HomeMy WebLinkAboutB17-0340_Response_1507227701.pdf Item No.1 Groundwater
Based upon the information in the geotech report, groundwater should be below the
bottom of the excavation. Upon completion of the installation of the micropiles, Yenter
forces will have demobilized from the site. Based upon experience working in the Vail
area, there is always the possibility of groundwater in permeable gravel layers from
glacial deposits. The excavator, in accordance with OSHA requirements will have a
competent person on site. One of his responsibilities is to monitor and prevent water
accumulation. Typically this water can be handled with a sump pump, sandbags, or
possibly a berm.
In the event water is encountered, the competent person needs to contact Mr. Muller
Item No. 2 Minimum distance for Heavy Loads
Minimum distance for heavy loads is 15 ft. from the front of the cap. Point loads from
crane outriggers can also be carried by vertical micropiles with a concrete cap. We
would need to know the exact location and the outrigger load. The track on an
excavator must be at least five (5)from the front face of the cap.
Item No. 3 Conflict with dry utilities.
The exact location of the dry utility needs to be confirmed by potholing. It may or may
not conflict with cap beam. We can field fit the location of the cap beam and micropiles if
if necessary.
Item No. 4 Surface drainage
See item no. 1 —This is also the responsibility of the competent person.
Item No. 5 Subsurface Boulder drilled through
This is extremely important and the excavator must not try to remove boulders in the
wall.
Item No. 6 Top of cap beam conflicts with footing and stem wall.
A requirement of the shoring is to provide a safe working area for employees. General
Requirements of 1926.651 (OSHA) requires both safe access and egress for
employees. A minimum of two (2) ladders will be required at this site. We consider the
dimensions of the shoring to be an absolute minimum for safe access at the site using
ladders. Where practical we will field adjust the location and angle of the battered pile
and cap beam to avoid conflicts with the footing and stem wall.
Item No. 7 Sheet 3 of 5, Conflict with Telecommunication Cable and on Utility Easement
As noted above the easement is not adequate to allow safe access or egress and
sufficient space for the structural elements required to safely support the excavation.
The telecommunications line shown on the drawings may or may not be its exact
location. Prior to starting work the line needs to be potholed in several locations and it's
XYZ coordinates determined. There may be sufficient slack in the line to relocate the
line or we may be able to adjust the cap beam and micropiles to avoid any conflict.
The piles cannot be safely removed. Normally shoring is removed only when it is
comprised of materials that could possibly decay and leave voids.
Item No. 8 Plan view shows 15 ft. The profile views have been revised to show the
correct dimension.