Civic Intelligence

Black Rock Mine Service LLC

Plan context: Black Rock Mine Service LLC 401K Plan

EIN 45-2727319 • Gillette, WY • 13 filings • 2 plans

1507 Energy StreetGillette, WY 82716
Current Snapshot

Latest Year

2025

2025 Participants

36

2025 Assets

$278,482

2025 Contributions

$135,056

Historical Graphs

Total Assets Over Time

Aggregate end-of-year assets by filing year, excluding zero-asset years

$764,904$382,452$0201420202025YearValue
$278,482Latest year 2025

Participants Over Time

Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans

37190201420202025YearValue
36Latest year 2025

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 / FilingFilingsParticipantsAssetsContributionsContrib./Participant
2025136$278,482$135,056$3,752iApproximate average salary by contribution assumption: employee only about $93,789 at 4% or $62,526 at 6%; with 50% employer match about $62,526 at 4% or $41,684 at 6%; with 100% employer match about $46,894 at 4% or $31,263 at 6%.
Black Rock Mine Service LLC 401K Plan-36$278,482$135,056$3,752iApproximate average salary by contribution assumption: employee only about $93,789 at 4% or $62,526 at 6%; with 50% employer match about $62,526 at 4% or $41,684 at 6%; with 100% employer match about $46,894 at 4% or $31,263 at 6%.
2024231$764,904$13,124$423iApproximate average salary by contribution assumption: employee only about $10,584 at 4% or $7,056 at 6%; with 50% employer match about $7,056 at 4% or $4,704 at 6%; with 100% employer match about $5,292 at 4% or $3,528 at 6%.
Black Rock Mine Service LLC 401K Plan-31$382,452$6,562$212iApproximate average salary by contribution assumption: employee only about $5,292 at 4% or $3,528 at 6%; with 50% employer match about $3,528 at 4% or $2,352 at 6%; with 100% employer match about $2,646 at 4% or $1,764 at 6%.
Black Rock Mine Service LLC 401K Plan-31$382,452$6,562$212iApproximate average salary by contribution assumption: employee only about $5,292 at 4% or $3,528 at 6%; with 50% employer match about $3,528 at 4% or $2,352 at 6%; with 100% employer match about $2,646 at 4% or $1,764 at 6%.
2023131$373,616$24,932$804iApproximate average salary by contribution assumption: employee only about $20,106 at 4% or $13,404 at 6%; with 50% employer match about $13,404 at 4% or $8,936 at 6%; with 100% employer match about $10,053 at 4% or $6,702 at 6%.
Black Rock Mine Service LLC 401K Plan-31$373,616$24,932$804iApproximate average salary by contribution assumption: employee only about $20,106 at 4% or $13,404 at 6%; with 50% employer match about $13,404 at 4% or $8,936 at 6%; with 100% employer match about $10,053 at 4% or $6,702 at 6%.
2022131$330,841$21,036$679iApproximate average salary by contribution assumption: employee only about $16,965 at 4% or $11,310 at 6%; with 50% employer match about $11,310 at 4% or $7,540 at 6%; with 100% employer match about $8,482 at 4% or $5,655 at 6%.
Black Rock Mine Service LLC 401K Plan-31$330,841$21,036$679iApproximate average salary by contribution assumption: employee only about $16,965 at 4% or $11,310 at 6%; with 50% employer match about $11,310 at 4% or $7,540 at 6%; with 100% employer match about $8,482 at 4% or $5,655 at 6%.
2021131$397,544$23,771$767iApproximate average salary by contribution assumption: employee only about $19,170 at 4% or $12,780 at 6%; with 50% employer match about $12,780 at 4% or $8,520 at 6%; with 100% employer match about $9,585 at 4% or $6,390 at 6%.
Black Rock Mine Service LLC 401K Plan-31$397,544$23,771$767iApproximate average salary by contribution assumption: employee only about $19,170 at 4% or $12,780 at 6%; with 50% employer match about $12,780 at 4% or $8,520 at 6%; with 100% employer match about $9,585 at 4% or $6,390 at 6%.
2020131$361,134$49,985$1,612iApproximate average salary by contribution assumption: employee only about $40,310 at 4% or $26,874 at 6%; with 50% employer match about $26,874 at 4% or $17,916 at 6%; with 100% employer match about $20,155 at 4% or $13,437 at 6%.
Black Rock Mine Service LLC 401K Plan-31$361,134$49,985$1,612iApproximate average salary by contribution assumption: employee only about $40,310 at 4% or $26,874 at 6%; with 50% employer match about $26,874 at 4% or $17,916 at 6%; with 100% employer match about $20,155 at 4% or $13,437 at 6%.
2019137$370,208$86,233$2,331iApproximate average salary by contribution assumption: employee only about $58,266 at 4% or $38,844 at 6%; with 50% employer match about $38,844 at 4% or $25,896 at 6%; with 100% employer match about $29,133 at 4% or $19,422 at 6%.
Black Rock Mine Service LLC 401K Plan-37$370,208$86,233$2,331iApproximate average salary by contribution assumption: employee only about $58,266 at 4% or $38,844 at 6%; with 50% employer match about $38,844 at 4% or $25,896 at 6%; with 100% employer match about $29,133 at 4% or $19,422 at 6%.
2018136$278,482$135,056$3,752iApproximate average salary by contribution assumption: employee only about $93,789 at 4% or $62,526 at 6%; with 50% employer match about $62,526 at 4% or $41,684 at 6%; with 100% employer match about $46,894 at 4% or $31,263 at 6%.
Black Rock Mine Service LLC 401K Plan-36$278,482$135,056$3,752iApproximate average salary by contribution assumption: employee only about $93,789 at 4% or $62,526 at 6%; with 50% employer match about $62,526 at 4% or $41,684 at 6%; with 100% employer match about $46,894 at 4% or $31,263 at 6%.
2017127$178,819$75,461$2,795iApproximate average salary by contribution assumption: employee only about $69,871 at 4% or $46,581 at 6%; with 50% employer match about $46,581 at 4% or $31,054 at 6%; with 100% employer match about $34,936 at 4% or $23,290 at 6%.
Black Rock Mine Service LLC 401K Plan-27$178,819$75,461$2,795iApproximate average salary by contribution assumption: employee only about $69,871 at 4% or $46,581 at 6%; with 50% employer match about $46,581 at 4% or $31,054 at 6%; with 100% employer match about $34,936 at 4% or $23,290 at 6%.
2016118$106,005$35,506$1,973iApproximate average salary by contribution assumption: employee only about $49,314 at 4% or $32,876 at 6%; with 50% employer match about $32,876 at 4% or $21,917 at 6%; with 100% employer match about $24,657 at 4% or $16,438 at 6%.
Black Rock Mine Service LLC 401K Plan-18$106,005$35,506$1,973iApproximate average salary by contribution assumption: employee only about $49,314 at 4% or $32,876 at 6%; with 50% employer match about $32,876 at 4% or $21,917 at 6%; with 100% employer match about $24,657 at 4% or $16,438 at 6%.
2015113$70,218$66,819$5,140iApproximate average salary by contribution assumption: employee only about $128,498 at 4% or $85,665 at 6%; with 50% employer match about $85,665 at 4% or $57,110 at 6%; with 100% employer match about $64,249 at 4% or $42,833 at 6%.
Black Rock Mine Service LLC 401K Plan-13$70,218$66,819$5,140iApproximate average salary by contribution assumption: employee only about $128,498 at 4% or $85,665 at 6%; with 50% employer match about $85,665 at 4% or $57,110 at 6%; with 100% employer match about $64,249 at 4% or $42,833 at 6%.
201414$14,378$14,025$3,506iApproximate average salary by contribution assumption: employee only about $87,656 at 4% or $58,438 at 6%; with 50% employer match about $58,438 at 4% or $38,958 at 6%; with 100% employer match about $43,828 at 4% or $29,219 at 6%.
Black Rock Mine Service LLC 401K Plan-4$14,378$14,025$3,506iApproximate average salary by contribution assumption: employee only about $87,656 at 4% or $58,438 at 6%; with 50% employer match about $58,438 at 4% or $38,958 at 6%; with 100% employer match about $43,828 at 4% or $29,219 at 6%.