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Home My WebLink AboutR-438818HYDROSEEDING NOTES: MULCHING NOTES: NOTES W 00 It It I 0 LU C LL J 0LU Q 0 (-)6 >_ In U LL1 oI � 00 O 00 N CD N N N N � O 0 N 'tn OD a U_ 1. HYDROSEEDING SHALL BE APPLIED IN ACCORDANCE WITH THE "EROSION CONTROL 8. THE SEEDBED SHALL BE FIRM WITH A FAIRLY FINE SURFACE, FOLLOWING SURFACE NOTES" ON THIS SHEET. ROUGHENING. PERFORM ALL OPERATIONS ACROSS OR AT RIGHT ANGLES TO THE SLOPE. 2. HYDROSEEDING TO BE THE FOLLOWING MIXTURE: -1 1BLE D-2.1.2-B EROSION CON I ROL SEED ]IIN Common NamelLatin Name Species Composition Desired Seeds per Square Foot PLS Pounds(Acre Spike ben[ rassl,4 rostis exarata 6 9 0.1 California brume/Prorntis carinatus 15 23 9.8 Tufted hair rass/Descham sia ces itosa 15 23 0.4 Blue wildr elEl mats giaucus 18 27 10.7 -California oat rass/Danthonia californica 18 27 5.6 Native red fescue/Festuca rubra var. rubs 18 27 2.4 Meadow barleyilHordeum brachyantherum 10 15 7.7 3. APPLICATION TO BE 100 LBS/ACRE. 4. 500 LBS/ACRE 10-20-20 FERTILIZER, 2000 LBS/ACRE WOOD FIBER CELLULOSE AND 40 LBS/ACRE SOIL BINDER OR TACKING AGENT TO BE APPLIED WITH SEED MIXTURE. 5. SEED BEDS PLANTED BETWEEN MAY 1 AND OCTOBER 31 WILL REQUIRE IRRIGATION AND OTHER MAINTENANCE AS NECESSARY TO FOSTER AND PROTECT THE ROOT STRUCTURE. 6. FOR SEED BEDS PLANTED BETWEEN OCTOBER 31 AND APRIL 30, ARMORING OF THE SEED BED WILL BE NECESSARY. (E.G., GEOTEXTILES, JUTE MAT, CLEAR PLASTIC COVERING.) 7. BEFORE SEEDING, INSTALL NEEDED SURFACE RUNOFF CONTROL MEASURES SUCH AS GRADIENT TERRACES, INTERCEPTOR DIKES, SWALES, LEVEL SPREADERS AND SEDIMENT BASINS. 4' "N. I Z' DEPTH Z" - a' ROCK 24' MIN. SETTLING DEPTH 151 MIN 13EDIMEHTSTORAGE J CROSS SECTION NOTES- 1 MAY BE {:ONSTRUCTED BY EXCAVATION OR BY BUILOINC9 A BERM 9. FERTILIZERS ARE TO BE USED ACCORDING TO SUPPLIERS RECOMMENDATIONS. AMOUNTS USED SHOULD BE MINIMIZED, ESPECIALLY ADJACENT TO WATER BODIES AND WETLANDS. 10. SEED SHALL NOT BE USED IN AREAS SUBJECT TO WEAR BY CONSTRUCTION TRAFFIC. I2' OVERFLOW DEPTH 001;LCW CHANNEL IF r CONSTRUCTED BY n EXCAVATION 12' DEPTH 314' • 1 V2" WASHED GRAVEL FILTER FABRIC FENCING UNLESS DTHERWISE N=13. DRAWING 15 NOT TO SCAU INT&; $TI), PLAN = 211.111 PUBLIC WORKS Ea: " + SEDIAAEIT TRAP/z/zoos I 1. DEPARTMENT Cam DATF SEDIMENT TRAP U0 v 0 a a� � Know what's below. Call before you dig. �+ T . kr 3Y WA 2 MIN. -I -� SWALE SPAC ING 10 EPENDS ON SLOPE GRADIENT - NOTES: 1. CONDITIONS 0-FUSE 1_T. RFOUIREI)Ar: 1.11 THE TOP OF ALL SLOPES IN EXCESS OF 3H IV AND WITH MORE THAN 20 FEET OF VERTICAL RELIEF $ 1.2. AT INTERVALS ON ANY SLOPES THAT EXCEEDS THE DIMENSIONS SPECIFIED BELOW. AVERAGE SLOPE SLOPE PERCENT FLOW PATH LENI;M 2OH: IV jOR L E.58) 3.5% 300 FEET (1 OTC) 21)jH IV 5-10% 2UO FEET (4 TO 101HAV 10.25% 1O0 FEET i2 TO 4)FI IV 25-59% 5D FEET 1. MULCH MATERIALS USED SHALL BE HAY OR STRAW, AND SHALL BE APPLIED AT THE RATE OF 2 TONS/ACRE. (MIN. 2" THICK) 2. MULCHES SHALL BE APPLIED IN ALL AREAS WITH EXPOSED SLOPES GREATER THAN 2:1. 3. MULCHING SHALL BE USED IMMEDIATELY AFTER SEEDING OR IN AREAS WHICH CANNOT BE SEEDED BECAUSE OF THE SEASON. 4. ALL AREAS NEEDING MULCH SHALL BE COVERED BY NOVEMBER 1. WET SEASON NOTES: 1. FROM OCTOBER 1ST THROUGH APRIL 30TH, NO SOILS SHALL BE EXPOSED FOR MORE THAN TWO CONSECUTIVE WORKING DAYS. THIS TWO-DAY REQUIREMENT MAY BE APPLIED AT OTHER TIMES OF THE YEAR IF STORM EVENTS WARRANT MORE CONSERVATIVE MEASURES. 2. EXPOSED SOILS SHALL BE STABILIZED AT THE END OF THE WORKDAY PRIOR TO A WEEKEND, HOLIDAY, OR PREDICTED RAIN EVENT. 3. A WEEKLY MAINTENANCE REPORT IS REQUIRED TO BE SUBMITTED TO CED. 2. DESIGN AND INSTALLATION SPECIFICATIQNS 21 FOR SLOPES STEEPER THAN 2H:1V WITH MORE THM 10 FEET OF VERTICAL RELIEF, BENCHES MAYBE CONSTRUCTED OR CLOSER SPACED INTERCEPTOR SWALES MAYBE LASED, THE DESIRED MEASURE MUST BE DESIGNED 9Y AN ENGINEER TO EFFECTIVELY INTIERCEPT THE HIGH VELOCI I RUNOFF TO A SEDIMENT POND OR TRAP. 22 CON$TRiJCTiON TRAFFIC OVER TEMPORARY $WALESSHALL BEMINIMIZED- 3. MMNTENANCE STANDARDS 31 DAMAGE RESUL71NG FROM RUNOFF OR CONSTRUCTLON ACTIVITY SHALL BE REPAIRED IMMEDIATELY, 3.2 IF THE FACILFTIES DO NOT REGULARLY RETA,N STORM RUNOFF, THE CAPACITY AND)pR FRERUF_Nry OF THE SWALES SHALL. BE INCREASED, UN LF55 DTHRR WISF NOTF D, G RA WING L5 H¢i TO SCALE IN751 STD. PLAN - 217.10 PUBLIC WORKS DEPARTMENT INTERCEPTOR SWALE GAZ 9/28/2018 1 twR� s.tRnnnrY� DA I L INTERCEPTOR SWALE f-. TACO MA • S EATTL E �ros72 ��:/► SPOKANE TRI-CITIES 2215 North 30th Street, Suite 300 Tacoma, WA 98403 SIDNAL E� 253.383.2422 TEL 253.383.2572 FAX www.ahbl.com WEB 05/15/2026 OMTER CRITICAL ROOT ZONE (OCRZ) - OMTER NAIF aTIE NOREONTAL DISTANCE OF TIE CRZ RADSB ENCSOACN.EM WTTEtIN VE OF THE OCRZ IEOt1WE4 APPROVAL VA CERTIFIED ARSORI9T NOT ZN EXCIAENT CHEATER HE O Vr N NOT ;N CESS OF VI OF TIE OR REOtIWF6 APVMIf1VAL SY 11E ENGDEB TREE PROTECTION SECTION A A-1-i i C?I:I NOTES: 1. CONDITIONS OF 135£ 1.1. WHERE THERE IS COtdCENTRATED RUNOFF FROM DISTURBED AREAS TO AND FROM SEDIMENT PONDS OR TRAPS. 12 TO CONVEY RLIN0FF INTER CE}TED FROM UNDISTURBED AREAS AROUND THE SITE TO A N0N•ERGSWE DISCHARGE POINT 2. MAINTENANCE STANRARDS 2.1. ANY SEDIMENT DEPOSiT)ON OF MORE THAN G INCHE'S SHALL HE REMOVED SO THAT THE CHANNEL IS RESTORED TO ITS ORIGINAL DESIGN CAPACITY. 2.2 THE CHECK DAMS SHALL BE EXAMINED FOR SIGNS OF SCOURING AND EROSION OF THE BED AND BANKS IF SCOURING AND EROSION HAS OCCURRED, AFFECTED AREAS SHALL SE PROTECTED BY RIPRAP OR AN ERASION CONTROL BLANKET OR NET. UN LF55 OTHERWISE NOTED, RRAVANG 15 NOT TO WALE INT 1; � STD. CLAN - 217.40 1-il PUBLIC WORKS rrR - R DEPARTMENT DITCH CHECK DAMS GAZ/2sI2o18 I fNW v utxAs Aannsbsio Z-A I L DITCH CHECK DAMS Ste w CUBICAL ROOT ZDrE. - U.a-,Yr" IFOOT RADNSFgt AT MAST OF TREES D R.S FO T+AT MAST MGM M0 t1E RADN9 9N US MEAWW FRD I IM 5 ( FACE OF TIE TREES TKW 0R TREE DOUNE - T1E OU E9NOST CIRCU ERENCE OF A TREES LATERAL MANa" WO -EVER DISTANCE W r IS GREATEST }� o- DIAMETER AT 91EAST H EIG (f t1Xs0 KAMM AT 4' - S^ AROVE fAOl1tE) LEVFL UCU LINE SECTION Dee w tcALRooTzoEaaw- DIER HALF OF INS NORIZONTAL DISTANCE OF THE CRZ RAMM Enao�o►saEr wmtlx nE la+z 1s PLASTIC COVERING NOTES: 1. Limits of protection fencing shol extend to the greatest distance from protected trees trunk as needed to perform the work. 2 Adjustments to the critical root zone revee cwtihed orborist opprovat er-o-ty-nn within the iYnNfted critical root zone rogues review opprovd by o certified arboret. 3. Protection fencing shown on plans is ciiogrmmotic. Al protection fencing locations "be field venfmd by the Enynew prior to iwtJatNn ♦. Protection fencing Shall be inspected by the Engineer after i stolt"m for find approval 5. Protection nrastrw"remain intact al A tines during construction unless directed otherwise by the Engmew. 6. See Section 1-0716(2) for oddhiond protection meosurea May31,2024 TREE PROTECTION DETAIL STANDARD PLAN H-10.11-00 SHEET I OF I SHEET APPROVED FOR PUBLICATION Jun 2, 2024 _ STATE DESSG4 ENGSMEIER .,=ertmenh=l .t Stet. Mpof T-fierteth. 1. PLASTIC SHEETING SHALL HAVE A MINIMUM THICKNESS OF 6 MILS AND SHALL MEET THE REQUIREMENTS OF THE STATE STANDARD SPECIFICATIONS SECTION 9-14.5. 2. COVERING SHALL BE INSTALLED AND MAINTAINED TIGHTLY IN PLACE BY USING SANDBAGS OR TIRES ON ROPES WITH A MAXIMUM 10-FOOT GRID SPACING IN ALL DIRECTIONS. ALL SEAMS SHALL BE TAPED OR WEIGHTED DOWN FULL LENGTH AND THERE SHALL BE AT LEAST A 12 INCH OVERLAP OF ALL SEAMS. 3. CLEAR PLASTIC COVERING SHALL BE INSTALLED IMMEDIATELY ON AREAS SEEDED BETWEEN NOVEMBER 1 AND MARCH 31 AND REMAIN UNTIL VEGETATION IS FIRMLY ESTABLISHED. 4. WHEN THE COVERING IS USED ON UN -SEEDED SLOPES, IT SHALL BE KEPT IN PLACE UNTIL THE NEXT SEEDING PERIOD. 5. PLASTIC COVERING SHEET SHALL BE BURIED TWO FEET AT THE TOP OF SLOPES IN ORDER TO PREVENT SURFACE WATER FLOW BENEATH SHEETS. 6. PROPER MAINTENANCE INCLUDES REGULAR CHECKS FOR RIPS AND DISLODGED ENDS. W O O N A, T T C) O O �I Ll N a D J Lid N I� LL