Storm Drainage Analysis & Report
-~---- ---. ----.---
n
I
LJ
11
I
U
n
U
n
I
U
r
u
n
,
U
n
LJ
C
C
n
LJ
n
lJ
C
n
u
n
LJ
n
LJ
r
u
n
I ,
U
n
I
u
n
LJ
torm Drainag
nalysis and
#0006
eport
Site Location
Middle Road Plat
Prepared For"
Yelm Development Co
16106 - 54th Place West
Edmonds, WA 98026
Prepared By"
n
LJ
11
LJ
n
LJ
n
lJ
n
LJ
n
LJ
n
LJ
n
U
c
n
U
c
n
LJ
c
n
U
n
U
r:
u
c
o
n
LJ
TABLE OF CONTENTS
SECTION
PAGE
1 Introduction
2 Existing Conditions
3 Infiltration Rates / Soils Report
4 Wells and Septic Systems
5 Fuel Tanks
6 Sub-Basin Description
7 Analysis of 100-Yr Flood
8 Aesthetic Considerations for Facilities
9 Facility Sizing
10 Covenants, Dedications, Easements
11 Property Owner's Articles of Incorporation
11 Erosion Control
1
1
1
3
3
3
4
4
4
4
4
4
APPENDICES
A. Project Maps
Vicinity Map
USGS Regional Topography
100-Yr Flood Map (FEMA)
Basin Map
Water Quality Treatment Area Map
B Calculations & Computer Analysis
Facility Sizing
Waterworks Computer Modeling
C. Supporting Documentation
Soils Data
Soils Map
SOil Log Map
D. Maintenance Schedule
SKILLlNGS-CONNOLL Y, INC.
Consulting Engineers
Yelm Veterinary Clinic Expansion
Storm Drainage Analysis & Report
r
u
[I
LJ
n
I
U
n
U
n
LJ
c
n
I
LJ
n
I
LJ
n
LJ
r
LJ
[I
~
c
c
c
c
o
n
U
c
c
SECTION 1 INTRODUCTION
The Middle Road plat is a 22 lot residential development located on the north side of Middle
Road in the City of Yelm The land is currently pasture with a few large pine trees dispersed
throughout the site The project includes the addition of 22 residential lots for single family
homes, new roadways and sidewalks, sewer and water services and stormwater facilities to
treat and dispose of the project's stormwater
The project is located in Section 19, Township 17N, Range 2E W M The Thurston County's tax
parcel numbers associated with the project are 64303500504, 64303500300 and 64303500400
The project will add approximately 2 32 acres of impervious area Increase in stormwater runoff
resulting from the addition of paved surfaces will be mitigated by an infiltration basins sized to
infiltrate 100% of the 2-yr, 24 hr design storm The facilities will also be sized to retain and
infiltrate the 100yr- 24-hr storm event. This storm drainage and analysis report is being
prepared in accordance with the Washington State Department of Ecology's Stormwater
Management Manual for the Puget Sound Basin (The Technical Manual)
Facility sizing and design calculations are in Appendix B of this report.
SECTION 2 EXISTING CONDITIONS
The existing plat site consists of approximately 4 15 acres The site is flat with the exception of
a two-foot rise in the northeast corner of the project. The area is currently used as pasture land
and is covered with grass The frontage road, Middle Street is a 24-foot wide asphalt roadway
with a shallow roadside swale, which is used to collect and infiltrate stormwater
There is an existing mobile home located in the southeast corner of the site that will be removed
prior to construction of the development.
No well-defined downstream drainage courses can be found It is evident in the existing
condition that storm runoff percolates rapidly and none leaves the site
SECTION 3 INFIL TRA nON RA TE / SOILS REPORT
Site soils are identified by the Soil Conservation Service Soil Survey of Thurston County,
Washington as a Spanaway gravelly sandy loam, a Type 'B' soil This soil is characterized as
very deep, somewhat excessively drained and formed on terraces
An investigation of the site soils was performed by Skillings-Connolly, Inc. and in essence
verifies the presence of the Type 'B' gravelly sandy loam soil for the site
Soil tests holes were dug in the project areas to confirm the soil types match the SCS soils A
soil log map is included in Appendix A of this report. Based on our previous work with project in
this area, the sandy soil has a subsurface percolation rate in excess of 20 in / hr A
conservative rate of 15 in / hr is used for design to include a factor of safety for possible siltation
of the pond bottom over time
SKILLlNGS-CONNOLL Y, INC.
Consulting Engineers
Yelm Veterinary Clinic Expansion
Storm Drainage Analysis & Report
J
LOCAL ACCESS RESIDENTIAL
NOT TO SCALE
,J
]
RIGHT OF WAY
60'
NEIGH80RHO~D C5'LL~CJnR
NOT, SCA
DATE
ESIGNED BY
i 8TERED BY
l-'!HECKED BY'
I FROJ. :NGR.
j-
1!
; I
LI M~; r:OO')'jool ".""
8. MATTHEWS
T SA TER
No.1 DATE
!
I
R. '~ONNOLL Y
rl"!" ;'"'-(Xl06f3l.l
.: 't ~i:8 Ii ler) 1 .35 jr"","1
EX FENCE ~
-I !
C0
EXISTING HOUSE TO BE
REMOVED ANO SEPTIC
SYSTEt.A TO BE ABANOONED
PER D.O.H. REQUIREMENTS
"
"
REVISIONS
CONTRACT NO.
I
!YEL../,
SkilliNGS ' CONNolly INC.
CONsulriNCi ENCiiNEERS
I ."...", _ =---:..:J
CIVIL TRANSPORTATION ENVIRONMENTAL
,... 61..ACU tIII.\l'IL elL I.ACIY, l1A ~
NIM891..\TftI'I MJl ~...RI7
I
I I
I I
I I
! I
I I
! I
I I
! I
I I
I I
I I
! I
I I
! I
I I
! I
I I
! I
I I
! I
I I
- S 89'722' E
w(':;;11 l
~I~ I
~1~ I
. ~ 6430~500400 I
N~[;~[:~ i:~
biOI'"
~L i z
... .....----
01(0
,Z
O I I
,1.: !
I SECTION 19 TOWNSHIP 17N RANGE 2E W M III: I
IJ '! ~ i
I -----'----------l - ...1.1 I V
6800' 50.00' 52.0CY 54.00' 58.79' I VERTICAL DA ruM
_ NGVO 1929
IJ I SURFACE t.AON. AT INTERSECTION OF
'v'? FIRST ST. AND RAILWAY RD.
I I~ 5 ;., .. 0' ::.!, v'? ,-~CALE IN FEET, AT ELEVATION = ~~2.179
I j 1""'"0 8:;? 9 ~t::r-? 0 20 40 80
~ N 7: ~ 0\ I .., BASIS Of BEARING
I J ~ I I 6 a>;:.1 SHORT SUBOIVlSION NO.
........- ~ 1491;:; "'. Ii rr--~ SHS978187Yl
IJ
IJ
I
IJ
~J
I
IJ
, " "~
'J " "
i "~,,~ ""'~~""-:
I """,, "\.. ~ ~;~"
(' 0 ""~'".:.~.,,
,(r> ('" " ' ~""" " ABANDON
i " " ~ "', EX WELL-
iJ '~ ">4ro ~X< ~R D.O.E.
;j j ROW "~~a ~~\\-$!" 20
!J I I]l _ 8 II ~J ~I '~~~~,.'~~ "
IJ f- -J2::~;!+~~~ o=i2:':~",,"+-ALK ; " ,
I 10 7.5 7' 11' 11' 7' 7.5' 5' 10--j
56'
. RIGHT OF WAY
0'" 0
ROW) \ ROW
]=", \ " ~ '"'''' ,
I ,,L Jt, ~ 8 ~ J,I,,, ~".~" . I
I 2'1 I~ I CURB -, f-0.5' I 0.5'-< rCURB -+ 1~' I
O' ," 7' 1 16 16' I 7' " . 0 ---J
r- ,r-~-,---- i I I -,',
':'.'
", "1.-
"~.,
" ~.
" '"
-.....::,,\3'~
"~<
S 89"29'56" E
76.70'
oS'
'-"6'
..J.,'if~S~
"..?..>,J.. ,,",'
, 'Z ;;1."').;~-i
"'-/'" /.,~"-
OVERALL SITE BOUNDARY LINES
NOT TO SCALE
M~DDlE ROAD
PLAT
!
!
;-\~i
VICINITY MAP
NOT TO SCALE
APPLICANT.
'!'ELM PROPERTY DEVELOPt.lEN T L.L. C.
21709 96th AVE W
EDMONOS. WA 98020
(425) 778-7211
OENNIS BAlASClO
SITE
ADDRESS:
16422 SE MIODLE ST
'!'ELt.A. WA 98597
ENGINEER:
SKIWNGS-CONNOLL Y ING.
P O. BOX 5080
LACEY WA 98509-5080
(~60) 491-~~99
BRIAN t.AA TIHEWS. P.E.
TAX PARCEL NUIlBERS:
64~0~500504
64~D~500400
TOTAL SITE AREA:
UNOEVELOPED AREA:
PROPOSED PLA T AREA:
DRAlNAG( AREA:
NE T AREA:
1 ~A 1 ACRES
9.26 ACRES
415 ACRES
0.~8 ACRES
~. 77 ACRES
ZONING;
PROPOSED DENSI TY:
TOTAl. NUMBER or LOTS:
R-6
5.6 UNITS/ACRE
22
WATER:
OTY or '!'Eu.t
INDlVlOUAl STEP SYSTEt.A
PUG(T SOUNO ENERGY
INOIVlDUAl DRYVo€LLS ANO ON-SITE
RETENTION BASINS
SEWER:
POWER:
STORIl DRAlNAG(.
BUILDING SETBACl<S:
F'RONT . ,~.
SIX .. ~. OR 10' IF' NEXT TO ROAD
8ACK .. 25'
LEGAl DESCRIPTION:
LOT ~ OF THURSTON COUNTY SHORT
SUBDIVISION NO. SS978187YL AS
RECOROED SEPTEMBER 16, 1997
UNOER AUDITORS FILE NO. ~109448.
AlSO. LOT A OF BLA-03D9, RECORDEO
OCTOBER 25. 1985 UNDER AUDITOR'S
FILE NO. 8510250041 RECORDS OF
THURSTON COUNTY WASHINGTON.
J06 Nl.ItoIBER
00006
PRELIM!NARY PLAT
91((1
1
CF
1
9-4(ETS
n
LJ
n
U
11
~
I'
I
U
rr
I
U
II
LJ
n
LJ
n
!
u
II
u
n
u
II
LJ
c
n
u
c
n
,
LJ
n
L1
n
I .
U
o
Il
U
SECTION 4 WELL AND SEPTIC SYSTEM
Each lot will be served by City of Yelm STEP collection system The holding tank is maintained
by the city and is pumped on a regular basis
Domestic water will be provided by the City of Yelm's water distribution system
There is an existing well on the project site The well was originally used for irrigation and to
water the livestock. Preliminary research has not found any water rights granted to this existing
well The well will be abandoned in accordance with the Thurston County Department of Health
and the Washington State Department of Ecology requirements during construction
SECTION 5 FUEL TANKS
There are no known underground storage tanks in the immediate area
SECTION 6 SUB-BASIN DESCRIPTION
Local topography and the surrounding roadways preclude any off-site contributions of runoff
The on-site area can be broken into two sub-basins for treatment and for retention The North
Basin will have the majority of paved surfaces The stormwater from these surfaces will sheet
flow over a vegetated filter strip to the retention basin in Tract S which is shown is Figure 1
The South basin will be treating and infiltrating runoff from the frontage road and a portion of the
west roadway Catch basins will collect the runoff which will be conveyed by piping to the
stormwater facility The facility will consist of a vegetative grass strip and underground
infiltration facility
The North basin will be treating and infiltrating runoff from the frontage road and the eastern and
northern area of the project. Three treatment areas are utilized to ensure that a 20 minute
residual time in the vegetative biofiltration strips is met. The water quality enhancement will
occur in Tract S of the project. This is shown in the Water Quality Treatment Map Area in the
appendix of this report.
After treatment of the runoff, the water will be directed to underground infiltration galleries
consisting of perforated pipe and drain rock. These structures have sufficient storage capacity
to hold and infiltrate the calculated runoff volumes The facilities will be drained within 24 hours
after the end of the storm event.
The biofiltration vegetative strips are sized per the DOE Manual based on contributing
impervious area. The facilities were then checked hydraulically for compliance The
calculations are included in the appendix of this report.
Runoff from the roofs will be directed to individual drywells located on each lot. Pervious areas
such as landscaping and grass areas were included in the hydraulic model analysis Driveways
for each residence were included in the impervious areas of the hydraulic model
SKILLlNGS-CONNOLL Y, INC.
Consulting Engineers
3
Yelm Veterinary Clinic Expansion
Storm Drainage Analysis & Report
n
G
n
I
LJ
n
,
LJ
n
LJ
n
I
U
n
LJ
n
I
LJ
n
u
SECTION 7 ANAL YS/S OF THE 100-YR FLOOD
The site is not subject to flooding during a 100-yr, 24-hr storm event, nor will development of the
site contribute to flooding on downstream property A copy of the current FEMA Flood
Insurance Map is included in the appendix at the end of the report.
SECTION 8 AESTHETIC CONSIDERA TIONS FOR FACILITIES
The basins will feature gentle side slopes at between 3 and 4 horizontal to 1 vertical The
underground infiltration galleries will be covered with grass after construction is completed They
will be constructed so that during the summer months the gentle slopes will facilitate use of the
area as open space
SECTION 9 FACILITY SIZING AND DOWNSTREAM ANAL YS/S
The basin was sized and analyzed on water works software using the Santa Barbara unit
hydrograph method for a 2-yr, 24-hr Thurston County storm event. As previously described,
conservative infiltration rates were used for the design calculations Please see the calculations
in Appendix S section of this report.
A downstream analysis will not be necessary for this site because 100% of the 100-yr, 24-hr
event will be infiltrated
SECTION 10 COVENANTS, DEDICATIONS, EASEMENTS
r: The storm management facility for this site will remain privately owned and maintained A
U maintenance agreement should be executed to ensure future maintenance of the facilities
n
lJ
n
,
u
c
n
,
LJ
n
u
n
,
U
n
U
n
U
o
r:
u
SECTION 11 PROPERTY OWNERS ARTICLES OF INCORPORA TION
The articles of incorporation will be completed and submitted at the time of final plat approval A
copy will be added to the final drainage report by addendum
SECTION 12 EROSION CONTROL
Erosion control features and a construction sequence will be included on the construction plans
If properly administered, the erosion control features will provide sufficient protection from
sedimentation migration The site is flat, possesses extremely porous soils and will remain
vegetated along the perimeters while grading activity occurs A construction entrance will be
included as part of the erosion control features
SKILLlNGS-CONNOLL Y, INC.
Consulting Engineers
4
Yelm Veterinary Clinic Expansion
Storm Drainage Analysis & Report
c
c
c
c
c
c
c
c
c
c
c
c
c
c
I'
lJ
c
c
c
c
APPENDIX A
Project Maps
VicInity Map
USGS Regional Topography
100 Year Flood Map (FEMA)
Basin Map
Water Quality Treatment Area Map
SKILLlNGS-CONNOLL Y, INC.
Consulting Engineers
Yelm Veterinary Clinic Expansion
Storm Drainage Analysis & Report
n
U
n
U
11
LJ
c
f'
LJ
n
I
LJ
n
LJ
n
I
u
n
U
n
LJ
n
I
U
['
I
LJ
[1
,
u
n
LJ
n
LJ
f'
LJ
n
LJ
c
n
U
RAILWAY T SE
VICINITY MAP
NOT TO SCALE
SkilliNGs ... CONNOLLy INc.
CoNsulriNG ENGiNEERS
TITLE
WADE MIDDLE ROAD
PLAT
1
J
\
U
n
U
11
U
I'
U
n
U
r
U
(I
u
11
U
c
r'
U
n
U
Q
n
U
r
l \
;201
\
i
I,
30:'L
':=.
.;,
-.~' :J
~>-
:2<:r
-0
--'''C
~-'
4
~
-"
'6
o
.<:'>.')
r~
-'\
: .Cl
, -
I
II
USGS REGIONAL TOPOGRAPHY MAl'
Middle Road plat
Yelro, WashlUgton
00006
Skillings-connolly, lne
ConsultlUg Engineers
z
o
t-
O
:I:
a:
\
\
fEfV1P, r Jijl.rA ~ f'\f
C i'l( );: '{ fLf.0
I _. I \ .\.'0 ~- "'3 o~-"V\\
0>f>',"^"-^' -'-j \k,^~' / -:) j U \0 v--\ Ii
E FECi! V C ' / -:ie'" "- \ t; J \ 9'1"\
~~
~
o
"'<<.-
~/...~'?-
~o
cpq;.
/
r-
_J
-"\
\
~\
. \
\ \
<, \"'r,c j::..@...tPr
~ ,....
l.-
D
1038.0 AVENUE
[I ~1,
U
r L\
\
U
r '-
u
r
rJ'
I
[J
I
[J
IJ
I
[J
I
[J
I
(J
I
II
IJ
[l
IJ
lJ
I~,~"" ,() 0
I] I I Jl ~ '~Il ~ I I
,IJ I ; P~~N~~r=A;~!NG I D~~';:~G I D~';:~G I 05'-j"';~~:~G I SIDEWiLK I
110 -t-7.5----J-7'~ l1--r--l1'---r-7'-r-7.5~ 5'-r-10i
56'
I RIGHT OF WAY
I LOCAL ACCESS RESIDENTIAL
lJ /" NOT TO SCALE
I 0""
[~.ASEMENT ROW ;/
II] I "L Jt, ~ Iii ~ ~ ,L, "".,"
I I . 2'--' 1- . I ~~RB -; 105' .
~ 10 i r- 5 --r- I I 16
IJ
-,
j
------
ROW
o
[
ROW
05'--' r-CURB I <.1 j2' o--i
I " ---:- "-j r--
16' ,
RIGHT OF WAY
60'
NEIGH80RHO~D ~LLECTOR
NOT I SC
DATE
REVISIONS
l~'IESIGNED BY,
::NTERED BY'
-CHECKED BY'
PROJ. ENGR..
B. MATTHEWS
T SA TER
NO.1 DATE
i
R. CONNOLLY!
o
DlIlCl: NJOC6ool,~ .I't'J
'r!'f: ZS{)()()68~ -.: 4 'n~B. 4/11 'rjn 1 .:::: h,V\"I
SECTION
19 TOWNSHIP
1 7N RANGE 2E W M
I 50.00'
;"
'"
;:2 5
;.,
4.91 ~I 6 ~I 7 gl 8
;;;
"T"
COO TRACT NO.
;"'?". 22
r-. -I
~- --
II
'I
-u'
~
9
~?
.
./
74 4.5'-'
,,- '~L=3.05-:--
I~rg: ././ 14
! ,,:;,..,:/
I I"'
:! , ! 90.00
------.1"
-----
15 ------ - . --
r I
90.00' I _ !I'll III
'/1
90.00'
r
r
(2)
EXISTING HOUSE TO BE
REMOVEO ANO SEPTIC
SYS'lDol TO BE ABANOONED
PER O.O.H. REOUIREMENTS
SkilliNGs " CONNolly INC.
CONsulTiNG ErolqiNEERS
TRANSPORTATION ENVIRONMENTAL
J01IIACU IILWL alL LAC:lI1". VA tlGM:f
_.n99 ""'''-'-H77
YELM
~
I
~
VERTICAL OA ruM
NGVO 1929
SURFACE MON. AT INTERSECTION OF
FIRST ST. ANO RAIL WA Y RD.
AT ELEVATION = 332.179
SCALE IN FEET
I ....
- 20 40 80
BASIS OF BEARING
SHORT SUBDIVISION NO.
SHS978187Yl.
. - S 89'7'22- E
w('~i-;~ l
~q~ I
bl~ I
t 64.303500400 I
"'11 b 'l il:"~
... I I
~~ .
. ----
0100
z
oS'
'!'6'
Jr~-'!s~
.">).'1_ .;,,'
'Z ->iW"-'
~-e. ",..",-
OVERALL SITE BOUNDARY LINES
NOT TO SCALE
MIDDLE ROAD
PLAT
Nf:..
S 89"29'56" E
76.70'
'-
i
VlCINITY MAP
NOT TO SCALE
APPLICANT.
YELM PROPERTY OEVELOPMENT L.L.C.
21709 96th AVE W
EDMONOS, WA 98020
(425) 778-7211
DENNIS BAlASaO
SITE
AODRESS:
16422 SE MIDDLE ST
YELll. WA 98597
ENGlNEER:
SKIWNGS-CONNOLL Y INC.
P.O. BOX 5080
LACEY WA 98509- 5080
(360) 491- 3399
BRIAN MA TTMEWS. P.E.
TAX PARCEL NUllBERS:
64.303500504
64303500400
TOTAl SITE AREA:
UNDEVELOPED AREA:
PROPOSED PlAT AREA:
DRAINAGE AREA:
NET AREA:
13.41 ACRES
9.26 ACRES
4.15 ACRES
0.38 ACRES
3.77 ACRES
ZONING.
PROPOSED OENSlTY:
TOTAl NUMBER OF LOTS:
R-6
5.6 UNITS/ACRE
22
WA TER:
SEWER:
POWER:
STORM ORAlNAGE.
aTY OF YELM
INDIVIDUAl STEP SYSTEM
PUGET SQUNO ENERGY
INOIVlDUAl ORY'o\€LLS AND ON-SITE
RETENTION BASINS
BUILDING SET13ACKS:
FRONT _ 1~'
90E - 5' CA 10' If' NEXT TO ROAD
BACK - 23"
LEGAL OESCRIPTION: LOT 3 OF THURSTON COUNTY SHORT
SUBOIVlSlON NO. SS978187Yl. AS
RECORDED SEPTEMBER 16, 1997
UNDER AUDITORS FlLE NO. 3109448.
ALSO, LOT A OF BLA-0309. RECORDED
OCTOBER 25. 1985 UNOER AUDITOR'S
FlLE NO. 8510250041 RECORDS OF
THURSTON COUN TY WASHINGTON.
...00 Nt.,Ir,lBER
00006
D
:MEET
C>
1
<:H(ET'S
w
--~I.
~"'!
0'"
z
TfrIlT"'fIN~
~ -,-
1J-'
IJ
~
IJ
o
I
IJ
I
IJ
/~
C
I
[]
I r" '"
[] t.. SOltTH >~::"
/J ,e :1"'''!tTA ""<:'~'.
1 ) 8./I-I} ROW"
p'__ I Jl ~ _" g Il~. ~I "'~t
I PLANTING PARKING DRIVING DRIVING PLANTING SIDEWALK
I] I I CURB -j r- O.~' I LANE I LAN.E I 0:5'-j r- CU~B I . I I
1--- '-r-7.5--r-7 --r-- 1'---r-- 1'--r-7 ~7.5--r 5 -r-IO----j
56'
I I RIGHT OF WAY
[] .~ LOCAL ACCESS RESIDENTIAL
. NOT TO SCALE
I Q
E~", 'OW \;1
; I Q Il
" W
o 1- I
! I. 2'1 ~ I CURB -j 10S
_ 5' --l-- 7' 16'
[] ~ I I
SECTION 19 TOWNSHIP 17N RANGE 2E W M
--I
54.
TIt_mClf.,
"A~J:A .Oft
I
SIOEWALK
50.00
j
';"
'"
...;
,....
o
..,
8
"'"??
5
~
oj
'"
7
6
----
~
"~// T~f!AT"'f,
,~~J'i MP .~.
~" " . /
" s~'i ,"" '
-, ( "
. '
" ' '
~',
,~"'"
" ''-
-:.rn. ''::
. --!4~5"
~
14
~
'---J<<
"-
15 '---
90.00'
90.00'
16
-~~ - ~ .~ III II II!
69.reo- _
I I
I
SS;-S;alll: I
I
I I
I
I
~~
r ~ ~ -
9
f0 EXISTING HOUSE TO BE
\.J REMOVED ANO SEPTIC
SYSTEM TO BE ABANOONED
PER D.O.H. REOUIREMENTS
ROW
EASEMENT
I
w
PLAN TING
PLANTING SIDEWALK
OSI r-CURB I 1 12' . I
. '_S'-r--'O~
16 I 7 I I
~
RIGHT OF WAY
60'
N EIGH80~~p~OSC~Ll"ECJOR
YEUv1
I ~)ES1GNtT .=0
I.N TERED 8
n:liE C!< EJ E
.('I.'I'ROJ. ;:~~G'
r:-=:--~
DATE
8. MATTHEWS I No.1 DATE
T SA TER
REVISIONS
C~ TRACT NO.
SkIlliNGs .- CONNolly INC.
CONSulriNG ENGiNEERS
R. CONNOllY
TRANSPORTATION ENVIRONMENTAL
~, I.AC:'r am. aJ. l.6Cln'. ':tAr. ~
-'.nft ..." ~.lJUY7
DOt d_n
lf~f:1 '.... Pl.l ~1'(~E8 <4/1' 1('1"\ ~<:, 1r(1~
!
t
~
VERTICAL DA ruM
NGVO 1929
SURF Acr MON. AT INTERS<:CTlON OF
FIRST ST. ANO RAlLWAY RD.
AT ELEVATION = 332.179
SCALE IN FEET
~_.-
20 40 80
BASIS OF BEARING
SHORT SUBDIVISION NO.
SHS97818TYl.
.
N~nI III ~."
~ Hlllt 7A4" loll
AtttA
TRM'I'JtlfHr
II i&4 It C I)
S 89'34'46" E S 89' 122- E
wl289.35'~
:-I~ I
<0 .
J~I~ :
'lti ~i 0=""'00 ~!~
I bl~
W I
,. I I Z
~~
. .....--
01<0
S 89"29'56" E
76.70'
oS'
~(;
..J~~.;!S.? ~
'''?..>''>;) .,,"#'
'" -;Y'l.",'l./.,-i
""'-/'" ;;..,.'
OVERALL SITE BOUNDARY LINES
NOT TO SCALE
MIDDLE ROAD
PLAT
j
VICINITY MAP
NOT TO SCALE
APPUCANT'
YELM PROPERTY DEVELOP"'ENT L.L.C.
21709 96th AVE W
EDMONOS. WA 98020
(425) 778-7211
DENNIS BALASCIO
SITE
AOQRESS:
16422 SE MIDDLE ST
YEL.... WA 98597
ENGINEER:
SKIWNGS-CONNOlL Y INC.
P O. BOX 5080
LAcry WA 98509- 5080
(360) 491-3399
BRIAN "'A TTHEWS. P .E.
TAX PARcrL NUMBERS:
64303500504
64303500400
TOTAL SITE AREA:
UNDEVELOPED AREA:
PROPOSED PLA T AREA:
ORAlNAGE AREA:
NET AREA:
13.41 ACRES
9.26 ACRES
4.15 ACRES
0.38 ACRES
3.77 ACRES
ZONING:
PROPOSED OENSlTY:
TOTAL NUIABER OF LOTS:
R-6
5.6 UNITS/ACRE
22
WATER:
SEYlER:
POWER:
STORl<' DRAINAGE.
OTY OF YEIJ,I
INDIVIDUAL STEP SYSTEJ.l
PUGET SOUND ENERGY
INOIVlDUAL DRY"M::US ANO ON-SITE
RETENTION BASINS
BUILDING SETBAO<S:
F"Rc..T _ I!)'
90C _ ~' OR 10. If' NEXT TO ROAD
BACK - 2~'
LEGAL DESCRIPTION: LOT 3 OF THURSTON COUNTY SHORT
SUBDIVISION NO. SS978187YL AS
RECORDED SEPTEMBER 16. 1997
UNOER AUDITORS FILE NO. 3109448.
ALSO. LOT A OF BLA-0309. RECORDED
OCTOBER 25. 1985 UNDER AUDI TOR'S
FILE NO. 8510250041 RECORDS OF
THURSTON COUNTY WASHINGTON.
JOB NuwSER
00006
'J4EEl
'NA
"}iE(~
CF
c
r
L
[
[
[
[
[
C
[
[
[
[
[
r
~
I'
LJ
c
c
c
r
u
APPENDIX B
Calculations & Computer Modeling
FacIlity SIZing
Waterworks Computer Modeling
SKILLlNGS-CONNOLL Y, INC.
Consulting Engineers
Yelm Veterinary Clinic Expansion
Storm Drainage Analysis & Report
n
, ,
U
n
,
U
[l
U
r'
LJ
[l
l.J
11
LJ
[l
l.J
[l
LJ
11
U
11
U
11
I
LJ
11
I
U
11
LJ
n
LJ
['
lJ
I'
LJ
n
lJ
n
I
U .:...
I
n !~
u
SkILLINGS; CONNOLLy INC.
CONsuLTiNG ENGiNEERS
Project Name ~Y\\ DDlt: :l? 1) c.. Uo,.,
~ '""\~. "'I
Project No ( ./'CU UI..O
Date L/ 110) OJ BY' ~,Kt"
Sheet: Dr6\-"':Je... ccJ (' c.... \cJ! 0'1\..5 Page ~ of _
PO Box 5080
LAcEY. W" 98509 5080
}60!491-n99
FAX }60/491-}1l57
5D.-nH bAS!:-4
8
~
~
FAV to /< OH:U v.JAY
( 3k' w V. 220' L,<)~
I
f refIT f6c R. D
::=- 7) 920 -sr;
:::
O. \ 8 Ft<..
,:::;
~
~
;,.L
IP1~U0IwS Ai~Ef)
'-.)
( /0 \rl ~ .2LfO'L. )
~ 3J~l.\O':'r
D,O'1~,-
~\Vt=\JAYS
'1 oQ.~ ~ IO'v-.) *- ~d L
:: ~ 7CO.3';
D, O~ Pre
"'5I.DEWAL..K$
I LJ'"
5,..J* )OL
L h)dvJ es ~Df\If'G.E'
::0
2) 0505r
;:=
o I oSl"Je
R DOF ~f.ZcF\S
Z-
~ +-\Orl)f:S ~ 1)700:5J;
/5) 300 SF
- 0, 35 fTc..
,uIAl 'M~V\C)() j tlKtA.;: 0, l3A<-
rer i) IOU S A (<~A
3
t../l!fXY).,,~ )5,3O:J-:5F (t10\A~s) - ?il00~ ~DK:,.Ji)
~ t'V"O - \ - ~....,,\ ""? ("1..10 iJ,\.,.
-';,0_ :5fC'SD.Ji:)- /j1,,::J../f.!.J)hJa -")16. t,'1
I oTAL pE.~V IC\J.-'.> f-i/J..t;A = /5; /10 - ~'F" = 0,35 I fie:...
AS ~'(\J\1~
FI.t,LL
!2., J I r,~
~...., _l
)..1' ! )OR.i'f ';..t.'= 0 r:: -:-rR.~~~
~5~u.)\)::-0 A VE ~ K:~;;;:; i-i}(.7:':-;, H2uno(.( "11 1\ ue... ..:1\(ecie,;1 +0 lYl;h vidu.cJ jv'j ~Je. \\,.$,
'2,/ ...J 0 I.'." ,,: ~\""i..lt ,. - e ;"~ '~L' "''''"''__ _._'-""_ !:2 3 -J :- ,~ II P -i: -,-, ~C\ A ,~S.; r O'\~;;I<-'c...
v', ~ r'I,'.o.-J I c..-;...... ....... '\ .........0;;,;.. ~ -'\ I' \ 'I J, IV, I '- \ '..c ,\ v'. .J
,t--.~ - ,L.::
r'
LJ
SkiLLINGS ~ CONNOLLy INC.
CONsuLTiNG ENGiNEERS
Project Name: }rhO\)LE:
Project No COJOf)
Date ~ 00
Sheet: DC2f\'('CICt? (c;,Jc...s
.J
R. D :P L.ft'\E
r
u
po Box 5030
LA'H. WA 93509 50110
~60/491 n99
FAX ~60/491-~857
By' E !<::. vY\
Page Z- of_
r
I
~
5ouit\ GASlt'\ CaNT.
s
,
~
I--
~
-'
[l
I
LJ
0)l-ML ?ri2EA 7.:
J [Y) r-r V\O (,IS -\- -r=' 1/ ,....,,)..5
11
L
0,73 +1L
+ Q,L\I ~
'='
Q
Q
~
'-.J
r'
lJ
::.
), J 1-/ 17<-
11
~
11
-rRtRT(T)ctlT R~tA\A.€fl1El'rr-
LJ
r
L
TgEATfYlti1JT I}l2t;C;
'A')
~E[
TrKtnJ rn t/,l;
1l/2Frf
)'1/' A-i)
/
[l
I
I
LJ
[l
Tf?CAlflJG11T A02EI-l =
~VADl,IIA'U)l fr.O'\~. f Dr\vtVJ.t'1-$
-4 1z. pe"VID<"5 flrcc~
~ vt Irrt: NT
LJ
[l
i
LJ
\"' i~~\J.~ Q, ) 8 Ac... C7-I j)eJ~1 0 ?tD
".HIJE:j
kvrr"'r 1~~0~ 0, cq A'-
Vfl v<:.Vct'1'S O. D(I/ AL I )Y)i>E;Q.v {\../U 5 1B
J !
~ fG('IJI<.M5 ,,"I(1:;.T (;), 2-P A'-
(), 54 f1L ~erv IJu~ = IS
l ~~ Au?C- LJ\ "5 -<; 0\ \ (k<;;~ 8
11
I
LJ
n
I
U
[I
~
FtJ?- W AT~ ,,,) D:Q, <::.
,I ,.., .
f..C) )' 1\0 I~ 7~
7Li ..L1.1 r-' )-.1-'
! _ i T1 /C.. 'C. v'C , i
Q=- U, \q
_~ .::= (' 2-
--. ~ ........
n
LJ
c
o
\, ~\?,[!JAL-Z RtAt\of-f: /Y1FIL..1J;:;..nt..:;. ),.)
"51 v~mw.-IT€R. jJ BE /' .;;>l~'2.v~\ v"C
,
P Lt~ ,'Ii~l(
.,I) "5'5vJ~ It
-s-""r k ' p.
If.,..
.~ --
fPCf J J C:4 ~
-=-.p., ) l~tl -~
-;~v...S;--4 .0+ L/~~~
:f" __'1,!!.\ I... :1.: -
n
LJ
2 "5t"E f01AC. ~ €D
!'
I
LJ
SkilliNGS ~ CONNOlly INC.
CONsuLTiNG ENGiNEERS
Project Name. ('fll DDLf ~l{ \) P L-AT
Project No 0000 G
Date ~O(:) By' b k\i\
Sheet: () Ai"I\ 'r0~ C,-J ( <,
J
r:.
I.
e
(
Page ~ of _ ~
n
PO Box 5080
LACEY. WA 98509 5080
,60/491 "'/9
FAX ,60/491 ,857
I
LJ
11
LJ
n
4/10/00
3 18 16 pm
Skillings Connolly, Inc
page
1
i
U
---------------------------------------------------------------------
---------------------------------------------------------------------
DETAIL BASIN SUMMARY
n
U
n
U
BASIN ID South
SBUH METHODOLOGY
TOTAL AREA .
RAINFALL TYPE
PRECIPITATION
TIME INTERVAL
NAME. Treatment Area Q calculation
n
LJ
0 54 Acres BASEFLOWS 0 00 cfs
THUR6MO PERV IMP
1. 79 inches AREA. 0 21 Acres 0.33 Acres
10 00 min CN 75.00 98 00
TC . 14.38 min 5 00 min
ABSTRACTION COEFF 0 20
11 impTcReach - Sheet L. 50 00 ns'O 0110 p2yr 2.80 s 0 0100
U PEAK RATE 0 19 cfs VOL: 0 05 Ac-ft TIME: 450 min
n
u
\J. :5 E
V e~el~\\ vE
f-\'\~ ~\~\P
n
(J2'1)
.!/
lJ
J
f: eJ.04
I =J 10' \7
n
/
Ibj
1.{ ~
}
LJ
VEqnATlvE Fll1ctL S"T1..Q.\ P
. PW-h (<=.
N"lS
n
LJ
n
,
VC~If'\f V ~ I. S 4/$C:c
Sl~:::~ ~ Zo/Q
LJ
n
Q ~ o. \<1Crs
,I
y -- 0, Ot1 _ (Yz.. )
-5 = VI u2-
~=t.f
b ~ /D'
u
:.l5''S().r;tp
II
I
U
C:c\c\>..0~
.-
~'fc:r-.:!3
.- \
:.:<2C7'l'~(-o.....\
\
...... I 1:C,
, .4. \
'-I ~ .
n
U
A=
~'" . .
U\I\ -.
v
~
-Z:j
} 0 l o,D4 ) 1- Lf l Ut &-q )~ ()/-!G'04{/
n
LJ
/"'
Lc, I cl,~h
.- .
-fuw
\, ,!1'1{ cc riJ
.,,~, . - -
n
\J:: C
-
/4
'"""
.'\ yo" /
'../~. r/ c F5
, "-Jr1''' I-
V f :~1 "ft
~ O,JI~ FI)S </,j{~
u
n
I ,
LJ
~
I' P
o ta. C-i
o
c
c
SkiLLINGS ~ CONNOLLy INC
CONsulTiNG ENGiNEERS
Project Name: r/)lpCLE f2-D Pl'Al"""
Project No Do!X:.lo
Date. 1/1/ 100 By' Bj(..m
Sheet.. Ol'tll ;1Gj-\e Gt.\c..S PaGe LJ ot
-- ~ b ~ '-----
PO Box 5080
LACEY, W. 98509 5080
;60/491-3399
FAX ;601491 ;857
[1
U
,~
-:=:X.)..fii\,
fj;....S!M
.'1, '" (I L./r'l _
i- ;rlc'c.l'- '\1";>'\ 1<1:. \ei'\~ICi\ ! 11"'1 C
~
60
/
LeNt)
I I
*OI,We
<:.
'?
--:::
,
c
@
/
10l,.,J Ice
/25' C,f
n
U
125c'lu
IQ ........ /
i '--f I~
, -
--
--
&~ 7s~<:...
-::;.,
1)(YliN
t4
h
C',<:::
W
"-c
=-
'-J
n
u
I ) JVI. I't.\ <:. '2.. 0 JV\ I V\ r~ {~ JV;e I" d a::/
n
U
T~d-
I ( -0 I ',!
20 t;J '7<~' ~
cJ, 2081
.-,-r-,l -
L '::;, vCt'
c
2S0c10,19CF(S
I 31 ~ '~':>r' = 22w,,~1
) :;J~
fI
~
Z 2 Wi ~ N '/ 2 C)'fVl ,-y)
r 2l 0")1" i!. i',d.~J
J
. ~
o ,to-
n
,
LJ
f'
I
LJ
--S I ZC
/
20 LJ lOt:" ~
(/\\1
wU [,o/\Cl,
a
, I ~
VCV"'t.! .:i~~"v\.
V
!'-.. ~ \
;-.\ rtr r
--- ;
-:;'Ti<..1 J,)
"
,
n
I
LJ
c
fI
,
LJ
n
LJ
n
LJ
n
U
n
U
I ,
f1::"> [.( i '; e
-.1' J d .
, r) 0~~",
I
I If" ( .
:.... /2- 5LHT?tLC JepTiI
I. II ,1
;>0- ? /" ::: //,) 7. "f-#
- -- \..".;'" . -- ~
n
U
n
i
U
11
u
11
U
11
LJ
n
i
U
n
LJ
n
U
n.
LJ
n
U
n.
u
11
LJ
II
~
r'
U
11
U
!'
LJ
n
LJ
n
U
n
U
fI
U
f)7,"-'N I~ R.C~,.,D D I cn-.. I
PrOject NJ.me: I !../~ \....n
Project No OC(rl.tJ
Date. 4)!Olo.J By' hi<::.rf'\
SkILLINGS ~ CONNOLLy INC.
CONsuLTiNG ENGiNEERS
POBox 5080
LACEY. WA 98509.5080
}(,0/491.})9'1
FAX } (,0/49 \ }B57
,
Sheet: 01-:: i~ Ii 1f(\..C ~A LC S
Page !5..-- of -
50tAtt1 SASIM [o,l'il\\IJCO
C",ICl,llcct.
-<,
)CD 'j/Z - 2 Y H Q. cv2rJT
4/10/00
Skillings Connolly, Inc
---------------------------------------------------------------------
---------------------------------------------------------------------
page
1
3 51 26 pm
BASIN SUMMARY
BASIN ID' 100yrS
SBUH METHODOLOGY
TOTAL AREA.
RAINFALL TYPE .
PRECIPITATION ....
TIME INTERVAL..
NAME' 100 yr storm even South Basin
BASEFLOWS'
0.00 cfs
PERV
0.21 Acres
75 00
14.38 min
0.54 Acres
THUR100Y
6 15 inches
10 00 min
AREA
CN.. ..
TC
ABSTRACTION COEFF 0.20
impTcReach - Sheet L: 50 00 ns'O 0110 p2yr 2.80 S.O 0100
PEAK RATE 0 86 cfs VOL 0 22 Ac-ft TIME. 480 min
-= ~ec~ Flo0 I<mr LE~ '1 ;"0~ 0HBJUTlf ~LOw ~.A""Tt
O - "j tV 't:<
. \W,.:"H__-- i .()\OCI~
\ ::: . 0... c63'()")
is:: C;. 02-
Z': '-/
~ ("X;!EK ~~')l.C Ap";'V~
T = "2.0,07 (\up A,lEA)
b ~ 2.0 I
IMP
0.33 Acres
98.00
5 00 min
UneeE \;= b -\/ \/ =-
T= 20,f.pI'
=:.
\
Zu -r 2..(0.08:;)4
) , I
C&lo't.\~\e
j=-loc0 AT 'TilE Sl-l4\;1 \..r""\ f" /....(,)0 R ,:>olt
\)?. pTtI
c~
'I -;:: (zo.wl- 20 )/ € = Q.8'{ IT
e,l u\./cdc.
tl 'f d r~\.\ ((,
,
1'\ ,
I-<....clc::tr ..\..;
: I
b=- 20
c\ =:~ 0, 08 -+-
J..;2 - U,
"-- -
, J' ,
F ; ~Q. ~~t^(' ,)} ,)ij
./
k=
bu
~
c -
....- =-'lA-
~. / /
- C: I -! f ~ \
J :..-
~... 4--:
; ~~)
- .
~-.:..! i
~,
i1
G
SluUiNGS ~ CONNOLLy ONe.
CONsuLTiNG ENGiNEERS
PrOject Name m iD\:>LE
Project No OCO(Jlo
Date LI / I D/ 00
R.D
PLJqT
fI
u
PO Box 5080
LAUV, WA 98509-5080
}60/491 ) J99
FAX }60/491 }8~7
By' B \<'P\
,
Page ---.f.tL of _
Sheet:
DG;tIl"'t\e
"" \ ~
----'<..1<:"--::,
n
/~0,A1i r.5tSi \.\ (o,..r-
I
LJ
r',
U
keuk.cliA Q
Q~
\ I ''')r
I L. \-,\1 ~
!I 'u\...U
;4/< O,WI
<os-
J
n
U
Yl-
w h~re.. :
n
!) = 0, D7
ft =- (b ~ + t ~:?) _. ( 2.0 L 1,09' + J..f (/, 08 ,-) .:::- '( G- I Z I
R:=c.. (). 9/1 -9+ (p'\e..Vlc<:' CG>..\c.. '}
:;;: 0,02 [2-0/0)
n
LJ
u
n
LJ
Q
I .l.f 8(p (j S; '-/7 )(C ,q,; t,'.:,iv{ ((,)_ 0-:"') 0 S-
O,u1
lJ3, 10 ~~
I'
U
c
L.} ~ ,C; Cf'5 > 0 I eCtJ c.=f'S
ChtvW\~L
O~O(f1
n
~
r;==
J
Ci3
.JJiFI L1P-ATloM :5""1t41(T14Qe-
n
I
LJ
11
~
---=--=~-
n
LJ
/
n
LJ
2./
DiJ
/
L/l"piJc.. () B'5<?7twfi'or\
;'J i..!T
IL' Pvc PEJ2..f()'iLAlc DQ.~!N {)IPE
Ct,..::;.11 t-(
i1
LJ
I VOJDS
i---- 1.1'-;
, I
m
/ Q.l..lcJ'
_. I J
1..n F! L lnAi ( :)1'\
IV) '5
j\/~'~\ C-'Jkt'"
n
U
:)J;N~
n
i .
U
n
..dlW11,.. I ",=, I_--:-r!o.\~ ,J/,\ 1~ ..:.Jpp/'< 30 I"\/fl/~
:i1i=IC7~1-1T <.II! i?fTiC !'S )5;~ /t-!/~
./(.., /TH -! ~rf(7~ ~)~
Sc":-,: ~ ",Y
(/
,
U
n
LJ
SkiLLINGS # CONNOLLy INC.
CONsuLTiNG ENGiNEERS
POBox 5080
L\uy. WA 9850'1 5080
l60/4'1I-n'l'l
FAX l60/491 -l857
n
U
Project Name t/il DO LE'
Project No 0000 (0
Date 4/11 / 00
'J ~
/<;..jA-u
.j) LA.T
hl(f../......
By' /--' .
n
<:: \' 0
-0'..(j!i\ DA51 f-.\
Sheet: .;1 .~. i -.(..it- ...... l \ ~ ---..,
Page J- of -
,
U
,- I '\
!~,;> 10-(O,"!
,~~ l~ j ~ C ! ::- .... /\(~ r A ~
)
n
U
f~ 30,,,, / i-i~
n
,.-,
\
-t d ...,.., 1tC..l) --
, (.j
\ \ - II'
rl -,
3;)",/-,,- ~ 0,5 ;;=- !-'J/'I)4fi-
u
11
, ,
U
n
L = 10'
As;:: .SJ JiOfY)
Lrol~~~ of
?()/f.-f~Cf: #IZEfr::: JD ' J.. lj I = t..j() Ff "2..
I
"- ~ 0A~
STOi2A6-€
.c--::: II <'. -t l^ '-J. \ / _1 I' \
-::::::> iJ) / T I V<.J\C7\ t\~(\l
(~ ~ Q\ 5
.ft- / .f"'- . ~ r \
, '-.";''5 \ {---~ \
'-
--.....---.------
0 \ 0 D
/,0 13< @ I~
z.o '(, 0"7 32- C Inc.lr..\.de.. \
, ^ Z 53 ,-. 1\
5.() ($?') ,~ ' ~~ )
4.u z J. '"<', 7'0 0'1 111----'
---' .-'
u
n
Q:= jJ ~
~ -f~,,- As
!- e.. )
LJ
n
L-- -
u
n
LJ
11
I
U
n
I
LJ
11
LJ
f1
LJ
n
I
U
n
r---.---------------------.- .
Q
J,
- .
/
I / ----L-_
Y , I
\ '\~ I
.,,!
u
n
I I
U
n
,
U
n
=
i -" i
, 2S .-r'-/i-\ R
\
( j I - I
! n f.-( ) V"'- ') (JY',
&Sff'.- \
/ 1"25 FT}t-l(L 7?- 6 +10 >.!- Lj OJ fT'-
10
Uep+'--> +-0 dI?5-J(,v~ ~ye~
~5>(A~
j
(' ~ _.
1, ~jf ~i
1'J- h ~ (),L{ =
Uo~
2 .(.~ J_ \
\7
,-
I
. '\ /
----~r=-.
-- J
u
c
c
4/11/00
10 24 19 am
Skillings Connolly, Inc
Middle Road plat
00006
BKM
page
1
BASIN SUMMARY
---------------------------------------------------------------------
---------------------------------------------------------------------
fl
LJ
BASIN ID 100yrS
SBUH METHODOLOGY
TOTAL AREA .
RAINFALL TYPE
PRECIPITATION
TIME INTERVAL.
NAME 100 yr storm even South Basin
c
c
o 54 Acres
THUR100y
6 15 inches
10.00 min
BASEFLOWS
o 00 cfs
PERV
o 21 Acres
75.00
14 38 mln
AREA
CN. '"
TC .
ABSTRACTION COEFF 0.20
impTcReach - Sheet L 50 00 ns:o 0110 p2yr 2 80 s 0.0100
PEAK RATE 0 86 cfs VOL. 0 22 Ac-ft TIME. 480 min
n
.,
U
[I
U
BASIN ID' South
SBUH METHODOLOGY
TOTAL AREA. .....:
RAINFALL TYPE
PRECIPITATION .
TIME INTERVAL.
AREA.. :
CN ....
TC.. .
NAME. Treatment Area Q calculation
o 54 Acres
THUR6MO
1.79 inches
10.00 min
BASEFLOWS
o 00 cfs
PERV
0.21 Acres
75.00
14 38 min
r
LJ
ABSTRACTION COEFF' 0 20
11
I impTcReach - Sheet L. 50 00 ns:O 0110 p2yr 2.80 s:0.0100
LJ PEAK RATE. 0.19 cfs VOL. 0 05 Ac-ft TIME 450 min
II
,
,
L1
r'
I
L1
II
,
L1
c
f'
G
n
LJ
n
U
n
LJ
fI
I ,
LJ
n
LJ
IMP
o 33 Acres
98 00
5 00 min
IMP
0.33 Acres
98 00
5.00 min
n
U
4/11/00
10'24.19 am
Skillings Connolly, Inc
Middle Road plat
page
2
"
00006
B~
u
---------------------------------------------------------------------
---------------------------------------------------------------------
"
STAGE STORAGE TABLE
u
n
U
CUSTOM STORAGE ID No South
Description South Basin infiltration struc
"
u
STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE---->
(ft) ---cf--- --Ac-Ft-
(ft) ---cf--- --Ac-Ft-
(ft) ---cf--- --Ac-Ft-
(ft) ---cf--- --Ac-Ft-
"
========================================================================================================
LJ
o 00 0 0000 0 0000
1 10 17 600 0 0004
2 20 35 200 0 0008
3 30 59 300 0 0014
4 40 75 400 0 0017
4 00 69 000 0 0016
4 00 69 000 0 0016
n
U
11
u
11
I
G
~
I
u
11
U
"
u
"
u
11
G
n
U
n
U
n
U
n
U
n
U
n
I :
U
[
11
U
n
u
n
U
n
U
n
u
11
u
n
LJ
n
I
u
I'
lJ
n
u
rr
~
n
LJ
n
u
n
LJ
n
I I
LJ
n
U
n
u
4/11/00
Skillings Connolly, Inc
Middle Road Plat
page
3
10 24 19 am
00006
BKM
---------------------------------------------------------------------
---------------------------------------------------------------------
STAGE DISCHARGE TABLE
DISCHARGE LIST ID No South1
Description South Basin Infiltration
STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE--->
(ft) ---cfs-- -------
(ft) ---cfs-- -- ----
(ft) ---cfs-- -------
(ft) ---cfs-- -------
========================================================================================================
1 00 55 000
2 00 60 000
3 00 65 000
4 00 70 000
11
I '
LJ
11
~
11
~
n
LJ
n
J
n
LJ
n
LJ
Il
U
n
u
n
LJ
11
I
LJ
n
LJ
n
I
LJ
11
I
LJ
n
LJ
'l
U
n
u
Il
LJ
n
LJ
4/11/00
Skillings Connolly, Inc
Middle Road Plat
10 24 22 am
page
4
00006
BKM
---------------------------------------------------------------------
---------------------------------------------------------------------
ROUTING REPORT
STORAGE LIST
Description
ID No South
South Basin infiltration struc
DISCHARGE LIST ID No South1
Description South Basin Infiltration
ROUTING CURVE
STAGE STORAGE OUTFLOW
0+2S
STAGE STORAGE OUTFLOW
0+2S
STAGE STORAGE OUTFLOW
0+2S
(ft)
(cf)
(cfs) cfs-min
(ft)
(cf)
(cfs) cfs-min
(ft)
(cf)
(cfs) cfs-min
===~=====~============================================~========================================================
o 00 0 0000 0 0000 0 0000
1 00 16 000 55 000 55 053
2 00 32 000 60 000 60 107
3 00 53 000 65 000 65 177
n
u
11
u
11
,
LJ
n
I
U
[I
I
U
11
LJ
rl
u
"
LJ
rl
LJ
o
N
~
I-
U
C
'.0
~~
01",
~
a:
.c:" .--c \ '-..i i
...;Jvi)\ M :I.rrL'. 1 ((>.-1' (':'1\ bA c, '\
LEGEND
Basin id 100yrS
Hyd No. 1
"
"
"
"
, '
"
, '
, '
, '
, '
, '
, '
, '
, '
, '
, '
,
3
6
9
12 15
Title in Hours
18
21
24
LJ
\l
I'
I
L.J
n
~
\l
I
LJ
n
~
11
~
n
u
11
u
11
u
11
U
IJ4fw)
P \-5 (. ti jC-~
Dro..\l\s i)J ,,";"-\-\) r-\
!oj 3 H RS
27
k~ I Y) nl")
:: f .::rf\
,.
.......:- /" \
iJ . '.)t.)( ('~
n
l1
r
U
Hyd No. . 100yrS
Rate: 0 86 cfs Time 8.00 hr
Vol 0 22 Ac-ft Tnt 10.00 mln
Hyd No 1
Rate 0 86 cfs Time 8.17 hr
Vol 0 22 Ac-ft Tnt 10 00 min
11
LJ
n
I
U
II
u
11
U
II
I
LJ
11
~
n
u
II
u
11
,
U
n
,
LJ
11
LJ
n
U
I'
U
'1
u
11
U
11
u
n
U
r'
U
Hydrologic Analysis
11
I
LJ
n
Curve Numbers by
Land Use Description . Hydrologic Soil Group
A B C D
MountaIn brush - oak brush, aspen, maple
Good ConditIOn ground cover> 70% 40 40 41 48
Fair ConditIOn ground cover 30% to 70% 40 48 57 63
Poor Condmon ground cover < 30% 46 66 74 79
Woods or forest land.
Good conditIOn. Natural conditIOns 40 55 70 77
FaIr condmon. Some forest lItter 40 60 73 79
Poor condItIOn. No small trees or brush 45 66 77 83
Woods/Grass combInatIOn (orchard or tree farm)
Good conditIOn. ground cover> 75% 40 58 72 79
Fair conditIOn. ground cover 50% to 75% 43 65 76 82
Poor conditIOn. ground cover < 50% 57 73 82 86
Brush with weeds and grass
Good conditIon. ground cover> 75% 40 48 65 73
Fair conditIon. ground cover 50% to 75% 40 56 70 77
Poor conditIon. ground cover < 50% 48 67 77 83
Meadow - contInUOUS grass 40 58 71 78
ResidentIal dlstncts
1;4 acre lots 61 @ 83 87
113 acre lots 57 72 81 86
IIz acre lots 54 70 80 85
1 acre lots 51 68 79 84
Pasture or range
Good conditIOn. lIghtly grazed 40 61 74 80
FaIr condmon. not heavily grazed 49 69 79 84
Poor conditIon heavIly grazed wino mulch 68 79 86 89
Newly graded areas (no vegetatIOn establIshed) 77 86 91 94
Open spaces, lawns, parks, golf courses, cemetenes
Good condmon. grass cover> 75% 40 61 74 80
FaIr conditIOn. grass cover 50% to 75% 49 69 79 84
Poor conditIOn grass cover < 50% 68 79 86 89
Gravel roads and parkIng lots 88 92 95 98
Dirt roads and parkIng lots 86 ~ 94 98
ImperviOus surfaces pavement and roofs 98 98 98 98
Open water bodies lakes, wetlands, and ponds 100 100 100 100
n
u
n
U
11
LJ
n
U
II
u
II
u
II
L.J
n
u
II
u
n
u
n
U
/l
L.J
L.J
n
i
LJ
For a more detaIled descnptlOn of agnculturalland use and and regIOn curve
numbers refer to SoIl ConservatIOn Service Techmcal Release 55 Chapter 2,
June 1986
/l
U
Runoff Curve Numbers
Figure 3-3.2
II
~
Highway Runoff Manual
February 1995
Page 3-7
n
U
r<
n
SluLLINGs ~ CONNOLLy INC.
CONsuLTiNG ENGiNEERS
P N ' '1\ I "",., ;:;:.- r) ,1'1
roJect ame. f f! ))1 )\..'- r--C
Project No c)OUUV
Date L.I , I II DO
'" ,-
j-'Ch i
LJ
u
po Box 5080
LAcEY, WA 98509.5080
,60/491., ,99
FAX ~60/491.~857
/7 1/)"/\
By' 0~ f I
rtJ -
Page_of_
Sheet: r(r:"i ""~ /':'-" \I..~
\
No Pll-\ S As I i'\
~
...;.
r'
LJ
:r-
n
I
U
iQ:t11\IY\('VI A~.tA B
C1
I,
['>C
Ci
n
LJ
1 P') p<2r V 11)'.\.5 hi;;/';
-
:o.t.
,-
"--
n
U
'PAVED I~W~
fj2..ClIIT.f\6-E KD
( 3,VJ' '" 280' \
(\~~ ~.)I
- 10) OeOsr - o --;;-=' A'-
, .::........,)
- 5) ILO 9r ;- O. \2..
- . ..AC
- , ) 80J 5t" ;:: O.o'-f A'-
11
I
LJ
\)f!.\Vc 1,Jt'\",!,S
(; r:~ ~ I c/ ~ 301
. (.,)
~
I)SOOSf :::.
) D} 200-;,"; -=. o.? 3 A<-
TdT-At.. -- 0, (051'1'--
0, D3A<..
11
-5) DE frJrlf..X.-:;,
~COf P(~5
S,J, ')( 3.(j) L
2-
<b~ \) 7CC):,~
-=
u
11
LJ
p:::> I V IOJ5 Pi 1 cPo;
11
1 ~ 3
~O ZoO 5F -
..--} I'
') 1\ 2.0 i'Tc n-;)~
'DI'Z.oO?~ C "t40J5tS) - \) &:OSF (i:w~ \-
111 ~D:s~ C K~~ - IJ 9JO
~ 3"1) 5w - O,7~~
LJ
I'
I
LJ
11
I
Tk~ATmtNT -A~fA C
LJ
11
)6Y)ptiZ~ IOJ.S ARfP\
H.ww R- P~I1\J ( 3fL/ 'I 3Sc)' )
DK:1J (. .3 'f.. \D'x 30' )
-'5 ! DC~AU, ('5;.. no' )
j) r" .J~.<>.<:: ("? J lCO;!.~'-)
I\O<--~ fil<.1..'1-' \... ~-'{ I ~\
'"
~ \L.)&x:O'SF
Dt CO ")F
2~c)s'\-
5; i 0.)5\=
- 0.29 h-'-
:: 0, 0 2.. rk.
:::- G. 02 f7<=-
-:: 0, I z. Ac.
11
I
l.J
r
LJ
-;::.
LJ
11)\ rlL
r\ ,1-
- v' 1 ~ A<.,..,
!I
Puv ledS Arer-,-
n
u
.2
r'7_ .............. -J 7
::;.-) 1~~'3F - '"J 100 _;",..r::
-/2, GO<) <;'F CfW.tJbJ
(riMes) - '-1 00-jr (.L)~) -
= J ~ 3505F ;::::
~S-05r (SOlNk:.)
u
-=< ."\
D, .....0::1'"-
n
U
I _
~+ s-.:: I).," 1 f f-. (...~ ~l-l
. W
,,;: ,,- I 0....';"'.\
~ " 'f I' r'
",{.r~ )- -;"".~
-: --'[ ee.-r ~
- ~ -, I!G A-JE h,,~Erl
l:"'/IVC)FF ...-) :IfJDl.J1j)uo...R ))rj /J......II::
n
,
LJ
1 d -- i !,.~ j' j. ~(' ,'...1./ ~ 1:1 .""'~
I
c
c
c
SkilliNGS ~ CONNOlly INC.
CONsulTiNG ENGiNEERS
}) ~ ,) i:::
PrOject Name , .) yf1)- ~
Project No 0000 (p
Date. L-) / /I J CD
I~D PLAT
POBox 5080
LACEY, WA 98509 50110
760/491-n99
FAX 760/491-7857
By' B 1< fll
Sheet:
\)r~\'Y',c...... ,t;)
,
(~\e... 5
Page -3- of _ ~
~
N O.2.-T-n !;~5 f N, L ()t~)
-'
c
J() I P.::J:)!0-t.-? 11 (21)-
I
12-
/-;
~
r:::.:.
fI
i
LJ
T/< EATry! ~lrr Hf2. 7:.14 D
~
R"'JED ;<dl)./V
(J
l50 ~-J )( zEXY )
)0) OeO:;~
I 7CO-f
) - :)
~
;.. 0, '7' <, A/
:-' --....J ,,",-,,,,
n
G
r:;r~\Jf\,-J~ (~"" / C/ "'i- 30')
:5, pE \fJ'y\\~ C 5 IvJ )( 24() I) -
Kv..--+ f1rt'i$ C 5 * J J 7COs ~ )
I '"" - t:
)LCQS
6) .9:JV.:5F
= O.Q3A'-
--- 0, 03;A,C
fI
U
- 0 I ~D AL
r'
~
n
V.er/l QuS AreA
IOT~ !MP ~ Q L/Cf fie..
LJ
4o)"2;wsr:--' - 5)SCOsr C~~<.l~)- 1\"200~~ (SO,.Jk)
1)2CU(D~ - l~ Q'W-SF ,~~u~
fI
1
U
r
LJ
- 27) <6Z0sF
o~ ~ ~ PiC
I'
~
~l.)kIH
fj~ .5 ! )'\ IV! A L A I( t: A
n
LJ
C
Lv'.-! per 'J l.:;;u <',
-r nc- A- "D
( \' <-, , I, D
-rDF"-'- I'
( x.- ff ! I L
!-~CAlID
o. Co5 He...
Q.lfSAL
o I L-/1 fU:,
I ' YJ Ae.
n
i
LJ
:2..-
L_~t ,) _"'t.{:J
f1
U
"'-T~ I. ;:: /.,..,.... j.:..,
i(.. '-' r \ '.-J
f1.CAi, <--
-~. --;') 11",
<J I 1,"- TJ'"-
r-- _;:;;
v' :';0 /oJ'-
~) I (J Y .u "-
I
/~ 7'1 A-l..
n
U
~f;:Ei~i
/'
'7
-
'1
I
U
Iv~/+L
, )l) c-41.
r 1....,.--'\
::::-
- ,.~ I
/ c- '-'I ~ /1 I. <'-',
' -' i ' ,
- ~ :?? f't /
-- I ....)....j r; '--'
r'
LJ
I 6V \1f\f'Ij) /\01;:: ASIA 1< E""'1'tt.i'i
c
I'
~
I'
lJ
II
u
il
LJ
n
LJ
n
U
11
u
I'
~
11
lJ
11
L.J
II
u
II
u
n
u
II
LJ
n
I
LJ
n
LJ
I'
I
LJ
n
LJ
Project Name Jvli CJ)L~Q D
Project No CCOO v
Date 1.-/ )11/00
P, AT
SkiLLINGS ~ CONNOLLy INC.
CONsuLTiNG ENGiNEERS
By' EI<-M
PO Box 5030
LAny. W, 93509 50110
~60/491-n99
FAX ~60/491-~B57
Page 1-0- of -
Sheet:
DrAI V1u.f-l1'" ('<><.\( <.,
J
j
,
.~
)\iJNTrl j;~SI/'--\ T(Q.[,4T 13
r:.
r
~
4/11/00
Skillings Connolly, Inc
Middle Road Plat
11 54 35 am
page
2
c
"'"
'-
00006
~~==========~~~~~~~=~J~~Q==~i~~d~================================
DETAIL BASIN SUMMARY
BASIN ID' NorthB NAME. North Basin Treat Area B
SBUH METHODOLOGY
TOTAL AREA. 1 37 Acres BASEFLOWS. 0 00 cfs
RAINFALL TYPE. THUR6MO PERV IMP
PRECIPITATION. 1 79 inches AREA . . 0.72 Acres 0 65 Acres
TIME INTERVAL. 10 00 min CN. . . . 75.00 98.00
TC... . 14 38 min 2 42 min
ABSTRACTION COEFF 0 20
impTcReach - Sheet L. 100 00 ns 0.0110 p2yr: 2.80 s:0.0100
impTcReach - Shallow L. 75.00 ks 27 00 s:0.0100
impTcReach - Channel L 25.00 kc 17.00 s:O 0100
PEAK RATE 0 70 cfs VOL. 0 11 Ac-ft TIME' 1470 mln
l/5E v't.&Em,.-\\J(' STi'<SP
_ ,( =- 0 0".(
~ U
"
_________ \ I
----
3
-----
-----
zd
p~o FILE
L !'rrs)
UE.e.i r;y
V L \, 5 ++ ) se C
O.IQcF5
O .'"' LJ I- ..,-
I U I' I
0,02
?
~
I ~ I
0;: ':::::'0
Q;::
\/ :::-
s=
r :=
CrLo~s S~C.T;01'-Ifl.i'r{<..~"'1
Pr~
1'\ _
n~
b<o T ;Z '0 2-
2C) CO. O'-i) t
3: (0.0 i.{)2.: O. '6'o~
;;:-
1: -=-
V
,.~ I
Y!;:.l
/ f 1
I
0, %7 ~i s <:!. S 41s
~
", OkAY
==-
("1 I 0 ~ j;: ~I . ~
'-' I I c.:. S /\ i-. _ .-- I J.. ....
C./I 'SO) T I
f1
lJ
/I
~
/I
U
11
U
11
u
/I
,
LJ
II
LJ
11
LJ
f1
I
I
LJ
I'
LJ
I'
~
I'
,
LJ
II
LJ
I'
U
/I
I
LJ
11
LJ
11
LJ
n
U
11
,
u
PrOject Name. (Y\ I DOle f<- G
Project No VC::OrJ Co
Date .:..J i ! 1 i (.,\J By- B I( rfl
Sheet: Orc\ll/'I"tj-e (C\j C5
Page -JL of -
'9
"
~'\:;
SkilliNGS ~ CONNOlly INC
CONsulTiNG ENGiNEERS
PO Box 5080
LACEY. W. 98509-5080
}60/491-n99
F<\X }60/49 I )857
IK~A!mEIVT
~un.,rcf) 8
, ( ,
i <.. z.. ., C /j-' ,) 1\,
+ ) '~'1 (.
:s
r" \,..-,.... ....J(
'-' I '-.......1 '
+.2)r
___.....Ut)\!I\
/ '~~ r-~ ;-1 ~ I~ ....
"[ 'r""'cr \
(,. j
Co
f-,
e:::
D
~
Trl)
30w ~
,
ICUL
~
0,33/
.::..
CfCfO CF_r
\
-.....:
090_. 2-f/
vl70c~s
J /i J~
See.. - 2~ I .; ~\IH
231 S Mlt--\ > 20/"'\:r-i
., r< eff i1t(~'\ )1 }V1t ol::.'t/,
Check. Flow QA.--\-~ IS L~'5~ l~\Yl 5\Af3:lli~ '-/0<.-.1 r-2W'-{~
4/11/00
Skillings Connolly, Inc
Middle Road Plat
page
1
4 44:4 pm
00006
~~===========JQ9=~d~=~=~~b~r========================================
BASIN SUMMARY
BASIN ID 100yrB NAME: 100 yr storm even North B
SBUH METHODOLOGY
TOTAL AREA. . 1 37 Acres BASEFLOWS 0 00 cfs
RAINFALL TYPE. . THURI00Y PERV IMP
PRECIPITATION. 6 15 inches AREA. 0 72 Acres 0.65 Acres
TIME INTERVAL. . 10 00 min CN 75 00 98 00
TC. 14 38 mln 5 00 min
ABSTRACTION COEFF. 0.20
impTcReach - Sheet L. 50 00 ns 0.0110 p2yr
PEAK RATE 1.93 cfs VOL 0 52 Ac-ft TIME
2 80 s'O 0100
480 min
Q'fiJ 'ff.. (Y'o.'l = J, 13 C.rs .0<::( L-\Jo1Dl (" ,:HI_!c5
, ;','1 'I 1~' '. -'3 :0 50'
\/ ::: ..../' l:= ~ ~'j \ ~ .
....- - ,/) I""'" I - -; -, I
~ - t-/' ~1 L b - ~u
~~3
~ 30 + /' ! .).JiS~)3
I ..-.- 'f. -' -/11- - - - J
:: etJ I! - - 0, ::.'::'
I
r\C"/ '/1:>
rT)'JGlI',e
T=: L,J ? \l~
'l~ I _I-
I I ....... ('
}J )UI - :I(e..
I
.? ,I ,f) ......., -, ! \, :) .,......J
:--- '-~ --'l.-! ' I
11
I
U
SkilliNGs; CONNOLLy DNe
CONsulriNG ENGiNHRS
PrOject Name n, ID DL E t2.. P P LA l'
., \/ '0
Project No /..-/Cv (0
Date 41 \ II 0 i.) By' !3,t M
Sheet: Dir.:;\\0')(oc:. (?lies Page /7- of_
J
Jl
PO Box 5080
LACEY, WA 98509-5080
,60/491-}}99
FAX ,60/491 '857
,
LJ
11
u
Cj..!e "A"\",,,t;z.
!' ,)-1' - I. ....L.J ._..J
.J1";.;-t;, - "'-1 <-'[ r
SlAfjjL/-;Y
,
F/ Ol.-J ('~I..Te...
s
,
~
11
y~ l-)O.5 - 30 )l<>
Q.0'631
c,
o
i
D::.
u
n
LJ
/"', ,i
(~.) Ie"v i reI (
,
,i A, ,
~l..-(fyrC\.._\...l( ~
'! '
I :.r _\ ,
~(..Av' _1__'
c
~
I'
LJ
b~ 30'
j ~ co. eX:; -1- \ 1 Cfre<=f:J ~~ww( \ - / I rJrs3/
'--
n
LJ
R~
30 ( \, cY~ 3) + 3 C I . U~ 3) ~
30 1- 2 (/,OW) ~ QZ-tI)oS""
Q,cra
I'
I
LJ
11
""
I) I i 1
j"'< eC':"'ic..-<..\o..\e
Q
Q;::
} I Lf 8Co
VI
1+ R (),~(,l SO, 5"
,
LJ
c
n
luhere..
~
II~ 0.01
A-::: [b't i "l()2.) =-
K= Q,C78'
~ :: Q 02-
.,
30(JJo~~)+ ~ll,003)- ~ 30,01
n
L
n
LJ
,--.
~ -
" LIese...
~
0.\0/
I ) i ) O. ~ll I -
l30.01 l O. '18 . LI).u2) 0.:; -
IO(n I ~ 7
CES
(I
LJ
n
1010 G 1c.."fS > l, Cf3 c~s
I
. I
"DA~ \ <) 'Si 1'l8lE
)
o tAU
l..J
n
u
n
I
U
n
tJ
n
I ,
U
11
L
C
r'
~
11
G
11
lJ
!
u
n
u
11
LJ
n
LJ
r'
~
c
r'
LJ
r'
,
LJ
I'
11
n
LJ
f!
, ,
u
o
11
LJ
f,
U
m _I": I( v? ~"Dln-#-
PrOject Name: \ 17.ct -f l(.4t:J..v I I",--:+-
Project No OO~
Date L/ ) / I Jo<.J BY' F)f<-i/v\
Sheet: rJr.j\iV'.qCt~ C,^(c.s PageL3--of_
J
SkiLLINGS v CONNolly INC.
CONsulTiNG ENGiNHRS
PO Box 50110
LACEY, W.91l509-5050
,60/491 ,,99
FAX ,60/49 J -,557
!12f::4T Pj2J2i-1 D
4/12/00
Skillings Connolly, Inc
4 46 24 pm
page
1
:====================================================================
BAS IN SUMMARY
BASIN ID. NorthD
SBUH METHODOLOGY
TOTAL AREA. ..
RAINFALL TYPE.
PRECIPITATION. .
TIME INTERVAL.
NAME Treatment Area D
BASEFLOWS
0.00 cfs
PERV
0.64 Acres
75.00
13 50 mln
IMP
o 49 Acres
98.00
6.00 min
1.13 Acres
THUR6MO
1 79 inches
10 00 min
AREA
CN
TC
ABSTRACTION COEFF 0 20
PEAK RATE: 0 27 cfs VOL
0.08 Ac-ft TIME:
450 min
( H E T!cG7Tin tAfT PJ/2 fA- YJ hel ~ Cl.
ihttV\ Ir~tA-iv\o'~i\\ AiL-fA \2J. IJ'\~,
Jh e SAMt )0~1( cb-t, Dv p'f ~ V \0&.)
D) ~!H~( 512e.l~ ffcl~t-tf}...te
0.21 C'fS < J, ~3 CfOS C l'R-tl\\ M-S"r B) '. Dtf!.Y
L-owef peC\.I( Q
~~~+<:r ) ') s /2C.D
CC~\(S -{.r;)YV'\ TrecdyY'c.v\,\
A reG(
TREffTIYJE7'\T IJREA c
- 'f-)OJ{ft-!
4/17/00
10.31:29 am
Skillings Connolly, Inc
Middle Road Plat
page
1
00006
BKM
=============:=====================================~===;=============
BASIN SUMMARY
BASIN ID NorthC
SBUH METHODOLOGY
TOTAL AREA
RAINFALL TYPE.
PRECIPITATION
TIME INTERVAL.
NAME Treatment Area C 6 Month
0.83 Acres BASEFLOWS 0.00 cfs
THUR6MO PERV
1 79 inches AREA . 0.38 Acres
10 00 min CN 75 00
TC 14 35 mln
IMP
o 45 Acres
98 00
6 00 min
ABSTRACTION ~ 0.20
PEAK RATE. ~cfs VOL.
0.07 Ac-ft TIME
450 min
11
L
SkiLLINGS ~ CONNoLLy BNC
CONsulTiNG ENGiNEERS
~
Project Name r)'lIDDU;
Project No ~<.o
Date. 1-;' J n ) oc)
[KG -PlAl
11
PO Box 5030
LAUY, WA 91\509.5030
l60f49! n99
F<\X ,60f491.,357
By' tot rr\
LJ
Sheet:
'f-: n~\ i Y\~\ J:.A
U
(' ,;;I\LS
Page J!:L of _
,--,
T\zerfTft')EJ'fT A-I2.EA C (C::J1'\T)
~I - ~~
US~ Sv.\PLE '6 W1Dt. I/'''''! J, r swp5: AND l26UC Wc:JLV
'$
"-
:.'"
LJ
11
L.J
LJ
I J ~
~/ ~I ,
, .
~.,' /;0 :, 0,"', ,
, ~ ., ~....
~' hJIDe.
r
,-
0..-
, ,
c-:.
[1
%
:0
V
o -K,)C.~ <,va.V f}s
I'
P~q("('l C:.(
I
c
~
fl
:S
"
L.J
II
PROfJLt
NT. <
LJ
J1
V.f:~ I fl.f V ~ J.; fT/;ec
LJ
n
Q (~m.)
Ys :
2.. -;:;.
~ (;) I 2 S c FS
O,eH'
0,02.
..3
6 =- Sf
u
11
LJ
11
LJ
C r()~-; Se 01:,......-{ I+- teG\
n
ff~
J) ~
D';) t 2-)7-
B{tJ.ot) T 3 (D.()'-!Y~-= O. 32'18 ~t~
().?5C.fS /
/ 0 I 32tfe .1-7 2. ~ Q 77- +-f/s~,-
LJ
11
LJ
V =: ~A
,--,
LJ
11
I
LJ
n
u
n
LJ
n
LJ
--? (yCi ! -~ / ~ _ -
'" n ., 'D ' / J .. ~-"
J. ',- _ ...J "--~ --'
I
I .170 ! I
J i () J! 'S-c
:- ?J i~(j
- .t..-I \V
~!r--t
!
...
,-(
--
T' I
'--, ....,
/ /,-).
/ _~i"1A'~':.
} ~'~..
....
, ,
n 1<' :A, I
'-" "v'7
n
U
(I
L
11
~
/l
I
LJ
11
u
r'
,
u
n
U
(l
LJ
/l
I
LJ
11
L
/l
L
/l
I
,
L.J
/l
,
LJ
c
n
I
U
n
L.J
n
u
n
,
LJ
fl
LJ
n
LJ
PrOject Name. Y))rmLE (1..()Ar)
Project No DCD00
Date 1//7/W
Sheet: 0rc.( I {'Ct.... (. C:;d c.s
'"
Pu:rr
SkilliNGS ~ CONNOlly INC.
CONsuLTiNG ENGiNEERS
POBox 5080
LAcey. W.98509-5080
)60/491 -) )99
FAX )60/491 )857
BY' B I( iYl
-
Page -/.:.2- of _
Tj2LAilv1EI'J! tiR.E/t C
4/17/00
Skillings Connolly, Ine
Middle Road Plat
10:53 56 am
page
1
00006
~~========Le~=~~=?J~j~C1=fj=~~~1:==================================
BASIN SUMMARY
BASIN ID Northe
SBUH METHODOLOGY
TOTAL AREA. .
RAINFALL TYPE.
PRECIPITATION. .
TIME INTERVAL
NAME: North Basin Treat Area C
0 83 Acres BASEFLOWS. 0 00 ef8
THUR6MO PERV
1. 79 inches AREA . 0.38 Acres
10.00 min CN . . . 75 00
TC. 14.38 min
IMP
0.45 Acres
98.00
2.42 min
ABSTRACTION COEFF 0.20
impTcReaeh - Sheet L. 100.00 ns 0 0110 p2yr 2.80 s 0 0100
impTcReach - Shallow L 75 00 ks:27 00 8.0.0100
impTcReach - Channel L. 25.00 kc 17 00 8 0.0100
PEAK RATE Q 48 cfi) VOL: 0 08 Ac-ft TIME. 1470 min
CtlECt:.. FLOv0 .2AiE' LEsS it1p;\( ~TAJ3JLi7'j FWt-v /ZATE
Q,~'1f == U. c.J6cf'.5
1/ := O. c)J33' C I"~ )
:5::C (). 02.
2:.=3
T == g, L/9a I
b:;' 9'
)=
'8 -t Z[u, 083)3
- ~, LfCf0
4 '5:;',-}-...11 b
w/ :5 u-r~(E
d~p+h ().1 ) /1 = ]/' = 0, "$6'
,-,'
'-'
{~CUT
L.:e f,1f
v=:
( ~, '-196 -'t;)/ /.t;
(;, 08-3'
( J.\ c- u io~ I.) r\~ \ \.. U I
- - -'-- I . (1),-", r;l.. '.U ~ ;\C(l v:.-
I
D~ ~'
j -=- o. CB3 1- } I C~(~(Q ~<;.. c;\)
) y G~ ::
k>
"8 ( J · O~ 3) -1 3' ( ) I 083) <-
<;<. t.> -( 2 (1/003\\"* ('22....J.- I ') os
'-' 1 L J j.j
r)C52
L-/l t,.../.
11
~
n
u
!'
LJ
11
G
r
LJ
n
u
n
l..J
n
u
n
u
n
Lt
rr
I
LJ
n
LJ
rr
U
n
u
n
u
n
u
r
l.J
n
u
n
,
LJ
SkilliNGS" CONNOlly INC.
CONsulTiNG ENGiNEERS
Project Name yilJCDLE iQr)r:t) p._.;....,
Project No D0Qr..)(j)
Date L))n i 00 By' hKl' f\
Sheet: I) ,51 l,y: C e Cc\. k <-, Page ~ of _
J
PO 8m 5080
LAuv, WA 98509 5080
;60/491.; ;99
FAX i60/491 i857
I g E rlT j',) t: rTT A r? tIL) c.. C ~C) 6~ )
<
~
,
~
f\ \ \ \ Q
~c CCt,U~\C':i~
C:.
f-.
~
) IIC' Ii 1<, c/. Gl':;l 50. s-
Q::: I I~(P
-
V\
c
~
"
,) .
!."J,-, 1"';;_ i e
n -= G. 01
A~ (b~-t2:~'l-) -
R ~ O. 92-
.....--
"==> :=: Q. 02
\ ~
8(),c)S3)t 3(/, c.J(S?J....~ /7,18
Q - } ) Lj %c,
0.07
II ) ! \ 0 .{..,<" J ( \ C1 s
\J2,)t8 ~J19zJ ().C)2..}..:::: 32~03~'f-.S
) I,...,
3l..J! 03 (f~ cJ, "j ~
"
CFSo
Fh
i 5 "S-rA!::lc
Olc'(j
+ .
c
SkiLLINGS - CONNOlly INC.
CONsuLTiNG ENGiNEEnS
Project Name. rf)j\OOU:; r2.D
Project No CD00C,
Date '-1)17/00
Sheet: DrC^\V'Ze, e ('o--.\c':
.J
f) LNT
!'
i
U
PO Box 7080
LACEY, W" 98509-7080
,/'0/491-)3 99
FAX ,60/491-,857
BY' B )( rn
Pagenof_
I'
L.J
NOR-Iii r~J1S)N f?e/fjfj\QM C+]Lc..S
!'
L.J
:l.1I f ) 1..:'Tn-81 ) o/'\ :5T .e~\ Cl L. \ iL [
II
LJ
A
FLJiJ
n
U
...,llo.
~
~LJW
2..33 M\" COlJtcr
/0'
r;)
n
U
n
A _
(ju5HE]) C I~CA!,\ ?-jotNC
VOlfYS CO. <..Joj
12'\ Pif<-
Pe.r-GfcJ.ed Drc\}Y) ~;p~
-'j ~\
_ 'I i..I I
, i J
u
11
~
--
~A-)~
Pr o+J-t..
NlS
11
I
U
r'
I
11
n
L.J
1- 4~ -I
-j;: 3D 10/M' wi
:::: <:
I ..l
oS 2
~~ =
)5 1 "l/HfL
- / Z:r rl;':.n
~ J '-:) '-7 rJI"-
n
L.J
n
,
LJ
H =5'
L~ 20'
Ps ;: ZeY'x '-f - SOl
II
u
n
Q ~ -C~e~
~ ~\ -t L As
~
-= ), 2 S; ~
n
LJ
"5:::: ~ ~ "::J.. h r VU'Cl (c;..+, 0
(r -(')
'j"-\ ( <" L "f'''''''-Y
h ~ 20 Q
--r- <6 -'
2-rJ
"60' ~ h ~ 0, L{ ~ 32.:.. H
u
L
r
LJ
n
i I
LJ
('
G
SkilliNGS' CONNolly INC.
CONsuLTiNG ENGiNEERS
PrOject Name' (;1 !j50l (; (.:.../) PL~T
Project No DO(X)~
Date l-) ) n J OeJ By' K k~ VYJ
Sheet: Page -L-fL- of _
11
I
LJ
PO 8m 50/30
L.CE', W. 98509 5080
560/49 I 5i99
FAX 560/491 Hl57
11
L
:L\.JP-'TM (~(jS{f'" ~e.*-t""..i,,(Cf\ J:;c..s f\ CoV\T
11
()
( (' ,
C,:,)
/L
.1:.+-/ r .;-
~ ., .........
Q
- ~ '\
l ;-~ )
.-
~
LJ
~5-- ~ )
!1
LJ
!1
LJ
0 \ 0 0
1, () I ?:> 3. 1'05 ~1
70 I, (:) J 110
'-,
3.0 2 //5 ctCo
4,0 --. ?? /2u ~3(P
.;..- ,..-).J
5lU '2 & f l25 &5;
n
,
u
n
~
n
L
n
u
n
I
LJ
11
i
L.J
!1
L.J
!1
I
U
Ii
LJ
I',
U
Il
u
n
u
n
U
J
----.
u
r
,
,
u
r
u
\I
U
r
,
u
r
I
u
r
u
r
u
\I
u
"
u
n
u
\I
u
o
o
'tl
\I
o
o
~ .
,,~
u
~
'lIO
eO.
;/(/1
t\
t
"-h'K\t-\ ~\~(O\'\\)~
\. \
C;) S 1 ;--.\ LEGEM\) , I . I
BaS i. id 1I11lll_ \ 00 1 Jl. ::;nH Cl,;J ~'1~"" 'j '~f'"
\\I.jd Mo. a j), scJrv-r:f t\f'~ '5 f"'t'
o
o
(Il
tB
at
M
a1
o
o
0\
'3
(,
~
12 15
1il'le in \\ours
r
,
L.J
I'
L
Hyd No N100
Rate. 5.03 cfs Time: 8.00 hr
Vol 1 27 Ac-ft Tnt 10 00 min
Hyd No 2
Rate. 5 03 cfs Time 8 17 hr
Vol 1 27 Ac-ft Int 10 00 min
fl
I
LJ
11
G
n
U
n
LJ
n
,
LJ
11
LJ
fl
l.J
I'
LJ
/l
LJ
Il
l.J
Il
,
U
11
I
LJ
II
u
n
LJ
n
u
II
LJ
II
LJ
11
I
LJ
11
,
LJ
11
I
U
11
~
f'
LJ
11
~
11
~
11
LJ
r'
I
U
11
,
u
11
I
U
11
~
11
u
[l
,
u
n
u
11
u
11
I
LJ
n
U
n
I
U
4/17/00
2 13 30 pm
Skillings Connolly, Inc
Middle Road Plat
page
1
00006
BKM
BAS IN SUMMARY
---------------------------------------------------------------------
---------------------------------------------------------------------
BASIN ID NI00
SBUH METHODOLOGY
TOTAL AREA
RAINFALL TYPE
PRECIPITATION
TIME INTERVAL
NAME North Basin Drainage
3 33 Acres BASEFLOWS 0 00 cfs
THURI00Y PERV
6 15 inches AREA. 1 74 Acres
10 00 min CN 75 00
TC. . 6 50 min
IMP
1 59 Acres
98 00
6 00 min
ABSTRACTION COEFF 0 20
PEAK RATE. 5 03 cfs VOL
1 27 Ac-ft TIME.
480 min
II
LJ
II
LJ
r'
LJ
r'
LJ
r'
U
r'
LJ
n
u
II
LJ
n
LJ
II
u
n
LJ
II
LJ
II
LJ
11
U
II
J
LJ
n
LJ
n
u
II
LJ
n
LJ
4/17/00
00006
BKM
2:13 30 pm
Skillings Connolly, Inc
Middle Road Plat
page
2
---------------------------------------------------------------------
---------------------------------------------------------------------
STAGE STORAGE TABLE
CUSTOM STORAGE ID No. North
Description North Basin Detention
STAGE <----STORAGE---->
(ft) ---cf--- --Ac-Ft-
STAGE <----STORAGE---->
(ft) ---ci--- --Ac-Ft-
STAGE <----STORAGE---->
(it) ---cin- --Ac-Ft-
STAGE <----STORAGE---->
(it) ---ci--- --Ac-Ft-
================~=======================================================================================
o 00
o 10
o 20
o 30
o 40
o 50
o 60
o 70
o 80
o 90
1 00
1 10
1 20
o 0000 0 0000
3 2000 0 0001
6 4000 0 0001
9 6000 0 0002
12 800 0 0003
16 000 0 0004
19 200 0 0004
22 400 0 0005
25 600 0 0006
28 800 0 0007
32 000 0 0007
35 200 0 0008
38 400 0 0009
1 30
40
1 50
1 60
1 70
1 BO
1 90
2 00
2 10
2 20
2 30
2 40
2 50
41 600 0 0010
44 BOO 0 0010
4B 000 0 0011
51 200 0 0012
54 400 0 0012
57 600 0 0013
60 BOO 0 0014
64 000 0 0015
67 200 0 0015
70 400 0 0016
73 600 0 0017
76 BOO 0 0018
BO 000 0 001B
3 20
30
40
50
3 60
70
3 BO
2 60
2 70
2 80
2 90
3 00
83 200 0 0019
86 400 0 0020
89 600 0 0021
92 800 0 0021
96 000 0 0022
10 100 000 0 0023
104 00 0 0024
lOB 00 0 0025
112 00 0 0026
116 00 0 0027
120 00 0 0028
124 00 0 0028
12B 00 0 0029
4 00
4 10
4 20
4 30
4 40
4 50
4 60
4 70
4 BO
4 90
5 00
5 00
3 90
132 00 0 0030
136 00 0 0031
139 20 0 0032
142 40 0 0033
145 60 0 0033
148 80 0 0034
152 00 0 0035
155 20 0 0036
158 40 0 0036
161 60 0 0037
164 80 0 0038
16B 00 0 0039
168 00 0 0039
/1
u
4/17/00
2-13:30 pm
Skillings Connolly, Inc
Middle Road Plat
page
3
11
00006
BKM
LJ
---------------------------------------------------------------------
---------------------------------------------------------------------
,---,
STAGE DISCHARGE TABLE
I
U
[l
,
U
DISCHARGE LIST ID No
Description North Basin
North
['
l.J
STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE--->
(ft) ---cfs-- ------- (ft) ---cfs-- ------- (ft) -- -cfs-- ------- (ft) ---cfs-- -------
--------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------
0 00 0 0000 1 30 106 50 2 60 113 00 3 90 119 50
0 10 10 500 1 40 107 00 2 70 113 50 4 00 120 00
0 20 21 000 1 50 107 50 2 80 114 00 4 10 120 50
0 30 31 500 1 60 108 00 2 90 114 50 4 20 121 00
0 40 42 000 1 70 108 50 3 00 115 00 4 30 121 50
0 50 52 500 1 80 109 00 3 10 115 50 4 40 122 00
0 60 63 000 1 90 109 50 3 20 116 00 4 50 122 50
0 70 73 500 2 00 110 00 3 30 116 50 4 60 123 00
0 80 84 000 2 10 110 50 3 40 117 00 4 70 123 50
0 90 94 500 2 20 111 00 3 50 117 50 4 80 124 00
1 00 105 00 2 30 111 50 3 60 118 00 4 90 124 50
1 10 105 50 2 40 112 00 3 70 118 50 5 00 125 00
1 20 106 00 2 50 112 50 3 80 119 00 5 00 125 00
/1
u
/1
l.J
11
LJ
/1
u
,---,
u
,---,
u
/1
LJ
/1
LJ
Il
u
/1
u
/1
u
/1
u
n
u
n
U
n
I
U
4/17/00
2 17 8 pm
Skillings Connolly, Ine
Middle Road Plat
page
5
,.--.
I
LJ
00006
BKM
=====================================================================
I'
~
LEVEL POOL TABLE SUMMARY
MATCH INFLOW -STO- -D1S- <-PEAK->
OUTFLOW STORAGE
I'
LJ
<--------DESCRIPTION---------> (cfs) (cfs) --id- --id- <-STAGE> id Ccfs) VOL (cf)
-------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
North Basin 100 Year
o 00 5 03 North North
o 10 2 5 03
3 20 cf
I'
LJ
,.--.
LJ
,.--.
LJ
11
I
I
U
,.--.
~
n
I
~
11
i
LJ
11
,
lJ
,.--.
u
n
LJ
i'
~
\1
LJ
I'
LJ
n
LJ
il
,
LJ
c
[
[
C
r'
~
[
[
I'
U
f'
L
[
[
f'
L
I'
~
[
f'
~
I'
~
r'
~
I'
~ SKILLlNGS-CONNOLL Y, INC.
Consulting Engineers
r
u
APPENDIX C
Supporting Documentation
SOils Map
SOils Data
SOil Log Map
Yelm Veterinary Clinic Expansion
Storm Drainage Analysis & Report
(J
['J
'J
IJ
'J
/J
IJ
IJ
~J
IJ
]
J
]
]
]
]
ESIGNED BY:
NTERED BY'
....,HECKED BY'
PROJ. ENGR..
,---
j
..--
J
.~~2~T H~;D~ LO~~' 1
2' -7.5' MEDIUM SAND Wi 2"-6" COBBLES
.TEST HOLE No.2
0' - 2' SANDY LOAM
2'-7.5' MEDIUM SAND wi 2"-8" COBBLES
.TEST HOLE No.3
O' - 2' SANOY LOAM
2'-7.5' MEDIUM SAND wi 2"-12" COBBLES
!lQIL.
ALL TEST HOLES WERE SLIGHTLY COMPACTED FROM 3.5' TO 4' .
SUGGEST LOCATING THE BOTTOM OF ANY INFlL TRA TION BASIN AT OR
BELOW 4'
NO SIGNS OF GROUND WATER WERE OBSERVED IN THE TEST HOLES.
SEE SIGHT MAP FOR LOCATION OF TEST HOLES.
DATE
B. MATTHEWS
T SA TER
NO.1 DATE
R. CONNOLLY
.>-\
I
I Ov.:;rOooo6opl.doa X"I:Zoo0068~. Z-Z4X.168. 04/18/00 11:09 ";za
SECTION 19 TOWNSHIP 17N
-l ;~:.-3 50.00' I 52.00' I 54.00'
'::! 5 ;., ~I :Sll
14.91 il 7 8
6
;;;
EX FENCE ~
" '",
, ,
'" '",
, '
, '
" '''',
"~ ~"'~<'~ ~~~
" ~<"
, '~/
" ,
, ,
, '",
" ,
, ,
""',
, ,
, '",
" ,
, ,
, ,
REVISIONS
CONTRACT NO.
RANGE 2E W M
I
I
58-:79-:--
v'
'0-
;.,
'"
oi
'"
_,
0'
~'i
~,..
9
7445'
L=3.05'
14
'I 0"
g 90.00
1.3 g ~
TRACT B I;., 'J.. I g
! I~ 15 _ ,.;g
N", .
N;\O
1 crili
i :::, ' 90.02:
90.00" llil
..,
16 I'"
L=8.40~ _ ~
69.10'
,
"
f1\ EXISTING HOUSE TO BE
\.J REMOVED AND SEPTIC
SYSTEM TO BE ABANDONED
PER D.O.H. REOUIREMENTS
,
,
"
,
,
SkilliNGS ... CONNolly INC.
CONsulTiNq ENqiNEERS
TRANSPORTATION ENVIRONMENTAL
,.... LAOn'III.-':II. u.crr, VA .,.,
_V1.lll>ft """ _V1.Il1lU
1"""""'_ -I
YELM
SCALE IN FEET
~
VERTICAL DA ruM
NGVO 1929
SURFACE MON. AT INTERSECTION OF
FIRST ST. AND RAILWAY RD.
AT ELEVATION = 332.179
\.._ I
o 20 40 80
BASIS OF BEARING
SHORT SUBDIVISION NO.
SHS978187YL
S 89' 7'22" E
S 89'::l.4'~"IE 107.62'
,289.35'
....
~I~ I
b'~ I
, "t 64303500400 I
"ft-Y1 ~:~
L- b' 01'"
~L i z
,. :-e----.
0100
,Z
S 89'29'56" E
76.70'
J'
'-:'6'.
.j~~?S~
.~.>~"J'.. .~,
V(' .,').,<10,...,;;.
~ ",..",
OVERALL SITE BOUNDARY LINES
NOT TO SCALE
MIDDLE ROAD
PLAT
Wf..,
t
VICINITY MAP
NOT TO SCALE
APPLICANT:
'!'ELM PROPERTY DEVELOPMENT L.L.C.
21709 96th AVE W
EDMONDS. WA 98020
(425) 778-7211
DENNIS BALASCIO
SITE
ADDRESS:
16422 SE MIDDLE ST
'!'ELM, WA 98597
ENGINEER:
SKILLINGS-CONNOLLY INC.
P.O. BOX 5080
LACEY WA 98509-5080
(360) 491-3399
BRIAN MATTHEWS, P.E.
TAX PARCEL NUMBERS:
64303500504
64303500400
TOTAL SITE AREA:
UNDEVELOPED AREA:
PROPOSED PLAT AREA:
DRAINAGE AREA:
NE T AREA:
13.41 ACRES
9.26 ACRES
4.15 ACRES
0.38 ACRES
3.77 ACRES
ZONING.
PROPOSED DENSITY:
TOTAL NUMBER OF LOTS:
R-6
5.6 UNITS/ACRE
22
WATER:
SEWER:
POWER:
STORM DRAINAGE.
CITY OF '!'ELM
INDIVIDUAL STEP SYSTEM
PUGET SOUND ENERGY
INDIVIDUAL DRYWELLS AND ON-SITE
RETENTION BASINS
BUILDING SETBACKS:
FRONT. 15'
SIDE - 5' OR 10' If NEXT TO ROAD
BAa<. - 2~'
LEGAL DESCRIPTION: LOT 3 OF THURSTON COUNTY SHORT
SUBDIVISION NO. SS978187YL AS
RECORDED SEPTEMBER 16, 1997
UNDER AUOITORS FILE NO. 3109448.
ALSO. LOT A OF BLA-0309, RECORDED
OCTOBER 25, 1985 UNDER AUDITOR'S
FILE NO. 8510250041. RECORDS OF
THURSTON COUN TY WASHINGTON.
JCe NUWBER
00006
SOil lOG MAP
SHEET
1
CF
1
9iEETS
II
u
II
LJ
11
LJ
c
S/76
II
LJ
c
I'
I
LJ
I'
u
r'
U
c
I'
LJ
n
U
n
I
U
I'
LJ
I'
LJ
n
!
U
n
LJ
SCS SOIL MAP FOR THURSTON COUNTY
11
U
Skillmgs-Connolly,lnc
Consulting Engmeers
Middle Road Plat
Yelm, Washmgton
00006
,Il
u
fl
I 's'on County Washington
il_J l
n
tl rded areas ma~ e up about 10 percent of the total
~age .
permeabllltv IS moaerately rapid In the Spana soil
:.llable "ater capacity IS moderate EHectlve rooting
.1 his 20 to 40 Inches A seasonal high water table IS
,",-
]fa depth of about 12 to 36 Inches from November to
.1.r'i. RunoH IS slow and the hazard of water erosion IS
I I
$ It.
~~ost areas are used as hayland and pasture ThiS
:Ilil is sUited to hay and pasture The main limitations
i Ithe seasonal high water table and the moderate
i.Jable water capacity Proper stocking rates pasture
dation and restricted graZing dUring wet periods help
raep the pasture In good condition and protect the
@' ifrom erosion Rotation grazing helps to maintain the
~ty of forage Periodic mowing helps to maintain
~tin growth discourages selective grazing, and
1&1Jls weeds In most years Irrigation IS needed for
." ""'um production Sprinkler Irrigation IS the best
cd of applYing water The amount of water applied
. rd be sufficient to wet the root zone but small
f;Qh to minimize the leaching of plant nutrients
-w areas are used as woodland On the baSIS of a
ar site curve the estimated site Index for
s-fir is 144 On the baSIS of a 50-year site curve
,"'~O The estimated growth rate of an unmanaged
ged stand of Douglas fir IS 150 cubiC feet per
r year at 60 years of age
main jimltatlon affecting the harvesting of timber
: uddiness caused by seasonal wetness Use of
and tracked equipment when the soil IS wet
;in ruts and SOil compaction Unsurfaced roads
i~ trails are soft and can be Impassable when
gging roads reqUire SUitable surfacing material
:round use Rounded pebbles and cobbles for
nstruction are readily available on thiS unit The
al high water table limits the use of equipment to
:Ods Disturbance of the protective layer of duff
,minimized by the careful use of wheeled and
equipment
ling establishment IS the main concern In the
'on of timber Reforestation can be
Hshed by planting Douglas-fir seedlings If the
eludes seed trees natural reforestation by red
Curs periodically In cutover areas The seasonal
ter table inhibits root resOlratlon and thus results
, seedling mortality Whe~ openings are made In
~PY. Invading brushy plants can prevent the
, ment of planted Doualas-fir seedllnOs
< on fores! understory ~plants are cas~ade
rape salal Vine maole western brackenfern
.90n White oak
89
ThiS map unit IS In capability subclass II/w , / PAo~(.T
Jt... 5& jJ".
110-Spanaway gravelly sandy loam, 0 to 3 jV 1:
percent slopes ThiS very deep somewhat excessively J r
drained soil IS on terraces It formed In glaCial outwash
and volcaniC ash The native vegetation IS mainly
grasses ferns and a few conifers Elevation IS 100 to
400 feet The average annual preCipitation IS 45 to 55
Inches the average annual air temperature IS about 51
degrees F and the average frost free period IS 150 to
200 days
TYPically the surface layer IS black gravelly sandy
loam about 15 Inches thick The subsoil IS dark
yellOWish brown very gravelly loam about 5 Inches thick
The substratum to a depth of 60 Inches or more is dark
yellOWish brown extremely gravelly sand
Included in thiS unlt are small areas of Alderwood
soils on till plainS Everett Indianola and Nisqually soils
on outwash terraces and Spana sods In depressions
Also included are small areas of Spanaway sods that
have a stony sandy loam surface layer and small areas
of Spanaway gravelly sandy loam that have slopes of 3
to 15 percent Included areas make up about 20
percent of the total acreage
Permeabdlty is moderately rapid In the subsod of the
Spanaway SOil and very rapid In the substratum
Available water capacity is low Effective rooting depth
IS 60 Inches or more Runoff is slow and the hazard of
water eroSion IS slight
ThiS unit IS used mainly as hayland pasture or
cropland as a Site for homes or as a source of gravel
It IS also used as woodland
The main limitation affecting hay and pasture is the
low avadable water capacity Proper grazing practices
weed control and fertdlzer are needed to ensure
maximum quality of forage Rotation grazing helps to
maintain the quality of forage Periodic mowing helps to
maintain uniform growth discourages selective grazing
and controls weeds Animal manure can be applied
periodically dUring the growing season Areas that
receive heavy applications should be harrowed at least
once a year In summer Irrigation IS needed for
maximum production of most forage crops Sprinkler
Irrigation IS the best method of applying water The
amount of watElr applied should be sufficient to wet the
root zone but small enough to minimiZe the leaching of
plant nutrients
ThiS unit IS suited to crops Wheat oats
strawberries raspberries blackberries and sweet corn
are commonly grown The main limitation is the low
available water capacity In summer Irrigation IS
needed for maximum production of most crops
".__ '. .,:1'
fI
u
,---,
u
,---,
~
I'
U
n
~
[
11
l.J
r
LJ
n
l.;
11
~
n
l.J
I'
~
!
u
I'
U
,---,
i
LJ
,---,
I
l.J
n
I
LJ
11
u
n
,
l.J
90
Sprinklers can be used but a slow application rate IS
needed to minimize runoff The amount of water applied
should be sufficient to wet the root zone but small
enough to minimiZe the leaching of plant nutrients The
application rate should be adjusted to the available
water capacity the water Intake rate and the needs of
the crop Animal manure can be applied periodically
dUring the growing season Areas that receive heavy
applications should be harrowed at least once a year
This unit IS well sUited to homesltes Pebbles and
cobbles should be removed particularly In areas used
for lawns In summer Irrigation IS needed for lawn
grasses shrubs vines shade trees and ornamental
trees Mulch fertilizer and Irrigation are needed to
establish lawn grasses and other small-seeded plants
The main limitation affecting septic tank absorption
fields IS a poor filtering capacity If the denSity of
housing IS moderate or high community sewage
systems are needed to prevent the contaminatIon of
water supplies caused by seepage from onSlte sewage
disposal systems Cutbanks are not stable and are
subject to sloughing
Douglas-fir IS the main woodland species on thiS unit
Among the trees of limited extent are Oregon white oak
lodgepole pine and red alder Douglas-fir and Scotch
pine are grown on Christmas tree plantations On the
basIs of a 100-year site curve the mean site Index for
Douglas-fir IS 140 On the baSIS of a 50-year site curve
It IS 108 The highest average growth rate of an
unmanaged even-aged stand of Douglas-fir IS 145
cubic feet per acre per year at 65 years of age
ThiS soil IS sUited to year round logging Unsurfaced
roads and skid trails are slippery when wet Logging
roads require suitable surfacing material for year-round
use Rounded pebbles and cobbles for road
construction are readily available on this unit
Disturbance of the protective layer of duff can be
minimized by the careful use of wheeled and tracked
eqUipment
Seedling establishment and seedling mortality are the
main concerns In the production of timber Reforestation
can be accomplished by planting Douglas-fir seedllnqs
If the stand Includes seed trees natural reforestatlon- by
Douglas fir Oregon white oak and lodgepole pine
occurs periodically In cutover areas Droughtiness In the
surface laver reduces the seedling surVival rate When
openings are made In the canopy invading brushy
.olants can delay the establishment of planted Douglas
fir seedlings
Common forest understory plants are cascade
Oregon-grape salal western brackenfern western
swordfern Indian plum and Scotch-broom
Soil Survey
ThiS map unit IS in capability subclass IVs
111-Spanaway gravelly sandy loam 3 to 15
percent slopes ThiS very deep somewhat exceSSively
drained soil is on terraces It formed In glacial outwash
and volcanic ash The native vegetation IS mainly
grasses ferns and a few conifers Elevation IS 100 to
400 feet The average annual precipitation IS 45 to 55
Inches the average annual air temperature IS about 5"1
degrees F and the average frost free period IS 150 to
200 days
TYPically the surface layer IS black gravelly sandy
loam about 15 Inches thick The subsoil is dark
yellowish brown very gravelly sandy loam about 5
Inches thick The substratum to a depth of 60 Inches or
more IS dark yellowish brown extremely gravelly sand
Included In thiS unit are small areas of Alderwood
sOils on till plains and Everett Indianola and Nisqually
soris on terraces Also included are small areas of
Spanaway soils that have a stony sandy loam surface
layer and small areas of Spanaway gravelly sandy loam
that have slopes of 0 to 3 percent Included areas makE
up about 20 percent of the total acreage
Permeability is moderately rapid In the subsoil of the
Spanaway soil and very rapid in the substratum
Available water capacity IS low Effective rooting depth
IS 60 Inches or more Runoff is slow and the hazard of
water erosion is slight
This unit is used mainly as hayland or pasture as a
site for homes or as a source of gravel It is also used
as woodland
The main limitation affecting hay and pasture is the
low available water capacity during the growing season
Proper grazing practices weed control and fertilizer are
needed to ensure maximum quality of forage Rotation
grazing helps to maintain the quality of forage Periodic
mowing helps to maintain uniform growth, discourages
selective grazing and controls weeds Animal manure
can be applied periodically during the growing season.
Areas that receive heavy applications should be
harrowed at least once a year In summer irrigation is
needed for maximum production of most forage crops.
Sprinkler Irrigation IS the best method of applYing water
The amount of water applied should be suffiCient to we!
the root zone but small enough to minimiZe the leachirlf
of .olant nutrients
ThiS unit IS SUited to homesltes The main limitation
IS the slope Cutbanks are not stable and are subject tc
sloughing A plant cover can be established and ,,~
maintained through proper fertiliZing seeding mulcnl ~
and shaping of the slopes Pebbles and cobbles shoU
be removed particularly In areas used for lawns In
,;,'
~;
.1,-.
/')
I f
U Hydrologic Analysis
[I
LJ Soil Name Class Soil Name Class Soil Name Class
Aabab B Bograp B Clayton B
n Adkins B Boistfort C Cle Elum B
U Aeneas B Bong B Cleman B
Agnew C Bonner B Clint B
f' Ahl B Bossburg D Cloquato B
Ahren B Bow C Cocolalla C
U Ahtanum C Brew C Colockum B
Aita C Brickel C Colter B
n Ats B Bridgeson C Colviile D
I Alderwood C Brief B Conconully B
LJ
Almota C Briscot C Copalis B
11 Alpowa B Broadax C Cordy B
Alvor C Bromo B Cotteral B
LJ Ampad C Buckhorn B Covello B
Anatone 0 Buckley C Cowinch B
n Anders C Buhrig C Cusick D
U Ansaldo B Bunker B Custer C
Antilon B Burbank A Dabob C
r' Ardenvoir B Burch B Dalkena B
Arents B Burke C Darland B
U Arta C Cagey C Dart A
Ashoe B Calawah B Dearyton B
11 Asotin C Calc use B Dehart B
LJ Babcock C Carlsborg A Delphi D
Badge B Carmack B Dick A
Bagdad B Carstai rs A Dimal D
!' Baldhill B Casey C Dinkelman B
,
U Bamber C Cashmere B Dinkels B
Barneston A Casmont B Disautel B
11 Baumgard B Cassolary B Dobbs B
~ Bear Prairie B Cathcart C Dome B
Beausite B Cathlamet B Donavan B
Beckley B Catla D Doty B
n Belfast B Cattcreek B Dougan B
,
LJ Beljica B Cedonia B Dougville B
Bellicum B Centralia B Dragoon B
n Bellingham C Chamokane B Dungeness B
U Belzar C Chard B Dupont D
Benco B Chehalis B Earlmont C
Benge B Chelan B Edgewick C
n Benham B Chesaw A Ekrue C
LJ Bernhill B Chewawa B Eld B
Bestrom B Cheney B Ellisforde C
f' Beverly B Chesaw A Elochoman B
LJ Bickleton B Chewelah B Eloika B
Bisbee A Chiwawa B Elweil C
Bjork C Cine bar B Elwha C
11 Boistfort B Cispus A Emdent C
LJ Booker D Clailam C Endicott C
Boesel B Clato B Entiat D
n
I Hydrologic Soil Groups
U
Figure 3-3.3
f'
U Page 3-8 Highway Runoff Manual
February 1995
n
~
h
(
U Hydrologic Analysis
11
LJ Soil Name Class Soil Name Class Soil Name Class
Ephrata B Hoypus A Ledow A
11 Esquatzel B Huckleberry C Lickskiilet 0
LJ Everett A Huel A Linvelle B
Everson C Hum B Littlejohn B
Ewall A Humptulips B Logy B
11 Farrell B Hunters B Loneridge C
LJ Finely B Hyas B Louella B
Foss B IIwaco B Lummi 0
11 Galvin C Indianola A Lynnwood A
Garfield C Inkier B Lyre A
U Garrison B Jimcom C Lystair B
Germany B Jonas B Lytell B
11 Getchell C Jumpe B Mabton B
u Giles B Juno A Magallon B
Glenoma B Kalaloch B Makah B
Il Godfrey 0 Kapowsin C Maki C
LJ Gorskel C Karamin B Mal B
Gorst 0 Kartar B Malaga B
Govan C Kartar B Manley B
r' Green Bluff B Katula B Marble A
,
LJ Greenwater A Kegel C Margerum B
Grehalem B Kennewick B Marlin 0
11 Grisdale B Kiehl A Martella B
Grove A Kilchis C Mashel B
u Gwin 0 Kiona B May town C
Hagen B Kitsap C McDaniel B
I' Hakker C Kittitas 0 McElroy B
I Halbert 0 Klaber 0 McKenna C
LJ
Hale B Klaus B McMurray 0
11 Haley B Klicker B Melbourne B
~ Hanning B Klone B Menzel B
Hardesty B Knappton B Merkel B
Harstine C Koehler C Meystre C
n Hartill B Koepke B Mikkald C
,
, Hartline B Koerling B Mippon B
LJ
Hartnit C Konert C Mires B
n Harwood C Kohner 0 Mobate C
Hatchey G Koseth B Molcal B
LJ Havillah B Kuhl 0 Moison B
Hesseltine B Kydaka 0 Mondovi B
M Hesson C Lacamas 0 Montesa C
, Heytou B Laketon B Mopang B
LJ
Heze! B Lance B Morical C
11 Hodgson C Latah C Moscow B
I Hoffstadt B Lates B Mossyrock B
LJ Hoh B Le Bar B Mowich C
Hoko C Leader B Moxee 0
[' Hoodsport C Leadpoint B Mukilteo 0
i
LJ Hoogdal C Leavenworth B Murnen B
Hoquiam B Lebam B Naches B
11
U Hydrologic Soil Groups
Figure 3-3.3
n
U Highway Runoff Manual Page 3-9
.cebruary 1995
11
l.J
/1
I
LJ Hydrologic Analysis
11
l.J Soil Name Class Soil Name Class Soil Name Class
Naff B Papac B Sagehill B
II Narcisse B Para B Sagemore B
I Nard B Pastik C Salal C
U Narel B Patit Creek B Salkum C
Nargar A Pedigo C Saltese 0
11 National B Peoh C Salzer 0
LJ Naxing B Peone C Sammamish 0
Neilton A Pheeney B San Juan A
11 Nemah C Phelan 0 Sarkin C
LJ Neppel B Phoebe B Satsop B
Nesika B Pickett C Sauvola B
Nespeleh B Pilchuck A Saydab C
(/ Netrac A Pitcher B Scam man G
U Nevat A Pogue S Schawana G
Nevine B Potchub C Schneider B
(/ Newaukum B Poulsbo C Schnorbush B
LJ Newberg B Prather C Schooley 0
Newbon B Prosser C Schumacher B
Newruss B Prouty B Scoap B
11 Newskah B Puget G Scoon 0
u Nighthawk S Puyallup B Scocteney B
Nimue B Queets B Scotia B
(/ Nisqually A Quilcene C Scrabblers B
LJ Nooksack G Quillayute B Sealak 0
Nordby A Quincy A Seastrand G
Norma B Ragnar A Seattle 0
11. Novark B Rainer C Sekiu 0
I
lJ Nuby G Raisic S Selah 0
O'Srien B Ralls B Semiahmoo D
11 Ocosta C Raught B Sequim A
, Odo B Reardan C Shalcar D
U Ogarty C Reed 0 Shano B
Ohana G Reichel B Shelton C
n Okanogan B Rennie 0 Si C
I
LJ Olequa B Renslow B Sifton B
Olete C Renton 0 Siler B
[I Olomount C Republic B Simode C
U Olympic B Ret C Sinclair C
Onyx B Risbeck B Sinloc B
Orcas 0 Ritel C Skaha A
n Oridia 0 Ritzville B Skamania B
, Orting C Rober C Skamo 8
LJ
Oso C Rock Creek 0 Skanid C
n Outlook G Roloff C Skate B
Ovall C Royal B Skeller B
U Owhi B Roza 0 Skipopa 0
Oyhut B Rufus C Skoly B
(/ Ozette C Rugles B Skykomish B
I Palix B Sacheen A Smackout B
LJ
Palouse B Sadie C Snahopish B
n
LJ Hydrologic Soil Groups
Figure 3-3.3
II
LJ Page 3-10 Highway Runoff Manual
February 1995
n
,
LJ
h
i
U Hydrologic Analysis
n
I
U Soil Name Class Soil Name Class Soil Name Class
Snohomlsh 0 Tebo B Waha C
,---, Snow B Tekison C Wahkiakum B
U Solduc A Tekoa C Wahlike C
Solleks B Tenino C Wahtum 0
!ana B Terbies B Waits B
11 ? Thout C Walla Walla B
(Spanaway
U ,.~ pelole Thow B Walville B
//.. Spe;s B Th ras h B Wamea B
n / Spofford C Tieton B Wanser B
\ // Spokane B Timberhead B Wapato 0
LJ
C lA.<;E b Springdale B Timentwa B Warden B
Spukwush B Timmerman A Washougal B
n
f Squally B Tisch C Weirman B
~-,.-
U I~U St. Martin C Tokul C Wellman A
..- \ e
( Of'.~(V<;\.-tI-.J Stabler B Tonasket B Wenas C
n 1': Si I in H if' Stahl C Toppenish B Westport B
I Staley B Touhey B Wethey B
U Standup B Townsend C Whidbey C
Starbuck 0 Track B White Swan C
n Startup B Tradedollar B Wiehl C
~
Steever B Traham B Wilkeson C
Stemilt C Triton 0 Willaby B
n Stevens B Tucannon C Willapa C
U Stevenson B Tukwila 0 Willis C
Stimson C Tukey C Winchester A
Strat B Tumac B Winston A
11 Stratford B Tyee 0 Winthrop A
~ Sulsavar B Uhlig B Wintoner C
Sultan C Umapine C Wishkah 0
r Sumas C Underwood B Wolfeson C
U Supplee B Undusk B Woodinville B
Sutkin B Vader B Yakima B
Swantown 0 Vailton B Yaxon B
n Swem C Vallan 0 Yeary C
,
I Sylvia C VanZandt B Yelm C
L.J
Synarep B Varelum C Yost C
n Tacoma 0 Vassar B Zen C
, Taneum C Verlat C Zenker B
l.J Tanwax 0 Vesta B Zillah B
Taunton C Voight 8 Zynbar B
r' Tealwhit C Wadams 8 Zyzyl B
LJ
Hydrologic Soil Groups
n Figure 3-3.3
i
LJ
II The SCS has developed maps for Washmgton State that show the speCIfic sod
LJ clasSIficatIon for any gIven locatIOn. These maps are compIled bv countv and are
tvpIcallv avarlable from the regIOnal SCS office. To deterrmne which sod group
n to use for :m ;malvsIs locate the project sIte on the SCS map and read the soIl
U clasSificatIon that IS lrsted. Use Figure 3-3 3 to convert from the speCIfic sod
clasSIficatIon to a hydrologiC soIl group The WSDOT Matenals Lab can also
f'
LJ Highway Runoff Manual Page 3-11
February 1995
[!
I
U
r
LJ
[
[
[
c
[
n
'L
l'
L
[
[
[
[
I'
~
l'
L
I'
L
C
C
C
[
APPENDIX 0
Maintenance Schedule
SKILLlNGS-CONNOLL Y, INC.
Consulting Engineers
Yelm Veterinary Clinic Expansion
Storm Drainage Analysis & Report
,.,
LJ
n
u
,.,
LJ
n
r
LJ
n
U
f'
U
II
LJ
f'
LJ
fI
LJ
n
LJ
11
lJ
f'
U
r
LJ
I'
~
n
I
lJ
I'
LJ
I'
.
LJ
n
u
n
u
MAINTENANCE CHECKLIST
Maintenance Checklist for Ponds
Frequency Drainage System ~ Problem Conditions to Check For Conditions That Should Exist
Feature
M,S General ~ Trash & debris Dumping of yard waste such as grass Remove trash & debris and
build-up in pond. clippings and branches into basin. dispose as pre-scribed by City
Unsightly accumulation of non- Waste Management Section.
degradable materials such as glass,
plastic, metal, foam and coated paper
M ~ Poisonous Any poisonous vegetation in which Remove poisonous vegetation.
vegetation may constitute a hazard to the public. Do not spray chemicals on
Examples of poisonous vegetation vegetation without obtaining
include. tansy ragwort, poison oak, guidance from the Cooperative
stinging nettles, devils club. Extension Service and approval
from the City
M,S ~ Fire hazard or Presence of chemica,ls such as natural Find sources of pollution and
pollution gas, oil, and gasoline, obnoxious color, eliminate them. Water is free
odor, or sludge noted. from noticeable color odor or
contamination.
M ~ Grass not For grassy ponds, grass cover is Grass cutting unnecessary
growing or is sparse and weedy or is overgrown. unless dictated by aesthetics.
overgrown.
M ~ Rodent holes Any evidence of rodent holes if facility Rodents destroyed and dam or
is acting as a dam or berm, or any berm repaired. Contact the
evidence of water piping through dam Thurston County Health
or berm via rodent holes. Department for guidance.
M ~ Insects When insects such as wasps and Insects destroyed or re-moved
hornets interfere with maintenance from site. Contact Cooperative
activities, or when mosquitoes become Extension Service for guidance.
a nuisance.
A ~ Tree growth Tree growth does not allow Trees do not hinder maintenance
maintenance access or interferes with activities.
maintenance activity (I.e., slope
mowing, silt removal, or equipment
movements). If trees are not
interfering with access, leave trees
alone.
M Side slopes of ~ Erosion on Check around inlets and outlets for Find causes or erosion and
pond berms or at signs of erosion. Check berms for eliminate them. Then slopes
entrance/exit signs of sliding or settling. Action is should be stabilized by using
needed where eroded damage over 2 appropriate erosion control
inches deep and where there is measure(s): e.g., rock
potential for continued erosion. reinforcement, planting of grass,
compaction.
M Storage area ~ Sediment Accumulated sediment that exceeds Sediment cleaned out to
buildup in pond 10% of the designed pond depth. designed pond shape and depth;
Buried or partially buried outlet pond re-seeded if necessary to
structure probably indicates significant control erosion.
sediment deposits.
A Emergency ~ Water obstructer Debris block outlet. Remove debris.
overflow
If you are unsure whether a problem exists, please contact the jurisdiction and ask for technical assistance.
Comments:
~
A = Annual (March or April preferred)
M = Monthly (see schedule)
S = After major storm
/l
LJ
/l
LJ
n.
~
r'
U
n
LJ
/l
u
n
~
/l
u
/l
I
U
/l
LJ
/l
LJ
c
n
LJ
/l
I
~
11
u
/l
U
/l
u
11
LJ
n
u
MAINTENANCE CHECKLIST (CONTINUED)
Maintenance Checklist for Infiltration Systems
Frequency Drainage System -V Problem Conditions to Check For Conditions That Should Exist
Feature
M,S General -V Trash & debris See Maintenance Checklist for Ponds. See Maintenance Checklist for
buildup in pond Ponds.
M -V Poisonous See Maintenance Checklist for Ponds. See Maintenance Checklist for
vegetation Ponds.
M,S -V Fire hazard or See Maintenance Checklist for Ponds. See Maintenance Checklist for
pollution Ponds.
M -V Vegetation not See Maintenance Checklist for Ponds. See Maintenance Checklist for
growing or is Ponds.
overgrown
M -V Rodent holes See Maintenance Checklist for Ponds. See Maintenance Checklist for
Ponds.
M -V Insects See Maintenance Checklist for Ponds. See Maintenance Checklist for
Ponds.
A Storage area -V Sediment A soil texture test indicates facility is Sediment is removed and/or
buildup in not working at its designed capabilities facility is cleaned so that
system or was incorrectly designed. infiltration system works
according to design. A
sediment trapping area is
installed to reduce sediment
transport into infiltration area.
A -V Storage area A soil texture test indicates facility is Additional volume is added
drains slowly not working at its designed capabilities through excavation to provide
(more than 48 or was incorrectly designed. needed storage. Soil is
hours) or aerated and rototilled to
overflows improve drainage. Contact the
City for information on its
requirements regarding
excavation.
M -V Sediment Any sediment and debris filling area to Clean out sump to design
trapping area 10% of depth from sump bottom to depth.
bottom of outlet pipe or obstructing
flow into the connector pipe.
One Time -V Sediment Storm water enters infiltration area Add a trapping area by
trapping area not directly without treatment. constructing a sump for settling
present of solids. Segregate settling
area from rest of facility
Contact City for guidance.
If you are unsure whether a problem exists, please contact the jurisdiction and ask for technical assistance.
Comments:
~
A = Annual (March or April preferred)
M = Monthly (see schedule)
S = After major storm
n
u
n
l.J
['
I
l.J
n
l.J
r'
l.J
n
LJ
n
u
n
u
n
l.J
n
L
n
I
~
!
l.J
n
l.J
n
u
r
~
n
l.J
n
u
n
LJ
n
LJ
MAINTENANCE CHECKLIST (CONTINUED)
Maintenance Checklist for Fencing/Shrubbery Screen/Other Landscaping
Frequenc Drainage Problem Conditions to Check For Conditions That Should
y System " Exist
Feature
M ~ Unruly Shrubbery is growing out of control or is Shrubbery is trimmed and
vegetation infested with weeds. weeded to provide
appealing aesthetics. Do
not use chemicals to
control weeds.
If you are unsure whether a problem exists, please contact the jurisdiction and ask for technical assistance.
Comments:
rl
LJ
n
LJ
I
u
n
LJ
11
I
LJ
I'
I
LJ
n
LJ
n
LJ
n
,
u
[
I'
~
11
I
LJ
n
LJ
n
lJ
[I
,
u
r'
u
n
I
LJ
11
LJ
n
u
MAINTENANCE CHECKLIST (CONTINUED)
Maintenance Checklist for Conveyance Systems (Pipes. Ditches, and Swales)
Frequenc Drainage Problem Conditions to Check For Conditions That Should Exist
y System -J
Feature
M,S Open ditches -J Trash & debris Dumping of yard wastes such as grass Remove trash and debris.
clippings and branches into basin. Unsightly
accumulation of non-degradable materials
such as glass, plastic, metal, foam and
coated paper
M -J Sediment Accumulated sediment that exceeds 20% of Ditch cleaned of all sediment
buildup the design depth. and debris so that is matches
design.
M -J Erosion See Ponds Checklist. See Ponds Checklist.
damage to
slopes
A -J Rock lining Maintenance person can see native soil Replace rocks to design
out of place or beneath the rock lining. standard.
missing (if
applicable)
Varies Catch basins -J See Catch Basins Checklist. See Catch Basins Checklist.
M,S Swales -J Trash & debris See above for Ditches. See above for Ditches.
M -J Sediment See above for Ditches. Vegetation may need to be
buildup replanted after cleaning.
M -J Vegetation not Grass cover is sparse and weedy or areas Aerate soils and reseed and
growing or are overgrown with woody vegetation. mulch bare areas. Maintain
overgrown grass height at a minimum of
6 inches for best storm water
treatment. Remove woody
growth, recontour and
reseed as necessary
M,S -J Erosion See Ponds Checklist. See Ponds Checklist.
damage to
slopes
M -J Conversion by Swale has been filled in or blocked by shed, If possible, speak with
home-owner woodpile, shrubbery, etc. homeowner and request that
to swale area be restored.
incompatible Contact City to report
use problem if not rectified
voluntarily
A -J Swale does Water stands in swale or flow velocity is very A survey map may be
not drain slow Stagnation occurs. needed to check grades.
Grades need to be in 1-5%
range if possible. If grade is
less than 1%, underdrains
may need to be installed.
If you are unsure whether a problem exists, please contact the jurisdiction and ask for technical assistance.
Comments:
~
A::; Annual (March or April preferred)
M ::; Monthly (see schedule)
S ::; After major storm
r,
LJ
1'1
L.J
11
u
n
LJ
11
LJ
11
LJ
n
LJ
f1
U
11
LJ
f1
,
I
LJ
11
LJ
11
LJ
11
u
n
LJ
n
u
11
u
11
u
n
u
11
i
U
MAINTENANCE CHECKLIST (CONTINUED)
Maintenance Checklist for Grounds (Landscaping)
Frequen Drainage Problem Conditions to Check For Conditions That Should Exist
cy System .
Feature
M General ~ Weeds Weeds growing in more than 20% of the Weeds present in less than 5% of the
(nonpoisono landscaped area (trees and shrubs only). landscaped area.
us)
M ~ Safely Any presence of poison ivy or other No poisonous vegetation or insect nests
hazard poisonous vegetation or insect nests. present in landscaped area.
M.S ~ Trash or See Ponds Checklist. See Ponds Checklist.
litter
M,S ~ Erosion of Noticeable rills are seen in landscaped Causes of erosion are identified and steps
ground areas. taken to slow down/spread out the water
surface Eroded areas are filled, contoured, and
seeded.
A Trees and ~ Damage Limbs or parts of trees or shrubs that are Trim tree/shrubs to restore shape. Replace
shrubs split or broken which affect more than trees/shrubs with severe damage.
25% or the total foliage of the tree or
shrub.
M ~ Trees or shrubs that have been blown Replant tree, inspecting for injury to stem or
down or knocked over roots. Replace if severely damaged.
A ~ Trees or shrubs which are not adequately Place stakes and rubber-coated ties around
supported or are leaning over, causing young trees/shrubs for support.
exposure of the roots.
If you are unsure whether a problem exists, please contact the jurisdiction and ask for technical assistance.
Comments:
~
A = Annual (March or April preferred)
M = Monthly (see schedule)
S = After major storm