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Home My WebLink AboutROWP23-0016 Approved Site PlanSE 2ND CT SE 2ND ST SE 2ND PL SE 3RD PL SE 138TH PL SE 6TH PL SE 7TH PL SE 142ND ST SE 141ST PL SE 140TH PL SE 139TH PL SE 138TH PL SE 143RD ST SE 2ND LN 156TH AVE SESHADOW PLACE SETOLEDO AVE SEROSARIOPL SE152ND AVE SE154TH AVE SE150TH PL SE149TH PL SE148TH PL SE148THPL SESE 142N D P L SE 142N D P L SE 4TH PL SE 5TH PLROSARIOAVE SEMAPLEWOOD PARK WAPATO PL SESE 143RD PLSE139THCT0+00 1+00 2+00 3+00 3+61 1 2 3 4 TEL www.ahbl.comWEBTELwww.ahbl.comWEBTELwww.ahbl.comWEB 2215 North 30th Street, Suite 300 Tacoma, WA 98403 253.383.2422TEL www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES Know what's below. before you dig.Call R 253.383.2572 FAX 4 SK/MWGBRI/JT REVISED PER KC COMMENTS DATED 11/9/23 REVISED PER KC COMMENTS DATED 1/4/24 REVISED PER KC COMMENTS DATED 6/28/24 7/22/2024 154TH AVE SE DITCH IMPROVEMENTS PERMIT SET 2221005.10 12600 SE 38TH STREET BELLEVUE, WA 98006 CONTACT: DALTON SMITH PHONE: (888)302-1252 CONNER HOMES MAPLE HIGHLANDS 154TH AVE SE DITCH IMPROVEMENTS SW 1/4, SEC 14, TWN 23, RGE 5, KING COUNTY MAPLE HIGHLANDS - 154TH AVE SE DITCH IMPROVEMENTS OWNER CONNER HOMES 12600 SE 38TH STREET BELLEVUE, WA 98006 PH: (888) 302-1252 CONTACT: DALTON SMITH SURVEYOR AHBL 2215 NORTH 30TH STREET, SUITE 300 TACOMA, WA 98403 PH. (253) 383-2422 CONTACT: DAVE FOLLANSBEE, PLS CIVIL ENGINEER AHBL 2215 NORTH 30TH STREET, SUITE 300 TACOMA, WA 98403 PH. (253) 383-2422 CONTACT: SCOTT KAUL, PE GEOTECH THE RILEY GROUP, INC. 17522 BOTHELL WAY NE BOTHELL, WA 98011 PH: (425) 415-0551 CONTACT: KRISTINA WELLER, PE TRENCH NOTE IF WORKERS ENTER ANY TRENCH OR OTHER EXCAVATION FOUR OR MORE FEET IN DEPTH THAT DOES NOT MEET THE OPEN PIT REQUIREMENTS OF WSDOT SECTION 2-09.3(3)B, IT SHALL BE SHORED AND CRIBBED. THE CONTRACTOR ALONE SHALL BE RESPONSIBLE FOR WORKER SAFETY AND AHBL ASSUMES NO RESPONSIBILITY. ALL TRENCH SAFETY SYSTEMS SHALL MEET THE REQUIREMENTS OF THE WASHINGTON INDUSTRIAL SAFETY AND HEALTH ACT, CHAPTER 49.17 RCW. UTILITY NOTE THE LOCATIONS OF EXISTING UNDERGROUND UTILITIES ARE APPROXIMATE ONLY AND HAVE NOT BEEN INDEPENDENTLY VERIFIED BY THE OWNER OR ITS REPRESENTATIVE. THE CONTRACTOR SHALL DETERMINE THE EXACT LOCATION OF ALL EXISTING UTILITIES BEFORE COMMENCING WORK AND AGREES TO BE FULLY RESPONSIBLE FOR ANY AND ALL DAMAGES THAT HAPPEN DUE TO THE CONTRACTOR'S FAILURE TO LOCATE EXACTLY AND PRESERVE ANY AND ALL UNDERGROUND UTILITIES. AHBL ASSUMES NO LIABILITY FOR THE LOCATION OF UNDERGROUND UTILITIES. BASIS OF BEARING WASHINGTON STATE PLAN COORDINATE SYSTEM, NAD 83/91 NORTH ZONE 4601 PER CITY OF RENTON COORDINATE SYSTEM. VERTICAL DATUM NAVD 88 - CONTRACTOR TO VERIFY ELEVATIONS TO LOCAL SITE CONTROL PRIOR TO CONSTRUCTION. FILL SPECIFICATION FILL MATERIAL SHALL NOT CONTAIN PETROLEUM PRODUCTS, OR SUBSTANCES WHICH ARE HAZARDOUS, DANGEROUS, TOXIC, OR WHICH OTHERWISE VIOLATE ANY STATE, FEDERAL, OR LOCAL LAW, ORDINANCE, CODE, REGULATION, RULE, ORDER, OR STANDARD SITE ADDRESS 154TH AVE SE RIGHT-OF-WAY, NORTH OF SE 142ND ST SITE VICINITY MAP SCALE: 1"=500' EXISTING LEGEND 154TH AVE SE NGRAPHIC SCALE 0 20 40 1" = 20 FEET 10 DATE: July 19, 2024 FILENAME: Q:\2022\2221005\10_CIV\CAD\_King County ROW\2221005-SH-COVR.dwg C0.1 1 COVER SHEET DITCH SHEET INDEX Sheet Number Sheet Title C0.1 COVER SHEET C1.1 154TH AVE SE DITCH TESC PLAN C2.1 154TH AVE SE DITCH PLAN & PROFILE C2.2 DITCH NOTES AND DETAILS 08/08/2024 King County DLS - Permitting Approval Review Engineer Date Senior Engineer Date Development Engineer Date ROWP23-0016 ROWP23-0016 Sheet 1 of 4 8-29-2024 8/29/2024 CL REMOVE DEBRIS AND SEDIMENT FROM CULVERT PROTECT EXISTING UTILITIES (TYP.) REMOVE DEBRIS AND SEDIMENT FROM CULVERT REMOVE DEBRIS AND SEDIMENT FROM CULVERT PROTECT EXISTING UTILITIES (TYP.)377377 3 7 8 378380377378379REMOVE DEBRIS AND SEDIMENT FROM CULVERT 1 2 3 4 TEL www.ahbl.comWEBTELwww.ahbl.comWEBTELwww.ahbl.comWEB 2215 North 30th Street, Suite 300 Tacoma, WA 98403 253.383.2422TEL www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES Know what's below. before you dig.Call R 253.383.2572 FAX 4 SK/MWGBRI/JT REVISED PER KC COMMENTS DATED 11/9/23 REVISED PER KC COMMENTS DATED 1/4/24 REVISED PER KC COMMENTS DATED 6/28/24 7/22/2024 154TH AVE SE DITCH IMPROVEMENTS PERMIT SET 2221005.10 12600 SE 38TH STREET BELLEVUE, WA 98006 CONTACT: DALTON SMITH PHONE: (888)302-1252 CONNER HOMES MAPLE HIGHLANDS 154TH AVE SE DITCH IMPROVEMENTS SW 1/4, SEC 14, TWN 23, RGE 5, KING COUNTY MAPLE HIGHLANDS - 154TH AVE SE DITCH IMPROVEMENTS 154TH AVE SE NGRAPHIC SCALE 0 20 40 1" = 20 FEET 10 DATE: July 19, 2024 FILENAME: Q:\2022\2221005\10_CIV\CAD\_King County ROW\2221005-SH-TESC.dwg C1.1 2 154TH AVE SE DITCH TESC PLAN TESC AND DEMO LEGEND CLEARING LIMITS EXISTING GRADE CONTOUR FINISHED GRADE CONTOUR CL ELEV NOTES 1.CLEAR ALL CULVERTS OF DEBRIS AND SEDIMENT WITHIN THE PROJECT LIMITS. 2.CONTRACTOR TO POTHOLE AND VERIFY LOCATION AND ELEVATION OF EXISTING UTILITIES. LIMITS TO INCLUDE SEDIMENT AND DEBRIS REMOVAL ALONG THE DITCH AND CULVERTS ELEV 1.APPROVAL OF THIS EROSION AND SEDIMENTATION CONTROL (ESC) PLAN DOES NOT CONSTITUTE AN APPROVAL OF PERMANENT ROAD OR DRAINAGE DESIGN (E.G. SIZE AND LOCATION OF ROADS, PIPES, RESTRICTORS, CHANNELS, RETENTION FACILITIES, UTILITIES, ETC.) 2.THE IMPLEMENTATION OF THESE ESC PLANS AND THE CONSTRUCTION, MAINTENANCE, REPLACEMENT, AND UPGRADING OF THESE ESC FACILITIES IS THE RESPONSIBILITY OF THE APPLICANT/ESC SUPERVISOR UNTIL ALL CONSTRUCTION IS APPROVED. 3.THE BOUNDARIES OF THE CLEARING LIMITS SHOWN ON THIS PLAN SHALL BE CLEARLY FLAGGED BY SURVEY TAPE OR FENCING, IF REQUIRED, PRIOR TO CONSTRUCTION (KING COUNTY SWDM APPENDIX D). DURING THE CONSTRUCTION PERIOD, NO DISTURBANCE BEYOND THE CLEARING LIMITS SHALL BE PERMITTED. THE CLEARING LIMITS SHALL BE MAINTAINED BY THE APPLICANT/ESC SUPERVISOR FOR THE DURATION OF CONSTRUCTION. 4.STABILIZED CONSTRUCTION ENTRANCES SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE PROJECT. ADDITIONAL MEASURES, SUCH AS CONSTRUCTED WHEEL WASH SYSTEMS OR WASH PADS, MAY BE REQUIRED TO ENSURE THAT ALL PAVED AREAS ARE KEPT CLEAN AND TRACK OUT TO ROAD RIGHT OF WAY DOES NOT OCCUR FOR THE DURATION OF THE PROJECT. 5.THE ESC FACILITIES SHOWN ON THIS PLAN MUST BE CONSTRUCTED PRIOR TO OR IN CONJUNCTION WITH ALL CLEARING AND GRADING SO AS TO ENSURE THAT THE TRANSPORT OF SEDIMENT TO SURFACE WATERS, DRAINAGE SYSTEMS, FLOW CONTROL BMP LOCATIONS (EXISTING AND PROPOSED), AND ADJACENT PROPERTIES IS MINIMIZED. 6.THE ESC FACILITIES SHOWN ON THIS PLAN ARE THE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD, THESE ESC FACILITIES SHALL BE UPGRADED AS NEEDED FOR UNEXPECTED STORM EVENTS AND MODIFIED TO ACCOUNT FOR CHANGING SITE CONDITIONS (E.G. ADDITIONAL COVER MEASURES, ADDITIONAL SUMP PUMPS, RELOCATION OF DITCHES AND SILT FENCES, PERIMETER PROTECTION ETC.). 7.THE ESC FACILITIES SHALL BE INSPECTED DAILY BY THE APPLICANT/ESC SUPERVISOR AND MAINTAINED TO ENSURE CONTINUED PROPER FUNCTIONING. WRITTEN RECORDS SHALL BE KEPT OF WEEKLY REVIEWS OF THE ESC FACILITIES. 8.ANY AREAS OF EXPOSED SOILS, INCLUDING ROADWAY EMBANKMENTS, THAT WILL NOT BE DISTURBED FOR TWO DAYS DURING THE WET SEASON OR SEVEN DAYS DURING THE DRY SEASON SHALL BE IMMEDIATELY STABILIZED WITH THE APPROVED ESC COVER METHODS (E.G., SEEDING, MULCHING, PLASTIC COVERING, ETC.). 9.ANY AREA NEEDING ESC MEASURES, NOT REQUIRING IMMEDIATE ATTENTION, SHALL BE ADDRESSED WITHIN SEVEN (7) DAYS. 10.THE ESC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A MINIMUM OF ONCE A MONTH (MORE FREQUENTLY AS REQUIRED BY THE DLS-PERMITTING SITE INSPECTOR) OR WITHIN 24 HOURS FOLLOWING A STORM EVENT. 11.AT NO TIME SHALL MORE THAN ONE (1) FOOT OF SEDIMENT BE ALLOWED TO ACCUMULATE WITHIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO PAVING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT-LADEN WATER INTO THE DOWNSTREAM SYSTEM. 12.ANY PERMANENT RETENTION/DETENTION FACILITY USED AS A TEMPORARY SETTLING BASIN SHALL BE MODIFIED WITH THE NECESSARY EROSION CONTROL MEASURES AND SHALL PROVIDE ADEQUATE STORAGE CAPACITY. IF THE PERMANENT FACILITY IS TO FUNCTION ULTIMATELY AS AN INFILTRATION SYSTEM, THE TEMPORARY FACILITY MUST BE ROUGH GRADED SO THAT THE BOTTOM AND SIDES ARE AT LEAST THREE FEET ABOVE THE FINAL GRADE OF THE PERMANENT FACILITY. FLOW CONTROL BMP FACILITY AREAS (EXISTING OR PROPOSED) SHALL NOT BE USED AS TEMPORARY FACILITIES AND SHALL BE PROTECTED FROM SEDIMENTATION AND INTRUSION. 13.COVER MEASURES WILL BE APPLIED IN CONFORMANCE WITH APPENDIX D OF THE KING COUNTY SURFACE WATER DESIGN MANUAL. 14.PRIOR TO THE BEGINNING OF THE WET SEASON (OCT. 1), ALL DISTURBED AREAS SHALL BE REVIEWED TO IDENTIFY WHICH ONES CAN BE SEEDED IN PREPARATION FOR THE WINTER RAINS. DISTURBED AREAS SHALL BE SEEDED WITHIN ONE WEEK OF THE BEGINNING OF THE WET SEASON. A SKETCH MAP OF THOSE AREAS TO BE SEEDED AND THOSE AREAS TO REMAIN UNCOVERED SHALL BE SUBMITTED TO THE DLS-PERMITTING INSPECTOR FOR REVIEW. EROSION AND SEDIMENT CONTROL NOTES (1)PRE-CONSTRUCTION MEETING. (2)POST SIGN WITH NAME AND PHONE NUMBER OF CSWPP/ESC SUPERVISOR (MAY BE CONSOLIDATED WITH THE REQUIRED NOTICE OF CONSTRUCTION SIGN). (3)FLAG OR FENCE CLEARING LIMITS. (4)INSTALL FLOW CONTROL BMP AREA PROTECTION AS REQUIRED. (5)INSTALL PERIMETER PROTECTION. (6)CONSTRUCT SURFACE WATER CONTROLS SIMULTANEOUSLY WITH CLEARING AND GRADING FOR PROJECT DEVELOPMENT. CONSTRUCT SWPPS CONTROLS IN ANTICIPATION OF SCHEDULED CONSTRUCTION ACTIVITY. (7)MAINTAIN EROSION CONTROL AND SWPPS MEASURES IN ACCORDANCE WITH KING COUNTY STANDARDS AND MANUFACTURER'S RECOMMENDATIONS. (8)RELOCATE EROSION CONTROL AND SWPPS MEASURES OR INSTALL NEW MEASURES SO THAT AS SITE CONDITIONS CHANGE THE EROSION AND SEDIMENT CONTROL AND POLLUTANT PROTECTION IS ALWAYS IN ACCORDANCE WITH THE KING COUNTY CONSTRUCTION STORMWATER POLLUTION PREVENTION STANDARDS. (9)COVER ALL AREAS THAT WILL BE UNWORKED FOR MORE THAN SEVEN DAYS DURING THE DRY SEASON OR TWO DAYS DURING THE WET SEASON WITH STRAW, WOOD FIBER MULCH, COMPOST, OR EQUIVALENT. (10)STABILIZE ALL AREAS THAT REACH FINAL GRADE WITHIN SEVEN DAYS. (11)SEED OR SOD ANY AREAS TO REMAIN UNWORKED FOR MORE THAN 30 DAYS. (12)UPON COMPLETION OF THE PROJECT, ALL DISTURBED AREAS MUST BE STABILIZED AND BMPS REMOVED IF APPROPRIATE. CONSTRUCTION STORMWATER POLLUTION PREVENTION RECOMMENDED CONSTRUCTION SEQUENCE 08/08/2024 King County DLS - Permitting Approval Review Engineer Date Senior Engineer Date Development Engineer Date ROWP23-0016 ROWP23-0016 Sheet 2 of 4 8-29-2024 8/29/2024 65+0066+0067+0068+0069+00 380 377378379 3773783 79 376 377 375376 EG: 375.90 EG: 376.61 EG: 376.39 EG: 376.98 EG: 376.48 PROTECT EXISTING WOOD EDGE BARRIERS (TYP.) PROTECT EXISTING WOOD EDGE BARRIERS (TYP.) EG: 377.18 385382383384384384385383384PROTECT EXISTING UTILITIES (TYP.) PROTECT EXISTING UTILITIES (TYP.) EG: 380.40 ROAD RESTORATION PER CITY OF RENTON PERMIT PROTECT EXISTING UTILITIES (TYP.) EG: 378.59 EG: 381.00 A C2.1 B C2.1 C C2.1 EG: 377.99EG: 379.30 EG: 377.79 EG: 375.85 EG: 379.08 377 378 379 376370 375 380 370 375 380 0+00FG FG0+50FG 374.77FG154TH AVE SE ROW 154TH AVE SE ROW 154TH AVE SE CENTERLINE EXISTING EDGE OF GRAVEL ROADWAY EXISTING GRADE AT CROSS SECTION EXISTING GRADE AT CROSS SECTION FINISHED GRADE AT CROSS SECTION DITCH WIDTH VARIES 11.16' 30.00'30.00' FINISHED GRADE AT CROSS SECTION 1 C2.22H:1V3 APPROXIMATE HEDGE LIMITS. PROTECT HEDGES. 370 375 380 370 375 380 0+00FG FG 375.69154TH AVE SE ROW 154TH AVE SE ROW 154TH AVE SE CENTERLINE 30.00'30.00' FINISHED GRADE AT CROSS SECTION DITCH10.5'± EXISTING GRADE AT CROSS SECTION EXISTING GRADE AT CROSS SECTION EXISTING EDGE OF GRAVEL ROADWAY 12.73' 1 C2.22H:1V3 APPROXIMATE HEDGE LIMITS. PROTECT HEDGES. FINISHED GRADE AT CROSS SECTION370 375 380 370 375 380 0+00FG FG 376.860+50FG154TH AVE SE ROW 154TH AVE SE CENTERLINE 30.00' 154TH AVE SE ROW 30.00' FINISHED GRADE AT CROSS SECTION DITCHWIDTH VARIES EXISTING GRADE AT CROSS SECTION EXISTING GRADE AT CROSS SECTION FINISHED GRADE AT CROSS SECTION EXISTING EDGE OF GRAVEL ROADWAY 13.42' 1 C2.24H:1V2H:1V2.00' 1 2 3 4 TEL www.ahbl.comWEBTELwww.ahbl.comWEBTELwww.ahbl.comWEB 2215 North 30th Street, Suite 300 Tacoma, WA 98403 253.383.2422TEL www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES Know what's below. before you dig.Call R 253.383.2572 FAX 4 SK/MWGBRI/JT REVISED PER KC COMMENTS DATED 11/9/23 REVISED PER KC COMMENTS DATED 1/4/24 REVISED PER KC COMMENTS DATED 6/28/24 7/22/2024 154TH AVE SE DITCH IMPROVEMENTS PERMIT SET 2221005.10 12600 SE 38TH STREET BELLEVUE, WA 98006 CONTACT: DALTON SMITH PHONE: (888)302-1252 CONNER HOMES MAPLE HIGHLANDS 154TH AVE SE DITCH IMPROVEMENTS SW 1/4, SEC 14, TWN 23, RGE 5, KING COUNTY MAPLE HIGHLANDS - 154TH AVE SE DITCH IMPROVEMENTS 154TH AVE SE NGRAPHIC SCALE 0 20 40 1" = 20 FEET 10 DATE: July 22, 2024 FILENAME: Q:\2022\2221005\10_CIV\CAD\_King County ROW\2221005-SH-154TH AVE SE DITCH.dwg C2.1 3 154TH AVE SE DITCH PLAN & PROFILE MAX 2:1 DITCH SIDE SLOPE ADJACENT TO YARDS. MAX. 4:1 DITCH SIDE SLOPES ADJACENT TO ROADSIDE. MAINTAIN EXISTING DITCH SIDE SLOPE ALONG ROADSIDE. PROTECT CULVERT INLET/OUTLET. CUT BACK 6" ROOF DRAIN PIPE TO EDGE OF WIDENED DITCH. MAINTAIN EXISTING DISCHARGE. DITCH TOE. WHITE DELINEATORS. 4' FLEXIBLE GUIDE POST WITH REFLECTIVE BANDS, GROUND MOUNTED. 1 2 3 4 5 6 7 KEYNOTES 1 2 3 1 1 3 4 4 4 6 6 6 7 A SCALE; H:1" = 20', V:1" = 2 DITCH SECTION A B SCALE; H:1" = 20', V:1" = 2 DITCH SECTION B C SCALE; H:1" = 20', V:1" = 2 DITCH SECTION C 4 57 7 08/08/2024 King County DLS - Permitting Approval Review Engineer Date Senior Engineer Date Development Engineer Date ROWP23-0016 ROWP23-0016 Sheet 3 of 4 8-29-2024 8/29/2024 1 2 3 4 TEL www.ahbl.comWEBTELwww.ahbl.comWEBTELwww.ahbl.comWEB 2215 North 30th Street, Suite 300 Tacoma, WA 98403 253.383.2422TEL www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES Know what's below. before you dig.Call R 253.383.2572 FAX 4 SK/MWGBRI/JT REVISED PER KC COMMENTS DATED 11/9/23 REVISED PER KC COMMENTS DATED 1/4/24 REVISED PER KC COMMENTS DATED 6/28/24 7/22/2024 154TH AVE SE DITCH IMPROVEMENTS PERMIT SET 2221005.10 12600 SE 38TH STREET BELLEVUE, WA 98006 CONTACT: DALTON SMITH PHONE: (888)302-1252 CONNER HOMES MAPLE HIGHLANDS 154TH AVE SE DITCH IMPROVEMENTS SW 1/4, SEC 14, TWN 23, RGE 5, KING COUNTY MAPLE HIGHLANDS - 154TH AVE SE DITCH IMPROVEMENTS DATE: July 22, 2024 FILENAME: Q:\2022\2221005\10_CIV\CAD\_King County ROW\2221005-SH-154TH AVE SE DITCH.dwg C2.2 4 DITCH NOTES AND DETAILSMAX. 4H:1VADJACENT TORO A DW A Y WIDTH VARIES PER PLAN HEIGHT PER PLAN MAX. 2H:1V18" LINER*NATIVE SOIL * IMPORTED SOIL COMPACTED TILL LINER SHALL MEET THE FOLLOWING SPECIFICATIONS: 1.LINER THICKNESS SHALL BE 18 INCHES AFTER COMPACTION. 2.SOIL SHALL BE COMPACTED TO 95% MINIMUM DRY DENSITY, MODIFIED PROCTOR METHOD (ASTM D-1557). 3.SOIL SHOULD BE PLACED IN 6 INCH LIFTS. 4.SOILS MAY BE USED THAT MEET THE FOLLOWING GRADATION: SIEVE SIZE PERCENT PASSING 6 INCH 100 4 INCH 90 #4 70 - 100 #200 30 - 100 (1)ALL DESIGN AND CONSTRUCTION SHALL BE IN ACCORDANCE WITH PERMIT CONDITIONS, THE KING COUNTY CODE (KCC), THE KING COUNTY ROAD DESIGN AND CONSTRUCTION STANDARDS (KCRDCS), WASHINGTON STATE DOT (WSDOT) STANDARD SPECIFICATIONS AND THE CONDITIONS OF PRELIMINARY APPROVAL. IT SHALL BE THE SOLE RESPONSIBILITY OF THE APPLICANT AND THE PROFESSIONAL CIVIL ENGINEER TO CORRECT ANY ERROR, OMISSION, OR VARIATION FROM THE ABOVE REQUIREMENTS FOUND IN THESE PLANS. ALL CORRECTIONS SHALL BE AT NO ADDITIONAL COST OR LIABILITY TO KING COUNTY. (2)THE DESIGN ELEMENTS WITHIN THESE PLANS HAVE BEEN REVIEWED ACCORDING TO THE KING COUNTY DEPARTMENT OF LOCAL SERVICES, PERMITTING DIVISION(DLS-PERMITTING) ENGINEERING REVIEW CHECKLIST. SOME ELEMENTS MAY HAVE BEEN OVERLOOKED OR MISSED BY THE DLS-PERMITTING PLAN REVIEWER. ANY VARIANCE FROM ADOPTED STANDARDS IS NOT ALLOWED UNLESS SPECIFICALLY APPROVED BY KING COUNTY PRIOR TO CONSTRUCTION. (3)APPROVAL OF THIS ROAD, GRADING, PARKING AND DRAINAGE PLAN DOES NOT CONSTITUTE AN APPROVAL OF ANY OTHER CONSTRUCTION (E.G. DOMESTIC WATER CONVEYANCE, SEWER CONVEYANCE, GAS, ELECTRICAL, ETC.) (4)BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY, A PRECONSTRUCTION MEETING MUST BE HELD BETWEEN THE DLS[1]PERMITTING'S DEVELOPMENT INSPECTOR, THE APPLICANT, AND THE APPLICANT'S CONSTRUCTION REPRESENTATIVE. (5)A COPY OF THESE APPROVED PLANS MUST BE ON THE JOB SITE WHENEVER CONSTRUCTION IS IN PROGRESS. (6)GRADING ACTIVITIES (SITE ALTERATION) ARE LIMITED TO THE HOURS OF 7 A.M. TO 7 P.M. MONDAY THROUGH SATURDAY AND 10 A.M. TO 5 P.M. ON SUNDAY, UNLESS OTHERWISE APPROVED WITH A WRITTEN DECISION BY THE REVIEWING AGENCY. (7)IT SHALL BE THE APPLICANT'S/CONTRACTOR'S RESPONSIBILITY TO OBTAIN ALL CONSTRUCTION EASEMENTS NECESSARY BEFORE INITIATING OFF-SITE WORK. EASEMENTS REQUIRE REVIEW AND APPROVAL PRIOR TO CONSTRUCTION. (8)FRANCHISED UTILITIES OR OTHER INSTALLATIONS THAT ARE NOT SHOWN ON THESE APPROVED PLANS SHALL NOT BE CONSTRUCTED UNLESS AN APPROVED SET OF PLANS THAT MEET ALL REQUIREMENTS OF KCRDCS CHAPTER 8 ARE SUBMITTED TO THE DLS-PERMITTING'S DEVELOPMENT INSPECTOR THREE DAYS PRIOR TO CONSTRUCTION. (9)DATUM SHALL BE NAVD88 UNLESS OTHERWISE APPROVED BY DLS-PERMITTING. (10)DEWATERING SYSTEM (UNDERDRAIN) CONSTRUCTION SHALL BE WITHIN A RIGHT-OF-WAY OR APPROPRIATE DRAINAGE EASEMENT, BUT NOT UNDERNEATH THE ROADWAY SECTION. ALL UNDERDRAIN SYSTEMS MUST BE CONSTRUCTED IN ACCORDANCE WITH WSDOT STANDARD SPECIFICATIONS. (11)ALL UTILITY TRENCHES AND ROADWAY SUBGRADE SHALL BE BACKFILLED AND COMPACTED TO 95 PERCENT MAXIMUM DENSITY PER WSDOT STANDARD SPECIFICATIONS 2-03.3(14)D, METHOD C. (12)OPEN CUTTING OF EXISTING ROADWAYS FOR NON-FRANCHISED UTILITY OR STORM WORK IS NOT ALLOWED UNLESS SPECIFICALLY APPROVED BY DLS-PERMITTING AND NOTED ON THESE APPROVED PLANS. ANY OPEN CUT SHALL BE RESTORED IN ACCORDANCE WITH KCRDCS. (13)THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROVIDING ADEQUATE SAFEGUARDS, SAFETY DEVICES, PROTECTIVE EQUIPMENT, FLAGGERS, AND ANY OTHER NEEDED ACTIONS TO PROTECT THE LIFE, HEALTH, AND SAFETY OF THE PUBLIC, AND TO PROTECT PROPERTY IN CONNECTION WITH THE PERFORMANCE OF WORK COVERED BY THE CONTRACTOR. ANY WORK WITHIN THE TRAVELED RIGHT-OF-WAY THAT MAY INTERRUPT NORMAL TRAFFIC FLOW SHALL REQUIRE AT LEAST ONE FLAGGER FOR EACH LANE OF TRAFFIC AFFECTED. MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES (MUTCD) SHALL APPLY. WORK IN RIGHT-OF-WAY IS NOT AUTHORIZED UNTIL A TRAFFIC CONTROL PLAN IS APPROVED BY KING COUNTY. GENERAL NOTES (1)PROOF OF LIABILITY INSURANCE SHALL BE SUBMITTED TO DLS-PERMITTING PRIOR TO THE CONSTRUCTION OF THE DRAINAGE FACILITIES, PREFERABLY AT THE PRECONSTRUCTION MEETING. (2)ALL PIPE AND APPURTENANCES SHALL BE LAID ON A PROPERLY PREPARED FOUNDATION IN ACCORDANCE WITH WSDOT SPECIFICATIONS. THIS SHALL INCLUDE LEVELING AND COMPACTING THE TRENCH BOTTOM, THE TOP OF THE FOUNDATION MATERIAL, AND ANY REQUIRED PIPE BEDDING, TO A UNIFORM GRADE SO THAT THE ENTIRE PIPE IS SUPPORTED BY A UNIFORMLY DENSE UNYIELDING BASE. (3)STEEL PIPE SHALL BE ALUMINIZED, OR GALVANIZED WITH ASPHALT TREATMENT #1 OR BETTER INSIDE AND OUTSIDE. (4)ALL DRAINAGE STRUCTURES, SUCH AS CATCH BASINS AND MANHOLES, NOT LOCATED WITHIN A TRAVELED ROADWAY OR SIDEWALK, SHALL HAVE SOLID LOCKING LIDS. ALL DRAINAGE STRUCTURES ASSOCIATED WITH A PERMANENT RETENTION/DETENTION FACILITY SHALL HAVE SOLID LOCKING LIDS. (5)ALL CATCH BASIN GRATES SHALL CONFORM TO KCRDCS, WHICH INCLUDES THE STAMPING "OUTFALL TO STREAM, DUMP NO POLLUTANTS" AND "PROPERTY OF KING COUNTY", EXCEPT THAT PRIVATE DRAINAGE SYSTEMS SHALL NOT HAVE THE WORDS “PROPERTY OF KING COUNTY”. (6)ALL DRIVEWAY CULVERTS LOCATED WITHIN KING COUNTY RIGHT-OF-WAY SHALL BE OF SUFFICIENT LENGTH TO PROVIDE A MINIMUM 3:1 SLOPE FROM THE EDGE OF THE DRIVEWAY TO THE BOTTOM OF THE DITCH. CULVERTS SHALL HAVE BEVELED END SECTIONS TO MATCH THE SIDE SLOPE PER KCRDCS. (7)ROCK FOR EROSION PROTECTION OF ROADWAY DITCHES, WHERE REQUIRED, MUST BE OF SOUND QUARRY ROCK, PLACED TO A DEPTH OF 1 FOOT, AND MUST MEET THE FOLLOWING SPECIFICATIONS: 4"-8" ROCK/40%-70% PASSING; 2"-4" ROCK/30%-40% PASSING; AND 2" ROCK/10%-20% PASSING. INSTALLATION SHALL BE IN ACCORDANCE WITH KCRDCS. (8)DRAINAGE OUTLETS (STUB-OUTS) SHALL BE PROVIDED FOR EACH INDIVIDUAL LOT, EXCEPT FOR THOSE LOTS APPROVED FOR INFILTRATION BY KING COUNTY. STUB-OUTS SHALL CONFORM TO THE FOLLOWING: a)EACH OUTLET SHALL BE SUITABLY LOCATED AT THE LOWEST ELEVATION ON THE LOT, SO AS TO SERVICE ALL FUTURE ROOF DOWNSPOUTS AND FOOTING DRAINS, DRIVEWAYS, YARD DRAINS, AND ANY OTHER SURFACE OR SUBSURFACE DRAINS NECESSARY TO RENDER THE LOTS SUITABLE FOR THEIR INTENDED USE. EACH OUTLET SHALL HAVE FREE-FLOWING, POSITIVE DRAINAGE TO AN APPROVED STORMWATER CONVEYANCE SYSTEM OR TO AN APPROVED OUTFALL LOCATION. b)OUTLETS ON EACH LOT SHALL BE LOCATED WITH A FIVE-FOOT-HIGH, 2" X 4" STAKE MARKED "STORM" OR "DRAIN". THE STUB-OUT SHALL EXTEND ABOVE SURFACE LEVEL, BE VISIBLE, AND BE SECURED TO THE STAKE. c)PIPE MATERIAL SHALL CONFORM TO UNDERDRAIN SPECIFICATIONS DESCRIBED IN KCRDCS AND, IF NON-METALLIC, THE PIPE SHALL CONTAIN WIRE OR OTHER ACCEPTABLE DETECTION. d)DRAINAGE EASEMENTS ARE REQUIRED FOR DRAINAGE SYSTEMS DESIGNED TO CONVEY FLOWS THROUGH INDIVIDUAL LOTS. e)THE APPLICANT/CONTRACTOR IS RESPONSIBLE FOR COORDINATING THE LOCATIONS OF ALL STUB-OUT CONVEYANCE LINES WITH RESPECT TO THE UTILITIES (E.G. POWER, GAS, TELEPHONE, TELEVISION). f)ALL INDIVIDUAL STUB-OUTS SHALL BE PRIVATELY OWNED AND MAINTAINED BY THE LOT HOME OWNER. (9)ALL DISTURBED PERVIOUS AREAS (COMPACTED, GRADED, LANDSCAPED, ETC.) OF THE DEVELOPMENT SITE MUST DEMONSTRATE ONE OF THE FOLLOWING, IN ACCORDANCE WITH KCC AND THE LOW IMPACT DEVELOPMENT (LID) COMPONENTS OF THE APPROVED SITE PLAN: THE EXISTING DUFF LAYER SHALL BE STAGED AND REDISTRIBUTED TO MAINTAIN THE MOISTURE CAPACITY OF THE SOIL, OR; AMENDED SOIL SHALL BE ADDED TO MAINTAIN THE MOISTURE CAPACITY. (10)SEASONAL CLEARING IS LIMITED BETWEEN OCTOBER 1 AND APRIL 30 INCLUSIVE, UNLESS OTHERWISE APPROVED WITH A WRITTEN DECISION BY THE REVIEWING AGENCY. (11)IMPROVEMENTS AND/OR BUILDINGS SHALL NOT BE INSTALLED UNTIL DRAINAGE FACILITIES ARE “IN OPERATION”, (KCC 9.04). DRAINAGE NOTES 1 NOT TO SCALE DITCH ROADSIDE PROPERTY SIDE 08/08/2024 King County DLS - Permitting Approval Review Engineer Date Senior Engineer Date Development Engineer Date ROWP23-0016 ROWP23-0016 Sheet 4 of 4 8-29-2024 8/29/2024