Award

Dawdon Short Sea Outfall Repair Works

THE COAL AUTHORITY

This public procurement record has 2 releases in its history.

Award

29 Dec 2022 at 14:46

Award Notice
Tender

25 Mar 2022 at 11:04

Tender Notice
Summary of the contracting process

The Coal Authority is inviting tenders for the "Dawdon Short Sea Outfall Repair Works" project, which involves refurbishing an existing sea outfall structure located in County Durham. The project falls under the industry category of "Underwater pipeline" and has a total contract value of £300,000 GBP. The tender deadline is set for 6th May 2022 with a contract period starting on 1st August 2022 and ending on 31st October 2022. The procurement method is an open procedure, providing opportunities for small and medium-sized enterprises (SMEs) to compete for this works contract.

This tender presents a growth opportunity for businesses specialising in underwater pipeline construction and maintenance. Companies with expertise in subsea pipelines, piping, and general construction work for pipelines would be well-suited to participate. The project requires quality control measures and adherence to design specifications, making it suitable for contractors with experience in similar engineering and construction projects. The location of the project in County Durham provides a regional business growth opportunity for interested contractors.

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Notice Information

Notice Title

Dawdon Short Sea Outfall Repair Works

Notice Description

The Coal Authority is looking for a specialist contractor to undertake the refurbishment of existing sea outfall structure at Dawdon Mine Water Treatment Scheme, located approximately 1km south of Dawdon, County Durham. The works will be undertaken in accordance with the NEC4 Engineering and Construction Contract Option B Priced Contract with Bill of Quantities and further details can be found at www.neccontract.com. For further details and full description of the works, please see VI.3 Additional information of this notice for a more detailed description of the works. Here you will find the Scope and instructions on how to register for the event and gain access to the full tender documentation. Additional information: The Dawdon short sea outfall consists of two parallel 200mm pipes with a gravity flow approximately 350m to the discharge point 140m metres from the shore. The pipes were installed through directional drilling and emerge from under the sea bed at the discharge point. Each pipe comes to a T piece with duck bill diffuser elements fitted to each end of the T section. The base of the discharge arrangement was not sufficiently supported and this has allowed the pipework to rotate impacting discharge flows. This needs to be repaired and returned to the correct position with improvements to the support of the diffusers from a pre cast concrete base. The diffusers also had a protective structure that has been dislodged and this needs to be replaced by a new protective sleeve and cap. The protective sleeve can either be a pre-cast concrete pipe or an HDPE pipe section which will be capped by a pre-cast concrete or GRP lid. The replacement duckbills will have to be fitted after the sleeve is placed. Alternatively, arch shaped cut-outs could be implemented, to fit over the duckbills. The "duckbill" check valves will protrude slightly through holes/ windows prepared for purpose and will discharge normally. Construction Due to operational requirements shut down of the pipelines must be well planned and durations kept to a minimum. Based on our feasibility studies the shutdowns are estimated to be no longer than 3 hours per pipeline. All the rehabilitation operations that require no flow through the pipe must be programmed to take place at the same time so that only one shut-down period is required. The following tasks will need to be completed under shutdown: * Disconnection of the flange adapter and replace. * Align the diffuser to vertical and temporarily secure. * Remove the diffuser Tideflex Check Valves. * Drop the protection sleeve into position. * Replacing the diffuser Tideflex Check Valves Divers to conduct the following site preparation activities. * Clearing loose rubble around the flange adapter and concrete base footprint. * Rock drilling may be required to level concrete base footprint. After Pipeline Shutdown * Replace/ rehabilitate and install: * Blank flange o Sacrificial break away spool piece (optional) * Flange Adapter - and right the diffuser to vertical alignment. * Remove the diffuser Tideflex Check Valves. * Place and secure precast concrete base * Drop the protection sleeve into position. * Replace the diffuser Tideflex Check Valves After Resume Pipeline Flow * Grout fill around flange adapter. * Place and secure protective sleeve cap. * A marker buoy with independent anchorage is also to be installed. Evidence of quality control measures and that the installation is as per design are required.

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-b5fd17-c3c71668-0c85-42e1-b5da-9a9f088094c5
Publication Source
Contracts Finder
Latest Notice
https://www.contractsfinder.service.gov.uk/Notice/a1938dd3-52f6-492e-922f-ae849aea5e8c
Current Stage
Award
All Stages
Tender, Award

Procurement Classification

Notice Type
Award Notice
Procurement Type
Standard
Procurement Category
Works
Procurement Method
Open
Procurement Method Details
Open procedure (above threshold)
Tender Suitability
SME
Awardee Scale
SME

Common Procurement Vocabulary (CPV)

CPV Divisions

44 - Construction structures and materials; auxiliary products to construction (except electric apparatus)

45 - Construction work

CPV Codes

44161400 - Underwater pipeline

44161410 - Subsea pipelines

44162000 - Piping

45231100 - General construction work for pipelines

Notice Value(s)

Tender Value
£300,000 £100K-£500K
Lots Value
Not specified
Awards Value
£797,315 £500K-£1M
Contracts Value
Not specified

Notice Dates

Publication Date
29 Dec 20223 years ago
Submission Deadline
6 May 2022Expired
Future Notice Date
Not specified
Award Date
7 Aug 20223 years ago
Contract Period
7 Aug 2022 - 31 Aug 2023 1-2 years
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Not Specified
Awards Status
Active
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
THE COAL AUTHORITY
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
MANSFIELD
Postcode
NG18 4RG
Post Town
Nottingham
Country
England
Major Region (ITL 1)
TLF East Midlands (England)
Basic Region (ITL 2)
TLF1 Derbyshire and Nottinghamshire
Small Region (ITL 3)
TLF15 North Nottinghamshire
Delivery Location
Not specified
Local Authority
Mansfield
Electoral Ward
Berry Hill
Westminster Constituency
Mansfield

Supplier Information

Number of Suppliers
1
Supplier Name

SOUTHBAY CIVIL ENGINEERING

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts. 

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