Topographical surveys of watercourses, adjacent lands and property thresholds of residential and commercial premises were collected in Glenties in January and February 2021. These works captured the data needed to build the hydraulic computer model of the Scheme Area. The model simulated flow scenarios in detail to define flood extents and depths. Model outputs were used to identify properties at risk from flooding and informed the options for measures needed to protect them.
Murphy Geospatial carried out survey works in Glenties on the following:
- 5th – 14th January 2021: River Channel Survey (Stracashel, Owenea Rivers and Gortnamucklagh);
- 8th – 10th February 2021: Land and Property Threshold Survey.
A Chartered Environmental Scientist accompanied the surveyors during river surveys to ensure freshwater pearl mussel populations in the Owenea River are avoided. The map provided indicates the overall survey area and the location of property threshold surveys.
Murphy Geospatial recorded levels at the lowest point on the property which may be susceptible to flood risk, the threshold level. Generally, this is the front door of the property and can be recorded from the public road. However, in some cases, if the lowest point is at the rear of the property, or if there is a shed or secondary building on the property, an additional threshold level may need to be recorded which may not be visible from the public road.
Donegal County Council has obtained necessary safety and bio-security statements from the surveyors demonstrating their protocols and procedures, particularly in relation to Covid 19 and biodiversity.
Donegal County Council thank the public in advance for their co-operation which will greatly inform how flood risk in Glenties should be managed