Street Light Survey for
LV Electric Feeder Location
The works are to undertake a Radio Frequency underground utility survey within a predefined survey area to locate the feeds to street lights in order to isolate same for maintenance purposes.
Scope of Works
The technical requirements of the utility location survey brief are to locate all the supplies to the numbered street lights shown on the image below:
Control and Data Processing
Existing topographic control stations were used to survey the traced and marked locations of the cables using a Leica total station. The surveyed data was processed using N4ce software and the final product edited and completed using BricsCAD software. No post processing of GPR data was undertaken on this site.
Utility Location Survey Summary
The main objective of the survey was to locate the low voltage (LV) electric feeds to street lights 3, 4, 12 & 15. We traced the cables back to the substation on site. To confirm this was the case, we investigated further street lights on site and found that they all went back to the same location.
We acquired the SSE asset plans prior to attending site and when we compared our findings to the records it is very similar to the location they believe their assets to be. We also investigated street lights 18 & 19 as the SSE plans show that the low voltage supply near these was from a different substation. Once we located the supplies to these we found that these were also going back to the different substation on the SSE asset plans.
Final Presentation / Deliverables
The utility survey results have been picked up on site using total station and positioned over an OS Tile.
All utility information shown on final drawing and model is digitised from Electro-Magnetic Location (EML) data to produce an ‘overview’ of the LV network of street light supplies. Although the location accuracy, position and depth will be very high, it does not, in all cases, include utility information such as ownership, service type, pipe materials, duct formation, numbers, etc.
Should there be any intrusive works planned, a PAS128 Type-A (Verification) survey would be recommended to confirm the exact location of services.