HomeMy WebLinkAbout43.1_UF Pond MemoC:\Users\AlexFox\Pond and Stream Dropbox\Company Data\PSC\Projects\Urban Farms\Final Urban Farm pond memo w attachments 12-15-23.doc
P OND AND S TREAM C ONSULTING , I NC.
626 Ferguson Ave., Suite 1, Bozeman, MT 59718 Phone (406) 522-4056 info@pondandstream.com
Memorandum
To: Tom Berkley/Outlaw Real Estate Partners (Outlaw)
Cc: Jace Bovington/ Outlaw
From: Alex Fox/Pond and Stream Consulting, Inc.
Date: October 25, 2023
Re: Urban Farm Pond
As requested, this memo provides a brief discussion of facilities and maintenance associated with the
proposed Central Park Pond at Urban Farm. The intent of this memo is to alleviate concerns regarding
potential impact to adjacent resources (ground and surface water) and describe anticipated maintenance of
the pond (augmentation, elevation control and outflow, and vegetation management).
Permitting
The pond use will adhere to the groundwater certificate as approved by the Montana Department of Natural
Resources and Conservation (DNRC) and the project will comply with all Federal, State and Local
permitting requirements, including those set forth by Montana Fish, Wildlife and Parks (FWP) via their
Non-Commercial Private Fish Pond License (PPL) permitting process. As required by FWP and utilizing
the secured water right, the Owners will apply for a PPL to allow stocking of approved fish species
(rainbow or cutthroat trout). This application will require that the groundwater certificate for the well in
question lists “fishery” as a beneficial use and that the pond is adequately screened to “prevent escape of
stocked fish”. Based on the existing groundwater certificate, its listed beneficial use of “fishery” and
proposed outflow (reinjection), securing the PPL will be a formality. The Owner’s ability to provide a trout
fishery in the proposed pond will dissuade the “public” from introducing unwanted species, as a viable
fishery will exist. Further, if in the case of introduction of unwanted species, the pond’s lack of proximity
to perennial surface water and its installed screening mechanism will effectively make escape of any
species (legally stocked, or illegally introduced) impossible.
Pond Augmentation and Overflow
To optimize biologic production and integrity, the lined pond will be consistently maintained at its design
water surface elevation (DWSE) via augmentation using groundwater from the drilled well. This
groundwater will be introduced to the pond approximately five feet below DWSE on a predetermined
schedule using an installed time switch and appropriate valving. Groundwater will be introduced to the
pond with the intent of providing optimized biologic conditions for maintenance of a viable trout fishery,
while adhering to the conditions set forth by the DNRC via the groundwater certificate (water right 41H
30158959) for the drilled well. Augmentation will offset the annual evaporative loss from the water feature
and provide for exchange of just under one half the pond’s volume over the course of the year. Based on
the dimensions of the pond, along with its proposed maximum and average depths, and considering the
legal availability of water from the drilled well, introduction of groundwater as described will provide
conditions appropriate for stocking and overwintering of a reasonable population of rainbow or cutthroat
trout.
Central Park Pond at Urban Farm – Permitting, Maintenance and Management October 25, 2023
C:\Users\AlexFox\Pond and Stream Dropbox\Company Data\PSC\Projects\Urban Farms\Final Urban Farm pond memo w attachments 12-15-23.doc 2
The intermittent overflow of the pond will be directed through an AgriDrain inline water level control
structure (See Attachment A) and reinjected utilizing an engineered infiltration basin or drainfield (See
Attachment B). To eliminate concerns with thermal effect to adjacent groundwater, outflow will be taken
from a depth of approximately five feet below DWSE, thereby ensuring discharge of cool overflow from
near the pond’s “thermocline”. The temperature of this outflow is anticipated to fluctuate between 48 and
52 degrees Fahrenheit and should be nearly identical in temperature to the area’s groundwater. This
combined with the lack of surface water connection between the pond and area streams will eliminate the
possibility of adverse impacts to instream flows and/or adjacent fisheries.
Vegetation Management and Aeration
Pond construction will employ all techniques available (e.g. high average depth, limited shallow water,
shoreline development using appropriate wetland plants and aeration) to limit growth of nuisance
vegetation (algae and rooted aquatic macrophytes). As the proposed pond will be filled and maintained
using exempt groundwater from the nearby well, nutrients inherent in its inflow will be identical to the
groundwater receiving the outflow of the pond. Care will be taken to minimize intentional nutrient
introduction to the body of the pond and fertilizers, aquatic herbicides and algaecides will be expressly
prohibited for use in and/or on the pond or its adjacent landscape. Additionally, aeration will be employed
to both ensure overwintering of stocked trout, and to minimize growth of nuisance aquatic by reducing
anaerobic conditions in the pond via introduction of ambient air at depth during certain times of the year.
This aeration will be conducted using an installed time switch to provide for nighttime aeration during
warmer months (typically mid-May through late September) and consistent aeration the balance of the year.
Central Park Pond at Urban Farm – Permitting, Maintenance and Management October 25, 2023
C:\Users\AlexFox\Pond and Stream Dropbox\Company Data\PSC\Projects\Urban Farms\Final Urban Farm pond memo w attachments 12-15-23.doc 3
Summary
To summarize, the proposed pond use (pond size and water use) at Urban Farm will adhere to the
groundwater certificate as approved by the DNRC (Water Right 41H 30158959) and the project will
comply with all Federal, State and Local permitting requirements, including those set forth by FWP via
their PPL permitting process. Additionally, construction and maintenance of the feature will be conducted
in an effort to minimize long-term maintenance concerns and minimize opportunities for deleterious effects
to adjacent aquatic resources
Please feel free to contact me if you have any questions, or if I can provide clarifications or additional
information. Thank you and I look forward to speaking with you soon.
Sincerely,
Alex Fox
Principal/Resource Engineer
Enclosures: Attachment A: Inline Water Level Control Structure Specifications and Details
Attachment B: StormTech Infiltration Chamber Specifications and Details
ATTACHMENT A
SPECIFICATIONS AND DETAILS
AGRI DRAIN INLINE WATER LEVEL CONTROL STRUCTURE
America's Most Complete Supplier of Water Management ProductsP.O. Box 458 - 1462 340th St. - Adair, IA 50002 - Ph: 1-800-232-4742 - Fax 1-800-282-3353 - www.agridrain.comUNLESS OTHERWISE SPECIFIED.X ±.06.XX ±.03.XXX ±.010ANGLES ±2°BREAK ALL SHARP CORNERS.ALL INFORMATION CONTAINED IN THISDOCUMENT IS PROPRIETARY TO AGRIDRAIN CORP. DUPLICATION ORTRANSMITTAL OF THIS DOCUMENT ISSTRICTLY PROHIBITED WITHOUT THEWRITTEN CONSENT OF AGRI DRAIN CORP.ALL DIMENSIONS ARE IN INCHES.Agri DrainCORPORATION1.0065.00INLET
OUTLET
Ø11.3527.64DRAWN WITH 1002-1010 COUPLER10.63ALTERNATIVECOUPLERS1056-101011.121051-101011.7711.8712.0071.0059.0012.0035.505.007.00MOLDED BOARDS13.7515.3815.1815.0010.6017.5017.3115.9512.73INLINE 6' X 10" WCSALL INLINE STRUCTURES THAT ARE 10" PIPE SIZE AND LARGER AND FROM THE BOTTOM. EFFECTIVE 10/24/16NOTE:5.69OVER 6' TALL SHALL HAVE 6" SCREW SPACING ON THE TRACKS UP 3'
Inline Water Level Control StructureTM
Available in manual or automated.
Constructed of rugged ½" PVC with lockable plastic lid.
Stainless steel screws and custom anodized aluminum corner
extrusions used for strength and durability.*
Flexible couplers allow PVC, plastic pipe, or other materials to
be easily attached. (Please specify type of pipe when ordering.)
Rugged injection molded stoplogs in 5" and 7" heights for
adjustability (included in structures with 4" through 12"
pipe sizes).
PVC stoplogs with metal hooks in 5" and 7" heights for
adjustability (included in structures with 15" through 24"
pipe sizes).
Stoplog maintenance recommended: Remove stoplogs
and grease seal with Ultra Lube (included). Ensure there
is no debris in the tracks or along the bottom of the structure.
Replace stoplogs after greasing, ensuring bottom stoplog is
installed first.
To minimize seepage, align stoplogs firmly against one side
of the stoplog track.
Stoplogs must remain in track during structure installation.
Structures are intended for gravity flow; some seepage
may occur.
5-year warranty on all standard structures.
*For water that is caustic, acid, corrosive, salt, or pH below 5 pH or above 9 pH,
please notify us of your requirements to ensure structures are built with compatible
hardware. For these applications, Agri Drain recommends stainless steel.
Stoplog Retainer
Hold extra stoplogs up &
out of the way!
Stainless steel retainer
hooks to lowest
stoplog that you want
to hold up within your
Inline Water Level
Control StructureTM.
Inline Water Level Control StructureTM
Pipe
Size
Available
Heights Width Depth
4" 2' - 12' 8" 10"
6" 2' - 12' 8" 10"
8" 2' - 12' 115/8" 12"
10" 2' - 12' 14" 16"
12" 2' - 12' 16" 20"
15" 2' - 12' 20" 24"
18" 2' - 12' 24" 28"
24" 3' - 10' 31" 39"
PO Box 458 ∙ 1462 340th Street ∙ Adair, Iowa 50002
Phone: 1-800-232-4742 ∙ Fax: 1-800-282-3353
www.agridrain.com ∙ email: info@agridrain.com
Stoplog seal
ensures a tight fit to
prevent leakage.
Comes with a
handle to install and
remove stoplogs.
Manufactured by:
Rugged injection molded
stoplogs used in structures
with 4", 6", 8", 10", and 12"
pipe sizes.
PVC stoplogs with
stainless steel lifting
hooks used in structures
with 15", 18", and 24"
pipe sizes.
US Patent No. 6,715,508 B2
US Patent No. 6,786,234 B2
Canadian Patent No. 2,403,456
Canadian Patent No. 2,466,976
Call for details
on Automated.
ATTACHMENT B
SPECIFICATIONS AND DETAILS
STORMTECH INFOLTRATION CHAMBERS
SCALE: N.T.S.748" DIA. CURB INLET FOREBAYSCALE: N.T.S.636" CURB CUTASPHALTRIP-RAPPLAN VIEWCONCRETE APRONCONCRETE APRONFLUSH WITH GRATEEND CURBCROSS SECTION VIEW A-AAASECTION VIEW24" CURBASPHALT24" GRATE RIP RAP48" DIA. FLOW-OVER FOREBAY MANHOLE 48"ØRECTANGULARGRADE RINGS
48" ØCONTRACTOR TOGROUT ANNULARSPACES3" TALL X 12"WIDE SLOTS 4ROWS OF 3EACH FORTOTAL OF 12.RECTANGULAR
GRADE RINGS3" TALL X 12"WIDE SLOTS 4ROWS OF 3EACH FORTOTAL OF 12.6" PRECASTSOLIDBASE6" PRECASTSOLID BASE4 FT DEPTH TO PROVIDE
PRETREATMENT
4 FT DEPTH TO PROVIDEPRETREATMENT
INLET CASTINGEJIW 7030 O.A.E.TBC ELEV.RIM ELEV.RIM ELEV.PLAN VIEWSECTION VIEW1" TO 1 12 " WASHED ROCK ONUNDISTURBED SOIL A MINIMUMOF 12" THICK1" TO 1 12 " WASHEDROCK ONUNDISTURBEDSOIL A MINIMUM OF12" THICKTOP SLOT TO BELOCATED 2' BELOW TOPOF MANHOLE
MATERIAL LOCATIONDESCRIPTIONAASHTO MATERIALCLASSIFICATIONSCOMPACTION / DENSITY REQUIREMENTDFINAL FILL: FILL MATERIAL FOR LAYER 'D' STARTS FROM THE TOP OF THE'C' LAYER TO THE BOTTOM OF FLEXIBLE PAVEMENT OR UNPAVEDFINISHED GRADE ABOVE. NOTE THAT PAVEMENT SUBBASE MAY BE PARTOF THE 'D' LAYERANY SOIL/ROCK MATERIALS, NATIVE SOILS, OR PER ENGINEER'S PLANS.CHECK PLANS FOR PAVEMENT SUBGRADE REQUIREMENTS.N/APREPARE PER SITE DESIGN ENGINEER'S PLANS. PAVEDINSTALLATIONS MAY HAVE STRINGENT MATERIAL ANDPREPARATION REQUIREMENTS.CINITIAL FILL: FILL MATERIAL FOR LAYER 'C' STARTS FROM THE TOP OFTHE EMBEDMENT STONE ('B' LAYER) TO 14" (355 mm) ABOVE THE TOP OFTHE CHAMBER. NOTE THAT PAVEMENT SUBBASE MAY BE A PART OF THE'C' LAYER.GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35% FINES ORPROCESSED AGGREGATE. MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU OF THISLAYER.AASHTO M145¹A-1, A-2-4, A-3ORAASHTO M43¹3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10BEGIN COMPACTIONS AFTER 12" (300 mm) OF MATERIALOVER THE CHAMBERS IS REACHED. COMPACT ADDITIONALLAYERS IN 6" (150 mm) MAX LIFTS TO A MIN. 95% PROCTORDENSITY FOR WELL GRADED MATERIAL AND 95% RELATIVEDENSITY FOR PROCESSED AGGREGATE MATERIALS. ROLLERGROSS VEHICLE WEIGHT NOT TO EXCEED 12,000 lbs (53 kN).DYNAMIC FORCE NOT TO EXCEED 20,000 lbs (89 kN).BEMBEDMENT STONE: FILL SURROUNDING THE CHAMBERS FROM THEFOUNDATION STONE ('A' LAYER) TO THE 'C' LAYER ABOVE.CLEAN, CRUSHED, ANGULAR STONEAASHTO M43¹3, 357, 4, 467, 5, 56, 57NO COMPACTION REQUIRED.AFOUNDATION STONE: FILL BELOW CHAMBERS FROM THE SUBGRADE UPTO THE FOOT (BOTTOM) OF THE CHAMBER.CLEAN, CRUSHED, ANGULAR STONEAASHTO M43¹3, 357, 4, 467, 5, 56, 57PLATE COMPACT OR ROLL TO ACHIEVE A FLAT SURFACE.2,3PLEASE NOTE:1.THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN, CRUSHED, ANGULAR. FOR EXAMPLE, A SPECIFICATION FOR #4 STONE WOULD STATE: "CLEAN, CRUSHED, ANGULAR NO. 4 (AASHTO M43) STONE".2.STORMTECH COMPACTION REQUIREMENTS ARE MET FOR 'A' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 6" (150 mm) (MAX) LIFTS USING TWO FULL COVERAGES WITH A VIBRATORY COMPACTOR.3.WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION, FOR STANDARD DESIGN LOAD CONDITIONS, A FLAT SURFACE MAY BE ACHIEVED BY RAKING OR DRAGGING WITHOUT COMPACTION EQUIPMENT. FOR SPECIAL LOAD DESIGNS, CONTACT STORMTECH FORCOMPACTION REQUIREMENTS.4.ONCE LAYER 'C' IS PLACED, ANY SOIL/MATERIAL CAN BE PLACED IN LAYER 'D' UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASE SOILS CAN BE USED TO REPLACE THE MATERIAL REQUIREMENTS OF LAYER 'C' OR 'D' AT THE SITE DESIGN ENGINEER'S DISCRETION.ACCEPTABLE FILL MATERIALS: STORMTECH SC-160LP CHAMBER SYSTEMSNOTES:1.CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS".2.CHAMBERS SHALL BE DESIGNED, TESTED AND ALLOWABLE LOAD CONFIGURATIONS DETERMINED IN ACCORDANCE WITH ASTM F2787, "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTIONCHAMBERS". LOAD CONFIGURATIONS SHALL INCLUDE: 1) INSTANTANEOUS (<1 MIN) AASHTO DESIGN TRUCK LIVE LOAD ON MINIMUM COVER 2) MAXIMUM PERMANENT (75-YR) COVER LOAD AND 3) ALLOWABLE COVER WITH PARKED (1-WEEK) AASHTO DESIGN TRUCK.3.THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THE SUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE WITH CONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURECONDITIONS.4.PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THE EXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATION WALLS.5.REQUIREMENTS FOR HANDLING AND INSTALLATION:·TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS·TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 1.5”·TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT SHALL BE GREATER THAN OR EQUAL TO 400 LBS/FT/%. THE ASC IS DEFINED IN SECTION 6.2.8 OF ASTM F2418. AND b) TO RESIST CHAMBERDEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F / 23° C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS.PART #STUBASC160EPP6" (150 mm)0.66" (16 mm)8" (200 mm)0.80" (20 mm)SC160EPP088" (200 mm)0.96" (24 mm)ALL STUBS ARE PLACED AT BOTTOM OF END CAP SUCH THATTHE OUTSIDE DIAMETER OF THE STUB IS FLUSH WITH THEBOTTOM OF THE END CAP. FOR ADDITIONAL INFORMATIONCONTACT STORMTECH AT 1-888-892-2694.NOTE: ALL DIMENSIONS ARE NOMINALNOMINAL CHAMBER SPECIFICATIONSSIZE (W X H X INSTALLED LENGTH)25.0" X 12.0" X 85.4" (635 mm X 305 mm X 2169 mm)CHAMBER STORAGE6.85 CUBIC FEET (0.19 m³)MINIMUM INSTALLED STORAGE*16.0 CUBIC FEET (0.45 m³)WEIGHT24.0 lbs.(10.9 kg)*ASSUMES 6" (152 mm) ABOVE, 6" (152 mm) BELOW, AND STONE BETWEEN CHAMBERS WITH 40%STONE POROSITY.BUILD ROW IN THISDIRECTIONSTART ENDSC-160StormTech6" N128" N12SC-160StormTechOVERLAP NEXT CHAMBER HERE(OVER SMALL CORRUGATION)25.0"(635 mm)12.0"(305 mm)90.7" (2304 mm) ACTUAL LENGTH85.4" (2169 mm) INSTALLED LENGTH4.4"(112 mm)A11.7"(297 mm)18.6"(472 mm)DCBA*TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVEDINSTALLATIONS WHERE RUTTING FROM VEHICLES MAYOCCUR, INCREASE COVER TO 20" (510 mm).6" N1
2 8" N1
2
SC-160StormTech 6" N1
2 8" N1
2
SC-160StormTech 6" N1
2 8" N1
2
SC-160StormTech 6" N1
2 8" N1
2
SC-160StormTech
6" N
1
8" N1
2
SC-160StormTech
PAVEMENT LAYER (DESIGNEDBY SITE DESIGN ENGINEER)SUBGRADE SOILS(SEE NOTE 3)PERIMETER STONE(SEE NOTE 4)EXCAVATION WALL(CAN BE SLOPED OR VERTICAL)SC-160LPEND CAPNO SPACING REQUIREDBETWEEN CHAMBERS12"(300 mm)14"(350 mm)MIN*10'(3.0 m)MAX6" (150 mm) MIN12" (300 mm) MIN25"(635 mm)12" (300 mm)TYPDEPTH OF BASE STONE TO BE DETERMINEDBY SITE DESIGN ENGINEER 6" (150 mm) MINSCALE: N.T.S.8PARK G RECREATION POND OVERFLOW- PLAN VIEW & TECHNICAL SPECIFICATIONSSCALE: N.T.S.9SC-160LP CROSS SECTION DETAILC4.17AS NOTEDSTORM DETAILS(CONT.)MALHEC Nov 21, 2023 - 1:11pmCAD FILE: M:\203430\Drawings\PHASE 2\CONSTRUCTION DRAWINGS\4.10 - STORM DETAILS.dwg
REVISIONSDATEPROJECT NUMBERHYALITE Engineers, PLLC2304 N 7th Ave. Ste. LBozeman, MT 59715Tel: (406) 587.2781w w w . hyaliteeng. comFax: (406) 522.92252018URBAN + FARM BOZEMAN, MT11.17.2023203430PRELIMINARY 22x34 ORIGINALSSCALESHEET TITLEDESIGN BYLAUREL PARKWAY LLC11 LONE PEAK DRIVEBIG SKY, MT 59716PHASE 2 MONTANABRETT C.No. 29106 PEMEGAARDPEFORSOILNASREN
I
G
ENE
P
R
E
L
I
M
I
N
A
R
Y
8.33'28.93'34.39'
NOT TO SCALEUNDERDRAIN DETAIL5SC-160LP TECHNICAL SPECIFICATIONS24" PVC INSPECTION PORT DETAIL(SC SERIES CHAMBER)4SC-160LP CROSS SECTION DETAIL1SC-160LP ISOLATOR ROW PLUS DETAIL3MATERIAL LOCATIONDESCRIPTIONAASHTO MATERIALCLASSIFICATIONSCOMPACTION / DENSITY REQUIREMENTDFINAL FILL: FILL MATERIAL FOR LAYER 'D' STARTS FROM THE TOPOF THE 'C' LAYER TO THE BOTTOM OF FLEXIBLE PAVEMENT ORUNPAVED FINISHED GRADE ABOVE. NOTE THAT PAVEMENTSUBBASE MAY BE PART OF THE 'D' LAYERANY SOIL/ROCK MATERIALS, NATIVE SOILS, OR PER ENGINEER'S PLANS.CHECK PLANS FOR PAVEMENT SUBGRADE REQUIREMENTS.N/APREPARE PER SITE DESIGN ENGINEER'S PLANS. PAVEDINSTALLATIONS MAY HAVE STRINGENT MATERIAL ANDPREPARATION REQUIREMENTS.CINITIAL FILL: FILL MATERIAL FOR LAYER 'C' STARTS FROM THE TOPOF THE EMBEDMENT STONE ('B' LAYER) TO 14" (355 mm) ABOVE THETOP OF THE CHAMBER. NOTE THAT PAVEMENT SUBBASE MAY BE APART OF THE 'C' LAYER.GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35% FINES ORPROCESSED AGGREGATE. MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU OF THISLAYER.AASHTO M145¹A-1, A-2-4, A-3ORAASHTO M43¹3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10BEGIN COMPACTIONS AFTER 12" (300 mm) OF MATERIAL OVERTHE CHAMBERS IS REACHED. COMPACT ADDITIONAL LAYERS IN6" (150 mm) MAX LIFTS TO A MIN. 95% PROCTOR DENSITY FORWELL GRADED MATERIAL AND 95% RELATIVE DENSITY FORPROCESSED AGGREGATE MATERIALS. ROLLER GROSSVEHICLE WEIGHT NOT TO EXCEED 12,000 lbs (53 kN). DYNAMICFORCE NOT TO EXCEED 20,000 lbs (89 kN).BEMBEDMENT STONE: FILL SURROUNDING THE CHAMBERS FROMTHE FOUNDATION STONE ('A' LAYER) TO THE 'C' LAYER ABOVE.CLEAN, CRUSHED, ANGULAR STONEAASHTO M43¹3, 357, 4, 467, 5, 56, 57NO COMPACTION REQUIRED.AFOUNDATION STONE: FILL BELOW CHAMBERS FROM THESUBGRADE UP TO THE FOOT (BOTTOM) OF THE CHAMBER.CLEAN, CRUSHED, ANGULAR STONEAASHTO M43¹3, 357, 4, 467, 5, 56, 57PLATE COMPACT OR ROLL TO ACHIEVE A FLAT SURFACE.2,3PLEASE NOTE:1.THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN, CRUSHED, ANGULAR. FOR EXAMPLE, A SPECIFICATION FOR #4 STONE WOULD STATE: "CLEAN, CRUSHED, ANGULAR NO. 4 (AASHTO M43) STONE".2.STORMTECH COMPACTION REQUIREMENTS ARE MET FOR 'A' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 6" (150 mm) (MAX) LIFTS USING TWO FULL COVERAGES WITH A VIBRATORY COMPACTOR.3.WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION, FOR STANDARD DESIGN LOAD CONDITIONS, A FLAT SURFACE MAY BE ACHIEVED BY RAKING OR DRAGGING WITHOUT COMPACTION EQUIPMENT. FOR SPECIAL LOAD DESIGNS, CONTACT STORMTECH FORCOMPACTION REQUIREMENTS.4.ONCE LAYER 'C' IS PLACED, ANY SOIL/MATERIAL CAN BE PLACED IN LAYER 'D' UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASE SOILS CAN BE USED TO REPLACE THE MATERIAL REQUIREMENTS OF LAYER 'C' OR 'D' AT THE SITE DESIGN ENGINEER'S DISCRETION.ACCEPTABLE FILL MATERIALS: STORMTECH SC-160LP CHAMBER SYSTEMSNOTES:1.CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS".2.CHAMBERS SHALL BE DESIGNED, TESTED AND ALLOWABLE LOAD CONFIGURATIONS DETERMINED IN ACCORDANCE WITH ASTM F2787, "STANDARD PRACTICE FOR STRUCTURAL DESIGN OFTHERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". LOAD CONFIGURATIONS SHALL INCLUDE: 1) INSTANTANEOUS (<1 MIN) AASHTO DESIGN TRUCK LIVE LOAD ON MINIMUMCOVER 2) MAXIMUM PERMANENT (75-YR) COVER LOAD AND 3) ALLOWABLE COVER WITH PARKED (1-WEEK) AASHTO DESIGN TRUCK.3.THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THE SUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE WITHCONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURE CONDITIONS.4.PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THE EXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATION WALLS.5.REQUIREMENTS FOR HANDLING AND INSTALLATION:·TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS·TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 1.5”·TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT AS DEFINED IN SECTION 6.2.8 OF ASTM F2418 SHALL BE GREATER THAN OR EQUAL TO400 LBS/FT/%. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F / 23° C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLDOR YELLOW COLORS.DCB*TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVEDINSTALLATIONS WHERE RUTTING FROM VEHICLES MAYOCCUR, INCREASE COVER TO 20" (510 mm).14"(350 mm)MIN*10'(3.0 m)MAX6" (150 mm)MIN12" (300 mm) MINADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE ALL AROUNDCLEAN CRUSHED, ANGULAR STONE IN A & B LAYERS25"(635 mm)12" (300 mm)MINDEPTH OF BASE STONE TO BE DETERMINEDBY SITE DESIGN ENGINEER 6" (150 mm) MINAEXCAVATION WALL(CAN BE SLOPED OR VERTICAL)PERIMETER STONE(SEE NOTE 4)SC-160LPEND CAPSUBGRADE SOILS(SEE NOTE 3)NO SPACING REQUIREDBETWEEN CHAMBERSPAVEMENT LAYER (DESIGNEDBY SITE DESIGN ENGINEER)12"(305 mm)**THIS CROSS SECTION DETAIL REPRESENTSMINIMUM REQUIREMENTS FOR INSTALLATION.PLEASE SEE THE LAYOUT SHEET(S) FORPROJECT SPECIFIC REQUIREMENTS.SUMP DEPTH TBD BYSITE DESIGN ENGINEER(24" [600 mm] MIN RECOMMENDED)CATCH BASINOR MANHOLESTORMTECH HIGHLY RECOMMENDSFLEXSTORM INSERTS IN ANY UPSTREAMSTRUCTURES WITH OPEN GRATESSC-160LP CHAMBER8" (200 mm) HDPE ACCESS PIPE REQUIREDUSE 8" OPEN END CAP PART #: SC160IEPP08OPTIONAL INSPECTION PORTSC-160LP END CAPONE LAYER OF ADSPLUS125 WOVEN GEOTEXTILE BETWEENFOUNDATION STONE AND CHAMBERS4' (1.2 m) MIN WIDE CONTINUOUS FABRIC WITHOUT SEAMSWEIRWEIR HEIGHT TBD BYSITE DESIGN ENGINEERINSPECTION & MAINTENANCESTEP 1)INSPECT ISOLATOR ROW PLUS FOR SEDIMENTA.INSPECTION PORTS (IF PRESENT)A.1.REMOVE/OPEN LID ON NYLOPLAST INLINE DRAINA.2.REMOVE AND CLEAN FLEXSTORM FILTER IF INSTALLEDA.3.USING A FLASHLIGHT AND STADIA ROD, MEASURE DEPTH OF SEDIMENT AND RECORD ON MAINTENANCE LOGA.4.LOWER A CAMERA INTO ISOLATOR ROW PLUS FOR VISUAL INSPECTION OF SEDIMENT LEVELS (OPTIONAL)A.5.IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3.B.ALL ISOLATOR PLUS ROWSB.1.REMOVE COVER FROM STRUCTURE AT UPSTREAM END OF ISOLATOR ROW PLUSB.2.USING A FLASHLIGHT, INSPECT DOWN THE ISOLATOR ROW PLUS THROUGH OUTLET PIPEi)MIRRORS ON POLES OR CAMERAS MAY BE USED TO AVOID A CONFINED SPACE ENTRYii)FOLLOW OSHA REGULATIONS FOR CONFINED SPACE ENTRY IF ENTERING MANHOLEB.3.IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3.STEP 2)CLEAN OUT ISOLATOR ROW PLUS USING THE JETVAC PROCESSA.A FIXED CULVERT CLEANING NOZZLE WITH REAR FACING SPREAD OF 45" (1.1 m) OR MORE IS PREFERREDB.APPLY MULTIPLE PASSES OF JETVAC UNTIL BACKFLUSH WATER IS CLEANC.VACUUM STRUCTURE SUMP AS REQUIREDSTEP 3)REPLACE ALL COVERS, GRATES, FILTERS, AND LIDS; RECORD OBSERVATIONS AND ACTIONS.STEP 4)INSPECT AND CLEAN BASINS AND MANHOLES UPSTREAM OF THE STORMTECH SYSTEM.NOTES1.INSPECT EVERY 6 MONTHS DURING THE FIRST YEAR OF OPERATION. ADJUST THE INSPECTION INTERVAL BASED ON PREVIOUSOBSERVATIONS OF SEDIMENT ACCUMULATION AND HIGH WATER ELEVATIONS.2.CONDUCT JETTING AND VACTORING ANNUALLY OR WHEN INSPECTION SHOWS THAT MAINTENANCE IS NECESSARY.NOTE:INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION CREST.STORMTECH CHAMBERCONCRETE COLLARPAVEMENT12" (300 mm) MIN WIDTHCONCRETE SLAB6" (150 mm) MIN THICKNESS8" NYLOPLAST INSPECTION PORTBODY (PART# 2708AG4IPKIT) ORTRAFFIC RATED BOX W/SOLIDLOCKING COVERCONCRETE COLLAR NOT REQUIREDFOR UNPAVED APPLICATIONS4" (100 mm)SDR 35 PIPE4" (100 mm) INSERTA TEETO BE CENTERED ONCORRUGATION CRESTPART #STUBASC160EPP6" (150 mm)0.66" (16 mm)8" (200 mm)0.80" (20 mm)SC160EPP088" (200 mm)0.96" (24 mm)ALL STUBS ARE PLACED AT BOTTOM OF END CAP SUCH THAT THE OUTSIDEDIAMETER OF THE STUB IS FLUSH WITH THE BOTTOM OF THE END CAP. FORADDITIONAL INFORMATION CONTACT STORMTECH AT 1-888-892-2694.NOTE: ALL DIMENSIONS ARE NOMINALNOMINAL CHAMBER SPECIFICATIONSSIZE (W X H X INSTALLED LENGTH)25.0" X 12.0" X 85.4" (635 mm X 305 mm X 2169 mm)CHAMBER STORAGE6.85 CUBIC FEET (0.19 m³)MINIMUM INSTALLED STORAGE*16.0 CUBIC FEET (0.45 m³)WEIGHT24.0 lbs.(10.9 kg)*ASSUMES 6" (152 mm) ABOVE, 6" (152 mm) BELOW, AND STONE BETWEEN CHAMBERS WITH 40% STONE POROSITY.25.0"(635 mm)12.0"(305 mm)90.7" (2304 mm) ACTUAL LENGTH85.4" (2169 mm) INSTALLED LENGTHOVERLAP NEXT CHAMBER HERE(OVER SMALL CORRUGATION)BUILD ROW IN THIS DIRECTIONSTART END4.4"(112 mm)A11.7"(297 mm)18.6"(472 mm)AABBSECTION A-ASECTION B-BNUMBER AND SIZE OF UNDERDRAINS PER SITE DESIGN ENGINEER4" (100 mm) TYP FOR SC-310 & SC-160LP SYSTEMS6" (150 mm) TYP FOR SC-740, DC-780, MC-3500, MC-4500 & MC-7200 SYSTEMSOUTLET MANIFOLDSTORMTECHEND CAPSTORMTECHCHAMBERSSTORMTECHCHAMBERSTORMTECHEND CAPDUAL WALLPERFORATEDHDPEUNDERDRAINADS GEOSYNTHETICS 601TNON-WOVEN GEOTEXTILEADS GEOSYNTHETICS 601TNON-WOVEN GEOTEXTILEFOUNDATION STONEBENEATH CHAMBERSFOUNDATION STONEBENEATH CHAMBERSSC-160LP
STANDARD DETAILS FOR STORMTECHINSTALLATION INSTRUCTIONSVISIT OUR APPSiteAssistAdvanced Drainage Systems, Inc.SC-160LP STORMTECH CHAMBER SPECIFICATIONS1.CHAMBERS SHALL BE STORMTECH SC-160LP.2.CHAMBERS SHALL BE ARCH-SHAPED AND SHALL BE MANUFACTURED FROM VIRGIN, IMPACT-MODIFIED POLYPROPYLENECOPOLYMERS.3.CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP)CORRUGATED WALL STORMWATER COLLECTION CHAMBERS".4.CHAMBER ROWS SHALL PROVIDE CONTINUOUS, UNOBSTRUCTED INTERNAL SPACE WITH NO INTERNAL SUPPORTS THAT WOULDIMPEDE FLOW OR LIMIT ACCESS FOR INSPECTION.5.THE STRUCTURAL DESIGN OF THE CHAMBERS, THE STRUCTURAL BACKFILL, AND THE INSTALLATION REQUIREMENTS SHALLENSURE THAT THE LOAD FACTORS SPECIFIED IN THE AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS, SECTION 12.12, ARE METFOR: 1) LONG-DURATION DEAD LOADS AND 2) SHORT-DURATION LIVE LOADS, BASED ON THE AASHTO DESIGN TRUCK WITHCONSIDERATION FOR IMPACT AND MULTIPLE VEHICLE PRESENCES.6.CHAMBERS SHALL BE DESIGNED, TESTED AND ALLOWABLE LOAD CONFIGURATIONS DETERMINED IN ACCORDANCE WITH ASTMF2787, "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTIONCHAMBERS". LOAD CONFIGURATIONS SHALL INCLUDE: 1) INSTANTANEOUS (<1 MIN) AASHTO DESIGN TRUCK LIVE LOAD ONMINIMUM COVER 2) MAXIMUM PERMANENT (75-YR) COVER LOAD AND 3) ALLOWABLE COVER WITH PARKED (1-WEEK) AASHTODESIGN TRUCK.7.REQUIREMENTS FOR HANDLING AND INSTALLATION:·TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL,INTERLOCKING STACKING LUGS.·TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BELESS THAN 1.5”.·TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT SHALL BEGREATER THAN OR EQUAL TO 400 LBS/FT/%. THE ASC IS DEFINED IN SECTION 6.2.8 OF ASTM F2418. AND b) TO RESISTCHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F / 23° C), CHAMBERS SHALLBE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS.8.ONLY CHAMBERS THAT ARE APPROVED BY THE SITE DESIGN ENGINEER WILL BE ALLOWED. UPON REQUEST BY THE SITE DESIGNENGINEER OR OWNER, THE CHAMBER MANUFACTURER SHALL SUBMIT A STRUCTURAL EVALUATION FOR APPROVAL BEFOREDELIVERING CHAMBERS TO THE PROJECT SITE AS FOLLOWS:·THE STRUCTURAL EVALUATION SHALL BE SEALED BY A REGISTERED PROFESSIONAL ENGINEER.·THE STRUCTURAL EVALUATION SHALL DEMONSTRATE THAT THE SAFETY FACTORS ARE GREATER THAN OR EQUAL TO 1.95FOR DEAD LOAD AND 1.75 FOR LIVE LOAD, THE MINIMUM REQUIRED BY ASTM F2787 AND BY SECTIONS 3 AND 12.12 OF THEAASHTO LRFD BRIDGE DESIGN SPECIFICATIONS FOR THERMOPLASTIC PIPE.·THE TEST DERIVED CREEP MODULUS AS SPECIFIED IN ASTM F2418 SHALL BE USED FOR PERMANENT DEAD LOAD DESIGNEXCEPT THAT IT SHALL BE THE 75-YEAR MODULUS USED FOR DESIGN.9.CHAMBERS AND END CAPS SHALL BE PRODUCED AT AN ISO 9001 CERTIFIED MANUFACTURING FACILITY.IMPORTANT - NOTES FOR THE BIDDING AND INSTALLATION OF THE SC-160LP SYSTEM1.STORMTECH SC-160LP CHAMBERS SHALL NOT BE INSTALLED UNTIL THE MANUFACTURER'S REPRESENTATIVE HAS COMPLETED APRE-CONSTRUCTION MEETING WITH THE INSTALLERS.2.STORMTECH SC-160LP CHAMBERS SHALL BE INSTALLED IN ACCORDANCE WITH THE "STORMTECH SC-160LP CONSTRUCTIONGUIDE".3.FOUNDATION STONE AND EMBEDMENT STONE SURROUNDING CHAMBERS MUST BE A CLEAN, CRUSHED, ANGULAR STONE;AASHTO M43 #3,357, 4, 467, 5, 56, OR 57.4.THE FOUNDATION STONE SHALL BE LEVELED AND COMPACTED PRIOR TO PLACING CHAMBERS.5.THE DEPTH OF FOUNDATION STONE SHALL BE DETERMINED BASED ON THE SUBGRADE BEARING CAPACITY PROVIDED BY THESITE DESIGN ENGINEER.6.THE CONTRACTOR MUST REPORT ANY DISCREPANCIES CONCERNING CHAMBER FOUNDATION DESIGN AND SUBGRADE BEARINGCAPACITIES TO THE SITE DESIGN ENGINEER.7.JOINTS BETWEEN CHAMBERS SHALL BE PROPERLY SEATED PRIOR TO PLACING STONE.8.CHAMBERS SHALL BE INSTALLED "TOE TO TOE". NO ADDITIONAL SPACING BETWEEN ROWS IS REQUIRED.9.STORMTECH RECOMMENDS 3 BACKFILL METHODS:·STONESHOOTER LOCATED OFF THE CHAMBER BED.·BACKFILL AS ROWS ARE BUILT USING AN EXCAVATOR ON THE FOUNDATION STONE OR SUBGRADE.·BACKFILL FROM OUTSIDE THE EXCAVATION USING A LONG BOOM HOE OR EXCAVATOR.10.ADS RECOMMENDS THE USE OF "FLEXSTORM CATCH IT" INSERTS DURING CONSTRUCTION FOR ALL INLETS TO PROTECT THESUBSURFACE STORMWATER MANAGEMENT SYSTEM FROM CONSTRUCTION SITE RUNOFF.NOTES FOR CONSTRUCTION EQUIPMENT1.THE USE OF CONSTRUCTION EQUIPMENT OVER SC-160LP CHAMBERS IS LIMITED:·NO EQUIPMENT IS ALLOWED ON BARE CHAMBERS.·NO RUBBER TIRED LOADERS, DUMP TRUCKS, OR EXCAVATORS ARE ALLOWED UNTIL PROPER FILL DEPTHS ARE REACHED INACCORDANCE WITH THE "STORMTECH SC-160LP CONSTRUCTION GUIDE".·WEIGHT LIMITS FOR CONSTRUCTION EQUIPMENT CAN BE FOUND IN THE "STORMTECH SC-106LP CONSTRUCTION GUIDE".2.FULL 36" (900 mm) OF STABILIZED COVER MATERIALS OVER THE CHAMBERS IS REQUIRED FOR DUMP TRUCK TRAVEL OR DUMPING.CONTACT STORMTECH AT 1-888-892-2694 WITH ANY QUESTIONS ON INSTALLATION REQUIREMENTS OR WEIGHT LIMITS FORCONSTRUCTION EQUIPMENT.ADVANCED DRAINAGE SYSTEMS, INC. ("ADS") HAS PREPARED THIS DETAIL BASED ON REFERENCED STANDARDS. ADS HAS NOT PERFORMED ANY ENGINEERING OR DESIGN SERVICES FOR THIS PROJECT, NOR HAS ADS INDEPENDENTLY VERIFIED THE INFORMATION SUPPLIED. THE INSTALLATION DETAILS PROVIDED HEREIN ARE
GENERAL RECOMMENDATIONS AND ARE NOT SPECIFIC FOR THIS PROJECT, UNLESS THE PLANS ARE SIGNED AND SEALED BY THE SITE DESIGN ENGINEER. THE SITE DESIGN ENGINEER SHALL REVIEW THESE DETAILS PRIOR TO CONSTRUCTION AND SEALING THE DOCUMENT. IT IS THE SITE DESIGN ENGINEER'S RESPONSIBILITY TO
ENSURE THE DETAILS PROVIDED HEREIN MEETS OR EXCEEDS THE APPLICABLE NATIONAL, STATE, OR LOCAL REQUIREMENTS AND TO ENSURE THAT THE DETAILS PROVIDED HEREIN ARE ACCEPTABLE FOR THIS PROJECT.
REVIEWED:
DRAWN:
PROJECT NO:
DATE:SHEETREV:
4640 TRUEMAN BLVD
HILLIARD, OH 43026
Advanced Drainage Systems, Inc.
StormTech
Chamber System
888-892-2694 | WWW.STORMTECH.COM
®