Nashoba Engineering Associates

6 Beaver Brook Road

Littleton, MA 01460

978.501.3007

johnffield@aol.com

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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