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DocuSign Envelope ID: 72E7BD50- E5C5- 4BEA- B4AA- FCA907469BF8
<br />LVA
<br />'HOG WIRE ATTACHED
<br />POSTS WITH LENGTHS
<br />OF WIRE
<br />nos:
<br />1. USE STAPLES V MART HORIZONTALLY
<br />AND VER71CALLY TO ATTACH THE
<br />FABRIC TO THE HOG MIRE.
<br />2. SPACE THE BAFFLES ACCORDING TG
<br />THE APPROVED PLAN.
<br />3. THE FLOOR OF THE &SIN IN THE
<br />OUTLET ZONE AND SSW SHOULD
<br />BE SEEDED IMMEDIATELY AFTER
<br />THE BASIN IS CONSTRUCTED.
<br />PIIREDOSECURELY TO VERTICAL
<br />BAFFLE MP.)
<br />MET ZONE
<br />OF SURFACE
<br />FIRST CHAMBER
<br />i' M% OF SURFACE AREA
<br />SECOND CHAMBER
<br />25X OF SURFACE AREA
<br />)NE
<br />FACE ARE I 1
<br />BURIED IN
<br />TOP OF BAFFLE SHOULD BE 6'
<br />BELOW THE TOP OF THE BERM -
<br />CONSTRUCTION SPECIFICATION
<br />1. GRADE THE BASIN SO THAT THE BOTTOM IS LEVEL FRONT TO BACK AND SIDE TO SIDE.
<br />2. INSTALL POSTS OR SAW HORSES ACROSS THE WIDTH OF THE SEDIMENT TRAP.
<br />3. STEEL POSTS SHOULD BE DRIVEN TO A DEPTH OF 24 INCHES, SPACED A MAXIMUM OF 4 FEET APART, AND INSTALLED UP THE SIDES OF THE BASIN
<br />AS WELL. THE TOP OF THE FABRIC SHOULD BE 6 INCHES HIGHER THAN THE INVERT OF THE SPILLWAY. TOPS OF BAFFLES SHOULD BE 2 INCHES
<br />LOWER THAN THE TOP OF THE BERMS.
<br />4. INSTALL AT LEAST THREE ROWS OF BAFFLES BETWEEN THE INLET AND OUTLET DISCHARGE POINT. BASINS LESS THAN 20 FEET IN LENGTH MAY USE
<br />2 BAFFLES.
<br />5. WHEN USING POSTS, ADD A SUPPORT WIRE OR ROPE ACROSS THE TOP OF THE MEASURE TO PREVENT SAGGING.
<br />6. WRAP POROUS MATERIAL, LIKE JUTE BACKED BY COIR MATERIAL, OVER A SAWHORSE OR THE TOP WIRE. HAMMER REBAR INTO THE SAWHORSE LEGS
<br />FOR ANCHORING. THE FABRIC SHOULD HAVE FIVE TO TEN PERCENT OPENINGS IN THE WEAVE. ATTACH FABRIC TO A ROPE AND A SUPPORT
<br />STRUCTURE WITH ZIP TIES, WIRE, OR STAPLES.
<br />7. THE BOTTOM AND SIDES OF THE FABRIC SHOULD BE ANCHORED IN A TRENCH OR PINNED WITH 8 -INCH EROSION CONTROL MATTING STAPLES.
<br />8. DO NOT SPLIC THE FABRIC, BUT USE A CONTINUOUS PIECE ACROSS THE BASIN.
<br />MAINTENANCE
<br />1. INSPECT BAFFLES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REQUIRED REPAIRS IMMEDIATELY.
<br />2. BE SURE TO MAINTAIN ACCESS TO THE BAFFLES. SHOULD THE FABRIC OF A BAFFLE COLLAPSE, TEAR, DECOMPOSE, OR BECOME INEFFECTIVE,
<br />REPLACE IT PROMPTLY.
<br />3. REMOVE SEDIMENT DEPOSITS WHEN IT REACHES HALF FULL TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE
<br />PRESSURE ON THE BAFFLES. TAKE CARE TO AVOID DAMAGING THE BAFFLES DURING CLEANOUT. SEDIMENT DEPTH SHOULD NEVER EXCEED HALF THE
<br />DESIGNED STORAGE DEPTH.
<br />4. AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED, REMOVE ALL BAFFLE MATERIALS AND UNSTABLE SEDIMENT DEPOSITS,
<br />BRING THE AREA TO GRADE, AND STABILIZE IT.
<br />1 POROUS BAFFLES
<br />SCALE: N.T.S.
<br />6,12.2
<br />O
<br />In waterways and channels that carry concentrated flow, properly pegged sod is
<br />preferable to seed because it provides immediate protection. Drop inlets placed
<br />in areas to be grassed can be protected from sediment by placing permanent
<br />sod strips around the inlet (Practice 6.53, Sod Drop Inlet Protection). Sod also
<br />maintains the necessary grade around the inlet.
<br />Because sod is composed of living plants that must receive adequate care, final
<br />grading and soil preparation should be completed before sod is delivered. If
<br />left rolled or stacked, heat can build up inside the sod, causing severe darnage
<br />and loss of costly plant material.
<br />Specifications Choosing appropriate types of sod -The type of sod selected should be
<br />composed of plants adapted to both the site and the intended purpose. In
<br />North Carolina these are limited to Kentucky bluegrass, tall fescue, bluegrass -
<br />tall fescue blends, fine -turf (hybrid) Bermudagrass, St. Augustinegrass,
<br />centipedegrass, and zoysiagrass. Species selection is primarily determined
<br />by region, availability, and intended use (Table 6.12a). Availability varies
<br />across the state and from year to year. New varieties are continually being
<br />developed and tested. A complete and current listing of sod recommendations
<br />can be obtained from suppliers or the State Agricultural Extension office. Sod
<br />composed of a mixture of varieties may be preferred becaase of its broader
<br />range of adaptability.
<br />Table 6.12a
<br />Types of sod Available in
<br />North Carolina
<br />Warm Season Grasses:
<br />Varieties
<br />Region of
<br />Hybrid Bermudagrass
<br />Vamont, Tifway, Tifway
<br />Adaptation
<br />Cool Season Grasses:
<br />II & Tifgreen
<br />Coastal Plain
<br />Kentucky blugrass blend'
<br />Emerald, Meyer
<br />Mountains
<br />Tall fescue blend
<br />Adventure, Brookston,
<br />Mountains
<br />Centipedegrass
<br />Falcon, Finelawn,
<br />and Piedmont
<br />Galway, Houndog,
<br />Coastal Plain
<br />St. Augustinegrass
<br />Jaguar, Olympic, Nebel
<br />Piedmont and
<br />Tall fescue /Kentucky
<br />Mountains
<br />bluegrass
<br />Agricultural Extension office for recommendations.
<br />and Piedmont
<br />Warm Season Grasses:
<br />4'
<br />min �1 Island over inlet
<br />3-1 1.5' min
<br />Hybrid Bermudagrass
<br />Vamont, Tifway, Tifway
<br />Piedmont and
<br />II & Tifgreen
<br />Coastal Plain
<br />Zoysiagrass
<br />Emerald, Meyer
<br />Piedmont and
<br />Coastal Plain
<br />Centipedegrass
<br />No improved varieties
<br />Piedmont and
<br />Coastal Plain
<br />St. Augustinegrass
<br />Raleigh
<br />Piedmont and
<br />Coastal Plain
<br />'A large number of varieties exist - consult suppliers and your local
<br />Agricultural Extension office for recommendations.
<br />LVA
<br />To- spacing
<br />Plastic o�
<br />corrugaled '1 ' i
<br />pipe A u-
<br />Stabilize
<br />outlet+
<br />ll�lllll��ill1=
<br />4 'min ~I
<br />level section
<br />Figure B.12a Cross seo[oa ®R lemporary slope drain
<br />Diversion
<br />Dike
<br />4'
<br />min �1 Island over inlet
<br />3-1 1.5' min
<br />Nn stakes ►
<br />=1i �l�
<br />llllll�TfT�
<br />-tll Inlet _�f1; -tnl Luf "9
<br />Top of
<br />hdnC-Led
<br />�
<br />fill {isfdnOJ
<br />Top � w ;•"r
<br />t4vfrsion A .. ". 0.5' min
<br />NaTW3l A - - A
<br />1.5' mn
<br />°111 2 11 11 =Iii I M
<br />-
<br />rfiarrrel
<br />I'6 TEMPORARY SLOPE DRAIN
<br />SCALE: N.T.S.
<br />MAINTENANCE
<br />1 WEEKLYT AND POR ERYEACOHP SIGNIFICANT LEAST INCH
<br />OR GREATER) RAINFALL EVENT.
<br />2. INSPECT HOLD DOWN STAKES AND ENSURE PIPE
<br />IS SECURE. ANY DAMAGED OR MISSING STAKES
<br />SHALL BE REPLACED.
<br />3. INSPECT OUTLET STABILIZATION ENSURE THAT
<br />GRAVEL PAD IS SUFFICIENT TO ATTENUATE
<br />VELOCITY AND PREVENT SCOUR.
<br />4. INSPECT DIVERSION DIKE TO TEMPORARY SLOPE
<br />RAIN IS NOT BYPASSED.
<br />5. I EROSION OCCURS DUE TO POORLY CONTROLLED
<br />D AGE, THE PROBLEM SHALL BE FIXED AND
<br />THE D AREA PROTECTED.
<br />OVERLAP OR ABUT
<br />ROLL EDGE (TYP.)-
<br />o��v
<br />MAINTENANCE
<br />1. INSPECT LLED EROSION CONTROL PRODUCTS AT
<br />LEAST EKLY AND AFTER EACH SIGNIFICANT
<br />(1/2 H OR GREATER) RAINFALL EVENT.
<br />6 IN MIN. DEPTH 2. GOO CONTACT WITH THE GROUND MUST BE
<br />KEY TRENCHFOR ROLL MAIN AINED, AND EROSION MUST NOT OCCUR
<br />END (TYP.) BENE TH THE RECP.
<br />3. ANY REAS OF THE RECP THAT ARE DAMAGED
<br />OR N T IN CLOSE CONTACT WITH THE GROUND
<br />SHA BE REPAIRED AND STAPLED.
<br />6 IN MIN. OVERLAP �� �j 4. IF OSION OCCURS DUE TO POORLY CONTROLLED
<br />AT ROLL END ��� r / D AINAGE, THE PROBLEM SHALL BE FIXED AND
<br />(TYP.) (� �....I T ERODED AREA PROTECTED.
<br />5. MO ITOR AND REPAIR THE RECP AS NECESSARY
<br />UN IL GROUND COVER IS ESTABLISHED.
<br />=_= - ' ' ' ' ' ' ' 6 IN MIN. DEPTH KEY TRENCH
<br />......... FOR UPPER END OF
<br />• • .... ; DOWNSLOPE ROLL (TYP.)
<br />PREPARED SURFACE WITH
<br />ISOMETRIC VIEW SEED IN PLACE
<br />CONSTRUCTION SPECIFICATIONS
<br />1. USE MATTING THAT HAS A DESIGN VALUE FOR SHEAR STRESS EQUAL TO OR HIGHER THAN THE SHEAR
<br />STRESS DESIGNATED ON APPROVED PLANS.
<br />2. USE TEMPORARY SOIL STABILIZATION MATTING MADE OF DEGRADABLE (LASTS 6 MONTHS MINIMUM)
<br />NATURAL FIBERS. MAT MUST HAVE UNIFORM THICKNESS AND DISTRIBUTION OF FIBERS THROUGHOUT AND
<br />BE SMOLDER RESISTANT. CHEMICALS USED IN THE MAT MUST BE NON- LEACHING AND NON -TOXIC TO
<br />VEGETATION AND SEED GERMINATION AND NON- INJURIOUS TO THE SKIN. IF PRESENT, NETTING MUST
<br />NOT CONTAIN ANY PLASTICS WITH A MAXIMUM MESH OPENING OF 2x2 INCHES AND SUFFICIENTLY
<br />BONDED OR SEWN ON 2 INCH CENTERS ALONG LONGITUDINAL AXIS OF THE MATERIAL TO PREVENT
<br />SEPARATION OF THE NET FROM THE PARENT MATERIAL.
<br />3. SECURE MATTING USING STEEL STAPLES, WOOD STAKES, OR BIODEGRADABLE EQUIVALENT. STAPLES
<br />MUST BE "U" OR "T" SHAPED STEEL WIRE HAVING A MINIMUM GAUGE OF NO. 11 AND NO. 8
<br />RESPECTIVELY. "U" SHAPED STAPLES MUST AVERAGE 1 TO 1Y2 INCHES WIDE AND BE A MINIMUM OF
<br />6 INCHES LONG. "T" SHAPED STAPLES MUST HAVE A MINIMUM 8 INCH MAIN LEG, A MINIMUM 1 INCH
<br />SECONDARY LEG, AND A MINIMUM 4 INCH HEAD. WOOD STAKES MUST BE ROUGH -SAWN HARDWOOD,
<br />12 TO 24 INCHES IN LENGTH, 10 INCH IN CROSS SECTION, AND WEDGE SHAPED AT THE BOTTOM.
<br />4. PERFORM FINAL GRADING, TOPSOIL APPLICATION, SEEDBED PREPARATION, AND PERMANENT SEEDING IN
<br />ACCORDANCE WITH SPECIFICATIONS. PLACE MATTING WITHIN 48 HOURS OF COMPLETING SEEDING
<br />OPERATIONS UNLESS END OF WORKDAY STABILIZATION IS SPECIFIED ON THE APPROVED EROSION AND
<br />SEDIMENT CONTROL PLAN.
<br />5. UNROLL MATTING IN DIRECTION OF WATER FLOW, CENTERING THE FIRST ROLL ON THE CHANNEL
<br />CENTERLINE. WORK FROM CENTER OF CHANNEL OUTWARD WHEN PLACING ROLLS. LAY MAT SMOOTHLY
<br />AND FIRMLY ON THE SEEDED SURFACE. AVOID STRETCHING THE MATTING.
<br />6. KEY -IN UPSTREAM END OF EACH MAT ROLL BY DIGGING A 6 INCH (MINIMUM) TRENCH AT THE
<br />UPSTREAM END OF THE MATTING, PLACING THE ROLL END IN THE TRENCH, STAPLING THE MAT IN
<br />PLACE, REPLACING THE EXCAVATED MATERIAL, AND TAMPING TO SECURE THE MAT END.
<br />7. OVERLAP OR ABUT THE ROLL EDGES PER MANUFACTURER RECOMMENDATIONS. OVERLAP ROLL ENDS BY
<br />6 INCHES (MINIMUM), WITH THE UPSTREAM MAT OVERLAPPING ON TOP OF THE NEXT DOWNSTREAM MAT.
<br />8. STAPLE /STAKE MAT IN A STAGGERED PATTERN ON 4 FOOT (MAXIMUM) CENTERS THROUGHOUT AND
<br />2 FOOT (MAXIMUM) CENTERS ALONG SEAMS, JOINTS, AND ROLL ENDS.
<br />9. ESTABLISH AND MAINTAIN VEGETATION SO THAT REQUIREMENTS FOR ADEQUATE VEGETATIVE
<br />ESTABLISHMENT ARE CONTINUOUSLY MET IN ACCORDANCE WITH VEGETATIVE STABILIZATION
<br />SPECIFICATION.
<br />ROLLED EROSION CONTROL PRODUCTS ARE NOT TO CONTAIN ANY TYPE OF PLASTI
<br />COMPONENTS, INCLUDING BIODEGRADABLE AND PHOTO- DEGRADABLE PLASTICS.
<br />i ROLLED EROSION CONTROL PRODUCTS
<br />.55.22 SCALE: N.T.S.
<br />Practice Standards an I Specifications
<br />Quality of sod -Use only high - quality sod of known genetic origin, free of
<br />noxious weeds, disease, and insect problems. It should appear healthy and
<br />vigorous, and conform to the following specifications:
<br />• Sod should be machine cut at a uniform depth of 1/2 - 2 inches (excluding
<br />shoot growth and thatch).
<br />- Sod should not have been cut in excessively wet or dry weather.
<br />• Sections of sod should be a standard size as determined by the supplier,
<br />uniform, and untorn.
<br />- Sections of sod should be strong enough to support their own weight, and
<br />retain their size and shape when lifted by one end.
<br />• Harvest, delivery, and installation of sod should take place within a period
<br />of 36 hours.
<br />Soil preparation -Test soil to determine the exact requirements for lime and
<br />fertilizer. Soil tests may be conducted by the State soil testing lab or a reputable
<br />commercial laboratory. Information on free soil testing is available from the
<br />Agronomic Division of the North Carolina Department of Agriculture or the
<br />Agricultural Extension Service. Where sodding must be planned without soil
<br />tests the following soil amendments may be sufficient:
<br />• Pulverized agricultural limestone at a rate of 2 tons /acre (100 lb/1,000
<br />ft')
<br />• Fertilizer at a rate of 1,000 lb /acre (25 lb/1,000 ft') of 10 -10 -10 in fall or
<br />5 -10 -10 in spring.
<br />Equivalent nutrients may be applied with other fertilizer formulations. These
<br />amendments should be spread evenly over the area, and incorporated into the
<br />top 4 -8 inches of soil by disking, harrowing, or other effective means. If
<br />topsoil is applied, follow specifications given in Practice 6.04, Top.soiliing.
<br />Prior to laying sod, clear the soil surface of trash, debris, roots, branches,
<br />stones, and clods larger than 2 inches in diameter. Fill or level low spots in
<br />order to avoid standing water. Rake or harrow the site to achieve a smooth
<br />and level final grade.
<br />Complete soil preparation by rolling or cultipacking to firm the soil. Avoid
<br />using heavy equipment on the area, particularly when the soil is wet, as this
<br />may cause excessive compaction, and make it difficult for the sod to take
<br />root.
<br />Sod installation -A step -by -step procedure for installing sod is illustrated in
<br />Figure 6.12a and described below.
<br />1. Moistening the sod after it is unrolled helps maintain its viability. Store it
<br />in the shade during installation.
<br />2. Rake the soil surface to break the crust just before laying sod. During the
<br />summer, lightly irrigate the soil, immediately before laying the sod to cool the
<br />soil, reduce root burning, and dieback.
<br />6.12.3
<br />...r.... --..�. �....- ....._.. �_
<br />C
<br />Lay sod in a staggered
<br />pattern with strips butted
<br />tightly against each other. A
<br />sharpened mason's trowel can
<br />be used to tuck down the ends
<br />and trim pieces.
<br />orrect Butting - angled ends caused by the automatic
<br />sod cutting must be matched correctly.
<br />Incorrect
<br />11�
<br />I r
<br />�e. `" .� _ ,•� .. +ti..�y..u.. ; elf. � '• -� •,. • +.
<br />Roll sod immediately to Water to a depth of 4 " Mow when the sod is es-
<br />achieve firm contact as soon as the sod is tablished (2 -3 wks). Set
<br />with the soil. laid, and continue the mower high (2 -3 ").
<br />watering as needed.
<br />Figure 6.12a Proper installation of grass sod (modified from Va SWCC).
<br />6.12.4
<br />3. Do not sod on gravel, frozen soils, or soils that have been treated recently
<br />with sterilants or herbicides.
<br />4. Lay the first row of sod in a straight line with subsequent rows placed
<br />paralled to and butting tightly against each other. Stagger strips in a brick -like
<br />pattern. Be sure that the sod is not streached or overlapped and that all joints
<br />are butted tightly to prevent voids. Use a knife or sharp spade to trim and fit
<br />irregularly shaped areas.
<br />S. Install strips of sod with their longest dimension perpendicular to the
<br />slope. On slopes 3:1 or greater, or wherever erosion may be a problem, secure
<br />sod with pegs or staples.
<br />6. As sodding of clearly defined areas is completed, roll sod to provide firm
<br />contact between roots and soil.
<br />7. After rolling, irrigate until the soil is wet 4 inches below the sod.
<br />Practice Standards and Specifications
<br />8. Keep sodded areas moist to a depth of 4 inches until the grass takes root.
<br />This can be determined by gently tugging on the sod - resistance indicates
<br />that rooting has occurred.
<br />9. Mowing should not be attempted until the sod is firmly rooted, usually 2 -3
<br />weeks.
<br />Sodded waterways -Sod provides a resilient channel lining, providing
<br />immediate protection from concentrated runoff and eliminating the need for
<br />installing mats or mulch. The following points apply to the use of sod in
<br />waterways:
<br />1. Prepare the soil as described in Practice 6.30, Grass -lined Channels. The
<br />sod type must be able to withstand the velocity of flow specified in the channel
<br />design (Appendix 8.05).
<br />2. Lay sod strips perpendicular to the direction of flow, with the lateral _joints
<br />staggered in a brick -like pattern. Edges should butt tightly together (Figure
<br />6.12b).
<br />Flow
<br />Lay sod across the
<br />direction of flow.
<br />Use pegs or stables to fasten sod firmly at the
<br />ends of strips and in the center, or every 3 -4'
<br />if the strips are long. When ready to mow,
<br />drive pegs or staples flush with the ground.
<br />awawwwuwsrww w i � _ -�
<br />�wCRAill�fi4#aJ -���
<br />.as+.aa■shiga /�=w►.
<br />Figure 6.12b Installation of sod in waterways (modified from Va SwCC).
<br />T
<br />L' -10"
<br />1r Peg or
<br />.staple , s
<br />In critical areas, secure
<br />sod with netting and
<br />staples.
<br />6.12.5
<br />Maintenance After the first week, water as necessary to maintain adequate moisture in the
<br />root zone and prevent dormancy of the sod.
<br />Do not remove more than one -third of the shoot in any mowing. Grass height
<br />should be maintained between 2 and 3 inches unless otherwise specified.
<br />After the first growing season, established sod requires fertilization, and may
<br />also require lime. Follow soil test recommendations when possible, or use the
<br />rates in Table 6.12b.
<br />LVA
<br />device: \ \CRZSVR2 \Canon iR4570 P53 file name: N: \1613 Sportsplex Fieldhouse \Civil \CAD Files Current \1613 Sportsplex Field House16y4 .aLfflaam€,EIW€YJC�4#T.dwg date /time printed: 9/29/2017 2:41 :49 PM
<br />222 cloister court
<br />chapel hill, nc 27514
<br />919.401.8586
<br />www.cra- ae.com
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<br />no. revisions
<br />NCDEQ RESPONSE
<br />TO COMMENTS
<br />8/30/17
<br />NCDEQ RESPONSE
<br />TO COMMENTS
<br />9/01/17
<br />3 NCDENR REVISI ❑N
<br />#3 09/26/17
<br />drawn checked
<br />ETS MLH
<br />EROSION
<br />CONTROL
<br />DETAILS
<br />sheet
<br />C5m2
<br />date project no.
<br />09/11/2017 1613
<br />
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