Quarry Development and Operation – Invitation to Tender

1 – request for tenders

 Invitation to Tender

Westray Development Trust (the ‘company’) invites tenders for the above contract, as detailed below.  This tender relates to the development and operation of Westray Community Quarry, Westray. (Figure 1 refers)

Any potential tenderer is strongly encouraged to conduct a site visit; tenderers should satisfy themselves that they are fully informed in relation to access limitations, to the Island of Westray and from the Westside Road, B9067, as well as ground conditions on site.  Site visits shall be by prior arrangement with the Company.

Expression of Interest

The Company requests that Expressions of Interest be submitted to Mr Andy Makin, WDT in the first instance, detailing quarrying experience

Pre-tender consultation is encouraged, prior to making a formal tender submission.

Expressions of interest should be received by the company no later than noon on 25th May 2018

Tender Submission

This tender is for the provision of two phases of works:

  • Initially site preparatory works, comprising track upgrade and establishment of a stockpile area and quarry access and
  • Secondly the operation of the quarry, on a campaign basis.

There is no prescribed format for tender submissions, electronic submissions via email are preferred.

Please submit costings as noted below, accompanied by a narrative text, presenting as complete a submission as possible and as a minimum to include the key points highlighted in bold in the accompanying Safety, Health and Environmental Conditions and Scope of Works for each phase.

Please submit costings for the preparatory works as a lump sum and a figure for production as further detailed below, per campaign.

Any queries on this invitation should be addressed to Andy Makin, WDT, in the first instance.

Tenders should be received by the company no later than noon on 15th June 2018

This tender is for site establishment and an initial operational campaign; the contract may then be renewed for further operational campaigns without further tendering, at the Company’s discretion.

N.B. the total anticipated duration of quarrying operations is 20 years at an average production of around 4,000tpa, to be worked on a campaign basis. The number and duration of each campaign is not fixed and shall therefore be by prior agreement with the Company.

Stockpile capacity will however be limited, tenders should be based on a production of 10,000 tonnes saleable aggregate per campaign.

It should be noted that quarrying operations are likely to be restricted by planning condition so as avoided during the bird breeding season, April to July inclusive.

For the avoidance of doubt the contract does not include despatch/distribution of products from the quarry.

Any assumptions, variations (exceptions and/or exclusions) should be clearly stated on the tender submission.

2 – HEALTH, SAFETY AND ENVIRONMENTAL CONDITION

Tenderers are required to submit full method statements, for the Company’s approval prior to the commencement of works.  Method statement(s) should include reference to any requirements for CQA (Construction Quality Assurance) and compliance with the Health and Safety at Work Act 1974, the Construction (Design and Management) Regulations 2015 (CDM) and the Quarry Regulations 1999 (as amended).

It is ultimately the contractor’s responsibility to establish the presence of any utilities within influencing distance of the works, whether overhead or buried.  An agricultural water supply is known to cross the site which will require to be re-routed, no other utilities are recorded.

Any damage to field drainage during track upgrade shall be made good.

The contractor is required to hold all relevant qualifications and insurances, evidence of insurance cover will be required and must be maintained throughout the contract term. Personnel shall be competent this must be supported by the appropriate licence/certification for the operation of any equipment/plant being used.

Only authorised vehicles shall enter private land. There shall be NO unnecessary vehicles on private land. Once agreed, all accesses will be adhered to.

Safety Health and Environmental considerations must be detailed prior to commencement of works, including a site drainage plan to include the following:

  • All storage of oil and fuel will be in accordance with the Water Environment (Oil Storage) (Scotland) Regulations 2006. All oil and fuel containers will be placed in suitable containment double bunded sites, with impervious bases, located away from watercourses or drainage paths. The bunded volume will be at least 110% of the storage container.
  • Large-scale storage of fuel will not be required or permitted on site.
  • Any re-fuelling will be carried out where practical off-site and a minimum of 30 m away from watercourses. Any on site re-fuelling shall utilise appropriate containers and funnels to avoid spills.
  • Any hydrocarbon spillages should be attended to without delay and reported to SEPA, the Company and the landowner(s). Oil absorbents (boom and/or loose) to be held on site, to contain contaminants in the event of a watercourse pollution incident occurring.
  • Emergency spill-response kits should be available on site.

3 – scope of quarry operations

  1. Track 1 – This is illustrated on the accompanying drawing (Figure2SiteLayoutV1). Track 1 runs from the WDT track on a north-south alignment and is in private ownership.  Fencing shall remain the responsibility of the landowner, however any damage caused as a result of site preparatory works shall be made good to the satisfaction of the Company and the landowner.  A pre-works visual survey (with agreed note/annotated drawing/ photographs) is therefore strongly recommended.

Reinstate each end of this track so as to be suitable for use by heavy plant, using crushed bottoming to a minimum depth of 200mm with a blinded surface. The remainder of this track is deemed suitable (refer to item 1).

Materials may be won from the quarry or imported to site, the tenderer should specify their approach.

  1. Track 2 – This is illustrated on the accompanying drawing (Figure2SiteLayoutV1). Track 2 runs from Track 1, westward to the quarry site and is in private ownership.  Fencing shall remain the responsibility of the landowner, however any damage caused as a result of site preparatory works shall be made good to the satisfaction of the Company and the landowner.  A pre-works visual survey (with agreed note/annotated drawing/photographs) is therefore strongly recommended.

To scrape to suitable firm foundation, lay suitable terram (or equivalent) geotextile material for its full length and width, lay 200mm of crushed bottoming with a blinded surface.

At the junction between Tracks 1 and 2 to create a turning circle suitable for quarry plant, as necessary to facilitate access to the quarry and to make good the fence line, strainers and gates.

Materials may be won from the quarry or imported to site, the tenderer should specify their approach.

  1. To create two perimeter fences, around the quarry and stockpile sites (Figure 3 refers) with stockproof post and wire fencing – 800mm high shire mesh topped with 2 rows of mild steel double strand barbed wire. Distance between fence posts 3m. Strainers as required but no more than 50m apart. The total length of fencing required, i.e. the total combined perimeter of the two areas is 940m (Quarry area 585m perimeter, Stockpile area 355m perimeter).

Each separate compound is to have a double 16ft gate at the trackside with suitable means of securing and locking the gates.  These should be positioned so as to form a secure crossing area between the quarry and stockpile area when operational, closing to ensure there is no impediment to access for stock and vehicles, on the existing estate track.

Quarry fencing shall include signage in accordance with good practice to warn of ‘deep excavation’.

Alignment is indicative; any adjustment reducing the fenced area (and length required) may be by mutual agreement with the Company.

  1. Prepare the stockpile area (Figure2SiteLayoutV1 refers). Establish site drainage, including a low peripheral bund to contain the stockpile area and an external blind catch ditch. Strip to competent foundation, lay free-draining hardcore/aggregate.

Materials may be won from the quarry or imported to site, the tenderer should specify their approach.

  1. Quarry Development Plans are provided for reference.

A low peripheral bund shall be formed within the fenced quarry area, in order to divert surface flows around the operational area (not shown).  The quarry floor shall be graded to drain at a minimum of 1:200 to ensure no ponding of water, directing incident rainfall to the northernmost corner and a sump/swale as necessary.

The initial working area will be to the east-north-east of the quarry.

Operations shall progress towards the south-west.

No requirement for blasting is envisaged, it is anticipated that the rock at this location may be ripped.

N.B. 4 Phases are illustrated, each equivalent to 2 campaigns each producing 10,000t.

At the completion of each campaign the quarry must be left in a safe and stable condition as required by the Quarry Regulations.

  1. To operate the quarry on a campaign basis, in accordance with the attached development plans, with the aim of producing the following aggregate products:
  • Crushed Bottoming of <75mm
  • Concrete chips of 20mm-10mm
  • Road dressing chips of 10mm
  • Type 1
  • Fine Blinding

It is anticipated that each campaign will recover 10,000 tonnes of saleable aggregate.

Tenderers should refer to thegeological survey report for the quarry site (Available on Request), and are expected to provide an estimate of the percentages of each product from the anticipated available stone.

Anticipated campaign duration should be stated, together with assumed working hours.

Figure1GeneralLocationV1

Figure3FencingPlanV1