH FLOW
SCB216 SCB217 D216 2.47 DITCH FLOW
SCB213 SCB212 P215 2.48 122.03 126.33
' SCB207 102.10
SCB208 SCB207 P202 4.91 127.22 132.00
SCB209 SCB208 P201 2.70 171.33 179.00
Shaded areas indicate structure surcharge. Hydraulic gradeline is automatically
' adjusted to 0.10 ft above structure rim.
CITY OF RENTON, WASHINGTON 40 0 20 40 80
N
NELSON PLACE NW / RAINIER AVE. N SCALE: '- = 40'
EXISTING LEGEND
STORM SYSTEM REPLACEMENT PROJECT REMOVE EX. INLET 11 IRE HYDRANT PHONE RISER
STA. 11�47.7, 32'RT 0 IRRlcn n GAS VALVE CD cns VALVE
> �` & 6 SD TO MANHOLE FIRE DEPARTMENT CONNECT CAS METER
8+00 3 (16, Ez-,, FIGURE #4 s� __ - x WATER METER CAURD POST
WATER VALVE FENCE AS NOTED
' 9+00 ' ---- Js 12}00 STORM GRAIN MAN HOLE DECIDUOUS FEE
10+00 n 11+�0
\ � \., � STORM GRAIN CATCH B451N
\ (6'P' \ "'� J Q SANITARY SEWER MANHOLE -G CAS PAINT MARK
REMOVE 12bLF EX. 6" CONIC. SO E- ELECTRIC PAINT MARK
\ � --- O SANITARY SEWER CLEANOUT
a -\ B93 �� 2 b _TV- CABLE TELEVISION PAINT MARK
Ttt'� 3 C6 /5 1 2 02 \ RAINIER AVE\ (,J ^ C 6 R1\ L SIG MOUNTED TRANSFORMER
� _ _ k' E/�* ) ® SIGNAL VAULT -SD- STORM DRAIN PAINT MARK
--- __-_- 3 CB P ELECTRIC VAULT 5 SPOT ELEVATION AT FLOW UNE
ss- f� - ---- ----- - R EX, 12 CONIC. SD
+50 ]
--- h'S -- 12V--L� 1 " -- / i- - - 9 -- 9y'6�� VAULT(UNOE IFRMINED UPUTY) (F) FLOW LINE OF CUTTER(TYP)TOP
52.65 F - F LSD _ (C� OF CURB IS 6•HIGHER UNLESS
E , POWER TRANSFORMER ON GONG.PAD DTHERWISE NOTED
---- ® -- -�- , _ IJ GHT (A) ASPHALT ELEVATION A7 FACE OF
-12•D F c. ' TV----- ' ` /• _ X( S_ 1 I'll, TRAFFIC ISLAND
...fL f 12..DI W - _ -12 So. B [ €)= �.- - _ - - - 4 -,UBUUT BOX
m� L I2"01 W
® 2}y � -6'sss CB 9 ( 3 'z PLUG ENC. NW.
�� LUG AB NDON C yo G�°�10 PLUG EX. T13" CONIC. Nw. PROPOSED LEGEND
CI R N7- -3- QXIST. PVC MBE. tin y°h PLI tT�L68� 0 \ REM M. DI SD \
113 LF 12" SD 3 2 s \ o /O A sfi'.' UNDER WALK, PLUG TYPE II CATCH BASIN E PLUG
00 �8" CMP�(SW) '\ • TYPE I CATCH BASIN 18"SD STORM PIPE
REPLACE EN,SIDEWALK
�! 3 -� - r� do (URB, ��
PLUG D�A@AN ON
i
s ► 9 , (N) �_ 1 \ ti�C MATCHLINE
8" CM� w P %r DSO STA. 18+50
�Q f A,
PLUG & ABANDON EX. 6�CONC. E. 'V
A SIDE SEWER �--
NOTES k ABANDON EX. 18" NC. SE Es
-- I ++i (16.-Ez-2} - J. 6s '9C 0- o
I) ALL uNOERGROUND UTILITY CONNECTIONS SFIOWN ARE \F�,,. '^ .;>-' PLUG k/ABANDON �� r7 /�Fse 4 I 09 �'^�- __ UEFLEGT PIPE O JOINTS
AESTIMATED FROM OBSERVATIONS MADE AT POINTS OF 'I`�' ` I 2 SD
NWIPER SPECIFICATIONS
ACCESS(MANHOLES,CATCH BASINS)ONLY.USE AS EXIST. j2 CONIC. I _ _
APPROXIMATE GUIDLINE ONLY. M El_ y _ / / �Gl \ I9
7° I ' PLUG k ABANDON
'.) RIGHT-OF-WAYS AND CENTERUNES SHOWN ARE BASED As, R° Rc /_ _ -'� S� h� z9 -�- EXIST. 12" CONIC. E.
ON RECOVERED STREET MONUMENTAnON•CITY k COUNTY - 1 Ti - R O 25LF l2 -TFRACOTTA 2� M
CB TYPE II 54" 4 `
RECORDS AND UNRECORDED MAPPING 11,195PREPARED BY 4 U E 12" SD /yam STA. 17+76.5 X RT rs �- 1 2 CB /4
H W.RU nIERFORD,ENGINEER ON FEB TI,1952. 7 � \ / J
APPROXIMATE LOCATION,OMER END NOT FOUND ` Ll- �1 REPLACE EX. CO °g ++ 9 (16. E2-4)
RIM=66.24
APPROXIMATLY 392 L.F.8•PVC O 0.92%TO OFFSITE I NEW I.E. 18" (E) 60.89
MANHOLE TO SOUTH. ` EX. LE. 6" CONC. (NW) = 63.44
T EX. LE. 12" CONC. �N)
= 63.29
A STOAPPRDXD AIN AT L.F.BASIN
PVC O aTH. TO OFP$ITE M" CHLINE EX. LE. 12" CONIC. E) = 61.39
' STORM DRAIN CATCH BASIN V SOUTH. p
CB TYPE II 48" 5 STq• 18+ EX. I.E. 12" CONC. W) = 61.39
50 CB TYPE II 54" /1 EX. I.E. 6" CONIC. (SW) - 62.54
STA. 9+40, 30.2'RT STA. 11+60 30.2'RT EX. I.E. 12" CMP S
CB TYPE I /7 O = 61.54
. . . . . . . . . . . . . . . STA'. 9}27.3,'32.8'RT REPLACE EX- CB. . . . . . . . . . . . . . . . . . . . . . . . . . . . REPLACE.EX,.CB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
RIM = 52.16 RIM = 47.82. CB TYPE II 54" 3
REPLACE EX. C8 EX. I.E. 6" CONIC. (NW) = 48.71 EX, I.E. 8" PVC (SW) = 40.92 � APPROI LOC. CB TYPE II 54" /2
RIM = 52.24 OF 2".GAS
EX. I.E. 8" CONIC. (E) = 48.81 EX: I.E. 6" CONIC:. (E) 45.57 STA. 19+14,5, 7RT STA. 10t05, 33'RT
EX. I.E. 6" CONC. (S) 51.14 EX. I.E. 8" CONC. (SW) = 48.96 EX: I.E. 18" CONC. (SE) = 35.37 RIM = 51.77 RIM 50:94
.NEW IE•12".(SE) 49.24 . I.E. 18'•(w), 45,00 I.E. 18" (VN) 39.48 60'
NEW'I.E.•12-(S)'= 46190 ' NEW'IE'. 24"(N)' 1 37.08' ' I.�. 18" (E 40.52 I,�.'1¢" (N)'= 45.60
NEW I.E.*12" N) = 47.00 NEW IE. 12"(NW) = 44.00
f�jECTEO
IT GRADE \ EX. I.E. 12 TERACOTTA I.E. 24" ($) = 39.47
NEW LE.*12" �NW) = 48.98 � INL.,:; '
TO CL (N) = FIELD VERIFY I.E. 12" (W) = 44.00
0 S-A. r1+d7.5, 3Z2'Ri- _120LF 12"SO f.l� B . . . .� , . . . . GRATE =48 GG--_� �F � `5.`5:..• Exisr 6'"CONIC LE.5"'CONC.�S) 46.90, 1. . . . ./ .p,.�
12"CONIC._ `K1 \�o U EXIST GRADE
- - - _ �E O�I S� a o \ PROJECTED TO .
. . . . . . . . .6. . . 1. . SD R 2.OX. - - -.iz"•coNc_. ." -. ¢ J 50...
CB TYPE 1 /6 13 LF 12" SD O 2.0X N - -- _ _ �. s .
U Z
STA. 8+21, 30.2'RT ., N Z
RIM = 53.73 :o a1 �+ a - o
�. REPLACE EX. C9 . DI. 50' I � 'SO gx_rvPF i c�, 45
' NEW i.F_ 12" (S) - 50.73 .156 LF 24" SO O 1.5X STA 19.39, 10.6'RT• x
EX. I.E..6" CONC..(W) = 51.33 FXIST1Nc RIM = 50.70 2 °�
18" CONC. I.E. 8L' (E) = 49.55 a a
INLET CS TYPE II 54" /2 52 LF 18"50 6+20 EXISTING GRADE : GRATE =4a.0o CB /2 EXIST. GRADE �: 45: :4S SO O.2,OX. . 40:..
• LE..6 CONIC.•(S) = A6sG 10+00 PROJECTED-TO•�• .3: y
CB TYPE'I /8 01 U
50 LF 1 STA. 19+42 11.6' LT 11+60 25,LF
2" SD 35 F. REPLACE,EX. CB
45. . . . . . . . . . . . . . . . . . 1 " 45 . RIK = 50.50. - 19+00
O'2.OX NEW LE. .12' SS =. . . . . . . . . . . . .0 cl V . . . . . . . . . . . . . .4. . .12".Sp. .�. ...
Z W O 2.OX l 22LF G p 2.0X
CB'TYPE I 11 a o o NEW I.E. .12" (S) _.47.50 CONCz" ' �9 CF ` `'
STA. 10+84.4, 58'RT EX. I.E. 6" (NE) _ .49.50 .p.2 0X O � / k CB (/3 i�ces(11s E z,6'RT
' x X �,U i CITY OF RENTON
40. . . . . REPLACE•EX.•INLET. . . . . . . . . . &I,. 40. J 45. RIM : .1.n,
RIM 46.60' al l r z EX. I.E. 12" CONC. (NW) = 46.67 DEPARTMENT OF PUBLIC WORKS
a¢ EXISTING EX,I.E. 6" CMP•(SW) = 46.22
IE. 12" (SE) = 45.80 e Nelson Place NW / Rainier Ave. N
' GB TYPE i /10 18'. CONIC.. r R EX,LE. 12- CONC. (S) = 41:12
STA. 11+26.3, 32.2`RT CB•TYPE I N9 Fw NEw LE 1z' (N).= a,.1z Storm System Replacement
RIM., 485. - 3S 40 DESIGN COMPANY
Plan and Profile
3s STA. 19+39 10.6 RT
RIM' = 50.70' DATE: -n-95 RE NAME:93037AINtlpIo
.IE. 12" NW) = 44.70 NEW I.E. 12" (N) = 47.06 9)) �sfll ��' DESIGNED:TvS/x
IE. 12" �S) = 44.80 DRAWN:�UN
S V •CB #1 .R NEW I.E. 12" (E) = 46.96 SHIED . sulF: ,•":o•N. ,•"sv. Fnn.IX>w ..x
EX.'I.E. 8" (E) = 49.55 $SET WA 98104 CHECKED- WR
10+50 11-1-00 11+60 30 19+00 35 Ph= 206M.0326* REV510N Wr APPR. DATE APPROVED: SHEET: 2 OF: 3
D E S I G N C O M P A N Y
t
1
APPENDIX A
' CIA Model Subbasin, Reach and Structure Summaries
1
3/ 3/95 SvR Design Company page 1
City of Renton, WA
Nelson Pl NW/Rainier Ave N
Storm System Replacement Project, 93037
' REACH SUMMARY=====_______________________
' Routing based on Seattle family @ 25 yr freq
Hydraulic Gradeline for Reach H1
<-FROM-> <--TO--> <FLOW> floss Ent_HGL EntLoss ExtLoss OutLet Inlet AppHead BndHead JunHead HeadWtr -cb/mh-
' -----___-______-- cfs --loss- -Elev-- --loss- --loss- --Elev- --Elev- --loss- --loss- --loss- --Elev- --Rim--
SCB199 42.00
�I� I SDCB001 SCB199 24.76 0.94 37.44 0.61 3.05 41.10 42.20 0.91 1.22 0.02 42.52 47.82
SDCB002 SDCB001 24.11 1.50 44.02 0.18 0.91 45.12 42.61 2.37 2.69 0.20 45.64 50.94
SDCB002 46.10
P/D 5 SDCB005 SDCB002 2.78 1.39 tw & do <dc: Inlet Ctrl Assumed 47.38 0.07 0.00 0.03 47.34 52.16
plo l SDCB006 SDCB005 1.72 4.00 tw & do <dc: Inlet Ctrl Assumed 51.00 0.00 0.00 0.00 51.00 53.73
' SDCB002 45.64
/07 SDCB003 SDCB002 21.83 1.96 42.94 0.47 2.37 45.78 46.07 0.00 0.00 0.00 46.07 51.77
Piba SDCB004 SDCB003 21.08 6.36 tw & do <dc: Inlet Ctrl Assumed 66.07 5.31 0.22 1.64 62.62 66.24
' SDCB004
64.26
SCB215 SDCB004 5.81 0.58 64.87 0.17 0.85 65.89 66.03 0.13 0.00 0.09 65.99 68.00
PZ v SCB216 SCB215 2.29 0.86 66.86 0.03 0.13 67.02 66.85 0.00 0.00 0.00 67.02 75.00
SDCB004
62.62
SCB205 SDCB004 14.52 38.09 100.48 1.06 5.31 106.85 97.65 4.52 0.95 0.31 95.10* 95.00
7 Zo4 SCB206 SCB205 13.40 3.39 91.37 0.90 4.52 96.79 96.61 3.05 2.56 0.50 94.60* 94.50
PZ03 SCB207 SCB206 11.01 26.06 114.44 0.61 3.05 118.10 98.40 0.00 0.00 0.00 102.10* 102.00
SCB207 102.10
SCB210 SCB207 6.91 3.17 105.27 0.24 1.20 106.71 104.03 0.00 0.00 0.00 0.10* 0.00
D217: Upstream W.S. 103.66 ft (Gravity) Gravity flow at upend, ®( 29.24 ft) Trans dist: ft
D216: Upstream W.S. 118.61 ft (Gravity) Gravity flow at upend, ®(207.26 ft) Trans dist: 6.28 ft
SCB213 SCB212 2.48 3.58 tw & do <dc: Inlet Ctrl Assumed 122.03 0.00 0.00 0.00 122.03 126.33
SCB207 102.10
SCB208 SCB207 4.91 3.77 105.87 0.12 0.61 106.60 127.31 0.18 0.00 0.09 127.22 132.00
PZ0' SCB209 SCB208 2.70 1.27 128.49 0.04 0.18 128.71 171.33 0.00 0.00 0.00 171.33 179.00
3/ 3/95 SvR Design Company page 1
City of Renton, WA
Nelson P1 NW/Rainier Ave N
Storm System Replacement Project, 93037
' ------------------- REACH SUMMARY
Routing based on Seattle family @ 25 yr freq
Network NET5 :
' Pipe Reach Basin Area --c- --c*A- --Sum- ---Tc- --i-- --QAct Dia -Mann -Slope -Q ry4x Vfull -Vact -Length __tt__
---------- Id ac --c*A- - min in/hr cfs in --n-- ft/ft cfs fps fps ft min
' P221 BA214 1.79 0.70 1.25 1.25 5.31 2.66 3.33 12 0.012 0.1697 17.15 21.84 16.04 154.88 0.16
Network NET4 :
Pipe Reach Basin Area --c- --c*A- --Sum- ---Tc- --i-- --QAct Dia -Mann -Slope -Q",QX Vfull -Vact -Length --tt--
' ---------- Id ac --c*A- - min in/hr cfs in --n-- ft/ft cfs fps fps ft min
P215 BA213 1.51 0.70 1.06 1.06 7.50 2.35 2.48 12 0.012 0.0749 11.39 14.51 11.01 45.26 0.07
' D216 1.06 7.57 2.34 2.47 xxx 0.030 0.0728 0.32ft deep 4.79 207.26 0.72
D217 2.31 8.29 2.24 5.17 xxx 0.030 0.0728 0.46ft deep 5.86 29.24 0.08
P218 BA210 1.13 0.70 0.79 3.10 8.38 2.23 6.91 12 0.012 0.0725 11.21 14.28 14.19 99.41 0.12
' Network NET3 :
Pipe Reach Basin Area --c- --c*A- --Sum- ---Tc- --i-- --QAct Dia -Mann -Slope -QmA X Vfull -Vact -Length --tt--
---------- Id ac --c*A- - min in/hr cfs in --n-- ft/ft cfs fps fps ft min
1.23 0.80 0.98 0.98 7.66 2.33 2.29 12 0.012 0.0113 4.43 5.64 5.39 246.94 0.76
-----==-==-=---========-=-=____====_=====_====_=__======_======-------=====--------===_==============___====_=_===
P222 BA216
P223 BA215 2.04 0.80 1.63 2.62 8.42 2.22 5.81 12 0.012 0.0159 5.25 6.69 7.40 25.75 0.06
Network NET2 :
Pipe Reach Basin Area --c- --c*A- --Sum- ---Tc- --i-- --QAct Dia -Mann -Slope -QpnAX Vfull -Vact -Length --tt--
---------- Id ac --c*A- - min in/hr cfs in --n-- ft/ft cfs fps fps ft min
P101 BA218 0.75 0.85 0.64 0.64 5.00 2.70 1.72 12 0.012 0.0303 7.25 9.23 7.17 123.12 0.29
do P105 BA217 0.48 0.85 0.41 1.05 5.29 2.66 2.78 12 0.012 0.0200 5.89 7.49 7.00 65.03 0.15
h
W Network NETT :
2 Pipe Reach Basin Area --c- --c*A- --Sum- ---Tc- --i-- --QAct Dia -Mann -Slope -QtngX Vfull -Vact -Length --tt--
---------- Id ac --c*A- - min in/hr cfs in --n-- ft/ft cfs' fps fps ft min_____________________________________________________________________________________'==== ===== =====____________
\� P201 BA209 1.88 0.70 1.32 1.32 9.65 2.05 2.70 12 0.012 0.1743 17.38 22.13 15.25 261.12 0.29
P202 BA208 1.61 0.70 1.13 2.44 9.94 2.01 4.91 12 0.012 0.1350 15.29 19.47 16.44 234.46 0.24
' P203 5.54 10.18 1.99 11.01 12 0.012 0.0141 4.95 6.30 14.02 322.00 0.38
P204 BA206 1.87 0.70 1.31 6.85 10.56 1.96 13.40 12 0.012 0.0142 4.95 6.31 17.06 28.25 0.03
VP205 BA205 0.83 0.70 0.58 7.43 10.59 1.95 14.52 12 0.012 0.0946 12.80 16.30 18.49 270.64 0.24
' P100 BA204 1.22 0.70 0.85 10.90 10.83 1.93 21.08 18 0.012 0.1156 41.73 23.62 22.41 137.46 0.10
P102 BA202 0.51 0.85 0.43 11.34 10.93 1.93 21.83 18 0.012 0.0194 17.11 9.68 12.35 53.52 0.07
P103 BA201 0.21 0.85 0.18 12.56 11.00 1.92 24.11 24 0.012 0.0150 32.38 10.31 10.65 155.99 0.24
' P199 BA200 0.55 0.85 0.47 13.03 11.25 1.90 24.76 18 0.012 0.0185 16.69 9.45 14.01 20.00 0.02
3/ 3/95 SvR Design Company page 1
' City of Renton, WA
Nelson P1 NW/Rainier Ave N
Storm System Replacement Project, 93037
REACH SUMMARY
' Routing based on Seattle family @ 25 yr freq
DITCH REACH ID No. D216
Ditch Length: 207 . 26 ft Ditch Width: 1 . 00 ft
' Side Slopel : 2 . 00 Ditch Slope : 0 . 0728 ft/ft
Side Slope2 : 2 . 00 Contrib Bas :
Mannings n : 0 . 0300 Dn Invert 103 . 21 ft
' Dn W.S . Elev: 103 . 6587 Num Steps 10
Trib Area: Ac . Design Flow 2 .47 cfs
Depth 0 . 32 ft Vel 4 . 79 fps
Upstream W.S . Elev: 118 . 61 ft .
DITCH REACH ID No. D217
Ditch Length: 29 . 24 ft Ditch Width: 1 . 00 ft
Side Slopel 2 . 00 Ditch Slope : 0 . 0728 ft/ft
' Side Slope2 2 . 00 Contrib Bas :
Mannings n : 0 . 0300 Dn Invert 101 . 07 ft
Dn W.S . Elev: 0 . 1000 Num Steps 10
Trib Area: Ac . Design Flow 5 . 17 cfs
Depth 0 .46 ft Vel 5 . 86 fps
Upstream W.S. Elev: 103 . 66 ft .
' PIPE REACH ID No. P100
From: SDCB004 To: SDCB003
Pipe Diameter. 1 . 50 ft n. 0 . 0120
Pipe Length 137 .46 ft s : 0 . 1156
' Up invert 60 . 89 ft down invert : 45 . 00
Collection Area: 15 . 11 Ac.
Design Flow 21 . 08 cfs Dsgn Depth: 0 . 71 ft
Pipe Capacity 41 . 73 cfs
Design Vel 22 . 41 fps Travel Time : 0 . 10 min
Pipe Full Vel 24 . 24 fps
PIPE REACH ID No. P101
' From: SDCB006 To: SDCB005
Pipe Diameter: 1 . 00 ft n: 0 . 0120
Pipe Length 123 . 12 ft s : 0 . 0303
' Up invert 50 . 73 ft down invert : 47 . 00
Collection Area: 0 . 75 Ac .
Design Flow 1 . 72 cfs Dsgn Depth: 0 . 34 ft
Pipe Capacity 7 . 25 cfs
Design Vel 7 . 17 fps Travel Time : 0 . 29 min
Pipe Full Vel 9 .47 fps
1
3/ 3/95 SvR Design Company page 2
' City of Renton, WA
Nelson P1 NW/Rainier Ave N
Storm System Replacement Project, 93037
REACH SUMMARY
' PIPE REACH ID No. P102
From: SDCB003 To: SDCB002
Pipe Diameter: 1 . 50 ft n: 0 . 0120
' Pipe Length 53 . 52 ft s : 0 . 0194
Up invert 40 . 52 ft down invert : 39 .48
Collection Area: 15 . 62 Ac .
' Design Flow 21 . 83 cfs Dsgn Depth: ft
Pipe Capacity 17 . 11 cfs
Design Vel 12 . 35 fps Travel Time : 0 . 07 min
Pipe Full Vel 9 . 94 fps
(surcharged tt)
' PIPE REACH ID No. P103
From: SDCB002 To: SDCB001
Pipe Diameter: 2 . 00 ft n: 0 . 0120
Pipe Length 155 . 99 ft s : 0 . 0150
Up invert 39 .42 ft down invert : 37 . 08
Collection Area : 17 . 06 Ac .
Design Flow 24 . 11 cfs Dsgn Depth: 0 . 65 ft
Pipe Capacity 32 . 38 cfs
Design Vel 10 . 65 fps Travel Time : 0 . 24 min
Pipe Full Vel 10 . 58 fps
i
' PIPE REACH ID No. P105
From: SDCB005 To: SDCB002
Pipe Diameter: 1 . 00 ft n: 0 . 0120
Pipe Length 65 . 03 ft s : 0 . 0200
' Up invert 46 . 90 ft down invert : 45 . 60
Collection Area: 1 . 23 Ac .
Design Flow 2 . 78 cfs Dsgn Depth: 0 . 50 ft
' Pipe Capacity 5 . 89 cfs
Design Vel 7 . 00 fps Travel Time : 0 . 15 min
Pipe Full Vel 7 . 69 fps
PIPE REACH ID No. P199
' From: SDCB001 To: SCB199
Pipe Diameter: 1 . 50 ft n: 0 . 0120
Pipe Length 20 . 00 ft s : 0 . 0185
Up invert 35 .37 ft down invert : 35 . 00
Collection Area : 17 . 61 Ac .
Design Flow 24 . 76 cfs Dsgn Depth: ft
Pipe Capacity 16 . 69 cfs
' Design Vel 14 . 01 fps Travel Time : 0 . 02 min
Pipe Full Vel 9 . 70 fps
(surcharged tt)
3/ 3/95 SvR Design Company page 3
City of Renton, WA
Nelson Pl NW/Rainier Ave N
Storm System Replacement Project, 93037
REACH SUMMARY
' PIPE REACH ID No. P201
From: SCB209 To: SCB208
Pipe Diameter: 1 . 00 ft n: 0 . 0120
' Pipe Length 261 . 12 ft s : 0 . 1743
Up invert 171 . 00 ft down invert : 125 . 50
Collection Area : 1 . 88 Ac .
' Design Flow 2 . 70 cfs Dsgn Depth: 0 . 28 ft
Pipe Capacity 17 . 38 cfs
Design Vel 15 . 25 fps Travel Time : 0 . 29 min
' Pipe Full Vel 22 . 71 fps
' PIPE REACH ID No. P202
From: SCB208 To: SCB207
Pipe Diameter: 1 . 00 ft n: 0 . 0120
Pipe Length 234 . 46 ft s : 0 . 1350
Up invert 125 . 50 ft down invert : 93 . 86
Collection Area: 3 .49 Ac .
Design Flow 4 . 91 cfs Dsgn Depth: 0 .41 ft
' Pipe Capacity 15 . 29 cfs
Design Vel 16 .44 fps Travel Time : 0 . 24 min
Pipe Full Vel 19 . 98 fps
' PIPE REACH ID No. P203
From: SCB207 To: SCB206
Pipe Diameter: 1 . 00 ft n: 0 . 0120
Pipe Length 322 . 00 ft s : 0 . 0141
' Up invert 91 . 93 ft down invert : 87 . 38
Collection Area : 7 . 92 Ac .
Design Flow 11 . 01 cfs Dsgn Depth: ft
' Pipe Capacity 4 . 95 cfs
Design Vel 14 . 02 fps Travel Time : 0 . 38 min
Pipe Full Vel 6 .47 fps
(surcharged tt)
PIPE REACH ID No. P204
' From: SCB206 To: SCB205
Pipe Diameter: 1 . 00 ft n: 0 . 0120
Pipe Length 28 . 25 ft s : 0 . 0142
Up invert 87 . 38 ft down invert : 86 . 98
Collection Area: 9 . 79 Ac .
Design Flow 13 .40 cfs Dsgn Depth: ft
Pipe Capacity 4 . 95 cfs
Design Vel 17 . 06 fps Travel Time : 0 . 03 min
Pipe Full Vel 6 .47 fps
(surcharged tt)
3/ 3/95 SvR Design Company page 4
' City of Renton, WA
Nelson P1 NW/Rainier Ave N
Storm System Replacement Project, 93037
----------------
REACH SUMMARY
' PIPE REACH ID No. P205
From: SCB205 To: SDCB004
Pipe Diameter: 1 . 00 ft n: 0 . 0120
' Pipe Length 270 . 64 ft s : 0 . 0946
Up invert 86 . 98 ft down invert : 61 . 39
Collection Area : 10 . 62 Ac.
Design Flow 14 . 52 cfs Dsgn Depth: ft
Pipe Capacity 12 . 80 cfs
Design Vel 18 .49 fps Travel Time : 0 . 24 min.
' Pipe Full Vel 16 . 73 fps
(surcharged tt)
' PIPE REACH ID No. P215
From: SCB213 To: SCB212
Pipe Diameter: 1 . 00 ft n: 0 . 0120
' Pipe Length 45 . 26 ft s : 0 . 0749
Up invert 121 . 68 ft down invert : 118 . 29
Collection Area: 1 . 51 Ac .
Design Flow 2 .48 cfs Dsgn Depth: 0 . 33 ft
Pipe Capacity 11 . 39 cfs
Design Vel 11 . 01 fps Travel Time : 0 . 07 min
Pipe Full Vel 14 . 89 fps
' PIPE REACH ID No. P218
From: SCB210 To: SCB207
Pipe Diameter: 1 . 00 ft n: 0 . 0120
Pipe Length 99 .41 ft s : 0 . 0725
Up invert 101 . 07 ft down invert : 93 . 86
Collection Area: 4 .43 Ac .
Design Flow 6 . 91 cfs Dsgn Depth: 0 .41 ft
Pipe Capacity 11 . 21 cfs
Design Vel 14 . 19 fps Travel Time : 0 . 12 min
Pipe Full Vel 14 . 65 fps
PIPE REACH ID No. P220
' From: SCB214 To: SCB211
Pipe Diameter: 1 . 00 ft n: 0 . 0120
Pipe Length 154 . 88 ft s : 0 . 1697
' Up invert 129 . 50 ft down invert : 103 . 21
Collection Area : 1 . 79 Ac .
Design Flow 3 . 33 cfs Dsgn Depth: 0 . 31 ft
Pipe Capacity 17 . 15 cfs
' Design Vel 16 . 04 fps Travel Time : 0 . 16 min
Pipe Full Vel 22 .41 fps
3/ 3/95 SvR Design Company page 5
City of Renton, WA
Nelson P1 NW/Rainier Ave N
Storm System Replacement Project, 93037
REACH SUMMARY
' PIPE REACH ID No. P222
From: SCB216 To: SCB215
Pipe Diameter: 1 . 00 ft n: 0 . 0120
' Pipe Length 246 . 94 ft s : 0 . 0113
Up invert 66 . 50 ft down invert : 63 . 70
Collection Area : 1 . 23 Ac .
' Design Flow 2 . 29 cfs Dsgn Depth: 0 . 53 ft
Pipe Capacity 4 . 43 cfs
Design Vel 5 . 39 fps Travel Time : 0 . 76 min
' Pipe Full Vel 5 . 79 fps
' PIPE REACH ID No. P223
From: SCB215 To: SDCB004
Pipe Diameter: 1 . 00 ft n: 0 . 0120
Pipe Length 25 . 75 ft s : 0 . 0159
Up invert 63 . 70 ft down invert : 63 . 29
Collection Area: 3 . 27 Ac .
Design Flow 5 . 81 cfs Dsgn Depth: ft
Pipe Capacity 5 . 25 cfs
Design Vel 7 .40 fps Travel Time : 0 . 06 min
Pipe Full Vel 6 . 86 fps
' (surcharged tt)
' PIPE REACH ID No. P225
From: SCB218 To: SCB217
Pipe Diameter. 1 . 00 ft n: 0 . 0120
Pipe Length 120 . 00 ft s : 0 . 0248
t Up invert 50 . 73 ft down invert : 47 . 76
Collection Area : Ac .
Design Flow cfs Dsgn Depth: ft
' Pipe Capacity cfs
Design Vel fps Travel Time : min
Pipe Full Vel fps
PIPE REACH ID No. P226
' From: SCB217 To: SCB201
Pipe Diameter: 1 . 00 ft n: 0 . 0120
Pipe Length 68 . 00 ft s : 0 . 0226
' Up invert 47 . 66 ft down invert : 46 . 12
Collection Area : Ac .
Design Flow cfs Dsgn Depth: ft
Pipe Capacity cfs
' Design Vel fps Travel Time : min
Pipe Full Vel fps
3/ 3/95 SvR Design Company page 1
' City of Renton, WA
Nelson Pl NW/Rainier Ave N
Storm System Replacement Project, 93037
RATIONAL DRAINAGE AREA SUMMARY=====_______________
' Drainage Area Id: BA200
Description. . . . . : CONTRIBUTING TO SCB200
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
COMMERCIAL 0 . 55 0 . 85 50 . 00 0 . 0200 7 . 00 0 . 84
70 . 00 0 . 0200 20 . 00 0 .41
120 . 00 0 . 0500 20 . 00 0 .45
' Composite "c" Value . . . . . . . . 0 . 85 Time of Conc (min) . . 5 . 00
Drainage Area Id: BA201
Description. . . . . : CONTRIBUTING TO SCB201
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
COMMERCIAL 0 . 21 0 . 85 50 . 00 0 . 1500 7 . 00 0 . 31
' 50 . 00 0 . 0300 20 . 00 0 . 24
Composite "c" Value . . . . . . . . 0 . 85 Time of Conc (min) . . 5 . 00
' Drainage Area Id: BA202
Description. . . . . : CONTRIBUTING TO SCB202
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
' COMMERCIAL 0 . 51 0 . 85 50 . 00 0 . 1500 7 . 00 0 . 31
150 . 00 0 . 0200 20 . 00 0 . 88
120 . 00 0 . 0100 20 . 00 1 . 00
' Composite "c" Value . . . . . . . . 0 . 85 Time of Conc (min) . . 5 . 00
' Drainage Area Id: BA204
Description. . . . . : CONTRIBUTING TO SCB204
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
SINGLE FAMILY 1 . 22 0 . 70 230 . 00 0 . 0800 2 . 50 5 .42
50 . 00 0 . 0200 20 . 00 0 . 29
150 . 00 0 . 2000 20 . 00 0 . 28
Composite "c" Value . . . . . . . . 0 . 70 Time of Conc (min) . . 6 . 00
Drainage Area Id: BA205
' Description. . . . . : CONTRIBUTES TO SCB205
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
SINGLE FAMILY 0 . 83 0 . 70 260 . 00 0 . 1400 2 . 50 4 . 63
130 . 00 0 . 0300 7 . 00 1 . 79
25 . 00 0 . 0300 20 . 00 0 . 12
Composite "c" Value . . . . . . . . 0 . 70 Time of Conc (min) . . 6 . 54
' 3/ 3/95 SvR Design Com an a
g P Y p ge 2
City of Renton, WA
' Nelson P1 NW/Rainier Ave N
Storm System Replacement Project, 93037
------------
RATIONAL DRAINAGE AREA SUMMARY
' Drainage Area Id: BA206
Description. . . . . : CONTRIBUTES TO BA206
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
SINGLE FAMILY 1 . 87 0 . 70 240 . 00 0 . 1300 2 . 50 4 .44
' 50 . 00 0 . 0200 7 . 00 0 . 84
250 . 00 0 . 0200 20 . 00 1 .47
Composite "c" Value . . . . . . . . 0 . 70 Time of Conc (min) . . 6 . 75
Drainage Area Id: BA208
' Description. . . . . : CONTRIBUTES TO SCB208
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
SINGLE FAMILY 1 . 61 0 . 70 260 . 00 0 . 1300 2 . 50 4 . 81
270 . 00 0 . 0400 7 . 00 3 . 21
' 20 . 00 0 . 0200 20 . 00 0 . 12
Composite "c" Value . . . . . . . . 0 . 70 Time of Conc (min) . . 8 . 14
' Drainage Area Id: BA209
Description. . . . . : CONTRIBUTES TO SCB209
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
' SINGLE FAMILY 1 . 88 0 . 70 110 . 00 0 . 1000 2 . 50 2 . 32
150 . 00 0 . 1500 2 . 50 2 . 58
270 . 00 0 . 0200 7 . 00 4 . 55
35 . 00 0 . 0200 20 . 00 0 . 21
Composite "c" Value . . . . . . . . 0 . 70 Time of Conc (min) . . 9 . 65
tDrainage Area Id: BA210
Description. . . . . : CONTRIBUTES TO SCB210
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
' SINGLE FAMILY 1 . 13 0 . 70 200 . 00 0 . 1300 2 . 50 3 . 70
100 . 00 0 . 0500 7 . 00 1 . 06
40 . 00 0 . 0200 20 . 00 0 . 24
' Composite "c" Value . . . . . . . . 0 . 70 Time of Conc (min) . . 5 . 00
Drainage Area Id: BA213
' Description. . . . . : CONTRIBUTES TO SCB213
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
SINGLE FAMILY 1 . 51 0 . 70 280 . 00 0 . 1300 2 . 50 5 . 18
70 . 00 0 . 0250 20 . 00 0 . 37
130 . 00 0 . 0250 7 . 00 1 . 96
Composite "c" Value . . . . . . . . 0 . 70 Time of Conc (min) . . 7 . 50
' 3/ 3/95 SvR Design Company page 3
P Y P g
City of Renton, WA
Nelson Pl NW/Rainier Ave N
Storm System Replacement Project, 93037
---------------------------------------------------------------------
---------------------------------------------------------------------
' RATIONAL DRAINAGE AREA SUMMARY
' Drainage Area Id: BA214
Description. . . . . : CONTRIBUTES TO SCB214
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
SINGLE FAMILY 1 . 79 0 . 70 230 . 00 0 . 1300 2 . 50 4 . 25
' 180 . 00 0 . 0200 20 . 00 1 . 06
Composite "c" Value . . . . . . . . 0 . 70 Time of Conc (min) . . 5 . 31
Drainage Area Id: BA215
Description. . . . . : CONTRIBUTES TO SCB215
' <---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
MULTI-FAMILY 2 . 04 0 . 80 220 . 00 0 . 1000 2 . 50 4 . 64
300 . 00 0 . 0200 20 . 00 1 . 77
Composite "c" Value . . . .. . . . . 0 . 80 Time of Conc (min) . . 6 .41
Drainage Area Id: BA216
' Description. . . . . : CONTRIBUTES TO SCB216
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
MULTI-FAMILY 1 . 23 0 . 80 300 . 00 0 . 0800 2 . 50 7 . 07
' 100 . 00 0 . 0200 20 . 00 0 . 59
Composite "c" Value . . . . . . . . 0 . 80 Time of Conc (min) . . 7 . 66
' Drainage Area Id: BA217
Description. . . . . : CONTRIBUTES TO SCB217
<---Description--> SubArea SubC L (ft) Slope -Kr-- (min)
COMMERCIAL 0 .48 0 . 85 220 . 00 0 . 0200 20 . 00 1 . 30
Composite "c" Value . . . . . . . . 0 . 85 Time of Conc (min) . . 5 . 00
' Drainage Area Id: BA218
Description. . . . . : CONTRIBUTES TO SCB218
<-- -Description--> SubArea SubC L (ft) Slope -Kr-- (min)
COMMERCIAL 0 . 75 0 . 85 200 . 00 0 . 0200 20 . 00 1 . 18
50 . 00 0 . 0200 20 . 00 0 . 29
Composite "c" Value . . . . . . . . 0 . 85 Time of Conc (min) . . 5 . 00
3/ 3/95 SvR Design Company page 1
' City of Renton, WA
Nelson P1 NW/Rainier Ave N
Storm System Replacement Project, 93037
RATIONAL DRAINAGE AREA SUMMARY
' EXISTING STRUCTURE REACH ID No. SCB199
Location North 180739 . 5014
' Str Type East 1657965 . 9316
Str Cat Dummy Structure Rim Elev 0 . 0000
Str Diam 12 . 00 in Bottom El : 35 . 0000
Cont Area : Hgrade El : 42 . 0000 ft
Bend. . . . . : No special shape
Ent type . : Str Diam :
' Ent Loss : 0 . 000 Exit : 0 . 000 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
Reach <Invert> <Diam> < n > <End>
P199 35 . 000 18 . 00 0 . 012 Lower
EXISTING STRUCTURE REACH ID No. SCB205
iLocation : North 180875 . 0134
Str Type : BRICK East 1657497 . 8277
' Str Cat : Catch Basin Rim Elev 95 . 0000
Area/sump: 6 . 28 sf/1 . 50 ft Bottom El : 85 .4800
Cont Area : BA205 Hgrade El . 95 . 1000 ft
Bend. . . . . : No special shape
Ent type . : Area/sump :
Ent Loss : 1 . 061 Exit : 5 . 307 App Vel : 4 . 520 Junct : 0 . 306 Bend: 0 . 949
' Reach <Invert> <Diam> < n > <End>
P205 86 . 980 12 . 00 0 . 012 Upper
P204 86 . 980 12 . 00 0 . 012 Lower
EXISTING STRUCTURE REACH ID No . SCB206
Location : North 180885 . 4512
Str Type TYPE1 East 1657471 . 5715
Str Cat Catch Basin Rim Elev 94 . 5000
' Area/sump: 4 . 17 sf/1 . 50 ft Bottom El : 85 . 8800
Cont Area : BA206 Hgrade El : 94 . 6000 ft
Bend. . . . . . No special shape
Ent type . : Area/sump:
' Ent Loss : 0 . 904 Exit : 4 . 520 App Vel : 3 . 051 Junct : 0 . 503 Bend: 2 . 559
Reach <Invert> <Diam> < n > <End>
' P204 87 . 380 12 . 00 0 . 012 Upper
P203 87 . 380 12 . 00 0 . 012 Lower
3/ 3/95 SvR Design Company page 2
City of Renton, WA
Nelson Pl NW/Rainier Ave N
Storm System Replacement Project, 93037
STRUCTURE REPORT
' EXISTING STRUCTURE REACH ID No. SCB207
Location : North 181207 . 2793
Str Type BRICK East 1657481 . 9647
Str Cat Catch Basin Rim Elev 102 . 0000
Area/sump: 6 . 28 sf/1 . 50 ft Bottom El : 90 .4300
' Cont Area : Hgrade El : 102 . 1000 ft
Bend. . . . . : No special shape
Ent type . : Area/sump:
' Ent Loss : 0 . 610 Exit : 3 . 051 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
Reach <Invert> <Diam> < n > <End>
P203 91 . 930 12 . 00 0 . 012 Upper
' P201 93 . 860 12 . 00 0 . 024 Lower
P202 93 . 860 12 . 00 0 . 012 Lower
P218 93 . 860 12 . 00 0 . 012 Lower
1
EXISTING STRUCTURE REACH ID No. SCB208
' Location : North 181210 .4656
Str Type : BRICK East 1657247 . 5312
Str Cat : Catch Basin Rim Elev 132 . 0000
' Area/sump: 6 . 28 sf/1 . 50 ft Bottom El : 124 . 0000
Cont Area : BA208 Hgrade El : 127 . 2186 ft
Bend. . . . . : No special shape
Ent type . : Area/sump:
Ent Loss : 0 . 121 Exit : 0 . 606 App Vel : 0 . 183 Junct : 0 . 088 Bend: 0 . 001
Reach <Invert> <Diam> < n > <End>
' P202 125 . 500 12 . 00 0 . 012 Upper
P201 125 . 500 12 . 00 0 . 012 Lower
1
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3/ 3/95 SvR Design Company page 3
City of Renton, WA
Nelson P1 NW/Rainier Ave N
Storm System Replacement Project, 93037
STRUCTURE REPORT
' EXISTING STRUCTURE REACH ID No. SCB209
Location : North 181215 . 2578
' Str Type BRICK East 1656986 .4564
Str Cat Catch Basin Rim Elev 179 . 0000
Area/sump : 6 . 28 sf/1 . 50 ft Bottom El : 169 . 5000
' Cont Area : BA209 Hgrade El : 171 . 3302 ft
Bend. . . . . : No special shape
Ent type . : Area/sump:
' Ent Loss : 0 . 037 Exit : 0 . 183 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
Reach <Invert> <Diam> < n > <End>
P201 171 . 000 12 . 00 0 . 012 Upper
1
PROPOSED STRUCTURE REACH ID No. SCB210
' Location : North 181288 . 9358
Str Type : --- East 1657425 . 2717
Str Cat : Dummy Structure Rim Elev 0 . 0000
Str Diam : 12 . 00 in Bottom El : 101 . 0700
Cont Area : BA210 Hgrade El : 0 . 1000 ft
Bend. . . . . : No special shape
' Ent type . : Str Diam :
Ent Loss : 0 . 240 Exit : 1 . 201 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
' Reach <Invert> <Diam> < n > <End>
P218 101 . 070 12 . 00 0 . 012 Upper
' PROPOSED STRUCTURE REACH ID No . SCB211
Location : North 181314 . 8064
' Str Type --- East 1657411 . 6547
Str Cat Dummy Structure Rim Elev 0 . 0000
Str Diam 0 . 00 in Bottom El : 103 . 2100
' Cont Area: Hgrade El : 0 . 0000 ft
Bend. . . . . : No special shape
Ent type . : Str Diam .
Ent Loss : 0 . 000 Exit : 0 . 000 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
Reach <Invert> <Diam> < n > <End>
P220 103 . 210 12 . 00 0 . 012 Lower
3/ 3/95 SvR Design Company page 4
' City of Renton, WA
Nelson Pl NW/Rainier Ave N
Storm System Replacement Project, 93037
STRUCTURE REPORT
PROPOSED STRUCTURE REACH ID No. SCB212
Location : North 181495 . 2372
Str Type --- East 1657309 . 6669
Str Cat Dummy Structure Rim Elev 0 . 0000
Str Diam 0 . 00 in Bottom El : 118 . 2900
' Cont Area : Hgrade El : 0 . 0000 ft
Bend. . . . . : No special shape
Ent type . : Str Diam :
' Ent Loss : 0 . 000 Exit : 0 . 000 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
Reach <Invert> <Diam> < n > <End>
P215 118 , 290 12 . 00 0 . 012 Lower
EXISTING STRUCTURE REACH ID No. SCB213
' Location : North 181535 . 2337
Str Type TYPE1 East 1657288 .4884
' Str Cat Catch Basin Rim Elev 126 . 3300
Area/sump: 4 . 17 sf/1 . 50 ft Bottom El : 120 . 1800
Cont Area : BA213 Hgrade El . 122 . 0255 ft
Bend. . . . . : No special shape
' Ent type . : Area/sump:
Ent Loss : 0 . 000 Exit : 0 . 000 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
Reach <Invert> <Diam> < n > <End>
P215 121 . 680 12 . 00 0 . 012 Upper
' EXISTING STRUCTURE REACH ID No . SCB214
Location : North 181318 . 2541
' Str Type TYPE1 East 1657256 . 8146
Str Cat Catch Basin Rim Elev 132 . 5000
Area/sump: 4 . 17 sf/1 . 50 ft Bottom El : 128 . 0000
' Cont Area : BA214 Hgrade El : 0 . 0000 ft
Bend. . . . . : No special shape
Ent type . : Area/sump:
Ent Loss : 0 . 000 Exit : 0 . 000 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
' Reach <Invert> <Diam> < n > <End>
P220 129 . 500 12 . 00 0 . 012 Upper
3/ 3/95 SvR Design Company page 5
' City of Renton, WA
Nelson Pl NW/Rainier Ave N
Storm System Replacement Project, 93037
STRUCTURE REPORT
' EXISTING STRUCTURE REACH ID No . SCB215
Location : North 180944 . 4999
' Str Type TYPE1 East 1657763 . 6971
Str Cat Catch Basin Rim Elev 68 . 0000
Area/sump: 4 . 17 sf/1 . 50 ft Bottom El : 62 . 2000
' Cont Area: BA215 Hgrade El : 65 . 9925 ft
Bend. . . . . : No special shape
Ent type . : Area/sump:
Ent Loss : 0 . 170 Exit : 0 . 849 App Vel : 0 . 132 Junct : 0 . 094 Bend: 0 . 001
' Reach <Invert> <Diam> < n > <End>
P223 63 . 700 12 . 00 0 . 012 Upper
P222 63 . 700 12 . 00 0 . 012 Lower
EXISTING STRUCTURE REACH ID No. SCB216
Location : North 181191 . 2969
Str Type BRICK East 1657755 . 3140
' Str Cat Catch Basin Rim Elev 75 . 0000
Area/sump: 6 . 28 sf/1 . 50 ft Bottom El : 65 . 0000
Cont Area : BA216 Hgrade El : 67 . 0158 ft
' Bend. . . . . : No special shape
Ent type . : Area/sump:
Ent Loss : 0 . 026 Exit : 0 . 132 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
Reach <Invert> <Diam> < n > <End>
P222 66 . 500 12 . 00 0 . 012 Upper
PROPOSED STRUCTURE REACH ID No. SDCB001
' Location : North 180759 . 5014
Str Type : TYPE 2 MH East 1657965 . 9316
Str Cat : Catch Basin Rim Elev 47 . 8200
Area/sump: 15 . 90 sf/2 . 00 ft Bottom El : 33 . 3700
' Cont Area: BA200 Hgrade El : 42 . 5199 ft
Bend. . . . . : No special shape
Ent type . : Area/sump:
' Ent Loss : 0 . 609 Exit : 3 . 047 App Vel : 0 . 915 Junct : 0 . 020 Bend: 1 . 218
Reach <Invert> <Diam> < n > <End>
' P199 35 . 370 18 . 00 0 . 012 Upper
P103 37 . 080 24 . 00 0 . 012 Lower
3/ 3/95 SvR Design Company page 6
City of Renton, WA
Nelson Pl NW/Rainier Ave N
Storm System Replacement Project, 93037
STRUCTUREREPORT=====______________________
' PROPOSED STRUCTURE REACH ID No. SDCB002
Location : North 180915 . 1573
' Str Type TYPE 2 MH East 1657955 . 7729
Str Cat Catch Basin Rim Elev 50 . 9400
Area/sump: 15 . 90 sf/2 . 00 ft Bottom El : 37 .4200
' Cont Area: BA201 Hgrade El : 45 . 6403 ft
Bend. . . . . : No special shape
Ent type . : Area/sump:
' Ent Loss : 0 . 183 Exit : 0 . 915 App Vel : 2 . 369 Junct : 0 . 199 Bend: 2 . 691
Reach <Invert> <Diam> < n > <End>
P102 39 .480 18 . 00 0 . 012 Lower
' P103 39 .420 24 . 00 0 . 012 Upper
P105 45 . 600 12 . 00 0 . 012 Lower
' PROPOSED STRUCTURE REACH ID No. SDC2003
Location : North 180918 .4643
' Str Type TYPE 2 MH East 1657902 . 3600
Str Cat Catch Basin Rim Elev 51 . 7700
Area/sump: 15 . 90 sf/2 . 00 ft Bottom El : 38 . 5200
Cont Area : BA202 Hgrade El : 46 . 0711 ft
Bend. . . . . : No special shape
Ent type . : Area/sump:
Ent Loss : 0 .474 Exit : 2 . 369 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
Reach <Invert> <Diam> < n > <End>
P102 40 . 520 18 . 00 0 . 012 Upper
' P100 45 . 000 18 . 00 0 . 012 Lower
' PROPOSED STRUCTURE REACH ID No. SDCB004
Location : North 180918 . 7815
' Str Type TYPE 2 MH East 1657764 . 9004
Str Cat Catch Basin Rim Elev 66 . 2400
Area/sump: 15 . 90 sf/2 . 00 ft Bottom El . 58 . 8900
Cont Area : BA204 Hgrade El : 62 . 6195 ft
' Bend. . . . . : No special shape
Ent type . : Area/sump:
Ent Loss : 0 . 000 Exit : 0 . 000 App Vel : 5 . 307 Junct : 1 . 638 Bend: 0 . 219
' Reach <Invert> <Diam> < n > <End>
P223 63 . 290 12 . 00 0 . 012 Lower
' P205 61 . 390 12 . 00 0 . 012 Lower
P100 60 . 890 18 . 00 0 . 012 Upper
3/ 3/95 SvR Design Company page 7
City of Renton, WA
Nelson P1 NW/Rainier Ave N
Storm System Replacement Project, 93037
STRUCTUREREPORT=====______________________
' PROPOSED STRUCTURE REACH ID No. SDCB005
Location : North 180980 . 1822
' Str Type TYPE 2 MH East 1657955 . 9063
Str Cat Catch Basin Rim Elev 52 . 1600
Area/sump: 15 . 90 sf/2 . 00 ft Bottom El : 44 . 9000
Cont Area: BA217 Hgrade El : 47 . 3384 ft
Bend. . . . . : No special shape
Ent type . : Area/sump :
' Ent Loss : 0 . 000 Exit : 0 . 000 App Vel : 0 . 075 Junct : 0 . 029 Bend: 0 . 000
Reach <Invert> <Diam> < n > <End>
P101 47 . 000 12 . 00 0 . 012 Lower
P105 46 . 900 12 . 00 0 . 012 Upper
' EXISTING STRUCTURE REACH ID No. SDCB006
Location : North 181103 . 2874
Str Type TYPE 2 MH East 1657954 . 3319
' Str Cat Catch Basin Rim Elev 53 . 7300
Area/sump: 4 . 90 sf/2 . 00 ft Bottom El : 48 . 7300
Cont Area: BA218 Hgrade El : 50 . 9976 ft
' Bend. . . . . : No special shape
Ent type . : Area/sump:
Ent Loss : 0 . 000 Exit : 0 . 000 App Vel : 0 . 000 Junct : 0 . 000 Bend: 0 . 000
' Reach <Invert> <Diam> < n > <End>
P101 50 . 730 12 . 00 0 . 012 Upper