PORTSOY IMPROVED DISPOSAL SCHEME
Gravity sewers, pumping chamber, pumping main, screening station, foul and stormwater outfalls.
Client – North of Scotland Water Authority
Completion – 1999
Value – £0.95m
AREAS OF RESPONSIBILITY
Hydrographic, land survey, and underwater inspection – Hydraulic modelling and detailed design – Statutory consultation – Contract documentation
- Screening Station – 550 l/s
- Gravity Sewers (600 675mm dia.) – 450m
- Outfalls (300 675m dia.) – 300m
Selection of optimum location for outfalls on exposed rocky foreshore by use of hydrographic survey and underwater inspection expertise. Design of 20m long steel carrier tube to allow rapid and economic installation of end of 300 dia foul sewer to 3m C.D. Use of profiled formwork to fit underwater contours. The design allows flows from 9 l/s to 550 l/s to discharge by gravity.
Civil Contractor – W. M. Donald Ltd
M & E Contractor – Europump Ltd