HomeMy WebLinkAboutCity of Palm Desert Control Network
June 2022
Prepared for:
The City of Palm Desert
73510 Fred Waring Drive
Palm Desert, CA 92260
Prepared by:
Michael Baker International
75-410 Gerald Ford Drive, Suite 100
Palm Desert, CA 92211
This report was prepared under my direct supervision.
_____________________________________________
Christopher Alberts, PLS 8508
Table of Contents
PLOT OF CURRENT CITY BENCHMARKS ................................................................................................. 2
BENCHMARK SHEETS ............................................................................................................................. 3-46
EXHIBIT “A” STATEMENT OF WORK ................................................................................................. 47-49
EXHIBIT “B” NETWORK TABLE ................................................................................................................ 50
EXHIBIT “C” HISTORICAL NETWORK COMPARISON .................................................................... 51-52
APPENDIX “A” LEGACY CENTERLINE BENCHMARK SHEETS .................................................... 53-56
City of Palm Desert
Control Network Update
7/31/2022
154 144
142
103 104
136
101
145 107106
131128133147
108
161A161
141 114 115 143
129
130R
120
123
137
119
127
122
124 125
126
171
172
118
121 170
105132
134
135
138
139
140
162
157
156
0 1.5 30.75
Miles
PALM DESERT BENCHMARK NETWORK
CLICK SYMBOL TO NAVIGATE TO INDIVIDUAL RECOVERY SHEET
Legend
Legacy Centerline
Benchmarks
Benchmark
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
679711.329
1988799.921
Combined Factor:
6524921.07
0.99997939
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
231.59
Survey By
MBI
Monument Photo
PO
R
T
O
L
A
A
V
E
GERALD FORD DR
101
City of Palm Desert Bench Mark No. 101
Brass Disk
Punch
2 in
0 160 Feet
33° 47' 13.26815" N
116° 22' 15.36157" W
123.99
2230019.59
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.60
Meters
70.589
Point Number: 101
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SW corner of Portola Ave. and Gerald Ford Dr., NW corner
of catch basin, south of southerly ECR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
678090.188
1990174.027
Combined Factor:
6529429.29
0.99997663
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
247.89
Survey By
MBI
Monument Photo
CYPRESS POINT DR
OA
K
M
O
N
T
D
R
CO
O
K
S
T
FRANK SINATRA DR
103
City of Palm Desert Bench Mark No. 103
Brass Disk
Cross
2 in
0 160 Feet
33° 46' 20.69966" N
116° 21' 21.88420" W
140.19
2224700.89
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.70
Meters
75.557
Point Number: 103
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SW corner of Cook St. and Frank Sinatra Dr., on top of CB,
5.5 ft south of southerly ECR, 1.2 ft west of curb face,
flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
678135.177
1992040.871
Combined Factor:
6535554.09
0.99998113
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
155.12
Survey By
MBI
Monument Photo
FRANK SINATRA DR
TA
M
A
R
I
S
K
R
O
W
D
R
CROCUS LN
104
City of Palm Desert Bench Mark No. 104
Brass Disk
Cross
2 in
0 160 Feet
33° 46' 22.21566" N
116° 20' 09.33120" W
47.25
2224848.49
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.86
Meters
47.280
Point Number: 104
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
North side of Tamarisk Row Dr., 771.5 ft east of Eldorado
Dr., at SE corner of catch basin, 1.2 ft north of curb face,
flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/06/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
676450.963
1988525.999
Combined Factor:
6524022.38
0.99997501
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1.5 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
241.00
Survey By
MBI
Monument Photo
PO
R
T
O
L
A
A
V
E
COUNTRY CLUB DR
AC
A
P
U
L
C
O
D
R
105
City of Palm Desert Bench Mark No. 105
Brass Disk
Cross
2 in
0 160 Feet
33° 45' 27.43652" N
116° 22' 25.85872" W
133.54
2219322.87
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.47
Meters
73.458
Point Number: 105
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SW corner of Portola Ave. and Country Club Dr., 47.6 ft
south of southerly ECR, at the southerly end of catch
basin, 1.35 ft west of CF, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
676489.037
1991801.450
Combined Factor:
6534768.59
0.99997618
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
217.99
Survey By
MBI
Monument Photo
N
A
R
C
I
S
S
U
S
W
A
Y
BOUQUET
CANYON DR
B
L
U
E
R
I
V
E
R
D
R
BR
I
G
H
T
R
O
C
K
D
R
EL
D
O
R
A
D
O
D
R
BIRD RAIN CIR
HONEYSUCKLE DR
COUNTRY CLUB DR 106
City of Palm Desert Bench Mark No. 106
Brass Disk
Cross
2 in
0 160 Feet
33° 45' 28.78051" N
116° 20' 18.58201" W
110.18
2219447.78
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.81
Meters
66.444
Point Number: 106
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SE corner of Eldorado Dr. and Country Club Dr., on top of
curb, 6.3 ft east of ECR
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/06/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
676497.572
1993385.380
Combined Factor:
6539965.20
0.99998011
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
136.11
Survey By
MBI
Monument Photo
BO
X
C
A
N
Y
O
N
T
R
L
TA
M
A
R
I
S
K
RO
W
D
R
PRESTON TRL
OA
S
I
S
C
L
U
B
D
R
COUNTRY CLUB DR
107
City of Palm Desert Bench Mark No. 107
Brass Disk
Cross
2 in
0 160 Feet
33° 45' 29.09695" N
116° 19' 17.03335" W
28.15
2219475.78
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.95
Meters
41.486
Point Number: 107
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SW corner of Oasis Club Dr. and Country Club Dr., on top
of curb, 5.15 ft south of ECR
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
675889.824
1987685.915
Combined Factor:
6521266.21
0.99997638
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1.5 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
198.71
Survey By
MBI
Monument Photo
CA
B
A
N
A
C
T
HOVLEY LN
BA
R
A
N
D
A
C
T
TERRAZA DR
CO
R
T
E
P
L
A
C
I
T
A
S
AV
E
N
I
D
A
S
O
L
A
N
A
AV
E
N
I
D
A
R
O
S
A
R
I
O
108
City of Palm Desert Bench Mark No. 108
Brass Disk
Cross
2 in
0 160 Feet
33° 45' 09.19002" N
116° 22' 58.47498" W
91.38
2217481.86
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.33
Meters
60.568
Point Number: 108
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
North side of Hovley Ln. W., 0.5 miles east of Monterey
Ave., 33 ft east of northerly prod of Avenida Solana
centerline to south, on top of curb, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
673225.583
1988522.271
Combined Factor:
6524010.15
0.99997406
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
185.02
Survey By
MBI
Monument Photo
SANTA
ROSA WAY
OL
I
V
E
CT
OL
I
V
E
CT
PO
R
T
O
L
A
A
V
E
GOLETA AVE
FRED WARING DR
114
City of Palm Desert Bench Mark No. 114
Brass Disk
Cross
2 in
0 160 Feet
33° 43' 42.74981" N
116° 22' 25.85468" W
77.82
2208740.93
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.20
Meters
56.394
Point Number: 114
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SW corner of Portola Ave. and Fred Waring Dr., at the
southerly end of CB, 23.3 ft south of ECR, 1.1 ft west of
curb face, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
673272.858
1990122.479
Combined Factor:
6529260.17
0.99997501
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
166.50
Survey By
MBI
Monument Photo
SAN YSID
R
O
C
I
R
ER
I
E
C
T
S
U
P
E
R
I
O
R
C
T
SA
N
YS
I
D
R
O
CI
R
LA SIERRA DR
CO
O
K
S
T
LAKE
S
I
D
E
D
R
FRED WARING DR
115
City of Palm Desert Bench Mark No. 115
Brass Disk
Cross
2 in
0 160 Feet
33° 43' 44.34161" N
116° 21' 23.69622" W
59.07
2208896.03
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.42
Meters
50.748
Point Number: 115
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NW corner of Cook St. and Fred Waring Dr., on top of
curb, 9.6 ft west of ECR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/05/2022
Depth: 0
Setting: Structure
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
672879.313
1986027.872
Combined Factor:
6515826.44
0.99997209
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
218.05
Survey By
MBI
Monument Photo
H
W
Y
1
1
1
118
Brass Disk
Cross
2 in
0 160 Feet
33° 43' 31.40423" N
116° 24' 02.73056" W
111.27
2207604.88
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.78
Meters
66.462
Point Number: 118
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SE corner of concrete bridge on HWY 111 over Palm
Valley Stormwater Channel, at the east end of conc stem
wall, flush with top of wall
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Structure
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
672450.560
1987692.595
Combined Factor:
6521288.12
0.99997122
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
226.73
Survey By
MBI
Monument Photo
LA
S
P
A
L
M
A
S
A
V
E
SA
N
P
A
B
L
O
A
V
E
SU
N
L
O
D
G
E
L
N
HWY 111
119
City of Palm Desert Bench Mark No. 119
Brass Disk
Cross
2 in
0 160 Feet
33° 43' 17.56151" N
116° 22' 58.04526" W
119.74
2206198.21
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.99
Meters
69.109
Point Number: 119
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NE corner of San Pablo and HWY 111 on top of conc drain
structure (2 ft above grade), 4.4 ft SW of NE side, 5.5 ft
NW of curb
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
672395.785
1989536.725
Combined Factor:
6527338.40
0.99997195
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
210.70
Survey By
MBI
Monument Photo
PALM DESERT DR
HWY 111
SH
A
D
O
W
H
I
L
L
S
R
D
120
City of Palm Desert Bench Mark No. 120
Brass Disk
Cross
2 in
0 160 Feet
33° 43' 15.85418" N
116° 21' 46.41316" W
103.46
2206018.50
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.25
Meters
64.223
Point Number: 120
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
South side of Palm Desert Dr. South, 302 ft east of
centerline of Shadowhills Rd. on top of curb east side of
driveway to "Del Taco" outlet, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/06/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
671663.477
1988542.636
Combined Factor:
6524076.97
0.99996832
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
270.19
Survey By
MBI
Monument Photo
PO
R
T
O
L
A
A
V
E
FAIRWAY DR
MO
U
N
T
A
I
N
VI
E
W
A
V
E
OLD PROSPECTOR TRL
121
City of Palm Desert Bench Mark No. 121
Brass Disk
Cross
2 in
0 160 Feet
33° 42' 52.04882" N
116° 22' 24.99166" W
163.18
2203615.92
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.01
Meters
82.355
Point Number: 121
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SE corner of Portola Ave. and Fairway Dr. on top of curb,
5.5 ft south of southerly BCR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/04/2022
Depth: 0
Setting: Concrete
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
671236.994
1987656.882
Combined Factor:
6521170.95
0.99996454
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
339.71
Survey By
MBI
Monument Photo
RY
W
A
Y
P
L
AM
I
R
D
R
GRAPEVINE ST
122
City of Palm Desert Bench Mark No. 122
Brass Disk
Cross
2 in
0 160 Feet
33° 42' 38.17089" N
116° 22' 59.37222" W
232.89
2202216.70
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.82
Meters
103.544
Point Number: 122
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NW corner of Ryway Pl. and Grapevine St, 64.7 ft west of
center of Ryway Pl., at the NE corner of catch basin, north
side of low conc black wall, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
670366.491
1986323.513
Combined Factor:
6516796.39
0.99995475
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1.5 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
525.22
Survey By
MBI
Monument Photo
PI
N
E
S
T
O
P
A
L
M
S
H
W
Y
CHAPEL
HILL RD
CALLIANDRA
ST
LO
T
U
S
CT
HAYSTACK RD
SOMERA RD
123
City of Palm Desert Bench Mark No. 123
Brass Disk
Cross
2 in
0 160 Feet
33° 42' 09.85834" N
116° 23' 51.10862" W
418.77
2199360.73
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.45
Meters
160.087
Point Number: 123
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
West side of HWY 74, south of T intersection with
Haystack Rd. on top of conc curb, 4 ft south of signal
pole, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
670377.140
1987324.335
Combined Factor:
6520079.92
0.99995826
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
452.44
Survey By
MBI
Monument Photo
CA
L
I
C
O
CA
C
T
U
S
L
N
MA
R
L
B
O
U
R
O
D
R
CALLIANDRA ST
HAYSTACK RD
124
City of Palm Desert Bench Mark No. 124
Brass Disk
Cross
2 in
0 160 Feet
33° 42' 10.24825" N
116° 23' 12.24359" W
345.81
2199395.67
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.63
Meters
137.903
Point Number: 124
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
North side of Haystack Rd., 5 ft east of northerly prod of
centerline of Chia Dr., at the westerly end of catch basin,
1.0 ft north of curb face, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
670322.106
1988445.713
Combined Factor:
6523758.98
0.99996256
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
361.60
Survey By
MBI
Monument Photo
SA
Q
U
A
R
O
C
T
PO
R
T
O
L
A
A
V
E
HAYSTACK R
D
125
City of Palm Desert Bench Mark No. 125
Brass Disk
Cross
2 in
0 160 Feet
33° 42' 08.50760" N
116° 22' 28.69377" W
254.80
2199215.11
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.81
Meters
110.217
Point Number: 125
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
West side of Portola Ave. between Haystack Rd. and
Silver Spur Tr., at the northerly end of CB, 1.2 ft west of
curb face, 3.2 ft south of ECR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/04/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
669505.638
1987301.203
Combined Factor:
6520004.03
0.99995291
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
545.87
Survey By
MBI
Monument Photo
AJO
L
N
SILV
E
R
SPU
R
T
R
L
Q
U
E
R
C
U
S
L
N
PORT
O
L
A
A
V
E
BOXT
H
O
R
N
L
N
ME
S
A
V
I
E
W
D
R
126
City of Palm Desert Bench Mark No. 126
Brass Disk
Cross
2 in
0 160 Feet
33° 41' 41.96049" N
116° 23' 13.09744" W
439.39
2196536.42
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.48
Meters
166.381
Point Number: 126
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SW corner of Porola Ave. and Mesa View Dr., on top of
conc curb, 6 ft south of ECR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
667560.009
1985396.935
Combined Factor:
6513756.45
0.99993411
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
898.71
Survey By
MBI
Monument Photo
KIVA
D
R
MES
Q
U
I
T
E
H
I
L
L
S
PI
N
E
S
T
O
P
A
L
M
S
H
W
Y
PALO
W
E
T
D
R
127
City of Palm Desert Bench Mark No. 127
Brass Disk
Cross
2 in
0 160 Feet
33° 40' 38.72272" N
116° 24' 26.92642" W
792.96
2190153.13
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-105.75
Meters
273.926
Point Number: 127
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
West side of HWY 74, south of Palowet Dr., at the
southerly end of catch basin, 1.1 ft west of curb face,
24.6 ft south of ECR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
674883.607
1993299.537
Combined Factor:
6539683.56
0.99997584
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
186.79
Survey By
MBI
Monument Photo
HOVLEY LN
OA
S
I
S
C
L
U
B
D
R
T
U
R
Q
U
E
R
I
E
S
A
V
E
MO
R
O
C
C
O
R
D
TURENDOT RD
FIRE DANCE LN
128
City of Palm Desert Bench Mark No. 128
Brass Disk
Cross
2 in
0 160 Feet
33° 44' 36.71047" N
116° 19' 20.32559" W
78.90
2214180.63
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.89
Meters
56.934
Point Number: 128
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
South side of Hovley Lane East, 302 ft. west of centerline
of Oasis Club Dr. on top of curb, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
673873.411
1994995.993
Combined Factor:
6545249.36
0.99997677
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
144.18
Survey By
MBI
Monument Photo
SE
D
O
N
A
C
T
WA
S
H
I
N
G
T
O
N
S
T
TUCSON CIR
129
City of Palm Desert Bench Mark No. 129
Brass Disk
Cross
2 in
0 160 Feet
33° 44' 03.95572" N
116° 18' 14.39475" W
36.15
2210866.35
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-108.03
Meters
43.946
Point Number: 129
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
Westerly side of Washington St., 45 ft southerly of
centerline prod of Darby Rd., on conc curb, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
673285.489
1994957.497
Combined Factor:
6545123.05
0.99997629
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
140.64
Survey By
MBI
Monument Photo
WA
S
H
I
N
G
T
O
N
S
T
VIA
GIBRALTA
R
EM
E
R
A
L
D
D
R
FRED WARING DR
130R
City of P.D. BM No. 130-R
Brass Disk
Cross
2 in
0 160 Feet
33° 43' 44.87273" N
116° 18' 15.87835" W
32.65
2208937.47
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-108.00
Meters
42.868
Point Number: 130R
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NW corner of Washington St. and Fred Waring Drive., 85
ft. west of westerly ECR, at the SW corner of catch basin,
flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
674843.079
1994998.468
Combined Factor:
6545257.47
0.99997899
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
120.33
Survey By
MBI
Monument Photo
WA
S
H
I
N
G
T
O
N
S
T
42ND AVEHOVLEY LN
131
City of Palm Desert Bench MarkNo. 131
Brass Disk
Cross
2 in
0 160 Feet
33° 44' 35.42846" N
116° 18' 14.31810" W
12.27
2214047.67
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-108.06
Meters
36.676
Point Number: 131
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SW corner of Washington St. and Hovley Ln. East, 79 ft
south of ECR, on top of curb, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/06/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
676467.575
1986949.906
Combined Factor:
6518851.48
0.99997576
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
225.53
Survey By
MBI
Monument Photo
COUNTRY CLUB DR
MO
N
T
E
R
E
Y
A
V
E
MO
N
T
E
R
E
Y
A
V
E
132
City of Palm Desert Bench Mark No. 132
Brass Disk
Cross
2 in
0 160 Feet
33° 45' 27.91074" N
116° 23' 27.10360" W
118.26
2219377.37
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.28
Meters
68.743
Point Number: 132
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SE corner of Monterey Ave. and Country Club Dr., on top
of curb, 2 ft east of ECR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
674893.238
1990138.498
Combined Factor:
6529312.72
0.99997569
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1.5 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
189.73
Survey By
MBI
Monument Photo
GR
E
E
N
WA
Y
MAYFAIR DR
CO
O
K
S
T
42ND AVE
133
City of Palm Desert Bench Mark No. 133
Brass Disk
Cross
2 in
0 160 Feet
33° 44' 36.93513" N
116° 21' 23.13819" W
82.17
2214212.23
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.55
Meters
57.828
Point Number: 133
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NW corner of Cook St. and 42nd Ave. at the SE corner of
catch basin, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/04/2022
Depth: 0
Setting: Concrete
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
681509.850
1987185.380
Combined Factor:
6519624.03
0.99998153
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
234.01
Survey By
MBI
Monument Photo
MO
N
T
E
R
E
Y
A
V
E
134
City of Palm Desert Bench Mark No. 134
Brass Disk
Cross
2 in
0 160 Feet
33° 48' 11.57689" N
116° 23' 18.21357" W
126.54
2235920.23
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.47
Meters
71.328
Point Number: 134
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
Westerly side of Monterey Ave., 388 ft north of BCR,
north of Dinah Shore Dr., 10 ft west of curb face, NW
corner of electrical vault, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
680831.607
1988077.537
Combined Factor:
6522551.05
0.99998245
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
196.83
Survey By
MBI
Monument Photo
SP
Y
D
E
R
C
I
R
DI
N
A
H
S
H
O
R
E
D
R
135
City of Palm Desert Bench Mark No. 135
Brass Disk
Cross
2 in
0 160 Feet
33° 47' 49.60053" N
116° 22' 43.49528" W
89.28
2233695.03
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.55
Meters
59.993
Point Number: 135
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SW corner of Spyder Circle and Dinah Shore Dr., 16 ft
southerly of northerly ECR, 4 ft westerly of curb face, NW
corner of top catch basin, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
679156.857
1990191.511
Combined Factor:
6529486.65
0.99998176
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
167.78
Survey By
MBI
Monument Photo
CO
O
K
S
T
GERALD FORD DR
136
City of Palm Desert Bench Mark No. 136
Brass Disk
Punch
2 in
0 160 Feet
33° 46' 55.32092" N
116° 21' 21.24681" W
60.07
2228200.45
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.72
Meters
51.141
Point Number: 136
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NW corner of Cook St. and Gerald Ford Dr., NW corner of
catch basin north of Gerald Ford Dr., flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
669204.660
1986044.576
Combined Factor:
6515881.25
0.99994585
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
686.95
Survey By
MBI
Monument Photo
PI
N
E
S
T
O
P
A
L
M
S
H
W
Y
INDIAN
HILLS WAY
ROLLING KNOLL DR
H
O
R
I
Z
O
N
L
N
STARBURST
DR
CAN
Y
O
N
C
R
E
S
T
L
N
FR
O
N
T
A
G
E
R
D
ANDRE
A
S
C
A
N
Y
O
N
D
R
137
City of Palm Desert Bench Mark No. 137
Brass Disk
Cross
2 in
0 160 Feet
33° 41' 32.13523" N
116° 24' 01.87565" W
580.76
2195548.95
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.20
Meters
209.384
Point Number: 137
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
South side of Indian Hills Way, east of HWY 74 on top of
curb, 25.5 ft easterly of westerly P.C. for turn lane, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
674895.344
1991800.602
Combined Factor:
6534765.81
0.99997420
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
221.14
Survey By
MBI
Monument Photo
HO
G
A
N
D
R
GOLD CANYON DR
S
N
O
W
C
R
E
E
K
C
A
N
Y
O
N
ARMOUR
WAY
V
I
A
T
O
S
C
A
N
A
VIA SO
V
A
N
A
VI
A
S
T
I
A
EL
D
O
R
A
D
O
D
R
HOVLEY LN
138
City of Palm Desert Bench Mark No. 138
Brass Disk
Punch
2 in
0 160 Feet
33° 44' 37.05391" N
116° 20' 18.56237" W
113.41
2214219.14
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.74
Meters
67.404
Point Number: 138
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NE corner of Eldorado Dr, and Hovley Lane East, 15 ft
easterly of westerly BCR, 3 ft north of curb face top of
catch basin, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
672306.355
1986940.474
Combined Factor:
6518820.54
0.99997017
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
245.51
Survey By
MBI
Monument Photo
P
I
N
E
S
T
O
P
A
L
M
S
H
W
Y
FR
O
N
T
A
G
E
R
D
EL PASEO
OC
O
T
I
L
L
O
D
R
PALM
DESE
R
T
D
R
139
City of Palm Desert Bench Mark No.139
Brass Disk
Punch
2 in
0 160 Feet
33° 43' 12.84898" N
116° 23' 27.25157" W
138.66
2205725.10
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.85
Meters
74.831
Point Number: 139
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
Westerly side of HWY 74, 176 ft northerly of BCR for El
Paseo, 3.8 ft west of curb face, top of catch basin, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
676534.985
1995012.105
Combined Factor:
6545302.22
0.99998138
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
110.61
Survey By
MBI
Monument Photo
DE
S
E
R
T
CO
U
N
T
R
Y
C
I
R
COUNTRY CLUB DR
WA
S
H
I
N
G
T
O
N
S
T
140
City of Palm Desert Bench Mark No. 140
Brass Disk
Punch
2 in
0 160 Feet
33° 45' 30.34298" N
116° 18' 13.82223" W
2.53
2219598.53
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-108.08
Meters
33.713
Point Number: 140
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NW corner of Desert Country Circle and Country Club Dr.,
17.6 ft northerly of BCR, 4.25 ft west of curb face, top of
catch basin, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
673433.894
1987852.244
Combined Factor:
6521811.90
0.99997426
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
185.44
Survey By
MBI
Monument Photo
SA
N
P
A
B
L
O
A
V
E
141
City of Palm Desert Bench Mark No. 141
Brass Disk
Cross
2 in
0 160 Feet
33° 43' 49.48443" N
116° 22' 51.89218" W
78.31
2209424.37
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.13
Meters
56.522
Point Number: 141
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
Easterly end of parking stalls at City of P.D. parking lot on
top of southerly end of catch basin, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
679768.136
1987226.928
Combined Factor:
6519760.35
0.99997529
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
318.39
Survey By
MBI
Monument Photo
MO
N
T
E
R
E
Y
A
V
E
VICTOR HUGO RD
LY
O
N
R
D
GERALD FORD DR
142
City of Palm Springs Bench Mark No. 142
Brass Disk
Punch
2 in
0 160 Feet
33° 47' 15.04851" N
116° 23' 16.50868" W
210.94
2230205.96
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.45
Meters
97.046
Point Number: 142
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NE corner of Monterey Ave. and Gerald Ford Dr., 23.5 ft
north of the ECR and 3.6 ft of curb face
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/03/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
673292.830
1992628.555
Combined Factor:
6537482.18
0.99997539
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
159.43
Survey By
MBI
Monument Photo
FRED WARING DR
CA
L
I
F
O
R
N
I
A
A
V
E
VIA
O
R
V
I
E
T
O
FLORIDA AVE
143
City of Palm Desert Bench Mark No.143
Brass Disk
Cross
2 in
0 160 Feet
33° 43' 45.06244" N
116° 19' 46.34735" W
51.70
2208961.56
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.72
Meters
48.594
Point Number: 143
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SE corner of catch basin on easterly side of California Dr.
3.4 ft north of ECR
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/04/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
678087.181
1988827.633
Combined Factor:
6525011.99
0.99997538
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1.5 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
273.75
Survey By
MBI
Monument Photo
PELE PL
PO
R
T
O
L
A
A
V
E
FRANK SINATRA DR
144
City of Palm Desert Bench Mark No. 144
Brass Disk
Cross
2 in
0 160 Feet
33° 46' 20.55458" N
116° 22' 14.21133" W
166.18
2224691.03
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.57
Meters
83.440
Point Number: 144
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SE corner of Portola Ave. and Frank Sinatra Dr., NE corner
of CB, south of southerly BCR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/06/2022
Depth:
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
676525.164
1990134.095
Combined Factor:
6529298.28
0.99997464
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
250.79
Survey By
MBI
Monument Photo
PO
T
E
N
Z
A
CIR
CO
O
K
S
T
COUNTRY CLUB DR
145
156
City of Palm Desert Bench Mark No. 145
Brass Disk
Punch
2 in
0 160 Feet
33° 45' 29.90251" N
116° 21' 23.37402" W
143.15
2219566.31
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.64
Meters
76.441
Point Number: 145
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NW corner of Cook St. and Country Club Dr., NW corner
of catch basin, north of northerly BCR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
674973.063
1988544.722
Combined Factor:
6524083.81
0.99997598
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
185.43
Survey By
MBI
Monument Photo
CHAPAR
R
A
L
D
R
VIA
PELLESTRINA
V
I
A
A
R
E
G
I
O
C
A
M
I
N
O
A
R
R
O
Y
O
S
VIA
V
E
N
E
Z
I
A
PO
R
T
O
L
A
A
V
E
CA
M
I
N
O
A
R
R
O
Y
O
N
147
City of Palm Desert Bench Mark No. 147
Brass Disk
Cross
2 in
0 160 Feet
33° 44' 39.46895" N
116° 22' 25.06308" W
78.06
2214474.12
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.37
Meters
56.519
Point Number: 147
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
Easterly side of Portola Ave., top of southerly end of catch
basin north of Via Venezia (private gate entrance), flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 04/04/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
678095.233
1986985.217
Combined Factor:
6518967.33
0.99997492
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
283.49
Survey By
MBI
Monument Photo
DES
E
R
T
GRE
E
N
S
DR
W
R
E
A
Z
O
R
P
L
DESER
T
GREEN
S
D
R
N
MO
N
T
E
R
E
Y
A
V
E
FRANK SINATRA DR 154
LS 4146 BM 1987
Brass Disk
Punch
2 1/2 in
0 160 Feet
33° 46' 20.74103" N
116° 23' 25.81669" W
176.12
2224717.44
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.37
Meters
86.408
Point Number: 154
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SE corner of Monterey Ave. and Frank Sinatra Dr., on conc
curb, 2.4 ft east of ECR, flush
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Concrete
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
Combined Factor:
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
192.47
Survey By
MBI
Monument Photo
AVENIDA LAS PALMAS GRAN VIA
DU
R
A
N
G
O
D
R
P
A
L
O
M
A
S
D
R
MO
N
T
E
R
E
Y
A
V
E
G
I
R
A
L
D
A
C
I
R
CA
S
T
E
L
L
A
N
A
W
E
T
O
R
R
E
M
O
L
I
N
O
S
D
R
161A
161
RM 25 92
Brass Disk
Punch
2 1/2 in
0 160 Feet
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88Geoid 18Meters
Point Number: 161
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: No
SW corner of Monterey Ave. and Rancho Las Palmas
(private gate), in base of street light
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/02/2022
Depth: 0
Setting: Structure
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
674340.637
1986902.946
Combined Factor:
6518697.41
0.99997493
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
192.33
Survey By
MBI
Monument Photo
AVENIDA LAS PALMAS GRAN VIA
DU
R
A
N
G
O
D
R
P
A
L
O
M
A
S
D
R
MO
N
T
E
R
E
Y
A
V
E
G
I
R
A
L
D
A
C
I
R
CA
S
T
E
L
L
A
N
A
W
E
T
O
R
R
E
M
O
L
I
N
O
S
D
R
161A
161
None
Lead & Tack
Nail
Small
0 160 Feet
33° 44' 18.87450" N
116° 23' 28.81635" W
85.24
2212399.24
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.09
Meters
58.622
Point Number: 161A
Found/Set: FoundJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SW Corner of Monterey Ave. and Rancho Las Palmas
(private gate), NW corner of electrical vault to south of
BM161
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/06/2022
Depth: 0
Setting: Curb
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
671706.131
1990179.619
Combined Factor:
6529447.63
0.99997105
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
214.37
Survey By
MBI
Monument Photo
FA
I
R
W
A
Y
D
R
WI
N
G
F
O
O
T
D
R
CO
R
A
L
GA
B
L
E
S
C
T
VI
N
T
A
G
E
DR
CHIPPEWA DR
HUM
M
I
N
G
B
I
R
D
LN
BORREGO
DR
A
L
G
O
N
Q
U
I
N
C
I
R
CO
O
K
S
T
170157
City of Palm Desert Bench Mark No. 170
Brass Disk
Cross
2 in
0 160 Feet
33° 42' 53.49174" N
116° 21' 21.41474" W
107.12
2203755.86
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-107.25
Meters
65.341
Point Number: 170
Found/Set: SetJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NE corner of Fairway Dr. and Cook St., on conc curb, 51.2
ft east of BCR
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/05/2022
Depth: 0
Setting: Structure
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
671315.390
1986669.743
Combined Factor:
6517932.32
0.99996317
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
369.82
Survey By
MBI
Monument Photo
OC
O
T
I
L
L
O
D
R
SHADOW MOU
N
T
A
I
N
D
R
GRAPEVINE ST
FR
O
N
T
A
G
E
R
D
PI
N
E
S
T
O
P
A
L
M
S
H
W
Y
FR
O
N
T
A
G
E
R
D
171
City of Palm Desert Bench Mark No. 171
Brass Disk
Cross
2 in
0 160 Feet
33° 42' 40.67287" N
116° 23' 37.71409" W
263.15
2202473.91
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.67
Meters
112.722
Point Number: 171
Found/Set: SetJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
SE corner of Shadow Mountain Dr. and HW 74., on conc
curb ECR
RETURN TO NETWORK PLOT
Monument Location
Vicinity MapOverview Photo
Stamping:
Character:
Recovery Date: 05/05/2022
Depth: 0
Setting: Catch Basin
Center Mark:
Size:
California Geodetic Coordinates of 1983 CCS 83, Zone 6 Coordinates NAD83(2017.50)
Notes:
Deg. Min. Seconds
Latitude:
Longitude:
Ellipsoid Height (ftus):
Northing:
Easting:
Meters
673298.252
1986935.578
Combined Factor:
6518804.48
0.99997379
U.S. Survey Feet Epoch:
FGDC Acc.:
Survey By:
Adj. Date:
2017.50
1 cm
MBI
May 2022
California Orthometric Height
Datum
COH88
U.S. Survey Feet
192.16
Survey By
MBI
Monument Photo
AC
A
C
I
A
D
R
MO
N
T
E
R
E
Y
A
V
E
FRED WARING DR
172
162
City of Palm Desert Bench Mark No. 172
Brass Disk
Cross
2 in
0 160 Feet
33° 43' 45.04306" N
116° 23' 27.49385" W
85.18
2208979.35
±
FGDC Acc.
2 cm
Adj. Date
May 2022
COH88
Derived
Geoid 18
-106.98
Meters
58.571
Point Number: 172
Found/Set: SetJob Number: 182189
Benchmark Recovery Sheets
GPS Usable: Yes
NE corner of Fred Waring Dr. and Monterey Dr., 22 ft
north of ECR, on conc curb
RETURN TO NETWORK PLOT
Monument Location
EXHIBIT “A” Statement of Work
As detailed in the following report, Michael Baker International performed a city-wide update to the vertical geodetic control
network of Palm Desert as detailed below:
· 44 existing benchmarks were updated, and 3 new benchmarks were added
· Horizontal and vertical accuracy established to within FGDC Accuracy of 0.02 meters at 95% confidence level
· All procedures were performed in accordance with “CLSA_CSRC_GNSS_Standards_and_Specifications_v1.1”
Network Design, Post Processing & Least-Squares Adjustment
The project consisted of updating elevations for 44
existing city benchmarks with derived California Orthometric
Heights of 1988 (COH88). COH88 heights were derived using a
least-squares adjustment constraining to neighboring CORS
and applying the latest NGS hybrid geoid model, GEOID18. A
semi-permanent GNSS station was established within a City of
Palm Desert property to provide redundancy in the network.
Only non-trivial baselines were used from CORS to the City base
creating a central hub. All network observations on the City
benchmarks were then processed from the benchmarks to the
central hub.
Initial processing of planned CORS constraints was
analyzed using non-trivial baseline from WIDC, IDQG, TMAP,
PIN2, and WWMT to COTD. Network integrity and date-of survey
baseline validity was analyzed using a minimally constrained
adjustment and date of survey station values derived using Trimble
RTX to first calculate ITRF2014 positions which were then
transformed to NAD83 date of survey using HTDP. All date of survey
station values fit within expected accuracy validating the network
baselines. Next, CSRC 2017.50 published values were analyzed
using the same network configuration. During the analysis it was
determined that the published horizontal values for WIDC were
larger than expected and that the published ellipsoidal height for
IDQG was incorrect. See below for a listing of the final constraints.
Station Latitude Longitude Ellipsoidal
Height (m)
COTD 33-43-56.943836 116-23-12.757381 28.3969
IDQG 33-46-04.692971 116-14-20.296228
PIN2 33-36-43.724974 116-27-27.383056 1259.1458
TMAP 33-38-28.473468 116-09-37.614681 -66.1653
WIDC 445.7879
WWMT 33-57-19.118793 116-39-13.838954 797.3730
Future Datums
Lastly, with the future release of the North American-Pacific Geopotential Datum of 2022 (NAPGD2022) and
GEOID2022, a few additional considerations were taken. Research into the NGS GPS on Benchmarks campaign was
performed and coordinated with NGS which led to a total of five (5) 4-hour + occupations. These occupations included two
on City BM 119 (AH9140), two on City BM 127 (AH9142) and one on DUNEPORT (DX3691). Derived positions for these
three stations are included in Exhibit “C” and can be used for comparison if NGS included updated positions for these
stations.
Quality Control
To validate the quality of the final adjustment, differential level circuits were run, and GNSS-derived orthometric
elevation differences were compared to closed-loop level circuits. A total of 12 City benchmarks were included in the quality
assessment.
Observations and Adjustments
· GNSS observation data was collected and processed in conformance with the guidelines referenced in
“CLSA_CSRC_GNSS_Standards_and_Specifications_v1.1” including:
· Redundant repeat observations for all stations: 100% two occupations and 50% three occupations
· Minimum 120-minute separation between occupations
· PDOP of less than 4 with 15-degree mask above the horizon
· Least squares network adjustments for minimal and final horizontal and vertical constraints
· Observations included SVNs from GPS, GLONASS, BeiDou & Galileo
· Each centering device was tested prior to the commencement of the survey and as soon as possible after
the completion
· Fixed height 2m rods with two forms of level verification were used
· Trimble R10s were used for all collections
· Baselines will be processed using Trimble Business Center v5.52, which includes Trimble’s new static GNSS
Baseline Processing engine (GNSS engine released Jan 2018)
Conclusions
The City of Palm Desert has undertaken a worthy project to establish a locally densified California Geodetic
Control Coordinate and Orthometric Height network in accordance with the California Public Resources
Code Sections 8870-8880, 8801-8819, and 8890-8902. This network will benefit the infrastructure and
resource planning, operations, and maintenance functions of the city for many years to come. As documented in this
control network update, the network consists of a good mix of existing and durable set monuments dispersed evenly
throughout the city limits.
The project procedures and adjustment analysis, along with sampling of surrounding control points have
statistically validated the control network within 0.03’ to 0.05’ (1 cm – 1.5 cm) horizontal and
0.06’ (2 cm) vertical accuracy classification at 95% confidence in accordance with the Federal Geographic
Data Committee Geospatial Accuracy Standards Part 2: Standards for Geodetic Networks (FGDC-STD-007.2
1998).
In order to maintain the integrity of the control network regular quality assessment and network updates should
be undertaken. Using the California Spatial Reference Center (CSRC) application “SCIP” vertical velocities based on
InSAR+GNSS data over a 5-year period were obtained and analyzed. Based on this data, subsidence is consistent within
1-2mm per year resulting in rigid network. The areas with the largest velocity differences are near BM 161A and BM 143
where yearly velocity differences range from 3-5mm approximately. Given this information, we would like to make a two
part recommendation:
5 Years from Complete Network Update
1. Perform BM quality assessment, to include:
a. Field visit to each BM location ensuring that BMs are existent and undisturbed.
b. Perform field measurements between BMs in areas of large velocity differences to ensure published
elevations fall within published accuracy specifications.
i. BMs 161A, 141 & 132
ii. BMs 143, 129 & 115
10 Years from Complete Network Update
1. Perform network wide update per the direction of the City Surveyor
Additionally, episodic events of crustal motions such as large earthquakes would justify analysis and potentially updating
the control network.
EXHIBIT "B" NETWORK TABLE
COH88
Point Number Lat Long Ellips (ftus)Northing Easting Elevation GPS Usable
101 33° 47' 13.26815" N 116° 22' 15.36157" W 123.99 2230019.59 6524921.07 231.59 Yes
103 33° 46' 20.69966" N 116° 21' 21.88420" W 140.19 2224700.89 6529429.29 247.89 Yes
104 33° 46' 22.21566" N 116° 20' 09.33120" W 47.25 2224848.49 6535554.09 155.12 Yes
105 33° 45' 27.43652" N 116° 22' 25.85872" W 133.54 2219322.87 6524022.38 241.00 Yes
106 33° 45' 28.78051" N 116° 20' 18.58201" W 110.18 2219447.78 6534768.59 217.99 Yes
107 33° 45' 29.09695" N 116° 19' 17.03335" W 28.15 2219475.78 6539965.20 136.11 Yes
108 33° 45' 09.19002" N 116° 22' 58.47498" W 91.38 2217481.86 6521266.21 198.71 Yes
114 33° 43' 42.74981" N 116° 22' 25.85468" W 77.82 2208740.93 6524010.15 185.02 Yes
115 33° 43' 44.34161" N 116° 21' 23.69622" W 59.07 2208896.03 6529260.17 166.50 Yes
118 33° 43' 31.40423" N 116° 24' 02.73056" W 111.27 2207604.88 6515826.44 218.05 Yes
119 33° 43' 17.56151" N 116° 22' 58.04526" W 119.74 2206198.21 6521288.12 226.73 Yes
120 33° 43' 15.85418" N 116° 21' 46.41316" W 103.46 2206018.50 6527338.40 210.70 Yes
121 33° 42' 52.04882" N 116° 22' 24.99166" W 163.18 2203615.92 6524076.97 270.19 Yes
122 33° 42' 38.17089" N 116° 22' 59.37222" W 232.89 2202216.70 6521170.95 339.71 Yes
123 33° 42' 09.85834" N 116° 23' 51.10862" W 418.77 2199360.73 6516796.39 525.22 Yes
124 33° 42' 10.24825" N 116° 23' 12.24359" W 345.81 2199395.67 6520079.92 452.44 Yes
125 33° 42' 08.50760" N 116° 22' 28.69377" W 254.80 2199215.11 6523758.98 361.60 Yes
126 33° 41' 41.96049" N 116° 23' 13.09744" W 439.39 2196536.42 6520004.03 545.87 Yes
127 33° 40' 38.72272" N 116° 24' 26.92642" W 792.96 2190153.13 6513756.45 898.71 Yes
128 33° 44' 36.71047" N 116° 19' 20.32559" W 78.90 2214180.63 6539683.56 186.79 Yes
129 33° 44' 03.95572" N 116° 18' 14.39475" W 36.15 2210866.35 6545249.36 144.18 Yes
130R 33° 43' 44.87273" N 116° 18' 15.87835" W 32.65 2208937.47 6545123.05 140.64 Yes
131 33° 44' 35.42846" N 116° 18' 14.31810" W 12.27 2214047.67 6545257.47 120.33 Yes
132 33° 45' 27.91074" N 116° 23' 27.10360" W 118.26 2219377.37 6518851.48 225.53 Yes
133 33° 44' 36.93513" N 116° 21' 23.13819" W 82.17 2214212.23 6529312.72 189.73 Yes
134 33° 48' 11.57689" N 116° 23' 18.21357" W 126.54 2235920.23 6519624.03 234.01 Yes
135 33° 47' 49.60053" N 116° 22' 43.49528" W 89.28 2233695.03 6522551.05 196.83 Yes
136 33° 46' 55.32092" N 116° 21' 21.24681" W 60.07 2228200.45 6529486.65 167.78 Yes
137 33° 41' 32.13523" N 116° 24' 01.87565" W 580.76 2195548.95 6515881.25 686.95 Yes
138 33° 44' 37.05391" N 116° 20' 18.56237" W 113.41 2214219.14 6534765.81 221.14 Yes
139 33° 43' 12.84898" N 116° 23' 27.25157" W 138.66 2205725.10 6518820.54 245.51 Yes
140 33° 45' 30.34298" N 116° 18' 13.82223" W 2.53 2219598.53 6545302.22 110.61 Yes
141 33° 43' 49.48443" N 116° 22' 51.89218" W 78.31 2209424.37 6521811.90 185.44 Yes
142 33° 47' 15.04851" N 116° 23' 16.50868" W 210.94 2230205.96 6519760.35 318.39 Yes
143 33° 43' 45.06244" N 116° 19' 46.34735" W 51.70 2208961.56 6537482.18 159.43 Yes
144 33° 46' 20.55458" N 116° 22' 14.21133" W 166.18 2224691.03 6525011.99 273.75 Yes
145 33° 45' 29.90251" N 116° 21' 23.37402" W 143.15 2219566.31 6529298.28 250.79 Yes
147 33° 44' 39.46895" N 116° 22' 25.06308" W 78.06 2214474.12 6524083.81 185.43 Yes
154 33° 46' 20.74103" N 116° 23' 25.81669" W 176.12 2224717.44 6518967.33 283.49 Yes
161A 33° 44' 18.87450" N 116° 23' 28.81635" W 85.24 2212399.24 6518697.41 192.33 Yes
161 192.47 No
170 33° 42' 53.49174" N 116° 21' 21.41474" W 107.12 2203755.86 6529447.63 214.37 Yes
171 33° 42' 40.67287" N 116° 23' 37.71409" W 263.15 2202473.91 6517932.32 369.82 Yes
172 33° 43' 45.04306" N 116° 23' 27.49385" W 85.18 2208979.35 6518804.48 192.16 Yes
Duneport 33° 45' 01.42781" N 116° 16' 50.05162" W -38.26 2216672.85 6552374.13 69.96 Yes
COTD 33° 43' 56.94384" N 116° 23' 12.75738" W 93.17 2210180.64 6520050.67 200.25 Yes
IDQG 33° 46' 04.69297" N 116° 14' 20.29623" W -1.89 2223066.67 6565018.50 106.18 Yes
PIN2 33° 36' 43.72497" N 116° 27' 27.38306" W 4131.05 2166426.47 6498459.01 4234.32 Yes
TMAP 33° 38' 28.47347" N 116° 09' 37.61468" W -217.08 2176963.10 6588922.35 -107.89 Yes
WIDC 33° 56' 05.11687" N 116° 23' 30.36902" W 1462.56 2283789.79 6518663.36 1567.76 Yes
WWMT 33° 57' 19.11879" N 116° 39' 13.83895" W 2616.09 2291478.48 6439196.55 2719.75 Yes
NAD83 (2017.50)NAD83 (2017.50)
Not GPS Usable, Approximate Position: N: 2212418 E: 6518703
EXHIBIT "C" HISTORICAL NETWORK COMPARISON
COH88 Derived
Northing Easting Epoch Adj. Date Elevation Adj. Date Northing Easting Elevation Adj. Date Delta Northing Delta Easting Delta Elevation
101 2230018.66 6524921.74 2004.00 Jan 2006 231.830 Dec 2000 2230019.59 6524921.07 231.59 May 2022 -0.93 0.67 0.24
102 2224689.54 6524932.32 2004.00 Jan 2006 273.795 Aug 1995
103 2224699.95 6529429.95 2004.00 Jan 2006 248.196 Aug 1995 2224700.89 6529429.29 247.89 May 2022 -0.94 0.66 0.31
104 2224847.60 6535554.76 2004.00 Jan 2006 155.374 Aug 1995 2224848.49 6535554.09 155.12 May 2022 -0.89 0.67 0.25
105 2219321.93 6524023.07 2004.00 Jan 2006 241.264 Aug 1995 2219322.87 6524022.38 241.00 May 2022 -0.94 0.69 0.26
106 2219446.87 6534769.29 2004.00 Jan 2006 218.214 Aug 1995 2219447.78 6534768.59 217.99 May 2022 -0.91 0.70 0.22
107 2219474.89 6539965.88 2004.00 Jan 2006 136.395 Aug 1995 2219475.78 6539965.20 136.11 May 2022 -0.89 0.68 0.28
108 2217480.97 6521266.96 2004.00 Jan 2006 199.044 Aug 1995 2217481.86 6521266.21 198.71 May 2022 -0.89 0.75 0.33
114 2208740.04 6524010.85 2004.00 Jan 2006 185.102 Aug 1995 2208740.93 6524010.15 185.02 May 2022 -0.90 0.70 0.08
115 2208895.12 6529260.86 2004.00 Jan 2006 166.781 Aug 1995 2208896.03 6529260.17 166.50 May 2022 -0.91 0.69 0.28
116 2208916.91 6538713.42 2004.00 Jan 2006 151.657 Aug 1995
118 2207603.98 6515827.16 2004.00 Jan 2006 218.010 Aug 1995 2207604.88 6515826.44 218.05 May 2022 -0.90 0.71 -0.04
119 2206197.32 6521288.84 2004.00 Jan 2006 226.821 Aug 1995 2206198.21 6521288.12 226.73 May 2022 -0.89 0.72 0.09
120 2206017.58 6527339.09 2004.00 Jan 2006 210.811 Aug 1995 2206018.50 6527338.40 210.70 May 2022 -0.92 0.69 0.11
121 2203615.00 6524077.71 2004.00 Jan 2006 270.248 Aug 1995 2203615.92 6524076.97 270.19 May 2022 -0.92 0.74 0.06
122 2202215.80 6521171.71 2004.00 Jan 2006 339.738 Aug 1995 2202216.70 6521170.95 339.71 May 2022 -0.90 0.75 0.03
123 2199359.80 6516797.08 2004.00 Jan 2006 525.232 Aug 1995 2199360.73 6516796.39 525.22 May 2022 -0.93 0.69 0.01
124 2199394.72 6520080.66 2004.00 Jan 2006 452.445 Aug 1995 2199395.67 6520079.92 452.44 May 2022 -0.95 0.74 0.00
125 2199214.23 6523759.70 2004.00 Jan 2006 361.564 Aug 1995 2199215.11 6523758.98 361.60 May 2022 -0.88 0.72 -0.04
126 2196535.51 6520004.77 2004.00 Jan 2006 545.859 Aug 1995 2196536.42 6520004.03 545.87 May 2022 -0.91 0.74 -0.01
127 2190152.21 6513757.17 2004.00 Jan 2006 898.708 Aug 1995 2190153.13 6513756.45 898.71 May 2022 -0.92 0.72 0.00
128 2214179.72 6539684.28 2004.00 Jan 2006 187.281 Aug 1995 2214180.63 6539683.56 186.79 May 2022 -0.92 0.72 0.49
129 2210865.51 6545249.98 2004.00 Jan 2006 144.416 Aug 1998 2210866.35 6545249.36 144.18 May 2022 -0.84 0.62 0.24
130 2208930.34 6545135.15 2004.00 Jan 2006 141.280 Apr 1997
130R 2208937.17 6545123.28 2010.00 Jun 2021 140.935 Jun 2021 2208937.47 6545123.05 140.64 May 2022 -0.30 0.23 0.30
131 2214046.79 6545258.16 2004.00 Jan 2006 120.607 Jan 2006 2214047.67 6545257.47 120.33 May 2022 -0.88 0.69 0.28
132 2219376.36 6518852.27 2004.00 Jan 2006 225.767 Aug 1995 2219377.37 6518851.48 225.53 May 2022 -1.01 0.79 0.24
133 2214211.36 6529313.42 2004.00 Jan 2006 189.992 Dec 2000 2214212.23 6529312.72 189.73 May 2022 -0.87 0.70 0.26
134 2235919.25 6519624.72 2004.00 Jan 2006 234.216 Jan 2006 2235920.23 6519624.03 234.01 May 2022 -0.98 0.69 0.21
135 2233694.10 6522551.73 2004.00 Jan 2006 197.014 Jan 2006 2233695.03 6522551.05 196.83 May 2022 -0.93 0.67 0.18
136 2228199.58 6529487.35 2004.00 Jan 2006 168.028 Jan 2006 2228200.45 6529486.65 167.78 May 2022 -0.87 0.69 0.25
137 2195548.04 6515881.97 2004.00 Jan 2006 687.008 Jan 2006 2195548.95 6515881.25 686.95 May 2022 -0.91 0.72 0.06
138 2214218.27 6534766.49 2004.00 Jan 2006 221.479 Jan 2006 2214219.14 6534765.81 221.14 May 2022 -0.88 0.68 0.34
139 2205724.22 6518821.23 2004.00 Jan 2006 245.597 Jan 2006 2205725.10 6518820.54 245.51 May 2022 -0.88 0.69 0.09
140 2219597.68 6545302.87 2004.00 Jan 2006 110.839 Dec 1999 2219598.53 6545302.22 110.61 May 2022 -0.85 0.65 0.23
141 2209423.44 6521812.61 2004.00 Jan 2006 185.784 Jan 2006 2209424.37 6521811.90 185.44 May 2022 -0.93 0.71 0.34
142 2230205.39 6519761.31 2004.00 Nov 2006 318.666 Sep 2006 2230205.96 6519760.35 318.39 May 2022 -0.57 0.96 0.28
143 2208960.64 6537482.88 2004.00 Feb 2008 159.899 Feb 2008 2208961.56 6537482.18 159.43 May 2022 -0.92 0.70 0.47
144 2224690.35 6525012.50 2004.00 Dec 2011 273.997 Dec 2011 2224691.03 6525011.99 273.75 May 2022 -0.68 0.51 0.25
145 2219565.65 6529298.76 2004.00 Mar 2012 251.082 Mar 2012 2219566.31 6529298.28 250.79 May 2022 -0.66 0.48 0.29
146 2210263.17 6518799.25 2004.00 Oct 2013 193.225 Oct 2013
147 2214473.24 6524084.56 2004.00 Nov 2006 185.984 Jan 2004 2214474.12 6524083.81 185.43 May 2022 -0.88 0.75 0.55
Destroyed
NAD83 Epoch 2004.0 NAVD88 (epoch 1991.5)NAD83 Epoch 2017.50
Destroyed
Destroyed
Destroyed
EXHIBIT "C" HISTORICAL NETWORK COMPARISON
COH88 Derived
Northing Easting Epoch Adj. Date Elevation Adj. Date Northing Easting Elevation Adj. Date Delta Northing Delta Easting Delta Elevation
NAD83 Epoch 2004.0 NAVD88 (epoch 1991.5)NAD83 Epoch 2017.50
154 2224716.45 6518968.11 2004.00 Jan 2006 283.715 Aug 1995 2224717.44 6518967.33 283.49 May 2022 -0.99 0.78 0.22
155 2230139.81 6519772.33 2004.00 Jan 2006 318.766 Aug 1995
156 2219470.13 6529369.71 2004.00 Jan 2006 250.396 Aug 1995 250.07 May 2022 0.33
157 2203741.46 6529333.54 2004.00 Jan 2006 213.860 Aug 1995 213.77 May 2022 0.09
RM23/94 2215433.50 6518681.10 2004.00 Jan 2006 200.472 Jan 2006
161 Jan 1900 193.405 Jan 2006 192.47 May 2022 0.94
161A 2212398.25 6518698.26 2004.00 Jan 1900 2212399.24 6518697.41 192.33 May 2022 -0.99 0.85 ***
162 2208830.54 6518724.07 2004.00 Jan 2006 192.319 Feb 2009 192.15 May 2022 0.17
163 2202143.71 6519864.02 2004.00 Jan 2006 363.323 Aug 1995
164 2202654.53 6517866.74 2004.00 Jan 2006 362.641 Aug 1995
1023 2208901.75 6518792.81 2004.00 Jan 2006
RM23/94 2215433.50 6518681.10 2004.00 Jan 2006 200.472 Jan 2006
*** 161A and 1023 have no previously published elevation
**
* 156, 157 & 162 are legacy centerline BMs. Level circuits were ran from the nearest updated BM
to derive COH88 elevations for historical comparision purposes.
** 161 is not GPS usable. COH88 elevation was derived from a level circuit between 161A & 161
***
*
*
*
*
**
****
Destroyed
***
Destroyed
Destroyed
Destroyed
Destroyed
Destroyed
Appendix “A” Legacy Centerline Benchmark Sheets
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