24951 208 DRAINAGE EASEMENTS i
CLC I _ -
Associates Inc.
FORM ERLY ; ~ucnbd ca~o L.na C~mW` rw.
to I March 15, 2000
CLC #99009
707 West 7th Suite 200 I ECF` V ED
Spokane, wA 99204 Spokane County Engineers R
509-458-6840 Engineering Development Services MAR 1 6 2000
509-458-6844 Fax 1026 W. Broadway Ave.
Spokane, wA - Denver, co Spokane, WA 99260-0170 ENGINEER
SPOKANE COUNN
i Attn: Bill Hemmings, P.E.
~
~
! Re: Riverwalk 8"' Addition (P1414G); Storm Drainage revisioo,
~ Pond F
I
I •
Dear Bill:
i Enclosed please find 2 copies of Sheets 2/5 and 5/5 for the above referenced
project. The drywell placement has changed from within the Hodges Lane
roadway to within Pond F as shown. Access to the pond has been provided per the
, Spokane County Road Standards. We request approval of the design change, and
'
~ have enclosed calculations for the minor pond volume changes in order to verify
' that the `208' requirement for the basin is still being satisfied by the changes
E
; requested.
i
; If you have any questions, please give me a call if you have any questions. Thank
you.
; Sincerely,
i CLC ASSOCIATES INC.
~
; Susan Murphy, Associate
' Proj ect Manager
i
Enc.
~ . cc: file, Shorewood Homes
~
i
;
C~ ~ ~
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Planning ' m, Ew 1X imis'
Engineering j
Architecture {
Landscape Architecture '
Land Surveying ,
Formerly IPE ;
C],C 707 West 7th Ave. Planning
Associates, Inc. Suite 200 Engineering
Spokane, WA 99204 Architecture
(509) 458-6840 Landscape Architecture
(509) 458-6844 FAX Land Surveying ,
A..MorcdC41m„~Cowd=mh~ -
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lltp • PA6f Of
and pipe flows, some of which are summarized below with the remaining calculations included
in the appendix. Within the calculation section and where it has been determined necessary for clarity, several
sketches, as well as details from the plans have been incorporated to demonstrate assumptions
and conclusions.
BASIN DESCRIPTIONS
~
Basins A through G
Within this plat, and due to the general geographic features, several basic assumptions were
followed and can be used to describe each basin. First, due to the relative flatness of the plat and
project vicinity, minimum road grade is limited to O.OOSft/ft; second, a large tract pond if
practical will be used in the open space area; third, all other ponds will be of the lot pond
configuration; fourth, that where practical, drywells will be minimized by combining basins and
providing piping between ponds.
All of these steps have been used in various basins throughout the drainage design of this project.
Table No. 2- Pond and 208 Basin Summary 'o : e 2U~~ LVA"o
. :
; -
A A 186 280 560 1- B
B B 156 187 375 1- A
C C 187 280 560 - 1- B D D 235 254 508 1- B
E E 136 170 340 1- A
r~evis~
F FG 734 q 3 (o 7~' 3' B** 1,51 CY6
G FG 559 341. 682
H C(RW6) 224 387 774 1- B
Type A is a Spokane Standard Drywell - Single Depth, Capacity 0.3 cfs - Type B is a Spokane Standard Drywell - Double Depth, Capacity 1.0 cfs
Basins F& G have been combined for the Bowstring Calculation.
Pond F is designed to provide `208' treatment to a depth of 8"; al I other `208' treatrnent areas are based on a
depth of 6" .
Inland Pacific Engineering Companry D4 Riverwalk 8th Addition Plat Drainage Repon
OFFICE OF THE COUNTY ENGINEER
SPOKANE COUNTY, WASHINGTON
TO: Jeff Forry, Department of Buildings
FROM: Bill Hemmings
DATE: Wednesday, February 17, 1999
SUBJECT: B.C.C resolution #91-0882 Implementation (July 2, 1991)
Attached are the individual lot plans for each lot containing a swale in RIVERWALK 8TH AllD, plat # PE-
1414G. Please give the appropriate lot plan to the individual applying for a building permit on the lot, so they
can draw their house and approach to scale on the lot. We will need this plan, and the corresponding
$1,000.00 cash surety, in the form of cash, letter of credit, or savings assignment, before we can issue the
approach permit. Also attached are the letter of credit and savings assignment forms.
"AGREEMENT" -
In consideration of the issuance of a building permit for Lot , Block ,
RIVER`vALK 8TH ADD (plat) plat # PE-1414G
(Developer)
has deposited $1,000.00 with Spokane County as security for full and faithful performance by Developer respecting certain drainage
facilities and sod in accordance with the drawings and specifications as submitted to and approved by the Spokane County Engineers
Office on
(date) 199 .
Developer hereby agrees that should such drainage facilities and sod not be constructed in accordance with the approved
drawing within six months of occupancy, Spokane County may then use the security to bring these facilities and sod into
conformance therewith. Developer shall be responsible for any costs incurred by the county in excess of the amount of security.
Spokane County agrees to return to Developer any unused funds upon satisfactory completion of these facilities and sod.
NAME & ADDRESS TO BE RETURNED TO:
(Developer Signature)
DATE
' "SAMPLE LETTER OF CREDIT"
"(USE BANK LETTERHEAD)" (BANK NAME
ADDRESS ZIP CODE
PHONE # AND OTHER INFORiv1ATION
IRREVOCABLE LETTER OF CREDIT
AMOLTNT: $ 1,000.00
NO.
BENEFICIARY:
SPOKANE COUNTY ENGINEERS
1026 W BROADWAY
SPOKANE, WA 99260-0170
SUBTECT: LOT BLOCK RIVERWALK 8TH ADD (Plat)
PLAT# PE-1414G. (Development)
Gentlemen:
We hereby authorize our irrevocable Letter of Credit in your favor, and authorize you to draw on the
(bank), a draft up to one thousand (Dollars) ($1,000.00) , for the account of
(developer).
The draft, drawn under this Letter of Credit, covers the assurance of completion of installation of storrn drainage, drainage
swales, sod and other work as is incidental and related thereto in accordance with the drawings and specifications as submitted to and
approved by the Spokane County Engineer's Office on (date), and is to be accompanied by the following
documents: written request by Spokane County Engineer's Office to (bank), at
the above address indicating non-completion of all or any of the above improvements and that amount of money required to complete
such improvements.
We hereby agree with the drawer, endorser and bona fide holder of this draft, negotiated under and in compliance with the terms
of this credit, that said draft shall be duly honored upon presentation at the (bank),
at any time before completion of the above-described improvements or performance, in which event written notice shall be given by
Spokane County to the bank. ' (developer) shall be responsible for any cost
incurred by the county in excess of the amount of security.
Drafts, drawn under this Letter of Credit, shall bear on their face the words
Drawn under (bank)
(bank address)
Credit No. Dated
Bank Name:
By:
(authorized signor)
ASSIGNMENT
For securiry purposes only, (developer)
hereby assigns to SPOKANE COLTNTY, a political subdivision of the State of Washington, the following:
Savings Certificate Number
in the face amount of $1,000.00
and held in and by '
Bank of
Branch
(bank address)
This assignment is made as security for full and faithful performance by
(developer) of certain drainage facilities and sod for LOT BLOCK , RIVERWALK 8TH ADD (Plat) Plat # PE-
1414G in accordance with the drawings: and specifications as submitted to and approved by the Spokane County Engineers office on
(date) , 199 .
Any interest benefits accruing under said savings certificate shall remain the property of
(developer). Said savings certificate to be released to (developer)
any other party only with the prior written consent and agreement of Spokane County.
PROVIDED, FURTHER, the undersigned does bereby authorize
(bank) to pay over to Spokane County all or a sufficient portion of the monies in the savings certificate referenced hereinabove upon
written documentation being received from the Spokane County Engineer indicating that the purposes for which the savings
certificate was assigned have not been fully and faithfully performed as required and a statement of that amount of money which the
County Engineer as required and a statement of that amount of money which the County Engineer deems necessary to complete such
obligation. Upon receipt of such written documentarion, (developer)
hereby authorizes (bank) to release to Spokane County that
amount of money requested up to the maximum amount in the savings certificate.
(developer) shall be responsible for any costs incurred by the county excess of the amount of security.
. •
DATED this day of 1194
BANK OF
Precirlant -
I
i - -
TYPE "R" CURB
PROPOSED DRAINAGE r '
EASEMENT
TYPE "A" DRYWELL WITH TYPE "3"~ :
METAL FRAME AND GRATE PER •
SPOKANE COUNTY STANDARD ;
PLAN B-1a AND B-15 •
STA. 10+59, 24.5' RT.
GRATE EL.=2027.91 ~ . y
` 28.31' ' •
5' CURB INLET TYPE "1" •\s1.88'
STA. 10+52.92 RT.
T.C.=2028.64 ~ h
15'/20' B.S.
o
BOUNDARY OF LEVEL
~
FLAT BOTTOM AREA
~ POND "E" . ~ ~
Z
Q
~ O OF AS V) . . ,
, ,
W ~ .
0 #1» , ;
TYPE B CURB•: , ~-10 ..,UTILITY EASEMENT
25462 INDIANA AVENUE „
O
S~4NAl. .
~ EXPIRES 9/24/
\SCALE: 1"=20' POND BOTTOM ELEV.=2027.21
BERM ELEV.=2028.85 J
t
I NLAND ~
LOT 1, BLOCK 1 PACIFIC
RIVERWALK 8TH ADDITION ENQINEERINQ
707 Weat 7th • SuRe 200 (509) 458-6840
` DATE: 5/22/97 ~~SPoka^a WA 99204 FN(; (509) 458-8844~
~ . - - , ~
NOTE: -
ORGANIC CARBON TESTING IS REQUIRED FOR THE TOPSOIL IF THE DRYWELL GRATE IS GREATER THAN 0.5' ABOVE SOD
FLOWLINE @ ,
TOP OF BERM ELEV. = EASEMENT CURB INLET
TOP OF CURB ELEV. . OR R.O.W. ~
+ .20 FT. , -TYPE "R" CURB
DRAINAGE EASEMENT AS SPECIFIED ON PLAN .
. 3:1 TYP. _ , , . .
~ NORMAL GUTTER LINE
.4' 3:1 (Tl'P) ~
, GRATE ELEVATION ' ` ~ y .
' ~i, .
RAINAGE ; .5'-.67' ' -n= •
~ Mq , . ~r. a CONCRETE=APRON
STRU~TURE x
3 k" 4" THICK ''P,C.C,,
/ 1" TOPSOIL ON , - , r k '
NOTE. GRADED POND BOTTOM . 3
.
PROVIDE FILTER FABRIC (AMOCO 4545 OR EQUAL) BETWEEN GRADED POND BOTTOM
, y • ' r
THE NATIVE SOIL AND THE WASHED DRAIN ROCK AND BETWEEN 1.11'-1.28' BELOW
.
THE WASHED DRAIN ROCK AND THE DRYWELL BARREL. EDGE OF ASPHALT .5" SOD ON TOPSOIL, SOD
. INSTALLED CONCURRENT WITH
OCCUPANCY OF ADJACENT HOUSE • - y; W f~
oQ o s
SECTIONAL VIEW
TYP CAL '208' POND W TH DRA NAGE STRUCTURE _
NOT TO SCALE 25462
FCrsrE
. s~oNaL ~
EXPIRES 9/24/QV' ~
` l.... . - ~
/00 I NLAND \
RIVERWALK 8TH ADDITION PACIFIC ,
ENGINEERING
707 west 7tn • S,he soo (509) 458-6840
~ DATE: 5/22/97 /~Spokana WA 99204 FAX: (509) 458-6844/
2
1
PROPOSED DRAINAGE ~
EASEMENT , ~ - 30' ;n
BOUNDARY OF LEVEL
FLAT BOTTOM AREA 5*
cV
CONCRETE INLET TYPE .B.s.
WITH TYPE "2" METAL FRAME ' ' .
AND GRATE PER SPOKANE
COUNTY STANDARD B-~6 AND POND A
8-13, STA. 18+09, 30 LT., . 40.88,
GRATE EL.=2026.11
_ - _ - -
_ ~ - , - -
CURB INLET TYPE "2" ~ » n ~
STA. 18+20.20 RT. TYPE R CURB ~16' SIDEWALK &
T.C.=2026.84 UTILITY EASEMENT
. 18 FLAT ROCK RIVER LANE
,
,
54 L.F. OF 12" C.M.P.
S=0.0185, I.E.(N)=2023.11,
I.E.(S)=2022.11
. ~ M
yy ,y
. O pE A SH .o
. - : _ o ~
1~ y 3 O
• ~ i~. M~
25462
- Fss~~~stE ~~C,~
~ NAI.
~
SCALE: 1"-20' POND BOTTOM ELEV.=2025.40 EXPIRES 9/24fft 1
` BERM ELEV.=2027.04 J
I NLAND \
LOT 1, BLOCK 2 PACiFic
R I VE R WA LK 8 TH A D D I TI 0 N ENGINEERINQ
707 West 7th • Suite 200 (509) 458-6840
j
~ DATE: 5/22/97 J~ SPokane. WA 99204 FAX: (509) 458-6844
\
NOTE: ORGANIC CARBON TESTING IS. REQUIRED FOR THE TOPSOIL 'IF THE DRYWELL GRATE IS GREATER THAN 0.5' ABOVE SOD
<-FLOWLINE 0 .
TOP OF BERM ELEV. EASEMENTCURB INLET ,
TOP OF CURB ELEV. . OR R.O.W. ~
+ .20 FT. TYPE "R" CURB
DRAINAGE EASEMENT AS SPECIFIED ON PLAN ,
3:1 TYP.
~ NORMAL GUTTER LINE •'GRATE ELEVATION .4' 3:1 (TYP)
t . , • .
~ -t. t::~'~;;,; - • , .
RAINAGE 3:
,1 Mqx CONCRE~TE APRON~" '
STRU~TURE ~ .
4" THICK'..P.C.C.-
/ 1" TQPSOIL ON ' NOTE: . GRADED POND BOTTOM
PROVIDE FILTER FABRIC (AMOCO 4545 OR EQUAL) BETWEEN GRADED POND BOTTOM
.
THE NATIVE SOIL AND THE WASHED DRAIN ROCK AND BETWEEN 1•11 -1•28 BELOW :
THE WASHED DRAIN ROCK AND THE DRYWELL BARREL. EDGE OF ASPHALT 1.5" SOD ON TOPSOIL, SOD
. INSTALLED CONCURRENT WITH
. OCCUPANCY OF ADJACENT HOUSE W N
. ' OQ o s
SECTIONAL VIEW
TYP C AL 208POND W TH DRA NAGE STRUCTURE Z
NOT TO SCALE 25462 ~v
, S+ f ~1 SYER~~
. . ` NAI
EXPIRES 9/24/ OV ~
~
INLAND
imc PACiFic ,
-RIVERWALK 8TH ADDITION
ENGINEERING
707 West 7th • Suite 200 (509) 458-6840
\DATE: 5/22/97 J~ Spokana WA 99204 FAX: (509) 458-6844/
. _
16' SIDEWALK &
UTILITY EASEMENI
TYPE CURB
N ^
. - f
6 ~PROPOSED DRAINAGE • -
EASEMENT ;
BOUNDARY OF LEVEL ;
FLAT BOTTOM AREA • - : w
• Z
CONCRETE INLET TYPE "1" WITN ; J
TYPE 2 METAL FRAME AND . ~
GRATE PER SPOKANE COUNTY • ' V)
STANDARD B-5 AND B-13, 36.80' - ~
STA. 22+05.54, 27.50 LT., 5' 4' - ~
GRATE EL. = 2026.35 ~ p
16' SIDEWALK & 15'/20' B.S. ~ _
. ~
UTILITYEASEMENT M .
POND »6»
2:
47.21'
. ^
TYPE „R„ CURB
Cl?RB INLET TYPE "2"- CURB INLEI_T-'E, "2"
STA.~22+14.29 LT., ST A~ t3+20 LT.,
T.C.=2027.08 -T.C.=2027.11
. ~
50 L.F. oF 12" - C.M.P. F'LAT ROCK RI VER LAN E . d A
S=0.0300;.~I:E:('N)=~2023:35;
~ I.E.(S)=2021.85'
, . . ? ~
~0, ,pF 25462
, /SSE
4NAL
. ~
SCALE: 1"=20' POND BOTTOM ELEV.=2025.67 EXPIRES 9/24/ ~
` BERM ELEV.=2027.13 J
I NLAND \
LOT 6, BLOCK 2 PACiFic
R I VER WALK 8TH AD D I TI ON ENQINEERINC
707 rvest 7th • suite 200 (sos) 458-6840
` DATE: 5/22/97 SPokane. WA 99204 FAx: (509) 458-68"j
~ . . . ~
NOTE:
ORGANIC CARBON TESTING IS, REQUIREO FOR THE TOPSOIL IF THE DRYWELL GRATE IS GREATER TNAN 0.5' ABOVE SOD
. , , . ~ --FLOWLINE 0 .
TOP OF BERM ELEV. = EASEMENT CURB INLET
TOP OF CURB ELEV. OR R.O.W.
~ +,20FT. „n
DRAINAGE EASEMENT AS SPECIFIED ON PLAN -TYPE R CURB
~ .
3:1 Tl'P. ~ - . ~ . ~ NORMAL GUTTER LINE .f ''"l*~'
.4' 3:1 (TYP) . . ~ : ,
. GRATE ELEVATION _ , .
RAINAGE 3; , -
1
STRU~TURE CONCRETE;aAPRON
~4" THICK :C.C: .
/ 1" TOPSOIL ON ' ..NOTE: . GRADED POND BOTTOM
PROVIDE FILTER FABRIC (AMOCO 4545 OR EQUAL) BETWEEN GRADED POND BOTTOM
.
THE NAl1VE SOIL AND THE WASHED DRAIN ROCK AND BETWEEN 1.1l'-1•28' BELOW
THE WASHED DRAIN ROCK AND THE DRYWELL BARREL EDGE OF ASPHALT
1.5" SOD ON TOPSOIL, SOD INSTALLED CONCURRENT WITH
, OCCUPANCY OF ADJACENT HOUSE
SECTIONAL VIEW
TYP CAL '208' POND W TH DRA NAGE STRUCTURE _
PC
NOT TO SCALE
qf 25462
. F~seoi STf
. . NAL
EXPIRES 9/24/0 1
7I ~
NLAND
imc PACiFic ,
WA H ADDITION
RIVER LK 8T ENGINEERING
707 West 7th 9 S1uIte 200 (509) 458-6840
`DATE: 5/22/97 J~Spokane, WA 99204 FAX: (509) 458-684 J
FLAT ROCK RIVER LANE
,
,
54 L.F. OF 12" C.M.P. CURB INLET TYPE "1" TYPE "R" CURB
S=0.0185, I.E.(N)=2023.11, STA. 18+20.20 RT. ,10' UTILITY
I.E.(S)=2022.11 T.C.=2026.84
EASEMENT
. ,
5' POND »Ci,
TYPE „ „ „3
B DRYWELL WITH TYPE
METAL FRAME AND GRATE PER
SPOKANE COUNTY STANDARD
PLAN B-1a AND B-15, STA. 15'/20' B.S.
18+05.00, 23.50' RT., . . . . . . . . . . . . . . . . . . . . . . .
GRATE EL.=2026.11 s'
42.59'
BOUNDARY OF LEVEL
FLAT BOTTOM AREA 30' ~PROPOSED DRAINAGE ~ i
EASEMENT
3
1
R W H~ t. . . . - . :
. ; . • . - ,
~ 7- ,
9F 25462 ~p
~ss/0
NAL
i EXPIRES 9/24/of
SCALE: 1"=20' POND BOTTOM ELEV.=2025.40
` BERM ELEV.=2027.04 J
i~=~ I NLAND \
LOT 1, BLOCK 3 PACiFic
RIVERWALK 8TH ADDITION ENC3INEERING
707 West 7th • Suite 200 (509) 458-6840
` DATE: 5/22/97 J`Spokana, WA 99204 FAx (509) 458-6844J
~ . . ~
NOTE: .
ORGANIC CARBON TESTING IS REQUIRED FOR THE TOPSOIL IF THE DRYWELL GRATE IS GREATER THAN 0.5' ABOVE SOD . , , . --FLOWLINE 0 ,
TOP OF BERM ELEV. = EASEMENT CURB iNLET
TOP OF CURB ELEV. . OR R.O.W. C + .20 FT. -TYPE "R" CURB
DRAINAGE EASEMENT AS SPECIFIED ON PLAN
3:1 TYP.
~ NORMAL GUTTER LINE
, GRATE ELEVATION .4' 3:1 (TYP) , "•`:y}~~ :~:s .
. ~ :
~ _
RAINAGE 3:1 MAx ~.,.q~.....,M, .,,a CONCRE~TE, APRON
STRU~TURE 4 THICK P,C.C.~j ~ .
/ 1" TOPSOIL ON
NOTE: GRADED POND BOTTOM
PROVIDE FILTER FABRIC (AMOCO 4545 OR EQUAL) BETWEEN GRADED POND BOTTOM THE NA11VE SOIL AND TNE WASHED DRAIN ROCK AND BETWEEN 1•11'-1.28' BELOW ►aj
THE WASHED DRAIN ROCK AND THE DRYWELL BARREL. EDGE OF ASPHALT . ,
11.5" SOD ON TOPSOIL, SOD.
. INSTALLED CONCURRENT WITH OCCUPANCY OF ADJACENT HQUSE W JY
. • . ,
,A5
SECTI ON AL VI EW
TYP CAL 208' POND W TH DRA NAGE STRUCTURE
NOT TO SCALE ~
25462
, . , t~s'sOl SSE
. . NAI.
EXPIRES 9/24/ ~ ~
~
I Z I NLAND
DDITION PACiFic ,
RIVERWALK 8TH A ENGINEERING
707 Weat 7th • Sulte 200 (509) 458-8840
DATE: 5/22/97 J~ Spolcane, WA 99204 FAX: (509) 458-6844~
• '
50 L.F. OF 12" C.M.P. ~
. S=0.0300, I.E.(N)=2023.35, r i I.E.(S)=2021.85 TYPE "6" DRYWELL WITH TYPE "3" -n
METAL FRAME AND GRATE PER `
'Sfl,,OKANE COUNTY STANDARD ' f
PLAAj B-1 a AND B-15, STA.
22+64,00, 23.50' RT.,
GRATE EL.=2026.25~FL~AT 2 T ROCK RIVER LANE
TYPE "R" CURB CURB INLET TYPE "1" W
10' UTILITY - STA. 22+15.00 LT. ZQ EASEMENT T.C.=2027.08 J
V)
W
0
POND 'fDf' r. o
_
~
0
M
15'/20' B.S. N ' CURB INLET TYPE "2"
. . . . . . . . . . . . . . . . . .5; . STA. 12+37.19 LT.
3'
35.12' . • ~1 T.C.=2026.98
~ _ ~ - _
45.03.
- -
- - - _
. ~
. ' -BOUNDARY OF LEVEL
• ~ FLAT BOTTOM AREA
•
' ~PROPOSED DRAINAGE
~ - EASEMENT
• N__
16' SIDEWALK &
6 o m~ - UTILITY EASEMENT
00 a _
,-TYPE "R" CURB
. ' `i• , i:. - . ° • _ _ ^ ~
~ . • wd(~y~
~ ~e f • ,I O ` •`J
O
• . a_ _ _ . . = I1I
p ;
~ 5462
F F S t E~'
ss~4NAL
~
~ POND BOTTOM ELEV.=2025.50 EXPIRES 9/24~ ~
` SCALE: 1-20 BERM ELEV.=2027.14 J
\
I NLAND \
LOT 6, BLOCK 3 PACiFic
R I VE R WA LK 8 TH A D D I TI O N ENCiINEERING
707 West 7th • Suite 200 (509) 458-6840
~ D A TE: 5/2 2/9 7 ~\SPokana WA 99204 FAx: (509) 458-6844/
~ . l
NOTE:
ORGANIC CARBON TESTING IS. REQUIRED FOR THE TOPSOIL IF THE DRYWELL GRATE IS GREATER THAN 0.5' ABOVE SOD
. , r-FLOWLINE @ , TOP OF BERM ELEV. = EASEMENT CURB INLET
TOP OF CURB ELEV. . OR R.O.W.
+ .20 FT. -TYPE "R" CURB
DRAINAGE EASEMENT AS SPECIFIED ON PLAN
3:1 TYP. ' .
~ NORMAL GUTTER LINE ••~y'°~,
GRATE ELEVATIQN .4' 3; 1 (TYP)
t , ' ••e'• . .
.5'-.67' , ~,,;u.;,•.• .
RAINAGE 3.
TURE 1 MAx CONCRETE APRON
STRU~ 4" THICK P:C.C. ;
/ 1" TOPSOIL ON : NOTE: , GRADED POND BOTTOM PROViDE FILTER FABRIC (AMOCO 4545 OR EQUAL) BETWEEN GRADED POND BOTTOM .
THE NATIVE SOIL AND THE WASHED DRAIN ROCK AND BETWEEN 1•11'-1.28' BELOW
THE WASHED DRAIN ROCK AND THE DRYWELL BARREL. EDGE OF ASPHALT o. •
1.5" SOD ON TOPSOIL, SOD . INSTALLED CONCURRENT WITH ,
. OCCUPANCY OF ADJACENT HOUSE W f~
, O'Zi ~ S
SECTIONAL VIEW
TYP C 'AL 208P.OND W TH DRA NAGE STRUCTURE _
NOT TO SCALE 25462
FciStE
NAL ~
EXPIRES 9/24/ 0 ~
.INLAND
. RIVERWALK 8TH ADDITION PACIFIC
ENGINEERING
707 West 7th ~ Sulte 200 (309) 458-8840
DATE: 5/22/97 SPokane, WA 99204 FAX: (509) 458-6844/