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Home My WebLink AboutBLD Plot / Site PlansNOTES 1. THE TEMPORARY EROSION CONTROL SYSTEM SHALL BE INSTALLED PRIOR TO ALL CONSTRUCTION. 2. WHERE POSSIBLE MAINTAIN NATURAL VEGETATION FOR EROSION SILTATION CONTROL 3. AS CONSTRUCTION PROGRESSES AND SEASONAL CONDITIONS DICTATE, MORE SILTATION CONTROL FACILITIES MAY BE REQUIRED TO ENSURE COMPLETE SILTATION CONTROL THEREFORE DURING 7HE COURSE OF CONSTRUCTION, IT SHALL BE THE OBLIGATION AND RESPONSIBILITY OF THE CONTRACTOR TO ADDRESS ANY NEW CONDITION THAT MAY BE CREATED AND TO PROVIDE ADDITIONAL FACILITIES OVER AND ABOVE MINIMUM REQUIREMENTS AS MAY BE NEEDED TO ACHIEVE THE PERFORMANCE STANDARD. 4. TEMPORARY SILTATION PONDS AND ALL TEMPORARY SILTATION AND EROSION CONTROLS SHALL BE MAINTAINED IN A SATISFACTORY CONDITION UNTIL SUCH TIME THAT CLEARING AND/OR CONSTRUCTION IS COMPLETED, PERMANENT DRAINAGE FACILITIES ARE OPERATIONAL, AND THE POTENTIAL FOR EROSION HAS PAS-5tU. CONTRACTOR SHALL MAINTAIN A 24 HOUR CONTACT NUMBER FOR EMERGENCY RESPONSE TO MAINTAIN AND REPAIR ALL ONS►TE EROSION AND SEDIMENTATION CONTROL MEASURES AND FACILITIES. 5. ALL DISTURBED LAND AREA UNWORKED FOR SEVEN (7) DAY OR MORE SHALL BE PROTECTED FROM EROSION BY HYRDROSEEDING WITH A MIX OR BY METHOD APPROVED BY THE COUNTY. IF REQUIRED DUE TO WEATHER, TIME OR SITE CONDITIONS, THE HYDROSEEDING SHALL BE SUPPLEMENTED BY MULCHING WITH STRAW A MINIMUM OF 1-INCH THICK AND STAPLING JUTE OR UTILITY MESH OVER THE MULCH. 6. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PREVENTING WATER POLLUTION DUE TO CONSTRUCTION MATERIALS, METHODS, OR EQUIPMENT. WET WEATHER EARTHWORK 1. ALL SITE GRADING SHALL BE PERFORMED BETWEEN MAY 1 AND OCTOBER 31 ALL GRADING SHALL BE COMPLETED TO ALLOW SUFFICIENT TIME OF RE -VEGETATION FOR EROSION CONTROL BEFORE THE ONSET OF WET WEATHER, OCTOBER 31. IF GRADING BETWEEN OCT 31 AND MAY 1, WET WEATHER EROSION PROVISIONS MUST BE OBSERVED. 2. EARTHWORK SHOULD BE PERFORMED IN SMALL AREAS TO MINIMIZE EXPOSURE TO WET WEATHER. EXCAVATION AND REMOVAL OF UNSUITABLE SOILS SHOULD BE FOLLOWED PROMPTLY BY THE PLACEMENT AND COMPACTION OF CLEAN ENGINEERED FILL THE SIZE AND TYPE OF CONSTRUCTION EQUIPMENT MAY HAVE TO BE LIMITED TO PREVENT SOIL DISTURBANCE UNDER SOME CIRCUMSTANCE IT MAY BE NECESSARY TO EXCAVATE SOILS WITH A TRACKHOE TO MINIMIZE SUBGRADE DISTURBANCE CAUSED BY EQUIPMENT TRAFFIC. 3. THE GROUND SURFACE WITHIN THE CONSTRUCTION AREA SHOULD BE GRADED TO PROMOTE RUN-OFF OF SURFACE WATER AND TO PREVENT PONDING OF WATER. 4. MATERIAL USED AS ENGINEERED FILL SHALL SATISFY SECTION 9-03.14(3) OF WSDOT STANDARD SPECIFICATIONS FOR ROAD, BRIDGE, AND MUNICIPAL CONSTRUCTION. ENGINEERED FILL MATERIAL TO CONSIST OF GRANULAR OR NONGRANULAR SOIL AND/OR AGGREGATE WHICH IS FREE OF DELETERIOUS MATERIAL THE MATERIAL SHALL NOT CONTAIN MORE THAN 3 PERCENT ORGANIC MATERIAL BY WEIGHT. THE PLASTICITY INDEX SHALL BE DETERMINED USING TEST METHOD AASHTO T 89 AND AASHTO T 90. SOIL PLASTICITY TO SATISFY REQUIREMENTS USTED IN ABOVE LISTED SECTION. 5. THE GROUND SURFACE WITHIN THE CONSTRUCTION AREA SHOULD BE SEALED BY A SMOOTH DRUM VIBRATORORY ROLLER, OR EQUIVALENT, AND UNDER NO CIRCUMSTANCES SHOULD BE LEFT UN -COMPACTED AND EXPOSED TO MOISTURE SOIL WHICH BECOME TO WET FOR COMPACTION SHOULD BE REMOVED AND REPLACED WITH CLEAN GRANULAR MATERIALS 6. EXCAVATION AND PLACEMENT OF FILL SHALL BE OBSERVED BY THE GEOTECHNICAL ENGINEER TO VERIFY THAT ALL UNSUITABLE MATERIALS ARE REMOVED AND SUITABLE COMPACTION AND SITE DRAINAGE IS ACHIEVED. 7. STRAW WATTLES OR GEOTEXTILE SILT FENCE SHOULD BE STRATEGICALLY LOCATED TO CONTROL EROSION. GRADING NOTES 1. ADDITIONAL WORK WAS WAS DONE BY THE OWNER AND NO LONGER MATCHES ORIGINAL SURVEY. THIS SOIL WILL REQUIRE EXCAVATION DOWN TO ORIGINAL GRADE AND THEN REPLACED WITH APPROVED ENGINEERED FILL AND COMPACTED, SEE SHEET P3 FOR APPROXIMATE OUTLINE OF ADDITIONAL WORK. 2. ALL WORK SHALL CONFORM TO CURRENT MASON COUNTY STANDARDS AND REQUIREMENTS. 3. ALL AREAS TO BE GRADED SHALL BE CLEARED OF ALL VEGETATION DURING THE STRIPPING OF THE ORGANIC TOP SOIL LAYER. 4. ALL UNSUITABLE SOIL SUCH AS SOFT ORGANIC CLAY AND SILTS MUST BE REMOVED TO REDUCE EMBANKMENT SETTLEMENT. 5. ANY TREES THAT WILL BE REMOVED SHOULD BE INDIVIDUALLY REMOVED, TAKING CARE TO REMOVE ALL ROOTS. ROOT CAVITIES SHALL BE INDIVIDUALLY BACKFILLED AND COMPACTED WITH COMPETENT ENGINEERED STRUCTURAL FILL PRIOR TO COMMENCEMENT OF FILL OPERATIONS. 6. STRIPPED SURFACE SOIL SHALL BE STOCKPILED IN DESIGNATED AREAS. 7. CUT AND FILL SLOPES SHALL NOT BE GREATER THAN 1 UNIT VERTICAL IN 2 UNITS HORIZONTAL (50Z). & OVERSIZED MATERIAL GREATER THAN 12 INCHES IN • 110 1p8 0• GRADING NOTES CONT DIAME►tk SHALL NOT BE USED IN ENGINEERED FILL 9. APPROXIMATE CUT VOLUME. 20.716.98 CU. YD. APPROXIMATE Fl VOLUME 23.256.46 CU. YD. ANY STATED CUT AND FILL QUANTITIES ARE APPROXIMATE ONLY. THE CONTRACTOR IS ADVISED TO DETERMINE THEIR OWN TAKEOFF AND QUANTITIES FOR BIDDING. ACTUAL EARTHWORK QUANTITIES MAY VARY DEPENDING ON CONTRACTORS METHOD OF OPERATION, COMPACTION, SHRINKAGE, STRIPPING DEPTHS, AND ACCURACY OF THE EARTHWORK TAKEOFF. WHEN SIGNING THE PROJECT CONSTRUCTION CONTRACT, THE CONTRACTOR AGREES THAT THEIR COST FOR CONSTRUCTION OF THE GRADING IMPROVEMENTS AND DISPOSAL OF EXCESS MATERIAL (IF NECESSARY), IS INCLUDED AND THERE WILL BE NO ADDITIONAL CHARGE FOR THIS ITEM. THE STRUCTURAL MATERIAL FOR THIS SITE IS INTENDED TO BE APPROXIMATELY BALANCED. GRADING DESIGN IS BASED ON THE SURVEY INFORMATION AND FINISH DESIGNED ROUGH GRADING ELEVATIONS. ALL EXISTING INCLUSIONS OF NON-STRUCTURAL OR ORGANIC SOILS AND STRIPPINGS SHALL BE OVER -EXCAVATED AS NECESSARY TO COMPETENT MATERIAL 10. PRIOR TO PLACING COMPACTED FILL AGAINST THE EXISTING NATURAL SLOPES, ALL LOOSE UNDOCUMENTED FILL, TOPSOIL AND SOFT SOILS MUST FIRST BE REMOVED. 11. IF SEEPS OR SPRINGS ARE ENCOUNTERED DURING SITE GRADING, THE GEOTECHNICAL ENGINEER SHALL MAKE RECOMMENDATIONS IN THE FIELD FOR APPROPRIATE SUBSURFACE DRAINAGE SUCH PROVISIONS WOULD LIKELY CONSIST OF SUBSURFACE DRAINS OR 'FRENCH' DRAINS COLLECTING SEEPAGE WATER AT THE SOURCE AND DIRECTING IT IN A CONTROLLED FASHION TO THE STORM DRAIN SYSTEM. LOCATIONS AND DETAILS TO BE APPROVED BY THE COUNTY PRIOR TO INSTALLATION. 12. A STABILIZED CONSTRUCTION ENTRANCE WILL BE REQUIRED AT THE ACCESS ROAD (LOCATE AS SHOWN ON THIS SHEET). CONSTRUCT IN ACCORDANCE WITH BMP C105. 13. SITE PREPARATION, SOIL STRIPPING, AND GRADING SHALL BE OBSERVED AND DOCUMENTED BY AN EXPERIENCED GEOTECHINCAL ENGINEER OR DESIGNATED REPRESENTATIVE 14. IF FILL PLACEMENT IS REQUIRED TO MODIFY SITE GRADES, THE SURFACE AREA SHALL BE APPROPRIATELY PREPARED AS DESCRIBED IN THE PRECEDING NOTES. SURFACE SOILS SHOULD THEN BE SCARIFIED AND COMPACTED PRIOR TO ADDITIONAL FILL PLACEMENT. ENGINEERED STRUCTURAL FILL SHALL B(_ PLACED IN LOOSE LIFTS NOT EXCEEDING 12-INCHES IN DEPTH AND COMPACTED USING STANDARD CONVENTIONAL COMPACTION EQUIPMENT. THE SOIL • B / 42223-34-00090 OWNER SHELDON PROPERTIES • 128 12¢ 122 120 118 116 GRADING NOTES CONT MOISTURE CONTENT SHALL BE WITHIN TWO PERCENTAGE POINTS OF OPTIMUM CONDITIONS. A FIELD DENSITY AT LEAST EQUAL TO 95 PERCENT OF MAXIMUM DRY DENSITY, OBTAINED FROM MODIFIED PROCTOR MOISTURE DENSITY RELATIONSHIP TEST (ASTM D1557), IS REQUIRED FOR STRUCTURAL FILL PLACEMENT. FOR ENGINEERED STRUCTURAL FILL PLACED ON SLOPE GRADES, THE AREA SHALL BE BENCHED TO PROVIDE A HORIZONTAL SURFACE FOR COMPACTION. PER DETAIL N, SHEET P9. 15. COMPACTION OF ENGINEERED STRUCTURAL FILL SHALL BE VERIFIED BY NUCLEAR GAUGE FIELD COMPACTION TESTING PERFORMED IN ACCORDANCE WITH ASTM D2922-91 AND ASTM D3017-88 (93). FIELD COMPACTION TESTING SHALL BE PERFORMED FOR EACH VERTICAL FOOT OF ENGINEERED FILL PLACED. ENGINEERED FILL PLACEMENT SHALL BE OBSERVED BY AN EXPERIENCED GEOTECHNNCAL ENGINEER OR DESIGNATED REPRESENTATIVE 16. IF ADEQUATE COMPACTIONS IS NOT ACHIEVABLE WITH CLEAN NATIVE SOILS; IMPORT STRUCTURAL FILL CONSISTING OF YELL -GRADED GRANULAR MATERIAL WITH A MAXIMUM PARTICLE SIZE OF 3-INCHES AND NO MORE THAN 5 PERCENT PASSING THE NO. 200. 17. REPRESENTATIVE SAMPLES OF PROPOSED ENGINEERED STRUCTURAL FILL MATERIAL SHALL BE SUBMITTED FOR LABORATORY ANALYSIS AND APPROVAL BY THE GEOTECHNICAL ENGINEER PRIOR TO PLACEMENT. 42223-34-00080 OWNER: SHELDON PROPERTIES 142 140_ 138 136 134 \ \ 132 42223-34-00100 OWNER: MASON COUNTY PUD NO.1 114 112 110 108 106 139 128 LEGEND C CULVERT STORMWATER MANHOLE SD STORMWATER LINE GRADING CUT LIMIT F GRADING FILL LIMIT STRAW WATTLES x SILT FENCE DEVELOPMENT PROPERTY LINE UNDERGROUND POWER LINE Cut/Fill Summary - Approximate Volumes Name Cut Factor Fill Factor 2d Area Cut Fill Net VOLUME 1.000 1.000 204688.98 Sq. Ft. 20716.98 Cu. Yd. 23246.46 Cu. Yd. 2549.74 Cu. Yd. ill> Totals DITCH INLET AND PROFILE, WATER LINE (LOCATION APPX.) SEE DETAIL I & J, SHEET P8 PHASE 2 SECTION 2, P5 PHASE 2 SECTION 1, P5 h 42223-34-00030 OWNER: MASON COUNTY PUD NO.1 126 10 i22 116 SILT FENCE BMP C233 SEE DET. M. SHEET P9 42223-34-60020 OWNER: CITY OF TACOMA STRAW WATTLES BMP C235 SEE DETAIL K, P8 ii4 112 110 / / / Jv / / / / / / / / / / / / / / N / COVERED STORAGE SECTION 1, P6 COVERED STORAGE SECTION 2, P6 148 106 104 102 1o9 98 146 144 2549.74 Cu. Yd. <F Il> TEMPORARY SEDIMENT POND CROSS SECTION A, P7 CROSS SECTION B, P7 CROSS SECTION C, P7 OUTLET PROTECTION BMP C209 TEMPORARY SEDIMENT POND BMP C241 SEE DETAIL A, SHEET P7 \ 90, 142 } 1.+DS PPE E=105.7r / /STORMWATER DITCH / / BMP C201 / / SEE DETAIL F, P7 / / / / / / %ti� � ti ti 4 LIMITS OF GRADING ./ COVERED STORAGE SECTION 3, P6 12MEkE E=If i39 42223-34-60020 OWNER MASON COU x v. 1i2 PU 112 143 STABILIZED CONSTRUCTION ENTRANCE BMP C105 SEE DET. L, SHEET P8 204688.98 Sq. Ft. 20716.98 Cu. Yd. % at*" 0 rFr J \\ a -� /✓ 0 to NO.1 MANHOLE DRAIN, SEE DETAIL H, SHEET P7 104 23246.46 Cu. Yd. ADO INFILTRATION TRENCH, SEE DETAIL G, SHEET P7 98 96 94 9� CL w a a H a a F SUBMITTAL SHEET SET REVISIONS AND CORRECTIONS INITIAL DESIGN REVISION DESCRIPTION 0 0 0 0 w w c BKI PROJECT NO: MA18-005 CONTRACT NO: MASON COUNTY r1 2 M MASON COUNTY PUD NO.1 oo O In ,--� co a 2 ^ 01 L N LLJ Z if) P4 4 / 9