Ask HN: Our town faces a 300MW DC proposal. What are the real risks?

5 pointsby rtp4mevor 8 Monaten2 comments

Hey HN,

Our small town was recently approached by a developer with a proposal for a 300 MW Data Center (DC). The site is highly attractive due to existing infrastructure: proximity to a major power source and access to plenty of non-potable water. Additionally, favorable state-level tax incentives (established in 2015) make our region a target for this type of development.

As expected, the proposal has generated significant, vocal pushback from some community members, particularly those near the proposed site. Their public discourse is often based on misinformation or non-contextual talking points (e.g., cooling issues from areas with different water/infrastructure requirements, the rise of AI, etc). With over 20 years in the DC industry, I recognize that while some concerns have validity, many are invalid.

I'm turning to the HN community for solid, quantifiable feedback to help me weigh the genuine benefits and risks of this specific project. My goal is to create a packet of information to help educate our community and town council before project approval/disapproval.

The Facts:

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* Size: 300 MW DC

* Location: About 1 mile from our local Nuclear Power Station and just across the street from the water supply. This is approximately 4.5miles outside the current town center.

* Scale: Town's current peak draw is about 120 MW and the DC needs about 2.5× our existing demand

* Cooling: Evaporative cooling using non-potable water (no competition with drinking water)

* The Claim: Developer $20.7M (US) tax revenue during the construction phase and $13.5M (US) annually in tax returns

* Details: The proposal can be seen here[1]

After doing some personal research, I'm mostly comfortable with the water usage and noise analysis. My core anxiety is the power infrastructure and local utility rates.

My Questions (Seeking Data/Case Studies on similar size/type of DC)

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* Effect of Utility Rates: How will a ~ 250% increase in local demand affect the existing residential and commercial utility contracts? Is it standard for a high-volume industrial client (co-located near the power source) to negotiate an entirely separate, discounted industrial rate that guarantees no rate increase for existing town residents?

* Unforeseen Grid Stress: Beyond the DC itself, what are the other risks this level of sustained demand puts on the regional grid infrastructure (e.g., specific substation upgrades, maintenance costs, or reliability risks) that small towns fail to account for?

* Any other technical details I need to ask?

Any technical analyses, case studies, or experience with utility rate structuring for major DC projects near power plants would be invaluable.

Thanks in advance.

[1] https://newhilldigitalcampus.com/

2 comments

toomuchtodovor 8 Monaten

Fundamentally, the developer is siting a load that will in some way increase the cost of power. If you want to kill the project, it should be easy to, and others in your community might be on track to do so with advocacy groups. If you want the project, you should ask very direct questions about how their power contract with the utility will be structured to ensure they are taking on the full cost burden of their load demand (versus distribution to the ratepayer population). Ask for any studies performed that provide strong evidence power costs won't go up in the area driven by this project, and what contractural guarantees they are willing to make to ensure this. No studies and/or no guarantees would not be a great indicator. As you mention, in the scope of this project, noise and water consumption are likely of minimal concern (but I would also suggest asking questions about how noise and water consumption will be independently monitored and reported on to a public agency or government body; that data ideally ends up somewhere default public or can be obtained using a FOIA request).

I would also ask what the operating procedure is if the local nuclear generator trips; do they shed the datacenter load? Or does it pull power over transmission infra? That has been an important consideration for projects who argue they are consuming local nuclear generation, avoiding the question of "How are you backing the generation if your datacenter load continues to operate and they trip?" This impacts capacity auction pricing in the balancing area/ISO/TSO, which further contributes to ratepayer increases (observed and stated by PJM).

Resources:

https://www.canarymedia.com/articles/utilities/north-carolin...

https://www.wral.com/news/local/data-center-power-grid-tarbo...

https://ncleg.gov/Sessions/2025/Bills/Senate/PDF/S266v0.pdf

https://www.utilitydive.com/news/data-centers-pjm-capacity-a...

https://www.datacenterwatch.org/report

The Data Center Resistance Has Arrived - https://news.ycombinator.com/item?id=45938909 - November 2025

https://news.ycombinator.com/item?id=45783874 (citations on power cost increases)

rtp4mevor 8 Monaten

Thank you very much! So much to learn...