DOCSLIB.ORG

Open Space Plan

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Open Space Plan \\mawald\ld\10400.00\reports\2008 OSRP\Cover.indd TOWN OF LEXINGTON Plan Update 2009 TOWN OF LEXINGTON Plan Update 2009 Table of Contents 1. Plan Summary ................................................................................................................. 1-1 2. Introduction ..................................................................................................................... 2-1 2.1 Statement of Purpose ............................................................................................. 2-1 Introduction ............................................................................................................. 2-1 Previous Open Space and Recreation Plans .......................................................... 2-1 2.2 Planning Process and Public Participation ............................................................. 2-5 Planning Process .................................................................................................... 2-5 Public Participation ................................................................................................. 2-6 2.3 Enhanced Outreach and Public Participation ......................................................... 2-7 3. Community Setting ........................................................................................................ 3-1 3.1 Regional Context .................................................................................................... 3-1 Introduction ............................................................................................................. 3-1 Physical Location and Characteristics .................................................................... 3-1 Climate .................................................................................................................... 3-2 Open Space Regional Context ............................................................................... 3-2 3.2 History of the Community ........................................................................................ 3-3 Overview ................................................................................................................. 3-3 3.3 Population Characteristics ...................................................................................... 3-4 Total Population ...................................................................................................... 3-4 Population Distribution and Density ........................................................................ 3-5 Sex and Age Composition ...................................................................................... 3-5 Race and Ethnic Composition ................................................................................. 3-5 Household Composition .......................................................................................... 3-5 Income Characteristics ........................................................................................... 3-7 Environmental Justice Population(s) Characteristics .............................................. 3-9 Implications of Population Composition and Trends ............................................. 3-10 3.4 Growth and Development Patterns ....................................................................... 3-11 Patterns and Trends ............................................................................................. 3-11 Infrastructure ......................................................................................................... 3-14 Long-term Development Patterns ......................................................................... 3-17 4. Environmental Inventory and Analysis .................................................................... 4-1 4.1 Geology, Soils and Topography .............................................................................. 4-1 Geology ................................................................................................................... 4-1 Soils ........................................................................................................................ 4-2 Topography ............................................................................................................. 4-3 \\mawald\ld\10400.00\reports\2008 OSRP\Report Dec 09 FINAL\00-TOC.doc i Table of Contents 4.2 Landscape Character .............................................................................................. 4-4 Introduction ............................................................................................................. 4-4 Major Characteristics or Unusual Geologic Features ............................................. 4-4 Areas of Archaeological Interest ............................................................................. 4-5 4.3 Water Resources .................................................................................................... 4-5 Watersheds ............................................................................................................. 4-5 Surface Water ......................................................................................................... 4-6 Functions of Lexington's Brooks ............................................................................. 4-7 Certified Vernal Pools ............................................................................................. 4-8 Flood Hazard Areas ................................................................................................ 4-8 Wetlands ................................................................................................................. 4-9 Aquifer Recharge Areas .......................................................................................... 4-9 4.4 Vegetation ............................................................................................................... 4-9 Introduction ............................................................................................................. 4-9 Unusual Vegetation Types .................................................................................... 4-11 4.5 Fisheries and Wildlife ............................................................................................ 4-15 Introduction ........................................................................................................... 4-15 Wildlife Corridors ................................................................................................... 4-16 Inventory ............................................................................................................... 4-17 4.6 Scenic Resources and Unique Environments ....................................................... 4-20 Introduction ........................................................................................................... 4-20 4.7 Environmental Challenges .................................................................................... 4-22 5. Open Space and Recreation Inventory ....................................................................... 5-1 5.1 Introduction ............................................................................................................. 5-1 5.2 Types of Open Space and Recreation Land Protection .......................................... 5-3 5.3 Inventory of Open Space and Recreation Resources ............................................. 5-4 5.4 Park and Open Space Equity .................................................................................. 5-5 5.5 Important Open Space and Recreational Resources ............................................. 5-5 6. Community Goals ........................................................................................................... 6-1 6.1 Description of Process ............................................................................................ 6-1 6.2 Goals ....................................................................................................................... 6-4 7. Analysis of Needs ........................................................................................................... 7-1 7.1 Summary of Resource Protection Needs ................................................................ 7-1 General Open Space and Recreation Needs ......................................................... 7-1 Regional Resource Protection Needs ..................................................................... 7-2 Historical Resource Protection Needs .................................................................... 7-2 Water Resource Protection Needs ......................................................................... 7-3 Fisheries and Wildlife Protection Needs ................................................................. 7-3 Vegetation Protection Needs .................................................................................. 7-4 7.2 Summary of Community Needs .............................................................................. 7-4 Park and Recreation Needs .................................................................................... 7-4 Enterprise Fund ...................................................................................................... 7-5 Lexington Parks and Playing Fields ........................................................................ 7-5 5 Year Capital Plan ................................................................................................
Load more

Recommended publications
  • The Bedrock Geology and Fracture Characterization of the Maynard Quadrangle of Eastern Massachusetts
    The Bedrock Geology and Fracture Characterization of the Maynard Quadrangle of Eastern Massachusetts Author: Tracey A. Arvin Persistent link: http://hdl.handle.net/2345/1731 This work is posted on eScholarship@BC, Boston College University Libraries. Boston College Electronic Thesis or Dissertation, 2010 Copyright is held by the author, with all rights reserved, unless otherwise noted. Boston College The Graduate School of Arts and Sciences Department of Geology and Geophysics THE BEDROCK GEOLOGY AND FRACTURE CHARACTERIZATION OF THE MAYNARD QUADRANGLE OF EASTERN MASSACHUSETTS a thesis by TRACEY ANNE ARVIN submitted in partial fulfillment of the requirements for the degree of Master of Science December 2010 © copywrite by TRACEY ANNE ARVIN 2010 ABSTRACT The bedrock geology of the Maynard quadrangle of east-central Massachusetts was examined through field and petrographic studies and mapped at a scale of 1:24,000. The quadrangle spans much of the Nashoba terrane and a small area of the Avalon terrane. Two stratigraphic units were defined in the Nashoba terrane: the Cambrian to Ordovician Marlboro Formation and the Ordovician Nashoba Formation. In addition, four igneous units were defined in the Nashoba terrane: the Silurian to Ordovician phases of the Andover Granite, the Silurian to Devonian Assabet Quartz Diorite, the Silurian to Devonian White Pond Diorites (new name), and the Mississippian Indian Head Hill Igneous Complex. In the Avalon terrane, one stratigraphic unit was defined as the Proterozoic Z Westboro Formation Mylonites, and one igneous unit was defined as the Proterozoic Z to Devonian Sudbury Valley Igneous Complex. Two major faults were identified: the intra-terrane Assabet River fault zone in the central part of the quadrangle, and the south-east Nashoba terrane bounding Bloody Bluff fault zone.
    [Show full text]
  • Mineral Industries and Geology of Certain Areas
    REPORT -->/ OF TFIE STATE GEOLOGIST ON THE S 7 (9 Mineral Industries and Geology 12 of Certain Areas OF -o VERMONT. 'I 6 '4 4 7 THIRD OF THIS SERIES, 1901-1902. 4 0 4 S GEORGE H. PERKINS, Ph. D., 2 5 State Geologist and Professor of Geology, University of Vermont 7 8 9 0 2 4 9 1 T. B. LYON C0MI'ANV, I'RINTERS, ALILiNY, New VORK. 1902. CONTENTS. PG K 1NTRODFCTION 5 SKETCH OF THE LIFE OF ZADOCK THOMPSON, G. H. Perkins ----------------- 7 LIST OF OFFICIAL REPORTS ON VERMONT GEOLOGY ----------------- -- -- ----- 14 LIST OF OTHER PUBLICATIONS ON VERMONT GEOLOGY ------- - ---------- ----- 19 SKETCH OF THE LIFE OF AUGUSTUS WING, H. M. Seely -------------------- -- 22 REPORT ON MINERAL INDUSTRIES, G. H. Perkins ............................ 35 Metallic Products ------------------------------------------------------ 32 U seful Minerals ------------------------------------------------------- 35 Building and Ornamental Stone ----------------------------------------- 40 THE GRANITE AREA OF BAItRE, G. I. Finlay------------------------------ --- 46 Topography and Surface Geology ------------------------------------ - -- 46 General Geology, Petrography of the Schists -------------------------- - -- 48 Description and Petrography of Granite Areas ----------------------------51 THE TERRANES OF ORANGE COUNTY, VERMONT, C. H. Richardson ------------ 6i Topography---------------------------- -............................. 6z Chemistry ------------------------------------------------------------66 Geology --------------------------------------------------------------
    [Show full text]
  • Trail Guide to Lexington's Conservation Land
    TRAIL GUIDE TO LEXINGTON’S CONSERVATION LAND 2013 edition Produced by the Lexington Conservation Stewards Supported by the Lexington Conservation Commission Lexington Conservation STEWARDS First Edition Table of Contents July 2013 Subject Page Map Number Produced by Emily Schadler (Conservation Stewardship Program Overview Map 2 Coordinator for the Town of Lexington Conservation Division) and the Lexington Conservation Stewards. Supported by the Lexington Conservation Welcome 4 Commission. Lexington Conservation Stewards 5 Conservation Area Map Legend 7 Special thanks to members of the Lexington Conservation Stewards for Paint Mine and Hennessey Field 8 1 volunteering their mapping, data collection, and editing services. Simond’s Brook 10 2 Katahdin Woods 12 3 Data for the maps in this book has been provided by the Town of Lexington and the Offi ce of Geographic and Environmental Information (MassGIS), Cranberry Hill 14 4 Commonwealth of Massachusetts Executive Offi ce of Environmental Affairs. Idylwilde 16 5 The information is provided as a reasonably accurate point of reference Juniper Hill 18 6 but is not intended to represent authoritative location. The Town of Lexington Hayden Woods 20 7 shall not be held responsible for the accuracy or misuse of this data. All Dunback Meadow 22 8 information is subject to change without notice. Upper Vine Brook - Cotton Farm 24 9 Historical information on conservation areas was drawn from the Lexington Daisy Wilson Meadow 26 10 Conservation Division’s records and from Historical Guide to Open Space in Joyce Miller’s Meadow 28 11 Lexington by Thomas P. Sileo (1995. Acton, MA - Concepts Unlimited). Thank Liberty Heights 30 12 you to Mr.
    [Show full text]
  • Shawsheen River Watershed Stream Management Plan
    TABLE OF CONTENTS SECTION........................................................................................................................................PAGE NO. 1. INTRODUCTION................................................................................................................................1-1 1.1 Drivers for Study.............................................................................................................................1-1 1.2 Project Objectives...........................................................................................................................1-2 2. STREAM ASSESSMENT...................................................................................................................2-1 2.1 Watershed Description ...................................................................................................................2-1 2.1.1 Sub-Basins.....................................................................................................................................2-1 2.1.1.1 Impervious Cover ...........................................................................................................................2-1 2.1.1.2 Land Uses with High Potential Pollutant Loads..............................................................................2-2 2.1.2 Water Quality in the Shawsheen River Watershed in Lexington ....................................................2-2 2.2 Stream Survey................................................................................................................................2-6
    [Show full text]
  • Flood Insurance Study 25017CV006B
    VOLUME 6 OF 8 MIDDLESEX COUNTY, MASSACHUSETTS (ALL JURISDICTIONS) COMMUNITY NAME COMMUNITY NUMBER ACTON, TOWN OF 250176 ARLINGTON, TOWN OF 250177 Middlesex County ASHBY, TOWN OF 250178 ASHLAND, TOWN OF 250179 AYER, TOWN OF 250180 BEDFORD, TOWN OF 255209 COMMUNITY NAME COMMUNITY NUMBER BELMONT, TOWN OF 250182 MELROSE, CITY OF 250206 BILLERICA, TOWN OF 250183 NATICK, TOWN OF 250207 BOXBOROUGH, TOWN OF 250184 NEWTON, CITY OF 250208 BURLINGTON, TOWN OF 250185 NORTH READING, TOWN OF 250209 CAMBRIDGE, CITY OF 250186 PEPPERELL, TOWN OF 250210 CARLISLE, TOWN OF 250187 READING, TOWN OF 250211 CHELMSFORD, TOWN OF 250188 SHERBORN, TOWN OF 250212 CONCORD, TOWN OF 250189 SHIRLEY, TOWN OF 250213 DRACUT, TOWN OF 250190 SOMERVILLE, CITY OF 250214 DUNSTABLE, TOWN OF 250191 STONEHAM, TOWN OF 250215 EVERETT, CITY OF 250192 STOW, TOWN OF 250216 FRAMINGHAM, TOWN OF 250193 SUDBURY, TOWN OF 250217 GROTON, TOWN OF 250194 TEWKSBURY, TOWN OF 250218 HOLLISTON, TOWN OF 250195 TOWNSEND, TOWN OF 250219 HOPKINTON, TOWN OF 250196 TYNGSBOROUGH, TOWN OF 250220 HUDSON, TOWN OF 250197 WAKEFIELD, TOWN OF 250221 LEXINGTON, TOWN OF 250198 WALTHAM, CITY OF 250222 LINCOLN, TOWN OF 250199 WATERTOWN, TOWN OF 250223 LITTLETON, TOWN OF 250200 WAYLAND, TOWN OF 250224 LOWELL, CITY OF 250201 WESTFORD, TOWN OF 250225 MALDEN, CITY OF 250202 WESTON, TOWN OF 250226 MARLBOROUGH, CITY OF 250203 WILMINGTON, TOWN OF 250227 MAYNARD, TOWN OF 250204 WINCHESTER, TOWN OF 250228 MEDFORD, CITY OF 250205 WOBURN, CITY OF 250229 Map Revised: July 7, 2014 Federal Emergency Management Agency FLOOD INSURANCE STUDY NUMBER 25017CV006B NOTICE TO FLOOD INSURANCE STUDY USERS Communities participating in the National Flood Insurance Program have established repositories of flood hazard data for floodplain management and flood insurance purposes.
    [Show full text]
  • Town of Upton Open Space and Recreation Plan
    ____________________________________________________________________________________________________________ MAY 2011 TOWN OF UPTON D OPEN SPACE AND RECREATION PLAN a f North t Prepared by: Upton Open Space Committee (A Subcommittee of the Upton Conservation Commission) ____________________________________________________________________________________________________________ Town of Upton D OPEN SPACE rAND RECREATION PLAN a f t May 2011 Prepared by: The Upton Open Space Committee (A Subcommittee of the Upton Conservation Commission) Town of Upton Draft Open Space and Recreation Plan – May 2011 __________________________________________________________________________________________________________ DEDICATION The members of the Open Space Committee wish to dedicate this Plan to the memory of our late fellow member, Francis Walleston who graciously served on the Milford and Upton Conservation Commissions for many years. __________________________________________________________________ ACKNOWLEDGEMENTS Upton Open Space Committee Members Tom Dodd Scott Heim Rick Holmes Mike Penko Marcella Stasa Bill Taylor Assistance was provided by: Stephen Wallace (Central Massachusetts Regional Planning Commission) Peter Flinker and Hillary King (Dodson Associates) Dave Adams (Chair, Upton Recreation Commission) Chris Scott (Chair, Upton Conservation Commission) Ken Picard (as a Member of the Upton Planning Board) Upton Board of Selectmen. Trish Settles (Central Massachusetts Regional Planning Commission) __________________________________________________________________
    [Show full text]
  • Flood Risk Report Concord River Watershed
    Flood Risk Report Concord River Watershed Middlesex and Worcester Counties, Massachusetts: Report Number 001 2/27/2013 CONCORD FLOOD RISK REPORT i This page left intentionally blank. CONCORD RIVER WATERSHED FLOOD RISK REPORT Project Area Community List Community Name Community Name Town Of Acton Town Of Tewksbury Town Of Ashland Town Of Upton Town Of Bedford Town Of Wayland Town Of Berlin Town Of Westborough Town Of Billerica Town Of Westford Town Of Bolton Town Of Weston Town Of Boxborough Town Of Boylston Town Of Carlisle Town Of Chelmsford Town Of Clinton Town Of Concord Town Of Framingham Town Of Grafton Town Of Harvard Town Of Holliston* Town Of Hopkinton Town Of Hudson Town Of Lincoln Town Of Littleton City Of Lowell City Of Marlborough Town Of Maynard Town Of Natick Town Of Northborough Town Of Sherborn Town Of Shrewsbury Town Of Southborough Town Of Stow Town Of Sudbury CONCORD RIVER WATERSHED FLOOD RISK REPORT i This page left intentionally blank. CONCORD RIVER WATERSHED FLOOD RISK REPORT Preface The Department of Homeland Security (DHS), Federal Emergency Management Agency’s (FEMA) Risk Mapping, Assessment, and Planning (Risk MAP) program provides states, tribes, and local communities with flood risk information and tools that they can use to increase their resilience to flooding and better protect their citizens. By pairing accurate floodplain maps with risk assessment tools and planning and outreach support, Risk MAP has transformed traditional flood mapping efforts into an integrated process of identifying, assessing, communicating, planning for, and mitigating flood‐related risks. This Flood Risk Report (FRR) provides non‐regulatory information to help local or tribal officials, floodplain managers, planners, emergency managers, and others better understand their flood risk, take steps to mitigate those risks, and communicate those risks to their citizens and local businesses.
    [Show full text]
  • Fracture Characterization Mapping for Regional Geologic Studies: the Hydrostructural Domain Approach, Ayer Quadrangle, Massachusetts
    Fracture Characterization Mapping for Regional Geologic Studies: The Hydrostructural Domain Approach, Ayer Quadrangle, Massachusetts Stephen B. Mabee And Joseph P. Kopera Office of the Massachusetts State Geologist Geosciences Department University of Massachusetts 611 North Pleasant Street Amherst, MA 01003 Abstract While traditional bedrock geologic maps contain valuable information, they commonly lack data on brittle fracture characteristics and distributions. The increased need for better understanding of groundwater flow behavior in bedrock aquifers has made this data critical. The concept of hydrostructural domains is used to redefine bedrock mapping units based on an assemblage of lithologic and fracture characteristics thought to be important controls on groundwater flow and recharge. These maps are constructed from detailed field observations and measurements of 2000-3000 fractures from 60-70 stations across a 7.5' quadrangle. Hydrostructural domains are displayed on the map as traditional lithologic units would be, with detailed descriptions and photos of the fracture systems contained in each hydrostructural “unit”. In the Ayer quadrangle, such domains closely correspond with bedrock lithology and ductile structural history. Steeply dipping metasedimentary rocks of the Merrimack Belt have pervasive, closely spaced, throughgoing fractures developed parallel to foliation, and therefore may provide excellent potential for vertical recharge and foliation-parallel flow. Where these rocks are intensely cut by a strong subhorizontal cleavage, a parallel fracture set dominates providing an opportunity for lateral flow. Massive granites generally have a well-developed, widely-spaced orthogonal network of fracture zones which may provide excellent local recharge. High-grade gneisses of the Nashoba formation have poorly developed fracture sets except near regional shear zones, where foliation parallel fractures and cross-joints may provide good vertical recharge and provide a strong northeast trending flow anisotropy.
    [Show full text]
  • Petrology of the High-Alumina Hoosac Schist from the Chloritoid+Garnet Through the Kyanite+Biotite Zones in Western Massachusetts1
    332 PETROLOGY OF THE HIGH-ALUMINA HOOSAC SCHIST FROM THE CHLORITOID+GARNET THROUGH THE KYANITE+BIOTITE ZONES IN WESTERN MASSACHUSETTS1 by John T. Cheney, Department of Geology, Amherst College, Amherst, MA 01002 and John B. Brady, Department of Geology, Smith College, Northampton, MA 01063 INTRODUCTION The eastern limb of the Berkshire anticlinorium of western Massachusetts (Figure 1) is a complex, multiply- deformed, polymetamorphic, Taconian/Acadian orogenic terrane. The geologic framework of this area is well established, originally by the mapping of B.K. Emerson (1892, 1898, 1899) and Pumpelly et al. (1894), as summarized on the Massachusetts geologic map of Emerson (1917), and more recently by the mapping of L.M. Hall, N.L. Hatch, S.A. Norton, P.H. Osberg, N.M. Ratcliffe, and R.S. Stanley, as summarized on the Massachusetts geologic map of Zen et al. (1983). The summary reports of USGS Professional Paper 1366 in 1988 as well as the work of Hatch et al. (1984), Stanley and Ratcliffe (1985), and Sutter et al. (1985), among others, provide a provocative regional synthesis that brings into sharp focus a variety of interrelated structural, stratigraphic, petrologic, and geochronologic problems. Despite vigorous efforts, our ability to constrain the timing of many fundamental events is still hampered by both the complexity of the terrane and a lack of data. As reviewed by Karabinos and Laird (1988), differentiating between the effects of different metamorphic events remains quite problematic in much of the terrane. The recent work of Hames et al. (1991) and Armstrong et al. (1992) emphasizes the problem of differentiating between Taconian and Acadian orogenic effects along the zone of maximum overlap, which generally coincides with the axis of the Berkshire massif.
    [Show full text]
  • Burlington Admission to the MWRA Waterworks System
    THE COMMONWEALTH OF MASSACHUSETTS WATER RESOURCES COMMISSION 100 CAMBRIDGE STREET, BOSTON MA 02114 REPORT OF THE FINDINGS, JUSTIFICATIONS, AND DECISION OF THE WATER RESOURCES COMMISSION Relating to the Approval of the Town of Burlington’s Request for an Interbasin Transfer Pursuant to M.G.L. Chapter 21 § 8C DECISION On November 12, 2020, by a ten to one (10-1) vote, the Massachusetts Water Resources Commission (WRC) approved the Town of Burlington’s request for an Interbasin Transfer to join the Massachusetts Water Resources Authority (MWRA) Water Works System. This vote was taken after review of the facts provided by the Town of Burlington, analysis of the associated data, and consideration of comments received concerning this request. INTRODUCTION On November 26, 2019, the WRC received a request from the Town of Burlington for approval of an action to increase the present rate of interbasin transfer under the Interbasin Transfer Act (ITA) (M.G.L. Chapter 21 §§ 8B-8D) as part of a Draft Environmental Impact Report (DEIR) submitted to the Massachusetts Environmental Policy Act (MEPA) office. The DEIR proposed a water supply transfer through an interconnection to MWRA. Additional information was requested by the WRC and received in the Final EIR, submitted in February 2020. The Secretary’s Certificate on the FEIR was issued on April 17, 2020. The WRC accepted Burlington’s application as complete at its May 14, 2020 meeting. Burlington is proposing to purchase a maximum of 6.5 million gallons per day (MGD) of water from MWRA to supplement its existing water supply source, the Mill Pond Reservoir (Figure 1).
    [Show full text]
  • Legacy Sediment Controls on Post-Glacial Beaches of Massachusetts
    University of Massachusetts Amherst ScholarWorks@UMass Amherst Masters Theses Dissertations and Theses March 2019 Legacy Sediment Controls on Post-Glacial Beaches of Massachusetts Alycia DiTroia University of Massachusetts Amherst Follow this and additional works at: https://scholarworks.umass.edu/masters_theses_2 Part of the Geology Commons, Geomorphology Commons, and the Sedimentology Commons Recommended Citation DiTroia, Alycia, "Legacy Sediment Controls on Post-Glacial Beaches of Massachusetts" (2019). Masters Theses. 738. https://doi.org/10.7275/13437184 https://scholarworks.umass.edu/masters_theses_2/738 This Open Access Thesis is brought to you for free and open access by the Dissertations and Theses at ScholarWorks@UMass Amherst. It has been accepted for inclusion in Masters Theses by an authorized administrator of ScholarWorks@UMass Amherst. For more information, please contact [email protected]. Legacy sediment controls on post-glacial beaches of Massachusetts A Thesis Presented By ALYCIA L. DITROIA Submitted to the Graduate School of the University of Massachusetts Amherst in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE February 2019 Department of Geosciences © Copyright by Alycia L. DiTroia 2019 All Rights Reserved Legacy sediment controls on post-glacial beaches of Massachusetts A Thesis Presented By ALYCIA L. DITROIA Approved as to style and content by: _____________________________________________ Jonathan D. Woodruff, Chair _____________________________________________ Stephen B. Mabee, Member _____________________________________________ William P. Clement, Member _____________________________________________ Julie Brigham-Grette, Department Head Department of Geosciences ABSTRACT LEGACY SEDIMENT CONTROLS ON POST-GLACIAL BEACHES OF MASSACHUSETTS FEBRUARY 2019 ALYCIA DITROIA, B.S., UNIVERSITY OF MASSACHUETTS AMHERST M.S., UNIVERSITY OF MASSACHUSETTS AMHERST Directed by: Professor Jonathan D.
    [Show full text]
  • Appendix 4 LCESS Technology Information
    Appendix 4: Additional Technical Information 1. Geothermal Potential of Cambridge In order to understand the geothermal potential of the aquifers below the city it was necessary to assess the Geology. Cambridge is located in the Milford-Dedham Zone and specifically in the Boston Basin (Figure 1). The geology of the Boston basin consists of Cambridge Argillite (PrZc), Roxbury Conglomerate (PrZr) and Melaphyre (volcanic deposits, related to basalt) which is part of the Roxbury Conglomerate. A cross section just North of Cambridge is shown in Figure 2. The figure shows that underlying the Roxbury Conglomerate, the Mattapan Volcanic Complex (Zm) and the Dedham Granite (Zdngr) are found. Deep Geothermal To investigate the deep geothermal (>1km depth) potential of the aquifers below the city Ramboll contacted the University of Massachusetts and the Geological Energy Systems dept. at the University of Glasgow, Scotland (which shares a geological history with Massachusetts). The University of Massachusetts conducted the Massachusetts Geothermal Data Project, which has produced maps outlining the geothermal potential of the existing aquifers in the state. Based on the work they have done, the argillites in the Cambridge Basin are not an obvious deep geothermal target, and are currently not on their list of potential Massachusetts targets (even when considering low temperature requirements of around 140⁰F/60⁰C). Figure 1 Map of the Milford-Dedham Zone with subzones. The location of Cambridge is indicated with the red circle. (Goldsmith, 19911) 1 Goldsmith (1991). Stratigraphy of the Milford-Dedham Zone, Eastern Massachusetts: An Avalonian Terrane, The Bedrock Geology of Massachusetts, U.S. Geological Survey Professional Paper 1366-E, p.
    [Show full text]