HomeMy WebLinkAboutFES-2104003 Drainage Report (1)CIVIL ENGINEERS
LAND DEVELOPMENT CONSULTANTS
DRAINAGE CONSULTANTS
CERTIFIED FLOODPLAIN MANAGER
14020 Mississinewa Drive Carmel, Indiana 46033 Phone: 317.324.8695 www.Fritz-Eng.com
F:\2021\2104003 - Hazel Dell Bldg Expansion\02 Civil\Engr\Drainage\FES-2104003 Drainage Report.docx
STORMWATER TECHNICAL
INFORMATION REPORT
146TH & HAZEL DELL, PARCEL 2, BUILDING 2, PHASE B
Project Location:
14555B HAZEL DELL PARKWAY
CARMEL, IN 46033
Prepared For:
STUDIO 3 DESIGN
8604 ALLISONVILLE ROAD, STE 330
INDIANAPOLIS, IN 46250
Date:
May 14, 2021
Last Revised:
5/14/2021
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TABLE OF CONTENTS
TABLE OF CONTENTS .................................................................................................. 2
PROJECT DESCRIPTION .............................................................................................. 3
FEMA MAP OVERVIEW ................................................................................................. 3
WATERSHED DESCRIPTION ........................................................................................ 3
SOILS OVERVIEW ......................................................................................................... 3
TABLE 1 – PROJECT SOILS 3
ZONING INFORMATION ................................................................................................ 3
DEVELOPMENT STANDARDS ...................................................................................... 4
EXISTING CONDITIONS ................................................................................................ 4
TABLE 2 – MASTER PLAN DETENTION BASIN CONTRIBUTING WATERSHED
ANALYSIS 5
PROPOSED CONDITIONS ............................................................................................. 5
STORMWATER DETENTION ......................................................................................... 6
STORMWATER QUALITY .............................................................................................. 6
STORMWATER PIPE DESIGN ....................................................................................... 6
TABLE 3 – MASTER PLAN PIPE CAPACITY PARAMETERS 7
SUMMARY ...................................................................................................................... 7
REFERENCES ................................................................................................................ 7
APPENDICES ................................................................................................................. 8
APPENDIX A – LOCATION MAP
APPENDIX B – FEMA MAP
APPENDIX C – SOILS DATA & MAP
APPENDIX D – EXISTING DRAINAGE ANALYSIS
APPENDIX E – PROPOSED DRAINAGE ANALYSIS
APPENDIX F – PREVIOUS PROJECT DRAINAGE CALCULATIONS
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PROJECT DESCRIPTION
Studio 3 Design is proposing to construct the planned expansion of the existing medical
office building located within the Riverview Medical Complex at the southeast corner of
146th Street & Hazel Dell Parkway in Carmel, Indiana. The addition known as Building 2,
Phase B building is anticipated to have between 4-6 tenants, is comprised of 10,000 gross
square feet and will be single story. Access to the site will be provided from existing
interior driveways.
For reference, the project site is located at approximately latitude 39°59’57''N and
longitude 86º04’08”W.
FEMA MAP OVERVIEW
The project site is located within the FEMA Community Panel Map #18057C0227G dated
November 19, 2014 Review of the map indicates the site is located within the Flood
Designation ‘Zone X’ (unshaded). Therefore, the site is not subject to Flood Control
Ordinance requirements. The FEMA Map is included in Appendix B.
WATERSHED DESCRIPTION
The project site is located within the ‘White River-Vestal Ditch/Michener Ditch ‘ watershed
as provided on the IndianaMap GIS system. The 14-digit Hydrologic Unit Codes (HUC)
for this watershed Is 05120201090020.
SOILS OVERVIEW
The project site contains the soils listed in the following Table. The Hydrologic Soil Group
(HSG) for each soil is also provided. The appropriate limits of each soil type are depicted
in the Soils Map provided in Appendix C.
TABLE 1 – PROJECT SOILS
ZONING INFORMATION
The site is within the corporate limits of the City of Carmel. The underlying Zoning
Classification is PUD. The proposed use is permitted in the PUD Zoning District.
Soil Symbol Soil Name, Description HSG
YmsB2 Miami Silt Loam – Urban land complex B
YcIA Crosby silty loam C
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DEVELOPMENT STANDARDS
The project site is located within the City of Carmel, Hamilton County, Indiana. Therefore,
the proposed drainage improvements are subject to the standards of design and
construction of the City of Carmel. Runoff and detention sizing will be modeled using
HydroCAD version 10.00-24 utilizing the Type II rainfall distribution and rainfall depths
from Table 201-3 of the Camel Stormwater Technical Standards Manual (Manual).
EXISTING CONDITIONS
The proposed development site is currently partially developed within the overall
Riverview Medical Park. Most of RMP is fully developed and this Phase 2 of Building 2
was previously planned for and approved through Carmel ADLS Docket #0702007.
When RMP was designed a master planned storm sewer system was designed and
constructed to accommodate the commercial development including the existing
commercial buildings onsite. As such, the primary focus of the existing conditions are how
the existing conditions drain to that master planned system. The existing site has
essentially two distinct drainage patterns as described below.
BASIN 8 - sheet drains approximately the majority of the site to the south/southwest
into an inlet installed as part of the master planned development. This inlet is
labeled as Basin 8 in the masterplan calculations and the previous design plans
denotes this as Str 605. Runoff is then piped south into the existing inlet that
was master planned for this area, also part of Basin 8 in the master plan
calculations and “E8” in the subsequent commercial development which
primarily drains to this structure.
BASIN 10 – includes the existing building adjacent to this project site and the north
half of the south drive.
BASIN 16 - sheet drains the northern portion of the site, from the front of the
building/sidewalk to an existing area inlet in the parking lot to the north. This
area was accounted for in the Building 1 design and noted as inlet 603. It is
also part of the master planned detention analysis within basin E16.
For clarity, a map of the existing drainage sheds and infrastructure is illustrated in
Appendix D.
The stormwater detention basin for this site was mater planned in 2003 as part of the
Riverview Medical Park Drainage Calculations prepared by The Schneider Corporation.
This report is located within Appendix F of this report. The subject project site is within
“DEV” watershed, which included 10.92 acres with a CN=94.3 and contributing to “Lake”
which is located approximately 750 feet east of the subject site on the south side of 146th
Street.
The subject site is the last undeveloped area contributing to the “DEV”. As such, the
following table calculates the entire developed contributing watershed to “Lake” To confirm
the overall CN=94.3 has not been exceeded.
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TABLE 2 – MASTER PLAN DETENTION BASIN CONTRIBUTING WATERSHED
ANALYSIS
CN Calculations for Masterplanned Detention Pond Watersheds
Hydrologic Soil Groups
Soils
Group
CN
Value
CN Description Percentage of
Area
B 61 Open Space ‐ Good Condition (>75% grass cover) 90.0%
C 74 Open Space ‐ Good Condition (>75% grass cover) 10.0%
Watershed Descriptions Area
(acres)
Percentages of Area Types
Area * Percentage *
CN
Impervious Pervious B
Soils
C
Soils
Imp.
(98)
B
(61)
C
(74) DEV Watershed Parcel 1 Fully Developed
(inc. det pond) 5.74 78.0% 22.0% 19.8% 2.2% 438.77 69.33 9.34
Parcel 2 Fully Developed
(inc. prop. Bldg) 3.07 62.0% 38.0% 34.2% 3.8% 186.53 64.05 8.63
Parcel 3 Fully Developed 1.90 59.0% 41.0% 36.9% 4.1% 109.86 42.77 5.76
100.0% 90.0% 10.0% 0.00 0.00 0.00
100.0% 90.0% 10.0% 0.00 0.00 0.00
100.0% 90.0% 10.0% 0.00 0.00 0.00
100.0% 90.0% 10.0% 0.00 0.00 0.00
Total= 10.7 Total = 735.16 176.14 23.74 Design Calc'd Wtd. CN 94.3 87.3
The above demonstrates that the overall developed contributing watershed including the
proposed project are within the downstream existing detention basin parameters. No
further onsite stormwater detention is required. A map of the overall detention watershed
areas is provided in Appendix E.
PROPOSED CONDITIONS
Studio 3 Design is proposing to construct the planned expansion of the existing medical
office building located within the Riverview Medical Complex at the southeast corner of
146th Street & Hazel Dell Parkway in Carmel, Indiana. The addition known as Building 2,
Phase B building is anticipated to have between 4-6 tenants, is comprised of 10,000 gross
square feet and will be single story. Access to the site will be provided from existing
interior driveways.
Since the Riverview Medical Park design included specific parameters for this
development, the following details how the proposed improvements fit within the
previously approved drainage systems.
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The majority of the site will drain to the southwest corner of the site as it does in existing
conditions. This includes the roof drainage, the western area adjacent to the building
addition. The proposed parking area south of the addition will sheet drain to the south
access drive and flow east to the existing curb inlet noted as Str #1430 on the survey and
was designed to convey runoff from the master plan Basin 10 to the detention pond. The
storm sewer analysis below demonstrates that the proposed improvements fit within the
actual constructed storm sewer network capacity without any further stormwater
infrastructure required.
Calculations for onsite stormwater infrastructure including pipe sizing for the 10-year
Rational Method peak runoffs have been provided.
The proposed improvements are consistent with the City of Carmel stormwater
management standards. Runoff calculations for the proposed conditions are computed in
Appendix using the minimum 5-minute Time of Concentration. A map of the proposed
basins is provided in Appendix E.
STORMWATER DETENTION
As noted above, the project site is located within a master planned stormwater
management system. The proposed improvements are within the master planned design
parameters and no additional onsite stormwater detention is necessary. Reference
Appendix F for the master plan drainage calculations.
STORMWATER QUALITY
The proposed site was included in the master drainage analysis for the downstream
drainage system including Stormwater Quality. Two BMPs are required for the system
per 701-05 of the Carmel Stormwater Manual. The master drainage analysis provides the
calculations for demonstrating the existing detention pond satisfies one BMP while the
installed AquaSwirl’s downstream of Buildings 1 and Building 2, Phase 1 satisfied the
other. Together with the Stormwater Detention confirmation above and the Stormwater
Pipe Design below, it is demonstrated that the two existing BMPs have been sized for this
proposed development.
Together, the two BMPs will provide considerably greater than the 80% TSS required.
STORMWATER PIPE DESIGN
The proposed site was included in the master drainage analysis for the downstream
drainage system including stormwater piping from the site, master plan Basin 8, 10 and
16 incorporate portions of the subject building addition site. These basins translate to the
master planned storm sewer pipe calculations as Basins 608, 610 and 616. Due to the
existing downstream pipe network, the master plan analysis included three storm sewer
pipe design parameters.
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TABLE 3 – MASTER PLAN PIPE CAPACITY PARAMETERS
Master Plan
Structure Reference
Max.
Allowable
Flow, cfs
Structure #608 10.50
Structure #610 13.93
Structure #616 9.46
Calculations for onsite stormwater infrastructure including pipe sizing for the 10-year
Rational Method peak runoffs have been provided in Appendix E. In order to demonstrate
that the above noted parameters are met, the proposed onsite storm runoff has been
analyzed and compared to actual surveyed storm sewer pipe capacities. This analysis
shows that no adverse impacts from the proposed improvements are anticipated.
A map of the proposed basins is provided in Appendix E along with the pipe analysis.
SUMMARY
Studio 3 Design is proposing to construct the planned expansion of the existing medical
office building located within the Riverview Medical Complex at the southeast corner of
146th Street & Hazel Dell Parkway in Carmel, Indiana. The addition known as Building 2,
Phase B building is anticipated to have between 4-6 tenants, is comprised of 10,000 gross
square feet and will be single story. The Riverview Medical Park drainage analysis
provided specific parameters for the development of the outlots. This report demonstrates
that the proposed project improvements meet all previously approved parameters and no
further stormwater detention or water quality measures are necessary.
As a result of the onsite drainage analysis, the proposed improvements are not anticipated
to have adverse impacts on the surrounding or downstream drainage systems.
REFERENCES
1. Hamilton County Soils Map (Web Soil Survey)
2. FEMA Flood Insurance Rate Maps, FEMA Website
3. Indiana Drainage Handbook
4. Carmel Stormwater Technical Standards
5. Hamilton County Surveyor’s Office Technical Standards & Details
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APPENDICES
APPENDIX A – LOCATION MAP
APPENDIX B – FEMA MAP
APPENDIX C – SOILS DATA & MAP
APPENDIX D – EXISTING DRAINAGE ANALYSIS
APPENDIX E – PROPOSED DRAINAGE ANALYSIS
APPENDIX F – PREVIOUS PROJECT DRAINAGE CALCULATIONS
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APPENDIX A – LOCATION MAP
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SITE VICINITY & ZONING MAP
SITE LOCATION
0.30 Acres
Zoned: PUD
N
S1
PUD PUD
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APPENDIX B – FEMA MAP
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National Flood Hazard Layer FIRMette
0 500 1,000 1,500 2,000250
Feet
Ü
SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
SPECIAL FLOOD
HAZARD AREAS
Without Base Flood Elevation (BFE)
Zone A, V, A99
With BFE or DepthZone AE, AO, AH, VE, AR
Regulatory Floodway
0.2% Annual Chance Flood Hazard, Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mileZone X
Future Conditions 1% Annual
Chance Flood HazardZone X
Area with Reduced Flood Risk due to
Levee. See Notes.Zone X
Area with Flood Risk due to LeveeZone D
NO SCREEN Area of Minimal Flood Hazard Zone X
Area of Undetermined Flood HazardZone D
Channel, Culvert, or Storm Sewer
Levee, Dike, or Floodwall
Cross Sections with 1% Annual Chance
17.5 Water Surface Elevation
Coastal Transect
Coastal Transect Baseline
Profile Baseline
Hydrographic Feature
Base Flood Elevation Line (BFE)
Effective LOMRs
Limit of Study
Jurisdiction Boundary
Digital Data Available
No Digital Data Available
Unmapped
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the
authoritative NFHL web services provided by FEMA. This map
was exported on 5/10/2021 at 3:13 PM and does not
reflect changes or amendments subsequent to this date and
time. The NFHL and effective information may change or
become superseded by new data over time.
This map image is void if the one or more of the following map
elements do not appear: basemap imagery, flood zone labels,
legend, scale bar, map creation date, community identifiers,
FIRM panel number, and FIRM effective date. Map images for
unmapped and unmodernized areas cannot be used for
regulatory purposes.
Legend
OTHER AREAS OF
FLOOD HAZARD
OTHER AREAS
GENERAL
STRUCTURES
OTHER
FEATURES
MAP PANELS
8
B 20.2
The pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
1:6,000
86°4'25"W 40°0'13"N
86°3'48"W 39°59'46"N
Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020
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APPENDIX C – SOILS DATA & MAP
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Soil Map—Hamilton County, Indiana
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
5/10/2021
Page 1 of 3442804644280554428064442807344280824428091442810044281094428118442804644280554428064442807344280824428091442810044281094428118579432579441579450579459579468579477579486
579432 579441 579450 579459 579468 579477 579486
39° 59' 58'' N 86° 4' 10'' W39° 59' 58'' N86° 4' 7'' W39° 59' 55'' N
86° 4' 10'' W39° 59' 55'' N
86° 4' 7'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 16N WGS84
0 15 30 60 90
Feet
0 5 10 20 30
Meters
Map Scale: 1:371 if printed on A portrait (8.5" x 11") sheet.
Soil Map may not be valid at this scale.
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MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:15,800.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Hamilton County, Indiana
Survey Area Data: Version 21, Jun 4, 2020
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Aug 1, 2018—Sep
30, 2018
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Soil Map—Hamilton County, Indiana
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
5/10/2021
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Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
YbvA Brookston silty clay loam-
Urban land complex, 0 to 2
percent slopes
0.1 12.4%
YclA Crosby silt loam, fine-loamy
subsoil-Urban land complex,
0 to 2 percent slopes
0.0 2.8%
YmsB2 Miami silt loam-Urban land
complex, 2 to 6 percent
slopes, eroded
0.6 84.7%
Totals for Area of Interest 0.7 100.0%
Soil Map—Hamilton County, Indiana
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
5/10/2021
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APPENDIX D – EXISTING DRAINAGE ANALYSIS
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G G G G G G G G G G GTTT
T T
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20.0'3.0'20.0'3.0'40.0'3.0'20.0'3.0'20.0'30.0'2.0'20.0'2.0'20.0'120.0'70.0'CT T
BASIN 16
1.57 AC.
BASIN 10
0.59 AC.
BASIN 8
0.43 AC.
LAKE
EXH-1
EXISTING BASIN MAP
N
00 80'160'
SCALE: 1" = 80'SHEET NAME / NO.
14020 Mississinewa Drive
Carmel, Indiana 46033
P: 317.324.8695 F: 317.324.8695
www.Fritz-Eng.com
Fritz Engineering
Services, LLC
5/14/2021
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APPENDIX E – PROPOSED DRAINAGE ANALYSIS
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////////////////////////////
///////////////////////////////////PROPOSED BUILDING
1-STORY
10,100 GSF
120.0'3.0'
24.7'64.0'24.7'
20.0'
20.0'40.0'20.0'4.0'26.0'1.6'20.0'1.6'20.0'3.0'20.0'
existing building
1-story
existing building
1-story ooooooooooooooooooooooooXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXooo
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G G G G G G G G G G GTTT
T T
T T
20.0'3.0'20.0'3.0'40.0'3.0'20.0'3.0'20.0'30.0'2.0'20.0'2.0'20.0'120.0'70.0'CT T
BASIN 10
0.61 AC.
BASIN 8
0.33 AC.
BASIN 16
1.57 AC.
EXH-2EXH-2
PROPOSED BASIN MAP
14020 Mississinewa Drive
Carmel, Indiana 46033
P: 317.324.8695 F: 317.324.8695
www.Fritz-Eng.com
Fritz Engineering
Services, LLC
SHEET NAME / NO.
N
00 80'160'
SCALE: 1" = 80'
5/14/2021
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PROJECT NAME:146th & HAZEL DELL, PARCEL 2, BUILDING 2, PHASE B
FES PROJECT #:2104003
DATE:5/14/21
DESIGN STORM:10 Year
COMPOSITE BASINS TRAVEL
UP DOWN BASIN c A c*A Tc I Q SUM Tc I Q TIME
#(acres)(min) (in/hr) (cfs) (c*A) (min) (in/hr) (cfs) (min)
608 610 608 0.82 0.33 Ac.0.27 5 min. 6.12 in/hr 1.64 cfs 1.74 9 min. 5.38 in/hr 9.37 cfs 0.7 min.
610 613 610 0.73 0.61 Ac.0.45 5 min. 6.12 in/hr 2.76 cfs 2.47 10 min. 5.22 in/hr 12.90 cfs 0.3 min.
The above is an analysis of the existing pipe network to demonstrate the proposed improvements fit within the previous design parameters. All are existing pipes.
STRUCTURE BASINS
STORM SEWER DESIGN CALCULATIONS
RATIONAL METHOD PEAK RUNOFF
F:\2021\2104003 - Hazel Dell Bldg Expansion\02 Civil\Engr\Drainage\FES_Storm_Sewer_Design
5/14/2021
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PROJECT NAME:146th & HAZEL DELL, PARCEL 2, BUILDING 2, PHASE B
FES PROJECT #:2104003
DATE:5/14/2021
DESIGN STORM: 10 Year
DESIGN MANN. CAP. FULL ACTUAL ACTUAL
UP DOWN Q L DIA. SLOPE MTRL COEFF. Q VEL. DEPTH VEL.
(cfs) (ft) (in) %n (cfs) (ft/s) (in) (ft/s) UP DOWN UP DOWN UP DOWN
608 610 9.37 287 LF 18 in. 1.00% RCP 0.013 10.53 cfs 5.98 ft/s 13.1 in. 6.75 ft/s 784.09 780.38 779.10 776.23 3.3 2.5
610 613 12.90 142 LF 18 in. 1.76% RCP 0.013 13.97 cfs 7.93 ft/s 13.5 in. 9.01 ft/s 780.38 777.36 776.16 773.66 2.5 2.0
The above is an analysis of the existing pipe network to demonstrate the proposed improvements fit within the previous design parameters. All are existing pipes.
STORM SEWER DESIGN CALCULATIONS
PIPE SIZING CALCULATIONS
RIM ELEV.
STRUCTURE
COVER (ft) INVERT ELEV.
F:\2021\2104003 - Hazel Dell Bldg Expansion\02 Civil\Engr\Drainage\FES_Storm_Sewer_Design
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PROJECT NAME:146th & HAZEL DELL, PARCEL 2, BUILDING 2, PHASE B
FES PROJECT #:2104003
DATE:5/14/2021
STRUCTURE/BASIN
I.D.
TOTAL
DRAINAGE
AREA
% Grass % Gravel/Pvmt % Rooftop Weighted
(Ac.) 0.25 0.85 0.90 C
608 0.33 Ac.11% 18%71%Weighted C= 0.82
14,225 SF 1,600 SF 2,525 SF 10,100 SF
610 0.61 Ac.22% 44%34%Weighted C= 0.73
26,767 SF 5,800 SF 11,867 SF 9,100 SF
RUNOFF COEFFICIENTS CALCULATIONS
WEIGHTED RUNOFF COEFFICIENTS
F:\2021\2104003 - Hazel Dell Bldg Expansion\02 Civil\Engr\Drainage\FES_Storm_Sewer_Design
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APPENDIX F – PREVIOUS PROJECT DRAINAGE
CALCULATIONS
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