HomeMy WebLinkAboutDrainage Summary
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Medical Drive Shopps
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Carmel, Indiana
Design Summary
Docket No. 06080032 DP/ADLS
September 6, 2006
Prepared By:
VS ENGINEERING, INC.
4275 North High School Road
vsei@vsengineering.com
Phone: (317) 293-3542
Indianapolis, Indiana 46254
www.vsengineering.com
Fax: (317) 293-4737
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Existine: Conditions
The project site is located at 154 Medical Drive, Carmel, IN 46032 and is owned by
Mukesh Patel of Carmel. The property is zoned B-8 and is approximately 1.3 acres in
size. The lot was the former location of a childcare facility that burned down in 1998.
The parking lot for the childcare facility is still located on the site, and access is achieved
by two curb cuts located along Medical Drive on the east and west ends of the property.
With the exception of the parking lot, the remainder of the property is grass with a group
of trees and brush. The high point is located on the north side of the property and slopes
towards the south. There is a 12' grade change from the high point to the low point of the
property. Currently stormwater enters an enclosed storm sewer system at several
locations within the property. The neighboring properties are graded in such a way that
stormwater flows onto Mr. Patel's property and then into the city's storm sewer system.
It should also be noted that a City of Carmel 12" storm sewer runs through the north
portion of the property and is not located in an existing easement. This particular line
services a neighboring property, with no stormwater from the project site entering the
line.
Proposed Conditions
Site owner Mukesh Patel proposes that a commercial development be constructed
on the project site. The building will have one, or a combination ofthe following uses:
retail sales/general service, general office, and/or professional office. The maximum
amount of tenants possible will be eight; with a minimum of 1200 square feet per unit.
The proposed development was to have setbacks of 10' on the west, north, and
east sides, and a 30' setback on the south side of the property, which fronts Medical Dr.
However, due to the irregular shape ofthe property, Mr. Patel asked for a variance to
reduce the 30' setback to 15' so the building could be placed efficiently within the
property. This variance was approved 3-0 on June 26,2006 under Docket No. 06050016
V, Shops on Medical Drive (See Appendix A).
The proposed building will be constructed using painted concrete masonry units,
brick veneer, and an exterior insulation finish system. The design will incorporate wall
mounted and pole mounted lights. The signs for each unit will be located above the
awnings and will be a maximum of 30 square feet. Each sign will be internally lighted,
wall mounted individual channel letters. The exact dimensions will be addressed in an
ADLS amendment when future tenants are determined. As stated in the commitments for
the above mentioned variance, there will be a decorative wrought iron fence placed along
the south border of the property (Medical Drive). All required landscaping will be placed
on site as required by the City of Carmel Urban Forestry Department.
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Due to the irregular shape of the property and the large change in elevation
within the property, a retaining wall will be built along the west edge, north edge, and
also a small portion of the east edge of the property. The wall will be constructed using
modular blocks manufactured by Keystone Retaining Systems. Examples of the retaining
system can be found in the Appendix I.
The stormwater will be divided into two parts, detained runoff, and non-detained
. runoff. The detained runoff consists of all areas that are within the perimeter of the
retaining wall and parking area. This flow will be routed through an enclosed storm
sewer system, through an oil/water separator and into an underground detention facility.
The underground detention facility will have an orifice that will be sized so that the
stormwater is released in a controlled manner. The areas that will not be detained consist
of areas that are located outside the perimeter of the retaining wall and the parking lot.
This flow will be routed through grassy swales and directly into the City of Carmel's
storm sewer system. The main purpose of these swales is to serve as a vegetative filter
strip and also to re-direct flow from the neighboring properties away from the proposed
retaining wall and building.
The sidewalk from the Goddard School will be extended in the front of the project
site. It should be noted that the sidewalk will not be built in the City ofCarme!'s right-
of-way, therefore a 5.5' sidewalk easement will be dedicated to the City of Carmel.
Appendices
A: Copy of Variance
B. Copy of ADLS Application
C. Copy of DP Application
D. Legal Description
E. Floodway Map
F. Notice ofIntent Form
G. Stormwater Management Permit Application
H. Soils Map
I. Keystone Wall Specification and Sample
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Appendix A
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o Angelina Conn
Planning & Zoning Administrator
Department of Community Services
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CI Y OF
CARMEL
DEPARTMENT OF COMMUNITY SERVICES
Division of Planning & Zoning
LET T E R of DEe I S ION
June 27, 2006
Mukesh.Patel
301 East Carm<<;:l Drive
Carmel, IN 46032
Re: Shops on Medical Drive - 06050016 V
Dear Mr. Patel:
At the meeting held Monday, June 26, 2006, the Carmel Advisory Board of Zoning Appeals took the following action
regarding the Development Standards Variance application filed by you for the property located at 126 Medical Drive.
APPROVED: Docket No. 06050016 V Development Standards Variance for landscape bufferyard requirement.
Please be advised that per Section 30.05.05: Time Limit of the Zoning Ordinance, the aforementioned Development
Standards Variance approval is valid for one (1) year. By that time, either continuous construction of the
improvements must be underway, or a written request for a one-time, six-month extension of the approval must have
been received and approval granted by this Department. The expiration date of the approval is June 26, 2007.
If! can be of any further assistance, please do not hesitate to contact me at 317/571-2417.
Sincerely,
cc:
Jim Wheeler, Coots, Henke & Wheeler
Adam DeHart, Keeler-Webb
Scott Brewer, Carmel City Forester
Jim Blanchard, Building Commissioner
Sarah Lillard, Building and Code Services
ONE CIVIC SQUARE
CARMEL, INDIANA 46032
317-571-2417
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Appendix B
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Date
DOCKET NO.
APPLICATION for ADLS
ARCHITECTURAL DESIGN. LIGHTING. and SIGNAGE
FEE: $802.00 (Plus $107.00 per acre when NOT accompanied by a Development Plan)
Name of Project: Medical Drive Shopps
Address: 15 If Medical Drive, Cannel, IN 46032
Type of Project: Commercial Development
Applicant:
Mukesh Patel
Phone No. 317-843-8392
Contact Person: Sanj ay Patel
Phone No. 317-293-3542
Fax No. 317-293-4737
Email: sbpatel@vsenqineerinq.com
Address: 4275 N. High School Road, Indianapolis, IN 46/.'14
Legal Description: To be typewritten on a separate sheet
Area (in acres) 1.348
Zoning B-8/Business
Owner of Real Estate:
Mukesh Patel
Carmel:
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Annexation: Y or N
Clay Township:
Other Approvals Needed: Variance Docket #06050016V Ch 19.06 (l!Qproved 6/26/06)
PARKING
No. of Spaces Provided:
45
No. Spaces Required:
39
DESIGN INFORMATION
Type of Building: Commerical
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No. of Buildings:
Square Footage: 9,600 Height:26'-10" (M:lx) No.ofStories----1
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Exterior Materials: Brick Vl:rEer Colors: B.n:glrDy, l:::ei.g9, p:ll.e o::h:i.e
EXtel:ior" Jhsl. Fi.n:iS1
Maximum No. of Ten ants: 8 Type of Uses: Office General. Professional Office
Retail Sales/General Service
Water by: City of Cannel Sewer by: City of Cannel
Z:shared\forms\PC application\adlsapp.doc
1/4/2006
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LIGHTING
Type of Fixture: Wall Mounted Height of Fixture: 161 - Wall Mounted
Pole Mounted 1 4 '-6" Pole Mounted
No. of Fixtures: 6 Additional Lighting: N/A
* Plans to be submitted showing Foot-candle spreads at property lines, per the ordinance.
SIGNAGE
No. of Signs: 10
Internally lighted wall mounted
Type of Signs: signs w/ind. channel letters
Location(s): Above awnings for each unit with end unit having an extra sign
on side of building
Dimensions of each sign: 3 '-0" H x 10' -0" L (Max.)
Square Footage of each sign:
30 S.F. (Max.)
3' (Max.)
Total Height of each sign:
LANDSCAPING
* Plans to be submitted showing plant types, sizes, and locations
* * * * *" >l: * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
I the undersigned, to the best of my knowledge and belief, submit the above
information as true and correct.
Signature of ~
Applicant: tf71 ()
Title: OWner
Mukesh Patel Date: August 14, 2006
(Print)
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State of Indiana,
SS:
County of Marion
Before me the undersigned, a Notary Public for Hendricks County,
State of Indiana, personally appeared Mukesh Patel and acknowledged the
execution of the foregoing instrument this 14 th day of August , 2006
~ ~ ~ c ~oQ- Notary Publ~cxpires: 2-12-2009
~ c. Wright
Revised: 01/03/2006
2
S: \FORMS\PC Applications - current\ADLSAMEN .APP 2006. dC,lc
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Appendix C
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DEVELOPMENT IP'LAN OR (DIP' AmeJIl1<rllmeIDln A1P'IP'LlICA TlION
Fee: $802.00 plus $107.00 per acre OR ($802.00 plus $107.00 per acre)
DATE:
DOCKET NO.
x
Preliminary
Public Hearing Required
Final
Received By/Date
Amended or Changed
Checked By
Name of
Project: Medical Drive Shopps
Project
Address: 15~ Medical Drive, Carmel, IN 46032
Legal
Description: (To be typewritten on separate sheet and attached)
Name of
Applicant: Mukesh Patel
Address: 301 East Cannel Dr., Carmel. IN 46032
Contact Person: Sanj ay Patel
Telephone: 317-293-3542
Fax No. 317-293-4737
Email: sbpatel@vsengineering.com
Name of
Landowner: Mukesh Patel
Telephone: 317-843-8392
Address: 301 East Carmel Dr.. Carmel, IN 46032
Plot Size:
1.348 acres
Zoning Classification: B-8/Business
Present Use
of Property: Vacant lot,former site of child care facility
which bumed down in 1998
Proposed Use
of Property: Office General, Professional Office,
Retail Sales/General Service
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NOTE:
This application must be filed in duplicate and accompanied by: a) Two (2) copies of
the development plan which the applicant will be responsible for distribution among
TAC members; b) All necessary supporting materials.
The undersigned agrees that any construction, reconstruction, enlargement, relocation or
alteration of structures, or any change in the use of land or structures requested by this
application will comply with and conform to all applicable laws ofthe State of Indiana
and the zoning ordinance of Carmel, Indiana, adopted under the authority of Acts of
1979, Public Law 178, Sec. 1, et seq., General Assembly ofthe State oflndiana, and all
Acts amendatory thereto.
Signed:
tPl ;) IU-0
Owner
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Agenf'7
Sanjay B. Patel
(Typed)
Mukesh Patel
(Typed)
STATE OF INDIANA
SS:
Couri.ty of Marion
Before me the undersigned, a Notary Public for Hendricks
(county of residence)
County, State of Indiana, personally appeared Mukesh Patel
(name of person)
and acknoyv1edged the execution of the foregoing instrument this
14th day-of August , 20~.
c;?i~{!~
(N ary Public Signature)
Linda C. Wright
(Printed or Typed)
My Commission Expires: 2-12-2009
z:\shared\fonns\PC applications\devplan.app Rev. 01103/2006
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Appendix D
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154 South Medical Drive
Carmel, Indiana 46032
Legal Description
Part of the South Half of the Section 31, Township 18 North, Range 4 East in Clay
Township, Hamilton County, Indiana, described as follows:
Commencing at the Southwest corner of the South Half of Section 31, Township 18
North, Range 4 East; thence North 89 degrees 50 minutes 15 seconds East (assumed
bearing) on the South line of said South Half733.00 feet; thence North 00 degrees 24
minutes 05 seconds East 660.00 feet to the Southerly right of way line of Carmel Medical
Drive South and the place of beginning of the real estate herein described; thence North
76 degrees 56 minutes 20 seconds East to said right of way line 258.71 feet; thence North
13 degrees 03 minutes 40 seconds West 234.54 feet; thence North 89 degrees 35 minutes
55 seconds West 197.00 feet to a point on a line which bears North 00 degrees 24
niinutes 05 seconds East from the place of beginning; thence South 00 degrees 24
minutes 05 seconds West on said line 288.32 feet to said place of beginning.
Subject to: Easements, restrictions, mortgages, and taxes of record
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Appendix E
SHOSHONE DR
APPROXIMATE SCALE
INDIAN TAL 500 0 500 FEET
ZONE X - - t--t I
EXECUTIVE DR
HUNTERS
0 LN NATIONAL ROOD INSURANCE PROGRAM
0 CARMEL DR
FIRM
ROOD INSURANCE RATE MAP
HAMILTON COUNTY,
~ INDIANA
~ STATION ~ AND INCORPORATED AREAS
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\\o~t<;: (SEE MAP INDEX FOR PANELS NOT PRINTED)
LocD.~\ NUMBER PANa SUFFIX
lflllllBl om
,..... 0228
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REVERE PL
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MEDICAL DR
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JEFFERSON
City of Carmel
(Extraterritorial Jurisdiction)
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Notice b u..r. ~ MAP NUMBER 8hown belaw .~outc1 be used
WhlIn pIlIclng /'nIP order&; the COMMUNITY NUMBER shawn
above 5houId be 1.IACl on Itl8UbInCe IppIlcationa for the aubl8Ct
community.
MAP NUMBER
18057C0228F
EFFEC11VE DATE:
FEBRUARY 19, 2003
Federal Emergency Management Agency
This is an ofticial copy of a portion of the abow referenced flood map. ~
was extracted USing F-MIT On-Une. This map does not reflect changes
or amendments which may haw been made subsequent to the date on the
title block. For the latest product information about National Flood Insurance
Program flood maps check the FEMA Flood Map Store at WWN.msc.fema.gov
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Appendix F
NOTICE OF INTENT (NOI) STORM WATERRUNOFF ASSOCIATED WITH
CONSTRUCTION ACTIVITY
State Form 47487 (R6/9-04)
Approved by State Board of Accounts 2004
Indiana Department of Environmental Management
Drinking Water Branch
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Submission of this Notice of Intent letter constitutes notice that the project site owner is applying for coverage under
the National Pollutant Discharge Elimination System (NPDES) General Permit Rule for Storm Water Discharges
Associated with Construction Activity. Permitted project site owners are required to comply with all terms and
conditions of the General Permit Rule 327 IAC 15-5 (Rule 5).
Check the type of Submittal: 0 Initial 0 Amendment 0 Renewal
Project Name and Location:
Project Permit # Project Name: Medical Drive Shopps County: Hamilton
Brief Description of Project Location: 154 Medical Drive app. 2 lots E of Rangeline Rd. in Carmel
Latitude Deg. ~ / Min. ~/ Sec. 32 and Quarter SW Section 31
Longitude Deg. ~ / Min. ~ / Sec. ~ Township 18N Range 4E
(Permit Number below required for Renewals
and Admendments Only - Not required for
Initial Submittal)
Does 0 all or 0 part of this project lie within the jurisdictional boundaries of a Municipal Separate Storm
Sewer System (MS4) 0 Yes 0 No If yes, please name the MS4(s):
City of Carmel, Indiana
Project Sit~ Owner and Project Contact Information:
Company Name (If Applicable): N/A
Project Site Owner's Name (An Individual): Mr. Mukesh Patel
Address: 301 East Carmel Dr.
Title/Position: Owner
City: Carmel State: IN
Phone: (317}.843-8392 E-Mail Address (If Available):
Ownership Status (check one): GovernmentalAgency: 0 Federal 0 State 0 Local
Non-Governmental: 0 Public 0 Private 0 Other (Explain):
Contact Person: Sanjay B. Patel, P .E. Affiliation with Project Site Owner: Design Consultant
Company Name: VS Engineering, INC.
Address (if different from above): 4275 N. High School Road
City: Indianapolis
Phone: (317) 293-3542
Zip: 46032
State: IN Zip 46254
E-Mail Address (If Available): sbpatel@vsengineering.co
Project Description:
o Residential-Single Family 0 Residential-Multi-Family 0 Commercial 0 Industrial 0 Other
Discharge Information:
Name of Receiving Water: Carmel Creek
(If applicable, name of municipal operator of storm sewer. Please note that even if a retention pond is present on
the property, the name of the nearest possible receiving water is required).
Project Acreage:
Total Acreage: 1.348 Acres Proposed Acreage to be Disturbed: 1.348 Acres
TotalImpervious Surface Area (Estimated for Completed Project): 33105.6 Square Feet
(as defmed in 327 lAC 15-5-4(16) including structures, roads, parking lots, and other similar improvements)
Timetable:
Start Date: 12/1/2006 and Estimated End Date for all Land Disturbing Activity: 12/1/2007
NOTE: Within forty-eight hours of the initiation of construction activity, the project site owner must notify the
appropriate plan reviewing agency of the actual project start date.
(Continued on Reverse Side)
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Construction Plan Certification:
By signing this Notice of Intent letter, I certify the following:
A. The storm water quality measures included in the construction plan comply with the requirements of 327 lAC 15-
5-6.5,327 lAC 15-5-7, and 327 lAC 15-5-7.5;
B. the storm water pollution prevention plan complies with all applicable federal, state, and local storm water
requirements;
C. the measures required by 327 lAC 15-5-7 and 327 lAC 15-5-7.5 will be implemented in accordance with the
storm water pollution prevention plan;
D. if the projected land disturbance is one (1) acre or more, the applicable Soil and Water Conservation District or
other entity designated by the Department, has been sent a copy of the construction plan for review;
E. storm water quality measures beyond those specified in the storm water pollution prevention plan will be
implemented during the life of the permit if necessary to comply with 327 IAC 15-5-7; and
F. implementation of storm water quality measures will be inspected by trained individuals.
In addition to this form, I have enclosed the FoUowm2:
~ Verification by the reviewing agency of acceptance of the construction plan.
~ Proof of publication in a newspaper of general circulation in the affected area that notified the public that a
construction activity is to commence, including all required elements contained in 327 lAC 15-5-5 (9).
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~ $100 check or money order payable to the Indiana Department of Environmental Management. If the project lies
solely within the permitted jurisdiction of an MS4 and is regulated by the MS4 under 327 lAC 15-13 - a fee is
not required with submittal of this Notice of Intent
A permit issued under 327 lAC 15-5 is granted by the commissioner for a period of five (5) years from the date
coverage commences. Once the five (5) year permit term duration is reached, a general permit issued under this rule
will be considered expired, and, as necessary for construction activity continuation, a new Notice of Intent letter would
need to be submitted ninety (90) days prior to the termination of coverage.
Project Site Owner Responsibility Statement:
By signing this Notice of Intent letter, I certify under penalty of law that this document and all attachments were
prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the
system, or those persons directly responsible for gathering the information, the information submitted is, to the best of
my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting
false information, including the possibility of fme and imprisonment for knowing violations.
Printed Name of Project Owner Mr. Mukesh P,I
Signature of Project Owner m [} f~ Date: 0/ r &, r 0 ~
. This Notice of Intent must be signed by an individual meeting the signatory requirements in 327 lAC 15-4-3(g)
and submitted in accordance with 327 lAC 15-5-6.
Mail this form to: Indiana Department of Environmental Management
Urban Wet Weather Section
Cashiers Office Attn: OWQ Rule 5
100 North Senate Avenue
Indianapolis, IN 46204
327 lAC 15-5-6 (a) also requires a copy of the completed Notice of Intent letter be submitted
to the local Soil and Water Conservation District or other entity designated by the
Department, where the land disturbing activity is to occur.
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Questions regarding the development of the Construction Plan and/or field implementation of 327 lAC 15-5 may be directed to
your local Soil and Water Conservation District office or the Department of Natural Resources at 317 -233- 3870. Questions
regarding the Notice ofIntent may be directed to the Rule 5 contact person at 317/233-1864 or 800/451-6027 ext 31864.
State Form 47487 (R6 / 9-04)
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Appendix G
City of Carmel
STORMWATER MANAGEMENT PERMiT APPLICATiON
Permit #:
Submission of this application constitutes notice that the project owner is applying for coverage under the Cannel City Code ~6-180 through ~6-209 for
r'e~ water discharges associated with construction activity. Permitted project site owners are required to comply with all terms and conditions of the
~llllel City Code.
oject Name:
Medical Drive Sho s
Brief Description of Project Location:
154 Medical Dr. Cannel
titude:
390 57' 32" N
uarter: ~ection:
SW 31
IN-
. 2 Lots East of eline Road
Longitude:
860 07' 26" W
Township: Range:
18N
4E
ompany Name (If Applicable):
N/A
~ect Site O~er's Name (An Individual):
Mr. Mukesh P t 1
ddress:
301 East Cannel Drive
"ty: .
Cannel
TitlelPosition:
State:
Zip:
IN
46032
N/A
o Governmental Agency
o Public
E-mail Address (If Available):
NA
rm Private 0 Other (Explain)
Phone:
317-843-8392
ership Status (check one):
Fax:
WPPP Contact Person:
Mr. Sanjay Patel, P.E.
Affiliation to Project Site Owner:
Desi Consultant
ddress (Ifdifferentfrom above):
4275 N. Hi School Road
Dity: . ,
Indianapolis
Phone:
n 317-293-3542
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Company Name (If Applicable): '
VS ENGINEERING, INC.
IN
Zip:
46254
State:
Fax:
317-293-4737
E-mail Address (If Available):
shnatellilvspnai nPPri ng (Y)I11
eroiect Descrintion:
U 0 Residential-Single Family 0 Residential-Multi Family IXI Commercial
Name of Receiving Water:
D Cannel Creek
. (If a detention pond is present on the property, the name' of the nearest possible receiving water receiving discharge must be provided)
Project Acreage:
D Total Acreage: 1.348 Proposed Acreage to be Disturbed: 1 .348
Total Impervious Surface Area (in square feet, estimated for entire project): 33, 1 05.6
o Industrial
o Other (Explain)
r-roject Duration:
I.J Estimated Start Date: 12/1/2006
Estimated End Date for all Land Disturbing Activity: 12/1/2007
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(Continued on Reverse Side)
rrY signing this application, I certify the following:
I..h.. The storm water quality meaSUl-es included in the Stonn Water Pollution Prevention Plan (SWPPP) comply with the requirements of
. ~6~180 through ~6=209 oftfie Cannel City Code and the City of Carmel Stormwater Technical Standards Manual;
~.'. The Stoml Water Pollution Prevention Pla.n (SWPPP) complies with all applicable federal, state, and local stormwater requirements;
The measures required by the Stormwater Pollution Prevention Plan (SWPPP) shall be implemented;
Stormwater quality measures beyond those specified in the Stormwater Pollution Prevention Plan (SWPPP) will be implemented
during the life of the permit if necessary to comply with the Carmel City Code; and
IE. Implementation of stormwater quality measures will be inspected by trained individuals;
~ Pursuant to Carmel City Code ~ 6-205, the City reserves the right to implement the stormwater quality measures outlined in the
Stormwater Pollution Prevention Plan (SWPPP) or provide maintenance thereto, at my expense, if not performed.
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A permit issued under ~6-180 through ~6-209 of the Carmel City Code, and granted by the City of Carmel, is valid for a period of five (5)
I(ears from the date coverage commences. Once the five (5) year permit term duration is reached, a general permit issued under this
~rdinance will be considered expired. A new permit application shall be submitted ninety (90) days prior to the termination of coverage,
so that a new permit may be issued for continuation of construction activity.
I~y signing this application, I certify under penalty of law that this document and all attachments were prepared under my direction or
l.iupervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the
j)lformation, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are
l.Jignificant penalties;or :ub,~tt~g false information, including the possibility of fine and imprisonment for knowing violations.
'/ ~l{/ Mukesh Patel 1-00'-0(,
Dignature ofProj~t Owner Printed Name Date
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pproval of this application will constitute acceptance of the construction plans by the City of Carmel.
10 obtain a Rule 5 permit, the following should be sent to the Indiana Department of Environmental Management and a copy sent to the
Wity of Carmel Engineering Department:
CiI Rule 5 Notice of Intent (NOI) .
~." Copy of approved Stormwater Management Permit AP, plication, signed and dated by the City of Carmel Department of Engineering
Proof of publication
$100 permit fee payable to the Indiana Department of Environmental Management
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Pennit Approved: Engineering Department
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Date
OOR OFFICE USE ONLY:
('[WPPP approved by the City of Carmel:
Uonstruction Plans approved by TAC:
Permit fee received:
On outstanding fees received:
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Section
MODULAR CONCRETE RETAINING WALL
PART 1:
GENERAL
1.01 Description
A. Work shall consist of furnishing and construction of a KEYSTONE Retaining Wall
System or equal in accordance with these specifications and in reasonably close
conformity with the lines, grades, design, and dimensions shown on the plans.
B. Work includes preparing foundation soil, furnishing and installing leveling pad, unit
drainage fill and backfill to the lines and grades shown on the construction drawings.
C. Work includes furnishing and installing geogrid soil reinforcement of the type, size,
location, and lengths designated on the construction drawings.
1.02 Related Sections
A. Section 02100 - Site Preparation
B. Section 02200 - Earthwork
1.03 Reference Documents
A. American Society for Testing and Materials (ASTM)
1.
2.
3.
4.
5.
6.
7.
8.
9.
ASTM C-1372
ASTM 0-422
ASTM 0-698
ASTM 0-4318
ASTM 0-4595
ASTM 0-5262
ASTM 0-3034
ASTM 0-1248
ASTM 0-4475
Specification for Segmental Retaining Wall Units
Particle Size Analysis
Laboratory Compaction Characteristics of Soil -Standard Effort
Liquid Limit, Plastic Limit and Plasticity Index of Soils
Tensile Properties of Geotextiles - Wide Width Strip
Unconfined Tension Creep Behavior of Geosynthetics
Polyvinyl Chloride Pipe (PVC)
Corrugated Plastic Pipe
Horizontal Shear Strength of Pultruded Reinforced Plastic
Rods
B. Geosynthetic Research Institute (GRI)
1 .
2.
GRI-GG4
GRI-GG5
Determination of Long Term Design Strength of Geogrids
Determination of Geogrid (soil) Pullout
C. National Concrete Masonry Association (NCMA)
1. NCMA SRWU-1 Test Method for Determining Connection Strength of SRW
2. NCMA SRWU-2 Test Method for Determining Shear Strength of SRW
1.04 Submittals/Certification
A. Contractor shall submit a Manufacturer's certification, prior to start of work, that the
retaining wall system components meet the requirements of this specification and the
structure design.
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B. Contractor shall submit construction drawings and design calculations for the retaining
wall system prepared and stamped by a Professional Engineer registered in the state
of the project. The engineering designs, techniques, and material evaluations shall
be in accordance with the Manufacturer's Design Manual, NCMA Design Guidelines
For Segmental Retaining Walls, or the AASHTO Standard Specifications for Highway
Bridges, Section 5.8 (whichever is applicable to designer).
C. Contractor shall submit a test report documenting strength of specific modular
concrete unit and geogrid reinforcement connection. The maximum design tensile
load of the geogrid shall be equal to the laboratory tested ultimate strength of
geogrid / facing unit connection at a maximum normal force limited by the "Hinge
Height" of the structure divided by a safety factor of 1.5. The connection strength
evaluation shall be performed in accordance with NCMA test method SRWU-1.
1.05 Quality Assurance
A. Contractor shall submit certification, prior to start of work, that the retaining wall
system (modular concrete units and specific geogrid):
1) Has been successfully utilized on a minimum of five (5) similar projects, i.e.,
height, soil fill types, erection tolerances, etc.; and
2) Has been successfully installed on a minimum of 1 million (1,000,000) square
feet of retaining walls.
B. Contractor shall submit a list of five (5) previously constructed projects of similar size
and magnitude by the wall installer where the specific retaining wall system has been
constructed successfully. Contact names and telephone numbers shall be listed for
each project.
C. Contractor shall provide evidence that the design engineer has a minimum of five
years of documental experience in the design for reinforced soil structures. The
design engineer shall provide proof of current professional liability insurance with an
aggregate coverage limit of not less than $2,000,000.
D. Owner shall/may provide soil testing and quality assurance inspection during
earthwork and wall construction operations. Contractor shall provide any quality
control testing or inspection not provided by the Owner. Owner's quality assurance
program does not relieve the contractor of responsibility for quality control and wall
performance.
1.06 Delivery, Storage and Handling
A.
Contractor shall check all materials upon delivery to assure that the proper type,
grade, color, and certification have been received.
B.
Contractor shall protect all materials from damage due to jobsite conditions and in
accordance with manufacturer's recommendations. Damaged materials shall not be
incorporated into the work.
PART 2:
PRODUCTS
2.01 Definitions
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2.02
A.
Modular Unit - a concrete retaining wall element machine made from Portland cement,
water, and aggregates.
B.
Structural Geogrid - a structural element formed by a regular network of integrally
connected tensile elements with apertures of sufficient size to allow interlocking with
surrounding soil, rock, or earth and function primarily as reinforcement.
C.
Unit Drainage Fill - drainage aggregate, which is placed within and immediately
behind the modular concrete units.
D.
Reinforced Backfill - compacted soil, which is placed within the reinforced soil volume
as outlined on the plans.
Modular Concrete Retaining Wall Units
A. Modular concrete units shall conform to the following architectural requirements:
1. Face color - concrete gray. The Owner may specify standard manufacturers'
color.
2. Face finish - sculptured rock face in angular tri-planer configuration. Other
face finishes will not be allowed without written approval of Owner.
3. Bond configuration - running with bonds nominally located at midpoint
vertically adjacent units, in both straight and curved alignments.
4. Exposed surfaces of units shall be free of chips, cracks or other imperfections
when viewed from a distance of 10 feet under diffused lighting.
B.
Modular concrete materials shall conform to the requirements of ASTM C1372 -
Standard Specifications for Segmental Retaining Wall Units.
C.
Modular concrete units shall conform to the following structural and geometric
requirements measured in accordance with appropriate references:
1. Compressive strength: O!: 3000 psi minimum (21 MPa);
2. Absorption: s 8 % (6% in northern states) for standard weight aggregates;
3. Dimensional tolerances: :!: 1/8" (3 mm) from nominal unit dimensions not
including rough split face, :!:1/16" (1.5 mm) unit height - top and bottom
planes;
4. Unit size: 8" (203 mm) (H) x 18" (457 mm)(W) x 12" (304 mm)(D) minimum;
5. Unit weight: 75 Ibs/unit (35 kg/unit) minimum for standard weight aggregates;
6. Inter-unit shear strength: 600 plf (8 kN/m) minimum at 2 psi (13 MPa) normal
pressure;
7. Geogrid/unit peak connection strength: 600-plf (8 kN/m) minimum at 2-psi (13
MPa) normal force.
D.
Modular concrete units shall conform to the following constructability requirements:
1. Vertical setback = 1/8":1: (3 mm) per course (near vertical) or 1" (25 mm)+ per
course per the design;
2. Alignment and grid positioning mechanism - fiberglass pins, two per unit
minimum;
3. Maximum horizontal gap between erected units shall be - 1/2 inch (13 mm).
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2.03 Shear Connectors
A. Shear connectors shall be 1/2-inch (12 mm) diameter thermoset isopthalic polyester
resin-pultruded fiberglass reinforcement rods or equivalent to provide connection
between vertically and horizontally adjacent units. Strength of shear connectors
between vertical adjacent units shall be applicable over a design temperature of 10
degrees F to + 100 degrees F (-10 to 40 degrees C).
B. Shear connectors shall be capable of holding the geogrid in the proper design
position during grid pre-tensioning and backfilling.
2.04 Base Leveling Pad Material
A. Material shall consist of a compacted crushed stone base or non-reinforced concrete
as shown on the construction drawings.
2.05 Unit Drainage Fill
A. Unit drainage fill shall consist of clean 1" (25 mm) minus crushed stone or crushed
gravel meeting the following gradation tested in accordance with ASTM 0-422:
Sieve Size
1 inch (25 mm)
3/4-inch (19 mm)
No. 4
No. 50
Percent Passinq
100
75-100
0- 10
0-5
B. One cubic foot (0.028 m3), minimum, of drainage fill shall be used for each square
foot (0.093 m2) of wall face. Orainage fill shall be placed within cores of, between,
and behind units to meet this requirement.
2.06 Reinforced Backfill
A. Reinforced backfill shall be free of debris and meet the following gradation tested in
accordance with ASTM 0-422:
Sieve Size
2-inch (50 mm)
3/4-inch (19 mm)
No. 40
No. 200
Percent Passinq
100
100-75
0-60
0-35
Plasticity Index (PI) <15 and Liquid Limit <40 per ASTM 0-4318.
B. The maximum aggregate size shall be limited to 3/4 inch (19 mm) unless field tests
have been performed to evaluate potential strength reductions to the geogrid design
due to damage during construction.
C. Material can be site-excavated soils where the above requirements can be met.
Unsuitable soils for backfill (high plastic clays or organic soils) shall not be used in the
backfill or in the reinforced soil mass.
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2.07
D. Contractor shall submit reinforced fill sample and laboratory test results to the
Architect/Engineer for approval prior to the use of any proposed reinforced fill
material.
Geogrid Soil Reinforcement
A. Geosynthetic reinforcement shall consist of geogrids manufactured specifically for soil
reinforcement applications and shall be manufactured from high tenacity polyester
yarn or high-density polyethylene. Polyester geogrid shall be knitted from high
tenacity polyester filament yarn with a molecular weight exceeding 25,000 g/m and a
carboxyl end group values less than 30. Polyester geogrid shall be coated with an
impregnated PVC coating that resists peeling, cracking, and stripping.
B. Ta, Long Term Allowable Tensile Design Load, of the geogrid material shall be
determined as follows:
Ta = Tult / (RFcr*RFd*RFid*FS)
Ta shall be evaluated based on a 75-year design life.
1. Tult, Short Term Ultimate Tensile Strength
Tult is based on the minimum average roll values (MARV)
2.
RFcr, Reduction Factor for Long Term Tension Creep
RFcr shall be determined from 1 O,OOO-hour creep testing performed in
accordance with ASTM D5262. Reduction value = 1.60 minimum.
3.
RFd, Reduction Factor for Durability
RFd shall be determined from polymer specific durability testing covering the
range of expected soil environments. RFd = 1.10 minimum.
4.
RFid, Reduction Factor for Installation Damage
RFid shall be determined from product specific construction damage testing
performed in accordance with GRI-GG4. Test results shall be provided for
each product to be used with project specific or more severe soil type. RFid =
1.05 minimum.
5. FS, Overall Design Factor of Safety
FS shall be 1.5 unless otherwise noted for the maximum allowable working
stress calculation.
C.
The maximum design tensile load of the geogrid shall not exceed the laboratory
tested ultimate strength of the geogrid/facing unit connection as limited by the "Hinge
Height" divided by a factor of safety of 1.5. The connection strength testing and
computation procedures shall be in accordance with NCMA SRWU-1 Test Method for
Determining Connection Strength of SRW.
D.
Soil Interaction Coefficient, Ci
Ci values shall be determined per GRI:GG5 at a maximum 0.75-inch (19 mm)
displacement.
E.
Manufacturing Quality Control
The geogrid manufacturer shall have a manufacturing quality control program that
includes QC testing by an independent laboratory.
The QC testing shall include:
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Tensile Strength Testing
Melt Flow Index (HOPE)
Molecular Weight (Polyester)
2.08 Drainage Pipe
A.
If required, the drainage pipe shall be perforated or slotted PVC pipe manufactured in
accordance with ASTM 0-3034 or corrugated HOPE pipe manufactured in
accordance with ASTM 0-1248.
PART 3:
EXECUTION
3.01 Excavation
A. Contractor shall excavate to the lines and grades shown on the construction
drawings. Owner's representative shall inspect the excavation and approve prior to
placement of leveling material or fill soils. Proof roll foundation area as directed to
determine if remedial work is required.
B. Over-excavation and replacement of unsuitable foundation soils and replacement
with approved compacted fill will be compensated as agreed upon with the Owner.
3.02 Base Leveling Pad
A.
Leveling pad material shall be placed to the lines and grades shown on the
construction drawings, to a minimum thickness of 6 inches (150 mm) and extend
laterally a minimum of 6" (150 mm) in front and behind the modular wall unit.
B.
Soil leveling pad materials shall be compacted to a minimum of 95 % Standard
Proctor density per ASTM 0-698
C. Leveling pad shall be prepared to insure full contact to the base surface of the
concrete units.
3.03 Modular Unit Installation
A. First course of units shall be placed on the leveling pad at the appropriate line and
grade. Alignment and level shall be checked in all directions and insure that all units
are in full contact with the base and properly seated.
B. Place the front of units side-by-side. Do not leave gaps between adjacent units.
Layout of corners and curves shall be in accordance with manufacturer's
recommendations.
C. Install shear/connecting devices per manufacturer's recommendations.
O. Place and compact drainage fill within and behind wall units. Place and compact
backfill soil behind drainage fill. Follow wall erection and drainage fill closely with
structure backfill.
E. Maximum stacked vertical height of wall units, prior to unit drainage fill and backfill
placement and compaction, shall not exceed two courses.
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3.04
3.05
Structural Geogrid Installation
A. Geogrid shall be oriented with the highest strength axis perpendicular to the wall
alignment.
B. Geogrid reinforcement shall be placed at the strengths, lengths, and elevations
shown on the construction design drawings or as directed by the Engineer.
C. The geogrid shall be laid horizontally on compacted backfill and attached to the
modular wall units. Place the next course of modular concrete units over the geogrid.
The geogrid shall be pulled taut, and anchored prior to backfill placement on the
geogrid.
O. Geogrid reinforcements shall be continuous throughout their embedment lengths and
placed side-by-side to provide 100% coverage at each level. Spliced connections
between shorter pieces of geogrid or gaps between adjacent pieces of geogrid are
not permitted.
Reinforced Backfill Placement
A. Reinforced backfill shall be placed, spread, and compacted in such a manner that
minimizes the development of slack in the geogrid and installation damage.
B. Reinforced backfill shall be placed and compacted in lifts not to exceed 6 inches (150
mm) where hand compaction is used, or 8 - 10 inches ( 200 to 250 mm) where heavy
compaction equipment is used. Lift thickness shall be decreased to achieve the
required density as required.
C. Reinforced backfill shall be compacted to 95% of the maximum density as determined
by ASTM 0698. The moisture content of the backfill material prior to and during
compaction shall be uniformly distributed throughout each layer and shall be dry of
optimum, + 0%, - 3%.
O. Only lightweight hand-operated equipment shall be allowed within 3 feet (1 m) from
the tail of the modular concrete unit.
E. Tracked construction equipment shall not be operated directly upon the geogrid
reinforcement. A minimum fill thickness of 6 inches (150 mm) is required prior to
operation of tracked vehicles over the geogrid. Tracked vehicle turning should be
kept to a minimum to prevent tracks from displacing the fill and damaging the geogrid.
F. Rubber tired equipment may pass over geogrid reinforcement at slow speeds, less
than 10 MPH (15 KPH). Sudden braking and sharp turning shall be avoided.
G. At the end of each day's operation, the Contractor shall slope the last lift of reinforced
backfill away from the wall units to direct runoff away from wall face. The Contractor
shall not allow surface runoff from adjacent areas to enter the wall construction site.
3.06 Cap Installation
A. Cap units shall be glued to underlying units with an all-weather adhesive
recommended by the manufacturer.
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3.07 As-built Construction Tolerances
A. Vertical alignment: :t 1.5" (40 mm) over any 10' (3 m) distance.
S. Wall Batter: within 2 degrees of design batter.
C. Horizontal alignment: :t 1.5" (40 mm) over any 10' (1 m) distance.
Corners, bends & curves: :t 1 ft (300 mm) to theoretical location.
D. Maximum horizontal gap between erected units shall be s 1/2 inch (13 mm).
3.08 Field Quality Control
A.
Quality Assurance - The Owner shall/may engage inspection and testing services,
including independent laboratories, to provide quality assurance and testing services
during construction. This does not relieve the Contractor from securing the necessary
construction quality control testing.
B.
Quality assurance should include foundation soil inspection. Verification of
geotechnical design parameters, and verification that the contractor's quality control
testing is adequate as a minimum. Quality assurance shall also include observation
of construction for general compliance with design drawings and project
specifications. (Quality assurance is usually best performed by the site geotechnical
engineer.)
C.
Quality Control - The Contractor shall engage inspection and testing services to
perform the minimum quality control testing described in the retaining wall design
plans and specifications. Only qualified and experienced technicians and engineers
shall perform testing and inspection services.
D.
Quality control testing shall include soil and backfill testing to verify soil types and
compaction and verification that the retaining wall is being constructed in accordance
with the design plans and project specifications.
PART 4:
MEASUREMENT AND PAYMENT
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