Plan_Sheet_C-300_-_Amendment_01.pdf

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SHEET ID

®of Engineers

US Army Corps

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380 380

-260 -240 -220 -200 -180 -160 -140 -120 -100 -80 -60 -40 -20 0 20 40 60 80

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KEY DETAIL A

KEY DETAIL B

0 020' 40' 20' 40'

TYPICAL CROSS SECTION

EXISTING GRADE

PROTECTED SIDE

B

/LC

/L

FROM KEY CONSTRUCTION

EXCAVATED MATERIAL

R T

B

WIDTH VARIES

TIE R-400 RIPRAP INTO RTB

THAN 1.5H:1V

NOT STEEPER

SLOPE VARIES

OF 2.5'

MIN. THICKNESS

R-400 RIPRAP

R-400 RIPRAP

1H:1V 1H:1V

FLOOD SIDE

TYPICAL CROSS SECTION

EXISTING GRADE

PROTECTED SIDEFLOOD SIDE

B

/LC

/L

FROM KEY CONSTRUCTION

EXCAVATED MATERIAL

R T

B

WIDTH VARIES

TIE R-400 RIPRAP INTO RTB

THAN 1.5H:1V

NOT STEEPER

SLOPE VARIES

OF 2.5'

MIN. THICKNESS

R-400 RIPRAP

R-400 RIPRAP

1H:1V 1H:1V

FLOOD SIDE LEVEE TOE

KEY CONSTRUCTION

EXCAVATED MATERIAL FROM

RTB

OF 2.5'

MIN. THICKNESS

R-400 RIPRAP

EXISTING GRADE

SCALE: NTS

B

HORIZONTAL OFFSET OF KEY = 50'C

KEY

HORIZONTAL SCALE:1"=20' VERTICAL SCALE:1"=20'

0 020' 40' 20' 40'

HORIZONTAL SCALE:1"=20' VERTICAL SCALE:1"=20'

SCALE: NTS

KEY CONSTRUCTION

EXCAVATED MATERIAL FROM

RTB

OF 2.5'

MIN. THICKNESS

R-400 RIPRAP

EXISTING GRADE

B C

KEY

HORIZONTAL OFFSET OF KEY = 50'

C-300

T Y

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1.5 H

1.5 H

1V

1V

C) THE KEY BOTTOM WIDTH SHALL BE 1.5', DIMENSION C.

FROM THE EXCAVATION POINT SHOWN IN THE KEY DETAIL, DIMENSION B.

B) THE DEPTH OF THE KEY SHALL BE 4 FEET BELOW EXISTING GRADE

POINT SHOWN IN THE KEY DETAIL.

THE RIGHT TOP BANK (RTB) TO THE BOTTOM OF KEY EXCAVATION

A) HORIZONTAL OFFSET OF KEY DISTANCE SHALL BE MEASURED FROM

NOTES:

C) THE KEY BOTTOM WIDTH SHALL BE 1.5', DIMENSION C.

FROM THE EXCAVATION POINT SHOWN IN THE KEY DETAIL, DIMENSION B.

B) THE DEPTH OF THE KEY SHALL BE 4 FEET BELOW EXISTING GRADE

POINT SHOWN IN THE KEY DETAIL.

THE RIGHT TOP BANK (RTB) TO THE BOTTOM OF KEY EXCAVATION

A) HORIZONTAL OFFSET OF KEY DISTANCE SHALL BE MEASURED FROM

NOTES:

SEE KEY DETAIL A

SEE KEY DETAIL B

SEE NOTE 6 BELOW.

WATER SURFACE ELEVATION

SEE NOTE 6 BELOW.

WATER SURFACE ELEVATION

MAX SLOPE 5H:1V

SLOPE TO DRAIN

MAX SLOPE 5H:1V

SLOPE TO DRAIN

GRUBBING & SNAGGING LIMITS

BASELINE STATION LIMITS FOR EACH OF THE SCOUR REPAIR SITES CAN BE FOUND ON SHEET G-002.

SNAGGING WITHIN THE START AND END LEVEE BASELINE STATION LIMITS FOR EACH OF THE SCOUR REPAIR SITES. THE APPROXIMATE LEVEE

SITE. UNLESS OTHERWISE DIRECTED BY THE CONTRACTING OFFICER THE CONTRACTOR SHALL ONLY BE REQUIRED TO PERFORM GRUBBING &

7) THE CONTRACTOR SHALL PERFORM GRUBBING & SNAGGING WITHIN THE LIMITS SHOWN IN THE TYPICAL CROSS SECTIONS AT EACH SCOUR REPAIR

SURFACE ELEVATION AT THE TIME OF CONSTRUCTION. STAGE HYDROGRAPHS ARE PROVIDED ON SHEET X-100.

SEA 1600801 SURVEY WAS COMPLETED AND IS SHOWN FOR REFERENCE ONLY AND SHOULD NOT BE USED TO DETERMINE OR ANTICIPATE THE WATER

6) THE WATER SURFACE ELEVATION SHOWN IN THE TYPICAL CROSS SECTIONS WAS THE WATER SURFACE ELEVATION AT THE TIME WHEN THE 2017

DURING THE PROJECT.

TYPICAL CROSS SECTIONS ARE BEING PROVIDED IN ORDER TO SHOW DIFFERENT EXISTING GRADE SCENARIOS THAT THE CONTRACTOR MAY SEE

5) THE TYPICAL CROSS SECTIONS PROVIDED SHOW THE SAME CONSTRUCTION REQUIREMENTS FOR REPAIRING ALL OF THE SCOUR SITES. TWO

EXCAVATED MATERIAL OBTAINED FROM THE KEY CONSTRUCTION IS SEEDED & MULCHED ACCORDING TO THE PROJECT SPECIFICATIONS.

4) CONTRACTOR SHALL ENSURE THE SPOIL AREAS LOCATED IN BETWEEN THE CHANNEL RIGHT TOP BANK AND FLOOD SIDE LEVEE TOE THAT RECEIVE

BE PLACED AS SEMI-COMPACTED BACKFILL AS SPECIFIED IN THE PROJECT SPECIFICATIONS.

RIGHT TOP BANK AND FLOOD SIDE LEVEE TOE SHALL NOT EXCEED A MAXIMUM FINAL THICKNESS OF 1'. THIS EXCAVATED MATERIAL SHALL ALSO

3) THE EXCAVATED MATERIAL OBTAINED FROM THE KEY CONSTRUCTION THAT IS PLACED IN THE SPOIL AREAS LOCATED IN BETWEEN THE CHANNEL

EXCAVATED MATERIAL OBTAINED FROM THE KEY CONSTRUCTION WHEN PLACED IN THE SPOIL AREAS SHALL BE NO STEEPER THAN 5H:1V.

IN THE SPOIL AREAS SHALL BE DETERMINED IN THE FIELD BY THE CONTRACTING OFFICER. HOWEVER THE MAX ALLOWABLE FINAL SLOPE OF THE

THE CHANNEL RIGHT TOP BANK FOR THE DURATION OF THE PROJECT. THE SPECIFIC GRADE OF THE EXCAVATED MATERIAL WHEN IT IS PLACED

LOCATED IN BETWEEN THE CHANNEL RIGHT TOP BANK AND FLOOD SIDE LEVEE TOE IS SLOPED TO DRAIN AWAY FROM THE LEVEE AND TOWARDS

2) CONTRACTOR SHALL ENSURE THAT THE EXCAVATED MATERIAL OBTAINED FROM THE KEY CONSTRUCTION THAT IS PLACED IN THE SPOIL AREAS

SCOUR REPAIR SITES. THE APPROXIMATE LEVEE BASELINE STATION LIMITS FOR EACH OF THE SCOUR REPAIR SITES CAN BE FOUND ON SHEET G-002.

BE TRANSITIONED DOWN TO ITS FULL DEPTH FROM EXISTING GRADE AT THE START AND END LEVEE BASELINE STATION LIMITS FOR EACH OF THE

1) THE RIPRAP KEY SHALL BE EXCAVATED TO ITS FULL DEPTH FOR THE ENTIRE LENGTH OF EACH OF THE SCOUR REPAIR SITES. THE KEY SHALL NOT

NOTES:

BASELINE STATION LIMITS FOR EACH OF THE SCOUR REPAIR SITES CAN BE FOUND ON SHEET G-002.

SNAGGING WITHIN THE START AND END LEVEE BASELINE STATION LIMITS FOR EACH OF THE SCOUR REPAIR SITES. THE APPROXIMATE LEVEE

SITE. UNLESS OTHERWISE DIRECTED BY THE CONTRACTING OFFICER THE CONTRACTOR SHALL ONLY BE REQUIRED TO PERFORM GRUBBING &

7) THE CONTRACTOR SHALL PERFORM GRUBBING & SNAGGING WITHIN THE LIMITS SHOWN IN THE TYPICAL CROSS SECTIONS AT EACH SCOUR REPAIR

SURFACE ELEVATION AT THE TIME OF CONSTRUCTION. STAGE HYDROGRAPHS ARE PROVIDED ON SHEET X-100.

SEA 1600801 SURVEY WAS COMPLETED AND IS SHOWN FOR REFERENCE ONLY AND SHOULD NOT BE USED TO DETERMINE OR ANTICIPATE THE WATER

6) THE WATER SURFACE ELEVATION SHOWN IN THE TYPICAL CROSS SECTIONS WAS THE WATER SURFACE ELEVATION AT THE TIME WHEN THE 2017

DURING THE PROJECT.

TYPICAL CROSS SECTIONS ARE BEING PROVIDED IN ORDER TO SHOW DIFFERENT EXISTING GRADE SCENARIOS THAT THE CONTRACTOR MAY SEE

5) THE TYPICAL CROSS SECTIONS PROVIDED SHOW THE SAME CONSTRUCTION REQUIREMENTS FOR REPAIRING ALL OF THE SCOUR SITES. TWO

EXCAVATED MATERIAL OBTAINED FROM THE KEY CONSTRUCTION IS SEEDED & MULCHED ACCORDING TO THE PROJECT SPECIFICATIONS.

4) CONTRACTOR SHALL ENSURE THE SPOIL AREAS LOCATED IN BETWEEN THE CHANNEL RIGHT TOP BANK AND FLOOD SIDE LEVEE TOE THAT RECEIVE

BE PLACED AS SEMI-COMPACTED BACKFILL AS SPECIFIED IN THE PROJECT SPECIFICATIONS.

RIGHT TOP BANK AND FLOOD SIDE LEVEE TOE SHALL NOT EXCEED A MAXIMUM FINAL THICKNESS OF 1'. THIS EXCAVATED MATERIAL SHALL ALSO

3) THE EXCAVATED MATERIAL OBTAINED FROM THE KEY CONSTRUCTION THAT IS PLACED IN THE SPOIL AREAS LOCATED IN BETWEEN THE CHANNEL

EXCAVATED MATERIAL OBTAINED FROM THE KEY CONSTRUCTION WHEN PLACED IN THE SPOIL AREAS SHALL BE NO STEEPER THAN 5H:1V.

IN THE SPOIL AREAS SHALL BE DETERMINED IN THE FIELD BY THE CONTRACTING OFFICER. HOWEVER THE MAX ALLOWABLE FINAL SLOPE OF THE

THE CHANNEL RIGHT TOP BANK FOR THE DURATION OF THE PROJECT. THE SPECIFIC GRADE OF THE EXCAVATED MATERIAL WHEN IT IS PLACED

LOCATED IN BETWEEN THE CHANNEL RIGHT TOP BANK AND FLOOD SIDE LEVEE TOE IS SLOPED TO DRAIN AWAY FROM THE LEVEE AND TOWARDS

2) CONTRACTOR SHALL ENSURE THAT THE EXCAVATED MATERIAL OBTAINED FROM THE KEY CONSTRUCTION THAT IS PLACED IN THE SPOIL AREAS

SCOUR REPAIR SITES. THE APPROXIMATE LEVEE BASELINE STATION LIMITS FOR EACH OF THE SCOUR REPAIR SITES CAN BE FOUND ON SHEET G-002.

BE TRANSITIONED DOWN TO ITS FULL DEPTH FROM EXISTING GRADE AT THE START AND END LEVEE BASELINE STATION LIMITS FOR EACH OF THE

1) THE RIPRAP KEY SHALL BE EXCAVATED TO ITS FULL DEPTH FOR THE ENTIRE LENGTH OF EACH OF THE SCOUR REPAIR SITES. THE KEY SHALL NOT

NOTES:

GRUBBING & SNAGGING LIMITS

GRUB & SNAG 15' PAST RTB

GRUB & SNAG 15' PAST RTB

OF BY OTHERS AT A LATER DATE.

LIMITS. THE DEBRIS SHALL THEN BE DISPOSED

LEVEE SLOPES WITHIN THE CONSTRUCTION ROW

STOCKPILES LOCATED ALONG THE FLOOD SIDE

SNAGGING DEBRIS IN THE EXISTING DEBRIS

CONTRACTOR SHALL PLACE ALL GRUBBING &

OF BY OTHERS AT A LATER DATE.

LIMITS. THE DEBRIS SHALL THEN BE DISPOSED

LEVEE SLOPES WITHIN THE CONSTRUCTION ROW

STOCKPILES LOCATED ALONG THE FLOOD SIDE

SNAGGING DEBRIS IN THE EXISTING DEBRIS

CONTRACTOR SHALL PLACE ALL GRUBBING & LEVEE TOE

FLOOD SIDE

B

A

FOR SOLICITATION - AMENDMENT 01