Point Happy TR 31348 BCPR2022-0003 - Geotechnical Reportt
MADISON DEVELOPMENT
71-361 SAN GORGONIO ROAD
RANCHO MIRAGE, CALIFORNIA 92270-4141
BCPR2022-0003
CITY OF LA QUINTA
BUILDING DIVISION
REVIEWED FOR
CODE
COMPLIANCES
DATE07/18/2022 BY ,1 F
POINT HAPPY / TRACT
CONSTRUCTION PLANS -
SFDx3
GEOTECHNICAL ENGINEERING REPORT
POINT HAPPY RANCH
WEST OF WASHINGTON STREET
SOUTH OF HIGHWAY 111
LA QUINTA, CALIFORNIA
September 26, 2003
02003 Earth Systems Southwest
Unauthorized use or copying of this document is strictly prohibited
without the express written consent of Earth Systems Southwest.
File No.: 09026-02
03-09-818
SUMMARY OF RECOMMENDATIONS
i
Design Item Recommended Parameter Reference Section No.
Foundations
Allowable Bearing Pressure
Continuous wall footings 1,500 psf 5.4
Pad (Column) footings 2,000 psf
Foundation Type Spread Footing 5.4
Bearing Materials Engineered fill
1 Allowable Passive Pressure 300 pcf 5.4
Allowable Coefficient of Friction 0.40 5.4
!, Post -Grading
Soil Expansion Potential Very Low 3.1
Geologic Hazards & Seismic
Liquefaction Potential Negligible 3A.2
Significant Fault and Magnitude San Andreas, M 7.7 3.4.3
Fault Type A 3.4.3
Seismic Zone 4 3.4.3
Soil Profile Type So 3.4.3
Near -Source Distance 12.8 km 3.4.3
Seismic Coefficient, NA 1.00 3.4.3
Seismic Coefficient, Nv 1.09 3.4.3
Pavement
TI equal to 5.0 (Light Traffic) 3.0" AC / 4.0" AB 5.7
TI equal to 7.0 (Heavy Traffic) 4.0" AC / 7.0" AB 5.7
Slabs
Building Floor Slabs On engineered fill 5.5
Modulus of Subgrade Reaction 200 pci 5.5
Existing Site Conditions
Existing Fill Along existing roads
Soil Corrosivity low sulfates
low chlorides 5.6
Groundwater Depth >50 feet 3.2
Estimated Fill and Cut (into soil) 5 feet fill
(includes overexcavation) 5 feet -,cut (into soil) 1.1
The recommendations contained within this report are subject to the limitations presented in
Section 6 of this report. We recommend that all individuals using this report read the limitations.
& Deterministic Estimates or Mean Feak Ground Acceleration (PGA)
Maximum Avg Avg Mean
Fault Name Or Distance Fault Magnitude Slip Return Fault Site
Seismic Zone from Site Type Mmax Rate Period Length PGA
i
(mi) (lon) (Mw) (mn✓Yr) (Yrs) (k.) (g)
Ll Reference Notes: (1)(2) (3) (4) (2) (2) (2) 5)
San Andreas - Southern 15.3 24.6 SS A 7.7 24 220 199 0.24
'I San Andreas - Mission Crk. Branch 25.2 40.6 SS A 7.2 25 220 95 0.12
San Andreas - Banning Branch 25.2 40.6 SS A 7.2 10 220 98 0.12
San Jacinto-Anza 7.9 12.8 SS A 7.2 12 250 91 0.31
San Jacinto -Coyote Creek 12.0 19.3 SS B 6.8 4 175 41 0.19
Burnt Mtn. 37.9 60.9 SS B 6.5 0.6 5000 21. 0.05
Eureka Peak 38.7 62.3 SS B 6.4 0.6 5000 19 0.05
Pinto Mountain 48.8 78.5 SS B 7.2 2.5 499 74 0.06
San Jacinto - Borrego 15.5 24.9 SS B 6.6 4 175 29 0.14
Emerson So. - Copper Mtn. 50.6 81.5 SS B 7.0 0.6 5000 54 0.05
Landers 52.9 85.2 SS B 7.3 0.6 5000 83 0.06
San Jacinto -San Jacinto Valley 48.0 77.2 SS B 6.9 12 83 43 0.05
Pisgah -Bullion Mtn. -Mesquite Lk 50.2 80.8 SS B 7.3 0.6 5000 89 0.06
Earthquake Valley 27.6 44.4 SS B 6.5 2 351 20 0.07
North Frontal Fault Zone (East) 58.9 94.8 DS B 6.7 0.5 1727 27 0.04
Brawley Seismic Zone 27.5 44.2 SS B 6.4 25 24 42 0.07
Elsinore -Julian 32.2 51.8 SS A 7.1 5 340 76 0.09
Elsinore -Temecula 48.5 78.0 SS B 6.8 5 240 43 0.05
Elmore Ranch 32.0 51.6 SS B 6.6 1 225 29 0.07
Elsinore -Coyote Mountain 33.5 53.9 SS B 6.8 4 625 39 0.07
Superstition Mtn. (San Jacinto) 33.1 53.3 SS B 6.6 5 500 24 0.06
Superstition Hills (San Jacinto) 34.3 55.3 SS B 6.6 4 250 23 0.06
Weinert (Superstition Hills) 46.9 75.5 SS C 6.6 4 250 22 0.04
Imperial 49.7 80.0 SS A 7.0 20 79 62 0.05
Brawley 51.6 83.1 SS A 7.0 20 79 62 0.05
Laguna Salada 51.1 82.2 SS B 7.0 3.5 336 67 0.05
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SM SILTY SAND: grayish olive, dry, fine grained
thin brown staimng grayish decomposed vegetation
2 4 5 _ 88 2 fine grained, some orange staining -
5 3 5 6 sn4m41. 89 z SILTY SAND TO SANDY SILT: loose, dry,
becomes slightly more fine grained
refusal
10 Total Depth 7.5 feet
Bedrock encountered at feet, refusal
15
20
25
30
35
40
45
50
55,
- 60
SM/MI,.. SILTY SAND TO SANDY SILT: grayish olive,
medium dense, dry, very fine grained, trace mica
7,8,9 84 1
4,5,8 SM 92 2 SILTY SAND: medium dense, dry, trace coarse
grained in thin layer, trace roots to 1/16" diameter
4 8 72 92 6 grayish olive, fine grained, trace thin roots to 1/16"
diameter
ML SILT: moderate olive brown, dense, dry, very fine
9,10,12 SM grained, non plastic, few clay lamintations, trace
roots to 1/16" diameter
SILTY SAND: grayish olive, dry, fine grained, with
gravel
bedrock encountered, refusal
Total Depth 17. feet
No groundwater encountered
SM/ML SILTY SAND TO SANDY SILT: grayish olive,
4,7,8 94 9 loose, damp, fine grained,.trace roots to 1/16"
3,4,5 ML 83 24 diameter
3,5,6 SM/ML 94 10 SILT: moderate olive brown, stiff, very fine
grained, trace mica, trace clay
SILTY SAND TO SANDY SILT: grayish olive,
93 21 loose, damp, fine grained, trace very thin clay
4,8,9 IaminaCong,non 1 ,tic
some c�aa y lyers tgtrace roots to 1/8" diameter
SM SILTY SAND: grayish olive, loose, damp, fine
grained
4,4,5
6,8,10 jbi ML SILT: moderate olive brown, moist, very fine
grained, non plastic, silt laminations
Total Depth 21.5 feet No groundwater encountered
V SM SILTY SAND: grayish olive, loose, damp, fine
3,5,6 92 9 grained
3,5,7 93 8
5
3,4,4 96 6
10 ML SILT: grayish olive, medium dense, damp, very fine
5,7,7 105 7 grained, trace roots to 1/4" diameter, some clay
layers to I to 2" thick
15 SM/ML SILTY SAND TO SANDY SILT: grayish olive,
3,5,7 medium dense, damp, very fine to fine grained
SM SILTY SAND: medium dense, damp
20
5,9,11
Total Depth 21.5 feet
25 No groundwater encountered
30
35
40
45
50
55
- 60
sM SILTY SAND: moderate olive brown, medium
5,10,12 709 a dense, damp, fine grained, trace roots to 1/8"
diameter
4,7,9 94 4 grayish olive
5
5,7,10 84 23
10 sr-SM SAND WITH SILT: light olive gray, medium
6,10,12 102 6 dense, damp, fine to medium grained, trace coarse
grained
SM
- 15 SILTY SAND: grayish olive, medium dense, damp,
7 13 19 fine grained, trace clay and silt lenses to 1/2" thick
20 Total Depth 16.5 feet
No groundwater encountered
25
30
35
40
45
50
- 55
- 60