Appendix C1 - Civica · supply, is forecast at Circa £1.7m. The Present Value of these costs has been calculated at £474,061 using the rates shown below. (see Appendix 1) This figure

Northstowe Pumping Station – Preliminary Budget and Programme Report 1

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Appendix C1

Webb’s Hole Pumping Station, Northstowe Preliminary Budget and Programme Report March 2013


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Contents 1 Introduction 3

2 Budget Cost Review 4

BREAKDOWN OF BUDGET COST 4 BUDGET ASSUMPTIONS 5

3 Costs to Gateway 1 7

4 Preliminary Programme 8

5 Whole Life Cost 8

APPENDIX 1 – WLC Table 10

APPENDIX 2 – Preliminary Programme 12


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1 Introduction This report has been commissioned to provide South Cambridgeshire District Council (SCDC) with an initial scheme budget, preliminary programme and whole life cost estimate for the Environment Agency to deliver a pumping station at Webb’s Hole Sluice on behalf of SCDC. The report has been compiled after a short desktop study of the preliminary design, specification and various documents which date back to 2010, when the scheme was originally instigated. The drawings and specification are currently at outline stage and readers should be mindful that a number of assumptions have had to be made at this early stage in the process.


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2 Budget Cost Review A review of the preliminary drawings, specification and previous costing exercises was undertaken to provide a budget for the scheme. Please see the following pages for details on a number of the assumptions which have been applied. BREAKDOWN OF BUDGET COST Summary Gateway 1 Costs Budget (Feb-12) Remaining Cost to Achieve GW1 (Detailed in Section 3 below) 53,242 Sub Total 53,242 Summary On-Costs Design 20,000 Site Setup 57,115 Construction Supervision & Preliminaries 144,328 Client Project Management 75,375 Contactor Project Management 27,625 Preconstruction Works 75,350 On Costs 76,238 Contractors Fee 79,304 Risk (20%) 273,737 Sub Total 829,072 Summary Construction Costs Civil Works Pumping Station 415,874 Civil Works Outfall 21,517 M&E Works Pumping Station 434,032 Other Works 44,225 Sub Total 915,648 Grand Total 1,797,963 Note: The above table represents the cost to complete the scheme only. No account of previous costs has been included for.


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BUDGET ASSUMPTIONS In order to produce the budget costing the following assumptions have been made: M&E Costs The Mechanical and Electrical work was originally priced by Bedford Pumps in 2010 based on a submersible system. The latest specification has altered this to Extended Spindle pumps. Bedford Pumps have subsequently been approached and confirmed a budget price of £ 275,000 which is inclusive of the following:

• Off DA.45.04.06 (Extended Spindle) Pump sets, driven by 30kw motors.

• 1 set Station Steel pipework and air valves terminating 1m outside the pumping station.

• 1 Off Composite Control Panel and Building services. • Cabling • CFD Model test. • Delivery, Installation and Commissioning

Excluded items (And as such included separately within budget)

Supply and installation of :- • Penstock • Trash Screen + local control panel • External Pipework • Telemetry • Access Steelwork

The supplier also confirmed that the current lead time for the plant would be circa 30 weeks however this would be subject to factory loading at time of order. Civil Engineering Works Cost A review of the principal quantities was undertaken where information was available. A number of changes to the quantities and rates used in previous budgets have been made based on a re-measurement and benchmarking exercise. The overall cost is expected to be less than the estimate provided by Anglian Water Services in November 2012. The current design has been priced but there may be a potential for creating efficiencies in the design of the enveloping structure. It has been assumed that concrete walls will be cast on site but there may be an opportunity to use pre-cast concrete sections.


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Supervision / PM Costs Contractor supervision has been assumed at 1 part-time site agent and 1 full-time foreman. Costs for an EA Project manager plus a Clerk of Works have been included based on 50% input. An allowance of 20% has been included for a contractor project manager plus 60% for contractor commercial support. Risk An inclusion of 20% client risk has been made for budgeting purposes. This will be further developed as the design progresses but is commensurate with similar projects at this stage in the process. There are a number of key risks, which could impact on programme and costs, which it is important to be aware of. Three top risks are highlighted below: • Ground conditions – the construction involves earthworks, therefore

any unforeseen ground conditions which change the nature of the works could result in increased time and cost.

• Adverse weather – the programme currently involves construction during the winter period. Adverse weather conditions and high water levels could impact on the construction programme and lengthen the time required to complete construction.

• Environmental constraints – prior to construction a survey for protected species will need to be undertaken, the presence of any protected species will have to be managed and could impact on the construction start date.

All risks will be mitigated and managed through the delivery of this project, and the costs for mitigation are included in the overall project costs. In addition to the mitigation measures, there will be a need to retain a risk budget (currently identified as 20%) to manage any risks that are realised.


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3 Costs to Gateway 1 Pre-Gateway 1 Costs These costs have been calculated on a time charge basis and total £53,242. An assumption has been made that the outline design is close to complete so a reduced sum has been included for this aspect. Pre construction costs have been benchmarked against allowances used for this stage on similar capital projects. Where individual roles have not been assigned indicative rates have been applied. The budget is based on the assumption that full Business Case will be required, which will involve the preparation of a Project Appraisal Report for submission to the EA Regional Project Assurance Board. We have also assumed that a new contract would need to be set up through a competitive tender. Pre Gateway One Costs Qty Unit Rate Estimate (£)

Appraisal Develop Budget Cost & Prelim Programme 1 Sum 2,000 2,000 Develop Procurement Strategy 5 Hrs 48 240 Startup Meeting 12 Hrs 48 576 NEAS Consultation 4 Hrs 48 192 Site Investigation 1 Sum 11,000 11,000 Outline design 1 Sum 10,000 10,000 Funding Agreement 74 Hrs 70 6,000 Produce Documents for PAR / Form G 75 Hrs 48 3,600 PAB meeting 12 Hrs 48 576 PM Costs 100 Hrs 48 4,800

Tender Preparation Draft tender docs 111 hrs 60 6,660 Review Tender Docs 28 hrs 60 1,680 Draft Contract 21 hrs 60 1,260 Risk 10% 4,658 Sub Total 53,242


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4 Preliminary Programme A 2010 programme has been reviewed with significant alterations being made. Some of these were to include for a Design and Build approach which has reduced the total duration of the scheme to 18 months, subject to planning and funding approval. The construction period has been amended to include for temporary works and dewatering which were not previously allowed for. The programme is based on indicative outputs providing opportunities to reduce the critical path through value engineering or off-site construction techniques which will be identified as the construction phase plan is developed. It should be noted that the advised lead time of 30 weeks for delivery of the pumps is the key driver for the construction completion date. An assumption has therefore been made that the pumps will be specified, approved and ordered within four weeks of the commencement of the detailed design phase. Reducing the duration for pump procurement would be key to offering greater overall flexibility of the construction plan. The programme assumes that the scheme can go out to D&B tender whilst a funding agreement is sought. Please note that approval for a temporary footway closure has been included within the programme however to ensure minimal disruption to local landowners it was thought prudent to include a sum in the budget for a segregating fence which would allow the access track and footpath to function in parallel, within a diversion, if permission for a temporary closure is refused. Northstowe Pumping Station Programme Summary

NORTHSTOWE PUMPING STATION Start Finish Business Case Development 01/03/2013 29/08/2013 Project Assessment Board Review - GW1 29/08/2013 29/08/2013 Tender Documentation Preparation 19/07/2013 07/08/2013 Tender Period D&B 08/08/2013 04/09/2013 Tender Evaluation & Negotiation Period 05/09/2013 02/10/2013 Award D&B Contract 03/10/2013 09/10/2013 Detailed Contractor Design Commence 10/10/2013 15/01/2014 Place Pump Order 08/11/2013 08/11/2013 Site Establishment & De-Watering 03/12/2013 05/02/2014 Construction Period 06/02/2014 04/08/2014 Defects Period 05/08/2014 04/08/2016

A Full Programme Is Included in Appendix 2

5 Whole Life Cost


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A Whole Life Cost review has been undertaken by Hannah-Reed & Associates in December 2012. A number of assumptions have been made to calculate the Present Value of the 100 year maintenance costs. The assumptions on the maintenance and refurbishment are in line with those used on similar Pumping Station schemes that have been used to benchmark the construction and whole life costs. The forecast replacement costs also are consistent with benchmark data based on pumps supplied with a 25 year design life and the duty / assist configuration. Once the allowance for refurbishment and maintenance has been factored in the capital replacement schedule is commensurate with that which would be expected for similar schemes. A summary of the review is shown below which indicates that the total cash expenditure budget over 100 years for running costs, including electricity supply, is forecast at Circa £1.7m. The Present Value of these costs has been calculated at £474,061 using the rates shown below. (see Appendix 1) This figure is the cash sum required today to meet the forecasted £1.7m commitment over the next 100 years. Capital Refurbishment & Replacement Costs

Item Cost

(cash) Interval (yrs)

Refurbishment Pumps 12,000 10 Flap Valves 1,000 10 Weed rake 25,000 30 Building 3000 10 Wet Well 5000 30 Replace Pumps 60,000 30 Flap Valves 5,000 30 Panel 35,000 30

Table 2 Maintenance Costs

M&E £3,000.00 Civils £2,000.00 Total £5,000.00 per annum Electricity Costs

Total Unit cost £2,200.51 Base unit cost £1,071.75 Av Charge £2,786.40 Standing Charges £1,306.70 Total £7,365.36 per annum


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APPENDIX 1 – WLC TableHannah Reed - Northstowe Dec-12 Assessment of Operation & Maintenance Costs Year 0 30 75 Discount rate 3.50% 3.00% 2.50% TOTALS: £ 495,000 500,000 736,500 1,731,500 474,061 Year Discount Capital Maint. Elec Cash PV

0 1 0 5,000 7,365 12,365 12,365 1 0.966 0 5,000 7,365 12,365 11,947 2 0.934 0 5,000 7,365 12,365 11,543 3 0.902 0 5,000 7,365 12,365 11,153 4 0.871 0 5,000 7,365 12,365 10,776 5 0.842 0 5,000 7,365 12,365 10,411 6 0.814 0 5,000 7,365 12,365 10,059 7 0.786 0 5,000 7,365 12,365 9,719 8 0.759 0 5,000 7,365 12,365 9,390 9 0.734 0 5,000 7,365 12,365 9,073

10 0.709 16,000 5,000 7,365 28,365 20,109 11 0.685 0 5,000 7,365 12,365 8,470 12 0.662 0 5,000 7,365 12,365 8,183 13 0.639 0 5,000 7,365 12,365 7,906 14 0.618 0 5,000 7,365 12,365 7,639 15 0.597 0 5,000 7,365 12,365 7,381 16 0.577 0 5,000 7,365 12,365 7,131 17 0.557 0 5,000 7,365 12,365 6,890 18 0.538 0 5,000 7,365 12,365 6,657 19 0.52 0 5,000 7,365 12,365 6,432 20 0.503 16,000 5,000 7,365 28,365 14,255 21 0.486 0 5,000 7,365 12,365 6,004 22 0.469 0 5,000 7,365 12,365 5,801 23 0.453 0 5,000 7,365 12,365 5,605 24 0.438 0 5,000 7,365 12,365 5,415 25 0.423 0 5,000 7,365 12,365 5,232 26 0.409 0 5,000 7,365 12,365 5,055 27 0.395 0 5,000 7,365 12,365 4,884 28 0.382 0 5,000 7,365 12,365 4,719 29 0.369 0 5,000 7,365 12,365 4,560 30 0.356 133,000 5,000 7,365 145,365 51,791 31 0.346 0 5,000 7,365 12,365 4,277 32 0.336 0 5,000 7,365 12,365 4,153 33 0.326 0 5,000 7,365 12,365 4,032 34 0.317 0 5,000 7,365 12,365 3,914 35 0.307 0 5,000 7,365 12,365 3,800 36 0.298 0 5,000 7,365 12,365 3,690 37 0.29 0 5,000 7,365 12,365 3,582 38 0.281 0 5,000 7,365 12,365 3,478 39 0.273 0 5,000 7,365 12,365 3,376 40 0.265 16,000 5,000 7,365 28,365 7,520 41 0.257 0 5,000 7,365 12,365 3,183 42 0.25 0 5,000 7,365 12,365 3,090 43 0.243 0 5,000 7,365 12,365 3,000 44 0.236 0 5,000 7,365 12,365 2,913 45 0.229 0 5,000 7,365 12,365 2,828


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TOTALS: £ 495,000 500,000 736,500 1,731,500 474,061 Year Discount Capital Maint. Elec Cash PV

46 0.222 0 5,000 7,365 12,365 2,745 47 0.216 0 5,000 7,365 12,365 2,665 48 0.209 0 5,000 7,365 12,365 2,588 49 0.203 0 5,000 7,365 12,365 2,512 50 0.197 16,000 5,000 7,365 28,365 5,595 51 0.192 0 5,000 7,365 12,365 2,368 52 0.186 0 5,000 7,365 12,365 2,299 53 0.181 0 5,000 7,365 12,365 2,232 54 0.175 0 5,000 7,365 12,365 2,167 55 0.17 0 5,000 7,365 12,365 2,104 56 0.165 0 5,000 7,365 12,365 2,043 57 0.16 0 5,000 7,365 12,365 1,983 58 0.156 0 5,000 7,365 12,365 1,926 59 0.151 0 5,000 7,365 12,365 1,869 60 0.147 133,000 5,000 7,365 145,365 21,337 61 0.143 0 5,000 7,365 12,365 1,762 62 0.138 0 5,000 7,365 12,365 1,711 63 0.134 0 5,000 7,365 12,365 1,661 64 0.13 0 5,000 7,365 12,365 1,613 65 0.127 0 5,000 7,365 12,365 1,566 66 0.123 0 5,000 7,365 12,365 1,520 67 0.119 0 5,000 7,365 12,365 1,476 68 0.116 0 5,000 7,365 12,365 1,433 69 0.112 0 5,000 7,365 12,365 1,391 70 0.109 16,000 5,000 7,365 28,365 3,098 71 0.106 0 5,000 7,365 12,365 1,311 72 0.103 0 5,000 7,365 12,365 1,273 73 0.1 0 5,000 7,365 12,365 1,236 74 0.097 0 5,000 7,365 12,365 1,200 75 0.094 0 5,000 7,365 12,365 1,165 76 0.092 0 5,000 7,365 12,365 1,137 77 0.09 0 5,000 7,365 12,365 1,109 78 0.087 0 5,000 7,365 12,365 1,082 79 0.085 0 5,000 7,365 12,365 1,055 80 0.083 16,000 5,000 7,365 28,365 2,362 81 0.081 0 5,000 7,365 12,365 1,005 82 0.079 0 5,000 7,365 12,365 980 83 0.077 0 5,000 7,365 12,365 956 84 0.075 0 5,000 7,365 12,365 933 85 0.074 0 5,000 7,365 12,365 910 86 0.072 0 5,000 7,365 12,365 888 87 0.07 0 5,000 7,365 12,365 866 88 0.068 0 5,000 7,365 12,365 845 89 0.067 0 5,000 7,365 12,365 824 90 0.065 133,000 5,000 7,365 145,365 9,456 91 0.063 0 5,000 7,365 12,365 785 92 0.062 0 5,000 7,365 12,365 766 93 0.06 0 5,000 7,365 12,365 747 94 0.059 0 5,000 7,365 12,365 729 95 0.057 0 5,000 7,365 12,365 711 96 0.056 0 5,000 7,365 12,365 694 97 0.055 0 5,000 7,365 12,365 677 98 0.053 0 5,000 7,365 12,365 660 99 0.052 0 5,000 7,365 12,365 644


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APPENDIX 2 – Preliminary Programme