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HomeMy WebLinkAboutR-383528CONSTRUCTION PROVISIONS 1. STANDARD SPECIFICATIONS THE PROJECT IS TO BE BUILT AND CONSTRUCTED IN ACCORDANCE WITH THE "2012 STANDARD SPECIFICATIONS FOR ROAD, BRIDGE, AND MUNICIPAL CONSTRUCTION," PREPARED JOINTLY BY THE WASHINGTON STATE DEPARTMENT OF TRANSPORTATION AND THE WASHINGTON STATE CHAPTER OF THE AMERICAN PUBLIC WORKS ASSOCIATION AS AMENDED REGULARLY BY THE WASHINGTON STATE DEPARTMENT OF TRANSPORTATION, AND HEREINAFTER REFERRED TO AS THE "STANDARD SPECIFICATIONS," EXCEPT WHERE HEREIN SUPPLEMENTED OR MODIFIED IN THESE DOCUMENTS. IMPROVEMENTS IN KING COUNTY RIGHT-OF-WAY SHALL ALSO CONFORM TO THE LATEST REVISION OF THE KING COUNTY ROAD STANDARDS, IN CASES OF CONFLICT THE FOLLOWING SUPPLEMENTS AND MODIFICATIONS SUPERSEDE THE STANDARD SPECIFICATIONS. 2. TRAFFIC MAINTENANCE AND PROTECTION ALL WORK SHALL BE PERFORMED WITH DUE REGARD FOR THE SAFETY AND CONVENIENCE OF THE PUBLIC AND SO THAT INTERFERENCE WITH AUTOMOTIVE AND PEDESTRIAN TRAFFIC WILL BE MINIMIZED. FLAGGING PERSONNEL, BARRICADES, SIGNS AND TRAFFIC CONTROL FURNISHED OR PROVIDED SHALL CONFORM TO THE STANDARDS ESTABLISHED IN THE LATEST EDITION OF THE MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES. ALL FLAGGERS SHALL BE CERTIFIED AND CARRY IN THEIR POSSESSION A CARD THAT VERIFIES THEY HAVE SUCCESSFULLY COMPLETED TRAINING TO BECOME A CERTIFIED FLAGGER. THE DISTRICT MAY REQUIRE THE CONSTRUCTION OF TWO-WAY BRIDGES OF APPROVED CONSTRUCTION ON STREETS WITH HIGH TRAFFIC VOLUME. WHERE DETOURS ARE BUILT, THEY SHALL BE GRADED AND MAINTAINED TO THE SATISFACTION OF THE DISTRICT. WHERE CONSTRUCTION HAS BEEN COMPLETED OR IS IN PROGRESS IN EXISTING STREETS, THE STREETS SHALL BE GRADED AND MAINTAINED TO THE SATISFACTION OF THE DISTRICT. NO DETOURS FOR FOOT TRAFFIC SHALL BE MORE THAN ONE BLOCK IN LENGTH AND WHERE CROSSING TRENCHES, DETOURS SHALL BE PROVIDED WITH ADEQUATE FOOTBRIDGES WITH HANDRAILS. AT LEAST ONE HALF OF EXISTING STREETS SHALL BE LEFT OPEN FOR TRAFFIC AND EMERGENCY VEHICLES AT ALL TIMES. 3. CONFINEMENT OF CONTRACTOR'S OPERATIONS THE CONTRACTOR SHALL CONFINE CONSTRUCTION ACTIVITIES WITHIN THE PROPERTY OF THE DEVELOPER AND THE LIMITS OF EASEMENTS AND CONSTRUCTION/RIGHT-OF-WAY PERMITS OUTSIDE OF THE DEVELOPER'S PROPERTY. ALL WORK ON EASEMENTS AND PERMIT AREAS OUTSIDE THE DEVELOPER'S PROPERTY SHALL BE PERFORMED IN STRICT COMPLIANCE WITH THE PROVISIONS OF THE EASEMENT OR PERMIT. ANY DAMAGE TO PROPERTY OR PERSONS FROM ANY ENCROACHMENT BEYOND THESE LIMITS SHALL BE THE RESPONSIBILITY OF THE DEVELOPER. EQUIPMENT AND MATERIALS STORAGE SHALL BE CONFINED TO THE DEVELOPER'S PROPERTY. PIPE STRUNG ON PUBLIC RIGHTS-OF-WAY SHALL BE PLACED A SAFE DISTANCE FROM ANY TRAVELED ROAD IN SUCH MANNER AS TO AVOID ACCIDENTAL ROLLING ONTO THE ROAD. NO DRIVEWAYS SHALL BE BLOCKED. LIGHTED BARRICADES IN AN ADEQUATE NUMBER AND LOCATION PURSUANT TO STATE, COUNTY AND LOCAL REGULATIONS SHALL BE PROVIDED. 4. PLANS AND SPECIFICATIONS ACCESSIBLE THE DEVELOPER/CONTRACTOR SHALL HAVE ONE COPY OF THE PLANS AND SPECIFICATIONS CONSTANTLY ACCESSIBLE ON THE JOB. 5. TRENCH EXCAVATION, FOUNDATION BEDDING AND BACKFILL THE CONTRACTOR SHALL EXCAVATE ALL MATERIALS ENCOUNTERED TO THE DEPTH SHOWN ON THE DRAWINGS AS SPECIFIED, OR AS DIRECTED BY THE ENGINEER. THE TRENCH SHALL BE OVER -EXCAVATED 6 -INCHES BELOW THE SPECIFIED GRADE. THE CONTRACTOR SHALL THEN FURNISH AND PLACE A LAYER OF PIPE BEDDING MATERIAL PER SECTION 7-08.3(1)C OF THE STANDARD SPECIFICATIONS. AFTER THE PIPE IS IN PLACE, ADDITIONAL BEDDING MATERIAL SHALL BE PLACED AND TAMPED IN PLACE AROUND THE PIPE UP TO A POINT 1 -FOOT ABOVE THE TOP OF PIPE. PIPE BEDDING MATERIAL SHALL BE 5/8" MINUS CRUSHED SURFACING TOP COURSE. WHERE THE TRENCH BOTTOM IS IN A MATERIAL WHICH IS UNSUITABLE FOR FOUNDATION, OR MATERIAL WHICH WILL MAKE IT DIFFICULT TO OBTAIN UNIFORM BEARING FOR THE PIPE, SUCH MATERIAL SHALL BE REMOVED AND A STABLE FOUNDATION PROVIDED IN ACCORDANCE WITH PARAGRAPH 7-09.3(8) OF THE STANDARD SPECIFICATIONS. IN AREAS OUTSIDE OF PAVED SURFACES OR ROW AREAS, THE PORTION OF THE BACKFILL ABOVE THE POINT 1 -FOOT FROM THE TOP OF THE PIPE SHALL BE SUITABLE NATIVE BACKFILL OR FINELY DIVIDED EARTH, FREE FROM STONES LARGER THAN 2 -INCHES IN DIAMETER. THE MATERIAL SHALL BE CARRIED UP EVENLY ON BOTH SIDES OF THE PIPE SIMULTANEOUSLY IN APPROXIMATELY 6 -INCH LAYERS, AND EACH LAYER THOROUGHLY COMPACTED WITH APPROPRIATE TOOLS IN SUCH MANNER AS TO AVOID INJURING OR DISTURBING THE COMPLETED PIPELINE. ALL TRENCHES WITHIN THE RIGHT OF WAY OR UNDER PAVED SURFACES SHALL BE BACKFILLED USING 100% CRUSHED SURFACING TOP COURSE OR CRUSHED SURFACING BASE COURSE AS REQUIRED BY THE GOVERNING AGENCY. AT THE TIME OF COMPLETION OF BACKFILL AND COMPACTION, ALL TRENCH BACKFILL WITHIN THE RIGHT -OF --WAY SHALL BE MECHANICALLY COMPACTED TO 95% OF MAXIMUM DENSITY PER MODIFIED PROCTOR, ANY TRANSVERSE OPEN CUT WITHIN RIGHT-OF-WAY SHALL BE BACKFILLED ENTIRELY WITH 1i -CRUSHED SURFACING BASE COURSE, AS SPECIFIED IN SECTION 9-03.9(3) OF THE STANDARD SPECIFICATIONS, EXCEPT FOR SERVICES. BACKFILL WITH PEA GRAVEL OR SAND 6 INCHES BELOW AND 6 INCHES ON TOP OF THE SERVICE PIPE, THEN BACKFILL THE REST OF THE TRENCH WITH 1j" CRUSHED SURFACING BASE COURSE. BACKFILL COMPACTION ON PRIVATE EASEMENTS WHICH ARE NOT USED FOR DRIVING PURPOSES SHALL BE MECHANICALLY COMPACTED TO 90% OF MAXIMUM DENSITY PER MODIFIED PROCTOR. C. COVER OVER PIPELINES MAINS SHALL BE INSTALLED WITH A MINIMUM DEPTH OF COVER OF 36 -INCHES FOR 8 --INCH DIAMETER AND SMALLER MAINS AND 48 -INCHES FOR MAINS OVER 8 -INCHES IN DIAMETER. EXCEPTIONS WILL BE ALLOWED ONLY WITH THE PRIOR APPROVAL OF THE ENGINEER. MINIMUM SEPARATION BETWEEN WATER AND SEWER SHALL BE 18 -INCHES. MINIMUM SEPARATION BETWEEN ALL OTHER UTILITIES AND OTHER WATER MAINS SHALL BE 6 -INCHES WITH SAND CUSHION. 7. WATER METER LOCATIONS WATER SERVICES SHALL BE LOCATED AT LEAST 5 -FEET FROM POWER VAULTS, HAND HOLES, AND/OR LIGHT STANDARDS. 8. CONNECTION TO EXISTING WATER MAINS CONTRACTOR SHALL LEAVE EXISTING WATER LINES IN SERVICE UNTIL ACCEPTANCE OF THE NEW WATER LINES. THE CONTRACTOR SHALL NOTIFY THE WATER DISTRICT OPERATIONS MANAGER AND OTHER UTILITIES AT LEAST 48 HOURS (TWO WORKING DAYS) IN ADVANCE OF ANY CONSTRUCTION AND MAKE THE NECESSARY ARRANGEMENTS WITH THE WATER DISTRICT OPERATIONS MANAGER FOR THE CONNECTION TO THE EXISTING WATER MAIN. THE CONTRACTOR SHALL NOT OPERATE ANY GATE VALVE OF THE WATER SYSTEM BEFORE OR DURING CONSTRUCTION WITHOUT PRIOR APPROVAL OF THE WATER DISTRICT. THE WATER DISTRICT OPERATIONS MANAGER MAY ELECT TO FURNISH THE MATERIAL, EQUIPMENT, AND LABOR NECESSARY FOR MAKING THE CONNECTION AND THE CONTRACTOR SHALL PAY THE WATER DISTRICT ALL COSTS FOR THE CONNECTION. IN THE EVENT THE WATER DISTRICT OPERATIONS MANAGER DOES NOT ELECT TO MAKE THE CONNECTION, HE MAY AUTHORIZE THE CONTRACTOR TO FURNISH THE MATERIALS, EQUIPMENT AND LABOR NECESSARY FOR MAKING THE CONNECTION UNDER THE SUPERVISION OF THE WATER DISTRICT. WORK SHALL NOT BE STARTED UNTIL ALL OF THE MATERIALS, EQUIPMENT, AND LABOR NECESSARY TO PROPERLY COMPLETE WORK ARE ASSEMBLED ON THE SITE. ONCE WORK HAS STARTED ON A CONNECTION, IT SHALL PROCEED CONTINUOUSLY WITHOUT INTERRUPTION AND AS RAPIDLY AS POSSIBLE UNTIL COMPLETED. EXISTING MAINS SHALL BE THOROUGHLY CLEANED PRIOR TO CONNECTIONS. STEEL MAINS SHALL HAVE EXTERIOR COATINGS REMOVED PRIOR TO GASKET INSTALLATION. UPON COMPLETION, ALL EXPOSED METAL SURFACES SHALL BE RECOATED WITH VERSIL-PAK, GRADE 3 PROTECTIVE WRAPPING, OR APPROVED EQUIVALENT FOR CORROSION PROTECTION. 9. BLOCKING ALL FITTINGS ARE TO BE BLOCKED WITH POURED CONCRETE AGAINST UNDISTURBED SOIL WITH SUFFICIENT CONCRETE AND 3/4 -INCH ANCHOR RODS, IF REQUIRED, TO RESIST THE RESULTANT FORCES. BLOCKING SHALL PROVIDE FOR REMOVAL OF ANY CONNECTION TO THE FITTING WITHOUT DAMAGE TO THE FITTING. WHERE UNFAVORABLE GROUND CONDITIONS ARE ENCOUNTERED, SPECIAL BLOCKING WILL BE REQUIRED AS DIRECTED BY THE ENGINEER IN THE FIELD. WHEN DIGGING NEAR FITTINGS OF EXISTING PIPELINES, TEMPORARY WOOD BLOCKING SHALL BE INSTALLED TO PREVENT BLOWOUTS. SEE STANDARD DETAILS FOR THRUST BLOCKING DETAILS. THE USE OF MANUFACTURED CONCRETE ANCHORS IS ACCEPTABLE. G) c m� m 10. WATERWORKS TESTING TESTING OF LINES SHALL BE IN ACCORDANCE WITH SECTION 7-11.3(11) AND (12)N ACCORDING TO THE STANDARD SPECIFICATIONS. MINIMUM TEST PRESSURE SHALL BE 250 PSI AT 15 MINUTES WITH NO BLEED OFF ALLOWED. DISINFECTION SHALL BE PER SECTION 7-11.3(12). DECHLORINATION SHALL BE WITH ASCORBIC ACID. SODIUM THIOSULFATE SHALL NOT BE ALLOWED. ` 0 11. REPAIR OF PIPELINE FAILURES a BROKEN OR OTHERWISE DEFECTIVE PIPE SHALL BE REMOVED AND REPLACED. REPAIR BANDS OR CLAMPS SHALL cUn NOT BE USED TO REPAIR BROKEN PIPE. Q 12. JACKED CROSSING w a AT LOCATIONS SHOWN ON THE PLANS, WATER MAIN CROSSINGS OF ARTERIAL STREETS SHALL BE MADE BY JACKING, DRIVING, OR AUGURING A STEEL CASING PIPE BENEATH THE SURFACE. STAKING REQUEST TO THE ENGINEER SHALL BE MADE A MINIMUM OF 5 WORKING DAYS PRIOR TO THE BEGINNING OF EXCAVATION OF THE BORE PIT. JACK CASING SHALL BE LAID AT THE SPECIFIED GRADE AND ALIGNMENT WHILE MAINTAINING CLEARANCE. IF CASING DOES NOT PROVIDE THIS IT SHALL BE ABANDONED, FILLED, AND A NEW CASING INSTALLED TO MEET THIS LINE AND GRADE REQUIREMENT. NO OPEN EXCAVATION SHALL BE MADE CLOSER THAN 6 -FEET FROM THE EDGE OF PAVEMENT. DIAMETER OF CASING PIPE SHALL BE SUFFICIENT TO WITHSTAND INSTALLATION FORCE AND HIGHWAY LOADING. IT SHALL NOT HAVE LESS THAN 1/4 -INCH WALL THICKNESS. AFTER THE WATER PIPE HAS BEEN ADJUSTED TO GRADE, MOIST SAND SHALL BE TAMPED INTO THE CASING PIPE SO THAT ALL VOIDS WILL BE FILLED, o AND THEN THE ENDS OF THE CASING SHALL BE SEALED WITH BRICK AND MORTAR. 13. WATER SUPPLY WATER SUPPLY FOR FILLING, TESTING, AND FLUSHING OF THE NEW MAINS WILL BE AVAILABLE FROM THE EXISTING DISTRIBUTION SYSTEM; HOWEVER THE CONTRACTOR WILL BE BILLED BY THE WATER DISTRICT FOR THE WATER f USED AT THE CURRENT BULK WATER RATE PER 100 CUBIC FEET. FIRE HYDRANT METER AND DOUBLE CHECK VALVE FOR T FILLING AND FLUSHING THE MAIN SHALL BE RENTED FROM THE DISTRICT OFFICE. THE CONTRACTOR SHALL BE RESPONSIBLE FOR FLUSHING THE PIPELINE AND SHALL FURNISH ALL LABOR, EQUIPMENT, AND MATERIALS NECESSARY TO ACCOMPLISH THE WORK. FLUSHING SHALL BE DONE UNDER THE - o SUPERVISION OF WATER DISTRICT NO. 90, WHOM THE CONTRACTOR SHALL NOTIFY NOT LESS THAN 24 HOURS +00 m IN ADVANCE. 1 WATER DISCHARGED DURING TESTING OR FLUSHING SHALL BE DECHLORINATED WITH ASCORBIC ACID. ug o N SODIUM THIOSULFATE IS NOT AN ACCEPTABLE REAGENT. y 14. EXISTING UTILITIES CD z 1 THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL EXISTING UTILITIES WELL ENOUGH IN ADVANCE OF p THE EXCAVATION TO PREVENT DAMAGE DURING CONSTRUCTION. THE CONTRACTOR SHALL BE RESPONSIBLE~ .� 00 w ,� FOR ANY DAMAGE WHATSOEVER RESULTING FROM HIS OPERATIONS ON THE PROJECT. 15. ZONE VALVE IF A ZONE VALVE IS CREATING A DEAD END ON BOTH SIDES THEN A BLOW OFF MUST BE ADDED ON BOTH SIDES OF THE ZONE VALVE. 18. DISINFECTION f 0 THE CONTRACTOR SHALL SWAB DOWN ALL PIPE AND FITTINGS WITH A BLEACH SOLUTION PRIOR TO INSTALLATION PER ` o AWWA C651.05. 1/4" CAP OF GRANULAR HTH CHLORINE PER STICK OF PIPE OR ONE CALCIUM HYPOCHLORITE TABLETco (STICK TAB) PER STICK OF PIPE IS REQUIRED FOR DISINFECTION. `�-, © r 0 N Z Z Q 17. PIPE ABANDONMENT FOR ABANDONMENT OF STEEL OR Cl PIPES, PLUG BOTH ENDS OF ABANDONED PIPE. FOR ABANDONMENT OF AC PIPES, THE o CONTRACTOR SHALL OBTAIN AN AC PIPE WAIVER FROM EITHER KING COUNTY OR THE CITY OF RENTON; OTHERWISE, IT 0 o SHALL BE REMOVED AND PROPERLY DISPOSED. FOR ABANDONMENT OF SERVICES, REMOVE CORP AND PLUG SADDLE. z THE CONTRACTOR SHALL NOTIFY THE WATER DISTRICT OPERATIONS MANAGER AT LEAST 48 HOURS (TWO WORKING DAYS) c � Q o IN ADVANCE OF SERVICE ABANDONMENT FOR SCHEDULING AND CUSTOMER NOTIFICATION. W-383505 R- 383518 WAHR DIS'MCT NO. 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