HomeMy WebLinkAbout2022-05-16 I12 Westgate Business Park Plat 5_Preliminary Plat AGENDA ITEM:
CITY OF WAUKEE, IOWA
CITY COUNCIL MEETING COMMUNICATION
MEETING DATE: May 16, 2022
AGENDA ITEM: Consideration of approval of a resolution approving a preliminary plat
for Westgate Business Park Plat 5
FORMAT: Resolution
SYNOPSIS INCLUDING PRO & CON: The applicant is requesting approval of a preliminary
plat for a 3.08-acre commercial/office development. The property is
located west of SE Alice’s Road and north of SE Olson Drive. The
preliminary plat identifies the creation of one (1) lot for development.
Lot 1 is 3.08-acres in area.
FISCAL IMPACT INCLUDING COST/BENEFIT ANALYSIS:
COMMISSION/BOARD/COMMITTEE COMMENT: The Planning and Zoning
Commission reviewed the request at their meeting on March 29,
2022, recommended approval subject to remaining staff comments:
Approval of a Preliminary Plat for Westgate Business Park Plat 5
Community Development Director, Andy Kass, introduced the request for approval of a
preliminary plat, final plat, and site plan for an office development, as submitted by the applicant,
Access Systems. The property is generally located north of SE Olson Drive and west of SE
Alice’s Road, containing approximately 3.08 acres. The applicant wishes to replat the two
existing lots into one lot and construct a new facility to the east of the existing facility.
Mr. Kass advised that the project involves the construction of a 33,450 square foot office building
for Access Systems and is proposed to be two stories in height. The site plan identifies an area for
expansion however any future expansion will require additional review and approval. A trash
enclosure is located on the northwest side of the site. Access will be provided via SE Olson
Drive, and storm water management will be provided via an underground detention system. All
parking, landscaping, open space, and elevation requirements have been met at this time. Staff
would recommend approval of the preliminary plat, final plat, and site plan subject to any
remaining staff comments and review of the legal documents.
Commissioner Streit questioned how often the underground detention is serviced. Mr.
Kass advised that the requirements are very similar to a ground level pond. The city now
requires maintenance plans on stormwater management and detention so that the
information can more easily be passed along through changing hands.
I12
Commissioner Broderick questioned if the connection to the west is owned by the
applicant. Mr. Kass advised that was correct.
Commissioner Broderick moved to approve the preliminary plat for Westgate Business Park Plat
5 subject to any remaining staff comments and review of the legal documents. Commissioner
Hoifeldt seconded the motion. Ayes: Gerlitz, Hoifeldt, Streit, Inman, Broderick, Koshy, and
Tessau. Nays: none. Motion Carried.
STAFF REVIEW AND COMMENT: Staff’s position is that the proposed preliminary plat
meets the intent and the requirements of the Zoning Ordinance and the
Waukee Subdivision Ordinance.
RECOMMENDATION: Staff recommends approval of the Preliminary Plat for Westgate
Business Park Plat 5.
ATTACHMENTS: I. Resolution
II. Staff Report
III. Preliminary Plat/Site Plan
PREPARED BY: Andy Kass, Community Development Director
REVIEWED BY:
PUBLIC NOTICE INFORMATION –
NAME OF PUBLICATION:
DATE OF PUBLICATION:
THE CITY OF WAUKEE, IOWA
RESOLUTION 2022-
APPROVING THE WESTGATE BUSINESS PARK PLAT 5 PRELIMINARY PLAT
IN THE NAME AND BY THE AUTHORITY OF THE CITY OF WAUKEE, IOWA
WHEREAS, the City of Waukee, Dallas County, State of Iowa, is a duly organized Municipal
Organization; AND,
WHEREAS, the City of Waukee Planning and Zoning Commission reviewed and recommended
approval of a Preliminary Plat for Westgate Business Park Plat 5 on March 29, 2022; AND,
WHEREAS, the Preliminary Plat for Westgate Business Park Plat 5 is in general conformance
with section §303 - Land Subdivision Ordinance of the Waukee Municipal Code.
NOW THEREFORE BE IT RESOLVED by the City Council of the City of Waukee, Iowa on
this the 18th day of April, 2022 that the Preliminary Plat for Westgate Business Park Plat 5 be
approved.
____________________________
Courtney Clarke, Mayor
Attest:
___________________________________
Rebecca D. Schuett, City Clerk
RESULTS OF VOTE: AYE NAY ABSENT ABSTAIN
Anna Bergman Pierce
R. Charles Bottenberg
Chris Crone
Larry R. Lyon
Ben Sinclair
PLANNING AND ZONING COMMISSION STAFF REPORT
PROJECT: Westgate Business Park Plat 5 &
Access Systems – Preliminary Plat, Final
Plat, & Site Plan
PREPARED BY: Andy Kass, AICP, Community
Development Director
REPORT DATE: March 25, 2022
MEETING DATE: March 29, 2022
GENERAL INFORMATION
Applicant: Access Systems
Owner:
Jace Properties, LLC
Owner’s Representative:
Nicole Neal, P.L.A. – Civil Design Advantage
Request: The applicant is requesting approval of a
preliminary plat, final plat, and site plan for an
office development.
Location and Size: Property is generally located north of SE Olson Drive
west of SE Alice’s Road, containing approximately
3.08-acres.
AREA MAP
ABOVE: Aerial of subject property (outlined in RED) in relation to the surrounding area.
March 25, 2022
2 of 3
LAND USES AND ZONING
Location Existing Land Use Comprehensive Plan Current Zoning
Property in
Question
Vacant – Undeveloped Neighborhood Commercial M-1 (Light Industrial
District) / PD-1
(Planned Development
Overlay)
North Vacant – Undeveloped Neighborhood Commercial C-1A (Neighborhood
Commercial District) /
PD-1 (Planned
Development Overlay
District)
South Westgate Business Park Community Commercial M-1 (Light Industrial
District) / PD-1
(Planned Development
Overlay)
East Car-X Neighborhood Commercial C-1 (Community &
Highway Service
Commercial District)
West Westgate Business Park Neighborhood Commercial M-1 (Light Industrial
District) / PD-1
(Planned Development
Overlay)
HISTORY
The subject property is located west of SE Alice’s Road and north of SE Olson Drive. The property was
originally platted and zoned as part of the Westgate Business Park planned development. The applicant wishes
to replat the two existing lots into one lot to construct an office building for Access Systems which has an
existing facility to the west of the property.
PROJECT DESCRIPTION
The project involves the construction of a 33,450 square foot office building for Access Systems. The building
is proposed to be two stories in height with an overall heigh of 39-feet. The site plan identifies a potential
expansion area for the building. Any future expansion will require additional review and approval by the City.
The proposed trash enclosure is located on the northwest side of the site.
ACCESS AND PARKING
Access to the site will be provided via SE Olson Drive. The required amount of parking for the building is 101
parking spaces. The site plan identifies that 113 parking spaces will be provided. A 5-foot sidewalk will be
extended along SE Olson Drive as part of the improvements. In addition, the site plan shows a connection to
the existing 10-foot trail along SE Alice’s Road.
UTILITIES
Utilities already exist on-site to serve the proposed office building. Stormwater management will be provided
via an underground detention system.
March 25, 2022
3 of 3
LANDSCAPING & OPEN SPACE
The required amount of open space for this site is 10% and the landscape plan identifies that 38% open space
will be provided. The required amount of plantings have been shown on the site plan.
ELEVATIONS
Elevations of the available units and clubhouse have been provided by the applicant. Proposed materials include
composite panels, glazing, stone, and fiber cement panels.
LOTS
One lot is shown on the preliminary plat and final plat. Lot 1 is 3.08-acres in area. Lot 1 complies will all
requirements of the M-1/PD-1 zoning district.
STAFF RECOMMENDATION
The site plan is in general conformance with the Zoning Ordinance, Subdivision Ordinance, Site Plan
Ordinance, and Comprehensive Plan. Staff recommends approval of the preliminary plat, final plat, and site
plan subject to remaining staff comments and review of the legal documents.
4121 NW URBANDALE DRIVE, URBANDALE, IOWA 50322
PH: (515) 369-4400
CIVIL DESIGN ADVANTAGE
UTILITY WARNING
EXISTING/ PROPOSED USE
BULK REGULATIONS
ZONING
INDEX OF SHEETS
VICINITY MAP LEGAL DESCRIPTION
DATE OF SURVEY
BENCHMARKS
www.iowaonecall.com
1-800-292-8989
ONE CALL
IOWA
ONE CALL
Know what's
before you dig.
below.Call
Access SystemsAccess Systems
SITE PLAN/PRELIMINARY PLAT FOR:
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WAUKEE, IA
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DEMOLITION NOTES
PROPOSED BUILDING
MAIN FLOOR: 15,997 S.F.
UPPER FLOOR; 17,453 S.F.
TOTAL: 33,450 S.F.
FFE=1048.25
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PROPOSED EXPANSION
MAIN FLOOR: 10,000 S.F.
UPPER FLOOR; 10,000 S.F.
TOTAL: 20,000 S.F.
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GENERAL NOTES
TRAFFIC CONTROL NOTES
PAVEMENT THICKNESS
PROPOSED BUILDING
MAIN FLOOR: 15,997 S.F.
UPPER FLOOR; 17,453 S.F.
TOTAL: 33,450 S.F.
FFE=1048.25
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GRADING NOTES
SOIL QUALITY RESTORATION / TOPSOIL RESPREAD
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ENLARGEMENT #1 ENLARGEMENT #2 ENLARGEMENT #3
ENLARGEMENT #4
DA #1
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DISCHARGE POINT #1
+2800 FEET TO
AN UNNAMED TRIBUTARY OF
SUGAR CREEK
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DISCHARGE POINT SUMMARY
STABILIZATION QUANTITIES
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PROPOSED BUILDING
MAIN FLOOR: 15,997 S.F.
UPPER FLOOR; 17,453 S.F.
TOTAL: 33,450 S.F.
FFE=1048.25
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UTILITY NOTES
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3 SC-310 TECHNICAL SPECIFICATION
2 STORMTECH SC-310 CHAMBER SYSTEM
1 STORMTECH SC-310 CHAMBER SYSTEM
4 STORMTECH SC-310 CHAMBER SYSTEM
ACCEPTABLE FILL MATERIALS: STORMTECH SC-310 CHAMBER SYSTEMS
PLEASE 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 FOR
COMPACTION 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.
NOTES:
1.CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2922 (POLETHYLENE) OR ASTM F2418-16a (POLYPROPYLENE), "STANDARD SPECIFICATION FOR CORRUGATED WALL STORMWATER COLLECTION
CHAMBERS".
2.SC-310 CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION
CHAMBERS".
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 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 2”.
·TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT AS DEFINED IN SECTION 6.2.8 OF ASTM F2922 SHALL BE GREATER THAN OR EQUAL TO 400
LBS/IN/IN. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F / 23° C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR
YELLOW COLORS.
MATERIAL LOCATION DESCRIPTION AASHTO MATERIAL
CLASSIFICATIONS COMPACTION / DENSITY REQUIREMENT
D
FINAL FILL: FILL MATERIAL FOR LAYER 'D' STARTS FROM THE TOP OF THE 'C'
LAYER TO THE BOTTOM OF FLEXIBLE PAVEMENT OR UNPAVED FINISHED
GRADE ABOVE. NOTE THAT PAVEMENT SUBBASE MAY BE PART OF THE 'D'
LAYER.
ANY SOIL/ROCK MATERIALS, NATIVE SOILS, OR PER ENGINEER'S PLANS.
CHECK PLANS FOR PAVEMENT SUBGRADE REQUIREMENTS.N/A
PREPARE PER SITE DESIGN ENGINEER'S PLANS. PAVED
INSTALLATIONS MAY HAVE STRINGENT MATERIAL AND
PREPARATION REQUIREMENTS.
C
INITIAL FILL: FILL MATERIAL FOR LAYER 'C' STARTS FROM THE TOP OF THE
EMBEDMENT STONE ('B' LAYER) TO 18" (450 mm) ABOVE THE TOP OF THE
CHAMBER. NOTE THAT PAVEMENT SUBBASE MAY BE A PART OF THE 'C'
LAYER.
GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35% FINES OR
PROCESSED AGGREGATE.
MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU OF THIS
LAYER.
AASHTO M145¹
A-1, A-2-4, A-3
OR
AASHTO M43¹
3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10
BEGIN COMPACTIONS AFTER 12" (300 mm) OF MATERIAL OVER
THE CHAMBERS IS REACHED. COMPACT ADDITIONAL LAYERS IN
6" (150 mm) MAX LIFTS TO A MIN. 95% PROCTOR DENSITY FOR
WELL GRADED MATERIAL AND 95% RELATIVE DENSITY FOR
PROCESSED AGGREGATE MATERIALS. ROLLER GROSS
VEHICLE WEIGHT NOT TO EXCEED 12,000 lbs (53 kN). DYNAMIC
FORCE NOT TO EXCEED 20,000 lbs (89 kN).
B EMBEDMENT STONE: FILL SURROUNDING THE CHAMBERS FROM THE
FOUNDATION STONE ('A' LAYER) TO THE 'C' LAYER ABOVE.CLEAN, CRUSHED, ANGULAR STONE AASHTO M43¹
3, 357, 4, 467, 5, 56, 57 NO COMPACTION REQUIRED.
A FOUNDATION STONE: FILL BELOW CHAMBERS FROM THE SUBGRADE UP TO
THE FOOT (BOTTOM) OF THE CHAMBER.CLEAN, CRUSHED, ANGULAR STONE AASHTO M43¹
3, 357, 4, 467, 5, 56, 57 PLATE COMPACT OR ROLL TO ACHIEVE A FLAT SURFACE.2,3
D
C
B
A
*TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED
INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY
OCCUR, INCREASE COVER TO 24" (600 mm).
SUBGRADE SOILS
(SEE NOTE 4)
PERIMETER STONE
(SEE NOTE 5)
EXCAVATION WALL
(CAN BE SLOPED OR VERTICAL)
SC-310
END CAP
PAVEMENT LAYER (DESIGNED
BY SITE DESIGN ENGINEER)
16"
(405 mm)
18"
(450 mm) MIN*
8'
(2.4 m)
MAX
6" (150 mm)
MIN
6" (150 mm) MIN STONE DEPTH
12" (300 mm) MIN 12" (300 mm) TYP34" (865 mm)6"
(150 mm) MIN
ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE ALL
AROUND CLEAN, CRUSHED, ANGULAR STONE IN A & B LAYERS
INSPECTION & MAINTENANCE
STEP 1)INSPECT ISOLATOR ROW PLUS FOR SEDIMENT
A.INSPECTION PORTS (IF PRESENT)
A.1.REMOVE/OPEN LID ON NYLOPLAST INLINE DRAIN
A.2.REMOVE AND CLEAN FLEXSTORM FILTER IF INSTALLED
A.3.USING A FLASHLIGHT AND STADIA ROD, MEASURE DEPTH OF SEDIMENT AND RECORD ON MAINTENANCE LOG
A.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 ROWS
B.1.REMOVE COVER FROM STRUCTURE AT UPSTREAM END OF ISOLATOR ROW PLUS
B.2.USING A FLASHLIGHT, INSPECT DOWN THE ISOLATOR ROW PLUS THROUGH OUTLET PIPE
i)MIRRORS ON POLES OR CAMERAS MAY BE USED TO AVOID A CONFINED SPACE ENTRY
ii)FOLLOW OSHA REGULATIONS FOR CONFINED SPACE ENTRY IF ENTERING MANHOLE
B.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 PROCESS
A.A FIXED CULVERT CLEANING NOZZLE WITH REAR FACING SPREAD OF 45" (1.1 m) OR MORE IS PREFERRED
B.APPLY MULTIPLE PASSES OF JETVAC UNTIL BACKFLUSH WATER IS CLEAN
C.VACUUM STRUCTURE SUMP AS REQUIRED
STEP 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.
NOTES
1.INSPECT EVERY 6 MONTHS DURING THE FIRST YEAR OF OPERATION. ADJUST THE INSPECTION INTERVAL BASED ON PREVIOUS
OBSERVATIONS OF SEDIMENT ACCUMULATION AND HIGH WATER ELEVATIONS.
2.CONDUCT JETTING AND VACTORING ANNUALLY OR WHEN INSPECTION SHOWS THAT MAINTENANCE IS NECESSARY.
CATCH BASIN
OR
MANHOLE
SC-310 ISOLATOR ROW PLUS DETAIL
NTS
INSTALL FLEXSTORM INSERTS IN ALL
UPSTREAM STRUCTURES WITH OPEN GRATES
SC-310 CHAMBER
SC-310 END CAP
OPTIONAL INSPECTION PORT
COVER ENTIRE ISOLATOR ROW PLUS WITH ADS
GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE
5' (1.5 m) MIN WIDE
ONE LAYER OF ADSPLUS125 WOVEN GEOTEXTILE BETWEEN
FOUNDATION STONE AND CHAMBERS
4' (1.2 m) MIN WIDE CONTINUOUS FABRIC WITHOUT SEAMS
TWO FOOT SUMP DEPTH. ELEVATIONS
SHOWN ON PLAN SHEETS
UNDERDRAIN DETAIL
NTS
A
A
B B
SECTION A-A
SECTION B-B
DUAL WALL
PERFORATED
HDPE
UNDERDRAIN
ADS GEOSYNTHETICS 601T
NON-WOVEN GEOTEXTILE
STORMTECH END CAP
ADS GEOSYNTHETICS 601T
NON-WOVEN GEOTEXTILE
STORMTECH
CHAMBER
OUTLET MANIFOLD
STORMTECH END CAP
STORMTECH
CHAMBERS
NUMBER AND SIZE OF UNDERDRAINS PER SITE DESIGN ENGINEER
4" (100 mm) TYP FOR SC-310 & SC-160LP SYSTEMS
6" (150 mm) TYP FOR SC-740, DC-780, MC-3500 & MC-4500 SYSTEMS
FOUNDATION STONE
BENEATH CHAMBERS
FOUNDATION STONE
BENEATH CHAMBERS
NOMINAL CHAMBER SPECIFICATIONS
SIZE (W X H X INSTALLED LENGTH)34.0" X 16.0" X 85.4" (864 mm X 406 mm X 2169 mm)
CHAMBER STORAGE 14.7 CUBIC FEET (0.42 m³)
MINIMUM INSTALLED STORAGE*31.0 CUBIC FEET (0.88 m³)
WEIGHT 35.0 lbs.(16.8 kg)
*ASSUMES 6" (152 mm) ABOVE, BELOW, AND BETWEEN CHAMBERS
BUILD ROW IN THIS DIRECTION
SC-310 TECHNICAL SPECIFICATION
NTS
OVERLAP NEXT CHAMBER HERE
(OVER SMALL CORRUGATION)
START END
34.0"
(864 mm)
16.0"
(406 mm)
90.7" (2304 mm) ACTUAL LENGTH 85.4" (2169 mm) INSTALLED LENGTH
A A
B C
9.9"
(251 mm)
15.6"
(396 mm)
PART #STUB A B C
SC310EPE06T / SC310EPE06TPC 6" (150 mm)9.6" (244 mm)5.8" (147 mm)---
SC310EPE06B / SC310EPE06BPC ---0.5" (13 mm)
SC310EPE08T / SC310EPE08TPC 8" (200 mm)11.9" (302 mm)3.5" (89 mm)---
SC310EPE08B / SC310EPE08BPC ---0.6" (15 mm)
SC310EPE10T / SC310EPE10TPC 10" (250 mm)12.7" (323 mm)1.4" (36 mm)---
SC310EPE10B / SC310EPE10BPC ---0.7" (18 mm)
SC310EPE12B 12" (300 mm)13.5" (343 mm)---0.9" (23 mm)
SC310EPE12BR 12" (300 mm)13.5" (343 mm)---0.9" (23 mm)
ALL STUBS, EXCEPT FOR THE SC310EPE12B ARE PLACED AT BOTTOM OF END CAP SUCH THAT THE OUTSIDE DIAMETER OF
THE STUB IS FLUSH WITH THE BOTTOM OF THE END CAP. FOR ADDITIONAL INFORMATION CONTACT STORMTECH AT
1-888-892-2694.
* FOR THE SC310EPE12B THE 12" (300 mm) STUB LIES BELOW THE BOTTOM OF THE END CAP APPROXIMATELY 0.25" (6 mm).
BACKFILL MATERIAL SHOULD BE REMOVED FROM BELOW THE N-12 STUB SO THAT THE FITTING SITS LEVEL.
NOTE: ALL DIMENSIONS ARE NOMINAL
PRE-FAB STUB AT BOTTOM OF END CAP WITH FLAMP END WITH "BR"
PRE-FAB STUBS AT BOTTOM OF END CAP FOR PART NUMBERS ENDING WITH "B"
PRE-FAB STUBS AT TOP OF END CAP FOR PART NUMBERS ENDING WITH "T"
PRE CORED END CAPS END WITH "PC"
NOTES
•MANIFOLD SIZE TO BE DETERMINED BY SITE DESIGN ENGINEER. SEE TECH NOTE #6.32 FOR MANIFOLD SIZING GUIDANCE.
•DUE TO THE ADAPTATION OF THIS CHAMBER SYSTEM TO SPECIFIC SITE AND DESIGN CONSTRAINTS, IT MAY BE NECESSARY TO CUT AND COUPLE ADDITIONAL PIPE TO STANDARD MANIFOLD
COMPONENTS IN THE FIELD.
•THE SITE DESIGN ENGINEER MUST REVIEW ELEVATIONS AND IF NECESSARY ADJUST GRADING TO ENSURE THE CHAMBER COVER REQUIREMENTS ARE MET.
•THIS CHAMBER SYSTEM WAS DESIGNED WITHOUT SITE-SPECIFIC INFORMATION ON SOIL CONDITIONS OR BEARING CAPACITY. THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR
DETERMINING
THE SUITABILITY OF THE SOIL AND PROVIDING THE BEARING CAPACITY OF THE INSITU SOILS. THE BASE STONE DEPTH MAY BE INCREASED OR DECREASED ONCE THIS INFORMATION IS
PROVIDED.
•NOT FOR CONSTRUCTION: THIS LAYOUT IS FOR DIMENSIONAL PURPOSES ONLY TO PROVE CONCEPT & THE REQUIRED STORAGE VOLUME CAN BE ACHIEVED ON SITE.
*INVERT ABOVE BASE OF CHAMBER
ISOLATOR ROW PLUS
(SEE DETAIL/TYP 2 PLACES)
PLACE MINIMUM 12.50' OF ADSPLUS125 WOVEN GEOTEXTILE OVER BEDDING
STONE AND UNDERNEATH CHAMBER FEET FOR SCOUR PROTECTION AT ALL
CHAMBER INLET ROWS
BED LIMITS
97.58'
18
.
7
7
'
86.61'
16
.
1
7
'
MAX FLOWINVERT*DESCRIPTIONITEM ON
LAYOUTPART TYPE
0.90"12" BOTTOM PREFABRICATED END CAP, PART#: SC310EPE12B / TYP OF ALL 12" BOTTOM
CONNECTIONS AND ISOLATOR PLUS ROWSAPREFABRICATED END CAP
0.90"12" BOTTOM PREFABRICATED END CAP, PART#: SC310EPE12BR / TYP OF ALL 12" ISOLATOR ROW
PLUS CONNECTIONSBPREFABRICATED END CAP
0.90"
0.90"
24" x 12" ADS N-12 (24" PIPE)
24" x 12" ADS N-12 (12" PIPE)CMANIFOLD
0.90"
0.90"
24" x 12" ADS N-12 (24" PIPE)
24" x 12" ADS N-12 (12" PIPE)DMANIFOLD
9.0 CFS OUTOCS (DESIGN BY ENGINEER / PROVIDED BY OTHERS)ENYLOPLAST STRUCTURE
6.2 CFS IN(DESIGN BY ENGINEER / PROVIDED BY OTHERS)FNYLOPLAST STRUCTURE
W/WEIR
6.2 CFS IN(DESIGN BY ENGINEER / PROVIDED BY OTHERS)GNYLOPLAST STRUCTURE
W/WEIR
6" ADS N-12 DUAL WALL PERFORATED HDPE UNDERDRAINHUNDERDRAIN
PROPOSED LAYOUT
60 STORMTECH SC-310 CHAMBERS
10 STORMTECH SC-310 END CAPS
6 STONE ABOVE (in)
6 STONE BELOW (in)
40 STONE VOID
2221
INSTALLED SYSTEM VOLUME (CF)
(PERIMETER STONE INCLUDED)
(COVER STONE INCLUDED)
(BASE STONE INCLUDED)
1810 SYSTEM AREA (SF)
232.7 SYSTEM PERIMETER (ft)
VOLUME (CF) ABOVE ELEV = 1041.332101
PROPOSED ELEVATIONS
MAXIMUM ALLOWABLE GRADE (TOP OF PAVEMENT/UNPAVED):1051.01
MINIMUM ALLOWABLE GRADE (UNPAVED WITH TRAFFIC):1045.01
MINIMUM ALLOWABLE GRADE (UNPAVED NO TRAFFIC):1044.51
MINIMUM ALLOWABLE GRADE (TOP OF RIGID CONCRETE PAVEMENT):1044.51
MINIMUM ALLOWABLE GRADE (BASE OF FLEXIBLE PAVEMENT):1044.51
TOP OF STONE:1043.51
TOP OF SC-310 CHAMBER:1043.01
24" x 12" BOTTOM MANIFOLD INVERT (12" PIPE):1041.76
24" x 12" BOTTOM MANIFOLD INVERT (12" PIPE):1041.76
12" ISOLATOR ROW PLUS INVERT:1041.76
12" ISOLATOR ROW PLUS INVERT:1041.76
12" BOTTOM CONNECTION INVERT:1041.76
BOTTOM OF SC-310 CHAMBER:1041.68
UNDERDRAIN INVERT:1041.33
BOTTOM OF STONE:1041.18
24" x 12" BOTTOM MANIFOLD INVERT (24" PIPE):1041.76
24" x 12" BOTTOM MANIFOLD INVERT (24" PIPE):1041.76
A
HG
B
C
F
D
E
INSPECTION PORT
(TYP 2 PLACES)
12" (300 mm) HDPE ACCESS PIPE REQUIRED
USE FACTORY PRE-FABRICATED END CAP
PART #: SC310EPE12BR
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1 NYLOPLAST DRAIN BASIN WITH WEIR (ST-1, ST-4, & ST-7)
(5) ADAPTER ANGLES
VARIABLE 0° - 360°
ACCORDING TO PLANS
(7) INTEGRATED DUCTILE IRON
FRAME & SOLID COVER
TO MATCH BASIN O.D.
INLET PIPE
(1) OUTLET WEIR
(1) 24" - 30"
DRAIN BASIN BODY
24" - 30" FRAME &
SOLID COVER
(2)
(3)
HIGH-FLOW/SECONDARY
OUTLET
FIRST-FLUSH
OUTLET
INLET
PIPE
(4)
(6) VARIOUS TYPES OF INLET & OUTLET ADAPTERS
AVAILABLE: 4" - 30" FOR CORRUGATED HDPE
(ADS N-12/HANCOR DUAL WALL, ADS/HANCOR
SINGLE WALL), N-12 HP, PVC SEWER (EX: SDR 35),
PVC DWV (EX: SCH 40), PVC C900/C905,
CORRUGATED & RIBBED PVC
1 - WEIR AVAILABLE FOR ALL 24" - 30" STRUCTURE OPTIONS (CUSTOM BASIN,
ROAD & HIGHWAY, & CURB INLET).
2 - DRAIN BASIN TO BE CUSTOM MANUFACTURED ACCORDING TO PLAN DETAILS.
RISERS ARE NEEDED FOR BASINS OVER 84" DUE TO SHIPPING RESTRICTIONS
SEE DRAWING NO. 7001-110-065.
3 - HEIGHT OF WEIR TO BE DETERMINED BY ENGINEER. WEIR HEIGHT CANNOT
EXCEED 84" DUE TO MANUFACTURING AND SHIPPING RESTRICTIONS.
4 - WEIR MANUFACTURED TO MINIMIZE LOSS OF OUTLET PIPE OPEN AREA.
5 - ADAPTERS CAN BE MOUNTED ON ANY ANGLE 0° TO 360°. TO DETERMINE
MINIMUM ANGLE BETWEEN ADAPTERS SEE DRAWING NO. 7001-110-012.
6 - DRAINAGE CONNECTION STUB JOINT TIGHTNESS SHALL CONFORM TO
ASTM D3212 FOR CORRUGATED HDPE (ADS N-12/HANCOR DUAL WALL),
N-12 HP, & PVC SEWER (4" - 24").
7 - FRAMES, GRATES, COVERS, HOODS, & BASE PLATES SHALL BE DUCTILE IRON
PER ASTM A536 GRADE 70-50-05.
SIDE SECTION & TOP VIEW:
ENLARGED TO SHOW DETAIL
THE BACKFILL MATERIAL SHALL BE CRUSHED STONE OR OTHER
GRANULAR MATERIAL MEETING THE REQUIREMENTS OF CLASS I,
CLASS II, OR CLASS III MATERIAL AS DEFINED IN ASTM D2321.
BEDDING & BACKFILL FOR SURFACE DRAINAGE INLETS SHALL BE
PLACED & COMPACTED UNIFORMLY IN ACCORDANCE WITH ASTM D2321.
WEIR PLATE (TYP.)
ST-1
SUMP/BOTTOM WEIR=1038.96
TOP WEIR=1044.85
16.5" ORIFICE OPENING IN
WEIR PLATE, FL=1040.96
ST-4
SUMP/BOTTOM WEIR=1039.76
TOP WEIR=1042.76
WEIR BLOCKING SOUTH PIPE
ST-7
SUMP/BOTTOM WEIR=1039.76
TOP WEIR=1042.76
WEIR BLOCKING NORTH PIPE
2 ROOF DRAIN CONNECTION
PROPOSED BUILDING
MAIN FLOOR: 15,997 S.F.
UPPER FLOOR; 17,453 S.F.
TOTAL: 33,450 S.F.
FFE=1048.25
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LANDSCAPE NOTES
OPEN SPACE REQUIREMENTS
PARKING LANDSCAPE REQUIREMENTS
RESPREAD
SOIL QUALITY RESTORATION / TOPSOIL