# Microsoft Three Mile Island Energy Supply > Proposed: a 835 MW data center in Dauphin County, Pennsylvania, from the Kapwork Grow tracker (1 source). Sources and dates on every fact. Page: https://kapwork.com/grow/directory/datacenters/microsoft-three-mile-island-energy-supply-pa-dc_30229d30464f Markdown: https://kapwork.com/grow/directory/datacenters/microsoft-three-mile-island-energy-supply-pa-dc_30229d30464f.md Updated: Nov 3, 2026 Publisher: Kapwork Grow, a free directory of public records Constellation Energy has proposed a 835 MW data center in Dauphin County, Pennsylvania (proposed). One source reports this facility in the Kapwork Grow tracker. (Kapwork Grow tracker record, merged from the sources listed here, Server Country project record (CC BY 4.0), as of Nov 2, 2026) ## Facts - **Operator:** Constellation Energy (Server Country project record (CC BY 4.0), as of Sep 24, 2026) - **Tenants:** Microsoft (Kapwork Grow tracker record, merged from the sources listed here, as of Nov 2, 2026) - **Stage:** Proposed (Server Country project record (CC BY 4.0), as of Sep 24, 2026) - **Reported capacity:** 835 MW (Server Country project record (CC BY 4.0), as of Sep 24, 2026) - **Reported investment:** $1.60B (Kapwork Grow tracker record, merged from the sources listed here, as of Nov 2, 2026) - **Reported jobs:** 627 (Kapwork Grow tracker record, merged from the sources listed here, as of Nov 2, 2026) - **Announced:** Sep 20, 2024 (Server Country project record (CC BY 4.0), as of Sep 24, 2026) - **Construction start reported:** 2025 (Server Country project record (CC BY 4.0), as of Sep 24, 2026) - **Expected completion:** 2028 (Server Country project record (CC BY 4.0), as of Sep 24, 2026) - **City:** Londonderry Township (Server Country project record (CC BY 4.0), as of Sep 24, 2026) - **County:** Dauphin County (Server Country project record (CC BY 4.0), as of Sep 24, 2026) - **State:** Pennsylvania (Server Country project record (CC BY 4.0), as of Sep 24, 2026) - **AI workload:** AI or machine-learning workload reported (Kapwork Grow tracker record, merged from the sources listed here, as of Nov 2, 2026) - **Facility type:** AI data center (Kapwork Grow tracker record, merged from the sources listed here, as of Nov 2, 2026) - **Incentives reported:** Other; $1.00B (Kapwork Grow tracker record, merged from the sources listed here, as of Nov 2, 2026) ## What each source reports | Dataset | Reported name | Reported status | Reported MW | | --- | --- | --- | --- | | Server Country | Microsoft Three Mile Island Energy Supply | Proposed | 835 MW | ## Questions this page answers ### Is Microsoft Three Mile Island Energy Supply under construction? No permit record shows it yet, so this page prints it as announced. Server Country (Sep 24, 2026) reports it as proposed. ### Who is building Microsoft Three Mile Island Energy Supply? Constellation Energy is the operator; the tenants reported are Microsoft. No public record names the general contractor yet. It shows here the day one does. ### When is Microsoft Three Mile Island Energy Supply expected to finish? Server Country reports expected completion in 2028. That is a reported target, not a schedule. ### Which carriers serve Microsoft Three Mile Island Energy Supply? No public record names them yet. They show here when a filing does. ### How do contractors on Microsoft Three Mile Island Energy Supply get paid sooner? The owner pays the general contractor, and the general contractor pays its subcontractors. Once your customer approves your invoice, certify it with Kapwork. Funders compete to fund it, so you don't wait for the payment date. Free for businesses. Kapwork doesn't lend and doesn't contact your customer. ## Latest updates - [Expected completion reported](https://servercountry.org/data/projects/). Reported for 2028. - [Construction start reported](https://servercountry.org/data/projects/). Reported for 2025. - **Sep 20, 2024:** [Reported as announced](https://servercountry.org/data/projects/) ## Related records - [1205 Commonwealth Dr. Data Center (former Pennhurst Asylum)](https://kapwork.com/grow/directory/datacenters/1205-commonwealth-dr-data-center-former-pennhurst-asylum-pa-dc_97391eba28e7): Same state - [2100 Renaissance Blvd. Data Center (MLP Ventures)](https://kapwork.com/grow/directory/datacenters/2100-renaissance-blvd-data-center-mlp-ventures-pa-dc_a7efcf37c434): Same state - [216 Greenfield Road (Chirisa Technology Parks)](https://kapwork.com/grow/directory/datacenters/216-greenfield-road-chirisa-technology-parks-pa-dc_e9e7b77092ab): Same state - [2201, 2301, 2501, 2701, & 2901 Renaissance Blvd. Data Center (MLP Ventures)](https://kapwork.com/grow/directory/datacenters/2201-2301-2501-2701-2901-renaissance-blvd-data-center-mlp-ventures-pa-dc_fce0abb1e641): Same state - [3200 Horizon Dr. Data Center (MLP Ventures)](https://kapwork.com/grow/directory/datacenters/3200-horizon-dr-data-center-mlp-ventures-pa-dc_0ce2f7a2c597): Same state ## What this record does not show - This record is the Kapwork Grow tracker's merged view of a facility, from the tracker snapshot built 2026-11-02. Facts tagged KW are the tracker's resolved values; the per-source rows it was merged from are listed under Sources and on the tracker record. - Sources on this record: Server Country, https://servercountry.org/data/ (CC BY 4.0). Every source is licensed for commercial use with attribution. - An announced or permitted build is not a contract, an open bid or a purchase order. - Capacity figures are as reported by the cited sources and may describe planned rather than energised capacity. ## Sources - [Server Country project record (CC BY 4.0)](https://servercountry.org/data/projects/) · as of Sep 24, 2026 · record 0434 - [Kapwork Grow tracker record, merged from the sources listed here](https://kapwork.com/app/grow/datacenters/projects/microsoft-three-mile-island-energy-supply-pa) · as of Nov 2, 2026 · record 52925224207951 ## Have an invoice your customer approved? Certify your approved invoices. Funders compete to fund them. Multiple offers. No notice of assignment. Free for businesses. - [Get offers](https://kapwork.com/app/register-originator?mode=express&flow=invoice_registration&source=growth_suite&intent=certify&return_to=%2Fapp%2Finvoices%2Fnew&entry_point=certify_public_directory) - [Talk to an expert](https://meetings.hubspot.com/kylemase/kapwork-intro-with-kyle-mauricio) ## Cite this page Kapwork Grow, "Microsoft Three Mile Island Energy Supply", https://kapwork.com/grow/directory/datacenters/microsoft-three-mile-island-energy-supply-pa-dc_30229d30464f, materially updated Nov 3, 2026.