Semco Energy Inc.
Plan context: Enstar Natural Gas Company Retirement Plan for Salaried Employees
EIN 38-2144267 • Port Huron, MI • 265 filings • 63 plans
Current Snapshot
Latest Year
2024
2024 Participants
82
2024 Assets
$246,338,710
2024 Contributions
$1,142,959
Historical Graphs
Total Assets Over Time
Aggregate end-of-year assets by filing year, excluding zero-asset years
Participants Over Time
Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans
Company Timeline
Year summaries and individual filings are combined here so you can stay in one place while moving across years and plan filings.
| Year / Filing | Filings | Participants | Assets | Contributions | Contrib./Participant |
|---|---|---|---|---|---|
| 2024 | 4 | 82 | $246,338,710 | $1,142,959 | $13,939iApproximate average salary by contribution assumption: employee only about $348,463 at 4% or $232,309 at 6%; with 50% employer match about $232,309 at 4% or $154,872 at 6%; with 100% employer match about $174,232 at 4% or $116,154 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 82 | $152,088,057 | $222,863 | $2,718iApproximate average salary by contribution assumption: employee only about $67,946 at 4% or $45,297 at 6%; with 50% employer match about $45,297 at 4% or $30,198 at 6%; with 100% employer match about $33,973 at 4% or $22,649 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 62 | $81,977,180 | $90,557 | $1,461iApproximate average salary by contribution assumption: employee only about $36,515 at 4% or $24,343 at 6%; with 50% employer match about $24,343 at 4% or $16,229 at 6%; with 100% employer match about $18,257 at 4% or $12,172 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | 0 | $11,847,530 | $801,150 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 9 | $425,943 | $28,389 | $3,154iApproximate average salary by contribution assumption: employee only about $78,858 at 4% or $52,572 at 6%; with 50% employer match about $52,572 at 4% or $35,048 at 6%; with 100% employer match about $39,429 at 4% or $26,286 at 6%. |
| 2023 | 4 | 112 | $231,952,613 | $1,846,286 | $16,485iApproximate average salary by contribution assumption: employee only about $412,117 at 4% or $274,745 at 6%; with 50% employer match about $274,745 at 4% or $183,163 at 6%; with 100% employer match about $206,059 at 4% or $137,372 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 112 | $142,917,348 | $413,280 | $3,690iApproximate average salary by contribution assumption: employee only about $92,250 at 4% or $61,500 at 6%; with 50% employer match about $61,500 at 4% or $41,000 at 6%; with 100% employer match about $46,125 at 4% or $30,750 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 70 | $76,897,049 | $312,168 | $4,460iApproximate average salary by contribution assumption: employee only about $111,489 at 4% or $74,326 at 6%; with 50% employer match about $74,326 at 4% or $49,550 at 6%; with 100% employer match about $55,744 at 4% or $37,163 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | 0 | $11,720,960 | $1,091,406 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 9 | $417,256 | $29,432 | $3,270iApproximate average salary by contribution assumption: employee only about $81,756 at 4% or $54,504 at 6%; with 50% employer match about $54,504 at 4% or $36,336 at 6%; with 100% employer match about $40,878 at 4% or $27,252 at 6%. |
| 2022 | 5 | 158 | $281,209,641 | $943,287 | $5,970iApproximate average salary by contribution assumption: employee only about $149,254 at 4% or $99,503 at 6%; with 50% employer match about $99,503 at 4% or $66,335 at 6%; with 100% employer match about $74,627 at 4% or $49,751 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 158 | $158,821,037 | - | - |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 77 | $69,941,339 | - | - |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 65 | $41,066,008 | - | - |
| Semco Energy Inc. Retiree Medical Plan | - | 0 | $11,046,437 | $914,224 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 9 | $334,820 | $29,063 | $3,229iApproximate average salary by contribution assumption: employee only about $80,731 at 4% or $53,820 at 6%; with 50% employer match about $53,820 at 4% or $35,880 at 6%; with 100% employer match about $40,365 at 4% or $26,910 at 6%. |
| 2021 | 7 | 202 | $348,824,388 | $3,158,154 | $15,634iApproximate average salary by contribution assumption: employee only about $390,861 at 4% or $260,574 at 6%; with 50% employer match about $260,574 at 4% or $173,716 at 6%; with 100% employer match about $195,430 at 4% or $130,287 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 202 | $196,695,392 | $1,161,734 | $5,751iApproximate average salary by contribution assumption: employee only about $143,779 at 4% or $95,853 at 6%; with 50% employer match about $95,853 at 4% or $63,902 at 6%; with 100% employer match about $71,889 at 4% or $47,926 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 100 | $86,611,114 | $182,887 | $1,829iApproximate average salary by contribution assumption: employee only about $45,722 at 4% or $30,481 at 6%; with 50% employer match about $30,481 at 4% or $20,321 at 6%; with 100% employer match about $22,861 at 4% or $15,241 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 88 | $50,783,082 | - | - |
| Semco Energy Inc. Retiree Medical Plan | - | 0 | $14,329,278 | $1,787,095 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 9 | $405,522 | $26,438 | $2,938iApproximate average salary by contribution assumption: employee only about $73,439 at 4% or $48,959 at 6%; with 50% employer match about $48,959 at 4% or $32,640 at 6%; with 100% employer match about $36,719 at 4% or $24,480 at 6%. |
| Group Insurance Plan | - | 0 | - | - | - |
| Semco Energy Inc. Flexible Benefit Plan | - | 0 | - | - | - |
| 2020 | 7 | 611 | $323,121,463 | $1,136,271 | $1,860iApproximate average salary by contribution assumption: employee only about $46,492 at 4% or $30,995 at 6%; with 50% employer match about $30,995 at 4% or $20,663 at 6%; with 100% employer match about $23,246 at 4% or $15,497 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 191 | $181,468,877 | - | - |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 91 | $80,341,752 | - | - |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 81 | $47,125,233 | - | - |
| Semco Energy Inc. Retiree Medical Plan | - | 0 | $13,845,332 | $1,109,085 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 8 | $340,269 | $27,186 | $3,398iApproximate average salary by contribution assumption: employee only about $84,956 at 4% or $56,638 at 6%; with 50% employer match about $56,638 at 4% or $37,758 at 6%; with 100% employer match about $42,478 at 4% or $28,319 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 170 | - | - | - |
| Group Insurance Plan | - | 611 | - | - | - |
| 2019 | 7 | 599 | $288,716,445 | $7,724,091 | $12,895iApproximate average salary by contribution assumption: employee only about $322,374 at 4% or $214,916 at 6%; with 50% employer match about $214,916 at 4% or $143,278 at 6%; with 100% employer match about $161,187 at 4% or $107,458 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 202 | $161,887,079 | $4,475,713 | $22,157iApproximate average salary by contribution assumption: employee only about $553,925 at 4% or $369,283 at 6%; with 50% employer match about $369,283 at 4% or $246,189 at 6%; with 100% employer match about $276,962 at 4% or $184,642 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 100 | $71,656,519 | $1,195,618 | $11,956iApproximate average salary by contribution assumption: employee only about $298,905 at 4% or $199,270 at 6%; with 50% employer match about $199,270 at 4% or $132,846 at 6%; with 100% employer match about $149,452 at 4% or $99,635 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 88 | $41,982,392 | $447,084 | $5,081iApproximate average salary by contribution assumption: employee only about $127,013 at 4% or $84,675 at 6%; with 50% employer match about $84,675 at 4% or $56,450 at 6%; with 100% employer match about $63,506 at 4% or $42,338 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | - | $12,871,287 | $1,584,438 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 9 | $319,168 | $21,238 | $2,360iApproximate average salary by contribution assumption: employee only about $58,994 at 4% or $39,330 at 6%; with 50% employer match about $39,330 at 4% or $26,220 at 6%; with 100% employer match about $29,497 at 4% or $19,665 at 6%. |
| Group Insurance Plan | - | 599 | - | - | - |
| Semco Energy Inc. Flexible Benefit Plan | - | 180 | - | - | - |
| 2018 | 7 | 597 | $244,700,636 | $8,347,104 | $13,982iApproximate average salary by contribution assumption: employee only about $349,544 at 4% or $233,029 at 6%; with 50% employer match about $233,029 at 4% or $155,353 at 6%; with 100% employer match about $174,772 at 4% or $116,515 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 202 | $136,136,064 | $4,848,214 | $24,001iApproximate average salary by contribution assumption: employee only about $600,026 at 4% or $400,018 at 6%; with 50% employer match about $400,018 at 4% or $266,678 at 6%; with 100% employer match about $300,013 at 4% or $200,009 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 97 | $60,862,789 | $1,550,508 | $15,985iApproximate average salary by contribution assumption: employee only about $399,615 at 4% or $266,410 at 6%; with 50% employer match about $266,410 at 4% or $177,607 at 6%; with 100% employer match about $199,808 at 4% or $133,205 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 92 | $35,817,602 | $989,707 | $10,758iApproximate average salary by contribution assumption: employee only about $268,942 at 4% or $179,295 at 6%; with 50% employer match about $179,295 at 4% or $119,530 at 6%; with 100% employer match about $134,471 at 4% or $89,647 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | - | $11,625,856 | $927,836 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 9 | $258,325 | $30,839 | $3,427iApproximate average salary by contribution assumption: employee only about $85,664 at 4% or $57,109 at 6%; with 50% employer match about $57,109 at 4% or $38,073 at 6%; with 100% employer match about $42,832 at 4% or $28,555 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 197 | - | - | - |
| Group Insurance Plan | - | 597 | - | - | - |
| 2017 | 7 | 580 | $259,852,099 | $6,171,850 | $10,641iApproximate average salary by contribution assumption: employee only about $266,028 at 4% or $177,352 at 6%; with 50% employer match about $177,352 at 4% or $118,235 at 6%; with 100% employer match about $133,014 at 4% or $88,676 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 209 | $143,538,956 | $3,361,838 | $16,085iApproximate average salary by contribution assumption: employee only about $402,134 at 4% or $268,089 at 6%; with 50% employer match about $268,089 at 4% or $178,726 at 6%; with 100% employer match about $201,067 at 4% or $134,045 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 106 | $64,701,199 | $891,847 | $8,414iApproximate average salary by contribution assumption: employee only about $210,341 at 4% or $140,228 at 6%; with 50% employer match about $140,228 at 4% or $93,485 at 6%; with 100% employer match about $105,171 at 4% or $70,114 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 93 | $37,926,518 | $506,252 | $5,444iApproximate average salary by contribution assumption: employee only about $136,089 at 4% or $90,726 at 6%; with 50% employer match about $90,726 at 4% or $60,484 at 6%; with 100% employer match about $68,045 at 4% or $45,363 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | - | $13,398,800 | $1,378,053 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 9 | $286,626 | $33,860 | $3,762iApproximate average salary by contribution assumption: employee only about $94,056 at 4% or $62,704 at 6%; with 50% employer match about $62,704 at 4% or $41,802 at 6%; with 100% employer match about $47,028 at 4% or $31,352 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 203 | - | - | - |
| Group Insurance Plan | - | 580 | - | - | - |
| 2016 | 8 | 704 | $359,217,654 | $23,019,999 | $32,699iApproximate average salary by contribution assumption: employee only about $817,472 at 4% or $544,981 at 6%; with 50% employer match about $544,981 at 4% or $363,321 at 6%; with 100% employer match about $408,736 at 4% or $272,491 at 6%. |
| Semco Energy Inc. 401(K) Plan | - | 704 | $132,810,331 | $10,582,656 | $15,032iApproximate average salary by contribution assumption: employee only about $375,805 at 4% or $250,536 at 6%; with 50% employer match about $250,536 at 4% or $167,024 at 6%; with 100% employer match about $187,902 at 4% or $125,268 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 223 | $124,340,051 | $7,412,104 | $33,238iApproximate average salary by contribution assumption: employee only about $830,953 at 4% or $553,969 at 6%; with 50% employer match about $553,969 at 4% or $369,313 at 6%; with 100% employer match about $415,477 at 4% or $276,984 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 109 | $56,377,585 | $2,064,628 | $18,942iApproximate average salary by contribution assumption: employee only about $473,539 at 4% or $315,692 at 6%; with 50% employer match about $315,692 at 4% or $210,462 at 6%; with 100% employer match about $236,769 at 4% or $157,846 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 99 | $33,027,634 | $1,318,271 | $13,316iApproximate average salary by contribution assumption: employee only about $332,897 at 4% or $221,931 at 6%; with 50% employer match about $221,931 at 4% or $147,954 at 6%; with 100% employer match about $166,448 at 4% or $110,966 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | - | $12,434,432 | $1,593,543 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 11 | $227,621 | $48,797 | $4,436iApproximate average salary by contribution assumption: employee only about $110,902 at 4% or $73,935 at 6%; with 50% employer match about $73,935 at 4% or $49,290 at 6%; with 100% employer match about $55,451 at 4% or $36,967 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 199 | - | - | - |
| Group Insurance Plan | - | 597 | - | - | - |
| 2015 | 8 | 664 | $331,046,196 | $18,364,969 | $27,658iApproximate average salary by contribution assumption: employee only about $691,452 at 4% or $460,968 at 6%; with 50% employer match about $460,968 at 4% or $307,312 at 6%; with 100% employer match about $345,726 at 4% or $230,484 at 6%. |
| Semco Energy Inc. 401(K) Plan | - | 664 | $123,903,595 | $8,236,891 | $12,405iApproximate average salary by contribution assumption: employee only about $310,124 at 4% or $206,749 at 6%; with 50% employer match about $206,749 at 4% or $137,833 at 6%; with 100% employer match about $155,062 at 4% or $103,375 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 235 | $111,619,577 | $6,035,320 | $25,682iApproximate average salary by contribution assumption: employee only about $642,055 at 4% or $428,037 at 6%; with 50% employer match about $428,037 at 4% or $285,358 at 6%; with 100% employer match about $321,028 at 4% or $214,018 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 119 | $51,997,252 | $1,959,800 | $16,469iApproximate average salary by contribution assumption: employee only about $411,723 at 4% or $274,482 at 6%; with 50% employer match about $274,482 at 4% or $182,988 at 6%; with 100% employer match about $205,861 at 4% or $137,241 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 110 | $30,277,363 | $935,300 | $8,503iApproximate average salary by contribution assumption: employee only about $212,568 at 4% or $141,712 at 6%; with 50% employer match about $141,712 at 4% or $94,475 at 6%; with 100% employer match about $106,284 at 4% or $70,856 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | - | $12,973,699 | $1,144,015 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 11 | $274,710 | $53,643 | $4,877iApproximate average salary by contribution assumption: employee only about $121,916 at 4% or $81,277 at 6%; with 50% employer match about $81,277 at 4% or $54,185 at 6%; with 100% employer match about $60,958 at 4% or $40,639 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 171 | - | - | - |
| Group Insurance Plan | - | 646 | - | - | - |
| 2014 | 8 | 663 | $329,523,352 | $13,766,930 | $20,765iApproximate average salary by contribution assumption: employee only about $519,115 at 4% or $346,077 at 6%; with 50% employer match about $346,077 at 4% or $230,718 at 6%; with 100% employer match about $259,558 at 4% or $173,038 at 6%. |
| Semco Energy Inc. 401(K) Plan | - | 663 | $124,342,576 | $7,459,527 | $11,251iApproximate average salary by contribution assumption: employee only about $281,279 at 4% or $187,520 at 6%; with 50% employer match about $187,520 at 4% or $125,013 at 6%; with 100% employer match about $140,640 at 4% or $93,760 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 243 | $108,864,824 | $2,711,000 | $11,156iApproximate average salary by contribution assumption: employee only about $278,909 at 4% or $185,940 at 6%; with 50% employer match about $185,940 at 4% or $123,960 at 6%; with 100% employer match about $139,455 at 4% or $92,970 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 125 | $51,618,646 | $1,315,480 | $10,524iApproximate average salary by contribution assumption: employee only about $263,096 at 4% or $175,397 at 6%; with 50% employer match about $175,397 at 4% or $116,932 at 6%; with 100% employer match about $131,548 at 4% or $87,699 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 114 | $30,130,103 | $1,324,050 | $11,614iApproximate average salary by contribution assumption: employee only about $290,362 at 4% or $193,575 at 6%; with 50% employer match about $193,575 at 4% or $129,050 at 6%; with 100% employer match about $145,181 at 4% or $96,787 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | 0 | $14,134,308 | $900,344 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 11 | $432,895 | $56,529 | $5,139iApproximate average salary by contribution assumption: employee only about $128,475 at 4% or $85,650 at 6%; with 50% employer match about $85,650 at 4% or $57,100 at 6%; with 100% employer match about $64,238 at 4% or $42,825 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 174 | - | - | - |
| Group Insurance Plan | - | 590 | - | - | - |
| 2013 | 8 | 629 | $321,104,610 | $15,071,217 | $23,961iApproximate average salary by contribution assumption: employee only about $599,015 at 4% or $399,343 at 6%; with 50% employer match about $399,343 at 4% or $266,229 at 6%; with 100% employer match about $299,507 at 4% or $199,672 at 6%. |
| Semco Energy Inc. 401(K) Plan | - | 629 | $122,942,057 | $6,379,998 | $10,143iApproximate average salary by contribution assumption: employee only about $253,577 at 4% or $169,051 at 6%; with 50% employer match about $169,051 at 4% or $112,701 at 6%; with 100% employer match about $126,789 at 4% or $84,526 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 274 | $105,657,102 | $5,243,000 | $19,135iApproximate average salary by contribution assumption: employee only about $478,376 at 4% or $318,917 at 6%; with 50% employer match about $318,917 at 4% or $212,612 at 6%; with 100% employer match about $239,188 at 4% or $159,459 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 145 | $49,435,095 | $1,380,000 | $9,517iApproximate average salary by contribution assumption: employee only about $237,931 at 4% or $158,621 at 6%; with 50% employer match about $158,621 at 4% or $105,747 at 6%; with 100% employer match about $118,966 at 4% or $79,310 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 112 | $27,953,315 | $807,000 | $7,205iApproximate average salary by contribution assumption: employee only about $180,134 at 4% or $120,089 at 6%; with 50% employer match about $120,089 at 4% or $80,060 at 6%; with 100% employer match about $90,067 at 4% or $60,045 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | - | $14,758,849 | $1,210,747 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 9 | $358,192 | $50,472 | $5,608iApproximate average salary by contribution assumption: employee only about $140,200 at 4% or $93,467 at 6%; with 50% employer match about $93,467 at 4% or $62,311 at 6%; with 100% employer match about $70,100 at 4% or $46,733 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 149 | - | - | - |
| Group Insurance Plan | - | 603 | - | - | - |
| 2012 | 8 | 600 | $268,576,219 | $20,303,373 | $33,839iApproximate average salary by contribution assumption: employee only about $845,974 at 4% or $563,983 at 6%; with 50% employer match about $563,983 at 4% or $375,988 at 6%; with 100% employer match about $422,987 at 4% or $281,991 at 6%. |
| Semco Energy Inc. 401(K) Plan | - | 600 | $104,033,014 | $6,017,681 | $10,029iApproximate average salary by contribution assumption: employee only about $250,737 at 4% or $167,158 at 6%; with 50% employer match about $167,158 at 4% or $111,439 at 6%; with 100% employer match about $125,368 at 4% or $83,579 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 289 | $85,930,159 | $5,519,732 | $19,099iApproximate average salary by contribution assumption: employee only about $477,485 at 4% or $318,324 at 6%; with 50% employer match about $318,324 at 4% or $212,216 at 6%; with 100% employer match about $238,743 at 4% or $159,162 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 146 | $41,394,671 | $4,374,738 | $29,964iApproximate average salary by contribution assumption: employee only about $749,099 at 4% or $499,399 at 6%; with 50% employer match about $499,399 at 4% or $332,933 at 6%; with 100% employer match about $374,549 at 4% or $249,700 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 117 | $23,187,348 | $3,061,990 | $26,171iApproximate average salary by contribution assumption: employee only about $654,271 at 4% or $436,181 at 6%; with 50% employer match about $436,181 at 4% or $290,787 at 6%; with 100% employer match about $327,136 at 4% or $218,090 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | - | $13,626,611 | $1,286,501 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 5 | $404,416 | $42,731 | $8,546iApproximate average salary by contribution assumption: employee only about $213,655 at 4% or $142,437 at 6%; with 50% employer match about $142,437 at 4% or $94,958 at 6%; with 100% employer match about $106,828 at 4% or $71,218 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 146 | - | - | - |
| Group Insurance Plan | - | 566 | - | - | - |
| 2011 | 8 | 600 | $231,027,195 | $13,275,140 | $22,125iApproximate average salary by contribution assumption: employee only about $553,131 at 4% or $368,754 at 6%; with 50% employer match about $368,754 at 4% or $245,836 at 6%; with 100% employer match about $276,565 at 4% or $184,377 at 6%. |
| Semco Energy Inc. 401(K) Plan | - | 600 | $92,314,876 | $5,622,839 | $9,371iApproximate average salary by contribution assumption: employee only about $234,285 at 4% or $156,190 at 6%; with 50% employer match about $156,190 at 4% or $104,127 at 6%; with 100% employer match about $117,142 at 4% or $78,095 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 288 | $73,412,078 | $4,154,000 | $14,424iApproximate average salary by contribution assumption: employee only about $360,590 at 4% or $240,394 at 6%; with 50% employer match about $240,394 at 4% or $160,262 at 6%; with 100% employer match about $180,295 at 4% or $120,197 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 146 | $33,714,007 | $1,267,000 | $8,678iApproximate average salary by contribution assumption: employee only about $216,952 at 4% or $144,635 at 6%; with 50% employer match about $144,635 at 4% or $96,423 at 6%; with 100% employer match about $108,476 at 4% or $72,317 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 121 | $18,091,566 | $1,037,000 | $8,570iApproximate average salary by contribution assumption: employee only about $214,256 at 4% or $142,837 at 6%; with 50% employer match about $142,837 at 4% or $95,225 at 6%; with 100% employer match about $107,128 at 4% or $71,419 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | - | $13,161,579 | $1,170,827 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 6 | $333,089 | $23,474 | $3,912iApproximate average salary by contribution assumption: employee only about $97,808 at 4% or $65,206 at 6%; with 50% employer match about $65,206 at 4% or $43,470 at 6%; with 100% employer match about $48,904 at 4% or $32,603 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 151 | - | - | - |
| Group Insurance Plan | - | 516 | - | - | - |
| 2010 | 8 | 598 | $227,854,918 | $13,500,070 | $22,575iApproximate average salary by contribution assumption: employee only about $564,384 at 4% or $376,256 at 6%; with 50% employer match about $376,256 at 4% or $250,837 at 6%; with 100% employer match about $282,192 at 4% or $188,128 at 6%. |
| Semco Energy Inc. 401(K) Plan | - | 598 | $90,604,802 | $5,299,795 | $8,863iApproximate average salary by contribution assumption: employee only about $221,563 at 4% or $147,709 at 6%; with 50% employer match about $147,709 at 4% or $98,473 at 6%; with 100% employer match about $110,782 at 4% or $73,854 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 286 | $71,772,560 | $3,921,000 | $13,710iApproximate average salary by contribution assumption: employee only about $342,745 at 4% or $228,497 at 6%; with 50% employer match about $228,497 at 4% or $152,331 at 6%; with 100% employer match about $171,372 at 4% or $114,248 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 146 | $33,522,136 | $1,766,000 | $12,096iApproximate average salary by contribution assumption: employee only about $302,397 at 4% or $201,598 at 6%; with 50% employer match about $201,598 at 4% or $134,399 at 6%; with 100% employer match about $151,199 at 4% or $100,799 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 126 | $17,379,169 | $1,318,000 | $10,460iApproximate average salary by contribution assumption: employee only about $261,508 at 4% or $174,339 at 6%; with 50% employer match about $174,339 at 4% or $116,226 at 6%; with 100% employer match about $130,754 at 4% or $87,169 at 6%. |
| Semco Energy Inc. Retiree Medical Plan | - | - | $14,262,138 | $1,173,024 | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 6 | $314,113 | $22,251 | $3,709iApproximate average salary by contribution assumption: employee only about $92,713 at 4% or $61,808 at 6%; with 50% employer match about $61,808 at 4% or $41,206 at 6%; with 100% employer match about $46,356 at 4% or $30,904 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 160 | - | - | - |
| Group Insurance Plan | - | 561 | - | - | - |
| 2009 | 7 | 603 | $198,414,698 | $22,072,086 | $36,604iApproximate average salary by contribution assumption: employee only about $915,095 at 4% or $610,063 at 6%; with 50% employer match about $610,063 at 4% or $406,709 at 6%; with 100% employer match about $457,547 at 4% or $305,032 at 6%. |
| Semco Energy Inc. 401(K) Plan | - | 603 | $79,571,899 | $5,117,449 | $8,487iApproximate average salary by contribution assumption: employee only about $212,166 at 4% or $141,444 at 6%; with 50% employer match about $141,444 at 4% or $94,296 at 6%; with 100% employer match about $106,083 at 4% or $70,722 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 294 | $61,797,768 | $6,653,000 | $22,629iApproximate average salary by contribution assumption: employee only about $565,731 at 4% or $377,154 at 6%; with 50% employer match about $377,154 at 4% or $251,436 at 6%; with 100% employer match about $282,866 at 4% or $188,577 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 149 | $28,815,012 | $1,858,000 | $12,470iApproximate average salary by contribution assumption: employee only about $311,745 at 4% or $207,830 at 6%; with 50% employer match about $207,830 at 4% or $138,553 at 6%; with 100% employer match about $155,872 at 4% or $103,915 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 129 | $14,339,133 | $1,414,000 | $10,961iApproximate average salary by contribution assumption: employee only about $274,031 at 4% or $182,687 at 6%; with 50% employer match about $182,687 at 4% or $121,792 at 6%; with 100% employer match about $137,016 at 4% or $91,344 at 6%. |
| Group Insurance Plan | - | 567 | $13,624,240 | $7,010,736 | $12,365iApproximate average salary by contribution assumption: employee only about $309,115 at 4% or $206,077 at 6%; with 50% employer match about $206,077 at 4% or $137,385 at 6%; with 100% employer match about $154,558 at 4% or $103,038 at 6%. |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 6 | $266,646 | $18,901 | $3,150iApproximate average salary by contribution assumption: employee only about $78,754 at 4% or $52,503 at 6%; with 50% employer match about $52,503 at 4% or $35,002 at 6%; with 100% employer match about $39,377 at 4% or $26,251 at 6%. |
| Semco Energy Inc. Flexible Benefit Plan | - | 136 | - | - | - |
| 2008 | 6 | 603 | $152,616,503 | $15,193,594 | $25,197iApproximate average salary by contribution assumption: employee only about $629,917 at 4% or $419,945 at 6%; with 50% employer match about $419,945 at 4% or $279,963 at 6%; with 100% employer match about $314,958 at 4% or $209,972 at 6%. |
| Semco Energy Inc. 401(K) Plan | - | 603 | $62,525,800 | $5,026,788 | $8,336iApproximate average salary by contribution assumption: employee only about $208,407 at 4% or $138,938 at 6%; with 50% employer match about $138,938 at 4% or $92,626 at 6%; with 100% employer match about $104,204 at 4% or $69,469 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Salaried Employees | - | 293 | $45,760,767 | $2,380,000 | $8,123iApproximate average salary by contribution assumption: employee only about $203,072 at 4% or $135,381 at 6%; with 50% employer match about $135,381 at 4% or $90,254 at 6%; with 100% employer match about $101,536 at 4% or $67,691 at 6%. |
| Semco Energy Inc. Union Employees' Retirement Plan | - | 152 | $22,152,779 | $830,000 | $5,461iApproximate average salary by contribution assumption: employee only about $136,513 at 4% or $91,009 at 6%; with 50% employer match about $91,009 at 4% or $60,673 at 6%; with 100% employer match about $68,257 at 4% or $45,504 at 6%. |
| Group Insurance Plan | - | 572 | $11,536,685 | $6,245,769 | $10,919iApproximate average salary by contribution assumption: employee only about $272,979 at 4% or $181,986 at 6%; with 50% employer match about $181,986 at 4% or $121,324 at 6%; with 100% employer match about $136,490 at 4% or $90,993 at 6%. |
| Enstar Natural Gas Company Retirement Plan for Operating and Clerical Unit Employees | - | 119 | $10,439,341 | $690,000 | $5,798iApproximate average salary by contribution assumption: employee only about $144,958 at 4% or $96,639 at 6%; with 50% employer match about $96,639 at 4% or $64,426 at 6%; with 100% employer match about $72,479 at 4% or $48,319 at 6%. |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 4 | $201,131 | $21,037 | $5,259iApproximate average salary by contribution assumption: employee only about $131,481 at 4% or $87,654 at 6%; with 50% employer match about $87,654 at 4% or $58,436 at 6%; with 100% employer match about $65,741 at 4% or $43,827 at 6%. |
| 2007 | 8 | 615 | $200,515,824 | $13,507,304 | $21,963iApproximate average salary by contribution assumption: employee only about $549,077 at 4% or $366,052 at 6%; with 50% employer match about $366,052 at 4% or $244,034 at 6%; with 100% employer match about $274,539 at 4% or $183,026 at 6%. |
| SEMCO ENERGY, INC. NON-UNION EMPLOYEES RETIREMENT MEDICAL PLAN | - | 0 | - | - | - |
| SEMCO ENERGY, INC. UNION EMPLOYEES RETIREMENT MEDICAL PLAN | - | 0 | - | - | - |
| Hotflame Employees' Profit Sharing/401(K) Plan | - | 5 | - | - | - |
| 2006 | 8 | 581 | $115,068,443 | $12,928,185 | $22,252iApproximate average salary by contribution assumption: employee only about $556,290 at 4% or $370,860 at 6%; with 50% employer match about $370,860 at 4% or $247,240 at 6%; with 100% employer match about $278,145 at 4% or $185,430 at 6%. |
| 2005 | 13 | 570 | $169,807,745 | $17,098,349 | $29,997iApproximate average salary by contribution assumption: employee only about $749,928 at 4% or $499,952 at 6%; with 50% employer match about $499,952 at 4% or $333,301 at 6%; with 100% employer match about $374,964 at 4% or $249,976 at 6%. |
| 2004 | 15 | 581 | $155,668,201 | $13,478,327 | $23,198iApproximate average salary by contribution assumption: employee only about $579,962 at 4% or $386,642 at 6%; with 50% employer match about $386,642 at 4% or $257,761 at 6%; with 100% employer match about $289,981 at 4% or $193,321 at 6%. |
| 2003 | 17 | 579 | $147,036,171 | $19,390,520 | $33,490iApproximate average salary by contribution assumption: employee only about $837,242 at 4% or $558,161 at 6%; with 50% employer match about $558,161 at 4% or $372,107 at 6%; with 100% employer match about $418,621 at 4% or $279,081 at 6%. |
| 2002 | 19 | 620 | $113,066,191 | $14,827,189 | $23,915iApproximate average salary by contribution assumption: employee only about $597,871 at 4% or $398,580 at 6%; with 50% employer match about $398,580 at 4% or $265,720 at 6%; with 100% employer match about $298,935 at 4% or $199,290 at 6%. |
| 2001 | 26 | 682 | $187,304,361 | $12,578,534 | $18,444iApproximate average salary by contribution assumption: employee only about $461,090 at 4% or $307,393 at 6%; with 50% employer match about $307,393 at 4% or $204,929 at 6%; with 100% employer match about $230,545 at 4% or $153,697 at 6%. |
| 2000 | 35 | 466 | $137,286,432 | $5,754,127 | $12,348iApproximate average salary by contribution assumption: employee only about $308,698 at 4% or $205,799 at 6%; with 50% employer match about $205,799 at 4% or $137,199 at 6%; with 100% employer match about $154,349 at 4% or $102,899 at 6%. |
| 1999 | 7 | 251 | $12,665,221 | $222,236 | $885iApproximate average salary by contribution assumption: employee only about $22,135 at 4% or $14,757 at 6%; with 50% employer match about $14,757 at 4% or $9,838 at 6%; with 100% employer match about $11,068 at 4% or $7,378 at 6%. |