Opal's clients include nationwide Fortune 500 companies and non-regulatory government agencies. These entities retain Opal's services on refineries, manufacturing facilities, mines, resorts, parks and recreation and transportation/terminal facilities. Representative clients include:
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ARCO | ![]() |
Miller-Weingarten Realty, L.L.C. |
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Bureau of Land Management | ![]() |
Mountain Coal Company West Elk Mine |
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Colorado Dept. of Transportation | ![]() |
PricewaterhouseCoopers, L.L.P. |
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E-470 Highway Authority | ![]() |
Regional Transportation District (TREX) |
| Flint Hills Resources, L.P. | Starwood Corp. (Westin) | ||
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General Electric Company | Umetco Minerals Corporation | |
| Georgia Pacific | UNOCAL | ||
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Hayward Baker, Inc. | ![]() |
Utah Division of Oil, Gas and Mining |
| Hertz Corporation | ![]() |
W.R. Grace & Company | |
| Honeywell International, Inc. | ![]() |
Western Refining Yorktown, Inc. | |
| INVISTA | ![]() |
Weston Solutions, Inc | |
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Koch Industries |