City of Edmonton - Invitation to Bid - Doc5639127857 - 935721 - Whitemud Road, Landslide Ramp Improvements - 2652

This Work includes the supply of all labour, materials, equipment and services required to complete slope reinforcement with a soil nail and flexible geomat facing system, restoration of the legacy site access ramp, naturalization and landscaping, and geotechnical drilling near Whitemud Road NW in the Ramsay Heights neighborhood between approximately Ramsay Crescent NW and 43 Avenue NW. The Work includes, but is not limited to, the following: Environmental planning, protection, and monitoring (including preparation of an Environmental Construction Operations (ECO) plan and a tree permit). Plan, obtain, implement, and maintain all required temporary traffic and pedestrian accommodation measures for the duration of the Work, to provide continuous safe access and mobility. Mobilize and demobilize all equipment, temporary utilities, and construction support systems required to initiate and complete the Work. Work site management including relocation of concrete barriers, removal of the guardrail, temporary construction facilities and laydowns, security (including temporary fencing), project signage, and protection of existing Utilities. Site clearing and grubbing of shrubs and vegetation in designated areas. Installation and pullout testing of verification (sacrificial) soil nailing. Phased excavation to design grades and production soil nailing in panels, following methods appropriate for work on steep, sensitive slopes. Slope facing and restoration after completion of each excavation and soil nailing panel - Installation of geogrid and topsoil, seeding, erosion control blankets, reinforced flexible facing (steel mesh) geomat around the soil nailing, and support soil nails, following methods appropriate for work on steep, sensitive slopes. Excavation of loose debris, load, haul off-site, and dispose of at the Contractor’s supplied disposal facility as approved by the City. Re-construction of the ramp structure - excavation of a swale, subgrade preparation, placement of a non-woven geotextile, place and compact gravel fill, erosion control matting on the swale base, and placement of riprap at the end of the swale and establishing drainage at the end of the ramp. General site naturalization and landscaping (including topsoil, seeding, erosion control blanket, and potted shrubs and tree planting). Completion of a geotechnical drilling program to drill and install geotechnical instruments – supporting access, supporting water and removing drilling cuttings, retaining Geotechnical Drilling Subcontractor, and restoring drilling access post-drilling. Work Site and access cleanup and restoration of areas disturbed by construction to pre-construction conditions, replacement of concrete barriers, and replacement of the guardrail as approved by the City. Warranty and maintenance