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°w NOTES: RETAINED BACKFILL(WALL.S 1,2,3&5): DRAINAGE ACGREGATE/RETAINED BACKFILL(WALL 4): <br /> = 1. THE SECTION SHOWN IS A REPRESENTATIVE WALL SECTION. THE WALL HEIGHTS, l. RETAINED BACKFILL SHALL BE FREE OF DEBRIS AND ORGANIC 1. DRAINAGE AGGREGATE SHALL HAVE AT LEAST TWO (2) <br /> � ELEVATIONS, TOE SLOPES,AND BACK SLOPES VARY ACCORDING TO THE ELEVATION MATERIAL MEETING THE FOLLOWING GRADATION(PHI=26°): FRACTURED FACES AND NOT BE RIVER ROCK OR PEA GRAVEL. <br /> � PLAN AND SITE PLAN RESPECTNELY. SECTIONS AND DETAILS APPLY TO SAME AND SIEVE SIZE %PASSING 2. DRAINAGE AGGREGATE SHALL CONSIST OF CLEAN 1" CRUSHED <br /> � SIMILAR CONDITIONS UNLESS SPECIFICALLY NOTED OTHERWISE. 2" ]00 STONE MEETING THE FOLLOWING GRADATION: <br /> Z 3/4" 100-75 SIEVE SIZE %PASSING <br /> � 2. UPON EXCAVATION, WHERE UNSUITABLE AND/OR EXPANS[VE SOILS ARE FOUND, <br /> NO.4 20-]00 1" 100 <br /> � SUBCUT TO MINIMUM DEPTH AS REQU[RED BY THE ONSITE GEOTECHNICAL 3/4° 100-75 <br /> o ENGINEER AND REPLACE WITH SUITABLE STRUCTURAL FILL TO ACHIEVE THE N0.200 0-60 <br /> � REQUIRED BEARING CAPACI7Y. THE STRUC7URAL FILL SHALL BE COMPACTED IN 6" NO.4 0-10 <br /> oLIFTS TO A MINIMUM 95%STANDARD PROCTOR DENSITP(ASTM D698). PLASTIC[TY INDEX(PI)<20 NO.50 0-5 <br /> ° 3. APPROXIMATE LIMITS OF EXCAVATION VARIES WHERE SUBCUT IS REQUIRED.ACTUAL LIQUID L[MIT(LL)<40 <br /> > LIMITS AND SIDE SLOPES TO BE DETERMINED BY CONTRACTOR AND MATCH FIELD FREE DRAINING SAND IS ALSO ACCEPTABLE FOR THE DRAINAGE <br /> v CONDITIONS AND OSHA REGULATIONS. MATERIAL.IT MUST HAVE<5%FINES PASSING THE NO.200 SIEVE. <br /> o BOULDER DEPTH SCHEDULE(WALLS 1,2,3&S): <br /> ONSITE MATERIAL IS ACCEPTABLE IF[T MEETS THIS CRITERIA. <br /> W 4. ALL WORK AND MATERIALS SHALL COMPLY WITH ALL STATE, COUNTY, AND CITY WALL HEIGHT(H): BOULDER DEPTH(D): <br /> z REGULATIONS AND CODES AS WELL AS OSHA STANDARDS. 0-4 24" <br /> o NOTES: <br /> z S. THE WALLS ARE DESIGNED WITH A MIN[MUM IS° WALL BATTER USING COULOMB S 28� H1 = EXPOSED WALL HEIGHT <br /> � EARTH PRESSURE THEORY MEETING THE FOLLOWING MINIMUM SAFETY FACTORS: 6 32° H = EXPOSED WALL HEIGHT PLUS EMBEDMENT DEPTH <br /> OVERTURNING 15 <br /> � SLIDING 15 D = MIN[MUM BOULDER DEPTH <br /> � BEARING 2.0 <br /> w <br /> `� 6. THE WALL REQUIRES A MINIMUM 1.0'OF EMBEDMENT. <br /> � <br /> x <br /> p 7. THE MINIMUM BOULDER DEPTH (D) IS A FUNCTION OF THE OVERALL WALL HEIGHT <br /> o AS SHOWN IN THE BOULDER DEPTH SCHEDULE.A SMALLER BOULDER MAY BE USED <br /> ¢ AS A 7�OP BOULDER(D/2)FOR FINISHED GRADING PURPOSES,24"MINIMUM. <br /> r <br /> c <br /> ° 8. BOULDERS SHALL BE PLACED TO AVOID CONTINUOUS JOINT PLANES[N VER7�ICAL OR <br /> � LATERAL DIREC7�IONS. EACH BOULDER SHALL BEAR ON TWO OR MORE ROCKS <br /> z BELOW IT,W[TH GOOD FLAT-TO-FLAT CONTACT.VOIDS SHALL NOT EXCEED 4 INCHES. 8"LOW PERMEABLE SO[L <br /> � SMALLER BOULDERS SHALL BE USED TO FILL ANY VOIDS GREATER THAN 4 INCHES. <br /> U <br /> �, D/2 <br /> � 9. A MINIMUM 8 OUNCE GEOTEXTILE FABRIC SHALL BE PLACED BEHIND BOULDERS <br /> � DURING CONSTRUC7�ION TO PREVEN7� DRAINAGE STONE FROM UIGRATING , <br /> � BETWEEN BOULDERS. - <br /> � � ' RETAW ED SOIL <br /> � 10. 4" DIAMETER CORRUGATED PEREORATED PLASTIC DRAINPIPE WRAPPED WITH A 12"MIN DRAINAGE ZONE � _ <br /> � GEOTEXTILE FABRIC [NSTALLED AS LOW AS POSSIBLE WITH POSITIVE DRAINAGE. (1"CRUSHED STONE) � � <br /> OUTLET AT ENDS OF WALL. <br /> o x ` . ;- -- <br /> _ APPROXIMATE L[MITS <br /> 0 11. TO PREVENT PONDING OF WATER, POSITNE DRAINAGE SHALL BE PROVIDED AT THE � <br /> = TOP AND BOTTOM OF RETAINING WALL. INSPECT EXCAVATION SLOPES FOR ACT[VE • . OF EXCAVATION <br /> FIN[SHED GRADE <br /> � SEEPAGE AND PLACE ADDITIONAL DRAINS WHERE SEEPAGE OCCURS. n� I� • � i <br /> � 12. BACKFILL SOILS PLACED BEHIND THE DRAINAGE ZONE SHALL BE COMPACTED IN ' • : 8 OZ.FILTER FABRIC � <br /> z MAXIMUM 8 INCH LIFTS "fO A M[NIMUM 95% STANDARD PROCfOR DENSITY (ASTM ti ; • • (SEE NOTE 9) �- -� <br /> m D698). IF AN AL7ERNATIVE COMPACTION EFFORT IS REQU[RED FOR 7�HE 12"MIN ' �� •, -. y SEE NOTE 3 <br /> � LANDSCAP[NG FEATURES, USE WHICHEVER IS MORE STRINGENT. CDP DID NOT <br /> ? ANALYZE ANY COMPACT[ON EFFORT REQUIRED FOR ANY BUILDINGS OR D \ <br /> � LANDSCAP[NG FEATURES. \ / � <br /> � 13. DO N07�BR[NG HEAVY COMPACTION OR PAVING EQUIPMENT WITHIN 3 FEET OF THE 1 � / I 1 \ / 1 <br /> � �. � � � <br /> � BACK OF THE PROPOSED RETAINING WALL. ONLY HAND-OPERATED COMPACTION 1 ���/ 1 1 \ � 1 <br /> � EQUIPMENT(E.G.TAMPER,PLATE COMPACTOR,SHEEP'S FOOT ROLLER)SHALL BE USED � <br /> o WITHIN 3 FEET OF THE BACK OF WALL. <br /> � 14. AT THE END OF EACH DAY'S OPERATION, SLOPE THE LAST LIFT OF BACKFILL TO SUBCUT(SEE NOTE 2) 4"DIA DRAINPIPE(SEE NOTE 10) <br /> o DIRECT SURFACE RUNOFF AWAY FROM THE WALL.DO NOT ALLOW SURFACE RUNOFF <br /> z FROM ADJACENT AREAS TO ENTER WALL CONSTRUCTION AREA. BOULDER WALL SECTION A-A <br /> 0 <br /> � <br /> 0 <br /> � <br /> > <br /> U <br /> r <br /> m <br /> v <br /> 0 <br /> 0 <br /> F- <br /> S <br /> U <br /> it �e=����<��BS` p«f«�- Reg"'�a°°°N°' I hereby certi that this I ,,p ification,or report wa,prepared by <br /> cr, No. Dacr R�wi�io�� 6y 7549i <br /> LRB me or under iy dir t pen�':ion and that I am a duly Licensed <br /> o VANYO LANDSCAPE <br /> U 1 (�R(�N�,MINNES�7'f� Professional n 1 i d r e laws of the Stare of Minnesota. <br /> � IVIL z 5�a�e P�o�e«No <br /> � ) , 3 1/4"_]' 15-0136 <br /> I �. �> >� f: � � tr� ��� n �_ � r,���, <br /> � 4 pa��, Sheet No: /�/��/�/� <br /> M t'409LYNDALEAVENUESOUII-I,SUITE2COBLWMINC7DN,MN55120 BOULDER WALL SECTION A�A Date: V�/��/W� <br /> PHl)NE:1952110153121FAX�(763)39L1989�WF;BSITE�NRVW.CI)P-U3.IX)M � uf{{Z11�7�15 � <br /> 4 snaeo�viwn�notvse�ox.as.wcna,.cm�m.s<.xra��.vsx�r..�, � MICIIAEL R.JOHNSON,P.E. <br /> ll 3� /�r,�.�, �i eu� .�l'' �1o�s-��-�� <br />