Amendment 0003 GOE1 Levee Site Maps-amended.pdf

Item 120 Whitham Drainage District

Approximate Boundary Swan Lake

Wildlife Refuge Approximate Boundary

Little Compton Lake Conservation Area

0+00 (R/S Ramp)

14+38 - L/S Ramp

65+92 - Co Rd

93+78 - Int L

105+07 - Int L

150+58 - L/S Ramp 210+38 Ramps

245+77 Ramps

270+73 L/S Ramp

285+10 L/S Ramp

329+41 Ramps

357+40

367+23

24" SP

359+38 To 371+38 Bank Stabilization

405+15

394+38 L/S Ramp

437+88 4' x 4' Box

453+13 Ramps

462+63 & 465+63 Pipelines

481+63

48" SP

482+38 4' x 4' Box

484+38 End Sta.

368+13 - Ramps

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

Garden of Eden Drainage District - Item No. 139 Sectin 1 Damage Map

0 1 20.5 Miles

L/S Slope Failure 134+35 to 137+00

Breach 6+40 to 9+30 Breach

4+50 to 5+90

R/S Slope Failure 83+30 to 87+80

Breach 80+60 to 82+40

Breach 56+00 to 57+80

R/S Slope Failure 98+15 to 100+40

Breach 90+10 to 93+45

2 Breaches 442+40 to 444+65

Breach 449+00 to 449+90

Compromised High Ground Erosion Approx. 500' East of End Station Tie-In

LANDSIDE SLOPE SOD KILL

DAMAGE STATIONS

65+95 to 80+60 93+45 to 134+35

137+00 to 442+40 444+65 to 449+00 449+90 to 484+38

ADDITIONAL DAMAGE LOCATIONS

0+00 to 4+50 - Crown & L/S Slope Erosion

5+90 to 6+40 - L/S Slope Erosion 9+30 to 56+00 - Crown & L/S Slope Erosion

57+80 to 65+90 - Crown & L/S Slope Erosion 82+40 to 90+10 - Crown & L/S Slope Erosion

405+15 to 442+40 - R/S Slope Erosion 444+65 to 449+00 - R/S Slope Erosion 449+90 to 484+38 - R/S Slope Erosion

Approximate Boundary Swan Lake

Wildlife Refuge

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

Garden of Eden Drainage District - Item No. 139 Sectin 1 B-1 Site Map

0 0.1 0.20.05 Miles

Breach 6+40 to 9+30

Breach 4+50 to 5+90

IN-PLACE REPAIRS:

Levee Constructioin will be along pre-existing alignment for both breaches

INITIAL BORROW:

Hathed Area indicates sand material borrow located in the open area within the wooded area.

Borrow to be taken evenly over designated area and not disturbing any trees.

Borrow to be utilized in the filling of scoured areas.

Borrow Area is void of trees.

(Approx. 1.6 AC)

BORROW:

Hathed Area indicates borrow material to be utilized after Initial borrow site has been exhausted of sand materials. Borrow to be taken evenly within flagged areas located in the borrow field leaving no ponding areas.

(Approx. 73 AC)

GENERAL NOTES:

Contractor will access from county road then down dirt access road to construction site.

BORROW:

Cross-Hathed Area indicates borrow material to be utilized after Initial borrow site has been exhausted of sand materials and hatched borrow site. Borrow to be taken evenly within flagged areas located in the borrow field leaving no ponding areas.

(Approx. 28 AC)

REPAIR DESCRIPTIONS:

Staging Area Will Be

Within The Limits of 200' Landward From The

Construction Site

Approximate Boundary Swan Lake

Wildlife Refuge

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

Garden of Eden Drainage District - Item No. 139 Sectin 1 B-2 Site Map

0 0.2 0.40.1 Miles

L/S Slope Failure 134+35 to 137+00

R/S Slope Failure 83+30 to 87+80

Breach 80+60 to 82+40

Breach 56+00 to 57+80

R/S Slope Failure 98+15 to 100+40

Breach 90+10 to 93+45

Borrow For Repairs At Station 56+00 to 57+80

Borrow to be taken evenly from flagged areas located within designated borrow field.

(Approx. 33.4 AC)

Borrow For Repairs At Station 56+00 to 57+80

Borrow to be taken evenly from flagged areas located within designated borrow field after other borrow field has been exhausted.

No disturbance of trees will be allowed.

(Approx. 48.0 AC)

GENERAL NOTES:

Contractor will access from county road then along the landside levee toe staying within 200' of the toe-line to each construction site.

REPAIR DESCRIPTIONS:

Staging Area Will Be Within The Limits Of 200'

Landward From The Construction Site

Cross-Hatched Borrow Borrow to be taken evenly from flagged areas located within designated borrow field.

No disturbance of trees will be allowed.

Borrow Area is for repairs starting at Station 80+60 and going Westward.

(Approx. 42.6 AC)

Approximate Boundary Swan Lake

Wildlife Refuge

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

Garden of Eden Drainage District - Item No. 139 Sectin 1 B-3 Site Map

0 0.15 0.30.075 Miles

2 Breaches 442+40 to 444+65

Breach 449+00 to 449+90

Compromised High Ground Erosion Approx. 500' East of End Station Tie-In

BORROW:

Hatched Area indicates borrow material to utilized evenly over the flagged area in the borrow field.

(Approx. 34.0 AC)

BORROW:

Cross-Hatched Area indicates borrow material to utilized evenly over the flagged area in the borrow field.

(Approx. 12.0 AC)

REPAIR DESCRIPTIONS:

Staging Area Will Be

Within The Limits Of 200' Landward From The

Construction Site

GENERAL NOTES:

Contractor will access from county road then down dirt access to construction site.

Borrow Areas are to be utilized in relationship to proximity of the damages.

12'

1' V. on 25' H.

1' V. on 3' H.1' V. on 3' H.

1' V. on 50' H.'

1' V. on 3' H.

50' Crest Elev. Approx. 670

Approx. Elev. 617

Natural Ground Approx. Elev. 650

Natural Ground Approx. Elev. 656

Extent of Foundation Scour

TYPICAL SECTION

Breach Station 6+40 to 9+30

12'

1' V. on 3' H.

1' V. on 50' H.

1' V. on 3' H.

1' V. on 3' H.

50'

Natural Ground Approx. Elev. 653

Natural Ground Approx. Elev. 651

Riverside Landside

Extent of Foundation Scour

Approx. Elev. 613

Landside Riverside

TYPICAL SECTION

Breach Station 56+00 to 57+80

Crest Elev. Approx. 669

Drawing Not To Scale

Drawing Not To Scale

*Approx. Elev. 651

*Note: Water Surface at Time of 6/18/19 Damage Assessment Survey

*Approx. Elev. 650

*Note: Water Surface at Time of 6/18/19 Damage Assessment Survey

30'

1' V. on 30' H.

1' V. on 3' H.

Garden of Eden Drainage District - Section 1 C-1 Drawing

General Note:

Contractor discretion to displace water by fill placement or pumping activities

General Note:

Contractor discretion to displace water by fill placement or pumping activities

Excavate Failed Levee Embankment Slope

Existing Grade Lines

Existing Applicable Levee Slope (No Damage)

Re-Construct Levee Embankment With Stability Berm

20'

C/L

Drawing Not To Scale

1' V. on 20' H.

Levee Embankment Slope Failure (Slide)

Damage Line

6' 6'

1' V. on 3' H.

1' V. on 3' H.

DAMAGE LOCATIONS

Riverside Slope Failure (Slide)

Stations 83+30 to 87+80 & 98+15 to 100+40 Landside Slope Failure (Slide)

Station 134+35 to 137+00

TYPICAL REPAIR SECTION

Landside and/or Rvierside Slope Failures (Slides)

Garden of Eden Drainage District - Section 1 C-2 Drawing

Landward Setback C/L

6' 6' 3' Impervious Layer

2' Impervious Layer

Existing Ground

Landside Riverside

Drawing Not To Scale

6' 6'

Landward Setback C/LLandside Riverside

Sand Lens Cut-Off Excavate Sand Deposition

Materials And Backfill With Impervious Materials

4'

6'1' V. on 1' H. 1' V. on 1' H.

3' Impervious Layer

1' V. on 3' H.

Side Slopes

2' Impervious Layer

Depth Of Sand Deposition Materials Vary

Drawing Not To Scale

Random Fill

Random Fill

1' V. on 3' H.

Side Slopes

TYPICAL REPAIR SECTION

Breach In-Place Repair

TYPICAL REPAIR SECTION

Breach In-Place Repair w/ Sand Lens Cut-Off

Garden of Eden Drainage District - Section 1 C-3 Drawing

Amendment 0001: Added drawing