From 01/28/2015:
Please be advised that the State Board of Licensure for Architects, Professional Engineers, and Professional Land Surveyors (“Board”) considers grading certifications and grading design statements that include language stating or implying that the grading design accurately reflects the design intent of an approved grading plan, that the grading will or will not cause storm water damage, or that the lot will drain adequately to constitute the practice of engineering.
As the design, evaluation, and analysis of grading and/or drainage plans are considered the practice of engineering, these plans should be prepared by an engineer utilizing data provided by a professional land surveyor. Preparing grading and drainage plans is not within the scope of the practice of land surveying. If a land surveyor makes a certification on a grading or drainage plan, it should be limited to determined elevations of land parcels and must not contain statements of engineering design, evaluation, or analysis.
An individual who, without being licensed as a Colorado professional engineer, prepares, signs, or seals such a grading design statement violates state statute and may be subject to legal action by the Board, including but not limited to a cease and desist order or injunction. Professional land surveyors who are not also licensed as a Colorado professional engineer are not authorized to engage in the practice of engineering.
So... The question becomes how bunker work escapes the definition of grading and drainage, which was the earlier discussion.
Of course I am not sure of Colorado laws, but most such are to guard basic public safety, and that specifically mentions lots, etc. A bunker wouldn't affect drainage of individual lots or even a regional watershed. In most places, golf course architects are already not doing master drainage plans for a site, that determine pre and post construction drainage flows, detention and compensatory storage, etc.
Of course, I do share your concerns as to where an overzealous govt. department can keep adding regulations that aren't remotely necessary just to keep their own jobs and department funding levels.....and yes, you can call me a cynic if you want. But, it has happened, at least in the opinion of some or many.