Nashoba Engineering Associates
6 Beaver Brook Road
Littleton, MA 01460
978.501.3007
Civil Engineering 6 Beaver Brook Littleton MA 01460
3-6-19
RE:27 Fort Pond Hill Rd NOI
REF PLAN: Existing Conditions -PLAN 2018-009, 2-20-19
Amy Green, Agent for the
Littleton Conservation Commission
Hi Amy,
Attached are the revised documents that address the questions/concerns and request for more
information relative to the Notice of Intent application at 27 Fort Pond Hill Road.
The following changes have been made to the plan:
1) An area to store snow has been shown along the lower driveway
2) Boulders added along the end of the driveway
3) Erosion controls have been added
4)A cross section of the proposed spread has been added
5)Notes are added to address the fill in the riparian zone
6)A Operations and Maintenance Plan has been submitted
7)Specifications for the shoulder material has been submitted
8)The river-front area filled will be stabilized and maintained as lawn.
I am hopeful that you can review these revisions and place this matter before the Littleton
Commission for their March 11, 2019 meeting.
Please let me know if there is anything else you need,
Regards,
John F. Field, .P.E.
Principal
Nashoba Engineering Associates
Nashoba Engineering Associates
6 Beaver Brook Road
Littleton MA 01460
978 501 3007
March 6,
2019
Operations and Maintenance Plan
Project Site:
27 Fort Pond Hill
Road
Owner and Operator:
27 Fort Pond LLC
Inspect all storm water systems at the completion of the construction project, then at least twice a
year, at the end of the foliage season and the end of the snow removal season and after any
significant {2" or greater) rain event.
Paved areas:
Removing accumulated sediment, trash and other debris will reduce the amount of pollutants that enter
the infiltration system.
Snow and ice fighting and removal
o Due to the proximity of wetlands, care must be taken when removing snow from vehicular
paths. Do not push plowed snow into the wetlands but move the plowed snow towards the
designated areas away from the wetlands.
• Annually
Remove sand, salt, leaves, litter and other debris from paved areas by street
sweeping.
Swales and drainways along the driveway
Maintain swales by removing brush and other debris so that storm water flows unimpeded.
Gutters, Roof Drain Downspouts, Roof Drain Downspout Surcharge Pipe (if present):
Gutters and roof drain downspouts are used to collect and transport roof Storm water runoff for the
purposes of either discharging it freely onto the ground or to convey it to infiltration structures via
subsurface pipes.
Inspect gutters, downspouts and pipes that service the building. Remove any debris that may clog the
system.
All Catch Basins (if present):
Catch basins accept surface storm water runoff and remove TSS and some other debris in a sump
Inspect the sump of the catch basin and remove accumulated debris.
• As needed
o Inspect and clean catch basin sumps
• Annually
o Inspect and clean catch basin sumps, piping and areas.
Infiltration chambers (if present):
This project proposes infiltration chambers to accept, treat and infiltrate back into the ground storm
water.
• As needed
0 Remove trash and debris
• Semi-annually
o Inspect inflow points for clogging (off-line systems) and remove any sediment
o Measure and log depth of liquid at the observation port. If the liquid depth does
not drain out within 72 hours, notify the design engineer.
Annually
o Inspect and remove any sediment and debris build-up in pre-treatment areas.
o Inspect inflow points and surface for buildup sediment.
STORMWATER BMP INSPECTION AND MAINTENANCE LOG
Facility Name
Address
Begin Date End Date
Date BMP ID# BMP Description Inspected by: Cause for Inspection
Exceptions Noted Comments and Actions Taken
Instructions: Record all inspections and maintenance for all treatment BMPs on this form. Use additional log sheets and/or attach extended comments or documentation as necessary. Submit a copy of the completed log with the annual independent inspectors’ report to the City, and start a new log at that time.
BMP ID# — Always use ID# from the Operation and Maintenance Manual.
Inspected by — Note all inspections and maintenance on this form, including the required independent annual inspection. Cause for inspection — Note if the inspection is routine, pre-rainy-season, post-storm, annual, or in response to a noted problem or complaint. Exceptions noted — Note any condition that requires correction or indicates a need for maintenance.
Comments and actions taken — Describe any maintenance done and need for follow-up.
EXISTING WELLSEE NOTE 3
EXISTING BIT CONDRIVE
ST
PCSTPC
2" SDR 21
FORCE MAIN
4" SCH 40
L=1.75
S=2.3%
4" SCH 40
L=14.0
S=2.0%
FRENCH DRAINSEE NOTE 4
CHAMBERSSEE NOTE 5
SPREADERSEE DETAILTHIS SHEET
9.0" [229 mm] MIN.
27.7" [705 mm]
9.0" [229 mm] MIN.
58.5" [1486 mm]
CENTER TO CENTER
49.5" [1257 mm]18.0" [457 mm] MIN.
9.0" [229 mm] MIN.
12.0' [3.65m] MAX.
BURIAL DEPTH
GENERAL NOTES
RECHARGER 150XLHD BY CULTEC, INC. OF BROOKFIELD, CT.
STORAGE PROVIDED = 4.89 CF/FT (0.45 m³/m) PER DESIGN UNIT.
REFER TO CULTEC, INC.'S CURRENT RECOMMENDED INSTALLATION
GUIDELINES.
MAXIMUM ALLOWED COVER OVER TOP OF UNIT SHALL BE 12 '(3.65m).
THE CHAMBER WILL BE DESIGNED TO WITHSTAND TRAFFIC LOADS
WHEN INSTALLED ACCORDING TO CULTEC'S RECOMMENDED
INSTALLATION INSTRUCTIONS.
ALL RECHARGER 150XLHD HEAVY DUTY UNITS ARE MARKED WITH A
COLORED STRIPE FORMED INTO THE PART ALONG THE LENGTH OF THE
CHAMBER.
ALL RECHARGER 150XLHD CHAMBERS MUST BE INSTALLED IN
ACCORDANCE WITH ALL APPLICABLE LOCAL, STATE AND FEDERAL
REGULATIONS.
12.0" [300 mm]
MAX. INLET
12.0' [3.65m] MAX.
BURIAL DEPTH
12.0" [305 mm] MIN.
27.2" [691 mm] MIN.
SQUARE
16.4" [418 mm]
10.25"
[260 mm]
6.0' [1.8 m] MIN.
CULTEC NO. 66 WOVEN GEOTEXTILE
PLACED BENEATH FEED CONNECTORS
10.0' [3.0 m] MIN.
CULTEC NO. 66 WOVEN GEOTEXTILE
PLACED BENEATH INLET PIPES
RB#2 FRONTRB#1 REAR
MESH FENCE
PLASTIC MESH FENCE
PLASTIC
S
L
O
P
E
3'X3' FRENCH DRAIN WITH 6" PERF PVC
6" SCH 40 PVC ROOF DRAIN PIPE
COLLECTION PIPE WITH 1% SLOPE
EXISTING FOOTING, DRAIN AND FOUNDATION
NATIVE SOIL
FRONT VIEW
10' MAX O.C.
CONSTRUCTION PERIOD.
FENCE REMOVAL.
AROUND ALL SENSITIVE AREAS NOT TO BE DISTURBED.
CONSTRUCTION FENCING TO BE REMOVED AFTER COMPLETION OF SITE WORK.
FENCING SHALL BE INSTALLED TO PRESERVE AS MUCH NATURAL VEGETATION AS POSSIBLE.
CONTROL MEASURES SHALL BE TAKEN TO PROPERLY MAINTAIN THE FENCING THROUGHOUT SITE
INSPECTIONS SHALL BE FREQUENT AND REPAIR/REPLACEMENT SHALL BE MADE PROMPTLY AS
ALL DISTURBED AREAS TO HAVE PERMANENT VEGETATION AS SOON AS POSSIBLE AND PRIOR TO
DISTURBANCE WILL BE LIMITED TO ONLY THOSE AREAS NECESSARY FOR DEVELOPMENT.
A LIMIT OF DISTURBANCE FENCING BARRIER TO BE INSTALLED PRIOR TO CONSTRUCTION AND
ROOF DRAIN COLLECTION AT FOUNDATION DETAIL - CULTEC
1.
2.
3.
6.
5.
4.
NEEDED.
7.
PLAN VIEW
1"x1"x 4'
STAKE @ 10'
SPACING AND
6" BELOW
EXISTING
GRADE
NATIVE SOIL
FASTENED
WITH
NYLON
JIFFY TIES
SIDE VIEW
3.5'
FENCING NOTES
FENCING MAT
TO BE
PLACED
AGAINST
EXISTING
GRADE
42" HIGH
(MIN) NYLON
MESH FENCE
OF A HIGH
VISIBILITY
COLOR
WATER PROOFING (DESIGN BY OTHERS)
(NOT TO SCALE)
Ô
N
A
T
U
R
A
L
G
R
O
U
N
D
FiberRoot Mulch
OUTSIDE CASING: 100% ORGANIC HESSIAN.
COMPONENTS:
A BLEND OF COARSE AND FINE COMPOST AND
PARTICLE SIZES: 100% PASSING A 3" SCREEN;
90-100% PASSING A 1" SCREEN; 70-100%
PASSING A 0.75" SCREEN; 30-75% PASSING
WEIGHT: APPROX. 850 LBS./CU.YD.
SECTION END VIEW
WOOD POST WITH
NYLON JIFFY TIES
CONSTRUCTION FENCING DETAIL
1
8
"
FilterMitt
Ô
P
R
0
T
E
C
T
E
D
A
R
E
A
1
2
"
FilterMitt
FILLER INGREDIENT:
SHREDDED WOOD.
A 0.25" SCREEN.
(AVE. 30 LBS./L.F.)
EROSION CONTROL BARRIER DETAIL
NOVA ECONOMY
SAFETY FENCE
NOVA ECONOMY
SAFETY FENCE
(NOT TO SCALE)
FILTER MITT OR EQUIVALENT
Groundscapes Express, Inc.
FOR MORE INFORMATION VISIT:
www.groundscapesexpress.com
OR CONTACT AT:
P.O. BOX 737
WRENTHAM, MA 02093
(508) 384-7140
ÔFilterM
itt
FilterMitt
ÔFilterMitt INSTALLATION:
LENGTHS FROM 1' TO 100'.
IN LENGTHS FROM 1' TO 8'.
PR0TECTED
AREA
18"
FLOW
DISTURBED
AREA
1. WITH THE NEWEST TECHNOLOGY AND EQUIPMENT,
SECTIONS CAN BE CONSTRUCTED ON SITE IN
2. SECTIONS CAN ALSO BE DELIVERED TO THE SITE
3. THE FLEXIBILITY OF ALLOWS IT TO
CONFORM TO ANY CONTOUR OR TERRAIN WHILE
HOLDING A SLIGHTLY OVAL SHAPE AT 12" HIGH
Ô
TO STABILIZE THE UNION.
4. WHERE SECTION ENDS MEET, THERE SHALL BE
AN OVERLAP OF 6" OR GREATER. BOTH SIDES
SHALL BE ANCHORED (OAK STAKES, TREES, ETC.)
BY 18" WIDE.
F
L
O
W
0-1
2
VELOCITY REDUCTION
AND SETTLEMENT ZONE
DISTURBED AREA
Ô
SECTION TOP VIEW
WOOD POST
WITH NYLON
JIFFY TIES
RECHARGE BASIN DETAIL
(NOT TO SCALE)
B
4. THIS PLAN SET IS INTEDED FOR PERMITTING PURPOSES ONLY.
THESE SYSTEMS SHALL BE INSPECTED AND CLEANED TWICE PER YEAR (SPRING/FALL).
SYSTEM NOR THE RECHARGE BASIN UNLESS THE WATER IS CLEANSED AND FREE OF SEDIMENT, LEAF LITTER, ETC.
3. STORMWATER RUNOFF DURING ANY SITE CONSTRUCTION WORK SHALL NOT BE ALLOWED TO ENTER THE STORMWATER COLLECTION
ALL LEAF LITTER AND DEBRIS SHALL BE REMOVED FROM THE COLLECTION SYSTEMS BY EITHER THE HOMEOWNER OR A PAID
FOR STRUCTURES WITH DEEP SUMPS (4' BELOW GRADE) IT IS RECOMMENDED TO HAVE A PROFESSIONAL WITH A VACUUM TRUCK
ALL DEBRIS SHALL BE REMOVED FROM THE COLLECTION SYSTEMS BY EITHER THE HOMEOWNER OR A PAID PROFESSIONAL.
OF STONE WITHIN THE RECHARGE BASIN AND NOTE IF ANY STANDING WATER IS PRESENT. THE HOMEOWNER SHALL COMPARE THIS
DURING THE TWICE YEARLY INSPECTIONS, THE HOMEOWNER SHALL MEASURE THE DEPTH FROM THE TOP OF THE CLEANOUT TO THE TOP
TOP OF STONE WITHIN THE RECHARGE BASIN TO ESTABLISH A BASELINE. THIS INFORMATION SHALL BE GIVEN TO BOTH THE TOWN
AT THE END OF CONSTRUCTION, THE SITE CONTRACTOR SHALL MEASURE THE DEPTH FROM THE TOP OF THE CLEANOUT TO THE
THESE STRUCTURES MAY BE INSPECTED BY THE HOMEOWNER BUT WILL REQUIRE A PROFESSIONAL WITH A VACUUM TRUCK OR
FROM ENTERING THE STORM DRAINAGE SYSTEM(S). FURTHERMORE, THE DRAINAGE AND COLLECTION SYSTEM SHALL BE CLEANED AND
2. THROUGHOUT CONSTRUCTION, THE CONTRACTOR SHALL PROVIDE AND MAINTAIN ADEQUATE EROSION CONTROL TO PREVENT SILTATION
SITE DEVELOPMENT PLAN. FURTHERMORE, ALL STOCKPILES SHALL BE PARTIALLY ENCIRCLED ON THE DOWN GRADIENT SIDE WITH
1. ALL STOCKPILES OF CONSTRUCTION OR EARTHEN MATERIALS SHALL BE PLACED WITHIN THE "LIMITS OF WORK" AS DENOTED ON THE
GENERAL CONSTRUCTION NOTES
2. UNLESS OTHERWISE NOTED HEREON, ALL CONSTRUCTION METHODS AND INSPECTIONS SHALL COMPLY WITH THIS PLAN AND
ANY APPROVAL CONDITIONS OF THE TOWN AND ANY AND ALL OTHER STANDARDS OR REQUIREMENTS OF ANY AND ALL
3. EXISTING UTILITY LINES INDICATED OR NOTED ON THESE DRAWINGS ARE SHOWN AS OBTAINED FROM EXISTING INFORMATION
AND ARE ONLY APPROXIMATE IN LOCATION. THE CONTRACTOR SHALL VERIFY ALL UTILITY LINE LOCATIONS PRIOR TO
IS PRESENT, THE HOMEOWNER SHALL CONTACT A PROFESSIONAL TO REMOVE THE DEBRIS PRESENT WITHIN THE RECHARGE BASIN
MEASUREMENT TO THE ORIGINAL BASELINE. ONCE THIS HEIGHT IS 4" SHORTER THAN THE BASELINE ELEVATION OR STANDING WATER
30"
OPEN UNITS
SEE SCHEDULE FOR DETAILS ON CLOSE
D OR
ADS N-12 CORRUGATED
6"
24"
CRUSHED STONE
PIPE OR EQUIVALENT
DURING CONSTRUCTION
POST CONSTRUCTION
PROFESSIONAL.
AND THE HOMEOWNER.
3. RECHARGE BASINS:
1. ROOF COLLECTION SYSTEMS (i.e. GUTTER, DRIP EDGE STONE TRENCH):
OR EQUIVALENT TO INSPECT AND MAINTAIN THE STRUCTURES.
THESE SYSTEMS SHALL BE INSPECTED AND CLEANED 4 TIMES PER YEAR.
2. SURFACE COLLECTION SYSTEMS (i.e. AREA DRAIN, CATCHBASIN, TRENCH DRAIN):
EQUIVALENT TO REMOVE THE DEBRIS.
THESE SYSTEMS SHALL BE INSPECTED TWICE PER YEAR.
MAINTAINED THROUGHOUT CONSTRUCTION.
EROSION CONTROL (i.e. SILT FENCING, HAYBALES, ETC.).
STARTING THE SITE WORK.
AND PERFORM A SECOND INSPECTION.
1. ALL ELEVATIONS SHOWN HEREON ARE BASED ON ASSUMED BENCHMARK
PUBLIC OR PRIVATE UTILITY AGENCIES OR COMPANIES.
STONE INTERCEPTOR TRENCH DETAIL
CLEANOUT AND OUTLET CONTROL
FLOW
POLYLOK HEAVY COVER, OR EQUIVALENT
FLOW
A
FG
INTERCEPTOR TRENCH #1
(NOT TO SCALE)
INTERCEPTOR TRENCH #2
APPLIES ONLY AS ALTERNATE TO GUTTER/DOWNSPOUT
1 DETAILS 2-21-2019 JFF
PLAN VIEW
SIDE VIEW
GRASS
BACKFILL
CULTEC FILTER FABRIC
CRUSHED STONE
END VIEW
CULTEC RECHARGER 330
MINIMUM 3/4- 1 1/2 CRUSHED STONE
FILTER FABRIC
SCHEDULE OF ELEVATIONS
OUTFALL DIFFUSER
OUTFALL DIFFUSER DETAIL
OUTFALL DIFFUSER NOTES
INSPECTION
PORT
LEVEL SPREADER - 6"-8" RIP RAP
WITH "SNOUT" OR TEE
1. 30" MINI CATCH BASIN BY E.F. SHEA CONCRETE PRODUCTS,
INC. OF WILMINGTON, MA, OR EQUIVALENT.
2. REFER TO MANUFACTURER FOR RECOMMENDED INSTALLATION
GUIDELINES.
30" (ID) H-20 MINI CATCH BASIN/MANHOLE DETAIL
12" ABS PIPE
2.5'
OR RIM*
SCHEDULE OF ELEVATIONS
COMPACT GRAVEL BASE
COURSE, AS REQUIRED
BRICK & MORTAR
RIM
6"
GRATE
CAST IRON
2'
(TYP)
(HEIGHT VARIES)
BASE SECTION
(HEIGHT VARIES)
RISER SECTION
(TYP)
INV(o)
4"
SUMP
3"
4' MIN.
NOTES
(NOT TO SCALE)
CB-1
SWALE AND UNDER DRIVEWAY PIPE CAPACITY ANALYSIS
EXISTING BIT CONDRIVE
STST
4" SCH 40FRENCH DRAIN
SEE NOTE 4
1 DETAILS 2-21-2019 JFF
LOT 82.82 ACRES
EXISTING WELL
EXISTINGPAVEMENT
LOT 82.82 ACRES
SEE SYSTEM IN FILLNOTE
EXISTING WELL
EXISTING BIT CONDRIVE
ST
PCSTPC
2" SDR 21FORCE MAIN
4" SCH 40L=1.75S=2.3%
4" SCH 40L=14.0S=2.0%
LOT 82.82 ACRES
EXISTING WELL
EXISTINGPAVEMENT
Agtec Geocell Ground Grid Paver – (8.4ft x 27.4ft x 4in)
file:///E|/Agtec Geocell Ground Grid Paver – (8.4ft x 27.4ft x 4in).htm[3/8/2019 11:24:49 AM]
Questions? 888-683-8291 Mon - Fri 9-5ET
Agtec Geocell Ground Grid Paver – 4 Inch (8.4ft x 27.4ft)
$179.99
In Stock
SKU#: AGT-GS100
Agtec Geocell can be filled with base layers such as gravel, sand, rock and soil to keep the materialin place and greatly increase the strength of the base layer. Cells are 4 inches deep. Covers 230 sq.ft.10 Year Warranty.
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Agtec Geocell Ground Grid Paver – (8.4ft x 27.4ft x 4in)
file:///E|/Agtec Geocell Ground Grid Paver – (8.4ft x 27.4ft x 4in).htm[3/8/2019 11:24:49 AM]
Agtec Geocell Ground Grid Paver - 4 Inch(8.4ft x 27.4ft x 4in)
Features:
Paver size: 8.4' x 27.4' x 4"Covers appoximately 230 sq.ft. Cell size : 12.6” x 11.3” (320mm x 287mm)BlackUV StabilizedHDPE Textured to keep fill in place.Perforated cell walls for water drainageHigh tensile strength <1420N/10CM (320 lbf) .Saves money by greatly reducing the amount of fill needed to form a strong base.Great for driveways, roads, trails, parking lots, horse paddocks and animal containment areas. 4 Inch Geocell is recommended for most installations. 10 Year Warranty
Note: It is important for installations with traffic to use compacting gravel as fill, otherwise there can be a "quicksand effect". We highly recommend compacting 3/8" gravel and notpea gravel or any rounded fill.
The Agtec Geocell provides load support and stability to base layers of compacting gravel, rock, soil or sand. It greatly improves a layer's lateral strength and prevents fill from shiftingor being pushed sideways. The increase in strength allows for a decrease in the amount of material needed to form a solid base and saves users time, money, and resources.
The structural coefficient of a 4” layer of sandy soil is 5x greater with Agtec Geocell than without it, and is equivalent to 10” of crushed stone or 12.7” of sandy gravel.
The Geocell greatly reduces erosion from weather and heavy or repetitive traffic. The perforation pattern through each cell and weld allows water to drain freely without washing outthe material. The textured surface provides additional material retention. It is ideal for use in the construction of slopes and embankments prone to eroding, as well as driveways,roads, parking lots, horse paddocks and animal containment areas, trails and much more.
If being used for a driveway or road installation we highly recommend using 3/8" or 3/4" compacting gravel as fill, otherwise there can be a quicksand effect which can cause thegeocell to become pushed up out of the ground.
These Geocell’s are carefully manufactured under a quality management system that is ISO-9001:2008 CE certified.
Unit ship weight: 48 lbs
Installation:
Prepare the area by removing old soil, vegetation and debris.Put a sub-base layer if necessary and grade as necessary.Pin down one of our drainage fabrics or ground covers if necessary for separation and stability.Stake out the Geocell's using rebar, stakes or large anchor pins. Zip-tie, bolt or use pneumatic plier stapler to fasten multiple geocells together. If necessary cut Geocell ahead of time with a hand saw (recipricating saw works great).For a road or driveway fill the geocell with approximately 5" of 3/8" or 3/4" compacting gravel (not pea gravel, drain gravel or anything rounded) and rake level (1" excessabove geocell). For erosion control on embankments without traffic, rocks sand, mulch and other material can be usedYou may need to top up the gravel or other material after settling. Generously wetting the area and using a compactor is a highly step to reduce settling after installation. Remove any protruding rebars after installation.
Description
More Information
Agtec Geocell Ground Grid Paver – (8.4ft x 27.4ft x 4in)
file:///E|/Agtec Geocell Ground Grid Paver – (8.4ft x 27.4ft x 4in).htm[3/8/2019 11:24:49 AM]
Choosing the correct gravel:
It is extremely important to use compacting gravel as opposed to rounded gravel, on installations where traffic will be using the base, because there can be a "quicksand effect" thatpushes the geocell up and out of the ground. Some terms that indicate compacting gravel are: crushed rock, crushed limestone, crushed stone, crusher run, fines, stone dust,aggregate, road base, paver base and decomposed granite (mixed with sand or stone dust). Ideally, gravel should be 3/8" but 3/4" would also work. Check with your supplier that thegravel you are using will compact and is not rounded such as pea gravel or drainage gravel.
10 Year Limited WarrantyAgtec LLC warrants each Geocell section to be free from defects in materials and workmanship at the time of manufacture. Agtec LLC's exclusive liability under this warranty orotherwise will be to furnish without charge any section which proves to be defective under normal use and service during the 10-year period which begins on the date of shipment.Agtec LLC reserves the right to inspect any allegedly defective section in order to verify the defect and ascertain its cause.
This warranty does not cover defects attributable to causes or occurrences beyond Agtec LLC control and unrelated to the manufacturing process, including, but not limited to, abuse,misuse, mishandling, neglect, improper storage, improper installation, improper alteration or improper application.
AGTEC LLC MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, WRITTEN OR ORAL, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTIES OR MERCHANTABILITY OR FITNESS FORANY PARTICULAR PURPOSE, IN CONNECTION WITH THE GEOCELL SYSTEM. IN NO EVENT SHALL AGTEC LLC BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIALDAMAGES FOR THE BREACH OF ANY EXPRESS OR IMPLIED WARRANTY OR FOR ANY OTHER REASON, INCLUDING NEGLIGENCE, IN CONNECTION WITH THE GEOCELL SYSTEM.
Specifications:
Paver size: 8.4' x 27.4' x 4"Covers appoximately 230 sq.ft. Cell size : 12.6” x 11.3” (320mm x 287mm)Made of Black, UV Stabilized HDPE 1.5+/-0.1mm rhomboidal indentation texture to keep fill in place.Perforated cell walls for water drainageHigh tensile strength <1420N/10CM (320 lbf) .
...
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Agtec Geocell Ground Grid Paver – (8.4ft x 27.4ft x 4in)
file:///E|/Agtec Geocell Ground Grid Paver – (8.4ft x 27.4ft x 4in).htm[3/8/2019 11:24:49 AM]
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