SHEET · sheet pile weir submerged berm (typical) intercept dd33 @ sta. 16+89 intercept dd39 @ sta. 2+32 intercept main tile @ sta. 159+75 waste topsoil outside of pool area ... trench

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

2

1

2

2

2

3

2

4

2

5

2

6

2

7

2

8

2

9

3

0

3

1

3

2

3

3

3

4

3

5

3

63

7

3

8

3

9

3

9

-1

0

1

2

3

4

5

6

7

7

-

0

0

1

2

3

4

5

5

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

590TH ST

590TH ST590TH ST590TH ST590TH ST

590TH ST

590TH ST590TH ST

590TH ST

590TH ST

580TH ST


580TH ST

580TH ST580TH ST

580TH ST

580TH ST

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

21083-GRADING SCHEMATIC

THIS DOCUMENT IS THE PROPERTY OF I & S GROUP, INC.AND MAY NOT BE USED, COPIED OR DUPLICATEDWITHOUT PRIOR WRITTEN CONSENT.

DATE

REVISION SCHEDULE

DESCRIPTION BY

PROJECT NO.

CAD FILE NAME

DRAWN BY

DESIGNED BY

ORIGINAL ISSUE DATE

CLIENT PROJECT NO.

REVIEWED BY

PROJECT

SHEET

TITLE

BUENA VISTA COUNTY IOWA

SITEPLAN

2

-BV913529C

-NJO/BAB/CTT

-BAB

-IDD

09/11/18

IDALSDD101 CREP

WETLANDDEVELOPMENT

17-21083

XX-XX SHEET TITLE

300 PROJ. NO (no year) XX-XX

0

SCALE IN FEET

300 600

CRUSH AND BURY DD101

LATERAL 5 EXISTING TILE

AND DD33 EXISTING TILE

RELAY TILE THROUGH

PROPOSED ALIGNMENT



AND DD39 EXISTING TILE

EASEMENT BOUNDARY

RELAY TILE THROUGH

PROPOSED ALIGNMENT

RELAY TILE THROUGH

PROPOSED ALIGNMENT

EXISTING DD101 MAIN TILE

EXISTING DD101 LATERAL 7 TILE


ROAD CULVERT

AUXILIARY SPILLWAY

F+I 36" CMP TILE EXTENSION




F+I 18" CMP

TILE EXTENSION

LEGEND

BORROW AREA

DEEP POOL

SHALLOW POOL

POOL GRADING AREA

SUBMERGED BERMS

DIKE

INTERCEPT DD33 MAIN TILE

@ STA. 16+89

INTERCEPT DD39

@ STA. 2+32

INTERCEPT MAIN TILE

@ STA. 159+75

DD101 LATERAL 5 TILE STA 15+38 =

DD33 MAIN TILE STA. 15+49

DD39 MAIN TILE STA. -12+28 =

DD101 LATERAL 4 STA. 35+53

F+I 30 LF 18" CMP

SURFACE DRAIN

(NORTH SIDE OF BERM)


EXISTING MAIN TILE





SOIL BORING

(TYPICAL)

11/19/18 SUBMERGED BERMS BAB

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

2

1

2

2

2

3

2

4

2

5

2

6

2

7

2

8

2

9

3

0

3

1

3

2

3

3

3

4

3

5

3

63

7

3

8

3

9

3

9

-1

0

1

2

3

4

5

6

7

7

-

0

0

1

2

3

4

5

5

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

210T

H A

VE

590TH ST


590TH ST

590TH ST590TH ST

590TH ST

590TH ST

580TH ST


580TH ST

580TH ST580TH ST

580TH ST

580TH ST

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

200T

H A

VE

21083-GRADING SCHEMATIC


DATE

REVISION SCHEDULE

DESCRIPTION BY

PROJECT NO.

CAD FILE NAME

DRAWN BY

DESIGNED BY

ORIGINAL ISSUE DATE

CLIENT PROJECT NO.

REVIEWED BY

PROJECT

SHEET

TITLE


GRADINGPLAN

3

-BV913529C

-NJO/BAB/CTT

-BAB

-IDD

09/11/18

IDALSDD101 CREP

WETLANDDEVELOPMENT

17-21083

XX-XX SHEET TITLE


0

SCALE IN FEET

300 600

POOL AREA EXCAVATED TO ELEV. 1257'

THEN GRADED TO EXISTING SURFACE @ 4:1 SLOPE

EASEMENT BOUNDARY

EXISTING DD101 LATERAL 4

/DD39 TILE

EXISTING DD101 MAIN TILE



ROAD CULVERT

AUXILIARY SPILLWAY





F+I 18" CMP

TILE EXTENSION

LEGEND

BORROW AREA

DEEP POOL

SHALLOW POOL

POOL GRADING AREA

SUBMERGED BERMS

EXISTING FENCE

FENCE CUT & REPAIR

FENCE REMOVAL

BORROW AREA FINISHED SURFACE ELEV. FROM 1256.5' TO 1257'

THEN GRADED TO EXISTING SURFACE @ 4:1 SLOPE

AUXILIARY BORROW AREADIKE

SHEET PILE WEIR

SUBMERGED BERM

(TYPICAL)

INTERCEPT DD33

@ STA. 16+89

INTERCEPT DD39

@ STA. 2+32

INTERCEPT MAIN TILE

@ STA. 159+75

WASTE TOPSOIL OUTSIDE

OF POOL AREA

FILL / WASTE

TOPSOIL

FILL / WASTE

TOPSOIL

SURFACE CHANNEL DETAIL

EXISTING GROUND SURFACE

4' BOTTOM

NTS

10' TOP

4

:

1

4

:

1

2

:

1

2

:

1

SUBMERGED BERM DETAIL

10' TOP

NTS

6

:

1

6

:

1

BEGIN SURFACE CHANNEL ELEV. 1257.5'

END SURFACE CHANNEL ELEV. 1258.5'

EXISTING DD101 LATERAL 5

/DD33 TILE

F+I 30LF OF 18" CMP

SURFACE DRAIN

OPEN EXISTING BERM

CONSTRUCT DIVERSION BERM

THIS SIDE ONLY

SURFACE CHANNEL

GRADE 0.07%

SURFACE CHANNEL

GRADE 0.17%

SURFACE CHANNEL

GRADE 0.19%

SURFACE CHANNEL

GRADE 0.09%

SILT FENCE (TYPICAL)

REMOVE EXISTING

STRUCTURE (TYPICAL)

10' TOP

4

:

1

4

:

1

DIVERSION BERM

11/13/18 SUBMERGED BERMS & DETAIL BAB

CONSTRUCT FROM POOL GRADING WASTE MATERIAL

ELEV: 1257.50'

-

0

0

1

2

3

4

5

6

7

8

9

1

0

1

1

1

2

1

3

1

4

-0

0

1

2

3

4

4

1

2

6

0

R

4

7

'

R

2

6

'

1

2

6

0

1

2

6

4

1256

1

2

5

6

1

2

5

4

1

2

5

4

1220

1225

1230

1235

1240

1245

1250

1255

1260

1265

1270

1220

1225

1230

1235

1240

1245

1250

1255

1260

1265

1270

0+00

12

65

.0

0+50

12

64

.0

12

65

.0

6

1+00

12

62

.8

12

61

.5

0

1+50

12

61

.7

12

61

.5

0

2+00

12

61

.2

12

65

.2

4

2+50

12

60

.7

12

65

.2

7

3+00

12

60

.2

12

65

.2

9

3+50

12

59

.9

12

65

.3

1

4+00

12

58

.8

12

65

.3

4

4+50

12

57

.8

12

65

.4

1

5+00

12

57

.2

12

65

.4

9

5+50

12

57

.3

12

65

.5

8

6+00

12

56

.8

12

65

.6

6

6+50

12

56

.3

12

65

.7

4

7+00

12

56

.0

12

65

.8

2

7+50

12

55

.9

12

65

.9

1

8+00

12

55

.8

12

65

.9

9

8+50

12

55

.7

12

58

.0

0

9+00

12

55

.7

12

66

.0

0

9+50

12

55

.8

12

65

.9

5

10+00

12

51

.5

12

65

.9

1

10+50

12

56

.6

12

65

.8

6

11+00

12

55

.5

12

65

.8

2

11+50

12

55

.5

12

65

.7

8

12+00

12

55

.5

12

65

.7

3

ELEV:1265.00

STA:0+00

ELEV:1265.07

STA:0+54

ELEV:1261.49

STA:0+62

ELEV:1261.50

STA:1+62

ELEV:1265.21

STA:1+71

ELEV:1254.88

STA:2+08

ELEV:1251.20

STA:4+82

ELEV:1250.00

STA:6+86

ELEV:1249.66

STA:8+80

ELEV:1249.66

STA:9+66

ELEV:1245.51

STA:9+79

ELEV:1245.51

STA:10+10

ELEV:1249.46

STA:10+50

ELEV:1257.97

STA:2+24

ELEV:1255.45

STA:4+13

ELEV:1253.00

STA:8+38

ELEV:1253.00

STA:8+67

ELEV:1261.23

STA:1+99

ELEV:1266.00

STA:8+99

ELEV:1265.00

STA:8+96

ELEV:1266.00

STA:8+07

ELEV:1265.00

STA:8+10

21083-BERM PROFILES


DATE

REVISION SCHEDULE

DESCRIPTION BY

PROJECT NO.

CAD FILE NAME

DRAWN BY

DESIGNED BY

ORIGINAL ISSUE DATE

CLIENT PROJECT NO.

REVIEWED BY

PROJECT

SHEET

TITLE


-BV913529C

-CTT

-BAB

-IDD

09/11/18

IDALSDD101 CREP

WETLANDDEVELOPMENT

17-21083

XX-XX SHEET TITLE


TRENCHDRAIN-CORE

TRENCH PLANAND PROFILE

4

-

-

-

-

0

SCALE IN FEET

50 100

XX-XX SHEET TITLE

CONSTRUCTED TOP OF DIKE

WATER CONTROL STRUCTURE

594 LF 5" PCPT

CORE TRENCH

SETTLED TOP OF DIKE

AUXILIARY SPILLWAY

STA. 1+12 ON DIKE ALIGNMENT

BOTTOM WIDTH: 100'

SIDE SLOPES: 3:1

363 LF 5" PCPT

20 LF 6" CMP W/

ANIMAL GUARD

20 LF 6" CMP W/

ANIMAL GUARD

-1.2

4%

-0.57%

0.11%

EXISTING SURFACE

E

A

S

E

M

E

N

T

B

O

U

N

D

A

R

Y

EXISTING SURFACE

CONSTRUCTED DIKE SURFACE

C

4

9

TRENCH DRAIN

TRENCH DRAIN

EXCAVATE CHANNEL TO ELEV. 1254'

BOTTOM WIDTH: 12'

SIDE SLOPES: 3:1

GROUTED

RIPRAP

SPILLWAY STA. 2+27

ELEV. 1261.50'

SPILLWAY STA. 4+56

ELEV. 1260.50'

SPILLWAY STA. 2+50

ELEV. 1261.41'

SPILLWAY STA. 1+98

ELEV. 1261.50'

SPILLWAY STA. 1+61

ELEV. 1260.70'

SPILLWAY STA. 0+00

ELEV. 1258.50'

TRENCH DRAIN

TRENCH DRAIN

EXISTING CULVERT

END CAP,

SOIL TIGHT

STRIP AND TOPSOIL SPILLWAY

THROUGH SHADED AREA

EXISTING TILE

EXISTING SURFACE INTAKE

EXISTING REROUTED

OPEN DITCH

PROTECT EXISTING

TILE OUTLET

F+I 20LF OF 6" CMP

W/ ANIMAL GUARD

FOR EACH OUTLET

11/19/18 REVISED LANGUAGE & CHANNEL BAB

11

12

13

14

15

16

17

18

19

20

21

21

1

2

6

0

1

2

7

0

1

2

5

4

1230

1235

1240

1245

1250

1255

1260

1265

1270

1275

1280

1230

1235

1240

1245

1250

1255

1260

1265

1270

1275

1280

12+50

12

55

.5

12

65

.6

9

13+00

12

55

.5

12

65

.6

4

13+50

12

55

.5

12

65

.6

0

14+00

12

55

.6

12

65

.5

5

14+50

12

55

.9

12

65

.5

1

15+00

12

56

.2

12

65

.4

6

15+50

12

56

.7

12

65

.4

2

16+00

12

58

.1

12

65

.3

7

16+50

12

59

.5

12

65

.3

3

17+00

12

61

.4

12

65

.2

8

17+50

12

63

.5

12

65

.2

4

18+00

12

63

.2

12

65

.1

9

18+50

12

63

.9

12

65

.1

5

19+00

12

63

.7

12

65

.1

0

19+50

12

63

.7

12

65

.0

6

20+00

12

64

.5

12

65

.0

2

ELEV:1249.57

STA:13+85

ELEV:1250.55

STA:15+52

ELEV:1254.35

STA:16+84

ELEV:1261.05

STA:16+94

ELEV:1253.84

STA:15+39

ELEV:1258.00

STA:16+70

ELEV:1265.00

STA:20+17

TRENCHDRAIN-CORE

TRENCH PLANAND PROFILE

5

0

SCALE IN FEET

50 100

XX-XX SHEET TITLE


21083-BERM PROFILES


DATE

REVISION SCHEDULE

DESCRIPTION BY

PROJECT NO.

CAD FILE NAME

DRAWN BY

DESIGNED BY

ORIGINAL ISSUE DATE

CLIENT PROJECT NO.

REVIEWED BY

PROJECT

SHEET

TITLE


-BV913529C

-CTT

-BAB

-IDD

09/11/18

IDALSDD101 CREP

WETLANDDEVELOPMENT

17-21083

XX-XX SHEET TITLE


CONSTRUCTED TOP OF DIKE

EXISTING SURFACE

419 LF 5" PCPT

CORE TRENCH

SETTLED TOP OF DIKE

0.11%

3

.1

6

%

EXISTING SURFACE

CONSTRUCTED DIKE SURFACE

TRENCH DRAIN

TRENCH DRAIN DETAIL

18" MIN.

12" MIN.

3"

FL ELEV

CORE TRENCH DETAIL

11

11

4' M

IN

.

EX

ISTIN

G G

RO

UN

D S

UR

FAC

E

12' UPSTREAM (TYP.)

10'

NTS

NTS

COMPACTED

EARTH BACKFILL

6' FROM DOWNSTREAM TOE

SHEET PILE

STRUCTURE

DOWNSTREAM

TOE OF DIKE

POROUS BACKFILL

±3'

5" PERFORATED

CORRUGATED POLYETHYLENE

DRAINAGE TUBING

CORE TRENCH DETAILS:

END CAP,

SOIL TIGHT

EASEMENT BOUNDARY

11/14/18 TRENCH DRAIN LENGTH BAB

1215

1220

1225

1230

1235

1240

1245

1250

1255

1260

1265

1270

1275

1215

1220

1225

1230

1235

1240

1245

1250

1255

1260

1265

1270

1275

7+75

1255.8

8+00

1255.8

1265.00

8+25

1255.7

1259.13

8+50

1255.7

1258.00

8+75

1255.7

1258.00

9+00

1255.7

1265.00

9+25

1255.8

ELEV:1265.00

STA:7+93

ELEV:1248.00

STA:7+93

ELEV:1240.00

STA:8+08

ELEV:1233.00

STA:8+18

ELEV:1233.00

STA:8+28

ELEV:1224.00

STA:8+28

ELEV:1224.00

STA:8+78

ELEV:1233.00

STA:8+78

ELEV:1233.00

STA:8+88

ELEV:1240.00

STA:8+98

ELEV:1248.00

STA:9+13

ELEV:1265.00

STA:9+13

ELEV:1264.25

STA:7+97

ELEV:1264.25

STA:7+93

ELEV:1265.00

STA:8+10

ELEV:1258.00

STA:8+28

ELEV:1251.00

STA:8+37

ELEV:1249.50

STA:8+37

ELEV:1249.50

STA:8+69

ELEV:1251.00

STA:8+69

ELEV:1264.25

STA:9+08

ELEV:1264.25

STA:9+13

ELEV:1265.00

STA:8+96

ELEV:1258.00

STA:8+78

31.5'

7'

50'

3

:

1

3

:

1

3

:

1

3

:

1

ELEV:1248.00

STA:8+08

ELEV:1240.00

STA:8+18

ELEV:1240.00

STA:8+88

ELEV:1248.00

STA:8+98

SHEET PILESTRUCTURE

6

-

-

-

-

XX-XX SHEET TITLE

21083-SHEET PILE PROFILES


DATE

REVISION SCHEDULE

DESCRIPTION BY

PROJECT NO.

CAD FILE NAME

DRAWN BY

DESIGNED BY

ORIGINAL ISSUE DATE

CLIENT PROJECT NO.

REVIEWED BY

PROJECT

SHEET

TITLE


-BV913529C

-CTT

-BAB

-IDD

09/11/18

IDALSDD101 CREP

WETLANDDEVELOPMENT

17-21083

XX-XX SHEET TITLE


SHEET PILE INSTALLATION NOTES:

SHEET PILING REQUIREMENTS

TYPICAL GROUTED RIPRAP DETAIL

1.5

'

METAL SHEET

PILING

GEOTEXTILE FABRIC

TOP OF GROUTED RIPRAP

0.3

'

MINIMUM ELASTIC SECTION MODULUS, Sx = 48 IN^3/FT.

MINIMUM GRADE OF STEEL ASTM A572 GR. 60.

SHEET PILING LENGTH = VARIES, SEE ELEVATION.

MINIMUM MOMENT OF INERTIA, Ix = 435 IN˄3/FT.

SHEETING WHICH MEETS THE REQUIREMENTS:

SKYLINE STEEL AZ 26-700 (OR APPROVED EQUIVALENT)

SHEET PILING NOTES1. SHEETING CHOICES NOT LISTED ABOVE MAY BE ALLOWED WITH

PRIOR APPROVAL OF ENGINEER, THIS ALLOWED SHEETING MUST

MEET ENGINEERS' DEFLECTION REQUIREMENTS.

2. CONTRACTOR IS RESPONSIBLE TO CONFIRM AND PROVIDE

INSTALLATION EQUIPMENT THAT IS COMPATIBLE WITH THE

SHEETING TO BE USED. SOME INSTALLATION METHODS MAY

WORK BETTER WITH HEAVIER SHEET PILE.

1. AFTER INSTALLATION, ANY HOLES LEFT IN SHEET PILE (LIFTING

HOOKS ETC.) SHALL BE CLOSED OFF TO NOT ALLOW WATER TO

FLOW THROUGH.

2. AFTER SHEETING AND CHANNEL INSTALLATION, ALL SHEETING IS

TO BE CUT TO CONFORM WITH 3:1 SLOPE AND REMOVE DAMAGE

CAUSED BY DRIVING.

3. ALL SHEETS ARE TO BE MARKED AND NUMBERED AT 1' INCREMENTS

PRIOR TO INSTALLATION.

4. THE CONTRACTOR SHALL KEEP A LOG TO VERIFY THAT CORRECT

DEPTH IS ACHIEVED FOR ALL SHEETS INSTALLED. THIS LOG SHALL

BE DELIVERED TO THE ENGINEER FOR REVIEW PRIOR TO

ACCEPTANCE.

NTS

MC 10 X 22

CAP CHANNEL

MIN. 3/8"

METAL SHEET

PILING

MC 10 X 22

CAP CHANNEL

1" DIA. A325 BOLT

WASHERS

TOP OF

GROUTED

RIPRAP

TYPICAL CHANNEL AND BOLT DETAILNTS

TYPICAL PLAN VIEW CHANNEL BOLT PLACEMENT

FLOW

DIRECTION

TYPICAL FRONT VIEW CHANNEL BOLT PLACEMENT

3

:1

S

L

O

P

E

CAP CHANNEL

SEE CAP CHANNEL AND BOLT DETAIL.

INSTALL ONE BOLT PER SHEET.

MITER CUT AND WELD CHANNEL

TO CONFORM TO 3:1 SLOPE.

CAP CHANNEL

FOR STABILITY

NTS

NTS

EXISTING GROUND

SETTLED ELEVATION

CONSTRUCTED ELEVATION

EXISTING SURFACE

TOP OF SHEET PILE

27.56" 27.56"

ACCEPTABLE CHANNEL SPLICE LOCATION

MIN. 12'-0" BETWEEN SPLICES

18.11"

* DIMENSIONS SHOWN ARE REPRESENTATIVE OF AZ 26-700 SHEET PILE

11/14/18 GROUTED RIPRAP DETAIL BAB

1210

1215

1220

1225

1230

1235

1240

1245

1250

1255

1260

1265

1270

1275

1280

1210

1215

1220

1225

1230

1235

1240

1245

1250

1255

1260

1265

1270

1275

1280

0+00

12

56

.2

12

51

.0

0

0+25

12

55

.6

12

51

.5

5

0+50

12

55

.8

12

52

.1

0

0+75

12

55

.9

12

51

.6

4

1+00

12

55

.7

12

51

.0

0

1+25

12

55

.7

12

57

.7

7

1+50

12

55

.7

12

57

.3

2

1+75

12

55

.8

12

54

.0

0

ELEV:1252.50

STA:0+68

ELEV:1251.00

STA:0+80

ELEV:1258.00

STA:1+14

ELEV:1257.70

STA:1+24

ELEV:1258.00

STA:1+33

ELEV:1256.20

STA:1+14

ELEV:1256.20

STA:1+24

ELEV:1252.28

STA:0+58

ELEV:1250.79

STA:0+59

ELEV:1250.94

STA:0+66

ELEV:1249.50

STA:0+78

ELEV:1251.00

STA:1+14

ELEV:1249.50

STA:1+14

1224.00

8

9

7+50

8+50

9+50

1

0+

50

1+

50

-3:1

-3:1

-3:1

-3:1

-10:1

1

2

5

5

-8:1

-8:1

-3

:1

-3

:1

21083-STILLING BASIN PROFILE


DATE

REVISION SCHEDULE

DESCRIPTION BY

PROJECT NO.

CAD FILE NAME

DRAWN BY

DESIGNED BY

ORIGINAL ISSUE DATE

CLIENT PROJECT NO.

REVIEWED BY

PROJECT

SHEET

TITLE


-BV913529C

-CTT

-BAB

-IDD

09/11/18

IDALSDD101 CREP

WETLANDDEVELOPMENT

17-21083

XX-XX SHEET TITLE


STILLING BASINPLAN AND PROFILE

7

BOTTOM OF SHEET PILE

GEOTEXTILE FABRIC

GEOTEXTILE FABRIC

GROUT ALL RIPRAP

IN THIS REACH

OPEN CHANNEL 26' BOTTOM

8:1 SIDE SLOPES

NOTES:1. FINISH TOP ELEVATION OF RIP RAP AND GROUT UPSTREAM OF WEIR

IS TO BE ELEV. 1257.7'. CONTRACTOR IS TO HAVE ENGINEER

REVIEW RIP RAP PRIOR TO GROUTING OPERATIONS.

2. EXCAVATION INSIDE STILLING BASIN (STA. 1+14 TO STA. 0+50) SHALL

BE REMOVED AFTER SHEET PILE, WALER, UPSTREAM RIP RAP, AND

WAVE BERM ARE PLACED. THEREAFTER NO HEAVY EQUIPMENT

SHALL BE PERMITTED ON WAVE BERM UPSTREAM OF STILLING

BASIN. THIS IS TO LIMIT SHEET PILE DEFLECTION.

TRENCH DRAIN

TRENCH DRAIN

TOP OF DIKE 8'

8'

34'

31.5'

WAVE BERM 30'

GROUTED

RIPRAP

GRADE TO EXISTING

CULVERT INVERT

11/19/18 REVISED OUTLET CHANNEL BAB

Documents

SHEET · sheet pile weir submerged berm (typical) intercept dd33 @ sta. 16+89 intercept dd39 @ sta. 2+32 intercept main tile @ sta. 159+75 waste topsoil outside of pool area ... trench