Curated reference and analysis. Last full review: June 17, 2026
Verify all figures against ISO sources before relying on them for project decisions.
Grid Interconnection Tracker
U.S. ISO / RTO Large-Load Positioning
← Overview
Exhibit 2 · Project signal

Amazon AWS Rainier (Project Rainier)

Data Center · Under Construction
ISO/RTO:PJMConfidence:High
Status
Under Construction
State
IN
County
St. Joseph County
Nearest city
New Carlisle
ISO / RTO
PJM Interconnection
Utility
Indiana Michigan Power (AEP)
Developer / owner
Amazon Web Services; compute for Anthropic
Estimated load
2,200 MW
Estimated generation
Not disclosed
Reported capex (as cited)
Multi-billion, part of Amazon's large Indiana investment
Announced
2024
Expected COD
Phased; partial operation underway
Public summary
A large AWS campus near New Carlisle running training and inference for Anthropic. Seven data centers operate of roughly 30 planned, drawing about 2.2 GW at full build.
Grid relevance
State officials opened an inquiry into whether construction dewatering dried local wells. The case shows water and community impact becoming a constraint alongside power.
Last updated
2026-06-17
Sources
← Back to PJM profile