ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
IMEA Socialized Costs Analysis of Naperville MDR with New 36MW Data Center and 85% Load Factor
2
Major Assumptions : (a) Naperville MDR Serves the Load, (b) Other Member Loads Remain Unchanged, and (c) Same IMEA Socialized Cost Levels as FY2025
3
See Further Notes on Assumptions Below at the End of Worksheet
4
5
FY2025 Without Naperville Data CenterFY2025 With Data Center
6
Naperville's Contribution to IMEA Socialized Demand Costs
Based on % of
Demand Billing Units
(Dollars)		Naperville's Contribution to IMEA Socialized Energy Costs
Based on % of
Energy
(Dollars)		Naperville's Contribution to IMEA Socialized Demand Costs
Based on % of
Demand Billing Units
(Dollars)		Naperville's Contribution to IMEA Socialized Energy Costs
Based on % of
Energy
(Dollars)		Projected Additional Socialized Costs Shifted to Naperville Due to Additional Data Center Load
7
(1) All IMEA Socialized Costs [Before and After]
8
Naperville % of Total IMEA Demand Costs $29,627,608.14$32,085,214.36$2,457,606.22
9
Naperville % of Total IMEA Energy Costs $58,361,767.79$65,901,712.48$7,539,944.69
10
(Verify % of Total $ Matches Above)34.6%34.2%37.4%38.6%
11
Total Additional Costs to Naperville Due to Increased Percentages of IMEA Demand and Energy$9,997,550.92
12
13
(2) Only the IMEA Socialized Costs of IMEA Debt Service, Prairie State O&M, and Trimble County O&M [Before and After]
14
Naperville $ % of Total IMEA Demand Costs $25,462,188.20$27,574,273.38$2,112,085.18
15
Naperville $ % of Total IMEA Energy Costs $29,650,690.01$33,481,358.12$3,830,668.11
16
(Verify % of Total $ Matches Above)34.6%34.2%37.4%38.6%
17
Additional Prairie State and Trimble County Costs to Naperville (Debt Service + O&M) Due to Increased Percentages of IMEA Demand and Energy$5,942,753.30
18
19
20
IMEA FY2025 Socialized Costs
(source data in worksheet FY2025_Totals)		IMEA Demand
SRDC		IMEA Energy
SREC
21
Total IMEA Socialized Costa$85,744,282.13 $170,765,895.95
22
Debt Service$38,398,525.75 $38,398,525.80
23
Prairie State Fuel$0.00 $20,238,102.67
24
Prairie State Non-Fuel Oper$28,153,721.28 $5,538,170.51
25
Trimble Co. Non-Fuel Oper.$1,261,601.48 $0.00
26
Trimble County Fixed$5,875,429.35 $0.00
27
Trimble County Fuel$0.00 $22,582,796.56
28
Total Debt, Prairie and Trimble$73,689,277.86 $86,757,595.54
29
% of Total for Debt, Prairie and Trimble 85.9%50.8%
30
31
32
IMEA Demand and Energy FY2025 Without Naperville Data CenterFY2025 With Naperville Data Center
33
FY2025Non-coincident Peak Demand (kW)Demand Billing Units
for
Entire 12 Month FY
(kW-month)		Energy
(kWh)		Non-coincident Peak Demand With
Data Center
(kW) 		Demand Billing Units
With
Data Center
(kW- month) 		Energy
With
Data Center
(kWh)
34
Naperville347,0822,770,2881,274,124,448377,6823,137,4881,542,180,448
35
IMEA Members Total945,8028,017,3993,728,074,237976,4028,384,5993,996,130,237
36
Naperville %36.7%34.6%34.2%38.7%37.4%38.6%
37
Other 31 Members % of Total63.3%65.4%65.8%61.3%62.6%61.4%
38
39
40
Projected 36MW Data Center with 85% Load Factor
41
36MW = 36000kW85% Load FactorData Center Peak Demand (kW)DataCenter
Energy
per Year
(kWh)
42
36,00085%30,600268,056,000
43
44
45
NOTES:
46
Major Assumptions : (a) Naperville MDR Serves the Load, (b) Other Member Loads Remain Unchanged, and (c) Same IMEA Socialized Cost Levels as FY2025
47
Further notes on assumptions:
48
- Since Naperville MDR serves the entire data center load, there are little to no additional demand and energy costs to IMEA.
49
and IMEA simply passes through to Naperville the PJM credits IMEA receives for the MDR resoruce.
50
 - Not included is a full year of the new IMEA billing charge for the Praire State and Trimble County coal-plant decommissioning fund
51
 - Not included is the IMEA Rate Schedule B "Adder" of 3.50 Mills/kWh" used by IMEA to fund Capital Additions and General Reserve Fund
52
 - Therefore, not included are further capital costs for Prairie State and Trimble County
53
 - Also not included are transmission category socialized costs which are assumed to be roughly the same with or without MDR.
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100