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A PORTION OF THE NW 1/4, SECTION 12, T 28 N, R 4 E, WM
<br /> E'. SDA1H 4D /
<br /> TOP 432-3
<br /> IE 4298 Iz' (L) E< SDrvlH CONSTRUCTION NOTES:
<br /> L1
<br /> IE 427.E 19" (N,S) TOP 434.35
<br /> _
<br /> I % _/ IL 429.5 12" (SLIS) Oj SEE DETAIL SHEET SP-6 FOR FLOW RESTRICTOR
<br /> I EX. OVERFL091INLET/� MANHOLE.CONNECT TO PROPOSED SDMH#4 ON NJ 0 F2-1-1-1
<br /> . I j iTOP 435.52 Y EXISTING 18"STORM SEWER IN HARDESON ROAD. C7
<br /> 1 • ( O 2 CONSTRUCT SDMH OVER EXISTING 18"STORM
<br /> iII I IE 429.9 12"P3G NY'! ��
<br /> I I 1 -•- SEWER.RESTORE STREET PAVEMENT PER 0 20 40 60 Q —
<br /> 1V 1\ 1 -._____________--.-_i- ` 0 L C.O.E. STD DWGS 316&610. a Q
<br /> , .
<br /> ©N �_ ,.may'a O3 20 FOOT WIDE MAINTENANCE ACCESS DRIVE. ( I
<br /> - Ni-----
<br /> �� ._ \\1 4"CS8C OVER 12"RECYCLED CONCRETE. Z
<br /> I SIG � 'W `� -�,���j�� ------- O¢ INSTALL DOUBLE 20'WIDE CHAIN LINK SWING GATE BASIN DESIGN BASIS z W_ W
<br /> THIS INFILTRATION BASIN IS DESIGNED BASED ON AN INFlLTRAWON RATE
<br /> i �_-1 0 _ I�� L -S-"�.�� ON ACCESS DRIVE. �' Z
<br /> ! 427 �� �.:�i� OF 1.5 INCHES PER HOUR FOR 29.8 ACRES OF TYPE C FORESTED Ur
<br /> :10;2/
<br /> ) a�•a� - 5 CONSTRUCT 20 FOOT CONCRETE DRIVEWAY TYPE 1 =
<br /> /' \ �i _ OPER C.O.E.STD DWG 307. CONDITION CONVERTED TO 807L IMPERVIOUS AND 20x LANDSCAPING. X
<br /> ..
<br /> �r� =a-��\�•` \,- 6 WASHNGTON HYDROLOGY MODEL MAMIM2012THE INFILTRATION BASIN WAS MODELED G THE WESTERN zzw\�__ -�`ar�� OINSTALL CATCH BASIN TYPE A ON EXISTING 12" QW �j\ � i%.�y �R-r�`A�I ` STORM SEWER AS SECONDARY OVERFLOW. INSTALL m F.- UUN �i - _ �' J/ •.l r�47-11 X171111 1 _-_ BEEHIVE GRATE PER DETAIL ON SHEET SP-6.
<br /> � �1GiF1�.�� • -- RIM ELEVATION=434.50. Z z
<br /> /iIIhIL r, ' r,- x`427'-I. —il7l. /// `. / " ► '�t �- �T,�i-r\ -��-- EXISTING IE(12)=429.9(NW) Q /^
<br /> 1 Litijix
<br /> 11 [!!!�����/////////////// �� -- _ Z �'Se� _�' ] SDMH FOR CONNECTION BY LOT 2 AND FUTURE Q V/
<br /> © 140141t., :-. j >� `�,�-.4�: DEVELOPMENT. FU RE DEVELOPMENT TO OR TO
<br /> � -�43-:5---
<br /> 35- _- Or4lit
<br /> �' ��_ �,� INDIVIDUAL WATER QUALITY FACILITIES PRIOR TOEH1 /���P I AI_11Mlall _CC 41Ssl , � 0Ateir,_ A.ice -
<br /> CONNECTION. G Z
<br /> I1 �ly�� �� - Rte= •'!„... -a, \..i�� •-G♦ �•� �.i,' - '^
<br /> I I �'�•��N��� ��y i�'>d i a ��� i����= `00%, %.f., — $ HYDROSEED ALL EXPOSED SOILS.FINAL LANDSCAPING (/)
<br /> t�'�,. .. ,..0.........4.-q�DY y{s�_a�� > fie' ►l��� • Q, •S _ O Z
<br /> 1 hip,-t�.�.. .���G =a c -�as� ���o t �I� PLAN TO BE SUBMITTED WITH FUTURE SITE -
<br /> / °T------ 7r ��" �� p.-- y 9 *- ��i' agif
<br /> �� --- DEVELOPMENT PLANS.
<br /> CO
<br /> �" ' II '..y7y, . 7.���i ;G��• �/.=.L== ,�ar� :,,..:�...�' ._i---= O INSTALL 6 FT HIGH PERIMETER CHAINLINK FENCE.
<br /> ' Ogli •A �aI _..ai I�ifiark��ttraliGi ..•>•.-.- i i i'�// _ INSTALL EROSIONCONTROL MAT,NORTH AMERICAN
<br /> ,�3 moi- ry'� i 1/'� r•v- ��++LL L �r-a ��D•� �� I_ �,. 10
<br /> D. SUIn-1 -.'/111_r7►eai . liafril nenal.GaSlitaiTt 101:41 /- GREEN SC150
<br /> �l V qvY ^/- .470 r•a��.o- �� Ia' 1 IIV WI� ���i: 'l - --�
<br /> TOP 439.73 I I a'' �7G4�� aMI,dij�G•�1��y����.j�`6�ra4 '��,� II OVER EXCAVATION AND PLACEMENT OF SAND NOT IN
<br /> It 433.ti 19" j I i i1I ffielYA al IU 11r ergiVE FISS,LSIP2i I��0i�� �-_ CONTRACTI ! tII�a-.�s:l 4.84'
<br /> e4 liee_rd�Jl�����,11�–..a�:�L `?r' _ 'f .� .
<br /> 1
<br /> i 7//././2:-
<br /> .--'
<br /> \� N.'-'-, u �� � HARDESON INFILTRATION BASIN NOTES: o _
<br /> 1 '
<br /> I /�� � 1. CONTRACTOR TO OVER-E%CAVATE A MINIMUM OF 5 FEET BELOW THE BASIN ''"�
<br /> /1 III / // p \`� ___ BOTTOM AND REPLACE WITH 5 FEET OF WASHED CEME%SAND. THE POND Z'• ry
<br /> 414.
<br /> II /tVrif-'
<br /> I I 1 BOTTOM SHALL 8E EVALUATED DURING CONSTRUCTION BY THE ENGINEER TO
<br /> A i / / i I / )\] ! � \ Gj DETERMINE IF ADDITIONS EXCAVATION IS REQUIRED TO REMOVE ALLEXISTING FILL '`
<br /> I I • i��` �� OD� MATERIAL. _��,�
<br /> % j / � 1 0 �� PG
<br /> / I , ,
<br /> I l %. O
<br /> I,I� /
<br /> �� ' '
<br /> j� + V ! �<0(.0
<br /> �') 2. A PILOT INFILTRATION TEST(PIT)IS TO BE CONDUCTED BEFORE CONSTRUCTION
<br /> I ITO DETERMINE THE DESIGN LONG TERM INFILTRATION RATE. CONTRACTOR TO
<br /> i� I I r C_ I' 1 �� \�C�RD' COORDINATE WITH ENGINEER TO PERFORM PIT TEST.
<br /> �q I V� o
<br /> a t�l /./1/,'/ /Il /fl z
<br /> 1Gh I / I / / 3. PERMANENT SLOPES ADJACENT TO THE POND SHALL BE CUT INTO THE DENSE m
<br /> I Dc I NATIVE SOILS TO THE SOUTH AT 2H:1V FOR PERMANENT SLOPES AS SHOWN.ANY W '-o
<br /> 8 I I I I / / I 1 I 1/ PERMANENT SLOPES THAT ARE CUT INTO EXISTING FILL THAT WAS NOT Z W N
<br /> '� 1 �\ ; / i O;; POND GRADING TO BE / / aim o
<br /> / / COORDINATED WITH MINING PREVIOUSLY COMPACTED TO ENGINEERED STANDARDS SHALL BE REMOVED, 4 l- c <.
<br /> I �, I' PREPARED AND COMPACTED IN ACCORDANCE WITH THE SLOPE RECONSTRUCTION 4 p
<br /> /i RECLAMATION GRADING
<br /> i I
<br /> r� l'K -��� �� r� DETAIL. W O1
<br /> 1 I' I 1 I Ili -.n
<br /> t;:.
<br /> I �'' ' 'I�i �Jl'i /l� l M \ / / : l °�w /, ��i I III _ Av A / Qp1oe�
<br /> 4D itC:11= 3 W
<br /> O o
<br /> N
<br /> E
<br /> 7
<br /> 1 550 550 0 540 ___. _..._ _.._. _.__ __-_-
<br /> .. .. ....... - _�--. 540
<br /> 530- .___. ____. ___. ____. __-_ __-rte -_. 530 REVISIONS: APPD.
<br /> /
<br /> /
<br /> yi 520 1 _- / ----...----- -----520
<br /> EXISTING GRADE. //
<br /> q510- _..... ____. ____. ____. __..._ --__. __.
<br /> Ii 500- ------.-_.____....._...._....._...__..._.....................__......_...__..:..._..._..----,,i • -----..._._.-POND GRADING TO BE ..._._....--- --- --..._.__500
<br /> i' COORDINATED WITH MINING
<br /> RECLAMATION GRADING
<br /> 490- ----- ---- -_.. ___. _._. • ....... _...... moi._.
<br /> •
<br /> PAD ELEV=484.0
<br /> DATE: APRIL,2017
<br /> 480- - -- --480 DESIGN: MI/ DRAWN: CLX
<br /> § 470 _..._--_-.- / - _-__-_-- _.-_ _--_.—470 CHECKED: &IS
<br /> S / REVISION
<br /> w / NUMBER:
<br /> g460- .___ _....... __.. _.._. __- ____. / ___ ..._..... ___. _._ ___ __.. .___ _._ _...._. _.....-460
<br /> 9 / SCALE:1'-40'
<br /> & w
<br /> Mil.
<br /> 1 6' WIDE BERM /
<br /> 450- --.-.--- -�� 450
<br /> �LL TOP-435.0 /-
<br /> FINISHED GRADE 7 •
<br /> cid 440- ____ "'13_ _.. - 2 ___. ____ __.. ___ .__. ___ __... ___ ___ ...._. PROJECT NUMBER:
<br /> mm a 434.0 //. . Tr -440 CEMX00000005
<br /> DRAWING FILE:
<br /> _- -- \.l EC-006-IB
<br /> 430- ___ 1 __._.. _. _ --Ti C,% ____ _... __. --__ ____ ____ __. _._ _...-. -__._ 430
<br /> as _J. - - _ - - - -
<br /> e420- ........ ._....-.. - ._...._.. .:..---- ---- ---- --- --- :.---._.-. _....._ ...._-- --__.------ --420 SHEET NO
<br /> •
<br /> BOTTOM OF INFILTRATION BASIN 5 FT DEPTH CLEAN S
<br /> g ELEVATION 427.0 PIT SAND ^1
<br /> 410 r I I I I 1� i I I I I I I I 410 J `Y1/
<br /> 0+00 1+00 2+00 3+00 3+70
<br /> om SECTION A-A: HARDESON INFILTRATION BASIN OF 9
<br /> s1" = 20'HORIZONTAL&VERTICAL
<br />
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