v3.26.1
Rate and Regulatory Matters (Tables)
6 Months Ended
Jun. 30, 2026
Regulated Operations [Abstract]  
Schedule of Generation and Storage Facilities The following table provides information about each facility:
Agreement typeFacility sizeStatus of MoPSC CCNStatus of FERC approval of acquisition
In-service date(a)
Bowling Green Solar Project(b)
Self-build
50-MW
Approved March 2024Not applicableMarch 2026
Split Rail Solar Project
Build-transfer(c)
300-MW
Approved March 2024Received November 2024June 2026
Castle Bluff Natural Gas Project(b)
Self-build
800-MW
Approved October 2024Not applicableFourth quarter 2027
Big Hollow Battery Energy Storage Project(b)
Self-build
400-MW
Approved February 2026Not applicableSecond quarter 2028
Big Hollow Natural Gas Project(b)
Self-build
800-MW
Approved February 2026Not applicableThird quarter 2028
Reform Solar Project(b)
Self-build
250-MW
Approved May 2026Not applicableFourth quarter 2028
Castle Bluff Battery Energy Storage ProjectSelf-build
95-MW
Filed May 2026Not applicableSecond quarter 2028
Millcreek Battery Energy Storage ProjectSelf-build
250-MW
Filed May 2026Not applicableSecond quarter 2028
Huck Finn Battery Energy Storage ProjectSelf-build
200-MW
Filed May 2026Not applicableSecond quarter 2028
Tom Sawyer Solar ProjectBuild-transfer
175-MW
Filed May 2026Filed June 2026Fourth quarter 2028
Ringer Solar ProjectBuild-transfer
225-MW
Filed May 2026Expect to request by mid-2027Second quarter 2029
West Alton Natural Gas ProjectSelf-build
2,100-MW
Filed July 2026Not applicableFourth quarter 2031
(a)Future in-service dates, which were included in each CCN filing, are dependent on the timing of regulatory approvals and construction completion, among other things.
(b)These projects represent approximately $3.6 billion of capital expenditures.
(c)In February 2026, Ameren Missouri acquired the Split Rail Solar Project for approximately $0.6 billion.