HomeMy WebLinkAboutWWP2701432.2LEGEND
/ UABION WALL -SEE. DETL\IL I'S
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GENERAL NOTES
1. An 8 foot wide permanent access road with bridge structures is to be
constructed from the pump station to a turnaround at Station 68+40±.
Interceptor sewer pipe is to be located within the access roadbed
except at locations where stream crossings are required. Upstream
from Station 68+40 the pipe is to be aligned in the existing stream
bed.
2. In addition to Standard Washington State Department of Ecology
requirements for construction, design criteria is governed by State
Department of Fisheries permit requirements. The 1984 permit (for
which a supplement must be issued by the Fisheries Department,
prior to start of construction) is bound with these documents.
3. The design edge of the permanent access road scour protection rock
shall not be constructed beyond the edge of the flowing stream bank
except at specific stream crossing locations designated.
4. Any variance to design location must be approved by the owner in
cooperation with the Washington State Department of Fisheries.
5. Typical roadway excavated uphill slopes shall not be constructed
steeper than 1:1. Where steeper excavated slopes are required,
gabion basket stacking may be used when authorized. Gabion baskets
are to be laid on the slope or stacked in specific locations when
authorized.
6. Procedures for "healing" existing slough scarps and protecting
newly excavated slopes have been reviewed with geotechnical
engineers who will be retained by the owner's engineer to provide
technical advice during construction.
7. The contractor will be required to "pioneer" a roadway along the
desired alinement for purposes of evaluating slopes and selecting
specific methods of slope erosion slabilization.
8. Seepage within slopes to be excavated and in existing slough scarps
is to be relieved and surface stabilized by one of several means
detailed in these documents.
9. Slope erosion protection measures other than jutemat are bid by the
unit to permit selection of the most suitable method for given
locations.
10. All excavated slopes are to be jute matted and planted by
hydroseeding.
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