20020239.pdfan DATE RECEII E
PERMITEXPIRES
P MIT
CITY OF EDMONDS �U.SFE 'ER
UM"R
CONSTRUCTION PERMIT APPLICATION JOB "'T775
ADDAES'
N
OWNER RAM AME Op-muSIN as Q I-
M(Z% S PLAT NAMFISUBDIVISION N7 LOT NO, LID NO O'JWSD
MAILING ADDRESS
.7 LID FEE $
PUBLIC RIGHT OF WAY PER OFFICIAL SmIET MAP III r- �ad
Pa.,: Fare
CITY X
ZIP TELEPHONE EXISTING PROPOSED— =rrhslad 13
P.,as.a 13
REQUIRED DEDICATION— IT ti-g—
ass 'reed 0
NAME METER SIZ LINJ� SIZE I No. OF'j;RES 11V REQUIRED
to YES No 13
PE.A..
OWNERICONTRACTOR-RESPONSIBLE FOR EROSION CONTR HUDRAINAGE
ADDRESS
FIRE REVIEWPI1 By
AT F.
ciCITY
EP�ION�o
l 616111
1,1TIC
q- 30q 0
, STATE LICENSE NUMBER
EXPIRATION
VARIANCE OR CU
SHORELINE OR ADS#
INGPECTI N
0
REOG
PDO D
OSTED
'JA,-tZC—t-oI�?-VA
E3YES [31,10
j'PROPERIN'TAX ACCOUNT PARCEL NO.
SEPA REVIEW
COMPLETE EXEMPT
SIGN AREA
A�7 PROPOSED
HEIGHT
ALLOWED PROPOSE
5 210 3
c, C)o -� C) 4/4
EXF ,
J� 1 N/A
_GI ?I
2 1
NEW
RESIDENTIAL
'OD�U.1013111G I ME.11
LIT
ALLOWED PROPOSED
RE IRE SETBACK' IFTI Plop SED SETBACK$ (Fr.)
NTt SIDE REAR FRON LJ,71DI BEAR
ADDITION
COMMERCIAL
COMPLIANCE OR
. I
7'1,i 144k.
CHANGE OF USE
REMODEL
APARTMENT
SIGN
PARKING
REGC
LOT AREA
ROVID U
NO RE
E
rl REPAIR
FENCE
CYOS X FT)
RE?
0 DEMOLISH
0 TANK
Le�YAV rt�,W NID FI4ZDA-Lr-- AVIF-7--
ARAGE
JOA-P-111`
RETAINING WAU.
0 ROOKERY
RENEWAL
- - �1-&t
Me-,
OWE OF USE. BUSINESS OR ACTIVITY) EXPLAIN:
WE N�zw '.�-
P Q
CHECKED try
ITY E 01 CONSTRUCTION jCq�
NUMBER
OF
NDUIME EINGF
WANT
0 STORIES
UNITS
DESCRIBE WORK TO BE DONE
VAUJATION $
LU r in
rDescrlpflon FEE Description FEE
03C 'Pt'O
Plan Check hT;5
HVGURCE GILAVNG % ",T 'jpjl� Building
".pri
PIAN CHECK NO: 2 Plumbing
GAP
VESTED E
THIS PERMIT AUTHORMS ONLY THE ORKNOTED. THIS PERMIT COVERS WORK TO Mechanical
DONE ON P I
1: 01 11 VATE PROPERTY ONLY. ANY CONSTIR 1*1411,1111""uc
Is ONAIN (CURSS, SIDEWALKS, DRIVEWAYS MARQUEES, ETC.) WILL
Grading
1
C,7
Recording Fee
SEPARATEPERMiSSION.
2
9 RE IT APPLICATION: ISO DAYS
USE - E YEAR - PROVIDE
A. PERUM UMM I 'I-. D WORK HISTAITTEO WITHIN INDAYS
SEEBACKOPPINK PERMIT FOR MORE INFORMATION
Engr. Review
City Surcharge
EngE. Inspection
state Surcharge
'APPLICANT ON BEHALF (IF His OR HER SPOUSE, HEIRS. ASSIGNS AND SUCCESORS
R
IN INTE EST, AGREES TO INDEMNIFY DEFEND AND HOLD HARMLESS THE CITY OF
Traffic Mitigation
Plan Chk Deposit
EDMONDS, WASHINGTON ' ITS OFFICIALS, EMPLOYEES, AND AGENTS FROM ANY AND
ALL CLAIMS Fort DAMAGES OF WHATEVER NATURE, ARISING DIRECTLY OR INDIRECTLY
FROM THE I SUANCE OF THIS PERMIT ISSUANCE 01 THIS PERMIT GFIAIL Nor BE
DEEMED TO MODIFY, WAIVE OR REDUCE ANY REOUIREMENT OF A Y CITY ORDINANCE
Fire Review
Receipt #
KA
/
Fire Inspection
Total Amount Due
3�41
0 N C
se OR LIMIT IN AM WAY THE CHYS ABILITY TO ENFOR E ANY ORDINANCE PROVISION -
Landscapeinsp.
--IpE —#�
I HEREBY ACKNOWLE GE THAT I HAVE READ THIS APPLICATION; THAT THE INFORMATION
GIVEN IS CORRECT. AND THAT I AM TLIE OWNER. OR THE DULY AUTHORIZED AGENT OF
APPLICATION APPROVAL
THE OWNE . A THO'COMILY WITH CITY AND STATE I -Awl 11GULATING CONSTTIUC
TION; AND IN DO G TH ORK AUTH.SVE. THEREBY. Is PERSON WILL E EMPLOYED
IN VIOLATION T1 a " .0. CODE OF THE EITATE OF WASHINGTON RELATING TO
WORKMENS S ION INSURANCE AND RCW 1827.
CALL
FOR INSPECTION
(4251
11seapplicatian IsIsi. perb.,111,ighed by We
B11IdiI9 Offical or his/her DepIty: We Feet are paid, ard
Tocerplar8oklmledgedilsipaid, provided.
OFF JAILS SIGNATURE DATE
"iIGNATUR AGENT) ONED
III-lopt, lf.401=1 ��
771-0220 ft��T-AUE- BY DATE
ATTENt" EXT 1333
IT IS UNLAWFUL TO USE OR OCCUPY A BUILDING OR STRUCTURE UNTIL
A FINAL INSPECTION HAS BEEN MADE AND APPROVAL OR A CERTIFI- 771-0221 ------
OREGINAI � FILE YELLOW - NSPE�
CATE OF OCCUPANCY HAS BEEN GRANTED, UBC SECTION 109 FAX PINK - OWNER COLD � ASSESSOR
10/01
z
M
M
0
80
a
M
M
-z
W
0 -n
IT
RR M
- Cl)
0 r-
0 M
a (a
91:0
Q 0
z
�2
ri)
z
9
0
rn
NOTICE. IF THE DOCUMENT IN THIS FRAME IS LESS CLEAR THAN THIS 40TICE
IT IS DUE TO THE QUALITY OF THE DOCUMENT
C)
M -E
IMPERVIGUS SURTAC CALCS; *41L
87.42' R 390
C:) w
>
C= LLJ
n
ED
tt f
P-p-d Suit." R, ' . 2,555 i;f,
P-p-d V-W� Ft— 1,1549 -f,
-P 7
P p-d G-g. � 454 F.
45 4
Fr �"r� F 0.tt�.
N
:]
15'
_IBAC�S
SE
CD
(1)
CD u
c) w
;K
0
Co -i
Lu
(D
P rI . L,3W ft.
P-p-d BrI.-y 1,353
P-p-d Vaw-y� 134 sf.
0
-j
W
LI- 03
P P opospd Umk, 114 sf.
POP h - IL16 5F-
ux (y)
p-
d v.r
P,op-d overed
C:)
RELENT CALM
W
n
LL
A -103'
*11"
CD
0 Cu
rAvE.GRAUE
PROPOSED
- Lj C)
> co
U 101.75'
.75'
ACTUAL CRADE 120,25-
RESIDENCE
1649 SQ.
u < o-,
::D
U,
.,75V
HAXD4UM GqAVE 12f
X.M G� I
LOT COVERAGE
Fw�
<r
3,610 SiXT. (47YD
0 ry
u
LOT AREA
PROPOSED 7.5'
V K GARAGE
L�
8,059 SaM
AY 454 SO
I.. A�-M� P.rc-I 4
C .101,
r4
Z 6-
w
z
2703-360-03a-4400
-10
7.5'
0
T
U,
LOT SLOPE
u
7
LESS THM 5Z
w
bj ()J
20'
ov D
DRIVEWAY
u
w
SCALE I'=20'
DRAINAGE PLAN
ACCORDING TO
DATM POINT -IM'
CM 65, NORTH OF
<:
SP
SEMACKS.
FMPERTY LINE
c
FRON I
15' DRIVEWAY EASEMENT ON LOT B
IL
FOR A,B AND C TO FIRDALE AVE. W-
IT -H
HEIGHT
.. ....... . .
IMPERVIOUS SURFACE CALCS.
Proposed Bulldtmq Roof OutUme s 2,555 sf.
Prop ... d Hot. Floor � 1,649 f.
'lop . d Gr.g. - 454 F.
P P:se
r. ed D,Neway 1,353 sf,
Proposed Watkways 134 SF.
Proposed Deck , 114 sf.
Proposed Covered Porch , 106 of.
HEIGHT CALCS.
A :,1.13'
B I
C .10'
D ,or
AVE. GRADE = 101.75'
ACTUAL GRADE 12025'
MAXIMUM GRADE 126,75'1
LOT COVERAGE -
3,610 SQ.FT. (47%)
LOT AREA
8,058 SOFT.
Tax Account Parcet #
2703-360-030-4400
LOT SL13PE
LESS THAN 5X
C.0
1
C)
LA (D cD
0— w _j —
z C:)
Cu
Lli C)
U > CC)
< M
L'i
z
L)
CD
CLI ED
z m 2:
ce) f::l
(U Lj
C—)
LLJ Ctj
I
(A
NOTICE: IF THE DOCUMENT IN THIS FRAME IS LESS CLEAR THAN THIS NOTICE
IT IS DUE TO THE QUALITY OF THE DOCUMENT.
3loa 3&o
C:)
GRADING CALCSI LCCEPPTT HTLINE 87,42' R I lym CD
490% P9 VIEW
SECTION I SATI91,111AA TER/SEI VER DATHICT
AVE CUT llf� 3DR 3 FN " _-15'
CUBIC YARDS 3CH 40 SETBACKS ##
SECTION It Y -120, 20' c:) m
i:810 CD
AVG, CUT Of �10
CUBIC YARDS = 73.11 FIT �a LLJ (y) 44-
ITOTAL CUBIC YARDS 119.15 SCALE 1'=20' 14' al U M
7.5� �9-1 O� CD 1--
LOT COVERAGE 1 Tax Account Parcel# it 27.5' ":1: CD
(IL oi
3,810 SOFT. (47X) 2703-360-030-4400 SECTION 11 21.51 7.5' Ic
LOT AREA LOT SLOPE - DRAINAGE PLAN 14' z �i: c)
PROPOSED 0 cu
8,059 SOFT. LESS T14AN 5% ACCORDING TO RESIDENCE — Lj C:)
SP 97-009 1-- > co
u
FILTER FARRIC ::) < O's
SECMED TO 2- X e SECTION I
14 VIRE FABRIC Li
E.— _j
B. T 5'
'EUIVALENT 14' 37' z m
E3 fy-
22, 7.5' A, U
W Lk Li- fz�
AY
�U z w
0` 75' U -Y < I P:l
2--2s .11 - < Li
FILTER FABRIC FMC THC —CE.
L
ICD
le
Y Li
10 DRIVEW Y 0."
—i
<
u
n 7"
wL u LLUI
u
DATUM POINT �1001
CB 65' NORTH OF CL
9! PROPERTY LINE
.13 ca
<
--j
&L D)ae�--raq -r-o 15' DRIVEWAY EASEMENT ON LOT B
CIG & SIDEWALK 'FORM V14�7%cr—tjo�4 W. n
FOR A,B AND C TO FIRDALE AVE
lN5Ft(; I IONS REQUIRED dA-We,&--ftq
ED
CD W
GRADING CALCSI
SECTION I, &L EXPOSE) SUR118 Z_— 6 A q
AVG, CUT R E I
CUBIC YA WITH SETBACKS
ol — T J
SECTID 11 20'
AVG. CUT OF 3.5' CD
Ljj
CUBIC YARDS = 73.11 �SST�.DCZTqMl' U (y)
TOTAL CUBIC YARDS 119.15 SCALE 1'=20' 14'
7h QL� CD
jo3r 5' 27.5 "- CD
LOT COVERAGE � Tax Account Par�l # 1 9.51 cu _j
3,810 SOFT. (47.1.) 2703-360-038-4400 --'�CTION 11 2L5' � ) z
LOT AREA LOT SLOPE , DRAINAGE PLAN 14' 7.5' CD
PROPOSED cl cu
8,059 SGFT. LESS THAN 5*/ ACCORDING TO RESIDENCE LJ CD
SP 97-009 48.5' > cc)
u
FILTER ---\ :D
�EEURE T. Z� . V _ SECTION I bj
14 GI IRE FARM 20'
E.RL 14.5' _j
SPO t LE FOR
.CMKRJC:)NT OTOR IS RESSPO
C.LI-EIERO 5'
ION ONTROL A P4 NIAGE 14' 37' 0
22' 7.51 U
0% W LK
4gl
H,7 6�104 AY
,IA p
7.5'
PLACE E—L 1. EU L9
_ lRr— — . ..I. —� �
r", I.RRII E I.E —IACI.
F4�
z
Li cd a
LL
A-s 'E' DRIVEWAY
-i < LL
<
u
ul :2
> LL
r'*-'X'- Dr.-
NLL(
FP'S DATUM 'PMNT �101)'ZS57
V A CB 65 NORTH OF
PROPERTY LINE
- 9. '1IRDALC z
frowg 01-12 PAA) 15' DRIVEWAY EASEMENT ON LOT B -i
C&.* fi9M*,*-fORM,-- FOR A,B AND C TO FIRDALE AVE, W. CL
INSPECTIONS REQUIRED
4
Rf
Janris Construction
Technical Information Reporl
Table of Contents
i Project Overview
2. Conditions and Requirements Summary
IJ
3. Off -Site Analysis
4. Retention/Detention Analysis and Design
5� Conveyance Systems Analysis and Design
6. Special Reports and Studies
7. Other Permits
8. Erosion/Sedimentation Control Design
9. Bond Quantities Worksheet, Retention/Detention Facility
Summary Sheet, and Declaration of Covenant
10. Maintenance and Operations Manual
List of Figures
Figure 1 TIR Worksheet
Figure 2 Site Location
Z'
0
4
p 3
p 3
p 3
0,
-40.
1"
0 Ci'
p 3
b :J'cl
p 4
c: Z:
p 4
p 4
'0
0
p4
C
p 4
p4
z
Z'
2
1. Project Overview
This project consists of three new SFR's and associated walk and driveways being
built on three 8,000 s.f. lots created as a short plat in the late 90's. The plat concept
is
was for a detention pipe discharging to the Firdale drainage system. As the site
underlain by a deep deposit of Everett soils, the new impervious is being infiltrated in
accordance with the King County Design manual that states that all lots on outwash
z
soils shall be evaluated and if feasible infiltrated. The total proposed new impervious
0'
is 10,871 s.f. for all three lots. A TIR Worksheet is attached as Figure 1 and a site
0
vicinity map is attached as Figure 2.
M,
con
2. Preliminary Conditions Summary
The site is in the City of Edmonds and bounded by 1 001h Ave W and Firdale Ave W.
0
0 0
The site is underlain by Everett soils.
3: M
M41
3. Off -Site Analysis
C z
All flows will be infiltrated. Any overflow of the system will flow in the same drainage
path as it does now to the system along Firdale as originally proposed by the short
M M
plat..
ra,
0
In summary the off -site topographical and vegetative conditions suggest no unusual
C: co
drainage or erosion problems.
M 0
z
4. Retention/DetentionMater Q uality Analysis and Design
No off -site flows are coming on -site within the area of development. On site flows
z
are being infiltrated in infiltration trenches. The 98KCSWDM requires residential
sites with less than 22,000 s.f. to be evaluated for infiltration.
z
three soil log holes and three infiltration tests. The
0
M
The site was evaluated using
tests showed the soils to be course sand and gravel draining much in excess of the
maximum design rate of 20 in/hr. All holes drained within 5 minutes and could not
actually be kept filled. No mottling or evidence of water was obs erved in any of the
holes to 4' depth.
The roof downspouts are going to infiltration trenches and the drive runoff is being
sheet flowed to a saps rate catch basin and infiltration system for each lot. These a re
shown on the attached site grading plans.
3
5. Conveyance Systems Analysis and Design
The only conveyance is by 4" PVC as directed in the KCSWDM required downspout
infiltration details.
Z
6. Special Reports and Studies
0;
No special reports are required.
7. Other Permits
C M
m ag
No other permits are required.
0'
0 C:�
XM:
10
8. Erosion/Sedimentation Control Design
Sift fence had been provided on the design drawing downstream of any proposed
-<
01
disturbance.
The required construction entrance is shown on the plan.
0
0
C:
9. Bond Quantifies Worksheet,
M 0:
Z
Facility Summaries, and Declaration of Covenant
A Bond Quantifies Worksheet is not required for a small site Appendix C application.
No covenant is required.
Z:
10. Maintenance and Operations Manual
0
M
Not required.
4
rr,
LL
"6
ME
I, . . . . . . . . . . .
is -
I MIN-
!, ma
pp�
King County Department of Development and,Environmental Services
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
P,
k-',
-pait,L1 PR -,T,:OWN&,ANb�
ojEC
-P PROJECTwLOCATI
ION 1:
IP"
iENG34EERI--;.;��*�;..
oloct SMze,'
Project Name
ik,
Address
Location
Township
Z'
Phone
Range
0
:1
, &�
............. Section 2iU
0
R).
Project Engineer
Company--
M
Address/Phone
C a
m 0
-a r D
"P' ERM. Yr
0,
C,
. . . . . . . . ....
Shoreline Management
m
Subdivison DFW HPA
Short Subdivision COE 404 Rockery
Grading DOE Dam Safety Structural Vaultb
Commercial FEMA Ficiociplain Other
*x--
-n
1:6) \0A
Othei 9121;-P"2-k COE Wetlands
m m
0
0
part. !f,r OMM BASI
C:
M 0
z
community
Drainage Basin
z
Part.6.�; sr-mcHARACTERISTICS:-
Z
lain
River Floodplain
0,
m
Wetlands
(SP r
Seeps/Springs
Critical Stream Reach High Groundwater Table
ro
Depressions/Swales Groundwater Recharge
Lake Other
Steep Slopes
Sall Type. Slopes
Erosion Potential Erosive Velcotles
Addibonal Sheets Attached
Z,
0
WIT
CM)
REFERENCE
UMITATION/SITE CONSTRAINT
inanm*s
Ch. 4 — Downstream A I M—
m
C
M
-400
0 C
m:
----------
in Z:
> z
Additional sheets Attached
0
mm
MINIMUM ESC REQUIREMENTS
MINIMUM ESC REQUIREMENTS
0
0 Fn,
DURING CONSTRUCTION
AFTER PDNULUCTION
C 0)
tabilize Exposed Surface
z (a
0
St KI onstruction Entrance
Remove and Restore Temporary ESC Facilities
Perimeter Runoff Control
Clean and Remove Ail Slit and Debris
Clean Gram, Restrictions
ctices
Ensure Operatio n of Permanent Facilities
Flag m f SAO and open space
z
i:
preservation areas
Other
z
Other
m
P�11�'-- �&il 86RFACE-WATEKSY�§T
Method of Analysis
Grass Uned Infiltration
Tank
Channel Vault sion mp at at
00 Ins l0r'MItI9
Pipe System Energy Dissapator Flow Dispersal on of Eliminated Site
open Channel Wetland Waiver Storage
Dry Pond stream Regional
Wet Pond Detention
z
0
Brief Description of System Operation
0
M"
Facility Related Site Urnitations
'n
i!
Reference Facility Urnitation
m
a
0
0
C,
J
r.
m m:
v,
7-R -Y
S�M TSM CTS
Pa 2 EA S[179ACTS:�
C 2:
Cast in Place Vault
a
Drain: - Easement
re .9
Retaining Wall
=ENA
e t
asement
Acs.. E s
0 'n,
Ro ckery > 4' High
Native Growth Protection Easement
t V. Growt P rot tic
n x
X,
—Strmucdtural-on-SteeP-tSsllOPe---.---
rn m
Other
ter
Other
0 Fn
C M
EN
.4 �SIGNATURE.0FPROFESSIONAL GINEER-
Paimas'.
I It.
ision have visited the site. Actual site
I g t
I or a civil engineer under my supervision my supery
ants. Toth. best of
ra into this worksheet and the attac hments. To the best of
conditions as observed were incorporated
s 0 s
my knowledge the information provided here is accurate.
z
Z,
signedlUate
m
NOTICE: IF THE DOCUMENT IN THIS FRAME IS LESS CLEAR THAN THIS NOTICE
IT IS DUE TO THE QUALITY OF THE DOCUMENT.
110 W
Ll
VT,
; Ell
4�N
NOTICE: IF THE DOCUMENT IN THIS FRAME IS LESS CLEAR THAN THIS NOTICE
IT IS DUE TO THE QUALITY OF THE DOCUMENT.
CD
CD
Ln
GRADING CALCS 0.96 1 tw
SECTIUN I
Avc, CUT OF aw
CUBIC YARDS = SWI CD <
—J 1,D
IRE IWIC
AVG, CUT OF 3,5' WE -Ile W (y) #I:
CUBIC YARDS - M-74 U
r �/ DIR
TOTAL CUBIC YARDS T13CK it fy- c)
c <F
r- CD
(L ctj -J
7.5'
0 oj
Ld CD-
0 1-- > OD
u < ON
LOT COVERAGE 33, SECTION 11 ry W
3,473 SQFI- C399> _j m
W <
LOT AREA PROPOSED :7 p p
RESIMDE�N!ECE M
3
e,o-,t sQ-FT- 4v C-)
T.. A—unt p:l
co
fu z
703-36o-m-450a
CTION I
Lall —SL"PE 1.4 po ZA
LESS THAN 5% <
33' We
fu
0 lz
C)
Lti 0i
3-4 ?9' A -i
)SCALE 1'=20' <1 -q
u fo
DRAINAGE PLAN
ACCORDING TO RIVEWAY I re
SP 97-009 2 C.0 ca
LD
DWATIMM P +law
9 CD 13a, OF
Pam-,RTY LIM
<
0�
15' DRIV�WAY EASEMENT ON LOT B LD o—
FOR A1,13 AND C TO FIRDALE AVE. W.
IL am, -m—f ffl:,-7
NOTICE: IF THE DOCUMENT IN THIS FRAME is LESS CLEAR THAN THIS NOTICE
IT IS DUE TO THE QUALITY OF THE DOCUMENT
360
07.4
C)
c--)
GRADING CALCS.
SECTION 1,
�3-
c:)
AVG. CUT 137 2' 46.G4
-
SE]:BACKS
:tt (y)
CD
CUBIC YAOS
c:)
pq
SECTION 11,
AVC, CUT OF 3.5'
CUBIC YAR13S = 7331 C., 'it DEC
9
1 �,D
(y)
C) (y)
:W-
Lo
TOTAL CUBIC YARDS - 119-15 SCALE 1'=POI
27.5
ry CD
1--
A
LOT COVERAGE # I
9.v
if 2t5'
f) ()j
—j
Z703-3ro-M-4400
14' SFCTJON 7�5'
z
ca
L(:T AREA LOT SLOPE � DRAINAGE PLAN
,FT. LESS TMAN 5Y ACCORDING TO
Pq
01. OpOSED
�0- RES113ENCE
0
—
1--
(u
CD
SP 97-009
ti 48.5'
>
Q
ob
SECTIEN I
ly
ME POM
1--
14.5'
'14' 5'
E.1
37'
El
0
c, 22, 7.5' P
U
0
v LK
AY
4(Y
* ;K
7"
El
z
pal
:Em
w
A
0
7. J()u)
ow
Ljj
I.r M- 0. M. Z
C)
00
D
w
-j
cu
u
Ea
LU
to
:I-
x
CE
L,
DATUM PONT -100'
c &;ntvy
0
PuE
z
<
iz
15' DRIVEWAY EASEMENT ON LOT B
L3
CL
FOR AB AND C TO FIRDALE AVE, W.
LL
mm- =6
I,GRA41RG'
SECTMH I
AV& EuTir a, -
dqz;c yAROS i- 66.74
SEMI!*
Ava OF
MOM YARDS M7
TOTAL CUBIC TARDS - IA
LOT COVERAGE -
0,986 S%FT. (377)
LOT AKA �
8,016sarl.,
C:,]
C3
C)
�oC)
u
ol
15'
__1
CD
_j �'D
W (Y)
C-) c)
SCALE 1'=20'
1119T
ry C:)
C>
T.x A..O—t PllMet # I
TOCK P1
_J
?703-36v-030-430
CD
LOT SLOPE
545'
w
oj
Len T"AN 5'lVo4-e - Aill
>
co
U
4-
PROPOSED
RESIDM
3V
34'
W
_j
",-SECqiM 1
, W, 'T
%, z
be 0(
m
ED X
LL
2:
5.51
la,
H
5.5
r ca
SFCT�1'11N 11.
A K
y cm)—e
<
-37
LLJ
VIL C)
lAJ cu
y
u
7ol
_j
OA DA" PUNT
_ ;A 0 Lo
T_ 1
CAT(:" BASM
DR GE PLA pi z
CC R ING TO < <
ENT ON LOT B
5' EWAY EASEM w ix _j
DRIV
SP C To V
FOR A,B AND -C TO FiRIDALE AVE. W. Lj n
5.1.1 DOWNSPOUT INELTPATION SYSTEMS
FIGURE S.I.I.A TYPICAL DOWNSPOUT UOUTRATION SYSTEM
7
/—roof
drain
PLAN VIEW
4- dgid or Wflexible
NTS perforated pipe Z'
O�
...........................................
0,
M,
................................................. '-i -n
infiltration trench suml i w/solld lid
a rk
3
0
C)
PLAN VIEW roof drain
rn
z
NTS q
overflow z
e dgid or 6'ffe)dble splash block
perforated pipe
On
hr—y* ... .....................
6' MML
------------- ---
hod k 5.0'min. 0
1 1/2"- ml
C ca
fine me h CB sump w/sofld lid K (W
0i
10' in
varies
L—*A
fifterfabrio z
acted backfill
comp
z
V rigid or fle4ble
perforated pipe
24"
V
washed rock
av
12T" aa 1 1/2"-3/4"
.�7
24.
SECTION A
NTS
911/98
1998 Surface Water Design Manual
5-7
SECT[ON 5.1 ROOF DOWNSPOUT CONTROLS
FIGURE 5.1.1-B
ALTERNATIVE DOWNSPOUT INFILTRATION SYSTEM FOR COARSE SAND AND GRAVEL
from roof
Z'
011
P
grass
6. min
Overflow
Oi
R'4i
111Y-310
NOTE: Same length dimensions
0 C,
M rn�
Washed rock
18'm1n
and site limitations as typical -system
16
tg
LZ I Tmin
min
-X-SECTION--
im M
NTS
0
Fn
C R
A
q
v
zx�
1998 Surface Water Design Manual
9/1/98
-' ;,zZ
e)
14%
Z;;
ck,
i
7 77
EPA
OKA
M
AA
M:,
m
00
On,
mm
c
K CA
PH
'Zo
e,
kt,
0:n
LILI
0
ifi
T
p
-d
-q
fo
tr
XC�.l 3W3S
ul
(n
33
:x
5.1.1 DO"SPOTJT INFILTRATION SYSTEMS
E14EMTRATION SYSTEMS
5.1.1 DOWNSPOUT
Downspout infiltration s3ulems are trench systems intended only for use in infiltrating runoff from roof
downspout drains. They are not designed to directly infiltrate surface water that could transport sediment
or pollutants, such as from paved areas.
0 BASIC REQUIREMENTS
1. Single family subdivision projects subject to Core Requirement #3 must provide for individual
downspout infiltration systems on all lots smaller than 22,000 square feet if feasible.
2. The feasibility or applicability of downspout infiltration must be evaluated for all subdivision single
family lots smaller than 22,000 square feet. The evaluation procedure detailed below shall be used to
determine if downspout infiltration is feasible or whether downspout dispersion can be used in lieu of
infiltration. This procedure shall also be used to evaluate all projects proposing to apply roof
downspout controls as flow control BMPs per Section 5.2.
3. For subdivision single family lots greater than or equal to 22,000 square feet, downspout infiltration is
infiltration
optional, and the evaluation procedure detailed below is only required if downspout is
being proposed voluntarily. Note: 1fdownspout infiltration is not required orprovided on these lots,
then a downspout dispersion system must be provided per Section 5.1.2 (p. 5-9).
C3 PROCEDURE FOR EVALUAIING FEASIBILITY
1. A soils report must be prepared by a geotechnical engineer. The report must reference a sufficient
number of soils logs to establish the type and limits of soils on the project site. The report should at a
minimum identify the limits of any outwash type soils (i.e., those meeting USDA soil texture classes
ranging from coarse sand and cobbles to medium sand) versus other soil types.
2. On lots or sites with no outwash type soils, a downspout dispersion system per Section 5.1.2
----�---��-----(p.--5z9)-may-be-used-iTr-lieu-af-infiltration�-If-downspout-irifiltration-is�still-desired-to-qualify-for-flo.w—,
control sizing credits, it must be shown to be feasible as described below.
ting
al site -specific its
3. On lots or sites containing outwash type soils (coarse to medium sand), addition
must be done. Individual lot or site tests shall consist of at least one soils log, a rninimum of 4 feet in
o and the USDA textural class of the
depth (from proposed grade), identifying the SCS series of the s il
soil horizon through the depth of the log, and noting any evidence of high groundwater level, such as
ltration is being
mottling. Note: This testing is also required on lots or sites where downspout i . nfl
proposed in soils other than outwash.
4. If site -specific tests indicate less than 3 feet of permeable soil to the seasonal high groundwater
table, then a downspout dispersion system per Section 5.1.2 may be used in lieu of infiltration. If
downspout infiltration is still desired to qualify for flow control sizing credits, the minimum 3-foot
depth to groundwater may be met by using fill material as allowed in the design criteria below.
5. On lots or sites with more than 3 feet of permeable soil to the seasonal high groundwater table,
downspout infiltration is considered feasible and mandatory if the soils are outwash type soils and the
infiltration trench can be designed to meet the minimum design criteria specified below. Voluntary
provision of downspout infiltration must also meet these design criteria in order to be approved as
feasible.
[3 DESIGN CRITERIA
-7) shows a typical downspout infiltration system, and Figure 5. 1 J.11 (p. 5-8)
Figure 5. LLA (p. 5
presents an alternative infiltration system for sites with coarse sand and cobble soils. These systems shall
be designed as specified below.
9/l/98
1998 Surface Water Design Manual
5.5
Z�
—4 -fi
SR in
C
M
0
O�
m fu
0 -n
n
-4
X
m In
0
0
C (a
= 0
In 0
Z
to
Z
0
1
0
SEC11ON5.1 ROOF DOWNSPOUT CONTROLS
General
't nimum lengths (linear feet) per 1,000
1. Downspout infiltration trenches shall be the following mi I
square feet of roof area based on soil type:
Coarse sands and cobbles: 20 LF
Medium sand* 30 LF
Fine sand, loamy sand 75 LF
Sandyloarn 125 LF
Loam 190 LF
2. Ma)dmum length of trench shall not exceed 100 feet from the inlet sump.
3. Minimum spacing between trench center lines shall be 6 feet.
4. Filter fabric shall be placed over the drain rock prior to backfilling.
th
5. Infiltration trenches may be placed in fill material if e fill is placed and compacted under the
rate is at least 8 inches per
supervision of a geotechnical engineer, and if the measured infiltration
hour. Trench length in fill shall be 60 linear feet per 1,000 square feet of roof area. Infiltration rates
shall be tested using the methods described in Section 5.4.1 (p. 5-53).
6. Infiltration trenches are not allowed on slopes steeper than 25% (4:1). A geotechnical analysis and
p slope or
report may be required on slopes over 15% or if located A#in 200 feet of the top of stee
landslide hazard area.
yard drain or catch basin with grate cover is
7. Trenches may be located under pavement if a small
placed at the end of the trench pipe such that overflow would occur out of the catch basin at an
ement, and in a location which can accornmodate the
elevation at least one foot below that of the pav
ti
overflow without creating a significant adverse impact per Core Requirement #1 (see See onl.2.1).
f system failure.
_bt"t��qLth��pjvTent �ubgT4!L. th�evenl of
Setbacks
or sensitive area (except steep
i. An trenches must be at least 5 feet from any structure, property line
slopes).
2. All trenches must be at least 50 feet from any sensitive area steep slope. This setback may be
reduced to 15 feet based on a geritechnical evaluation, but in no instances may it be less than the
buffer width.
3. For sites with septic systems, infiltration trenches must be downgradient of the drainfield. Ibis
requirement may be waived if site topography clearly prohibits subsurface flows from intersecting the
drainfield.
Documentation Requirements
1. The approved plans for single family subdivision projects must show infiltration trench details and
the approximate location and size of each proposed downspout infiltration system and septic system
(if applicable). Alternatively, details of representative lots may be provided to depict approximate
locations of downspout infiltration systems and septic systems (if applicable).
2. If the proposed project is a subdivision, the following note conditioning single family residential
recorded with the plat
building permits on compliance with the approved infiltration systems shall be
or short plat:
"Single fainily residences constructed on lots created by this subdivision must provide downspout
infiltration systems according to the details shown on the approved plans."
1998 Surface Water Design Manual
9/1/98
5-6
Z'L
C:
rn
M2
4:
0 -n
n
m m
0
0
C V)
M 0
Z r-
:q �,
M
Z
Z
ru
f
FINAL PROJECT APPROVAL FORM
TO:
DATE:
MEMO TO: PERMIT COORDINATOR, BUILDING DIVISION
FROM: FIRE DEPARTMENT DATE —
ENGINEERING DIVISION DATE LS1
PLANNING DIVISION DATE—
PROJECT —
SITE ADDRESS---'Ic�:
PERMIT #_U2QLa2,&�a_ADB#_____--PATE INSPECTED
DESCRIPTION OF WORK TO BE INSPECTED---e�;�..��
A field inspection was conducted to determine final compliance with approved plans. Final approval
denotes that there are no objections from the above signed Department to the release of
PERFORMANCE BQNDS and the granting of
---X-GRANT FINAL PROJECT APPROVAL
GRANT PROJECT APPROVAL WITH CONDITIONS NOTED
cl Copy of CONDITIONS given to owner/contractor by inspector
FAILED FINAL INSPECTION - OUTSTANDING ISSUES
u Copy of CORRECTION NOTICE given to owner/contractor by inspector
2.
3.
RE_INSpECTED OUTSTANDING ISSUES GRANT FINAL PROJECT APPROVAL
Date— Sign_
ocaprvl.doc.]:temp;bldg;fonnsIO/OI
z
0
:;9i
C M
MO
0
C
-4 M
= M
M Z
,0 --1
C
Cn
0 -n
M M
0
0
0 M
C 0)
C U)
M C)
Z
z
U)
z
M
FOUNDATION:
Footing
.......... I ..........
Wall ..........................
Pier/Porch
z
0
Retaining Wall ...........
0
ITI
Slab Insulation ..........
PLUMBING:
--I
3:
Underground
ME
M
C
M
Rough -In ............
Commercial Final
-j
ITI
HEATING:
Gas Test ............
? -d5
Gas Piping .................
on
Equipment
Commercial Final
3:
M ITI
EXTERIOR SHEATHING
IT
NAILING ..........................
C ('0
FRAMING .....................
FIRST FLOOR FRAMING
M C),
INSULATION .............
Floor Insulation
z
Wall Insulation ...........
CD
Ceiling Insulation
z
SHEETROCK NAILING
IT!
SPECIAL INSPECTION
MISCELLANEOUS ..........
FINAL APPROVAL FOR
OCCUPANCY . .............
Sidesewerfl-
AmoutPold RCCC,
$
Date
Water MeL-rSiz'e"_"
Amount Paid Receipt #_
DatePurchased
Mount Paid $_LjLt=jPt 2
T-'Z!e