Cookham Cemetery
Written Scheme of Investigation for
an Archaeological Evaluation
CONTENTS
1 Introduction
2 Location & nature of site
3 Archaeological Background
4 Aims of the Evaluation
5 Techniques
6 Method
7 Recording
8 Contexts
9 Features & Finds
10 Plans
11 Photography
12 Finds
13 Conservation
14 Outreach
15 Evaluation Reports
16 Archives
17 General
18 Health & Safety
19 Copyright & Confidentiality
20 Standards & Procedures
21 Report & Archive
22 Bibliography & References
Fig. 1 Site Location
Fig. 2 Site survey
Fig. 3 Survey data
Fig. 4 Geophysics & trial trench positions
Appendix A. Geophysics method
Introduction
Marlow Archaeological Society (MAS) has been commissioned by Cookham Parish Council (client), by letter dated 5/3/08, to carryout an archaeological evaluation of an area of land intended as an extension to the south of the existing cemetery. This evaluation is further to a planning application ref. 06/02242 now withdrawn. It is likely that a further application will be made, therefore this WSI is formulated so as to comply with the provisions of PPG16 and a brief issued by Berkshire Archaeology (BA) further to the withdrawn application 06/02242, so as to be applicable to a future application. So as to comply with the professional requirements of the BA brief, MAS has employed Colin Berks MIFA MAAIS of Minas Tirith Ltd (Archaeological Survey) (MT,ArcServ) to supply overall project management. Simultaneously MAS has instructed MT,ArcServ to carryout all survey, setting out, recording, drawings, reporting and to write this WSI.
Limited funding but adequate for the initial works and excavation is being supplied by Cookham Parish Council. Beyond this if specialist services are required further approval and funding has to be arranged. This might mean that environment samples and significant finds will have to be securely held to await a decision from the Parish Council.
In order to meet standard archaeological best practice, the appointed MIFA will ensure appropriate level supervision to any trenched evaluation and recording. This document details how the MIFA & MAS will carry out the evaluation, to meet the standards set down by the IFA, MAP2 and the local standards required by Berkshire Archaeology generally as setout in the brief dated 19/10/06. Any survey and recording by MT,ArcServ will also be to English Heritage guidelines as is this companies standard practice.
Location & nature of site
The site is located to the west of the Marlow to Maidenhead single line railway, alongside the Maidenhead Road, at a position about halfway between Furze Platt and Cookham stations. It is south-east of Lower Mount farm, north of Halfway Houses and centred at NGR SU 8835:8395. The level is c.40 AOD over Taplow Gravel laid down during the Pleistocene and Holocene periods, with Lower Chalk geology of the Cretaceous. The gross site area is; 4447 sqm, 0.44 hectares, 1.10 acres, with a perimeter of 306m (measured from the site survey.
The site lies at the edge of the gravel and chalk on the Boyn Hill Terrace of the Thames Valley. The ground slopes down gently to a stream 650m to the east. To the west the ground rises sharply to 100m AOD. To the south a dry valley defines the plateau.
The entrance to the cemetery is off Long Lane and the site off the Maidenhead Road. Location plan on Google [Fig. 1, Drg. No. 905/1], site survey [Fig. 2, Drg. No. 905/2]
Archaeological Background
The Berkshire Archaeology brief of 19/10/06 draws attention to the following archaeology in the vicinity:
"The site is identified as being of archaeological potential, due to a number of find spots and sites noted on the SMR for this area.
Deposits from a site 200-300m to the south-east for example contain one of the richest sources of Palaeolithic hand axes in England.
There are other known deposits within the immediate area that contain Palaeolithic tools. 250m to the west a series of Bronze Age structures, pits, post holes, hearths, a well and a ditch were found during excavation prior to gravel extraction.
In addition, 250m to the east a 72 ft Iron Age rectangular enclosure and post holes and later Roman occupation were located during excavation prior to gravel extraction. 270m to the north-east a Roman farmstead was discovered during development.
Saxon pottery has been found 200-300m to the north-east. Furthermore a double linear feature is visible on aerial photographs 200-300m to the south.
Therefore this is a site of high archaeological potential. Furthermore as the site lies with such close proximity of so many archaeological sites, it is possible that stratified sequences of those outlying activities from those archaeological sites will occur".
[Details of the above are awaited]
Local verbal information not recorded, mentions an excavation in the 1960’s, just the other side of the railway to the east of the site. What information is available indicates that Roman material was revealed, including a well and building material.
Aims of the Evaluation
To determine the existence or absence of archaeological remains and should archaeological remains be present, to assess the general nature and significance.
To determine the extent, condition, state of preservation, nature, character, quality and date of any archaeological remains present.
To determine or confirm the approximate extent of any remains.
To determine the degree of complexity of the horizontal and or vertical stratigraphy present.
To assess the associations and implications of any remains encountered with reference to the historic landscape.
To determine the historic implication of the remains with reference to economy, status, utility and social activity.
To determine or confirm the likely range, quality and quantity of the artefact evidence present.
To determine the potential of the site to provide palaeo-environmental, geo-archaeological and or economic evidence and the forms in which such evidence may be present.
To make available the results of the investigation.
To help define any relevant research priorities if additional archaeological investigation proves necessary.
Techniques
It is proposed that the evaluation will be carried out in stages:
Survey and geophysics
Trial trench
4% sample trenching of the site area 4447 sqm, being five 20m * 1.8m trenches plus the trial trench.
Any mechanical excavation will be carried out to a safe depth determined so as to avoid or minimise damage to any archaeological remains. Machinery used will be of an appropriate type fitted with a toothless bucked of 1.8<2m width.
All excavation will be closely supervised by the appointed MIFA
Machining will stop at the first archaeological deposit or natural, whichever is encountered first. Archaeological deposits will not be machined.
Spoil will be scanned for artefacts, which will be record as "bulk" and retained.
All features will be excavated by hand. All features irrespective of age will be recorded in detail.
Environment, soil and where appropriate chemical samples will be taken for future analysis.
Method
A site survey as EH guidelines having an accuracy of +-10mm [Fig. 2. Drg. No. 905/2]. If appropriate a close contour survey [not yet considered beneficial]
Geophysics of the site to determine any features and to assist in positioning trenches to produce the most beneficial result. The positions to be agreed with BA.
Magnetometer (gradiometer) by BARG
Resitivity by MAS
Plotting and analysis by MT,ArcServ.
The method statement for the geophysics is at "Appendix A". Plotting and analysis by MT,ArcServ will use CAD, Surfer8 and if warranted ArcheoSurveyor.
The BA brief and Parish Council, indicate that the site is undisturbed apart from ploughing. It is however known that gravel extraction took place adjacent but it is not known exactly where the edge was or the extent of associated works, relative to this site. Some 10<15m from the east boundary there is a marked change to the slope which may indicate a change to the underlying ground. Inspection of an open grave in the existing cemetery shows a shallow layer of topsoil, over a mix of soil and gravel and at about 1.5m a change to apparently clean yellow/red sand and gravel, it is not however clear if this stratigraphy extends to the site in question. It seems likely that the boundaries between layers may be unclear and therefore it is desirable to check the likely stratigraphy if only to ascertain a safe working depth for machine excavation. To this end it is proposed to, excavate by hand an east west trial trench starting near the east boundary of a length determined on site by the objective but likely to be some 20m in and up to 1.5m wide at 90d from the survey base line as shown on. [Fig. 4, Drg. No. 905/4]. A decision will be taken on site whether to extend part of the trial trench in a south north direction.
After the results of the geophysics and trial trench are available, an interim report will be produced followed by liaison with BA to agree main trench positions at which time a trench setting out and recording drawing will be produced.
The exposed deposits will be hand cleaned. Any archaeological features/deposits will be sufficiently sampled in order to date, characterise and assess them only. No further excavation will take place without prior agreement by the County Archaeological Officer.
All features and deposits will be issued with unique context numbers, and context recording will be in accordance with the established practice. Colour transparency and black-and-white negative photographs will be taken of all archaeological features.
If deposits of environmental significance/potential are uncovered they will be sampled in accordance with the project aims and English Heritage Guidelines Environmental Archaeology (2002). In particular, deposits of clearly waterlogged, organic or charcoal rich nature will be targeted, as well as a representative samples of fills of cut features and other deposits.
The stratigraphy of the trenches will be recorded even where no archaeological deposits are identified.
Spoil heaps will be monitored to allow analysis of the spatial distribution of artefacts.
Supervision of the opening of trenches and general direction of excavation will be by Colin Berks MIFA. With general management, logistics and volunteer workers supplied by MAS.
Monitoring of the evaluation will be undertaken by Berkshire Archaeological Services.
A visual inspection of the entire site will be undertaken. This will include the examination of any available exposures (e.g. recently cut field ditches, graves and utilities).
The 1.8m * 20m trenches will be excavated to first significant archaeology or natural by JCB under the direction of the MIFA.
At the natural or archaeological level the trenches will be swept by metal detector and indications of ferrous material marked with plastic pegs so at to alert the excavators but not excavated separately.
Following machine clearance, all faces of the trench that require examination or recording will be cleaned using appropriate hand tools.
Spoil heaps will be monitored in order to recover artifacts to assist in the analysis of the spatial distribution of artifacts. Modern artifacts will be noted but not retained.
All investigation of archaeological levels and or features will be by hand, with cleaning, examination and recording both in plan and section.
Within significant archaeological levels a number of features required to meet the aims will be hand excavated. Pits and post holes will be subject to a 50% sample by volume. Linear features will be sectioned as appropriate. Features not suited to excavation within narrow trenches will not be sampled. No archaeological deposits will be entirely removed unless this is unavoidable. It is not necessarily the intention that all trial trenches will be fully excavated to natural stratigraphy, but the depth of archaeological deposits across the entire site will be assessed. The stratigraphy of all evaluation trenches will be recorded even where no archaeological deposits have been identified.
Any excavation, both by machine and by hand, will be undertaken with a view to avoiding damage to any archaeological features or deposits which appear to be worthy of preservation in situ.
Different environmental sampling strategies may be employed according to established research targets and the perceived importance of the strata under investigation. Bulk samples of a standard 40 liters will normally be taken. Bulk samples will be taken from any waterlogged deposits present for macroscopic plant remains. Columns for pollen analysis will be taken if appropriate. Mollusc samples will be collected if present. Other bulk samples for small animal bones and other small artifacts may be taken from appropriate contexts.
Any finds of human remains will be left insitu, covered and protected and the coroner informed. If removal is essential it will only take place under appropriate Home Office license, section 25 of the Burial Act 1857 and local environmental health regulations, and if appropriate in compliance with the Disused Burial Grounds (Amendment) Act 1981.
All finds of gold and silver will be removed to a safe place and reported to the local Coroner according to the procedures relating to Treasure Trove. Where removal can not be effected on the same working day as the discovery, suitable security measures will be taken to protect the finds from theft.
MAS welcomes monitoring visits by the local authorities' archaeological representatives. Timetables of the on-site work will be provided in order that visits can be made at appropriate times. It is generally intended that the non-intrusive geophysics will take place immediately, followed a few weeks later by the trial trench subject to approval by the PC. Details of dates will be provided at least a week in advance of work.
After recording, the trench bottom will be marked with colored tape, back filled with excavated material and the turf/surface reinstated.
RECORDING
All finds and features irrespective of age will be accurately recorded in 3D in accordance with the appropriate English Heritage guidelines.
Trenches will be aligned parallel to the survey base lines. For manual recording a trench recording peg (TP1 etc.) will be inserted near the south east corner of each trench and another near the north east or south west corner, aligned to the survey base line to establish for each trench XX and YY recording lines.
The position of each trench peg will be recorded by GTS from survey position SPA thereby enabling the precise position of any find or feature to be converted to the site grid.
Levels for manual recording to be by dumpy using the level datum (00.00) on the chapel step.
Complex features will be recorded using a planning frame with the frame position recorded either from the trench peg or the main survey datum.
Any major features will be recorded by GTS from survey position SPA using SPB alignment and the level datum on the chapel step.
If an accurate OS level can be ascertained for the level datum on the chapel step, then all levels will be converted to OS.
Contexts
A block of numbers, in a continuous sequence will be allocated to each trench.
Written descriptions will be recorded on pro forma sheets comprising factual data and interpretative elements.
Features & Finds
All features will be recorded in 3d by GTS from the site master datum.
Finds and artifacts in the archaeological layers will be recorded in 3d from the trench datum. Finds and artifacts will be given a trench and find number and bagged separately except for significant grouped material which will be bagged and identified as a group. A running sequential finds record will be kept separately for each trench recording the find number, 3d position, context, material and preliminary identification of type.
Plans
These will normally drawn at 1:100. Detailed and site plans will be at an appropriate scale. Burials will be drawn at scale 1:10.
The site grid will be accurately tied into the National Grid and located on the 1:2500 or 1:1250 map of the area.
A register of plans will be kept.
Sections
Long sections of trenches showing layers will be drawn at 1:50. Sections of features or short lengths of trenches will be drawn at 1:20.
A register of sections will be kept.
Generally all sections will be tied in to Ordnance Datum with detail related to the site datum
Photography
A full colour (digital) photographic record, illustrating in both detail and general context the principal features and finds discovered will be maintained. The photographic record will also include working shots to illustrate more generally the nature of the archaeological work. Photographs will be recorded on Photographic Record Sheets.
FINDS
All identified finds and artifacts will be retained, although certain classes of building material or post medieval pottery may sometimes be discarded after recording if an appropriate sample is retained. However, no finds will be discarded without the prior approval of the nominated representative of the local authority and the receiving Museum.
The pottery and other relevant artifacts will be scanned to assess the date range of the assemblage.
All finds and samples will be treated in a proper manner and to standards agreed in advance with the approved recipient museum.
The level of artifact analysis will be sufficient to establish date ranges of archaeological deposits, a general assessment of the types of pottery and other artifacts to assist in characterizing the archaeology, and to establish the potential for all categories of artifacts should further archaeological work be necessary.
At the beginning of a project, the local relevant museum and the landowner will be contacted regarding the preparation and deposition of the archive and finds.
Environmental samples, if appropriate will be processed and scanned for potential date.
CONSERVATION
Any significant finds requiring specialist excavation will be left insitu to be excavated and conserved by the conservation specialist.
Specialist conservation and analysis services will be provided by Oxford Archaeology subject to funding approval by the Parish Council.
OUTREACH
In general Outreach is at the discretion of the Parish Council
The Parish Council, Community organization, MAS members, Local and regional Societies have been invited to visit and take part.
The final report will be available on the MT,ArcServ website, www.arcserv.org.
EVALUATION REPORTS
Style and format of the report will be determined by BA, but will include as a minimum the following:
A location plan of trenches and/or other fieldwork in relation to the proposed development.
Plans and sections of features located at an appropriate scale.
A section drawing showing depth of deposits including present ground level with Ordnance Datum, vertical and horizontal scale.
A summary statement of the results.
A table summarizing per trench the features, classes and numbers of artifacts contained within, spot dating of significant finds and an interpretation.
Separate specialist finds reports as appropriate.
A reconsideration of the methodology used.
An interpretation of the archaeological findings both within the site and within their wider landscape/townscape setting.
Copies of the report will be supplied to the Archaeological Officer monitoring the works. Copies of the report will also be supplied to the County Sites and Monuments Record on the understanding that it will become a public document after an appropriate period of time (normally six months).
If the evaluation works generate archaeological results of importance which merit wider publication, this will be done via appropriate publications.
ARCHIVES
The site archive, including finds and environmental material, will be ordered, catalogued, labeled and conserved and stored according to the UKIC Guidelines for the preparation of excavation archives for long-term storage.
The site archive will be prepared to at least the minimum acceptable standard defined in Management of Archaeological Projects 2, English Heritage 1991.
The site archive will be deposited with the relevant receiving Museum at the earliest opportunity unless further archaeological work on the site is expected within one year of completion of the archive. MAS will advise the landowner that any artifacts resulting from the project work should be given to the relevant Museum.
The archive will be in accordance with the guidelines published in "Guidelines for the preparation of Excavation Archives" for long-term storage (United Kingdom Institute for Conservation 1990) and "Standards in the Museum care of archaeological collections".
GENERAL
The requirements of the objective will be met in full where reasonably practicable.
Any significant variations to the proposed methodology will be agreed with the local authority's archaeological representative in advance.
The scope of work detailed in the main part of the Written Scheme of Investigation is aimed at meeting the aims of the project in a cost effective manner. MAS attempts to foresee possible site specific problems and resource these. However there may be unusual circumstances which have not been included in the costing and program.
Unavoidable delays due to extreme bad weather, vandalism, etc.
Complex structures or objects, including those in waterlogged conditions, requiring specialist removal.
Extensions to specified trenches or feature sample sizes requested by the archaeological curator.
Trenches requiring shoring or stepping, ground contamination, unknown services, poor ground conditions requiring additional plant, specialist reinstatement of surfaces (i.e. tarmac, turf).
Delays caused by resource difficulties
HEALTH AND SAFETY and INSURANCE
All work will be carried out to the requirements of Health and Safety at Work, etc. Act 1974, The Management of Health and Safety Regulations 1992, the SCAUM (Standing Conference of Archaeological Unit Managers) H & S manual Health and Safety in Field Archaeology 1991.
MAS holds Public Liability Insurance, details will be supplied on request.
COPYRIGHT and CONFIDENTIALITY
MT,ArcServ and MAS will retain full copyright of any commissioned reports, or other project documents, under the Copyright, Designs and Patents Act 1988 with all rights reserved.
STANDARDS AND PROCEDURES
MAS shall conform to the standards of professional conduct outlined in the Institute of Field Archaeologists' Code of Conduct, the IFA Code of Approved Practice for the Regulation of Contractual Arrangements in Field Archaeology, the IFA Standards and Guidance for Field Evaluations.
Report and archive
A report of the findings will be produced as soon as practical after the completion of fieldwork. Copies will be sent to the County Archaeological Service and the Sites and Monuments Record Office.
The site archive will be created in accordance with the guidelines published in Guidelines for the preparation of Excavation Archives for long-term storage (UK Inst. for Conservation 1990) and standards in the Museum care of archaeological collections - see Appendix 8. The project archive will ultimately be deposited with the Berkshire County Museum Service, Reading.
It is noted that "Berkshire Archaeology supports the Online Access to Index of Archaeological Investigations project" with a requirement that "an online OASIS form is completed at http:ads.ahds.ac.uk/project/oasis/
Bibliography and References
Ÿ
English Heritage 2002 Guidelines Environmental ArchaeologyMap2 Management of Archaeological Projects
Ÿ
IFA 1999 Standard and Guidance for archaeological field evaluationsŸ
MOLAS Archaeological Site ManualŸ
OA 2000 Environmental Sampling Guidelines and Instruction Manual