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A PORTION OF THE S 1 /2 OF SECTION 1 & THE N 1 /2 OF SECTION 12, T 28 N, R 4 E, WM
<br /> SDMH 3 TYPE 2-54" � �
<br /> W/ SOLID LOCKING
<br /> 50 LF-18" � 0.50� COVER
<br /> & FLOW RESTRICTOR
<br /> EX. SDMH ASSEMBLY 18' SETBACK FROM 1� N O R-T- H
<br /> TOP 432.73 TOP 435.50 �� I � PROPERTY LINE TO »
<br /> IE 428.8 12" (E) IE 428.98 - 18�� (E) MAX WATER SURFACE 18 � SD OUTFALL � CONSTRUCTION NOTES: ,
<br /> IE 427.5 18" (N,S) IE 428.98 - 18 (SW) EX. SDMH 434.0 W/ ROCK HEADWALL & SPLASH PAD o 20 4o so
<br /> C.O.E STD DWGS 405, TOP 434.35 IE=430.00 (NW) z
<br /> 415, 416, & 611 IE 429.5 12" (SE,W) O SEE DETAIL SHEET C-10 FOR FLOW RESTRICTOR SCALE: 1"=40' Q Q
<br /> I E X. O V E R F L O W I N L E T 6 1 0 L F MANHOLE. CONNECT TO PROPOSED SDMH #4 ON � 7
<br /> �S _ _�p TOP 434.00 CL SF 18 SD EXISTING 18" STORM SEWER IN HARDESON ROAD. L
<br /> �� IE 429.9 12"PVC NW S=5.00% � �
<br /> I � � � O2 CONSTRUCT SDMH OVER EXISTING 18" STORM � � �
<br /> 2 SDMH 4 TYPE 2-48 o U o
<br /> W/ SOLID LOCKING COVER I (P CB 1 - TYPE 2 48"4 SEWER. RESTORE STREET PAVEMENT PER �-- J
<br /> � �
<br /> TOP 434.20 �So � W/ ROUND SOLID LOCKING COVER C.O.E. STD DWGS 326 & 614. p_ J �
<br /> � � �
<br /> IE 428.73 18" (N,S) � x �' - C.O.E. STD DWG 405 & 611 O 20 FOOT WIDE MAINTENANCE ACCESS DRIVE. .,
<br /> IE 428.73 18" (E) � x � 435 � X TOP=435.00 �
<br /> . C.O.E. STD DWGS 405 & 611 5 , � „ 435 I IE=430.50-18"(NW,SE) 4" CSBC OVER 12" RECYCLED CONCRETE. Q (Y� �
<br /> '•'� �'tF-18 SD U, CHANNEL BASE , BASIN DESIGN BASIS .
<br /> S=0.00% � � \ O INSTALL DOUBLE 20 WIDE CHAIN LINK SWING GATE � � C� j
<br /> 4 a ��'• , 430 ON ACCESS DRIVE. THIS INFILTRATION BASIN IS DESIGNED BASED ON AN INFILTRATION RATE C.� uJ
<br /> . " 42� �\ CONSTRUCT 20 FOOT CONCRETE DRIVEWAY TYPE 1 OF 1.5 INCHES PER HOUR FOR 29.8 ACRES OF TYPE C FORESTED z Q Z J
<br /> � ��::`:�.j.:. . 18 SD INTAKE (' , �P S=2$•79% O PER C.O.E. STD DWG 315. CONDITION CONVERTED TO 80� IMPERVIOUS AND 20� LANDSCAPING. 0 O W
<br /> 33' SETBACK FROM � . � � W/ ROCK HEADWALL �•� W PIPE ANCHORS PER Q O m
<br /> PROPERTY LINE TO � � & TRASH RACK �C w� O� : � DETAIL ON SHEET C-10 INSTALL CATCH BASIN TYPE 1 ON EXISTING 12" THE INFILTRATION BASIN WAS MODELED USING THE WESTERN � � M •
<br /> M A X W A T E R S U R F A C E I o x 3 IE=428.98 SB �� ��� �� O 6 W A S H I N G T O N H Y D R O L O G Y M O D E L (W W H M 2 0 1 2). O �
<br /> 434.0 3•,1 INFILTRATION ,C O „ STORM SEWER AS SECONDARY OVERFLOW. INSTALL z r,
<br /> o r\ Q` CB 15 - TYPE 2 48 � BEEHIVE GRATE PER DETAIL ON SHEET C-10. z M
<br /> N x BASIN (230' X 55') + +.� �� � ,,.- '' W/ ROUND SOLID LOCKING COVER � RIM ELEVATION j 434.00. � = X
<br /> 427 `- C.O.E. STD DWG 405 & 611 EXISTING IE (12 ) - 429.9 (NW) m � O Q
<br /> �,,-v� TOP=481.60 �� m
<br /> � DC � g \ 430 �,,, IE=469.86-18��(W) ] SDMH FOR CONNECTION BY LOT 2 AND FUTURE z � � 0
<br /> � IE=478.02-12 (SW) O DEVELOPMENT. FUTURE DEVELOPMENT TO PROVIDE O p.,
<br /> ex. 8»SS - - - � .
<br /> 435 � IE=469.36-18" NW,S) INDIVIDUAL WATFR QUALITY FACILITIES PRIOR TO �
<br /> .�.. , �E=4�s.o�-�2�°�NE) coNNECT�oN. STANDARD PRACTICE CODING SYSTEM Q z
<br /> 10 � � 440 ,
<br /> x 445 � ,,,, ,�'� g HYDROSEED ALL EXPOSED SOILS. PER LANDSCAPE CONTRACTOR TO INSTALL AND MAINTAIN ALL EROSION CONTROL BMP'S � �
<br /> U � .�� O PLANS. INSTALL EROSION CONTROL MAT, NORTH AS SHOWN ON THIS PLAN IN ACCORDANCE WITH DEPARTMENT OF J
<br /> � "`� 450 '� ��' ;��� AMERICAN GREEN SC150. ECOLOGY STORMWATER POLLUTION PREVENTION REQUIREMENTS � �
<br /> , ' �' z
<br /> 455 ��� ��� /� g INSTALL 6 FT HIGH PERIMETER CHAINLINK FENCE. SUMMARIZED ON SHEET C4. IF BMP INSTALLATION AND MAINTENANCE IS -
<br /> �___,_;___,S �.- � �� �,� ��- O INADEQUATE TO MEET TNESE REQUIREMENTS CONTRACTOR TO PROVIDE
<br /> 460 � �,, , �� • FUTURE LOT 3 �� FENCING TO BE INSTALLED BY CADMAN ADDITIONAL BMP'S AT NO ADDITIONAL COST TO OWNER. .��
<br /> � 465 r,,, , J'p�,-- �' �,' STORM DRAIN CODE BMPS -�
<br /> -
<br /> EX. SDMH � 47p �' � � ;� �� CONSTRUCT TWO PIPE ANCHORS PER DETAIL ON ''
<br /> � TOP 438.73 �P 475 �'""���1� '' , 'r ; SHEET C-10. '��' �
<br /> IE 433.6 18" N (� _ � ; i � CL CLEARING LIMITS & HIGH VISIBILITY FENCE (D.O.E. BMP C103) . �,'`'� 1�� r� �
<br /> I 480 i i � .�
<br /> Q 484 ''� � i I �; � .
<br /> Q x � DC DUST CONTROL (D.O.E. BMP C140) � � � �` �
<br /> � � � � � HARDESON INFILTRATION E3ASIN/SWPPP NOTES: '�
<br /> MU PS i i I 1. INFILTRATION BASIN TO BE USED AS TEMPORARY SEDIMENT POND. LOT 1 TO BE �* -�..,�� •
<br /> z x � i / � ,� STABILIZED PRIOR TO OVER-EXCAVATING POND AND PLACEMENT OF SAND LAYER. IDS INTERCEPTOR SWALE W/ ROCK CHECK DAM (D.O.E. BMP C200)
<br /> Q FENCING TO BE INSTALLED � �
<br /> (� BY UNDERWOOD GARTLAND I i i
<br /> i � � P 2. CONTRACTOR TO OVER-EXCAVATE A MINIMUM OF 5 FEET BELOW THE BASIN
<br /> W I � i � Q BOTTOM AND REPLACE WITH 5 FEET OF WASHED CEMEX SAND. THE POND IP CATCH BASIN/INLET SEDIMENT PROTECTION
<br /> Q x l � � � BOTTOM SHALL BE EVALUATED DURIf�IG CONSTRUCTION BY THE ENGINEER TO (WSDOT STD PLAN I-40.20-00 & D.O.E. BMP C220)
<br /> i
<br /> (� 1� o I i � � � DETERMINE IF ADDITIONAL EXCAVATION IS REQUIRED TO REMOVE ALL EXISTING
<br /> � I x � (� �- i i O FILL MATERIAL. MU MULCH (D.O.E. BMP C121)
<br /> = J `'� � I ' � � 3. PERMANENT SLOPES ADJACENT TO THE POND SHALL BE CUT INTO THE DENSE V o
<br /> O `^� ��/ Z N
<br /> � �,� G I NATIVE SOILS TO THE SOUTH AT 2H:1V FOR PERMANENT SLOPES AS SHOWN. ANY PS TEMPORARY & PERMANENT SEEDING (D.O.E. BMP C120) � N a? �
<br /> PERMANENT SLOPES THAT ARE CUT INTO EXISTING FILL THAT WAS NOT
<br /> `^�'^ � PREVIOUSLY COMPACTED TO ENGINEERED STANDARDS SHALL BE REMOVED, i� N �
<br /> �Y, \ I PREPARED AND COMPACTED IN ACCORDANCE WITH THE SLOPE RECONSTRUCTION Z W � � o
<br /> � DETAIL. S B S E D I M E N T B A S I N / T R A P (D.O.E. B M P C 2 4 1) Q E- .> � d;
<br /> Q' POND GRADING TO BE I � Q p` o �
<br /> � COORDINATED WITH MINING �' N
<br /> RECLAMATION GRADING W °� � N
<br /> � I SF TEMPORARY SILT FENCE (D.O.E. BMP C233) Q C� � �
<br /> � + I � O .� � �
<br /> � � � � �
<br /> a � � a� �
<br /> ID O0 Q � �j .
<br /> � N
<br /> aZ �
<br /> a �
<br /> 550 _ _ _ _ 55o EROSION CONTROL MONITORING PLAN
<br /> 0 �
<br /> � __ _ _ _ _ _ _ _ _ _ _ _ _
<br /> � _ . _ _ _. __ _ _ _ _ _ - _ __ _ _ - - - - - - -. -- - - - - - --- - - - - - - - 540 1. OBSERVE EROSION CONTROL MEASURES AT THE BEGINNING AND END
<br /> X 540 _ _ _ __ _- - _ _ OF EACH DAY. REPAIR AND OR REPLACE AS NECESSARY TO ASSURE
<br /> w _ _. � � _ _. .
<br /> o _ _ PROPER FUNCTION.
<br /> `�i 530 � _- 530 REVISIONS: APPD.
<br /> o _ _ / _ _ _ 2. OBSERVE COLLECTION FACILITIES DURING PERIODS OF HEAVY
<br /> o _ _ _ _
<br /> o _ _. / _ _ _ RAINFALL AND WET WEATHER CONDITIONS.
<br /> ' x _ _ _ ___ _ /_ _ _ . __ _ _ ___ _
<br /> ? 520 / 520 ,
<br /> , __ _ _ _ _ _ _
<br /> 3. OBSERVE AND MONITOR STABILIZATION TECHNIQUES. MAKE REPAIRS
<br /> m EXISIING GRADE �
<br /> - AND/OR ALTERATIONS AS NECESSARY TO PREVENT EROSION. :
<br /> �, _ _ _ _ _ _ _ _ _ _ _ i ___ _
<br /> g 510 _ 510
<br /> , i 4. OGY
<br /> c..� /
<br /> w / (D.O.E.)Y AND CITY OFSEVERE�TT (C.OTE.)DREQU REMENTOSF FOR L
<br /> � _. _ _ � _ _ _ __ _ _ _ DISCHARGE OF STORMWATER.
<br /> w 500 � POND GRADING TO BE 500
<br /> _
<br /> _ _ . _ _ � COORDINATED WITH MINING
<br /> cn _ __ _
<br /> �� RECLAMATION GRADING
<br /> w 490 _ _ __ _ _ _ 490 SWPPP BEST MANAGEMENT PRACTICES
<br /> o _ � _ _ _ _ _ _ __ _
<br /> a � PAD ELEV 484.0
<br /> - -- - 2 THE LOCATION AND TYPE OF PROPOSED MEASURES FOR TEMPORARY EROSION
<br /> o �� . AUGUST, 2017
<br /> � 480 � � 480 CONTROL SHALL BE AS FOLLOWS:
<br /> DATE�
<br /> o . JNM
<br /> M / _ DESIGN�
<br /> o _ _ _ _ __ __ _ _ : _ SEDIMENT BASIN - DETENTION POND TO BE UTILIZED AS DRAWN: CD .
<br /> TEMPORARY SEDIMENT BASIN CHECKED:
<br /> o _ _ _
<br /> � .
<br /> 0
<br /> 470
<br /> 470
<br /> o _ _. _ _ __ _ _ _. MULCH AND HYDROSEED -- ALL EXPOSED SOIL UPON ATTAINMENT OF FINISH �
<br /> o � REVISION
<br /> o GRADE NUMBER:
<br /> � _ __ _ / SILT FENCES - AT DOWNSLOPE SIDE OF AREAS TO BE CLEARED ,
<br /> � 460 _ 460 AND AT TOE OF FILL SLOPES
<br /> _
<br /> � �. SCALE .
<br /> �� w �
<br /> "� 45o z s' wi�E BERM _ � _ _ _ _ _ _ _ _ _ _ 45o WET WEATHER GRADING & SWPPP NOTE
<br /> �
<br /> �� } TOP=435.0
<br /> Z �, � PROJECT NUMBER:
<br /> � � FINISHED GRADE _ _ _ � _ _ : 1. FROM OCTOBER 1 TO APRIL 30 NO DENUDED SOIL AREAS AND SOIL STOCKPILES
<br /> �
<br /> �
<br /> m m 440 w � 2 440 MAY REMAW EXPOSED FOR MORE THAN 2 DAYS AND NO MOR UG DXO003
<br /> T�, � 434.0 / : : FROM MAY 1 TO SEPTEMBER 30. I � PF�RO���
<br /> mm �
<br /> 430 - - --- -' � 3 . � 430 $ L� / WING FILE: .
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<br /> SHEET NO.
<br /> 0 o BOTTOM .OF.JNFILTRATION; BASW. ..... 5 FT..DEPTH .. CEAN . � wa��t .
<br /> N N CALL ELEVATION = 427:0....... PIT SAND
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<br /> 2 B U S I N E S S DAYS 410 410 � �Quar�o vRaoa ro sraara�a�
<br /> �� A PU�LIC WOi2KS PERMiY E5
<br /> 0O CO BEFORE YOU DIG 0+00 1+00 2+00 3+00 3+70 , ��'��� - - -� �rar consr�urnor� or� -r►ias
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<br /> SECTIUN A-A: HARDESON INFILTRATION BASIN ��T�S
<br /> o �, 1-800-424-5555 1 = 20 HORIZONTAL & VERTICAL
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<br /> a� PERMIY FOR C0�5'TR!lGTS9A1 Nda
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