Gary Lee Moore, P.E., City Engineer Vince Jones, P.E., Deputy City Engineer

WHITE POINT LANDSLIDE GEOTECHNICAL INVESTIGATION

March 2012 Status Report

White Point Landslide Geotechnical Investigation March 2012 Status Report Page 2 March 29, 2012

City of Los Angeles, Bureau of Engineering

TABLE OF CONTENTS

1.0 Background 2.0 Site Observations and Activities for the Period February 28,

2012 to March 27, 2012 3.0 Landslide Monitoring for the Period February 28, 2012 to

March 27, 2012

4.0 Geotechnical Investigation

Attachment 1 – Status Report Prepared by Shannon & Wilson, Inc. for 3/1/12 through 3/27/12 White Point Landslide Investigation

Attachment 2 – Summary of Survey Monitoring Points White Point

Landslide, prepared by the Bureau of Engineering March 28, 2012

White Point Landslide Geotechnical Investigation March 2012 Status Report Page 3 March 29, 2012

City of Los Angeles, Bureau of Engineering

1.0 Background This March 2012 Status Report provides a progress summary of the Geotechnical Investigation and monitoring of the White Point Landslide for the period of February 28, 2012 to March 27, 2012. The Bureau of Engineering (BOE) continues to oversee and support the geotechnical investigation of the landslide being conducted by Shannon & Wilson, Inc., a private consulting firm. Attached to this report are the March 28, 2012 Status Report by Shannon & Wilson, Inc. (Attachment 1) and a Summary of Survey Monitoring Points by the Bureau of Engineering (Attachment 2). 2.0 Site Observations and Activities for the Period February 28, 2012 to March 27, 2012 Shannon & Wilson, Inc. continue with the geotechnical investigation of the landslide and currently is near complete with stability analyses and is formulating conceptual mitigation alternatives. The Draft Geotechnical Report is being prepared and is expected to be competed by early May. 3.0 Landslide Monitoring for the Period February 28, 2012 to March 27, 2012 Survey Monitoring The BOE continues to survey the established survey monitor stations and monitor points set on the street, curb and ground around the landslide to check for evidence of ground movement which might indicate landslide movement or enlargement. A summary table of the survey monitoring is provided in Attachment 2. The survey data as of the date of this report shows no indication of surface ground movement which might signal landslide enlargement. Instrument Monitoring Geologists from both BOE and Shannon & Wilson, Inc. continue to conduct site observation of the landslide and surrounding area. As described in Attachment 1, Shannon & Wilson, Inc. continues with the inclinometer monitoring (measurement of devices that were placed in some borings to detect ground movement) and water well readings. This monitoring continues to show no significant movement. 4.0 Geotechnical Investigation A status report prepared by Shannon & Wilson, Inc. and dated March 29, 2012 is presented in Attachment 1. This report summarizes the progress of the Geotechnical investigation through March 27, 2012. As indicated in the report, Shannon & Wilson, Inc. has completed the field investigation and laboratory analyses and is near completion of the stability analyses. Shannon & Wilson, Inc. report that no new significant ground cracks have been observed in the area between the fence and main landslide mass during the latest monitoring period.

Attachment 1

Status Report Prepared By Shannon & Wilson, Inc.

ALASKA CALIFORNIA

COLORADO FLORIDA

MISSOURI OREGON

WASHINGTON

664 WEST BROADWAY GLENDALE, CALIFORNIA 91204-1008 www.shannonwilson.com 51-1-10052-012

March 28, 2012 Bureau of Engineering 1149 South Broadway Street, Suite 120 Los Angeles, California 90015 Attn: Mr. Mark Oborne

RE: STATUS REPORT FOR 3/1/12 THROUGH 3/27/12 WHITE POINT LANDSLIDE INVESTIGATION CITY OF LOS ANGELES W.O. E1907483, TOS 11-087 SHANNON & WILSON PROJECT NO. 51-1-10052-012

This letter provides an update to the subtask status for the period ending March 27, 2012. Shannon & Wilson is currently performing a subsurface investigation of the White Point Landslide following significant movement of the landslide on November 20, 2011. During the course of our services, we have not observed new surface cracks related to landslide movement outside of the fenced perimeter of the landslide. We have recorded recent groundwater depths in the inclinometer borings and wells that were installed along the landslide perimeter (Figure 1). During the most recent reporting period, the groundwater surface was measured at depths ranging from approximately 50 to 100 feet below ground surface. Groundwater levels measured within the completed wells and inclinometers appear to be relatively stable with only minor fluctuations (Table 1).

As previously reported, we believe the projected landslide failure plane is about 100 feet deep in the area of the active landslide. Ongoing visual observation of the existing cracks adjacent to the main head scarp within the fenced-off area suggest that the material immediately adjacent to the scarp is moving or rotating into the graben area. We expect to see periodic detachment of the scarp material throughout the winter and upcoming spring months. It is also likely that the main landslide mass will continue to move ocean-ward and likely accelerate during and after periods of heavy precipitation. No new significant ground cracks have been observed in the area between the fence and main landslide mass during the latest monitoring period. Some minor ground cracks related to soil wetting and drying (soil expansion cracks) were noted along the perimeter hiking trail on our March 15 site visit. It was also noted on our March 26 site visit that many of the surface ground cracks along the perimeter hiking trail have vanished, most likely

Mr. Mark Oborne City of Los Angeles March 28, 2012 Page 2 of 3

51-1-10052-012-L05.docx/wp/DGF 51-1-10052-012

due swelling caused by the recent heavy rain. Readings of the installed inclinometers indicate that no measurable ground movement has occurred in the areas of the inclinometers (Table 2). These conclusions are preliminary and are subject to change as our studies develop.

SUBTASK STATUS

The status of each subtask is listed below:

Subtask Status 1. Health and Safety Plan Complete 2. Geologic Mapping Complete 3. Preliminary Report Complete 4. Subsurface Exploration Complete 5. Waste Handling and Management Ongoing - 95% Complete 6. Geophysical Downhole Logging Complete 7. Laboratory Testing of Samples Complete 8. Geologic Cross Sections Complete 9. Stability Analysis Ongoing – 95% Complete 10. Meetings Ongoing – 65% Complete 11. Geotechnical Report Ongoing - 85% Complete 12. Missile Base Silo Observations Complete

TASKS COMPLETED FOR THIS PERIOD

For this work period, tasks completed include:

Instrumentation reading dates shown in Tables 1 and 2. Instrumentation will be read on monthly basis for the subsequent months to monitor the landslide area for groundwater elevations and possible subsurface movement.

Site observations for landslide movement during the weeks of 3/12/12, 3/19/12, and 3/26/12. Based on visual observations, no ground fractures related to ground movement have appeared at the fenced perimeter of the landslide area.

Geologic mapping of the landslide graben and slope area west of the landslide. Project Team Meetings with the City of Los Angeles BOE at the downtown office, and

field meetings on site. Observations inside of fenced area for ground crack growth.

White Point LandslideCity of Los Angeles

Table 1Groundwater Data

Shannon & Wilson, Inc.

Reading Date

Water Elevation

(ft.)

Water Elevation

(ft.)Water

Elevation (ft.)

Water Elevation

(ft.)

Water Elevation

(ft.)Water Depth2

(ft.)Water

Elevation (ft.)

Water Depth1

(ft.)

Water Elevation

(ft.)Water Depth2

(ft.)Water

Elevation (ft.)

Water Elevation

(ft.)

11/29/2011 60.0 (3) 63.012/2/2011 88.0 (3) 36.512/8/2011 98.0 (3) 26.1 55.0 (3) 75.0

12/16/2011 68.0 (3) 55.912/30/2011 25.0 50.6 86.1 75.9 51.6

1/4/2012 59.4 60.1 95.4 27.2 41.61/11/2012 59.2 25.2 59.9 50.4 86.3 95.5 27.1 76.0 51.5 35.71/18/2012 59.5 24.7 60.1 51.1 85.6 95.3 27.3 76.0 51.5 35.11/25/2012 59.3 25.0 59.9 51.5 85.2 95.3 27.3 76.6 51.0 34.92/27/2012 63.5 24.6 59.8 51.0 85.7 95.4 27.2 76.7 50.9 34.13/22/2012 64.7 24.4 59.8 50.1 86.6 95.9 26.7 76.9 50.6 34.0

Notes: 1. Measured using vibrating wire piezometer.2. Measured using electronic well sounder.3. Measured during drilling.

58.2 99.8 64.1 94.159.5 99.6 64.1 94.063.7 99.1 64.0 93.263.5 99.5 63.8 93.063.8 99.0 64.0 92.463.6 63.8 86.5

Water Depth1 (ft.)

99.2

Screened Elev. = 98.55 to 17.55 VWP Elev. = 14.02

Water Depth1 (ft.)

Water Depth (ft.) Water Depth2 (ft.)

Water Depth (ft.)

Water Depth1 (ft.)

VWP Elev. = 1.8 Screened Elev. = 84.14 to 14.14 VWP Elev. = 6.41 Screened Elev. = 100.78 to 26.68 VWP Elev. = 7.31Elev. 122.99 ft. Elev. ~124.5 ft. Elev. 124.14 ft. Elev. ~130 ft. Elev. 123.91 ft. Elev. 136.68 ft. Elev. 122.61 ft. Elev. 127.55 ft. Elev. 128.12 ft.

B-6 B-7 B-8 B-9Well/ VWP

B-1 B-2 B-3 B-4 B-5

4/2/2012, 51‐1‐10052‐011‐TB1.xlsx, JXM Page 1 of 1 51‐1‐10052‐011

White Point LandslideCity of Los Angeles

Table 2Inclinometer Data

Shannon Wilson, Inc.

3/29/2012, 51-1-10052-011-TB1&2.xlsx, JXM Page 1 of 1 51-1-10052-011

B-1 B-5 B-7 B-912/28/2011 Baseline Baseline Baseline Baseline

1/4/2012 <0.1 <0.1 <0.1 <0.11/11/2012 <0.1 <0.1 <0.1 <0.11/18/2012 <0.1 <0.1 <0.1 <0.11/25/2012 <0.1 <0.1 <0.1 <0.12/27/2012 <0.1 <0.1 <0.1 <0.13/22/2012 <0.1 <0.1 <0.1 <0.1

Notes: 1. Measured using inclinometer. Baseline: Three series of measurements to determine starting point used for comparisons.

Cumulative Displacement (in.)Inclinometer Reading Date

148.675 AT4

122.400 AT5

123.5

40.3

41.0

CONC

GNV

ASPH

ASPH

CONC

GNV

GNV

GNV

GNV

GNV

PIPE

PIPE

PIPE

PIPE

PIPE

DIRT

DIRT

DIRT

ASPH

ASPH

ASPH

ASPH

ASPH

PACIFIC OCEAN

CONC

CONC

CONC

ROCKS

ROCKS

PIPE

ASPH

144.6

142.1

149.4

142.9

137.1 136.4 136.5

137.1 136.6138.8

139.1

137.5

132.8132.3

132.1 131.6

131.9 131.1

131.1

143.1

130.6

128.6

129.3128.9

128.3

127.9

129.8130.3

130.9

127.2

126.7126.4 125.7

125.2124.7

126.2

128.3

124.4

123.7123.2

122.7122.4

122.5

124.9125.2

123.4

131.9

132.3

133.5

132.8

133.0

134.6

132.5131.8

131.9128.9

128.3

129.3

146.9

144.8

142.5138.5

138.1138.1

138.9

137.9

138.3138.1138.1

138.3138.4

138.5

138.4

138.5

138.5

138.3

138.3

138.1

137.1

132.8

133.1133.8

137.8

135.4

135.3

137.1

138.8139.6

135.9

134.8

BRUSH

BRUSH

BRUSH

CONC CONC

CONC

CONC

TREES

CONC

CONC

TREES

CONC

CONC

CONC

CONC

CONC

CONC

BRUSH

BRUSH

BRUSH

BRUSH

BRUSH

BRUSH

BRUSH

CONC

CONC

DIRT

DIRT BRUSH

BRUSH BRUSH

BRUSH

TREES

BRUSH

BRUSH

BRUSH BRUSH

CONCASPH

ASPH ASPH

CONC

81.6

82.7

87.2

88.5

74.5

64.7

67.4 76.2 98.9

112.1

107.8

116.0

GNV

GNV

VC

VC

VC VC

UB

VC VCVC

VC

VC

VC

ROCKS

R

R

R

ROCKS

ROCKS

PIPE

S

PIPES

PIPES

PIPES PIPES

PIPE

DI

PACIFIC OCEAN

PACIFIC OCEAN

ASPH

ASPH

ASPH

ASPH

ASPH

DIRT

DIRT

DIRT

DIRT

138.1137.4

136.5

136.6

137.1

138.1

138.3

137.9

136.9

137.4

127.9

128.1128.8128.5

128.5

137.8

131.1

131.9130.9

138.4

127.2

127.2

126.9

126.7

124.2

122.5

123.9 123.9

125.2

126.2

122.2121.9

122.7 122.7

123.0 122.7

121.5

123.5

127.2

126.2

126.2125.7

126.2

122.7

122.0

122.2 122.7

122.7

122.2

123.2

123.7123.4

125.2

148.4

240.9

239.3

132.5

91.2

101.0

124.2123.7

124.4

120.2

137.8

133.9

132.3132.6

133.1

132.3

136.4

135.6

138.1

140.9

138.6139.8

141.8

140.5

142.5

150.9

150.1

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prepared by

Advanced Digital Maps, Inc

626-33 7-997 1

Map Scale: 1" - 40'

ADM 2371

Photo Date: 12-14-11

Con tour In terval= .5 Ft.

PASEO DEL MAR LANDSLIDE

0'120'80'40'

SCALE 1"=40'

CONCCONC

CONC

CONC

GNV

E 6,467,200

N 1,718,400

N 1,718,800

145

130

127.5

125

122.5

130

132.5

122.5

120115

110105100

9590

8580

22.5

52.5

7.5

3545

5565

75

125

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12.515

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110

105

70

107.5

67.570

72.5

95

122.5

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82.580

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3040

50

60

7080

90

100

122.5

122.5

120

120

122.5

125

145

142.5

140

137.5

135

132.5

130

147.5

150

152.5

155

257.5

265

260

267.5

137.5

135

130

132.5

127.5

140

142.5

137.5

142.5

140

132.5

142.5

140.6

137.8137.1

128.6

137.8

148.9

147.1

150.5

142.9

137.6

141.9

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ROCKS

61.2

68.5

7.2

22.8

20.6

6.7

8.8

85.774.9

80.0

92.2

70.7

94.2

75.7 119.2

70.9 71.060.8

6.7 5.56.2 6.4

8.4

125.7

126.9

126.7

122.7

127.9128.1

136.3

128.8

124.2

138.3

138.3

137.9

138.4

138.5

133.3

139.5

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Los Angeles, California

SITE AND EXPLORATION PLAN

FIG. 1March 2012 51-1-10052-012

³

1 inch = 100 feet0 100 20050 Feet

LEGEND!(( Boring!. Groundwater Well!> Inclinometer

Head Scarp

City of Los Angeles, Bureau of Engineering

Attachment 2

Summary of Survey Monitoring Points

FIGURE 2

Monitoring StationReference Position

01/26/2012 -0.002' 0.001' 0.002' 0.000' 0.000'02/09/2012 -0.001' -0.001' 0.001' 0.001' 0.003'02/16/2012 0.001' -0.005' -0.003' 0.005' 0.001'02/23/2012 0.005' -0.002' -0.006' 0.001' 0.007'02/29/2012 0.007' -0.004' -0.008' 0.001' 0.011'03/09/2012 0.004' 0.001' -0.004' -0.001' 0.007'03/21/2012 0.002' -0.005' -0.004' 0.004' 0.011'

01/26/2012 -0.002' -0.004' 0.001' 0.004' 0.002'02/09/2012 -0.005' 0.001' 0.005' 0.001' -0.004'02/16/2012 -0.004' -0.001' 0.004' 0.002' -0.001'02/23/2012 -0.002' -0.002' 0.001' 0.002' -0.003'02/29/2012 0.004' -0.005' -0.005' 0.004' -0.006'03/09/2012 -0.005' 0.001' 0.005' 0.000' 0.001'03/21/2012 -0.003' 0.003' 0.004' -0.002' -0.001'

01/26/2012 0.001' 0.002' 0.000' -0.002' -0.001'02/09/2012 0.000' -0.003' 0.000' 0.003' -0.004'02/16/2012 0.001' 0.003' 0.000' -0.003' 0.002'02/23/2012 -0.001' -0.003' 0.001' 0.003' -0.005'02/29/2012 -0.001' 0.005' 0.003' -0.005' -0.001'03/09/2012 -0.002' -0.001' 0.002' 0.001' 0.002'03/21/2012 0.000' 0.005' 0.002' -0.005' 0.002'

01/26/2012 0.004' -0.009' 0.000' 0.010' -0.005'02/09/2012 -0.006' 0.016' -0.002' -0.017' -0.031'02/16/2012 -0.013' 0.016' -0.008' -0.019' -0.010'02/23/2012 0.000' 0.000' -0.001' 0.000' -0.010'02/29/2012 0.011' 0.013' 0.015' -0.009' 0.005'03/09/2012 -0.010' 0.003' -0.008' -0.006' 0.008'03/21/2012 -0.006' -0.001' -0.007' -0.001' -0.012'

MS3

O\S= L31.428' STA= 2+41.212' N=1718635.458' E=6467068.307' EL=121.931'

MS1

O\S= L30.113' STA= 3+05.104' N=1718655.835' E=6467007.737' EL=121.531'

MS2

WHITE POINT SLIDE MONITORING STATIONS

REPORTCITY OF LOS ANGELES DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING

Elevation Difference

Northing DifferenceDate Offset

DifferenceEasting

DifferenceStation

Difference

O\S= L28.890' STA= 3+41.772 N=1718667.976' E=6466973.116' EL=121.518'

O\S= R107.982' STA= 3+17.889' N=1718791.427' E=6467036.869' EL=125.795'

MS4

Monitoring StationReference Position

01/26/2012 0.006' -0.019' 0.002' 0.022' 0.014'02/09/2012 -0.028' 0.016' -0.020' -0.022' -0.008'02/16/2012 -0.025' 0.013' -0.018' -0.018' 0.019'02/23/2012 -0.015' 0.008' -0.010' -0.010' 0.007'02/29/2012 -0.006' 0.010' -0.001' -0.009' 0.009'03/09/2012 -0.006' -0.003' -0.004' 0.003' 0.014'03/21/2012 -0.007' -0.015' -0.009' 0.014' 0.004'

01/26/2012 -0.001' 0.003' 0.002' -0.002' 0.000'02/09/2012 0.002' -0.008' -0.004' 0.007' 0.001'02/16/2012 -0.003' 0.002' 0.004' -0.001' 0.001'02/23/2012 0.004' 0.000' -0.004' -0.001' -0.009'02/29/2012 -0.003' 0.002' 0.003' -0.001' 0.004'03/09/2012 -0.003' 0.002' 0.004' -0.001' 0.004'03/21/2012 -0.001' 0.001' 0.001' -0.001' 0.002'

01/26/2012 -0.006' 0.007' 0.008' -0.005' -0.001'02/09/2012 0.004' 0.007' -0.002' -0.008' 0.002'02/16/2012 0.001' 0.007' 0.001' -0.007' -0.002'02/23/2012 0.008' 0.007' -0.005' -0.009' -0.009'02/29/2012 -0.010' 0.018' 0.015' -0.014' -0.001'03/09/2012 -0.015' -0.002' 0.014' 0.007' 0.000'03/21/2012 -0.004' 0.008' 0.006' -0.006' -0.004'

01/26/2012 -0.003' 0.000' 0.003' 0.001' 0.000'02/09/2012 0.003' -0.006' -0.005' 0.004' 0.005'02/16/2012 0.000' 0.005' 0.001' -0.005' 0.002'02/23/2012 -0.004' 0.003' 0.004' -0.002' -0.008'02/29/2012 -0.010' 0.011' 0.013' -0.009' 0.002'03/09/2012 -0.007' 0.002' 0.007' 0.000' 0.003'03/21/2012 -0.008' 0.003' 0.008' -0.001' 0.002'

01/26/2012 0.000' -0.001' 0.000' 0.003' 0.001'02/09/2012 -0.016' 0.011' -0.012' -0.013' 0.011'02/16/2012 -0.016' 0.011' -0.012' -0.013' 0.000'02/23/2012 0.000' 0.011' 0.003' -0.008' -0.012'02/29/2012 0.010' 0.029' 0.018' -0.022' 0.005'03/09/2012 0.014' 0.008' 0.016' -0.001' 0.008'03/21/2012 0.003' 0.010' 0.006' -0.006' 0.000'

O\S= R2.519' STA= 5+73.365' N=1718767.260' E=6466761.537' EL=122.176'

MS9

MS7

MS8

O\S= L25.063' STA= 5+06.640' N=1718720.972' E=6466816.952' EL=121.907'

Easting Difference

Station Difference

Northing Difference

Elevation DifferenceDate

O\S= L25.617' STA= 4+86.990' N=1718684.633' E=6466930.950' EL=121.468'

MS6

O\S= R151.330' STA= 3+10.782' N=1718830.658' E=6467056.622' EL=126.942'

MS5

Offset Difference

O\S= L25.719' STA= 4+51.049' N=1718703.708' E=6466869.797' EL=121.672'

Monitoring StationReference Position

01/26/2012 0.002' 0.005' 0.003' -0.003' 0.002'02/09/2012 -0.001' -0.004' -0.003' 0.005' 0.006'02/16/2012 0.001' 0.004' 0.001' -0.002' -0.002'02/23/2012 -0.005' -0.014' -0.010' 0.013' 0.003'02/29/2012 -0.007' 0.015' -0.003' -0.015' 0.007'03/09/2012 -0.010' -0.015' -0.015' 0.012' 0.005'03/21/2012 -0.018' 0.005' -0.016' -0.009' -0.002'

01/26/2012 0.010' -0.009' 0.007' 0.012' -0.003'02/09/2012 0.009' -0.002' 0.008' 0.006' 0.006'02/16/2012 0.002' 0.019' 0.008' -0.016' -0.007'02/23/2012 -0.003' -0.011' -0.006' 0.011' 0.000'02/29/2012 0.008' -0.001' 0.008' 0.004' 0.004'03/09/2012 0.006' -0.009' 0.003' 0.011' -0.005'03/21/2012 0.001' 0.002' 0.002' -0.001' 0.001'

01/26/2012 -0.002' -0.005' -0.003' 0.003' -0.004'02/09/2012 0.007' -0.013' 0.003' 0.014' -0.003'02/16/2012 0.007' 0.009' 0.009' -0.007' -0.010'02/23/2012 0.000' -0.014' -0.005' 0.013' -0.001'02/29/2012 0.005' -0.005' 0.003' 0.005' 0.006'03/09/2012 -0.004' -0.009' -0.006' 0.007' 0.000'03/21/2012 0.000' -0.011' -0.004' 0.010' 0.003'

01/26/2012 -0.013' 0.000' -0.011' -0.009' -0.011'02/09/2012 -0.012' 0.005' -0.010' -0.009' -0.031'02/16/2012 -0.009' -0.004' -0.010' 0.001' 0.006'02/23/2012 -0.002' -0.001' -0.002' 0.000' 0.005'02/29/2012 -0.003' -0.009' -0.006' 0.007' -0.004'03/09/2012 0.001' 0.011' 0.004' -0.011' 0.005'03/21/2012 -0.001' 0.000' -0.001' -0.001' 0.006'

01/26/2012 0.008' 0.002' 0.008' 0.003' -0.010'02/09/2012 -0.021' -0.001' -0.021' -0.002' -0.020'02/16/2012 -0.019' 0.002' -0.018' -0.005' 0.005'02/23/2012 -0.005' 0.004' -0.004' -0.002' 0.010'02/29/2012 0.005' 0.008' 0.007' -0.003' 0.004'03/09/2012 -0.003' 0.010' 0.000' -0.007' 0.010'03/21/2012 -0.001' 0.000' -0.001' 0.003' 0.003'

Date Offset Difference

Station Difference

Northing Difference

Easting Difference

Elevation Difference

O\S= R313.910' STA= 4+69.786' N=1719033.377' E=6466953.565' EL=135.063'

MS14

O\S= R45.174' STA= 5+60.285' N=1718804.046' E=6466786.785' EL=122.935'

MS10

O\S= R260.158' STA= 5+85.280' N=1718986.726' E=6466922.697' EL=132.647'

MS13

MS12

O\S= R95.696' STA= 5+42.196' N=1718846.837' E=6466819.166' EL=123.866'

MS11

O\S= R135.461' STA= 5+28.271' N=1718880.612' E=6466844.356' EL=125.749'

Monitoring StationReference Position

01/26/2012 -0.008' -0.010' -0.011' 0.007' -0.004'02/09/2012 -0.002' -0.001' -0.003' 0.000' -0.027'02/16/2012 -0.006' 0.001' -0.006' -0.003' 0.010'02/23/2012 0.002' -0.002' 0.001' 0.003' 0.009'02/29/2012 0.012' -0.003' 0.010' 0.007' 0.002'03/09/2012 0.003' 0.006' 0.004' -0.005' 0.014'03/21/2012 -0.003' 0.001' -0.003' -0.002' 0.010'

01/26/2012 0.001' -0.004' -0.004' 0.003' -0.012'02/09/2012 0.017' 0.000' 0.012' 0.003' -0.030'02/16/2012 0.010' 0.002' 0.006' 0.000' 0.004'02/23/2012 0.012' -0.003' 0.006' 0.005' 0.004'02/29/2012 0.018' -0.006' 0.011' 0.009' 0.002'03/09/2012 0.018' -0.002' 0.012' 0.006' 0.005'03/21/2012 0.014' 0.000' 0.010' 0.003' 0.004'

01/26/2012 -0.013' -0.007' -0.014' 0.003' -0.002'02/09/2012 -0.013' -0.017' -0.017' 0.012' -0.010'02/16/2012 -0.018' -0.009' -0.019' 0.003' 0.001'02/23/2012 -0.002' 0.010' 0.002' -0.010' 0.019'02/29/2012 -0.007' -0.002' -0.007' 0.000' 0.005'03/09/2012 -0.007' 0.004' -0.005' -0.006' 0.005'03/21/2012 -0.011' 0.000' -0.010' -0.003' 0.005'

01/26/2012 -0.013' -0.012' -0.015' 0.008' -0.003'02/09/2012 -0.002' -0.022' -0.008' 0.021' -0.020'02/16/2012 -0.008' 0.003' -0.007' -0.005' 0.002'02/23/2012 0.009' 0.004' 0.010' -0.001' 0.015'02/29/2012 0.006' -0.003' 0.005' 0.005' 0.000'03/09/2012 0.006' 0.004' 0.008' -0.001' 0.001'03/21/2012 0.002' 0.000' 0.002' 0.001' 0.010'

01/26/2012 -0.017' -0.018' -0.022' 0.012' -0.004'02/09/2012 -0.017' -0.022' -0.023' 0.016' -0.022'02/16/2012 -0.012' 0.004' -0.010' -0.007' 0.003'02/23/2012 -0.010' 0.029' -0.002' -0.031' 0.003'02/29/2012 0.010' -0.017' 0.005' 0.018' 0.006'03/09/2012 0.012' 0.003' 0.012' 0.001' 0.007'03/21/2012 -0.002' 0.001' -0.002' -0.001' 0.005'

Date Offset Difference

Station Difference

Northing Difference

Easting Difference

Elevation Difference

MS19

O\S= R257.953' STA= 7+44.415' N=1719062.180' E=6466674.780' EL=128.507'

O\S= R74.056' STA= 7+56.424' N=1718890.307' E=6466608.283' EL=122.284'

O\S= R153.536' STA= 7+55.527' N=1718965.874' E=6466632.926' EL=125.933'

MS17

O\S= R112.035' STA= 7+50.715' N=1718924.836' E=6466625.096' EL=123.828'

MS15

MS18

O\S= R199.925' STA= 7+56.000' N=1719010.282' E=6466646.360' EL=126.882'

MS16

Monitoring StationReference Position

01/26/2012 -0.005' -0.003' -0.006' 0.004' -0.008'02/09/2012 0.004' 0.009' 0.006' -0.005' -0.043'02/16/2012 -0.005' 0.002' -0.005' -0.001' 0.007'02/23/2012 -0.029' -0.009' -0.031' 0.002' -0.010'02/29/2012 0.008' 0.004' 0.008' 0.001' 0.003'03/09/2012 0.007' -0.007' 0.004' 0.011' -0.002'03/21/2012 -0.002' 0.012' 0.001' -0.009' 0.003'

01/26/2012 0.003' 0.005' 0.005' -0.005' -0.015'02/09/2012 0.018' 0.004' 0.019' 0.000' -0.029'02/16/2012 0.014' 0.001' 0.014' 0.002' -0.001'02/23/2012 0.000' -0.002' 0.000' 0.000' 0.000'02/29/2012 -0.005' 0.010' -0.001' -0.013' 0.000'03/09/2012 -0.003' 0.012' 0.002' -0.014' 0.006'03/21/2012 -0.003' 0.002' -0.002' -0.004' 0.009'

01/26/2012 -0.009' 0.008' -0.006' -0.010' -0.004'02/09/2012 0.017' 0.005' 0.018' -0.001' -0.025'02/16/2012 0.013' 0.005' 0.014' -0.001' -0.008'02/23/2012 0.005' 0.010' 0.008' -0.008' 0.000'02/29/2012 -0.008' 0.005' -0.006' -0.008' 0.000'03/09/2012 0.008' -0.008' 0.005' 0.010' 0.001'03/21/2012 0.002' 0.002' 0.003' -0.001' 0.012'

01/26/2012 0.002' -0.014' -0.002' 0.015' -0.001'02/09/2012 0.005' 0.013' 0.009' -0.010' -0.036'02/16/2012 0.020' -0.019' 0.014' 0.024' 0.003'02/23/2012 0.013' -0.002' 0.012' 0.007' 0.003'02/29/2012 0.007' -0.013' 0.003' 0.014' 0.001'03/09/2012 0.000' -0.004' -0.001' 0.004' 0.006'03/21/2012 0.003' 0.001' 0.003' 0.000' 0.007'

01/26/2012 -0.007' -0.002' -0.007' 0.001' 0.006'02/09/2012 -0.012' -0.002' -0.011' -0.002' -0.019'02/16/2012 0.013' 0.008' 0.015' -0.003' 0.006'02/23/2012 0.017' 0.010' 0.020' -0.004' -0.001'02/29/2012 -0.010' -0.011' -0.012' 0.008' 0.007'03/09/2012 0.005' 0.007' 0.007' -0.005' 0.007'03/21/2012 -0.006' -0.002' -0.006' 0.000' 0.002'

Easting Difference

Elevation DifferenceDate Offset

DifferenceStation

DifferenceNorthing

Difference

MS20

O\S= R239.073' STA= 10+35.128' N=1719131.173' E=6466391.744' EL=128.432'

MS21

O\S= R83.317' STA= 9+54.546' N=1718958.439' E=6466422.014' EL=122.619'

MS24

MS22

O\S= R133.224' STA= 10+78.918' N=1719013.3534' E=6466413.697' EL=123.711'

MS23

O\S= R275.287' STA= 10+54.316' N=1719171.471' E=6466384.270' EL=135.160'

O\S= R196.338' STA= 10+08.685' N=1719082.484' E=6466404.184' EL=128.305'

Monitoring StationReference Position

01/26/2012 -0.013' 0.006' -0.011' -0.010' -0.013'02/09/2012 -0.019' -0.001' -0.019' -0.005' -0.032'02/16/2012 0.007' -0.004' 0.005' 0.005' -0.001'02/23/2012 -0.040' -0.032' -0.048' 0.018' 0.007'02/29/2012 -0.027' -0.034' -0.035' 0.024' 0.006'03/09/2012 0.008' 0.001' 0.008' 0.001' -0.010'03/21/2012 -0.001' 0.010' 0.002' -0.010' 0.005'

01/26/2012 0.014' 0.000' -0.013' -0.004' -0.005'02/09/2012 0.014' 0.001' -0.013' -0.005' -0.015'02/16/2012 -0.011' 0.006' 0.013' -0.002' 0.009'02/23/2012 0.025' -0.036' -0.034' 0.027' -0.014'02/29/2012 0.025' -0.020' -0.030' 0.012' 0.014'03/09/2012 -0.011' 0.003' 0.012' 0.001' 0.007'03/21/2012 0.001' -0.007' -0.003' 0.007' 0.006'

Date Offset Difference

Station Difference

Northing Difference

Easting Difference

Elevation Difference

O\S= L8.070' STA= 11+83.498' N=1718909.836' E=6466271.621' EL=122.124'

MS26

O\S= R31.427' STA= 10+57.149' N=1718939.637' E=6466308.584' EL=122.058'

MS25