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<br />NOTE 5
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<br />NOTE 8
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<br />TT
<br />KEY
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<br />H =
<br />HEIGHT OF ROCK WALL.
<br />444 Q4a4
<br />TT =
<br />NO TEMPORARY EXCAVATION
<br />a a c
<br />accc
<br />aa
<br />WITHIN 5FT BEHIND ROCKERY.
<br />c°c
<br />PF =
<br />NO PERMANENT EXCAVATION OR
<br />— a a ° a
<br />c
<br />SURCHARGING BEHIND ROCKERY
<br />c a c
<br />CLOSER THAN A DISTANCE EQUAL
<br />° °
<br />TO H.
<br />4 4
<br />c a c
<br />TC=
<br />NO TEMPORARY EXCAVATION
<br />BELOW LIMITS DEFINED BY A LINE
<br />V OUT FROM BASE OF ROCKERY
<br />WITH A SLOPE OF 1H:-IV TO A
<br />DISTANCE EQUAL TO 2/3H FROM
<br />ROCKERY BASE.
<br />PC=
<br />MAX FINISHED GRADE OR
<br />PERMANENT EXCAVATION DEFINED
<br />BY A FROM BASE OF ROCKERY
<br />WITH A SLOPE OF 2H:-1V FOR A
<br />MIN DISTANCE EQUAL TO H FROM
<br />ROCKERY BASE.
<br />LEGEND
<br />DRAINAGE MATERIALS TO CONSIST
<br />OF CLEAN 4"-2" ANGULAR SPALLS.
<br />GRADING ##57 AGGREGATE PER SECTION
<br />9.03.1(4)C OF WSDOT/APWA STANDARD
<br />SPECIFICATION
<br />a<
<br />CONCRETE ROCKERY CAP, REQUIRED IN
<br />R.O.W., OPTIONAL ON PRIVATE PROPERTY
<br />UNDISTURBED NATIVE SOIL
<br />SEED OR SOD ON 12" OF TOPSOIL
<br />WITH UNDERLAYER OF FILTER FABRIC,
<br />4 INCH DIAMETER, HDPE OR SDR35 PVC,
<br />PERFORATED OR SLOTTED, WITH SMOOTH
<br />INTERIOR PIPE. SET SLIGHTLY LOWER
<br />THAN THE BASE ROCK TO PREVENT
<br />DAMAGE, LAY WITH A POSITIVE SLOPE TO
<br />DISCHARGE AWAY FROM ROCKERY.
<br />DESIGNATES SIZE OF ROCK, I.E. 4 MAN.
<br />SEE NOTE 10.
<br />PLACEMENT (COTES
<br />1. APPROVAL FOR THE PLACEMENT OF THE
<br />ROCKERY WILL DEPEND ON EXISTING AND
<br />PROPOSED UNDERGROUND UTILITY LOCATIONS.
<br />THE CITY OF EVERETT PUBLIC WORKS
<br />DEPARTMENT WILL REVIEW ROCKERY
<br />PLACEMENT,
<br />NOTES
<br />1. MAXIMUM INCLINATION OF THE SLOPES ABOVE
<br />AND BEHIND ROCK WALL SHALL BE 2:1
<br />(HORIZONTAL:VERTICAL).
<br />2. MINIMUM THICKNESS OF ROCK FILTER LAYER B=12
<br />INCHES. MINIMUM EMBEDMENT D=12 INCHES.
<br />3. MAXIMUM ROCK WALL HEIGHT H=8 FEET. ROCK
<br />WALLS GREATER THAN 8 FEET IN HEIGHT SHALL BE
<br />DESIGNED BY A CIVIL ENGINEER LICENSED IN THE
<br />STATE OF WASHINGTON.
<br />4. ROCK SHALL BE PLACED TO GRADUALLY DECREASE IN
<br />SIZE WITH INCREASING WALL HEIGHT,
<br />5. MINIMUM WIDTH OF KEYWAY EXCAVATION W,
<br />SHALL BE EQUAL TO THE THICKNESS OF THE BASE
<br />ROCK PLUS B (ROCK FILT ER).
<br />6. THE LONG DIMENSION OF THE ROCKS SHALL EXTEND
<br />BACK TOWARDS THE CUT OR FILL FACE TO PROVIDE
<br />MAXIMUM STABILITY.
<br />7. WHENEVER POSSIBLE EACH ROCK SHALL BEAR ON
<br />TWO OR MORE ROCKS BELOW IT, WITH GOOD
<br />FLAT -TO -FLAT CONTACT.
<br />8. WHERE VOIDS OF GREATER THAN 6 INCHES IN
<br />DIMENSIONS EXIST IN THE POCK FACE AND THERE IS
<br />NO ROCK CONTACT WITHIN THE ROCK WALL
<br />THICKNESS, THE VOID SHALL BE CHINKED WITH
<br />SMALL PIECES OF ROCK,
<br />9. ROCKERIES WHICH ARE MORE THAN 30 INCHES
<br />ABOVE GRADE OR FLOOR BELOW SHALL BE
<br />PROTECTED BY A PEDESTRIAN GUARD. TYPE TO BE
<br />DETERMINED BY THE CITY ENGINEER, SEE STANDARD
<br />DRAWINGS 333 & 334.
<br />10. THE DENSITY OF ROCK MATERIAL SHALL BE A
<br />MINIMUM OF 155 PCF. THE SIZE CATEGORIES FOR
<br />ROCK SHALL BE AS FOLLOWS:
<br />SIZE
<br />APPROXIMATE
<br />WEIGHT - LBS
<br />APPROXIMATE
<br />DIAMETER -INCHES
<br />1 MAN
<br />50-200
<br />12-18
<br />2 MAN
<br />200-700
<br />18-28
<br />3 MAN
<br />700-2000
<br />28-36
<br />4 MAN
<br />2000-4000
<br />36-48
<br />5 MAN
<br />4000-6000
<br />48-54
<br />6 MAN
<br />6000-8000
<br />54-60
<br />CITY _ EVERET
<br />PUBLIC WORKS DEPARTMENT
<br />SASS
<br />TIT. R... f
<br />ROCKERY/2017
<br />CONSTRUCTION REQUIREMENTS, 332
<br />PLACEMENT & POST
<br />CONSTRUCTION LIMITS
<br />k
<br />BMP ®1 a POST -CONSTRUCTION I
<br />COMPOST USED IN BIORETENTION AREAS SHOULD RF S TABLE, MATURE AND DERIVED FROM YARD
<br />THIS RMP SHALL RE USED IN THE LANDSCAPED AREAS ON THE SITE AND ANY OTHER DISTURBED AREAS.
<br />DEBRIS, WOOD WASTE, OR OTHER ORGANIC MATERIALS THAT MEET THE INTENT OF THE ORGANIC SOIL
<br />AMENDMENT SPECIFICATION. BIOSOLIDS AND MANURE COMPOSTS CAN BE HIGHER IN BIO-AVAILABLE
<br />PURPOSE AND DEFINITION:
<br />PHOSPHORUS THAN COMPOST DERIVED FROM YARD OR PLANT WASTE AND THEREFORE ARE NOT
<br />NATURALLY OCCURRING (UNDISTURBED) SOIL AND VEGETATION PROVIDE IMPORTANT STORMWATER
<br />ALLOWED IN BIORETENTION AREAS DUE TO THE POSSIBILITY OF EXPORTING BIO-AVAILABLE
<br />FUNCTIONS INCLUDING: WAT ER INFILTRATION; NUTRIENT, SEDIMENT, AND POLLUTANT ADSORPTION;
<br />PHOSPHORUS IN EFFLUENT.
<br />SEDIMENT AND POLLUTANT BIOFILTRATION; WATER INTERFLOW STORAGE AND TRANSMISSION; AND
<br />POLLUTANT DECOMPOSITION. THESE FUNCTIONS ARE LARGELY LOST WHEN DEVELOPMENTSTRIPS AWAY
<br />THE COMPOST MUST ALSO HAVE AN ORGANIC MAT TER CONTENT OF 35% TO 65%, AND A CARBON TO
<br />NATIVE SOIL AND VEGETATION AND REPLACES IT WITH MINIMA! TOPSOIL AND SOD. NOT ONLY ARE THESE
<br />NITROGEN RATIO BELOW 25:1.
<br />IMPORTANT STORMWATER FUNCTIONS LOST, BUT SUCH LANDSCAPES THEMSELVES BECOME POLLUTION-
<br />GENERATING PERVIOUS SURFACES DUE TO INCREASED USE OF PESTICIDES, FERTILIZERS AND OTHER
<br />THE CARBON TO NITROGEN RATIO MAY BE AS NIGH AS 35:1 FOR PLANTINGS COMPOSED ENTIRELY OF
<br />LANDSCAPING AND HOUSEHOLD/INDUSTRIAL CHEMICALS, THE CONCENTRATION OF PET WASTES, AND
<br />PLANTS NATIVE TO THE PUGET SOUND LOWLANDS REGION.
<br />POLLUTANTS THAT ACCOMPANY ROADSIDE LITTER,
<br />B. CALCULATED AMENDMENT RATES MAY BE MET THROUGH USE OF COMPOSTED MATERIALS AS
<br />ESTABLISHING SOIL QUALITY AND DEPTH REGAINS GREATER STORMWATER FUNCTIONS IN THE POST
<br />DEFINED ABOVE; OR OTHER ORGANIC MATERIALS AMENDED TO MEET THE CARBON TO NITROGEN RATIO
<br />DEVELOPMENT LANDSCAPE, PROVIDES INCREASED TREATMENT OF POLLUTANTS AND SEDIMENTS THAT
<br />REQUIREMENTS, AND MEETING THE CONTAMINANT STANDARDS OF GRADE A COMPOST.
<br />RESULT FROM DEVELOPMENT AND HABITATION, AND MINIMIZES THE NEED FOR SOME LANDSCAPING
<br />CHEMICALS, THUS REDUCING POLLUTION ION THROUGH PREVENTION.
<br />THE RESULTING SOIL SHOULD BE CONDUCIVE TO THE TYPE OF VEGETATION TO BE ESTABLISHED.
<br />APPLICATIONS AND LIMITATIONS:
<br />IMPLEMENTATION OPTIONS: THE SOIL QUALITY DESIGN GUIDELINES LISTED ABOVE CAN BE MET BY USING
<br />ESTABLISHING A MINIMUM SOIL QUALITY AND DEPTH IS NOT THE SAME AS PRESERVATION OF NATURALLY
<br />ONE OF THE METHODS LISTED BELOW,
<br />OCCURRING SOIL AND VEGETATION. HOWEVER, ESTABLISHING A MINIMUM SOIL QUALITY AND DEPTH WILL
<br />1. LEAVE UNDISTURBED NATIVE VEGETATION AND SOIL, AND PROTECT FROM COMPACTION DURING
<br />PROVIDE IMPROVED ON -SITE MANAGEMENT OF STORMWATER FLOW AND WAT ER QUALITY.
<br />CONSTRUCTION.
<br />SOIL ORGANIC MATTER CAN BE ATTAINED THROUGH NUMEROUS MATERIALS SUCH AS COMPOST,
<br />2. AMEND DISTURBED SOIL ACCORDING TO THE FOLLOWING PROCEDURES:
<br />COMPOSTED WOODY MATERIAL, BIOSOLIDS, AND FOREST PRODUCT RESIDUALS. IT IS IMPORTANT THAT THE
<br />MATERIALS USED TO MEET THE SOIL QUALITY AND DEPTH BMP BE APPROPRIATE AND BENEFICIAL TO THE
<br />A. SCARIFY SUBSOIL TO A DEPTH OF ONE FOOT
<br />PLANT COVER TO BE ESTABLISHED. LIKEWISE, IT IS IMPORTANT THAT IMPORTED TOPSOILS IMPROVE SOIL
<br />B. IN PLANTING BEDS, PLACE THREE INCHES OF COMPOST AND TILL IN TO AN EIGHT -INCH DEPTH.
<br />CONDITIONS AND DO NOT HAVE AN EXCESSIVE PERCENT OF CLAY FINES,
<br />C. IN TURF AREAS, PLACE TWO INCHES OF COMPOST' AND TILL IN TO AN EIGHT -INCH DEPTH.
<br />D. APPLY TWO TO FOUR INCHES OF ARBORIST WOOD CHIP, COARSE BARK MULCH, OR COMPOST MULCH
<br />DESIGN GUIDELINES.
<br />TO PLANTING BEDS AFTER FINAL PLANTING.
<br />SOIL RETENTION:
<br />THE DUFF LAYER AND NAI IVE TOPSOIL SHOULD BE RETAINED IN AN UNDISTURBED URBED STATE TO TIME MAXIMUM
<br />ALTERNATIVELY, DISTURBED SOIL CAN BE AMENDED ON A SITE -CUSTOMIZED MALULER SO THAT IT MEETS
<br />EXTENT PRACTICABLE. IN ANY AREAS REQUIRING GRADING REMOVE AND STOCKPILE THE DUFF LAYER AND
<br />T HE SOIL QUALITY CRITERIA SET FORTH ABOVE, AS DETERMINED BY A LICENSED ENGINEER, GEOLOGIST,
<br />TOPSOIL ON SITE IN A DESIGNATED, CONTROLLED AREA, NOT ADJACENT TO PUBLIC RESOURCES AND
<br />LANDSCAPE ARCHITECT, OR OTHER PERSON AS APPROVED BY SRI®HOMISH COUNTY.
<br />CRITICAL AREAS, TO BE REAPPLIED TO OTHER PORTIONS OF THE SITE WHERE FEASIBLE.
<br />3. STOCKPILE EXISTING TOPSOIL DURING GRADING, AND REPLACE IT PRIOR TO PLANTING. STOCKPILED
<br />SOIL QUALITY:
<br />TOPSOIL MUST BE AMENDED IF NEEDED TO MEET THE ORGANIC MATTER AND DEPTH REQUIREMENTS BY
<br />ALL AREAS SUBJECT TO CLEARING AND GRADING THAT HAVE NOT BEEN COVERED BY IMPERVIOUS
<br />FOLLOWING THE PROCEDURES IN METHOD (2) ABOVE.
<br />SURFACE, INCORPORATED INTO A DRAINAGE FACILITY OR ENGINEERED AS STRUCTURAL FILL OR SLOPE
<br />SHALL, AT PROJECT COMPLETION, DEMONSTRATE THE FOLLOWING:
<br />4. IMPORT TOPSOIL MIX OF SUFFICIENT ORGANIC CONTENT AND DEPTH TO MEET THE ORGANIC MATTER
<br />ER
<br />AND DEPTH REQUIREMENTS.
<br />1. A TOPSOIL LAYER WITH A MINIMUM ORGANIC MATTER CONTENT OFTEN PERCENT DRY WEIGHT IN
<br />PLANTING BEDS, AND 5% ORGANIC MATTER CONTENT (BASED ON A LOSS -ON -IGNITION TEST) IN TURF
<br />MORE THAN ONE METHOD MAY BE USED ON DIFFERENT PORTIONS OF THE SAME SITE. SOIL THAT ALREADY
<br />AREAS, AND A PH FROM 6.0 TO 8.0 OR MATCHING THE PH OF THE ORIGINAL UNDISTURBED SOIL. THE
<br />MEETS THE DEPTH AND ORGANIC MATTER QUALITY STANDARDS, AND IS NOT COMPACTED, DOES NOT NEED
<br />TOPSOIL LAYER SHALL HAVE A MINIMUM DEPTH OF EIGHT INCHES EXCEPT WHERE TREE ROOTS LIMIT THE
<br />TO BE AMENDED.
<br />DEPTH OF INCORPORATION OF AMENDMENTS NEEDED TO MEET THE CRITERIA. SUBSOILS BELOW THE
<br />TOPSOIL LAYER SHOULD BE SCARIFIED AT LEAST 4 INCHES WITH SOME INCORPORATION OF THE UPPER
<br />MAINTENANCE:
<br />MATERIAL TO AVOID STRATIFIED LAYERS, WHERE FEASIBLE.
<br />1, SOIL QUALITY AND DEPTH SHOULD BE ESTABLISHED TOWARD THE END OF CONSTRUCTION AND ONCE
<br />ESTABLISHED, SHOULD BE PROTECTED ED FROM COMPACTION, SUCH AS FROM LARGE MACHINERY USE, AND
<br />2. PLANTING BEDS MUST BE MULCHED WITH 2 INCHES OF ORGANIC MATERIAL
<br />FROM EROSION,
<br />3. QUALITY OF COMPOST AND OTHER MATERIALS USED TO MEET THE ORGANIC CONTENT
<br />2. SOIL SHOULD BE PLANTED AND MULCHED AFTER INSTALLATION.
<br />REQUIREMENTS:
<br />A. THE ORGANIC CONTENT FOR "PRE -APPROVED" AMENDMENT RATES CAN BE MET ONLY USING
<br />3, PLANT DEBRIS OR ITS EQUIVALENT SHOULD BE LEFT ON THE SOIL SURFACE TO REPLENISH ORGANIC
<br />COMPOST THAT MEETS THE DEFINITION OF "COMPOSTED MATERIALS" IN WAC 173-350-220. THIS CODE IS
<br />MATTER.
<br />AVAILABLE ONLINE AT:
<br />HTTP:/ W.ECY.WA.GOVFPROGRAMS/SWFA/FACILITIES/350.HTML.
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<br />P:\WORK\PROJECTS\2018\18-141 EMORY'S\CE\DWG\SHEETS\C4.0 GRADING & PAVING PLAN.DWG 10/23/2019
<br />UNPUBLISHED WORK COPYRIGHT© 2019 BY HARMSEN & ASSOCIATES INC. M
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