Data centre · Fingal · 53.4149, -6.3801

Amazon (AWS) Cruiserath

operating Amazon (AWS) Our classification · status

77 MW

Average grid draw, 2025

up to ≈8.8% of the CSO data-centre total (upper bound)

220 MW

Stated maximum demand

planning documents · a ceiling, not use

433 MWth

On-site generation licensed

backup-diesel

4.2 ha

Building footprint mapped

3 buildings · OSM

€1.9m

Estimated rates a year

NAV €10.3m

2020

First completion certificate

Grid connection. Staged (connection agreement since 2017, revised into eight annual ramps 2022-2029). "The revised connection agreement provides for eight incremental ramps (increases) in power supply to the site commencing in 2022 and completing in 2029." (ACP 318180 inspector report, p.43)

Why we say it's operating

EPA P1182: on-site generators licensed and in use (Licensable Activity Commenced)
Valuation list: property 10030754 rated as DATA CENTRE
Valuation list: property 5023432 rated as DATA CENTRE
Planning FW17A/0025: completion certificate 2020-09-04
Planning FW19A/0087: completion certificate 2024-04-24
Planning FW20A/0164: completion certificate 2021-05-31

What's next on this site

under construction: Planning FW22A/0308: commencement notice 2026-07-10, no completion certificate

Who runs it

EPA licensee 'Amazon Data Services Ireland Limited' -> Amazon (AWS) (operator; high-confidence entity link from EPA)
OSM operator tag 'Amazon Web Services'
lifecycle: commencement notice names DUB 108 (Amazon naming); inferred
lifecycle: commencement notices name ADSIL Cruiserath
some records attributed by co-location only (no operator in their own source)

Leaflet © OpenStreetMap contributors

Generators and power

EPA licence	Status	Role	MWth	Plant	Permitted hours
P1182	Licensed · Licensable Activity Commenced	backup-diesel	432.72	66 x 6.49 MWth diesel standby + 2 x 2.19 MWth (plus 2 x 0.52 MWth fire pumps); review application P1182-02 would take the site to c. 709 MWth	72 h/yr at 90% load; <=393.78 MWth simultaneously

What the annual environmental reports say

Year	Licence	Grid MW avg	On-site fuel GJ	Full-load hours
2023*	P1182	27.8	3,538	2.3
2024	P1182	60.4	6,467	4.2
2025	P1182	76.6	6,668	4.3

* part year. Full-load hours = fuel burned ÷ the whole fleet at full load, a derived figure.

What the planning and licence documents say

Full ADSIL Cruiserath installation: existing Buildings A, B, C (operating) plus extension Buildings E, F, G (ACP 318180 granted; EPA licence review P1182-02).

Spec	Value	Quote and source
Electrical demand	219.7 MW	"The application states that the entire masterplan site would have a total energy demand of 219.7 MW." ACP 318180 inspector report, p.68 Full masterplan (A,B,C + E,F,G); consistent with 1,924,572 MWh/yr max electricity in EPA NTS (p19).
Grid voltage	220 kV	"The power requirements for the Installation are provided via a direct connection the 220 kV Gas Insulated Switchgear (GIS) Substation Compound (known as Cruiserath)" EPA P1182-02: Attachment-1-2-Non Technical Summary_28.pdf, p.13
Connection point	Cruiserath 220 kV GIS substation (ESB-owned, on site)	"An Electrical Gas Insulated Switchgear (GIS) 220 kV substation (named ‘Cruiserath’), owned and operated by ESB, is located within the existing Installation Site." EPA P1182-02: Attachment-1-2-Non Technical Summary_28.pdf, p.11
Connection terms	staged (connection agreement since 2017, revised into eight annual ramps 2022-2029)	"The revised connection agreement provides for eight incremental ramps (increases) in power supply to the site commencing in 2022 and completing in 2029." ACP 318180 inspector report, p.43 Firmness (firm/non-firm) not stated; ramped agreement.
On-site generation	emergency back-up diesel/HVO generators	"Emergency back-up generators are stationary diesel engine combustion plant installed at the Installation, which supply the primary electrical load to the Installation during emergency operations." EPA P1182-02: Attachment-1-2-Non Technical Summary_28.pdf, p.12
Generating units	107 units	"for the operation of 97 of the 107 generators for 72 hours per year" ACP 318180 inspector report, p.104 Full site A,B,C,E,F,G incl. house/admin generators; excludes 2 fire sprinkler pumps. Licence-review table (EPA P1182-02) gives 66x6.49 + 2x2.19 + 1x3.57 + 36x7.45 + 2x1.84 MWth = 107.
On-site thermal input	709.2 MWth	"The combined thermal input (total capacity) from the emergency generators, once operational, is c. 709.21 MWth." EPA P1182-02: Attachment-4-4-1-Capacity Calculations_27.pdf, p.1 Full build-out incl. extension Buildings E, F, G (and fire pumps).
Fuel	HVO (diesel where HVO unavailable)	"The primary fuel used on site will be Hydrotreated Vegetable Oil (HVO)." EPA P1182-02: Attachment-1-2-Non Technical Summary_28.pdf, p.19
Running hours	72 h/yr per generator	"The operation of each generator is restricted to 72 hours per year at 90% load" EPA P1182-01: Inspectors Report, p.10 Existing licence P1182-01 (Buildings A-C); max 393.78 MWth simultaneously.
Cooling	air-side free cooling with supplementary evaporative (adiabatic) cooling	"Cooling for Building A, B, C, F, and G is provided by evaporative cooling plant that provide conditioned air" EPA P1182-02: Attachment-1-2-Non Technical Summary_28.pdf, p.12
Water	20.6 m3/day (derived)	"Water Usage (Mains) 6,420 m3/year Water Usage (Rainwater Harvesting) 1,110 m3/year" EPA P1182-02: Attachment-1-2-Non Technical Summary_28.pdf, p.19 derived: (6,420 + 1,110) m3/yr / 365 = 20.6 m3/day estimated maximum; NTS also cites average demand 1.2 l/s (p14).
Floor area	108,738 m2 (derived)	"Building B and C) with a gross floor area of c. 21,705sq.m. each (43,410sq. m. in total)" ACP 318180 inspector report, p.14 derived: A 20,739 + B/C 43,410 (p14) + E 1,425 + F/G 2x21,582 (p6) = 108,738 m2. Board order lists F/G at 20,582 each.
Phasing	A, B, C existing; E, F, G extension (E first, then F and G)	"Building E Q2 2027* Building F Q2 2027* Building G Q4 2027*" EPA P1182-02: Attachment-1-2-Non Technical Summary_28.pdf, p.9
Dates	A Q3 2020; B/C Q4 2022; E/F Q2 2027; G Q4 2027 (est.)	"Building A Q3 2020 Building B Q4 2022 Building C Q4 2022 Building E Q2 2027*" EPA P1182-02: Attachment-1-2-Non Technical Summary_28.pdf, p.9
PUE	1.1	"the development would have an annualised design Power Usage Effectiveness (PEU) of 1.12." ACP 318180 inspector report, p.56 Extension Buildings E, F, G (applicant's energy statement).
Heat reuse	designed for future heat recovery; Blanchardstown District Heating System proposed by Fingal CC; ACP condition requires DH connection agreement	"Fingal County Council is currently proposing the Blanchardstown District Heating System (BDHS), which seeks to use low-temperature waste heat from the Installation." EPA P1182-02: Attachment-1-2-Non Technical Summary_28.pdf, p.13
Renewables	CPPA with new Irish renewables required by ACP condition; rooftop PV	"details of a Corporate Purchase Power Agreement that the developer has entered into" ACP 318180 Board order, p.8 ACP 318180 condition; rooftop PV on A, B, C, F, G (EPA NTS p14).

Every value is quoted from the document and page cited; the quote was checked against that page's text. "Derived" means the reader worked it out from stated figures (shown in the quote). Planning and licence figures are design or permitted values, not measured use; values derived from an EPA annual environmental report (AER), mostly water, are reported use for that year. The note under each quote gives the scope and whether a demand figure is a maximum or an average.

Planning history

Received	Ref	What	Decision	Built?
2023-08-03	FW22A/0308	Construction of data centre and associated site works. An Environmental Impact Assessment Report (EIAR) has been submitted to the planning authority with the planning application.	GRANT PERMISSION	commenced (no completion certificate on a main building yet)
2019-05-29	FW19A/0087	• Construction of two data storage facilities with a maximum overall height of c. 22 metres; • Each of the two data storage facilities will accommodate data halls, associated electrical and mechanica	GRANT PERMISSION	completed (completion certificate)
2017-03-01	FW17A/0025	Construction of a data storage facility. An Environmental Impact Statement was lodged with the application. Site bounded by the R121 Cruiserath Road, R121/Church Road and	GRANT PERMISSION	completed (completion certificate)

Appeal 248544 (FW17A/0025) · grant, 2018-01-18 · 35 MW stated

Grid: 110 kV · agreed with EirGrid to supply via existing 110kV connection; EirGrid letter 20/06/17 on 110kV connection and new 220kV substation

Issues: energy demand vs EirGrid forecasts (masterplan = ~33% of 2026 data-centre demand) · climate / ETS · renewables claims (SSE supply) · only 100 m2 of PV · waste heat / district heating

"the proposed development has a power demand of 35MW, and that of the overall masterplan is either 200MW or 205MW" p.57

"it has now been agreed with EirGrid to supply power via the existing 110kV connection." p.36

Appeal 318180 (FW22A/0308) · grant, 2025-12-19 · 73.1 MW stated

Grid: 220 kV · TCA dated 17 June 2017, MIC 240MVA; Building E power now, Building F 2027; predates CRU/21/124

Issues: renewables additionality · CO2 (c.229,855 t/yr at 2025 mix) · HVO credibility · redacted connection agreement · district heating

"Transmission Connection Agreement with EirGrid plc for connection of a facility with a Maximum Import Capacity of 240 MVA at Cruiserath" p.5

"Based on the full power demand of 73.1 MW for the proposed development in 2025" p.116

Sources for this page

osm:way/926894444 · osm:way/1112223803 · osm:way/1112223804 · epa:P1182 · valuation:10030754 · valuation:5023432 · planning:FINGAL/FW17A/0025 · planning:FINGAL/FW19A/0087 · planning:FINGAL/FW22A/0308 · planning:FINGAL/FW20A/0164 · planning:FINGAL/FW21A/0039 · acp:248544 · acp:318180

Joined from OpenStreetMap, the planning register, An Coimisiún Pleanála, EPA licences and annual reports, the Tailte Éireann valuation list and Building Control. Data built 2026-10-10.