gump13,
Have you tried some of the safety-focused regulatory groups: MSHA, OSHA, and others? They often have data available for the asking. MSHA is quite open with their 'fatalgram' packages, along with a considerable amount of training packets or packages, often directed at weekly or toolbox programs.
We used these on a regularly for our weeklies and crew safety meetings.
Also, professional societies and trade organizations have quite a bit of info along these lines. You may have to call/e-mail for assistance. Try SME (smenet.org), CIM, Master Mechanics, the National Stone, Sand and Gravel Association, state mine & quarry associations, etc. The Department of Labor has many industrial groups in addition to MSHA with their particular focus on safety.
Frankly, if your facility(ies) are organized, the union(s) may have a fair amount of stuff which would be useful.
Have you particular equipment lines which would be appropriate for safety matters? Many vendors & manufacturers have data and safety-meeting-appropriate packets or presentations at the ready.
On the environmental side, the regulatory agencies (State and Federal) often have public information packets which may be useful and appropriate (MSDS use, general water monitoring/quality issues, etc.). Asking them can be a pleasant surprise, as they often don't get requests for information on anything other than a brushfire/excursion/spill event... .
Hope these ideas help now. They were steps I successfully took back in the old phone and stamp-licking days... .