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<br />~' <br />frao in-situ gravel density tests taken by our personnel in similar gra- <br />vel investigations. The volume oP the overburden was derived by multi- <br />plying 1.77 million square feet by the average thickness of 2.9 feet of <br />overburden, this amounts to approximately 190,000 cubic yards over the <br />site. <br />POTENTIAL USE EVALUATION <br />The sampled material was evaluated for various potential uses based <br />on Colorado State Highway Department Specifications, which are nearly <br />identical to the Adams County Highway SpeciPlcatlons. This evaluation <br />~ is based on Pour gradation analyses and one Los Angeles abrasion test <br />performed on the sampled material. Atterberg Limits were not determined. <br />Blending and/or crushing of the aggregate will be required in order to <br />`~ meet the Colorado State Highway Department Specifications for certain uses. <br />The sampled material was evaluated for the following potential uses: <br />Aggregate for Bases - based on grain size, the aggregate meets <br />~ specifications for Class 3. Blending will <br />be required for Classes 1, 2, and 5. Crush- <br />ing will be required for Class 6 (passes 3/4 <br />~ inch sieve) and Class 7 (passes 1 Inch size). <br />Aggregate for Hot Bituminous Pavement - based on grain size and <br />~ ~ wear loss from the Los Angeles Abrasion Test, <br />blending would be required to meet specifi- <br />cations for Crading B. Crushing will be re- <br />~ quired for Grading C and E (passes 3/4 inch <br />sieve). Blending and crushing will be re- <br />-5- <br />• <br />:.~, .. ..: wa. :~. _ ..~ix...YMw1~.1~i:(--i~wu~~ www~..: ~,,-i a' _ _ _ _ ~. _ _ _ _ _ <br /> <br /> <br /> <br />