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Over 20 years of experience

Our Services

The Very Best In Engineering Services

Highway Design

We offer an in-house Highway design service, tailored to meet our clients needs. Whether you require an access design for a small development or a full Section 38/278 design package for your project, we can help you.

Drainage Design

Our engineering team boasts a combined experience of over 20 years in design Sustainable Drainage Systems (SuDS) across the county and drainage projects internationally.

Satisfied Clients

Over the Last 14 years JNM Engineering Ltd has worked with hundreds of Clients from individual small house builders to Government Agencies. For a small glimpse of some of our regular clients, check out our Clients List

Our Portfolio

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What our clients say..

"Thank you for your support, as always planning is difficult but we got there in the end!"

"Thanks for a quick turnaround"

"JNM have provided a quick and easy service over the last 3 years of business. We will continue to work together for the foreseeable future.“

Recent Updates

Our Latest News

Sewers For Adoption 8 – The Future Of Drainage Design

Sewers For Adoption 8

What is sewers for adoption 8?

Sewers for adoption sets out standards and provides guidance for developers on the design and construction of sewers and related features that will be adopted by water and waste water companies in England and Wales in accordance with section 104 of the water industry act 1991. Sewers for Adoption 8 currently being worked on by Water UK with the main purpose of setting out the standards for adoptable sustainable drainage systems.

Why is there a pre-implementation version of Sewers for adoption 8?

Water UK are currently working on Sewers for Adoption 8 and it is expected to be implemented in mid 2019. The advance publication of the pre-implementation version is intended to allow sufficient time for changes to policies and procedures to made by water and sewerage companies, planning authorities and developers in order to comply with the new manual. The final approval for adoption code however lies with Ofwat and therefore the guidance included in the implementation version could be subject to change.

Why is SFA8 so significant for SuDs in the UK?

SuDS became an integral part of planning policy back in 2014 but implementation of SuDS has been limited due to issue of the adoption of SuDS by local authorities or water companies. In order to make systems adoptable, design of SuDS has often been compromised leading to many schemes purely being used to manage water without fulfilling the four pillars of SuDs design, outlined by the SuDS manual. Sewers for adoption 8 will allow a route for the adoption of SuDS that allows water quality, amenity and biodiversity as well as water quantity to be properly considered during the design stage allowing it to be fully integrated into the surface water management and urban design process.

What are the key considerations for SuDs design included in SF8?

The new manual will encourage the use of SuDS and their consideration early on in planning to ensure that they are part of the holistic design of the development . Designers will need to ensure that they fully consider installation, health and safety risk assessments, maintenance and access requirements of both hard and soft SuDS as part of their designs.

Our new office…
James Mewis (Director) With Councillor S J Reynolds (Mayor of Telford 2017)

As work loads increase and the team rapidly expands, March 2017 saw the opening of JNM Engineering Ltd’s new office located in Ironbridge, Shropshire, the birthplace of the industrial revolution and home to the first Bridge to be constructed of cast Iron designed by Thomas Farnolls Pritchard in 1773.

The office opening created a great networking event which attracted local media attention and helped raise awareness for local charities.

Private Sewer Transfer…2012

On 1 October 2011 all privately owned sewers and lateral drains which
communicate with (that is drain to) an existing public sewer as at 1 July 2011 will become the responsibility of the sewerage undertaker – normally the water and sewerage company for the area. This includes private sewers
upstream of pumping stations that have yet to transfer and also private
sewers upstream of lengths of sewer or drain that are the subject of an
ongoing appeal or which have been excluded from transfer as a result of an
appeal. The continued efficient operation of such upstream sewers
transferred to a sewerage undertaker will need to be considered in
determining relevant appeals. Sewers and lateral drains which are upstreamof lengths of sewer which are on or under land opted-out of transfer by a Crown body, or which are owned by a railway undertaker (and therefore specifically excluded in the transfer regulations) are also transferred.
Any private sewer which, immediately before 1 July 2011, communicates with a public sewer will transfer. Where development of a site is incomplete, the judgement as to whether sewers will transfer on 1 October will need to be site specific and depend on circumstances. Sewerage undertakers and Developers are advised to consult on partially constructed sites to reach a common understanding as to what is and what is not transferring. This will ensure that an undertaker does not inadvertently trespass by accessing pipes which it had mistakenly assumed had transferred

Flood Risk Assessments…

Flood Risk Assessments

Across the UK, planning requirements differ in England, Wales and Scotland.

Why not check out for dedicated Flood Risk Assessment page for region based information. Alternatively, please contact us for all your Civil Engineering Advice.

Soakaways… (BRE365)

Soakaways are always the preferred method to discharge surface water from a site. Percolation tests must be carried out site in line with BRE Digest 365 to ensure that the ground is suitable for the use of soakaways.

We work with local contractors and can give support during testing to help ensure your tests are carried out correctly.

For free advice or a competitive quote please contact one of our team on 01952 475653

Septic Tanks… 2020

Did You Know…

In 2020 septic tanks will no longer be accepted as a means of discharging foul drainage from your proposed site, alternative methods such as treatment plants will have to be considered.

If you have a septic tank that discharges directly to a surface water you will need to replace or upgrade your treatment system by 1 January 2020. Where properties with septic tanks that discharge directly to surface water are sold before 1 January 2020, responsibility for the replacement or upgrade of the existing treatment system should be addressed between the buyer and seller as a condition of sale.

If the Environment Agency finds evidence that your septic tank discharging to a surface water is causing pollution, you will need to replace or upgrade your system earlier than 1 January 2020. You will usually have to do this within 1 year, although this will be agreed on a case-by-case basis.

You may be able to:

  • connect to mains sewer – where available
  • install a drainage field (also known as an infiltration system) so the septic tank can discharge to ground instead
  • replace your septic tank with a small sewage treatment plant

For more information and free assistance please contact us

Dear all,

In light of the concerns over the COVID 19 outbreak, we wanted to send this courtesy email to our clients to reassure them that should plans be put in place by our Government to follow procedures other countries have followed by enforcing a lockdown, staff at JNM Engineering have been preparing to work from home in this event.

All staff are fully equipped to continue to work to meet client deadlines in the event the office needs to close.

Our phone lines will remain open and a call divert service is already operational to ensure you are able to contact the member of staff working on your matter.

We are closely monitoring the situation and are taking steps to ensure the safety of our staff and clients and therefore have contingency plans in place for video conferencing if necessary.

We are confident that by making a collective effort to remain operational during the hours of 9am-5pm, we will hopefully reduce as much as possible the effects of this unprecedented challenge.

Wishing you all good health.