Horsley Witten Group, Inc.

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Bridgewater State UniversityVirtual Commons - Bridgewater State UniversityPhase II Final Report Taunton River Watershed Project2011Final Report: Appendix D. Mill River park andRiverwalk at City Hall, Taunton – SupportingInformationHorsley Witten Group, Inc.This item is available as part of Virtual Commons, the open-access institutional repository of Bridgewater State University, Bridgewater, Massachusetts.Recommended CitationHorsley Witten Group, Inc. (2011). Final Report: Appendix D. Mill River park and Riverwalk at City Hall, Taunton – SupportingInformation. Taunton River Watershed Project Phase II Final Report. Item 12.Available at: http://vc.bridgew.edu/taunton_riv_ph2/12APPENDIX D.   MILL RIVER PARK AND RIVERWALK AT CITY HALL, TAUNTON - SUPPORTING INFORMATION     August 19, 2009   Mr. Brian Marques, Chair City of Taunton Conservation Commission City Hall 15 Summer Street Taunton, MA 02780   Re: Taunton River Watershed Plan – Potential Demonstration Project  Intersection of Summer Street and Spring Street, Taunton, Massachusetts   Dear Mr. Marques and Members of the Conservation Commission:  On behalf of our client, Bridgewater State College, we are requesting your consideration and assistance to cooperate in the design of a potential demonstration stormwater management and habitat enhancement project at the above referenced location.  The Horsley Witten Group, Inc. (HW) has been retained by Bridgewater State College and a multi-agency/organization Steering Committee to develop a two-phased watershed planning project within the Taunton River Watershed.  The first phase of the project was finished late last year and involved an evaluation of existing conditions and an assessment of future strategies for protecting drinking water supplies, and environmental quality through effective wastewater, stormwater, and habitat management.    The current phase of the plan has two major components, one involving the identification of a series of demonstration projects within the watershed that can help restore or protect environmental resources and a second consisting of an assessment of local ordinances and regulations to identify and recommend changes to potential impediments to environmentally sensitive growth and development.  It is for the first component that we are contacting you and your Commission membership.    We have been in contact with Ms. Michele Restino, your Conservation Agent, to see if she knew of any candidate project locations that might be appropriate as demonstration sites.  On Thursday, July 9th, we met with Ms. Restino to review the parking lot behind City Hall that drains directly to the Mill River (see Attached Figure).  Our discussions involved a potential project that would include managing and treating stormwater runoff from the up-gradient parking lot, enhancing the vegetative buffer between the parking lot and the river, and developing an invasive species management plan for the area.  We understand that the site is also being considered for a new Skate Park as well as to accommodate a possible river path system.   We Mr. Brian Marques August 19, 2009 Page 2  believe that all of these potential uses and/or management measures can be accommodated at this location and are compatible.  HW’s role and scope of work for this phase of the watershed planning effort includes identifying potential demonstration sites as well as developing conceptual design plans to a sufficient level to apply for relevant permits and to seek implementation funding through grant opportunities (i.e., designed to the 75% level).  We are currently in the process of identifying up to 20 potential demonstration sites across the watershed and will be evaluating and prioritizing candidate sites over the next two months so as to present a list of preferred projects to our Steering Committee sometime in mid- to late September for their consent.  Once directed to do so, we will be developing conceptual designs for up to six projects throughout the watershed.    Therefore, there is no need for the City or anyone else to help fund this current work.  We simply seek your approval to proceed with the collection of existing information and your cooperation to provide access to the site, assist with coordination with other projects in the area, and to provide comments and feedback on the conceptual design if this project is one of the six sites chosen for the 75% design stage.  If you have any questions regarding the specifics of this proposal, we would be happy to discuss these either through Ms. Restino, or directly before the Commission at an upcoming regularly scheduled public hearing.  If you are in agreement with this proposal, and can let us know whether or not you are in a position to support this site as a candidate for a watershed demonstration project, we would appreciation hearing from you.  Please feel free to contact me if you have questions or need further clarification.  Sincerely  THE HORSLEY WITTEN GROUP, INC.  Richard A. Claytor, Jr., P.E. Principal Engineer   SPRING STREETSPRING LANELEONARD COURTSUMMER STREET±100Feet*USGS Color Ortho Imagery, MassGIS 2008Aerial PhotoMill River-Summer StreetTaunton, MADraft6/30/09 ecR:\8123 Taunton River WS PH II\Task 3 Demo Projects\Taunton - City of potential projects\Mill River-Summer StreetLegendParcels  August 19, 2009   Mr. Brian Marques, Chair City of Taunton Conservation Commission City Hall 15 Summer Street Taunton, MA 02780   Re: Taunton River Watershed Plan – Potential Demonstration Project  Boyden Wildlife Refuge, Cohannet Street, Taunton, Massachusetts   Dear Mr. Marques and Members of the Conservation Commission:  On behalf of our client, Bridgewater State College, we are requesting your consideration and assistance to cooperate in the design of a potential demonstration stormwater management and habitat enhancement project at the above referenced location.  The Horsley Witten Group, Inc. (HW) has been retained by Bridgewater State College and a multi-agency/organization Steering Committee to develop a two-phased watershed planning project within the Taunton River Watershed.  The first phase of the project was finished late last year and involved an evaluation of existing conditions and an assessment of future strategies for protecting drinking water supplies, and environmental quality through effective wastewater, stormwater, and habitat management.    The current phase of the plan has two major components, one involving the identification of a series of demonstration projects within the watershed that can help restore or protect environmental resources and a second consisting of an assessment of local ordinances and regulations to identify and recommend changes to potential impediments to environmentally sensitive growth and development.  It is for the first component that we are contacting you and your Commission membership.    We have been in contact with Ms. Michele Restino, your Conservation Agent, to see if she knew of any candidate project locations that might be appropriate as demonstration sites.  On Thursday, July 9th, we met with Ms. Restino to review the steep bank along the Three Mile River (see Attached Figure).  Our discussions involved a potential project that would include stabilizing the steep bank above the river and managing runoff from the top of the bank.  HW’s role and scope of work for this phase of the watershed planning effort includes identifying potential demonstration sites as well as developing conceptual design plans to a sufficient level to apply for relevant permits and to seek implementation funding through grant opportunities Mr. Brian Marques August 19, 2009 Page 2  (i.e., designed to the 75% level).  We are currently in the process of identifying up to 20 potential demonstration sites across the watershed and will be evaluating and prioritizing candidate sites over the next two months so as to present a list of preferred projects to our Steering Committee sometime in mid- to late September for their consent.  Once directed to do so, we will be developing conceptual designs for up to six projects throughout the watershed.    Therefore, there is no need for the City or anyone else to help fund this current work.  We simply seek your approval to proceed with the collection of existing information and your cooperation to provide access to the site, assist with coordination with other projects in the area, and to provide comments and feedback on the conceptual design if this project is one of the six sites chosen for the 75% design stage.  If you have any questions regarding the specifics of this proposal, we would be happy to discuss these either through Ms. Restino, or directly before the Commission at an upcoming regularly scheduled public hearing.  If you are in agreement with this proposal, and can let us know whether or not you are in a position to support this site as a candidate for a watershed demonstration project, we would appreciation hearing from you.  Please feel free to contact me if you have questions or need further clarification.  Sincerely  THE HORSLEY WITTEN GROUP, INC.  Richard A. Claytor, Jr., P.E. Principal Engineer   COHANNET STREETNUTHA TCH L ANEWINTHROP STREETPARKER TERRACE±400FeetAerial PhotoGertrude M. Boyden Wildlife Refuge1298 Cohannet StreetTaunton, MADraftR:\8123 Taunton River WS PH II\Task 3 Demo Projects\Taunton - City of potential projects\Gertrude M. Boyden Wildlife Refuge - June 30, 2009 ecLegendSite ParcelParcels*USGS Color Ortho Imagery, MassGIS 2008INSPECTOR: J. HENDERSONDATE: 5/27/20100.0 '  13.0FILL0.4 'PAVEMENT12.6FILL2.5 'MEDIUM SAND          10 YR 7/210.5FILL7.0 'SILT LOAM      10 YR 5/2       6.0TP-1ESHGW EL. 9 (SOIL MOTTLING)INSPECTOR: J. HENDERSONDATE: 5/27/20100.0 '  11.0FILL0.3 ' PAVEMENT 10.8FILL3.0 'MEDIUM SAND          10 YR 7/28.0A B3.3 'SANDY LOAM   10 YR 4/1 7.8B B4.3 'SANDY LOAM  10 YR 5/36.7C 17.0 'FINE SAND     10 YR 7/3     4.0C 27.5 'SILTY CLAY LOAM           5 B 7/1     3.5TP-2ESHGW EL. 7 (SOIL MOTTLING)PART # PIPE SIZE A B (MAX) H L W12 in 6.50 in 10.00 in 6.50 in 25.00 in 29.00 in(300 mm) (165 mm) (254 mm) (165 mm) (635 mm) (737 mm)15 in 6.50 in 10.00 in 6.50 in 25.00 in 29.00 in(375 mm) (165 mm) (254 mm) (165 mm) (635 mm) (737 mm)18 in 7.50 in 15.00 in 6.50 in 32.00 in 35.00 in(450 mm) (191 mm) (381 mm) (165 mm) (813 mm) (889 mm)24 in 7.50 in 18.00 in 6.50 in 36.00 in 45.00 in(600 mm) (191 mm) (457 mm) (165 mm) (914 mm) (1143 mm)30 in 10.50 in 7.00 in 53.00 in 68.00 in(750 mm) (267 mm) (178 mm) (1346 mm) (1727 mm)36 in 10.50 in 7.00 in 53.00 in 68.00 in(900 mm) (267 mm) (178 mm) (1346 mm) (1727 mm)1510NP1810NP1210NP2410NP3012NP N/A3612NP N/ASidewalk Crossing Culvert ScheduleCulvert # Pipe FromPipe To Dia. (in) Outside Diam. (in)No. of PipesLength (ft) Type Starting Invert (ft)Ending Invert (ft)Pipe CoverSlope1 FES-2 IN-1 8.0 9.1 2 21.2 HDPE 10.11 10.00 0.84 0.0052 FES-3 IN-2 8.0 9.1 2 17.5 HDPE 10.79 10.70 1.48 0.005Notes: FES - Flared End Section; IN - Inlet; HDPE - High-Density PolyethyleneBioretention Material Specifications Material Specification  Notes  Bioretention Soil Filter Media to contain: ? 85-88% sand  ? 8-12% soil fines (< 2% clay) ? 3-5% organic matter  USDA soil types loamy sand or sandy loam.  Volume of filter media based on 110% of plan volume to account for settling or com-paction.  Organic matter shall be well aged (6-12 months), well aerated, leaf compost or approved equivalent.  Mulch Layer Fine shredded hardwood mulch.  Well Aged (6 months minimum).  . A 2 to 3 inch layer on the surface of the filter bed.  Mix half into soil filter media.  Filter Fabric Non-woven geotextile fabric with flow rate of > 110 gallon/minutes/square foot.  Class “C” ap-parent opening size (ASTM-D-4751) grab ten-sile strength (ATSM-D-4632) burst strength (ASTM-D-4833)  For use over underdrains (extend 1 foot -1.5 feet each side) and side walls of bioreten-tion excavation. Pea Gravel  3/8” washed stone For use between the Bioretention Soil and the approved subgrade/underdrain gravel.  Gravel      Underdrain Jacket  AASHTO M-43  Washed, clean and free of all fines.  Underdrain  4” rigid schedule 40 PVC pipe, with 3/8” perfo-rations @  6” o.c. meeting ASTMD 1785 or AASHTO M-278 (Or equivalent corrugated HDPE if shown in drawings).   Perforated pipe for length of bioretention cell, and non-perforated pipe as needed to connect with storm drain system.  T’s and Y’s as needed depending on underdrain configuration. Underdrain Cleanouts Non perforated schedule 40 PVC pipe, PVC elbow, cap, and all associated fittings  Extend cleanout pipes to surface with vented caps at Ts and Ys. Erosion  Control  Blanket Woven, 100% biodegradable jute fiber 7.70 lbs/1000 sqft.  Bionet S150BN or approved equivalent  To be used on 3:1 side slopes of bioreten-tion area.   Plant  Material All plant material shall conform, in all respects, to the guidelines of the “American Standard for Nursery Stock”, latest edition  Plant species and quantities as specified in the Drawings.   Grass Seed New England Conservation/Wildlife/Mix or ap-proved equivalent Application rate 25 lbs/ acres or per seed manufacturer’s requirements.  No.Bottom Surface Area (sf)Lowest Top Elevation/Spillway (ft)Design Freeboard (ft)OVF Rim  (ft)Ponding Depth (ft)Bottom Elev. (ft)1 OVFDepth Mulch (ft)Bottom Mulch (ft)Depth Planting Soil (ft)Bottom Planting Soil (ft)Depth Pea Gravel (ft)Bottom Gravel (ft)Min. Underdrain Stone cover (in.)Underdrain Pipe Size (in)Underdrain Distal Inv (ft)Length Underdrain (ft)Slope Underdrain (ft/ft)Underdrain Inv In (ft)Outlet Inv (ft)2Bottom Underdrain Stone (ft)Distal Underdrain Stone Depth (ft)Outlet Depth Stone (ft)1 2,920 11.25 0.50 10.75 0.75 10.00 DI-1 0.25 9.75 1.00 8.75 0.50 8.25 3.00 4.00 7.63 53 0.005 7.36 7.26 7.07 0.92 1.18Abbreviations: SA Bottom Surface Area CB Catchbasin Stone Depth Distal Stone Depth must be = or > Thickness of underdrain pipe + stone aboveOVF Overflow Inv Invert Underdrain thickness 0.33Notes: Stone above 0.17 3" of stone above minus 1" into pea gravel layer 1 Bottom elevation = Surface of shredded organic layer (see detail) Total 0.5 Distal BIORETENTION SCHEDULE:Riverside Plant ListKey Botanical Name Common Name Size SpacingBNH 6 Betula nigra 'Hertitage' Hertitage River Birch 10/12' B&B, multistem As ShownQB 8 Quercus bicolor Swamp White Oak 2.5"-3" cal. As ShownCOBB 17 Cephalanthus occidentalis Button Bush 3' - 4' h. As ShownCAM 11 Cornus amomum Silky Dogwood 3' - 4' h. As ShownCSAF 6 Cornus sericea 'Arctic Fire' Artic Fire Red Twig Dogwood 3' - 4' h. As ShownHV 6 Hamamelis virginiana Common Witchhazel 6' - 8' h. As ShownLB 6 Lindera benzoin Spice Bush #3 As ShownCVM 138 Coreopsis verticillata  'Moonbeam' Moonbeam Coreopsis #1 18" O.C.EDLJ 140 Eupatorium dubium  'Little Joe' Little Joe Pye Weed #2 18" O.C.GM 328 Geranium maculatum Wild Geranium #1 18" O.C.IVE 202 Iris versicolor Blue Flag #1 18" O.C.JE 202 Juncus effusus Soft Rush #1 18" O.C.LC 468 Lobelia cardinalis Cardinal Flower #1 18" O.C.LSP 128 Lobelia siphilitica Blue Cardinal Flower #1 18" O.C.OSE 545 Onoclea sensibilis Sensitive Fern #1 18" O.C.OC 233 Osmunda cinnamomea Cinnamon Fern #2 24" O.C.PP 321 Pachysandra procumbens Allegany Pachysandra #1 18" O.C.PVHM 69 Panicum virgatum 'Heavy Metal' Heavy Metal Switch Grass #2 30" O.C.PVS 35 Panicum virgatum 'Shenandoah' Shenandoah Switch Grass #2 36" O.C.PAF 124 Polystichum arcostinchoides Christmas dagger fern #1 18" O.C.RHG 193 Rudbeck ia fulgida 'Goldsturm' Black-Eyed Susan #1 18" O.C.SR 151 Solidago rugosa 'Fireworks' Fireworks Wrinkleleaf Goldenrod #1 18" O.C.TIC 224 Tiarella cordifolia Heartleaf Foamflower #1 18" O.C.VV 138 Veronicastrum virginicum Culver's Root #2 18" O.C.MOWED GRASS MIX SEE SPECSTreesShrubsGround Cover/Grasses/PerennialsBioretention Plant ListKey Botanical Name Common Name Size SpacingARA 6 Acer rubrum  'Autumn Flame'     Autumn Flame Swamp Maple 2.5"-3" cal. As ShownCSAF 10 Cornus sericea 'Arctic Fire' Artic Fire Red Twig Dogwood 3' - 4' h. As ShownFM 19 Fothergilla major 'Mt. Airy' Mount Airy Fothergilla #3 As ShownIG 7 Ilex glabra Inkberry #3 As ShownLB 6 Lindera benzoin Spice Bush #3 As ShownCVM 92 Coreopsis verticillata  'Moonbeam' Moonbeam Coreopsis #2 18" O.C.EDLJ 96 Eupatorium dubium  'Little Joe' Little Joe Pye Weed #1 18" O.C.HHB 77 Heliopsis helianthoides 'Ballerina' Ballerina False Sunflower #1 24" O.C.IVE 107 Iris versicolor Blue Flag #1 18" O.C.JE 107 Juncus effusus Soft Rush #1 18" O.C.LS 137 Liatris spicata Blazing Star #1 18" O.C.LC 96 Lobelia cardinalis Cardinal Flower #1 18" O.C.LSP 89 Lobelia siphilitica Blue Cardinal Flower #1 18" O.C.PVHM 61 Panicum virgatum 'Heavy Metal' Heavy Metal Switch Grass #2 30" O.C.PVS 34 Panicum virgatum 'Shenandoah' Shenandoah Switch Grass #2 30" O.C.RHG 169 Rudbeck ia fulgida 'Goldsturm' Black-Eyed Susan #1 18" O.C.SR 89 Solidago rugosa 'Fireworks' Fireworks Wrinkleleaf Goldenrod #1 18" O.C.VV 92 Veronicastrum virginicum Culver's Root #2 18" O.C.MOWED GRASS MIXSEE SPECSUN MOWED GRASS MIX NEW ENGLAND CONSERVATION MIXShrubsGround Cover/Grasses/PerennialsTreesITEM NUMBERDESCRIPTION ESTIMATED QUANTITYUNIT UNIT PRICE TOTAL AMOUNT1.0 STRAWBALES & SILT FENCE FOR EROSION CONTROL 1,000 LINEAR FOOT $10.00 $10,0002.0 BIORETENTION FACILITY 3,000 SQUARE FOOT $27.50 $82,5003.0 8" HDPE DRAINAGE PIPE 120 LINEAR FOOT $30.00 $3,6004.0 18" HDPE DRAINAGE PIPE 80 LINEAR FOOT $50.00 $4,0005.0 18" HDPE FLARED END SECTION 1 EACH $800.00 $8006.0 EROSION CONTROL MAT FOR REINFORCED SWALES 350 SQUARE YARD $16.00 $5,6007.0 PAVED DRAINAGE FLUME 2 EACH $600.00 $1,2008.0 SIDEWALK BRIDGE DRAINAGE INLET 3 EACH $1,400.00 $4,2009.0 RIPRAP OUTFALLS 3 EACH $2,000.00 $6,00010.0 SEDIMENT FOREBAY 300 SQUARE FOOT $12.00 $3,60011.0 SWALE EXCAVATION 120 CUBIC YARD $13.00 $1,56012.0 LOAM & SEED FOR SWALES 350 SQUARE YARD $9.00 $3,15013.0 RIPRAP OVERFLOW SPILLWAY 1 EACH $3,000.00 $3,00014.0PLANTINGS (EXCL. BIORETENTION FACILITY, BUT INCL. BUFFER RESTORATION AND AREA BETWEEN RIVERWALK AND BIORETENTION)N/A EACH N/A $76,00015.0 PLANTING SOIL AT TREES (ASSUME 4.7 CU. YDS/TREE X 19 TREES) 89 CUBIC YARD $30.00 $2,67016.0 PLANTING SOIL AT LAWN AREAS (ASSUME 6" DEPTH) 52 CUBIC YARD $30.00 $1,56017.0 PLANTING SOIL AT PLANTING BEDS (ASSUME 12" DEPTH) 206 CUBIC YARD $30.00 $6,18018.0 SEEDING OF LAWN AREAS 1,390 SQUARE YARD $5.00 $6,95019.0 SHREDDED PINE BARK MULCH (3" DEPTH FOR TREES AND BEDS, ASSUME .30 CYDS/TREE) 58 CUBIC YARD $35.00 $2,03020.0 MOBILIZATION/DEMOBILIZATION 1 EACH $2,000.00 $2,00021.0 SILT SOCK 550 LINEAR FOOT $12.00 $6,60022.0 GEOMEMBRANE LINER INSTALLATION 8,500 SQUARE FOOT $4.00 $34,00023.0 PERMANENT SLOPE STABILIZATION 1,000 SQUARE YARD $12.00 $12,00024.0 COIR ROLL INSTALLATION 550 LINEAR FOOT $10.00 $5,50025.0 RESET RIPRAP 700 SQUARE FOOT $3.00 $2,10026.0 CONTRACTOR INSPECTIONS 3 EACH $1,200.00 $3,60027.0 LINER REMOVAL AND DISPOSAL 1 LUMP SUM $10,000.00 $10,0008/26/201075% DESIGN PLANS TAUNTON MILL RIVER WALK AND SKATE PARKTAUNTON, MATAUNTON RIVER WATERSHED PLAN - GATEWAY CITY PARKSCONSTRUCTION COST ESTIMATEPrepared by: Horsley Witten Group, Inc. Page 1 of 228.0 EROSION/SEDIMENT CONTROL 1 LUMP SUM $10,000.00 $10,000$310,400311,000$             Owner Contingency 20% 63,000$               374,000$          NOTES:THE CONTINGENCY IS PROVIDED FOR VARIABILITY IN THE BIDDING CLIMATE, PROJECT CHANGES BEFORE BIDDING AND CHANGE ORDERS DUE TO UNFORSEEN CONDITIONS, BASED ON PLANS ADVANCED TO THE CONSTRUCTION DOCUMENT STAGE.SUB TOTALESTIMATED BID PRICEESTIMATED CONSTRUCTION BUDGETPrepared by: Horsley Witten Group, Inc. Page 2 of 2

Final Report: Appendix D. Mill River park and Riverwalk at City Hall, Taunton – Supporting Information

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Final Report: Appendix D. Mill River park and Riverwalk at City Hall, Taunton – Supporting Information

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