ST. CLAIR COUNTY
SMITHS CREEK LANDFILL
6779 Smiths Creek Road
Smiths Creek, Michigan 48074
REQUEST FOR PROPOSAL
DATE:
TO:
FROM:
PHONE:
Aug. 19, 2011
Geosynthetic Contractors
Matt Williams, Landfill/Resource Recovery Manager
(810) 989-6979
FAX: (810) 367-3062
Introduction
The Smiths Creek Landfill is seeking proposals from geosynthetic contractors to
assist in removing the geomembrane for a temporary rainflap and subsequent
repairs to geosynthetics in Cell 7 at Smiths Creek Landfill (SCL, Owner). The
project consists of removing approximately 500 feet of 60-mil HDPE
geomembrane rainflap and repairing the geocomposite drainage layer above the
base liner system and necessary repairs on the geomembrane.
Project Summary
A temporary geomembrane rainflap was installed in Cell 7 in November 2009.
The installed rainflap is approximately 500 feet in length and was extrusion
welded to the floor, the west slope, and east perimeter berm of Cell 7 (see Figures
1 and 2). The geocomposite was cut and rolled back for welding the
geomembrane rainflap to the existing liner.
The selected contractor will provide a crew to cut and remove the geomembrane
rainflap, repair the geocomposite drainage layer and repair the geomembrane as
necessary. The cut geonet shall be reconnected with nylon ties every six inches.
If the geonet cannot be reconnected, a geonet patch shall be placed overlapping
two feet beyond the edges of the gap. The geonet patch (if required), will be
supplied by the owner and shall be secured to the existing geonet every six inches
using nylon ties. A layer of geotextile (supplied by Owner) shall be heat bonded
or sewed on the top geotextile of the existing geocomposite. The new textile
shall overlap the repaired seam with a minimum of twelve inches on each side.
A third party CQA consultant will be onsite to oversee the activities and inspect
the base liner geomembrane on removal of the rainflap. If any area of the base
liner geomembrane is requiring repair, the contractor will complete the repairs as
deemed necessary by the CQA Manager onsite. The geomembrane shall be
repaired and tested according to the SCL CQA Plan (Attachment 1). A field
tensiometer and vacuum box testing apparatus will be required onsite for this
task.
Proposal Requirements
The proposal must be structured in a Time and Materials Not-to-Exceed format.
SCL will provide the heavy equipment support for moving soil and positioning
geotextile rolls. The proposal shall be submitted to Matt Williams of St. Clair
County, Smiths Creek Landfill by Close of Business (4:30p.m. EDT) September 16,
2011. The contractor awarded the work will be contacted to set up a schedule to
complete the work.
Figures and Attachment
Figure 1. Cell 7 Rainflap Berm Plan As-Built Drawing
Figure 2. Cell 7 Rainflap Berm Details As-Built Drawing
Attachment 1. Smiths Creek Landfill Construction Quality Assurance Plan