Directors Project Expeience Prior To RES Design Services Ltd

The Trams to Newhaven project aimed to extend the existing Edinburgh tram infrastructure from York Place to Newhaven, effectively completing the initial scope of works initiated in 2007. The proposed trams infrastructure included a 4.7km track in both directions and the incorporation of 8 new tram stops. Construction of this new infrastructure within the city centre necessitated extensive utility diversion works, a responsibility entrusted to Morrison Utility Services under the "Swept Path" contract. Aidan Harrison served as the Design Lead & Senior Civil Engineer for the water & wastewater service diversions

The Mansfield Flood Resilience project is geared towards mitigating the risk of surface water flooding in the town of Mansfield through the implementation of Sustainable Drainage Solutions (SuDS). In the outline design phase, four interventions were identified for retrofitting across the town, contingent upon site constraints. These interventions encompass permeable paving, street/verge raingardens, bioswales, and detention basins.

Aidan Harrison played a pivotal role in the project, leading the design team and enhancing both the quality and efficiency of project outputs.

The LWWP represented a groundbreaking and comprehensive approach to the provision of drainage and wastewater infrastructure in Belfast. The project aimed at achieving three core objectives: protection against flooding, environmental enhancement, and economic growth. The holistic and integrated methodology sought to manage water flow throughout the catchment, from its source to the sea.

In this initiative, Aidan Harrison assumed the role of Civil Engineer for the Combined Sewer Overflows (CSO), addressing issues related to Unsatisfactory Intermittent Discharges (UID). 

The Dunbar Wastewater Treatment Works (WwTW) operated as a Membrane Bioreactor (MBR) facility designed to treat a Population Equivalent (PE) of 30,000. However, the treatment works faced compliance challenges with its Controlled Activities License (CAR) issued by the Scottish Environment Protection Agency (SEPA) for the Flow to Full Treatment (FFT), primarily due to hydraulic constraints. The facility's capacity to treat 70 litres per second fell short of the required 100 litres per second. Moreover, a forecasted increase in the PE to 36,267 further exacerbated the demand, necessitating an FFT requirement of 118 litres per second.

Aidan Harrison was the Design Lead for the project during the "Integrated Wedge" phase, wherein the preferred option was anticipated to be refined into an outline design for handover to the prepare team for detailed design work. 

The Big Higham Distribution Service Reservoir (DSR) project was initiated by STW in response to the aging state of the asset, constructed in 1956, which exhibited signs of water ingress. Additionally, the network lacked resilience, and the DSR could not be isolated for an extended period. The project's primary objective was to explore options to address these identified issues.

In this project, Aidan Harrison assumed the role of design lead & Senior Civil Engineer for the multi-disciplinary team, which included civil engineers, mechanical engineers, hydraulic modellers, electrical engineers, process engineers, and quantity surveyors. Following subsequent hydraulic modelling investigations, four of these options were deemed viable.

Aidan then advanced with the four viable options, creating carbon estimates (embodied and operational), construction cost estimates, and outlining the advantages and disadvantages of each solution.

CWA, a collaboration between AECOM and Morrison Utility Services, secured its position as the preferred bidder in 2014 to contribute to the delivery of Scottish Water's potable water infrastructure as part of its capital investment program. The scope of CWA's work spanned diverse projects, encompassing the design and construction of various potable water infrastructure elements, ranging from large-diameter strategic trunk mains to enhance network resilience, "Main Out" trunk mains from proposed or existing Water Treatment Works (WTW), Distribution Service Reservoirs (DSR), to small-diameter network designs for capital maintenance and rehabilitation works.

Aidan Harrison joined CWA early in his career, recognizing it as an exceptional opportunity to advance and gain a broad spectrum of experience.