Home / Contact GPID / Elected Officials GRANTS PASS IRRIGATION DISTRICT Frequently Asked Questions about GPID September 1, 2001 10. Question: What about the sediment behind the diversion? Isn't it full of contaminated materials? Aren't there millions of yards of material behind the diversion? Answer: No to both questions. The Bureau of Reclamation (BOR) completed the Sediment Evaluation Study and issued a report. According to the BOR, there is no contaminated materials behind the diversion and 200,000 cubic yards of sediment. (Contact GPID Office for information on how to get a copy of the sediment study.) |