HomeMy WebLinkAboutPD 2023-0008; 3229 HIGHLAND; PERMEABLE PAVEMENT DESIGN RECOMMENDATIONS FOR 3229 HIGHLAND; 2024-01-12geotechnica/ & forensic engineering
John Majocha, PE, QSD
Via e-mail:jmajoc0 l@gmail.com
January 12, 2024
1941-A Friendship Drive
El Cajon, CA 92020
TEL (619) 258-9000
www.applied-consultants.com
Subject: Permeable Pavement Design Recommendations for the Subject Property Located
at 3229 Highland Drive, Carlsbad, CA, 92008
Dear Mr. Majocha,
In accordance with your request, we have prepared this letter to provide additional
permeable pavement design recommendations for the referenced project.
The grading plans for the subject property dated December 26, 2023 prepared by John L.
Majocha P .E. propose gravel pavement and permeable pavers for driveways and hardscape. The
following are our recommendations for permeable pavement design:
a. Driveways and parking
Permeable pavers and gravel pavement system (TRUEGRID) used for the driveway and
parking areas shall be rated for vehicular traffic.
The upper 12 inches of the subgrade soils and the aggregate base shall be compacted to a
minimum of 95 percent relative compaction (ASTM D1557). After compaction of the
subgrade, a layer of geogrid Mirafi 3XT or equivalent installed below the rock storage
section.
The perimeter of the proposed permeable pavement shall be bounded by a concrete curb
with a minimum embedment of 18" below the bottom of the rock storage section.
b. Permeable pavement adjacent to foundations
The proposed foundations adjacent to permeable pavement are suitable provided that the
foundations are extended or cut-off-walls are constructed such that the foundations or cut-
off-walls bottoms extend two feet below the bottom of the base rock storage section. The
positive side of the foundations/structures adjacent to permeable pavers shall be protected
with Miraseal, or equivalent and Miradrain 6200, or equivalent.
The sub grade of the permeable pavement shall be graded a minimum of 5% away from all
structures.
c. Permeable pavement over underground sewer utilities
Sewer pipes located within ten feet of infiltration areas shall be encased with concrete or
steel.
3229 Highland Drive -Penneable Pavement Recommendations
JLVG 1/1 2/2024 Page 1 of2
We appreciate this opportunity to be of service. Should you have any questions, please call our
office at (619) 258-9000.
Sincerely,
Jorge L. Va dez Gonzalez, PE 92051
Project Engineer
3229 Highland Drive -Permeable Pavement Recommendations
JLVG 1/12/2024 Page 2 of2