Agenda - Council - 05/14/2024 - Laserfiche WebLink

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August 8,2023 Itt Project 23-193 City Project#24-01 Fox Ridge Estates Ramsey,Minnesota pavement section. We recommend that all fill material be free of soft, wet, or frozen soils, highly expansive soils, rubble, debris, and rocks in excess of 6 inches in diameter. The fill should be as uniform as possible both in composition and moisture content. We recommend all fill be compacted to the minimum relative density levels shown in the table below: Location Recommended Compaction Level (Percent of Std.Proctor ASTM D698) Below Pavements,deeper than 3 feet from finished subgrade 95% Below Pavements within 3 feet of finished subgrade 100% Landscape Areas 90% We recommend all fill placed in the roadway areas be compacted in 8-inch loose lifts. All fill should be compacted at a moisture content within plus or minus 3% of the optimum moisture as determined by a standard proctor. We recommend compaction tests be taken on any utility trench backfill at a rate of one test per 200 feet in the bottom, middle and top thirds of the trench backfill. We recommend compaction tests be taken at a rate of one test for two feet depth of fill per 200 linear feet of roadway fill. We recommend compaction tests be taken at a rate of one test per 200 linear feet on the finished roadway subgrade and aggregate base layer. Embankment/Road Fill: The on-site soils consisting of fine grained, poorly graded sand (SP), poorly graded sand with silt (SP-SM) and silty sands (SM) are considered excellent material for use as roadway subgrade material. These soils are easy to compact using vibratory compaction equipment near their optimum moisture contents. The silt(ML), silty clay (CL-ML) and highly plastic clay(CH) should be avoided for embankment fill material within four feet of finished grade. We recommend that any imported fill and utility trench backfill material consist of mineral soils meeting the requirements specified below. No organic soils, roots, stumps, logs, brush, etc. Page 8