Flood Awareness

Posters re: flood risk levels for your information:

Please see below for a sample flood plan is below, which you can adapt for your household’s needs.

Useful advice on what to do in the event of a flood:

https://www.denbighshire.gov.uk/en/emergencies/floods.aspx

https://naturalresources.wales/flooding/what-to-do-in-a-flood/?lang=en

River Levels Gauge

The City Council raised concerns about the A55 river levels gauge which is no longer working. We received the following response from NRW………………..

As you rightly mentioned, residents are familiar with the meanings of river levels at the A55 site, so hopefully the below table will help them understand local river levels now that they are using a different monitoring station. I have only included river levels above 3m, as this is around when the river starts to approach St Asaph Flood Alert/Warning levels, and the conversion below this point is a little bit more complicated.

The Spring Gardens bridge river level station was introduced in 2021 to be used to monitor river levels and issue Flood Warnings, and to eventually replace the A55 site. Since this time, the St Asaph (A55) site has been used as a failsafe while we collected verification data and determined the correlations between the upstream and downstream sites. The Flood Warnings you receive (River Elwy at Lower Denbigh Road and River Elwy at St Asaph) use observed conditions at Pont y Gwyddel and modelled conditions Spring Gardens.

As the Spring Gardens Bridge site displays river levels in mAOD (meters above Ordnance Datum), I’ve also included a conversion to river level in meters for information in case this makes it easier for residents to visualise.

Elwy at St Asaph (A55) level (m)	Spring Gardens Bridge level (m)	Spring Gardens Bridge level  (mAOD)
3	2.54	11.33
3.2	2.72	11.51
3.4	2.9	11.69
3.6	3.08	11.87
3.8	3.26	12.05
4	3.44	12.23
4.2	3.62	12.41
4.4	3.8	12.59
4.6	3.98	12.77
4.8	4.16	12.95
5	4.34	13.13

Useful websites:

https://www.denbighshire.gov.uk/en/emergencies/emergencies.aspx

https://flood-warning.naturalresources.wales/

Meeting with NRW

Flood Investigation Report

Flood Group Meetings

Report from Steve Morris

This morning (4th December) I attended the first (virtual) meeting of the reformed Flood & Community Emergency Action group.

This group has been formed by the City Council to highlight issues of concern regarding flooding to the relevant authorities.

As a result of discussions in the meeting we have decided to prioritise the following issues:

• pinch points/areas where the river overtopped the defences in February;
• the suitability and design of the culvert beneath Lower Denbigh Road;
• capacity of the surface water holding tank beneath the Bowling Green car park and what could be done to relieve the back pressure on the drains.

The group will be making contact with the relevant authorities responsible for each of these so that residents’ concerns can be highlighted and to find out what, if anything, can be done to avoid future problems.

Along with these three main issues, we also discussed the cleaning of culverts and the new NRW river level app.

The next meeting will be held before the end of December and any progress will be fed back to the community. If anyone has anything they would like to raise with the group, please feel free to post on the Facebook Group website https://www.facebook.com/groups/469294483255384/

or e-mail Jill Ellison, City Clerk on: clerk@stasaphcitycouncil.gov.uk