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A PORTION OF THE NW 1/4 OF THE SW 1/4 AND A PORTION OF THE SW 1/4 OF THE NW 1/4 OF SECTION 12, TOWNSHIP 28 NORTH, RANGE 4 EAST, W.M. - SNOHOMISH COUNTY, WASHINGTON
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<br /> `� / , ! � � � � EXT CB-3 -- - _ _-' • -�, � �
<br /> �' i I � �" � � `� O� � ' � o � � W� FLOW SPLITTER PER LEGEND �
<br /> i, �' � � q •. DETAIL 5, SHEET C-2.4
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<br /> ,�� � � I � � � � "'' ��� �` ����`/ � N: 3338.41 �� STORM DRAIN PIPE
<br /> � �, ` - -% � ' ,;�� ,�,� GABION BASKET ENERGY
<br /> � `' � , ,� ; , E 937 02 ❑ YARD�AREA DRAIN
<br /> � ` ` � i � , f.r��,� �, �'` ,� '�� � � R�M =�506.8A , -
<br /> DISSIPATION AT OUTFALL � �
<br /> +. 12 IE 501.70 NW SEE DETAIL 8 SHEET C 2.4 • STORM DRAIN CLEANOUT
<br /> � ., ,: � `�I !� a' r'� ■ CATCH BASIN, C.O.E TYPE A/B
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<br /> �` � �ry� � 0 Q� CATCH BASIN, TYPE 2 m
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<br /> � � ' ' ;X '`� ` � v� g' � STORM DRAIN CULVERT �'
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<br /> � `.,, � � � � � � 1 �, y, .. � � � %� ,�"' i � � CB-3A
<br /> � -- � � '' � W� BEEHIVE GRATE PER
<br /> � � � �� 'i;� ' / � DETAIL 7, SHEET C-2.4
<br /> `' N: 3389.45
<br /> � = 15 OS 27" E: 845.00 221 LF 15" �
<br /> R = 78�2.27 / RIM = 493.68 � � 20.33%
<br /> L = 20Ei. 72' `�' 12" IE 491.68 SE 493.57 -, �
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<br /> ����_-�a�� � ,y INLET TO POND
<br /> � � � ���`� L F, ..=,au �, .. �'� � � N: 3321.94 � �' � � g o
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<br /> /�` ' ��, \ � ' ' „ ` 15 IE 89.009S 49 .13 0 °� �
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<br /> `� O PROPOSED WETLAND - � ','�' •' � �
<br /> 4' A. f CREATION AREA � `<
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<br /> O� / SEE MITIGATION PLAN BY :' � ' � � �
<br /> r�` � /� WETLAND RESOURCES �'`' ' � �
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<br /> O� BEGIN ROAD A � (TYP) '`.�• � t� Z a �
<br /> ::. r 492.79 � � � ? � �
<br /> STA.=10+00 / z �
<br /> �- � GRASS CHANNEL BOTTOM '��� �
<br /> � �� ' � - WIDTH VARIES 6' TO 40' �`�'� i - 492 32���� � �
<br /> ��� , W/3: 1 SIDE SLOPES .,•� � `r'' o O
<br /> % ,�� ' � '. GRADE CONTROL '.'`ti � c p o 0 0 [ ,
<br /> :� � � � , �' i� ; STRUCTURES AS SHOWN i ����� "' � ii in o �
<br /> „ ����� /� ,� � ON THE FINAL WETLAND �. � i �n � � o �, �
<br /> � i � + MITIGATION PLAN (TYP) � . 491.95 '� � m
<br /> � � � ;`' / ' 488.53 i � � �
<br /> Re � ` ' � ' � ELL 1
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<br /> �° 49� � � VEGETATED TREATMENT 491.56 : � ,��'o�
<br /> � ��� • i � CELL PER DETAIL 2, ��;- ' (Y� '����� ��a
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<br /> � ` SH C-2 4 ' ^ � �
<br /> � '� - ' ���,.� ' '. •-t '.',i OND BAFFLE W o� ♦ �� a
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<br /> � L <'.� "�' • OP 490.00 PE N d ,. N o
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<br /> " ' �i:: c�,� ed,"� r ` �� '', , � • OVERFLOW SPILLWAY 491.24 •;�,�•� ,' DETAIL 3, SHEE 2 4 ' "° � q.�y
<br /> �s - ,� ;_�, ,� �� � ,, �� � � � � BOTTOM 492.60 PER ��� �
<br /> , l; y r,n��t? i DETAIL 4, SHEET C-2.4 490.80 � � �'',� / �} p���p ����
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<br /> ��� �' /,�� � � ! 489.43 490.39 ��� '� �A � �
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<br /> j , / '�i OUTLET-1 y• i�/ '�8e y
<br /> �\ • N: 3569.54 ;� ;. , �
<br /> � E: 542.29 � ,':' ' pe9 0 0 0
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<br /> '� ;�' 12" IE 490.00 W • ' Qs W rn `�m a
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<br /> � � ACCES STA � �. �� W `^ � S
<br /> �o+oo - . :- , CELL 2 '^ �� �
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<br /> � = 7138'10' � , '• �49p- - - - - � p�s N .�.
<br /> R = 35 00" 1 +�00 `;� ' � � �
<br /> L = <,3 ?�' 4 LF 12�� v89 1- �
<br /> �___ > � � 0.00%
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<br /> � POND OUTLET
<br /> ; �::;:;:;.; 2 W/ DEBRIS BARRIER
<br /> ` ` `� N: 3539.16
<br /> -----� E: 518.60
<br /> '` -� -' CB-1, TYPE II-60" � 12" IE 490.00 N �90
<br /> ;,�, ' ' POND CONTROL STRUCTURE - a�5 ,'
<br /> �,� �-. - STORMWATER DETENTION AND
<br /> ;i �� � �' � � 5�e' � W� RISER TEE PER `��� WATER QUALITY POND � o m � � � o
<br /> t ''�`� DETAIL 1, SHEET C-2.4 yo5 N "� u� -- � �
<br /> `, � ;_ „ > � _ LIVE STORAGE = 83,524 CF �
<br /> ' `, ' AND SECONDARY INLET PER °' ..Q ; I = rn
<br /> � _',� > N� : r l^ ~ N:3562A7 �' WQ STORAGE CELL 2 = 57,295 CF r� ,, � �
<br /> � � �✓ DETAIL 9, SHEET C-2.4 �
<br /> � - � �� � E: 519.75 ���� � � � r�n �
<br /> � � RIM = 492.79 PROPOSED CONTOUR (TYP) , � �o Q; a'�
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<br /> � � 12' IE 490.00 E • � � ���,� � � !.
<br /> � � � � 23 LF 12" �" �' � `9" ,_ -� 5.
<br /> O 0.00% EXISTING CONTOUR (TYP)
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<br /> �� STORM DRAINAGE NOTES � � 3 Q
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<br /> Q, 1. THE DESIGN SHOWN IS BASED UPON THE ENGINEER'S UNDERSTANDING OF THE EXISTING 6. STORM DRAINAGE PIPE WITH LESS THAN 2'-0" COVER SHALL BE CLASS IV REINFORCED � Q � Q �
<br /> .s CONDITIONS. THE PLAN DOES NOT REPRESENT A DETAILED FIELD SURVEY. THE EXISTING CONCRETE PIPE, OR APPROVED EQUAL TO SUSTAIN H-20 LOADING. ?�
<br /> o CONDITIONS SHOWN ON THIS PLAN SHEET ARE BASED UPON THE SURVEY PREPARED BY � Z W �
<br /> o GEODIMENSIONS DATED MAY 24, 2016. THE CONTRACTOR IS RESPONSIBLE FOR VERIFYING FIELD 7. ALL ONSITE STORM DRAINAGE PIPE SHALL BE SMOOTH WALLED INTERIOR, MANUFACTURER'S
<br /> � CONDITIONS PRIOR TO 81DDING THE PROPOSED SITEWORK IMPROVEMENTS. IF CONFLICTS ARE VERIFICATION OF MANNING'S ROUGHNESS COEFFICIENT N=0.012 OR LESS. Q � �j,� �
<br /> � D I S C O V E R E D, T H E C O N T R A C T O R S H A L L N O T I F Y T H E O W N E R P R I O R T O I N S T A L L A T I O N O F A N Y � � �
<br /> ` PORTION OF THE SITEWORK WHICH WOULD BE AFFECTED. IF CONTRACTOR DOES NOT ACCEPT W � W Q
<br /> 0 8. PRECAST STRUCTURES MAY BE USED AT CONTRACTOR'S OPTION. W J
<br /> � EXISTING SURVEY, INCLUDING TOPOGRAPHY AS SHOWN ON THE PLANS, WITHOUT EXCEPTION, HE J � � z
<br /> � SHALL HAVE MADE, AT HIS OWN EXPENSE, A TOPOGRAPHIC SURVEY BY A REGISTERED LAND g, ALL CATCH BASINS AND AREA DRAINS ARE TO BE SITUATED SUCH THAT THE OUTSIDE � W �
<br /> o SURVEYOR AND SUBMIT IT TO THE OWNER FOR REVIEW. � � n Q
<br /> � EDGE OF GRATE FRAME IS AT TOE OF CURB OR FLOW LINE OF GUTTER (WHERE APPLICABLE). S` �
<br /> `C 2. CAUTION - NOTICE TO CONTRACTOR O U a' Q
<br /> � 10. CATCH BASIN INLET PROTECTION / EROSI�N CONTROL TO BE USED FOR ALL NEW INLETS. - -
<br /> THE CONTRACTOR IS SPECIFICALLY CAUTIONED THAT THE LOCATION AND/OR ELEVATION OF
<br /> a E X I S T I N G U T I L I T I E S A S S H O W N O N T H E S E P�A N S I S B A S E D O N R E C O R D S O F T H E V A R I O U S PLAN APPROVED � �
<br /> � UTILITY COMPANIES AND, WHERE POSSIBLE, MEASUREMENTS TAKEN IN THE FIELD. THE >>• A�L S T O R M PI P E EN T E RING STRUC TU R ES SHALL BE GROUTED TO ASSURE CONNECTION AT �
<br /> � INFORMATION IS NOT TO BE RELIED ON AS BEING EXACT OR COMPLETE. THE CONTRACTOR MUST STRUCTURE IS WATERTIGHT. � � �,� (6
<br /> a� CALL THE APPROPRIATE UTILITY COMPANY AT LEAST 48 HOURS BEFORE ANY EXCAVATION TO OA
<br /> � 12. ALL STORM SEWER MANHOLES IN PAVED AREAS SHALL BE FLUSH WITH PAVEMENT, AND
<br /> � REQUEST EXACT FIELD LOCATION OF UTILITIES. IT SHALL BE THE RESPONSIBILITY OF THE
<br /> o SHALL HAVE TRAFFIC BEARING RING AND COVERS. MANHOLES IN UNPAVED AREAS SHALL BE
<br /> � CONTRACTOR TO RELOCATE ALL EXISTWG UTILITIES WHICH CONFLICT WITH THE PROPOSED 6" ABOVE FINISH GRADE. LIDS SHALL BE LABELED "STORM SEWER". , °�O" PuecrC►voRxs
<br /> IMPROVEMENTS SHOWN ON THESE PLANS. D£pARnyEM
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<br /> a`� 13. ALL STORM STRUCTURES SHALL HAVE A SMOOTH UNIFORM POURED MORTAR INVERT FROM ' • wieuc woR�cs reer�rr u Q �
<br /> > 3. ALL WORKMANSHIP AND MATERIALS SHALL CONFORM TO THE MOST CURRENT APPLICABLE
<br /> w INVERT IN TO INVERT OUT, UNLESS OTHERWfSE SHOWN IN THE CATCH BASIN DETAIL. nEQv�ncu vn�on ro snnnna
<br /> / �OCAL, STATE, AND FEDERAL STANDARDS. � AN� CONSiRJRIJN o� Trus
<br /> C pROIER. AVVROVAI_ FOR TNIS
<br /> � 14. CONTRACTOR SHALL CONNECT ROOF DRAW LEADERS TO PROPOSED STORM DRAINS AS vnmen ts coryor:�on►t ven �
<br /> a� 4. EXISTING DRAINAGE STRUCTURES TO BE INSPECTED AND REPAIRED AS NEEDED, AND CURRENT rT. AND
<br /> -� EXISTING PIPES TO BE CLEANED OUT TO REMOVE ALL SILT AND DEBRIS. SHOWN. �� „ �- cxmaEs u�-2 -__���ess �QB�
<br /> � � ..r^"��. PE0.NIT F�R CANbTRUGT10N NAS
<br /> p [ER oEFN[SSU[0. ^�A.A
<br /> j 5. IF ANY EXISTING STRUCTURES TO REMAIN ARE DAMAGED DURING CONSTRUCTION IT SHALL t� v L L
<br /> m BE THE CONTRACTORS RESPONSIBILITY TO REPAIR AND/OR REPLACE THE EXISTING STRUCTURE Knowwhat�S �.J@IOW.
<br /> AS NECESSARY TO RETURN IT TO EXISTING CONDITIONS OR BETTER. C111 before OU dl
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