SW3210302_Plansheet - Notes_20220510 (6)

SECTION 2930 - SEEDING AND LANDSCAPING
1.1 INTRODUCTION
THIS SECTION COVERS THE FURNISHING OF ALL LABOR, EQUIPMENT, MATERIAL AND ANY OTHER ITEMS NECESSARY FOR LANDSCAPING OF ALL AREAS OFTHE SITE DISTURBED BY CONSTRUCTION
OPERATIONS AND ALL EARTH SURFACES OF EMBANKMENTS INCLUDING ROUGH AND FINE GRADING, TOPSOIL IF REQUIRED, FERTILIZER, LIME, SEEDING AND MULCHING. THE CONTRACTOR SHALL
ADAPT HIS OPERATIONS TO VARIATIONS IN WEATHER OR SOIL CONDITIONS AS NECESSARY FOR SUCCESSFUL ESTABLISHMENT AND GROWTH OF GRASSES OR LEGUMES.
1.2 CATALOG CUT SUBMITTALS
CONTRACTOR SHALL SUBMIT 4 COPIES OF CATALOG CUTS TO ENGINEER FOR REVIEW FOR ALL MATERIALS THAT ARE REQUIRED TO COMPLETE THE WORK AS DESCRIBED IN THE ASSOCIATED
PLANS. ENGINEER WILL RETAIN TWO SETS OF ORIGINAL SUBMITTALS AND RETURN TWO SETS TO THE CONTRACTOR WITH THE APPROPRIATE RESPONSE ANNOTATED.
1.3 STORAGE AND HANDLING
CONTRACTOR SHALL TAKE ALL PRUDENT AND CUSTOMARY MEASURES TO ENSURE THAT ALL MATERIALS STAY MOISTURE FREE AND ARE NOT DEGRADED BY STORAGE OR HANDLING. ALL LIME AND
FERTILIZER SHALL BE KEPT FREE FROM HARDENING OR CAKING AND IF THIS OCCURS THEY SHALL BE PULVERIZED TO THEIR ORIGINAL STATE. ALL SEED SHALL BE FURTHER PROTECTED SUCH
THAT IT IS NOT SUBJECTED TO HEAT OR RODENTS. IF DEGRADATION OCCURS AND THE MATERIALS NO LONGER HOLD
THE MINERAL VALUES ADVERTISED THEN THEY SHALL BE REMOVED FROM THE SITE AND NEW MATERIALS APPLIED.
1.4 MATERIALS
A. LIME
THE QUALITY OF LIME AND ALL OPERATIONS IN CONNECTION WITH THE FURNISHING OF THIS MATERIAL SHALL COMPLY WITH THE REQUIREMENTS OF THE NORTH CAROLINA LIME LAW AND
REGULATIONS ADOPTED BY THE NC- BOARD OF AGRICULTURE.
LIME SHALL BE AGRICULTURE GRADE GROUND DOLOMITE LIMESTONE. IT SHALL CONTAIN NOT LESS THAN 85% OF THE CALCIUM AND MAGNESIUM CARBONATES AND SHALL BE OF SUCH FINENESS
THAT AT LEAST 90% WILL PASS A NO. 10 SIEVE AND AT LEAST 50% WILL PASS A NO.100 SIEVE.
B. FERTILIZER
THE QUALITY OF FERTILIZER AND ALL OPERATIONS IN CONNECTION WITH THE FURNISHING OF THIS MATERIAL SHALL COMPLY WITH THE REQUIREMENTS OF THE NORTH CAROLINA FERTILIZER LAW
AND REGULATIONS ADOPTED BY THE NC -BOARD OF AGRICULTURE. FERTILIZER SHALL BE 10-10-10 GRADES. UPON WRITTEN APPROVAL OFTHE ENGINEER A DIFFERENT GRADE OF FERTILIZER MAY
BE USED, PROVIDED THE RATE OF APPLICATION IS ADJUSTED TO PROVIDE THE SAME AMOUNTS OF PLANT FOOD.
C. SEED
THE QUALITY OF SEED AND ALL OPERATIONS IN CONNECTION WITH THE FURNISHING OF THIS MATERIAL SHALL COMPLY WITH THE REQUIREMENTS OF THE NORTH CAROLINA SEED LAW AND
REGULATIONS ADOPTED BY THE NC- BOARD OF AGRICULTURE. THE NC-DEPT. OF AGRICULTURE SHALL HAVE APPROVED SEED OR ANY AGENCY APPROVED BY THE ENGINEER BEFORE BEING
SOWN, AND NO SEED WILL BE ACCEPTED WITH THE DATE OF TEST MORE THAN 9 MONTHS PRIOR TO THE DATE OF SOWING. SUCH TESTING DOES NOT RELIEVE THE CONTRACTOR FROM
RESPONSIBILITY FOR FURNISHING AND SOWING SEED THAT MEETS THESE SPECIFICATIONS AT THE TIME OF SOWING. WHEN A LOW PERCENTAGE OF GERMINATION CAUSES THE QUALITY OF SEED TO
FALL BELOW THE MINIMUM PURE LIVE SEED SPECIFIED, THE CONTRACTOR MAY ELECT, SUBJECT TO APPROVAL OFTHE ENGINEER, TO INCREASE THE RATE OF SEEDING SUFFICIENTLY TO OBTAIN
THE MINIMUM PURE LIVE SEED CONTENTS SPECIFIED PROVIDED THAT SUCH AN INCREASE IN SEEDING DOES NOT CAUSE THE SQUARE YARD TO EXCEED QUANTITY OF NOXIOUS WEED SEED PER S
Q Q
THE QUANTITY THAT WOULD BE ALLOWABLE AT THE REGULAR RATE OF SEED. SEED SHALL BE ENTIRELY FREE FROM BULBETS OR SEED OF JOHNSON GRASS, NUTGRASS, SANDBUR, WILD ONION,
WILD GARLIC AND BERMUDA GRASS. THE SPECIFICATIONS FOR RESTRICTED NOXIOUS WEED SEED REFERS TO THE NUMBER PER POUND, SINGLY OR COLLECTIVELY, OF BLESSED THISTLE, WILD
RADISH, CANADA THISTLE, CORNCOCKEL, FIELD BINDWEED, QUACKGRASS, DODDERS, DOCK, HORSENETTLE, BRACTED PLANTAIN, BUCKHORN OR WILD MUSTARD; BUT IN NO CASE SHALL THE
NUMBER OF BLESSED THISTLE OR WILD RADISH EXCEED 27 SEEDS OF EACH PER POUND.
D. MULCH
STRAW SHALL BE FREE OF WEED SEED OR ANY OTHER SPECIES, WHICH WOULD BE DETRIMENTAL OR DETERRING TO SPECIFIED GRASS MATURATION. STRAW SHALL BE FROM OAT, RYE OR WHEAT
SPECIES AND THRESHED TO LIMIT SEED CONTENT.
E. TACK
EMULSIFIED ASPHALT OR ORGANIC TACK SHALL BE APPLIED UNIFORMLY OVER STRAW SO AS TO ENSURE PROPER HOLD AND GIVE UNIFORM APPEARANCE OVER THE ENTIRE AREA. TACK SHALL BE
APPLIED BY SPRAYING ONTO SURFACE IMMEDIATELY AFTER APPLYING STRAW. APPLICATION RATES WILL VARY DEPENDENT UPON CONDITIONS. ORGANIC TACK SHALL BE USED WHEN THE AMBIENT
TEMPERATURE IS BELOW FREEZING
1.5 PREPARATION
A. PROTECTION OF EXISTING VEGETATION
THE CONTRACTOR SHALL NOT REMOVE OR DAMAGE VEGETATION, WHICH IS OUTSIDE THE CLEARING LIMITS ESTABLISHED BY THE OWNER/ENGINEER OR AS DISPLAYED ON THE PLANS. ALL TREES
THAT ARE DAMAGED AND SCHEDULED TO REMAIN SHALL BE REPAIRED IN AN ACCEPTABLE MANNER PROMPTLY TO PREVENT PROGRESSIVE DETERIORATION. VEGETATION WHICH IS SCHEDULED TO BE
REPLACED OR IS DAMAGED BEYOND REPAIR DURING CONSTRUCTION OPERATIONS SHALL BE REPLACED WITH A SIMILAR SIZE AND SPECIES. WHERE THIS IS NOT FEASIBLE THE PROPERTY OWNER
SHALL BE COMPENSATED FOR THE VEGETATION DAMAGED. DAMAGE INCURRED DURING CONSTRUCTION OPERATIONS AND DUE TO INSUFFICIENT PROTECTION SHALL BE PAID AT THE CONTRACTORS
EXPENSE. EXISTING VEGETATION NOT INDICATED FOR REMOVAL SHALL BE PROTECTED AGAINST UNNECESSARY CUTTING, BREAKING OR SKINNING OF ROOTS, SKINNING OR BRUISING OF BARK OR
SMOTHERING OF VEGETATION BY PLACING STOCKPILES OF EXCAVATED MATERIAL AGAINST THE TRUNK OR EXCESSIVELY OVER ROOTS WITHIN THE DRIP LINE. VEGETATION SHALL ALSO BE
PROTECTED AGAINST EXCESSIVE VEHICLE OR FOOT TRAFFIC WITHIN THE DRIP LINE. ROOTS CUT DURING EXCAVATION SHALL BE PROPERLY PROTECTED BY EITHER ASPHALT SEALING OR IN SOME
CASES WRAPPING EXPOSED ROOTS IN WET BURLAP TO PREVENT DRYING.
B. GRADING
ROUGH GRADING OF THE AREA SHALL BE ACHIEVED AS SOON AS THE EXCAVATED AREA IS BACKFILLED AND COMPACTED. ROUGH GRADING SHALL BE DEFINED AS ALL MATERIAL RESTORED WHICH
IS REQUIRED TO BRING THE AREA TO FINISH GRADE AND ACCEPTABLE SURFACE DRAINAGE FOR STORM WATER WHICH PROVIDES FOR WATER TO FLOW FROM THE SITE IN SUCH A MANNER AS
THAT IT DOES NOT PLACE UNUSUAL RISK TO UNSUSPECTING USERS OF ADJACENT AREAS OR INHABITANTS. FINE GRADING OF THE AREA SHALL BE ACHIEVED IN A TIMELY MANNER AFTER
COMPLETION OF ROUGH GRADING OF THE AREA. FINE GRADING SHALL CONSIST OF SHAPING FINAL CONTOURS TO ENSURE PROPER DRAINAGE AND REMOVING ALL DEBRIS OR CONSTRUCTION
WASTE MATERIALS TO PROVIDE AN ACCEPTABLE APPEARANCE. CONSTRUCTION AREA SUBJECT TO FINISH GRADING SHALL HAVE SOIL LOOSENED TO A DEPTH OF NOT LESS THAN 6 INCHES IN A
MANNER APPROVED BY THE ENGINEER TO PROMOTE SEED GROWTH. ALL FINISH LANDSCAPING SHALL BE COMPLETED ON A SECTION -BY -SECTION BASIS WHERE IT IS REASONABLE TO EXPECT
COMPLETION OF LANDSCAPING. ALL GRADING, LANDSCAPING, AND EROSION CONTROL MEASURES SHALL BE PROPERLY PURSUED AND MAINTAINED IN ORDER TO MAINTAIN AND ACCEPTABLE
APPEARANCE OF THE PROJECT. IF SUCH TIME OCCURS AS THIS PERCEPTION IS DEGRADED THEN THE ENGINEER MAY SUSPEND
PROGRESS ON THE PROJECT UNTIL THE ISSUES ARE APPROPRIATELY ADDRESSED.
C. SURFACE AUD BED PREPARATION
THE CONTRACTOR SHALL SMOOTH OR SHAPE SURFACE CONTOURS OUTSIDE THE PROJECT SITE WHEN SUCH CONTOURS ARE DETRIMENTAL TO THE SEEDBED PREPARATION OR WILL POSE
FORESEEABLE PROBLEMS WITH FUTURE MAINTENANCE OF THE AREA. THE ENGINEER SHALL DIRECT THE CONTRACTOR TO WHAT EXTENT OUTSIDE AREAS SHALL BE AFFECTED OR THE CONTRACTOR
MAY ELECT TO WORK WITH INDIVIDUAL PROPERTY OWNERS WITH WRITTEN VERIFICATION DELIVERED TO THE ENGINEER/OWNER OF THE AGREEMENT WITH THE PROPERTY OWNER'S SIGNATURE.
LC LEVEL AREAS AND SLOPES LESS THAN 2:1
THE CONSTRUCTION AREA SHALL HAVE SOIL LOOSENED TO A DEPTH NOT LESS THAN 6 INCHES AND SHALL BE FREE FROM ALL DEBRIS, CLODS AND ALL OTHER IRREGULARITIES WHICH WOULD
PROHIBIT A SMOOTH, SHAPED FINISH GRADE. TOP 3 INCHES OF SOIL SHALL BE WORKED TO A CLOD FREE FINISH SUITABLE FOR PLANTING SEED.
2.0 SLOPES GREATER THAN 2:1
THE CONSTRUCTION AREA SHALL HAVE
SOIL LOOSENED AND ACCEPTABLE FOR VEGETATION GROWTH BUT THE
SURFACE SHALL BE FREE FROM ALL DEBRIS,
CLODS AND OTHER IRREGULARITIES.
THE SURFACE MAY BE TRACK FINISHED,
SCARIFIED, GROOVED
OR PUNCTURED SO AS TO PROVIDE A
PLACE FOR SEED AND OTHER PLANTING MATERIAL TO LODGE. IN THE
CASE OF SUCH SLOPES THE ENGINEER MAY
ALLOW PARTIAL COMPLETION OF THE
SLOPE SECTIONS AT DIFFERENT TIMES TO PROMOTE STABILIZATION. IF THE VEGETATION GROWTH IS ACCEPTABLE
THE ENGINEER MAY ALLOW THIS TO REMAIN
AS THE PERMANENT GROUND COVER.
THE CONTRACTOR SHALL NOT PURSUE
THE FINISHED PREPARATION OF SURFACE AREAS TO BE LANDSCAPED
IF THE SOIL IS FROZEN, MARGINALLY WET
OR WHEN THE ENGINEER DEEMS IT
UNSUITABLE FOR WORKING CONDITIONS.
D. RATE OF APPLICATION
SEED SHALL BE APPLIED BY MEANS OF BROADCAST SPREADER, HYDRO -SEEDER OR OTHER PREVIOUSLY APPROVED METHOD. IN NO CASE SHALL SEED, LIME, OR FERTILIZER BE SPREAD BY
HAND. THE RATES OF APPLICATION FOR SEED, LIME AND FERTILIZER SHALL BE AS FOLLOWS, UNLESS A VARIANCE IS PERMITTED BY THE ENGINEER IN WRITING PRIOR TO PERFORMING WORK.
LD LIMESTONE
IN THE ABSENCE OF A SOIL TEST PERFORMED AT THE CONTRACTORS EXPENSE AND GIVEN TO THE ENGINEER ON LETTERHEAD FROM THE TESTING LABORATORY, LIMESTONE SHALL BE APPLIED AT
THE RATE OF 2000 LB/ ACRE.
SECTION 2930-4
2.D FERTILIZER
IN THE ABSENCE OF SOIL TEST PERFORMED AT THE CONTRACTOR'S EXPENSE AND GIVEN TO THE ENGINEER ON LETTERHEAD FROM THE TESTING LABORATORY, FERTILIZER SHALL BE APPLIED AT
THE RATE OF 1000 LB/ ACRE. FERTILIZER SHALL BE 10-10-10 GRADE, UNLESS A VARIANCE IS PERMITTED BY THE ENGINEER IN WRITING PRIOR TO PERFONNING WORK. A SECOND APPLICATION
AT 500-LB/ ACRE SHALL BE APPLIED TO THE AREA WHEN THE GRASS HAS REACHED A BLADE HEIGHT OF 3 INCHES OR 45 DAYS WHICH EVER COMES FIRST.
3.D SEED
THE TYPE AND RATE OF APPLICATION SHALL VARY AT DIFFERENT TIMES OF THE YEAR AND SHALL BE APPLIED AT THE RATE AND TYPE APPROPRIATE FOR THE TIME OF YEAR. ALL RATES OF
APPLICATION ARE MEASURED IN POUNDS PER ACRE.
A. FALL AND WINTER (SEPT. 1 TO MAY 1)
85 POUNDS OF KY-31 TALL FESCUE MIXED WITH 15 POUNDS OF RYE GRAIN.
B. SPRING AND SUMMER (MAY 1 TO SEPTEMBER 1)
100 POUNDS OF KY-31 TALL FESCUE MIXED WITH 10 POUNDS OF RYE GRAIN.
C. CUT OR FILL SLOPES GREATER THAN 2:1
THE APPLICATION RATE ON CUT OR FILL SLOPES GREATER THAN 2: 1 SHALL INCLUDE THE APPROPRIATE MIX ABOVE FOR THE TIME OF YEAR ALONG WITH; 40 LB ACRE OF SERICEA
LESPEDEZA (HULLED IN SPRING OR SUMMER AND UNHULLED IN FALL AND WINTER) AND EITHERL5 POUNDS OF SUDAN GRASS IN SPRING AND SUMMER OR 25 POUNDS OF RYE
CEREAL PER ACRE IN FALL AND WINTER.
4.D MULCH
MULCH SHALL BE STRAW MULCH APPLIED AT A RATE OF APPROXIMATELY 3000 POUNDS PER ACRE. STRAW SHALL BE APPLIED AT SUCH RATE NECESSARY TO THOROUGHLY COVER AND PROTECT
ALL FINISH GRADING, SEED, LIME AND FERTILIZER BUT NOT SMOOTHER THE MATURATION OF SEED.
E. APPLICATION
APPLICATION OF ALL LIMESTONE, FERTILIZER, SEED AND MULCH SHALL BE COMPLETED IMMEDIATELY FOLLOWING FINAL PREPARATION OFTHE SEED BED AND SHALL NOT BE PURSUED DURING A
TIME WHEN THE ENGINEER DEEMS WEATHER TO BE NON -CONDUCIVE FOR SEED GROWTH, I. E. GROUND WET, FROZEN, ETC. LIME, FERTILIZER AND SEED SHALL BE DISTRIBUTED UNIFORMLY OVER
THE PREPARED SEEDBED AT THE SPECIFIC RATE OF APPLICATION AND THEN HARROWED, RAKED, OR OTHERWISE THOROUGHLY WORKED OR MIXED INTO THE SEEDBED. IMMEDIATELY FOLLOWING
THE COVERING OPERATION, THE SEEDBED SHALL BE PROPERLY COMPACTED AS DIRECTED IN THE MANNER AND DEGREE APPROVED BY THE ENGINEER.
WHEN A HYDRAULIC SEEDER IS USED FOR APPLICATION OF SEED AND FERTILIZER, THE SEED SHALL NOT REMAIN IN WATER CONTAINING FERTILIZER FOR MORE THAN I HOUR PRIOR TO
APPLICATION UNLESS OTHERWISE PERMITTED BY THE ENGINEER.
THE ENGINEER MAY PERMIT MODIFICATIONS TO THE REQUIREMENTS FOR COVERING OR COMPACTING LIME, FERTILIZER AND SEED IN THE PREPARED SEEDBED IF THE CONTRACTOR REQUESTS
MODIFICATION DUE TO HEIGHT, STEEPNESS OF SLOPE OR NON -CONDUCIVE SOIL CONDITIONS. MODIFICATIONS MAY BE CONSIDERED IF THE CASE OF: SLOPES GREATER THAN 2: 1 AND SLOPES
WHERE SURFACE IS TO ROCKY TO SUCCESSFULLY PERMIT COMPACTION OR COVERING OFTHE SEEDBED. MODIFICATIONS MAY BE PERMITTED TO INCLUDE REDUCTION OF APPLICATION RATES AND
REDUCTION OR ELIMINATION OF COMPACTION REQUIREMENTS. ALL EQUIPMENT NORMAL AND PRUDENT FOR THE PREPARATION OF SEEDBED AND UNIFORM DISTRIBUTION OF LIME, FERTILIZER AND
SEED SHALL BE APPROVED BY THE ENGINEER PRIOR TO USE ON THE PROJECT. IN THE EVENT OF MALFUNCTIONING OR IMPROPERLY MAINTAINED EQUIPMENT, THE ENGINEER RESERVES THE RIGHT
TO SUSPEND WORK ON THE PROJECT UNTIL
SUCH TIME AS THE EQUIPMENT IS RESTORED TO GOOD REPAIR AND PROPERLY OPERATIONAL.
F. MULCHING
MULCH SHALL BE SPREAD UNIFORMLY OVER ALL SEEDED AREAS AT A RATE OF I YZ TO 2 TONS PER ACRE IN A CONTINUOUS, UNIFORM BLANKET. MULCH SHALL BE SPREAD BY HAND OR BY
APPROVED MECHANICAL SHREDDER OR BLOWER WHICH WILL PROVIDE A UNIFORM BLANKET. AN ACCEPTABLE APPLICATION SHALL BE ONE THAT COMPLETELY COVERS THE GROUND BUT STILL
ALLOWS SOME SUNLIGHT TO PENETRATE AND AIR TO CIRCULATE WHILE PROVIDING EFFECTIVE SOIL MOISTURE CONSERVATION AND REDUCED EROSION. MULCHING OPERATION SHALL BE PURSUED
IMMEDIATELY FOLLOWING FINAL SEEDBED PREPARATION. TACK OR OTHER APPROVED BINDING MATERIAL SHALL BE APPLIED OVER TOP OF MULCH IN ALL NECESSARY AREAS TO ENSURE MULCH
WILL BE HELD IN PLACE DURING ADVERSE CONDITIONS. THE RATE AND METHOD OF APPLICATION SHALL BE COMPLETED AS DIRECTED BY THE ENGINEER. THE CONTRACTOR SHALL IMPLEMENT
SUFFICIENT PRECAUTIONS TO PREVENT MULCH FROM ENTERING DRAINAGE STRUCTURES THROUGH DISPLACEMENT BY WIND, WATER OR OTHER CAUSES. THE CONTRACTOR SHALL REMOVE
COMPLETELY ANY BLOCKAGE TO DRAINAGE STRUCTURES, WHICH MAY OCCUR.
G. MAINTENANCE
GRASSED AREAS SHALL BE ACCEPTED WHEN A 95% COVER OF PERMANENT GRASSES IS ACHIEVED AND WEEDS ARE NOT THE DOMINANT FOLIAGE. THE CONTRACTOR SHALL KEEP ALL GRASSED
AREAS IN GOOD CONDITION, RESEEDING AND MOWING IF AND WHEN NECESSARY AS DIRECTED BY THE ENGINEER. A GOOD LAWN SHALL BE ESTABLISHED OVER THE ENTIRE PROJECT AREA AND
SHALL BE MAINTAINED BY THE CONTRACTOR IN AN APPROVED MANNER AND KEPT IN AN APPROVED CONDITION UNTIL FINAL ACCEPTANCE.
THE CONTRACTOR SHALL PROTECT AGAINST WASHOUTS ON SLOPES AND DITCH SECTIONS BY A MANNER APPROVED BY THE ENGINEER. ANY DAMAGE OR FAILURE DUE TO ANY CAUSE SHALL BE
CORRECTED BY BEING EITHER REPAIRED OR COMPLETELY REDONE AS MAY BE DIRECTED BY THE ENGINEER. AREAS OF DAMAGE OR FAILURE RESULTING EITHER FROM NEGLIGENCE ON THE PART
OFTHE CONTRACTOR IN PERFORMING CONSTRUCTION OPERATIONS OR FROM NOT TAKING SUFFICIENT PRECAUTIONS TO CONTROL EROSION AND SILT AS REQUIRED THROUGHOUT THE VARIOUS
SECTIONS OFTHE SPECIFICATIONS, SHALL BE REPAIRED BY THE CONTRACTOR AS DIRECTED BY THE ENGINEER AT NO COST TO THE OWNER.
END OF SECTION
DRAINAGE
A. GENERAL NOTES
1. ALL WORK AND MATERIALS SHALL CONFORM TO THE LATEST EDITION OF THE NCDOT STANDARD SPECIFICATIONS UNLESS OTHERWISE SPECIFIED IN THIS MANUAL.
2. ONLY THE FOLLOWING DRAINAGE PIPE MATERIALS ARE ALLOWED WITHIN THE STREET RIGHT OF WAY WITHOUT PRIOR APPROVAL BY THE ENGINEER EXCLUDING DRIVEWAY PIPES:
(A) CLASS III REINFORCED CONCRETE PIPE.
(B) FULLY BITUMINOUS COATED CORRUGATED STEEL OR ALUMINUM PIPE WITH PAVED INVERT, MINIMUM 14 GAGE.
(C) HIGH DENSITY POLYETHYLENE (HDPE) PIPE WITH CORRUGATED EXTERIOR/SMOOTH INTERIOR CONFORMING TO THE REQUIREMENTS OF AASHTO SPECIFICATION M294 FOR CORRUGATED
POLYETHYLENE PIPE AND SHALL REQUIRE COUPLING BANDS AND FITTINGS AND INSTALLED PER MANUFACTURERS RECOMMENDATIONS.
3. ALL DRIVEWAY PIPES WITHIN RIGHT OF WAY MUST BE APPROVED BY ENGINEER.
4. ALL PIPE SHALL BE LAID WITH THE BELL OR GROOVE UPGRADE AND THE JOINT ENTIRELY INTERLOCKING.
5. PIPE USED WITHIN THE STREET RIGHT-OF-WAY SHALL BE A MINIMUM DIAMETER OF FIFTEEN (15) INCHES (EIGHTEEN (18) INCHES MINIMUM ON CROSS DRAIN CULVERTS).
6. THE MINIMUM COVER FOR ALL PIPE IS PER THE MANUFACTURERS RECOMMENDATIONS BUT SHOULD NOT BE LESS THAN TWO 2 FEET. SPECIAL APPLICATIONS FOR LESS THAN TWO 2 FEET OF
COVER WILL BE REVIEWED INDIVIDUALLY.
7. CONCRETE MORTAR JOINTS SHALL BE USED FOR JOINING ALL CONCRETE PIPES. THE PIPE SHALL BE CLEAN AND MOIST WHEN MORTAR IS APPLIED. THE LOWER PORTIONS OFTHE BELL OR
GROOVE SHALL BE FILLED WITH MORTAR SUFFICIENT TO BRING THE INNER SURFACE FLUSH AND EVEN WHEN THE NEXT JOINT IS FITTED INTO PLACE. THE REMAINDER OF THE JOINT SHALL THEN BE
FILLED WITH MORTAR AND A BEAD OR RING OF MORTAR FORMED AROUND THE OUTSIDE OF THE JOINT. THE APPLICATION OF MORTAR MAY BE DELAYED UNTIL FILL IS COMPLETED WHEN THE PIPE
IS LARGER THAN THIRTY (30) INCH.
8. PREFORMED JOINT SEALER, WHICH CONFORMS TO AASHTO SPECIFICATION M-198 FOR TYPE B FLEXIBLE PLASTIC GASKETS, MAY BE USED IN LIEU OF THE MORTAR JOINTING METHOD.
9. COUPLING BANDS AND FITTINGS SHALL BE USED FOR JOINING ALL HDPE PIPE. COUPLING BANDS SHALL COVER AT LEAST ONE FULL CORRUGATION ON EACH SECTION OF PIPE. GASKET
COUPLING BANDS ARE REQUIRED BETWEEN ALL PIPE JOINTS. THE GASKET SHALL BE MADE OF CLOSED -CELL SYNTHETIC EXPANDED RUBBER MEETING THE REQUIREMENTS OF ASTM D1056, TYPE 2.
GASKETS SHALL BE INSTALLED ON THE COUPLING BAND BY THE PIPE MANUFACTURER. ALL COUPLING BANDS SHALL MEET OR EXCEED THE SOIL -TIGHTNESS REQUIREMENT OF AASHTO STANDARD
SPECIFICATION FOR HIGHWAY BRIDGES, SECTION 23, PARAGRAPH 23.1.5.4(E). PIPE FITTINGS SHALL CONFORM TO AASHTO M252 OR AASHTO M294.
10. THE INTERIOR SURFACES OF ALL STORM DRAINAGE STRUCTURES SHALL BE POINTED UP AND SMOOTHED TO AN ACCEPTABLE STANDARD USING MORTAR MIXED TO MANUFACTURER'S
SPECIFICATIONS.
11. ALL PIPES IN STORM DRAIN STRUCTURES SHALL BE FLUSH WITH THE INSIDE WALL. ALL STORM DRAIN STRUCTURES SHALL HAVE HAND -FORMED FILLETS TO PREVENT STANDING WATER.
12. ALL CONCRETE SHALL BE 3000 PSI. PRIOR APPROVAL SHALL BE OBTAINED IN ORDER TO USE PRECAST STORM DRAINAGE STRUCTURES IN ANY STREET RIGHTS -OF -WAY BY CITY ENGINEER. ALL
PRECAST STRUCTURES SHALL MEET NCDOT STANDARDS.
13. ANY STORM DRAIN STRUCTURES OVER THREE (3) FEET AND SIX (6) INCHES IN HEIGHT MUST HAVE STEPS IN ACCORDANCE WITH STANDARD DETAILS SET FORTH IN THIS MANUAL.
14. ALL FRAMES, GRATES, RINGS, COVERS ETC., MUST CONFORM TO THE STANDARDS SET FORTH IN THIS MANUAL.
15. ALL GRADED CREEK BANKS AND SLOPES SHALL BE AT A MAXIMUM OF TWO (2) FEET HORIZONTAL TO ONE (1) FOOT VERTICAL (2:1).
16. ALL BACKFILL SHALL BE NON -PLASTIC IN NATURE, FREE FROM ROOTS, VEGETATIVE MATTER, WASTE, CONSTRUCTION MATERIAL OR OTHER OBJECTIONABLE MATERIAL. SAID MATERIAL SHALL BE
CAPABLE OF BEING COMPACTED BY MECHANICAL MEANS AND SHALL HAVE NO TENDENCY TO FLOW OR BEHAVE IN A PLASTIC MANNER UNDER THE TAMPING BLOWS OR PROOF ROLLING.
17. MATERIALS DEEMED BY THE ENGINEERING DIVISION AS UNSUITABLE FOR BACKFILL PURPOSES SHALL BE REMOVED AND REPLACED WITH SELECT BACKFILL MATERIAL.
18. BACKFILLING OF TRENCHES SHALL BE ACCOMPLISHED IMMEDIATELY AFTER THE PIPE IS LAID. THE FILL AROUND THE PIPE SHALL BE PLACED IN LAYERS NOT TO EXCEED SIX (6) INCHES, EACH
LAYER SHALL BE THOROUGHLY COMPACTED TO 95% OF THE MAXIMUM DENSITY OBTAINABLE WITH THE STANDARD PROCTOR TEST (A DENSITY OF 100% STANDARD PROCTOR IS REQUIRED FOR THE
TOP EIGHT (8) INCHES). ALL TEST SHALL BE PROVIDED BY CONTRACTOR AT NO COST TO THE CITY.
19. COMPACTION REQUIREMENTS SHALL BE ATTAINED BY THE USE OF MECHANICAL COMPACTION METHODS. EACH LAYER OF BACKFILL SHALL BE PLACED LOOSE AND THOROUGHLY COMPACTED IN
PLACE.
20. UNDER NO CIRCUMSTANCES SHALL WATER BE PERMITTED TO RISE IN UNBACKFILLED TRENCHES AFTER THE PIPE HAS BEEN PLACED.
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