HomeMy WebLinkAboutCorrespondence: Response to Comments 6-26-12
Angie Conn
June 26, 2012
Planning Administrator
2011123.14
City of Carmel Planning & Zoning Division
Dept. of Community Services
1 Civic Square, 3rd Flr.
Carmel, IN 46032
Phone: 317-571-2417
RE: Proposed Fifth Third Bank
205 E. Carmel Dr.
Ms. Conn,
On behalf of Fifth Third Bank, GPD submits this letter to outline how we will address the
outstanding comments. Currently, there are comments from the Department of Engineering
(Gary Duncan), Department of Engineering Technical Advisory Committee for Development
Drainage Designs (William Hall, CrossRoad Engineers), City of Carmel Water-Wastewater
Utilities (Steve Cook), and Stormwater Pollution Prevention (John Thomas). Fifth Third, CB
Richard Ellis and GPD have reviewed the comments and will address the comments as follows:
Department of Engineering (Gary Duncan)
1.Previous Comment 12. Please provide a basic traffic summary that compares AM and
PM peak traffic entering and exiting the site for the current use and proposed use. It
did not appear that a traffic study was included with this submittal.
2.Previous Comment 18. Please revise the landscaping plan so that there is no planting
material within the proposed access easement along the south property line. The
Department repeats this comment.
3.This was not included
in the plans.
Page 1 of 7
Proposed Fifth Third Bank June 7, 2012
Department of Engineering (TAC Engineering Review by Crossroad Engineers, PC)
1.Please review and revise the granular backfill hatching limits indicated on the Storm
Sewer Profiles, Sheet C-401, to be in accordance with City of Carmel Standard
Drawing 10-28. It appears that the required depth of granular backfill is not satisfied.
This detail should also be added to Sheet C-502 to replace detail #9 that is currently
included on the sheet.
2.Per the spot elevations included on Sheet C-121 along the east property line of the
site, it appears that the proposed grading will result in a large ponding area along the
property line (from spot elevation 383.70 south to approximate spot elevation 838.64)
and swale slopes that are less than acceptable standards. Please revise the grading
along the east property line of the parcel to achieve no ponding water along the
property line, and acceptable swale design.
3.It appears that the allowable release rates for the proposed 10-year storm are
incorrect on the construction plans, and within the drainage report. Within the City of
Carmel Redevelopment Scenario, it is required to detain the post-developed 100-year
rate to the pre-developed 10-year rate, and the post-developed 10-year rate to the
pre-developed 2-year rate. However, the indicated allowable release rate for the 10-
year scenario is noted as the pre-developed 10-year rate (6.24 cfs). The allowable
release rate for the post-developed storm should be the pre-developed 2-year rate
(3.75 cfs). Please review and revise as necessary.
4.Per Section 104.02 of the Manual, the MLAG elevation shall have a minimum
0-year elevation. It is
indicated that the on-site 100-year elevation resulting from a blocked outlet is 839.90;
however, the MLAG elevation is indicated as 839.92. Please review and revise as
necessary.
Page 2 of 7
Proposed Fifth Third Bank June 7, 2012
City of Carmel Water-Wastewater Utilities (Steve Cook)
For Water Service and Sewer Later Installation: Locate the middle of the Lot and
ece of PVC pipe is to be
ind the
sidewalk. Should service lines be outside these boundaries, it must be noted on print.
We require 2 sets of paper copy as-builts as well as 2 digital copies drawn with
AutoCAD Version 2004 or earlier. These as-built drawings must include streets, lots,
water mains, and the measurements between all fittings, (valves, laterals, fittings,
service lines, (ALL LABELED). Water will not be turned on or approved until this
requirement is fulfilled.
All valves, hydrants, fittings, etc are REQUIRED to be captured using survey grade
equipment as GPS points and submitted with as-builts. More information can be
found in the City of Carmel Specs.
ractor shall be billed for all bacteriological lab services.
Page 3 of 7
Proposed Fifth Third Bank June 7, 2012
All Ductile Iron water mains shall be bedded in sand, from the bottom of the trench to
Fire Hydrants: Shall be Mueller or American Darling (Safety Yellow, M.A.B. #0433291,
Sherwin Williams #F75YP2) (Carmel Clay Spec. hydrants shall be open right and will
have a safety blue stripe around hydrant bonnet from the factory). The hydrant
pumper nozzle shall be of one-
The nozzle shall be an integral part of the fire hydrant and must be furnished by the
manufacturer or authorized distributor designated by the manufacturer. Mueller
model 290220 for casting and 290221 for cap. Storz adapters will not be accepted.
above all water mains. Tracer
wire must be installed with all water main laid in Carmel.
The developer shall verify the elevations of existing utilities and design plans
accordingly. Existing infrastructure shall not be moved to accommodate new
developments.
Posi-caps or the equivalent are now required on all water valve installations.
You will need to call for an onsite meet with the inspector prior to water main
installation.
You will also need to have an approved stamped set of prints before starting any
construction.
There must be a detail sheet that includes a restraint joint chart.
Page 4 of 7
Proposed Fifth Third Bank June 7, 2012
Utility inspectors have the authority to make changes in the field if conditions are
warranted.
Stormwater Pollution Prevention (John Thomas)
Construction Plans
C131
1. The site drains to City Storm Sewer and then to
Carmel Creek. Please revise.
2. The underground detention and porous
asphalt areas have the potential to discharge stormwater into groundwater.
Please revise.
3. Please add concrete washout, portable
toilets, contractor wash water, dust, and exposed soils to potential pollutants list.
C133
4.Please clearly callout the location of all Post-Construction facilities.
A.Show footprint of porous asphalt.
B.Use consistent symbol to show location of structures containing sumps.
C.Show location of Inspection Port and Maintenance access for the underground
detention.
D.Show location of Water Quality Unit.
Page 5 of 7
Proposed Fifth Third Bank June 7, 2012
5.Please show the general stabilization method of all previous lawn areas.
A.Surface Storm Water conveyances should be stabilized with erosion control
blanket/sod at a minimum. Please show stabilization method.
6.The porous asphalt and underground detention are located in poorly drained soil.
Will subsurface drainage be installed to provide drainage for either system? If so,
Double Walled Pipe if
utilized.
C503
7.The provided porous asphalt cross-section shows it on top of an underground
detention system. Please provide a site specific cross section.
8.Will there be any type of separation between typical asphalt and the porous
asphalt such as a flush/ribbon curb? If so, please show on plans and provide a
cross-section.
General
9.Does a stable drive need to be provided for Vacuum Trucks to access the
Underground Storage maintenance manhole?
Operation and Maintenance Manual
10.Please provide a sample inspection(s) that should be used by the BMP owner to
inspect the various BMPs.
Page 6 of 7
Proposed Fifth Third Bank June 7, 2012
11.-
manual.
12.Please include a site map, clearly showing the location of all sumps, vegetated
swales, underground detention maintenance/inspection ports, and water quality
unit location.
13.Please provide cross-sections of each BMP where applicable. For instance, the
porous asphalt cross-section needs to be included.
14.Please make a note that annual inspection reports may be submitted to:
Engineering Department, Attn: Storm Water Administrator, One Civic Square,
Carmel, IN 46032.
If you have any questions, concerns, or require any additional information, please do not
hesitate to contact me directly at 614-859-1611 or email at alane@gpdgroup.com.
Respectfully,
Aaron R. Lane, E.I.
Project Coordinator
Enclosure(s):
CC: Fifth Third Bank via Expesite
CB Richard Ellis via Expesite
Page 7 of 7