HomeMy WebLinkAboutAV 91-12; Hill Residence; Administrative Variance (AV) (10)August 3, 1993
Mr. Steve Hill
331 7 Cadencia Street
Carlsbad, Ca 92009
ENGINEERING REPORT FOR ADMINISTRATIVE VARIANCE 91 -1 2 - HILL RESIDENCE
Pursuant to our discussions at your residence last week, I prepared the following list
of criteria which should be included in the addendum to Mr. Vernon's engineering
report:
1.
2.
3.
4.
5.
6.
A site plan of your property drawn to scale showing the location of your house,
retaining wall, driveway and side yard structure. The plan should include spot
elevations of the rear yard, top of wall, bottom of wall (front and back of
structure), pavement elevation next to the house (front and back), each of the
surface inlets (including the one in the back yard), each of the pipe outlets and
the curb flowline at the driveway.
Include on the site plan a depiction of the subdrainage pipes which were
existing or installed behind the wall and beneath the slab and driveway. Indicate
pipe size, type of pipe, presence of perforations, presence and location of any
permeable membranes or rock beddings, and invert elevations where available.
Include cross section of construction techniques used for subsurface drains.
Include in the report a discussion on the adequacy of the installed surface
subdrains. Include calculations and supporting hydrology where necessary.
Include a discussion on the potential reason why the surface and subsurface
protection measures may have failed and how the presence of the roof
structure 'solved' the problem'. Were the surface drains or pavement grades
inadequate or was there some other design or construction deficiency 3
Include a characterization of the existing soils and how it may have contributed
to the problem.
Provide recommended measures to alleviate the problem assuming the roof
structure is required to be removed from the sideyard setback. Include a cost
estimate for the proposed remedial measures.
2075 Las Palmas Dr. - Carlsbad, CA 92009-1 576 - (61 9) 438-11 61 - FAX (61 9) 438-0894 @
If Mr. Vernon needs further clarification on what these items mean, please have him
give me a call at 438-1 161 Ext 4362 and I will be happy to discuss them. with him.
Thank you for your time and patience in resolving this matter.
Respectfully,
Assistant City Engineer
cc City Engineer
Assistant Planning Director
Planning Technician II - Lynch