HomeMy WebLinkAboutCT 98-21; Seaview; Tentative Map (CT) (18)Memorandum
TO: Assistant Planner, Barbara Kennedy
FROM: Associate Engineer, Clyde Wickham
DATE: March 30, 1999
RE: CT 98 - 21 / SDP 98 - 24 / HDP 98 - 23: SEA VIEW
Engineering Department staff has completed a 2nd review of the above-referenced project for
engineering issues of concern. Engineering issues which need to be resolved or adequately
addressed prior to staff making a determination on the proposed project are as follows:
General:
• The proposed subdivision will be responsible to obtain storm drain easement to serve this
project. The proposed 10' wide storm drain easement is sufficient for a private system.
Please obtain letter of support or confirmation that the proposed plan is acceptable from the
affected property owner.
Grading & Drainage:
• The proposed grading could be reduced if stepped pads were used for lots 1,2 & 3.
Using steps would reduce the 15' slope along the rear of this project and fit the existing
terrain a lot better. The existing terrain is gentle sloped to the west. It contrast, the
proposed slope will change the character and terrain considerably.
• The proposed typical drainage detail on sheet 1 applies to lots 1,2 & 3. The majority of
the lots drain to the street, contrary to the typical. Also the 5' minimum distance shown
in detail, from house to flow line should be maintained. A detail of the typical drainage
pattern at the narrow portion of side-yard should be shown. This issue applies to every
lot as proposed.
• Lot 7 as shown drains onto lot 6.
Attached is a red-lined check print of the proposed project for the applicants use in making
the requested revisions. This check print must be returned with the project revisions
to facilitate continued staff review.
If you or the applicant have any questions, please contact me at extension 4353.
CLYDE WICKHAM
Associate Engineer
Land Development Division
SEE TABLE BELOW FOR L VALUES
TYPE C OR D TERRACE DRAIND TE
75
TYPE B BROW DITCHPER SDRS D-75.
(SEE NOTE 4)
NATURAL GROUND SURFACE
2%
=3
EXISTING GROUND SURFACE
TYPICAL CUT SLOPE
REMOVE SOIL MANTLE
TO COMPETENT MATERIAL
SEE DETAIL A
H IN FEET
0'-5'
5'-20'
20'-40'
OVER 40'
L IN FEET
—
2.5'
5'
10'
NATURAL GROUND SURFACE
FINISHED GRADE
TYPE C OR D TERRACE
DRAIN PER SDRS. D-75
(TYPICAL) (SEE NOTE 4)
SLOPE ROUNDING DETAIL
(DOES NOT APPLY TO SIDE
SLOPES BETWEEN RESIDENTIAL
UNITS)
DETAIL A
10'
BENCH TYPICAL FILL SLOPE
BENCHES REQUIRED FOR
NATURAL GROUND SLOPE
GREATER THAN 5:1
SUBDIVISION
BOUNORY
NOTES
H in feet
less than 10'
10' - 20'
over 20'
a
2'
(H/5)'
4+H/10'(10' MAX)
b
3.5'
4'
H/5'(10'max.)
SETBACKS
1). ALL FILL MUST BE COMPACTED TO A
MINIMUM OF 90% OF THE MAXIMUM
DENSITY WITH THE EXCEPTION OF THE
OUTER 8" OF THE SLOPE SURFACE
WHICH MAY BE GRID ROLLED TO 85%
DENSITY.
2). CUT SLOPES TO 40' REQUIRE NO BENCH.
CUT SLOPES OVER 100' REQUIRE ONE
MIN. 20' BENCH MIDWAY ON SLOPE.
3). FILL SLOPES TO 30' REQUIRE NO BENCH.
FILL SLOPES OVER 100' REQUIRE ONE
MIN. 20' BENCH MIDWAY ON SLOPE.
4). AS MODIFIED BY CITY OF CARLSBAD
ENGINEERING STANDARDS.
APPROVED DATE CITY OF CARLSBAD
GRADING OF SLOPES
AND REQUIRED SETBACKS
DATE
SUPPLEMENTAL
STANDARD NO.
SLOPE
SEE CITY
STD. DWG.
GS-14
PROPERTY LINE
PLAN
NOTES
1). DRAINAGE SHALL BE CONDUCTED TO STREET AS SURFACE FLOW
WHENEVER POSSIBLE.
2). NON-EROSIVE DRAINAGE SURFACE REQUIRED WHERE FLOW IS
COLLECTED.
3). FINISH GRADING SHALL PROVIDE A MINIMUM POSITIVE DRAINAGE OF
2% TO SWALE 5' AWAY FROM THE BUILDING UNLESS SPECIFICALLY
APPROVED OTHERWISE BY THE CITY ENGINEER.(SEE SHEET 2)
4). DRIVEWAYS BETWEEN 14% AND 20% MUST RECEIVE SPECIAL
APPROVAL OF THE CITY ENGINEER. SUBMIT ENGINEERED PROFILE
AND LETTER OF REQUEST TO THE ENGINEERING DEPARTMENT.
SHEET 1 OF 2
REV.APPROVED DATE CITY OF CARLSBAD
TYPICAL FINISHED
LOT GRADING SUPPLEMENTAL
STANDARD NO.