Contact
- Mailing Address
- Attn: Ruth Costilla 420 N. Cheyenne AvenueLame Deer, MT 59043
- Phone
- (406) 477-4480 Ruth Costilla, President Listed on the 2024 LM-4 report (opens in new tab)
Federal Filing
- Members Reported
- 22
- Last Report
- 2024
- Form
- LM-4
- File Number
- 530197
Members as the union reported them on its 2024 LM-4 report. Counts may include retirees and associate members.
NLRB cases for International Association of Machinists (IAM) Elections and unfair labor practice charges across the whole union, on LaborLab Search
Sources 2
- OLMS LM-4 report, 2024 (file no. 530-197) (opens in new tab)
Checked Oct 12, 2026
- OLMS filings for file no. 530-197, labordata.bunkum.us (opens in new tab)
Checked Oct 12, 2026
Listings come from public filings with the U.S. Department of Labor and from the organizations' own websites, as of the dates under Sources. Details change, and we may have them wrong. Check with the organization before you rely on them. Use Suggest an Edit above to tell us what's out of date.