2016-08-10_REPORT - M2004009 - Laserfiche WebLink

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ASCI —Turnpike Reservoir —Erie, Colorado EEC Project No. 1134011 August 8, 2016 Page 2 Earth Engineering Consultants, LLC 2 -NQ Ouf-l-, tAq> Their resources includes personnel, heavy highway equipment such as Dozers, Front End Loaders, Self -propel Compacter, Water Truck and 30 Yard Haul Trucks to place uniform lifts not to exceed 2-3 foot lifts. The equipment, especially the dozer and compactor, simulate the compaction efforts needed. Each lift is tested for percent compaction along with a Flex -Wall permeability testing procedures; with field density results presented herein, and Flex Wall results being provided at a later date. The field density tests were completed at random locations and elevations in the embankment fill zone as noted herein, and were performed in general accordance with ASTM Specification D6938. The results of the field density tests completed by EEC personnel during the referenced period are shown on the attached summary sheets. The field density test results, at the locations as described herein, conformed to the minimum project compaction requirements of at least 90% of standard Proctor maximum dry density (ASTM Specification D698) and were within the allotted moisture content range of 7% to 18% of the material's optimum moisture content, as per the agreed upon CQC/QA plan dated March 12, 2013. Laboratory Testing As per the CQC/QA plan, EEC personnel, during the site visit on July 5, 2016, obtained a relatively undisturbed sample of the previously placed and compacted shale/siltstone bedrock material by hand driving a "Shelby -tube" device approximately 12 to 18 -inches into the compacted zone. This was performed to obtain a sample for hydraulic conductivity testing in general accordance with ASTM D 5084 Specifications. The sample was obtained at the general location of EEC Field Density Test No. 31. Laboratory testing performed on the retrieved hydraulic conductivity sample included a remolded "Flex - Wall Permeameter" test in general accordance with ASTM Specification D 5084 Method C, results are shown below and are also included on the attached summary sheet. Glo►�R�7I�ii`t''i :� tb IFELv Hydraulic Conductivity Test Results Laboratory Testing - Soil Classification Hydraulic Conductivity Sample ID In -Situ In -Situ Dry Final Moisture Final Dry Hydraulic Moisture, % Density, PCF Content, % Density, PCF Conductivity, cm/sec 6 12.4 107.0 22.0 104.0 2.O x H Based on the reported field density test results and the laboratory test results as presented herein, this phase/lift of the placed and compacted shale/siltstone bedrock material generally conforms to the project specifications and the CQC/QA plan dated March 12, 2013.