Agenda - Council - 01/26/2016 - Laserfiche WebLink

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NTI recommends scarifying and re -compacting existing subgrade soils to a minimum depth of 12 inches, then proof rolling the soils using a tandem axle dump truck loaded to gross capacity (20 tons minimum) prior to placing aggregate base class 5 and bituminous pavement. NTI also recommends that if any rutting or localized unstable subgrade areas are observed during proof rolling, those areas should be subcut, moisture -conditioned, and re -compacted or removed to a stable depth, and that excavations for soil corrections in paved areas should extend 2 feet past the pavement edge. NTI estimates that a properly prepared subgrade for Andrie Street and 164th Lane would have an average stabilometer R -value of 40. NTI's pavement recommendations assume the subgrade soils and aggregate sections below paved surfaces drain to subsurface piping for eventual discharge into storm sewer. NTI also recommends that new pavements receive annual maintenance, at a minimum, to repair damages to the pavement structure, clean and infill cracks, and repair or resurface areas which exhibit reduced subgrade performance. 3.2 Watermain Watermain does not currently exist under Andrie Street or 164th Lane. 3.3 Sanitary Sewer Sanitary sewer does not currently exist under Andrie Street or 164th Lane. 3.4 Storm Sewer/Drainage Stormwater runoff drainage is currently conveyed along the outside edges of Andrie Street and 164th Lane using bituminous curbs, where it is then collected in a minimal number of concrete catch basins and routed through storm sewer pipes to existing wetlands, stormwater drainage conveyances, and ponding facilities. 3.5 Streets 3.5.1 Existing Typical Sections Andrie Street and 164th Lane are centered in 66 foot wide City -owned right-of-ways. The bituminous pavement sections are 31 feet wide from back -of -curb to back -of -curb. All curb along these streets are also bituminous. Parking is currently allowed on both sides of the streets. No pavement striping exists. 3.5.2 Maintenance History The bituminous pavement sections on both segments of Andrie Street and 164th Lane were originally constructed in 1985 and received sealcoat treatments in 1992 and 1999. Both streets have also received extensive pavement patching over the years to maintain the streets in passable condition. Feasibility Report Andrie Street and 164th Lane Reconstruction City of Ramsey Project No. 16-00 Division C Page 5