appendix k water quality - green airport | pvd | rhode island€¦ · green airport improvement...

T.F. Green Airport Improvement Program Environmental Impact Statement and Final Section 4(f) Evaluation

Appendix K

Water Quality

T.F. Green Airport Warwick, Rhode Island

Prepared for Federal Aviation Administration

Prepared by

July 2011


This Page Intentionally Left Blank


T.F. Green Airport Improvement Program FEIS Appendix

Appendix K, Water Quality, of this Final Environmental Impact Statement (FEIS) provides updated and new technical information since the publication of the Draft Environmental Impact Statement (DEIS) in July 2010. The DEIS, provided on the enclosed DVD, contained a corresponding technical report, Water Quality Technical Report, describing significant technical information pertaining to the water quality analysis. It is intended that this FEIS appendix provide an update to the DEIS technical report. Reviewers should consult both the DEIS and FEIS for full documentation.

Table of Contents

K.1 HydroCAD Calculations ......................................................................... K-1

K.2 Pond Sizing Analysis .......................................................................... K-15

K.3 Water Quality Monitoring Data ............................................................. K-21

Appendix K Water Quality K-i July 2011 \\Mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_App_K_WQ\PVD_Appendix_K_WQ_JUL_2011.doc

eheacockSticky NoteMarked set by eheacock



Appendix K Water Quality K-ii July 2011 \\Mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_App_K_WQ\PVD_Appendix_K_WQ_JUL_2011.doc


K.1 HydroCAD Calculations

The following sections provide the results of the HydroCAD Calculations for the 2004 Baseline Condition and the proposed T.F. Green Airport Improvement Program Preferred Alternative (Alternative B4).

Appendix K Water Quality K-1 July 2011 \\Mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_App_K_WQ\PVD_Appendix_K_WQ_JUL_2011.doc

EX1BBN DP1

BuckeyeBrookNorth ToBuckeyeBrookNorth

EX2WP DP2

WarwickPond ToWarwickPond

EX3BBS DP3

BuckeyeBrookSouth ToBuckeyeBrookSouth

EX4TB DP4

TuscatucketBrook ToTuscatucketBrook

EX5CB DP5

CallahanBrook ToCallahanBrook

DrainageDiagramfor0922806ExistingConditionsSubcat Reach Pond Link PreparedbyVanasseHangenBrustlin,Inc., Printed2/2/2011

HydroCAD9.00 s/n01237 2009HydroCADSoftwareSolutionsLLC

K-3

0922806ExistingConditions TypeIII24hr100Year Rainfall=8.70" PreparedbyVanasseHangenBrustlin,Inc. Printed 2/2/2011 HydroCAD9.00 s/n01237 2009HydroCADSoftwareSolutionsLLC Page2

Timespan=5.0020.00hrs,dt=0.05hrs,301points RunoffbySCSTR20method,UH=SCS

ReachroutingbyStorInd+Transmethod PondroutingbyStorIndmethod

SubcatchmentEX1BBN:BuckeyeBrookRunoffArea=598.000ac 39.98%Impervious RunoffDepth>4.21"FlowLength=8,175' Tc=47.8min CN=66 Runoff=1,436.88cfs 209.596af

SubcatchmentEX2WP:WarwickPond RunoffArea=23.900ac 48.95%Impervious RunoffDepth>4.48"FlowLength=1,213' Tc=23.8min CN=68 Runoff=84.51cfs 8.916af

SubcatchmentEX3BBS:BuckeyeBrookRunoffArea=458.500ac 33.13%Impervious RunoffDepth>3.75"FlowLength=4,962' Tc=44.1min CN=62 Runoff=1,025.46cfs 143.269af

SubcatchmentEX4TB:Tuscatucket RunoffArea=145.600ac 24.04%Impervious RunoffDepth>2.73"FlowLength=2,031' Tc=44.7min CN=53 Runoff=230.28cfs 33.143af

SubcatchmentEX5CB:CallahanBrook RunoffArea=132.900ac 19.49%Impervious RunoffDepth>2.87"FlowLength=1,566' Tc=26.6min CN=54 Runoff=281.90cfs 31.738af

LinkDP1:ToBuckeyeBrookNorth Inflow=1,436.88cfs 209.596af Primary=1,436.88cfs 209.596af

LinkDP2:ToWarwickPond Inflow=84.51cfs 8.916af Primary=84.51cfs 8.916af

LinkDP3:ToBuckeyeBrookSouth Inflow=1,025.46cfs 143.269af Primary=1,025.46cfs 143.269af

LinkDP4:ToTuscatucketBrook Inflow=230.28cfs 33.143af Primary=230.28cfs 33.143af

LinkDP5:ToCallahanBrook Inflow=281.90cfs 31.738af Primary=281.90cfs 31.738af

TotalRunoffArea=1,358.900ac RunoffVolume=426.662af AverageRunoffDepth=3.77" 65.88%Pervious=895.300ac 34.12%Impervious=463.600ac

K-4

http:Primary=281.90http:Inflow=281.90http:Primary=230.28http:Inflow=230.28http:Primary=1,025.46http:Inflow=1,025.46http:Primary=84.51http:Inflow=84.51http:Primary=1,436.88http:Inflow=1,436.88http:Runoff=281.90http:Depth>2.87http:Runoff=230.28http:Depth>2.73http:Runoff=1,025.46http:Depth>3.75http:Runoff=84.51http:Depth>4.48http:Runoff=1,436.88http:Depth>4.21http:span=5.0020.00http:Rainfall=8.70


SummaryforSubcatchmentEX1BBN:BuckeyeBrookNorth

Runoff = 1,436.88cfs@ 12.67hrs,Volume= 209.596af,Depth> 4.21"

RunoffbySCSTR20method,UH=SCS,TimeSpan=5.0020.00hrs,dt=0.05hrs TypeIII24hr100Year Rainfall=8.70"

Area(ac) CN Description 239.100 98 Pavedparking,HSGA 180.600 43 Woods/grasscomb.,Fair,HSGA

8.500 76 Woods/grasscomb.,Fair,HSGC 11.500 82 Woods/grasscomb.,Fair,HSGD

158.300 43 Woods/grasscomb.,Fair,HSGA 598.000 66 WeightedAverage 358.900 60.02%PerviousArea 239.100 39.98%ImperviousArea

Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs)

9.6 50 0.0050 0.09 SheetFlow,

Grass:Short n=0.150 P2=3.30"

1.5 194 0.0110 2.13 ShallowConcentratedFlow,

Paved Kv=20.3fps

36.7 7,931 0.0025 3.60 11.31 PipeChannel,

24.0" Round Area=3.1sf Perim=6.3' r=0.50' n=0.013 Concretepipe,bends&connections

47.8 8,175 Total

SummaryforSubcatchmentEX2WP:WarwickPond

Runoff = 84.51cfs@ 12.33hrs,Volume= 8.916af,Depth> 4.48"


Area(ac) CN Description 11.700 98 Pavedparking,HSGA

0.400 39 >75%Grasscover,Good,HSGA * 11.800 39 >75%Grasscover,Good,HSGA(assumed)

23.900 68 WeightedAverage 12.200 51.05%PerviousArea 11.700 48.95%ImperviousArea

K-5

http:Rainfall=8.70http:5.0020.00http:Rainfall=8.70http:5.0020.00http:1,436.88http:Rainfall=8.70


Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.6 100 0.0030 0.08 SheetFlow,

Grass:Short n=0.150 P2=3.30" 0.3 50 0.0340 2.97 ShallowConcentratedFlow,

Unpaved Kv=16.1fps 2.9 1,063 0.0070 6.02 18.93 PipeChannel,


23.8 1,213 Total

SummaryforSubcatchmentEX3BBS:BuckeyeBrookSouth



Area(ac) CN Description 151.900 98 Pavedparking,HSGA

47.000 39 >75%Grasscover,Good,HSGA 9.200 61 >75%Grasscover,Good,HSGB

35.800 74 >75%Grasscover,Good,HSGC 5.400 80 >75%Grasscover,Good,HSGD

209.200 39 >75%Grasscover,Good,HSGA 458.500 62 WeightedAverage 306.600 66.87%PerviousArea 151.900 33.13%ImperviousArea


Grass:Short n=0.150 P2=3.30" 15.7 1,126 0.0055 1.19 ShallowConcentratedFlow,



44.1 4,962 Total

SummaryforSubcatchmentEX4TB:TuscatucketBrook



K-6



Area(ac) CN Description 35.000 98 Pavedparking,HSGA 29.300 39 >75%Grasscover,Good,HSGA 81.300 39 >75%Grasscover,Good,HSGA

145.600 53 WeightedAverage 110.600 75.96%PerviousArea

35.000 24.04%ImperviousArea



Unpaved Kv=16.1fps 1.2 433 0.0067 5.89 18.52 PipeChannel,


44.7 2,031 Total

SummaryforSubcatchmentEX5CB:CallahanBrook



Area(ac) CN Description 25.900 98 Pavedparking,HSGA 91.100 43 Woods/grasscomb.,Fair,HSGA

0.800 65 Woods/grasscomb.,Fair,HSGB 15.100 43 Woods/grasscomb.,Fair,HSGA

132.900 54 WeightedAverage 107.000 80.51%PerviousArea

25.900 19.49%ImperviousArea



Paved Kv=20.3fps 3.2 881 0.0040 4.55 14.31 PipeChannel,


26.6 1,566 Total

K-7

http:Rainfall=8.70http:5.0020.00http:Rainfall=8.70


SummaryforLinkDP1:ToBuckeyeBrookNorth

InflowArea= 598.000ac, 39.98%Impervious,InflowDepth> 4.21" for 100Yearevent Inflow = 1,436.88cfs@ 12.67hrs,Volume= 209.596af Primary = 1,436.88cfs@ 12.67hrs,Volume= 209.596af,Atten=0%,Lag=0.0min

Primaryoutflow=Inflow,TimeSpan=5.0020.00hrs,dt=0.05hrs

SummaryforLinkDP2:ToWarwickPond

InflowArea= 23.900ac, 48.95%Impervious,InflowDepth> 4.48" for 100Yearevent Inflow = 84.51cfs@ 12.33hrs,Volume= 8.916af Primary = 84.51cfs@ 12.33hrs,Volume= 8.916af,Atten=0%,Lag=0.0min


SummaryforLinkDP3:ToBuckeyeBrookSouth



SummaryforLinkDP4:ToTuscatucketBrook



SummaryforLinkDP5:ToCallahanBrook



K-8

http:5.0020.00http:5.0020.00http:5.0020.00http:1,025.46http:1,025.46http:5.0020.00http:5.0020.00http:1,436.88http:1,436.88http:Rainfall=8.70

1BBN

BuckeyeBrookNorth

3BBS

BuckeyeBrookSouth

4TB

TuscatucketBrook

5CB

CallahanBrook

DP1

ToBuckeyeBrookNorth

2WP

WarwickPond

DP2

ToWarwickPond

DP3

ToBuckeyeBrook

South

DP4

ToTuscatucketBrook

DP5

ToCallahanBrook

DrainageDiagramfor0922806ProposedConditionsALTB4Subcat Reach Pond Link PreparedbyVanasseHangenBrustlin,Inc., Printed2/2/2011 HydroCAD9.00 s/n01237 2009HydroCADSoftwareSolutionsLLC

K-9

0922806ProposedConditionsALTB4 TypeIII24hr100Year Rainfall=8.70" PreparedbyVanasseHangenBrustlin,Inc. Printed 2/2/2011 HydroCAD9.00 s/n01237 2009HydroCADSoftwareSolutionsLLC Page2

Timespan=5.0020.00hrs,dt=0.05hrs,301points RunoffbySCSTR20method,UH=SCS

ReachroutingbyStorInd+Transmethod PondroutingbyStorIndmethod

Subcatchment1BBN:BuckeyeBrook RunoffArea=597.900ac 43.30%Impervious RunoffDepth>4.44"FlowLength=8,175' Tc=47.8min CN=68 Runoff=1,514.28cfs 221.151af

Subcatchment2WP:WarwickPond RunoffArea=27.200ac 47.43%Impervious RunoffDepth>4.36"FlowLength=1,213' Tc=23.8min CN=67 Runoff=93.73cfs 9.882af

Subcatchment3BBS:BuckeyeBrook RunoffArea=458.200ac 42.89%Impervious RunoffDepth>4.44"FlowLength=4,962' Tc=44.1min CN=68 Runoff=1,214.47cfs 169.708af

Subcatchment4TB:TuscatucketBrook RunoffArea=160.500ac 30.90%Impervious RunoffDepth>3.18"FlowLength=2,031' Tc=44.7min CN=57 Runoff=299.58cfs 42.520af

Subcatchment5CB:CallahanBrook RunoffArea=115.600ac 18.94%Impervious RunoffDepth>2.87"FlowLength=1,566' Tc=26.6min CN=54 Runoff=245.21cfs 27.607af

LinkDP1:ToBuckeyeBrookNorth Inflow=1,514.28cfs 221.151af Primary=1,514.28cfs 221.151af

LinkDP2:ToWarwickPond Inflow=93.73cfs 9.882af Primary=93.73cfs 9.882af

LinkDP3:ToBuckeyeBrookSouth Inflow=1,214.47cfs 169.708af Primary=1,214.47cfs 169.708af

LinkDP4:ToTuscatucketBrook Inflow=299.58cfs 42.520af Primary=299.58cfs 42.520af

LinkDP5:ToCallahanBrook Inflow=245.21cfs 27.607af Primary=245.21cfs 27.607af

TotalRunoffArea=1,359.400ac RunoffVolume=470.869af AverageRunoffDepth=4.16" 60.29%Pervious=819.600ac 39.71%Impervious=539.800ac

K-10

http:Primary=245.21http:Inflow=245.21http:Primary=299.58http:Inflow=299.58http:Primary=1,214.47http:Inflow=1,214.47http:Primary=93.73http:Inflow=93.73http:Primary=1,514.28http:Inflow=1,514.28http:Runoff=245.21http:Depth>2.87http:Runoff=299.58http:Depth>3.18http:Runoff=1,214.47http:Depth>4.44http:Runoff=93.73http:Depth>4.36http:Runoff=1,514.28http:Depth>4.44http:span=5.0020.00http:Rainfall=8.70


SummaryforSubcatchment1BBN:BuckeyeBrookNorth



Area(ac) CN Description 258.900 98 Pavedparking,HSGA 182.200 43 Woods/grasscomb.,Fair,HSGA 8.500 76 Woods/grasscomb.,Fair,HSGC 11.500 82 Woods/grasscomb.,Fair,HSGD 136.800 43 Woods/grasscomb.,Fair,HSGA 597.900 68 WeightedAverage 339.000 56.70%PerviousArea 258.900 43.30%ImperviousArea



Paved Kv=20.3fps 36.7 7,931 0.0025 3.60 11.31 PipeChannel,


47.8 8,175 Total

SummaryforSubcatchment2WP:WarwickPond



Area(ac) CN Description 12.900 98 Pavedparking,HSGA 0.400 39 >75%Grasscover,Good,HSGA

* 13.900 39 >75%Grasscover,Good,HSGA(assumed) 27.200 67 WeightedAverage 14.300 52.57%PerviousArea 12.900 47.43%ImperviousArea

K-11







23.8 1,213 Total

SummaryforSubcatchment3BBS:BuckeyeBrookSouth



Area(ac) CN Description 196.500 98 Pavedparking,HSGA 41.900 39 >75%Grasscover,Good,HSGA 8.500 61 >75%Grasscover,Good,HSGB 33.900 74 >75%Grasscover,Good,HSGC 5.400 80 >75%Grasscover,Good,HSGD

172.000 39 >75%Grasscover,Good,HSGA 458.200 68 WeightedAverage 261.700 57.11%PerviousArea 196.500 42.89%ImperviousArea





44.1 4,962 Total

SummaryforSubcatchment4TB:TuscatucketBrook



K-12



Area(ac) CN Description 49.600 98 Pavedparking,HSGA 34.600 39 >75%Grasscover,Good,HSGA 0.100 61 >75%Grasscover,Good,HSGB

* 76.200 39 >75%Grasscover,Good,HSGA(assumed) 160.500 57 WeightedAverage 110.900 69.10%PerviousArea 49.600 30.90%ImperviousArea



Unpaved Kv=16.1fps 1.2 433 0.0067 5.89 18.52 PipeChannel,


44.7 2,031 Total

SummaryforSubcatchment5CB:CallahanBrook



Area(ac) CN Description 21.900 98 Pavedparking,HSGA 88.200 43 Woods/grasscomb.,Fair,HSGA 0.800 65 Woods/grasscomb.,Fair,HSGB 4.700 43 Woods/grasscomb.,Fair,HSGA

115.600 54 WeightedAverage 93.700 81.06%PerviousArea 21.900 18.94%ImperviousArea



Paved Kv=20.3fps 3.2 881 0.0040 4.55 14.31 PipeChannel,


26.6 1,566 Total

K-13

http:Rainfall=8.70http:5.0020.00http:Rainfall=8.70


SummaryforLinkDP1:ToBuckeyeBrookNorth



SummaryforLinkDP2:ToWarwickPond



SummaryforLinkDP3:ToBuckeyeBrookSouth



SummaryforLinkDP4:ToTuscatucketBrook



SummaryforLinkDP5:ToCallahanBrook



K-14

http:5.0020.00http:5.0020.00http:5.0020.00http:1,214.47http:1,214.47http:5.0020.00http:5.0020.00http:1,514.28http:1,514.28http:Rainfall=8.70


K.2 Pond Sizing Analysis

The following graphs provide the pond sizing analysis for the Preferred Alternative (Alternative B4). Included are the Buckeye Brook North drainage area, the Buckeye Brook South drainage area, the Warwick Pond drainage area, and the Tuscatucket Brook drainage area.



Buckeye Brook North Drainage Area - Pond Sizing

Source: HydroCAD TR-20 Pond Sizing Analysis



Buckeye Brook South Drainage Area Pond Sizing




Warwick Pond Drainage Area Pond Sizing




Tuscatucket Brook Drainage Area Pond Sizing




K.3 Water Quality Monitoring Data

The following tables provide water quality monitoring data for Outfalls 10A and 11A/12A from 2006 to 2010. According to RIAC, data from 2004 and 2005 are not available for these outfalls. Dissolved oxygen (DO) is also not available during this time period.



Table K.3-1 Water Quality at T.F. Green Airport Outfall 10A1,2,3

Oil & Propylene TSS2 BOD2 COD2 Grease glycol Iron

Date1 (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) VOCs (g/L) (mg/L) 9/14/2006 59


Table K.3-2 Water Quality at T.F. Green Airport Outfall 11A/12A1,2,3

Oil & Propylene TSS2 BOD2 COD2 Grease glycol Iron

Date1 (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) VOCs (g/L) (mg/L) 9/14/2006




Appendix K: Water QualityTable of ContentsK.1 HydroCAD CalculationsK.2 Pond Sizing AnalysisK.3 Water Quality Monitoring Data

appendix k water quality - green airport | pvd | rhode island€¦ · green airport improvement...

Documents