BB90_Plans_Advertisement_Set_11-08-22 Pg 1-15.pdf

PDF 13 MB Posted Dec 1, 2022

Attached to: Big Bend Left Abutment Collector Pipe System Federal contract opportunity
Solicitation number: W9128F23B0005
Issued by: Department of the Army Corps of Engineers Engineering District Omaha

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Written by GovTribe AI · Dec 28, 2023

This federal solicitation requests proposals for the Big Bend Left Abutment Collector Pipe System project. The contractor shall furnish all personnel, services, equipment, materials and other requirements necessary for Replacement of Left Abutment Collector Pipe near the toe of the dam. The work includes but is not limited to dewatering of the area, proper disposal of contaminated soil and water, excavation, removal and replacement of slotted and solid pipes, placement of 2 stage filter, installation of manholes, backfill, and seeding. The solicitation will utilize a two-step IFB process, with step one proposals due by January 4, 2023 at 2:00 PM Central Time. A site visit will be held on December 12, 2022 at 10:00 AM Central Time. The agency responsible for this project is the Department of the Army Corps of Engineers Engineering District Omaha.

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Other files attached to Big Bend Left Abutment Collector Pipe System, newest first.
File	Type	Posted
02 61 13 AM0003.pdf	PDF	Feb 3, 2023
01 22 00 AM0003 .pdf	PDF	Feb 3, 2023
02 81 00 AM0003.pdf	PDF	Feb 3, 2023
W9128F23B0005 AM0003.pdf	PDF	Feb 3, 2023
Am0002 - Extend Due Date and WD.pdf	PDF	Jan 26, 2023
Pre-Bid-2023 Sign In_W9128F23B0005.pdf	PDF	Jan 18, 2023
Pre-Bid-Site Visit-Agenda_W9128F23B0005.pdf	PDF	Jan 18, 2023
W9128F23B0005 - BB Left Abutment Am0001.pdf	PDF	Dec 22, 2022
W9128F23B0005 BB Left Abument Specs.pdf	PDF	Dec 1, 2022
BB90 Geotechnical Data Report STEP 1 Pg 1-268.pdf	PDF	Dec 1, 2022
BB90 Geotechnical Data Report STEP 1 Pg 685-804.pdf	PDF	Dec 1, 2022
BB90 Geotechnical Data Report STEP 1 Pg 269-562.pdf	PDF	Dec 1, 2022
BB90 Geotechnical Data Report STEP 1 Pg 563-684.pdf	PDF	Dec 1, 2022
BB90_Plans_Advertisement_Set_11-08-22 Pg 16-29.pdf	PDF	Dec 1, 2022
W9128F23B0005 - BB Left Abutment Step-1 IFB Solicitation.pdf	PDF	Dec 1, 2022

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S O

A T

N N

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A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

A L

V E

M B

E R

%PRODUCTION DATA 4%%PRODUCTION DATA 3%%PRODUCTION DATA 2%

%PRODUCTION DATA 1%

of Engineers

US Army Corps

Omaha District

G-001

C O

V E

G .D

G N

W9128F23B0005

W9128F23Cxxxx

SOLICITATION NO.:

CONTRACT NO.:

DATE: NOVEMBER 2022

(95% DRAWING SET)

STEP 1 SOLICITATION

MISSOURI RIVER

BIG BEND DAM, SOUTH DAKOTA

ABUTMENT COLLECTOR PIPE SYSTEM

REPLACEMENT OF LEFT

RESOURCE (FOR INFORMATION ONLY)

EXIST

BOP

EXISTING

FEET

ELEVATION

BOTTOM OF PIPE

PIEZOMETER

RELIEF WELL

INDEX LEGEND:

1. SHEET IDENTIFICATION NUMBERS: 2. DISCIPLINE DESIGNATORS:

M - 2 0 1

SHEET SEQUENCE NUMBER

w/ Level 2 Designator

DISCIPLINE DESIGNATOR

RESOURCE

TELECOMMUNICATIONS

ELECTRICAL

MECHANICAL

PROCESS

PLUMBING

FIRE PROTECTION

EQUIPMENT

INTERIORS

ARCHITECTURAL

STRUCTURAL

LANDSCAPE

CIVIL

GEOTECHNICAL

SURVEY / MAPPING

HAZARDOUS MATERIALS

GENERAL

Designator)

RELEASE 3.0 for Level 2

(see A/E/C CADD STANDARD

SHEET TYPE DESIGNATOR

3. SHEET TYPE DESIGNATORS:

FOR INFORMATION ONLY

3D REPRESENTATIONS

USER DEFINED

SCHEDULES & DIAGRAMS

DETAILS

LARGE-SCALE VIEWS

SECTIONS

ELEVATIONS

PLANS

GENERAL

E X A

N D V

Y M

A P

G-002

INDEX

GENERAL

CIVIL

ABBREVIATION LEGEND:

RESOURCE (FOR INFORMATION ONLY)

B B

G .D

G N

VICINITY MAP

NO SCALE

CHANNEL STABILIZATION RIPRAP - D/S LEFT ABUTMENT SUBDRAIN - 2010FIO-12BB90C-FIO_DRAWINGS.DGN

GEOLOGICAL PROFILE A-A' REPLACEMENT WELLSFIO-11BB90C-FIO_DRAWINGS.DGN

GEOLOGICAL PROFILE C-C' SUBSURFACE INVESTIGATIONFIO-10BB90C-FIO_DRAWINGS.DGN

GEOLOGICAL PROFILE B-B' SUBSURFACE INVESTIGATIONFIO-9BB90C-FIO_DRAWINGS.DGN

GEOLOGICAL PROFILE A-A' SUBSURFACE INVESTIGATIONFIO-8BB90C-FIO_DRAWINGS.DGN

SOIL BORING LOCATION MAPFIO-7BB90C-FIO_DRAWINGS.DGN

RELIEF WELL AND RELIEF WELL PIEZOMETER OBSERVATIONSFIO-6BB90C-FIO_DRAWINGS.DGN

EMBANKMENT FOUNDATION PIEZOMETERS LINE "H" STATION 121+00FIO-5BB90C-FIO_DRAWINGS.DGN

EMBANKMENT FOUNDATION PIEZOMETERS LINE "J" STATION 126+00FIO-4BB90C-FIO_DRAWINGS.DGN

RELIEF WELL MODIFICATION DETAILS (1966)FIO-3BB90C-FIO_DRAWINGS.DGN

RELIEF WELL MODIFICATION PROFILES (1966)FIO-2BB90C-FIO_DRAWINGS.DGN

RELIEF WELL MODIFICATION PLAN AND DETAIL PLAN (1966)FIO-1BB90C-FIO_DRAWINGS.DGN

DESCRIPTIONSHEET ID NO.DESIGN FILE

PIPE BEDDING AND BACKFILL DETAILSC-505BB90C-505.DGN

REPLACEMENT RELIEF WELL OUTFALL DETAILSC-504BB90C-504.DGN

EXISTING RELIEF WELL AND MANHOLE ABANDONMENT DETAILSC-503BB90C-503.DGN

EXISTING RELIEF WELL AND MANHOLE DETAILSC-502BB90C-502.DGN

NEW MANHOLE, RISER AND PIEZOMETER DETAILSC-501BB90C-501.DGN

24-INCH RCP EXTENSION - PLAN, SECTION, AND RIPRAP APRON DETAILSC-306BB90C-306.DGN

24" CMP EXTENSION (CULVERT "A") - PLAN (GRADING) AND PROFILEC-305BB90C-305.DGN

RW COLLECTOR PIPE REPLACEMENT & NEW OUTFALLS - PLAN, PROFILE & SECTIONS - SHEET 2 OF 2C-304BB90C-304.DGN

RW COLLECTOR PIPE REPLACEMENT & NEW OUTFALLS - PLAN, PROFILE & SECTIONS - SHEET 1 OF 2C-303BB90C-303.DGN

TOE DRAIN OUTFALL REPLACEMENT - PLAN, PROFILE AND SECTIONSC-302BB90C-302.DGN

TOE DRAIN REPLACEMENT - PLAN, PROFILE AND SECTIONC-301BB90C-301.DGN

DEMOLITION PLANC-300BB90C-300.DGN

WORK PLANC-201BB90C-201.DGN

EXISTING CONDITIONSC-101BB90C-101.DGN

GENERAL PLAN, SITE ACCESS, AND CONTROL DATAG-101BB90G-101.DGN

INDEX AND VICINITY MAPG-002BB90G-002.DGN

COVERG-001BB90G-001.DGN

DESCRIPTIONSHEET ID NO.DESIGN FILE

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

OHP

SEE NOTE 5

24" RCP STORM DRAIN

RISER 9

RISER 7

RISER 23

RISER 8

D340R

POWER POLES X3

GUY WIRES

RISER 2

OHP POWER POLE

POWER POLE

1400 1400

POWER POLES

POWER POLE

SERVICE TOE ROAD

OHP

8" SOLID HDPE 8" SOLID HDPE

OHP

RW-64A

RW-64B

RW-65

RW-65A

D250R

D560Ra

D560Rb D560Rb-12

E130R

E130Rb

E570R

E570Rb

H560Ra H560Rb

H560Rb-12

H810Ra-12 H810Rb H810Rba

J171Rb

J320Ra

J320Rb

J474Ra

J474Rb

J662Ra

J662Rb

PZ 26

PZ 27

PZ 28

PZ 29

PZ 30

PZ-18

PZ-18R

PZ-18R-12

PZ-19

PZ-20

PZ-20-12

PZ-21

PZ-22

PZ-24

RW-66A

RW-66

OHP

ELI

ELL

S E R

E T

O E R

O A

Y A C C

S R

O A

SPILLWAY ACCESS ROAD

S P

L W

A Y D

E A

C C

E S

S R

O A

PZ-25R

OHP

RISER 21

" P

E R

R A

D C

M P

O L

D P

12" PERFORATED CMP 12" PERFORATED CMP

POWER POLES

RISER 9

" P

E R

R A

D C

M P

24" CMP CULVERT "B"

RISER 7

HERRING BONE DRAIN AND RISERS

RISER 4

RW-68B

RW-68A

RW-67

" P

E R F . C

M P

O L

D P E

RISER 23

RISER 8

24" CMP CULVERT "A"

" P

E R

F O

R A

T E

D C

M P

8" PERFORATED CMP

POWER POLES X3

GUY WIRES

RISER-1

OHP POWER POLE

POWER POLE

RW-66B

RW-66C

RW-67A

RW-67B

RISER 3

MH-1

OW20-01OW20-02

" S

O L

D P E

O L

D P

8" S

D H

D P E

" S

O L

M P

OHP

MH-2

RW-68

SEE NOTE 5

DAM CREST / HWY 47

DAM

RES

T / H

W Y

SCALE: 1''=60'-0"

60' 0 60'

OHP

E X

G C

O N

C .D

G N

S6. ALL UTILITIES WERE LOCATED BY 811 CONTRACT.

S5. COMBINED GRID FACTOR IS: 0.999874125.

S4. CONTOUR INTERVAL IS 1 US SURVEY FOOT.

STATION SURVEY METHODS. FIELD SURVEY DATE: MAY 2020.

S3. TOPOGRAPHY IS DERIVED FROM GPS/RTK AND TOTAL

INFORMATION IS SHOWN ON SHEET G-101.

REFER TO LOCAL PROJECT DATUM. CONTROL POINT

S2. ELEVATIONS ARE REFLECTED IN US SURVEY FEET AND

POINT PD-1 AND PD-4.

DAKOTA SOUTH 4002. THEY ARE BASED ON CONTROL

(NAD 83) STATE PLANE COORDINATE SYSTEM FOR: SOUTH

FEET AND REFER TO THE NORTH AMERICAN DATUM OF 1983

S1. GRID COORDINATES ARE REFLECTED IN US SURVEY

SURVEY NOTES:

EXISTING CONDITIONS

DAM CREST / HWY 47

C-101

INFORMATION.

GEOSYNTHETIC MAT. SEE SHEET FIO-12 FOR ADDITIONAL

OF RELIEF WELL CHANNEL BENEATH THE GRAVEL-FILLED

FROM PREVIOUS CONTRACT IN BOTTOM AND WEST SLOPE

5. CONTRACTOR MAY ENCOUNTER STABILIZATION RIPRAP

PARAGRAPH 1.4.2.

AND IN SPECIFICATION 01 12 00 CONSTRUCTION GENERAL

BONE DRAINAGE AREA AS INDICATED ON THE DRAWINGS

4. NO DISTURBANCE WILL BE ALLOWED OVER THE HERRING

MATERIAL FOR DISPOSAL REQUIREMENTS.

SPECIFICATION 02 82 00, TITLED ASBESTOS-CONTAINING

ASBESTOS TREATED BITUMINOUS COATED PIPE. SEE

3, AND 4 ALONG WITH RELIEF WELL OUTFALLS HAVE

3. THE EXISTING 8", 12" AND 15" PERFORATED CMP, RISERS 1, 2,

NON-WORK AREAS.

INCLUDES FEATURES SHOWN IN WORK AREAS AND

REPLACED AT THE CONTRACTOR'S EXPENSE. THIS

DAMAGES TO THESE FEATURES WILL BE REPAIRED OR

SUBDRAINS NOT PART OF THIS CONTRACT. ANY

OUTFALLS, RELIEF WELLS, PIEZOMERS, RISERS AND

2. CONTRACTOR WILL PROTECT ALL MANHOLES, CASINGS,

GOVERNMENT.

REPAIRED BY THE CONTRACTOR AT NO COST TO THE

EXCAVATION OR CONSTRUCTION TO UTILITIES WILL BE

REQUIREMENTS. ANY DAMAGES INCURRED DURING

REFER TO SPECIFICATIONS FOR ADDITIONAL

FOR UTILITY LOCATION CLEARING PRIOR TO EXCAVATING.

SHALL BE PROTECTED. CONTRACTOR IS RESPONSIBLE

LOCATED NEAR THE PROPOSED EXCAVATION AREAS AND

1. OVERHEAD POWERLINES AND POWER POLES ARE

NOTES:

OVERHEAD POWER LINES

POWER POLEHERRING BONE DRAIN

MANHOLEHERRING BONE RISER

TREE / VEGETATIONOBSERVATION WELL

CULVERTRELIEF WELL

GUY WIRES / ANCHORSPIEZOMETER

GRAVEL SYSTEM RISER

LEFT ABUTMENT COLLECTOR

MINOR CONTOUR

SYSTEM DRAIN / OUTFALL

MAJOR CONTOURLEFT ABUTMENT COLLECTOR

LEGEND

MANHOLE/

RISER ID

NORTHING EASTING

TOP OF

MANHOLE/

RISER

TOP OF

BASE SLAB

RISER

MANHOLE

INLET

MANHOLE

OUTLET

RELIEF WELL

OUTFALL AT

MANHOLE

MH‐1 629,856.89 2,199,497.36 1,388.00 1,373.50 NA NA 1,374.00 NA

MH‐2 629,580.68 2,199,388.09 1,383.00 1,371.75 NA 1,372.00 1,372.00 NA

MH‐3 629,589.27 2,199,491.64 1,380.00 1,370.00 NA 1,371.25 1,370.25 1371.25 (RW‐68AR) MH‐4 269,445.47 2,199,504.61 1,378.00 1,366.25 NA 1,367.50 1,366.50 1367.50 (RW‐68R)

1368.00 (RW‐67A)*

1365.00 (RW‐67R)

RISER 1 629,732.86 2,199,384.30 1,387.00 NA 1,375.00 NA NA NA

RISER 3 629,431.52 2,199,408.93 1,379.80 NA 1,376.00 NA NA NA

* OUTFALL MAY REQUIRE FIELD FITTING TO MANHOLE

TABLE 1 ‐ MANHOLE LOCATIONS AND ELEVATIONS (FEET LPD)

MH‐5 629,255.23 2,199,644.71 1,372.00 1,364.75 1,365.001,366.00NA

INVERT

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

RISER 9

RISER 23

RISER 8

RISER 21 RISER 9

RISER 23

RISER 8

OHP

RW-65

RW-65A

RW-66B

RW-66C

RW-67A

RW-67B

H560Ra H560Rb

H560Rb-12

J320Ra

J320Rb

J474Ra

J474Rb

J662Ra

J662Rb

PZ 26

PZ 27

PZ 28

PZ 29

PZ 30

PZ-18

PZ-18R

PZ-18R-12

PZ-19

PZ-22

PZ-24

RW-66A

RW-66

ELI

ELL

S P

L W

A Y D

E A

C C

E S

S R

O A

ILL

ACCES

ROAD

SPILLWAY ACCESS ROAD

AND REMOVED

OW20-02 TO BE ABANDONED

SEE NOTE 7

AND OUTFALL,

REMOVE RW-68B

ABANDON AND

SEE NOTE 7

AND OUTFALL,

REMOVE RW-68A

ABANDON AND

SEE NOTE 7

AND RW-66A,

REMOVE RW-66

ABANDON AND

SEE NOTE 7

AND 8" CMP OUTFALL,

REMOVE RW-67

ABANDON AND

SEE NOTE 1

AND RW-66A OUTFALLS,

GROUT IN PLACE RW-66

PZ-25R

OW20-01

OHP

1400 1400

1415OHP

OHP

FLARED END

REMOVE AND REUSE

TO BE REMOVED

12" PERFORATED CMP

TO BE REMOVED

15" PERFORATED CMP

TO REMAIN

EXISTING 24" RCP

SEE NOTE 7

REMOVE RW-68,

ABANDONED AND

SEE NOTE 4.

REMOVED THIS CONTRACT,

15" PERFORATED CMP TO BE

POWER POLES

TO REMAIN

EXISTING 24" CMP

CULVERT "B"

TO REMAIN

HDPE OUTFALL

EXISTING RW-66B

BE REMOVED

RISER 4 TO

PROTECTED

MH-1 TO BE

REMOVED

MH-2 TO BE

TO REMAIN

EXISTING 24" CMP

CULVERT "A"

BE REMOVED

RISER 2 TO

SEE NOTE 3

TO BE REMOVED

8" PERFORATED CMP

BE REMOVED

RISER 3 TO

BE REMOVED

RISER 1 TO

RISER-1

C-300

G N

D E

M O

N P

L A

DEMOLITION PLAN

LEGEND SCALE: 1 INCH = 40 FEET

40' 0 40'

HERRING BONE RISER

HERRING BONE DRAIN

NON-WORK AREA

OHP OVERHEAD POWER LINES

MAJOR CONTOUR

MINOR CONTOUR

GUY WIRES / ANCHORS

CULVERT

TREE / VEGETATION

MANHOLE TO BE PROTECTED

TO BE REMOVED THIS CONTRACT

PERFORATED CMP / SOLID PIPE

REPLACED THIS CONTRACT

MANHOLE TO BE REMOVED AND

PIEZOMETER TO BE PROTECTED

RELIEF WELL TO BE PROTECTED

ABANDONED THIS CONTRACT

OBSERVATION WELL TO BE

OBSERVATION WELL TO BE PROTECTED

CONTRACT

REMOVED OR ABANDONED THIS

RELIEF WELL / RISER TO BE

NEW CASINGS AND THE NEW OUTFALLS ARE COMPLETED.

NOT BE ABANDONED UNTIL THE REPLACEMENT RELIEF WELLS,

EXISTING WELLS, 36-INCH CASINGS AND THEIR OUTFALLS MUST

7. WITH THE EXCEPTION OF EXISTING RELIEF WELL RW-68, ALL

PARAGRAPH 1.4.2.

AND IN SPECIFICATION 01 12 00 CONSTRUCTION GENERAL

BONE DRAINAGE AREA AS INDICATED ON THE DRAWINGS

6. NO DISTURBANCE WILL BE ALLOWED OVER THE HERRING

MATERIAL FOR DISPOSAL REQUIREMENTS.

SPECIFICATION 02 82 00, TITLED ASBESTOS-CONTAINING

ASBESTOS TREATED BITUMINOUS COATED PIPE. SEE

3, AND 4 ALONG WITH RELIEF WELL OUTFALLS HAVE

5. THE EXISTING 8", 12" AND 15" PERFORATED CMP, RISERS 1, 2,

BETWEEN RW-68 AND MH-2.

NOT FOLLOW THE EXISTING DRAIN ALIGNMENT SHOWN

MANHOLES MH-4 AND MH-5 (SHOWN ON SHEET C-201) DOES

4. THE NEW HORIZONTAL DRAIN ALIGNMENT BETWEEN NEW

AND HANDLING OF CONTAMINATED MATERIALS.

HANDLED ACCORDING TO SPECIFICATION 02 61 13 EXCAVATION

EXCAVATED CONTAMINATED SOIL AND WATER MUST BE

SPECIFICATION 02 32 13 SUBFURFACE DRILLING AND SAMPLING.

GEOTECHNICAL FIELD INVESTIGATION ACCORDING TO

AREA IS UNKOWN. CONTRACTOR MUST PERFORM A

LOCATIONS. NOTE THE FULL EXTENT OF THE CONTAMINATED

FOR MORE INFORMATION. SEE SHEET FIO-7 FOR BORING

GREATER THAN 10 MG/KG, SEE GEOTECHNICAL DATA REPORT

ENCOUNTERED TPH-DRO IN THE SOIL WITH CONCENTRATIONS

AND SOIL SAMPLE, AND BORING BH20-11 (NEAR RW-67),

(TPH)-DIESEL RANGE ORGANICS (DRO) IN BOTH GROUNDWATER

BH20-12 (NEAR RW-66A), TOTAL PETROLEUM HYDROCARBONS

9. CONTAMINATED SOILS WERE ENCOUNTERED IN BORING

DEWATERING REQUIREMENTS.

CONDITIONS. SEE SPECIFICATION 33 26 00 REGARDING

(MINIMUM OF 7) FOR MONITORING GROUND WATER

NTP HAS BEEN ISSUED AND PIEZOMETERS INSTALLED

8. WORK SHALL NOT PROCEED UNTIL DEWATERING

SPECIFICATION 31 23 00.00 20.

10. FOR TRENCH EXCAVATION LIMITATIONS AND SEQUENCING SEE

GRAVEL

APPROVED BY THE CONTRACTING OFFICER.

EXTENT REQUIRED TO REMOVE AND REPLACE THE DRAIN AS

THE LIMITS OF ASPHALT REMOVAL WILL BE LIMITED TO THE

AND BACKFILL FOR THE NEW TOE DRAIN OUTFALL IS COMPLETE.

ROAD CLOSURE AND REPAIR OF ASPHALT AFTER INSTALLATION

CONTRACTOR IS RESPONSIBLE FOR PROPER SIGNAGE FOR

REMOVAL OF THE ASPHALT SPILLWAY ACCESS ROAD. THE

EXISTING RISER 2 AND RISER 4 WILL REQUIRE PARTIAL

3. REPLACEMENT OF THE TOE DRAIN OUTFALL BETWEEN

REPLACED AT THE CONTRACTOR'S EXPENSE.

DAMAGES TO THESE FEATURES WILL BE REPAIRED OR

AND SUB DRAINS NOT PART OF THIS CONTRACT. ANY

CASING OUTFALLS, RELIEF WELLS, PIEZOMERS, RISERS

2. CONTRACTOR WILL PROTECT ALL MANHOLES, CASINGS,

OF POTENTIAL CONTAMINATED SOILS IN THIS AREA.

AND FILLED WITH FLOWABLE FILL TO MINIMIZE EXCAVATION

RW-66A WILL BE LEFT IN PLACE WITH THE OUTFALL CAPPED

1. THE CASING OUTFALL FOR RELIEF WELLS RW-66 AND

:NOTES

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

RISER 9

RISER 23

RISER 8

PZ-25R

MH-2

1410 1415

OHP

RISER 21 RISER 9

RISER 23

RISER 8

OHP

RW-65A

RW-66

RW-66A

RW-66B

RW-67A

RW-67B

RW-68B RW-68A

RW-66C

H560Ra H560Rb

H560Rb-12

J b

J320Ra

J320Rb

J474Ra

J474Rb

J a

PZ 27

PZ 28

PZ 29

PZ 30

PZ-18

PZ-18R

PZ-18R-12

PZ-19

PZ-21

PZ-22

PZ-24

C -3

RW-66R RW-66AR

RW-67R

OHP

RW-67

THIS CONTRACT

NEW RISER 3,

C-301

RW-68

RW-68R

RW-68AR RW-68BR

THIS CONTRACT

NEW RISER 1,

C-301

PIPE, THIS CONTRACT

NEW 12" SLOTTED HDPE

THIS CONTRACT

NEW MH-2,

OHP

PIPE, THIS CONTRACT

NEW 12" SLOTTED HDPE

C -3

OHP

OW20-01

OW20-02

OHP

MH-4

MH-5

MH-3

MH-1

OHP

9+7010+0010+5011+0011+5012+0012+5013+0013+20

ELEVATION 1372.00

12" SLOTTED HDPE PIPE

12" COARSE AGGREGATE

12" SLOTTED HDPE PIPE

EXISTING GRADE

SEEDING TO MATCH

6" TOPSOIL AND

ELEVATION 1376.00

FILTER SAND

ELEVATION 1375.00

E L E

V A

N F

E E

T L

P D

E L E

V A

N F

E E

T L

P D

SAND

FILTER

EXISTING GRADE

SEEDING TO MATCH

6" TOPSOIL AND

HDPE PIPE

12" SOLID

5' 5'

FILTER SAND

MANHOLE AND BASE SLAB

PRE-CAST CONCRETE

INVERT ELEVATION 1371.75

12" TOE DRAIN OUTFALLTO MH-3

STATION 13+03

SEE SHEET C-501

RISER 3 - 12" SOLID HDPE PIPE C

STATION 10+00

SEE SHEET C-501

RISER 1 - 12" SOLID HDPE PIPE

24" IMPERVIOUS BACKFILL

SAND

FILTER

12" FILTER SAND BEDDING

12" COARSE AGGREGATE BEDDING

24" IMPERVIOUS BACKFILL

12" COARSE AGGREGATE BEDDING

12" FILTER SAND BEDDING

STATION 11+54

RISER 3 OUTFALL

STATION 11+50

RISER 1 OUTFALL

12" COARSE AGGREGATE

SEE NOTE 2

TOP ELEVATION 1383.00

TOE DRAIN STATION 11+52

MH-2

0 10 20 30 40 50 60

1360 1360

SPILLWAY ACCESS ROAD

C L

FILTER SAND

EMBANKMENT S

LOPE

E L E

V A

N F

E E

L P

E L E

V A

N F

E E

L P

70 80 90

HDPE PIPE

12" SLOTTED

RANDOM FILL

EXISTING

COARSE AGGREGATE BEDDING

COARSE AGGREGATE

LLIFKCAB SUOIVREPMI "42

FILTER SAND BEDDING

SEE NOTE 2

TO MATCH EXISTING GRADE

6" TOPSOIL AND SEEDING

APPROXIMATE EMBANKMENT TOE

DRAIN, SEE NOTE 1

EXIST. EMB. CORE

C-301

RIPRAP STILLING BASIN PLAN VIEW SCALE: 1 INCH = 20 FEET

20' 0 20'

G N

C-301 C-301

SECTION

TOE DRAIN STATION 11+82

TOE DRAIN REPLACEMENT - PLAN

WELL COLLECTOR REPLACEMENT

TOE DRAIN OUTLET AND RELIEF

T O

E D

R A

E P

L A

C E

M E

N T

1 1

2 2

P L

A N P

R O

E A

N D S

E C

CULVERT EXTENSION

RELIEF WELL OUTFALLS

(SEE DEMOLITION PLAN)

ORIGINAL COLLECTOR ALIGNMENT

LEGEND

SCALE: 1 INCH = 40 FEET

40' 0 40'

HERRING BONE RISER

HERRING BONE DRAIN

NON-WORK AREA

OHP OVERHEAD POWER LINES

OBSERVATION WELL

MAJOR CONTOUR

MINOR CONTOUR

GUY WIRES / ANCHORS

CULVERT

SYSTEM RISER

LEFT ABUTMENT COLLECTOR

MANHOLE

TREE / VEGETATION

TOE DRAIN REPLACEMENT PIEZOMETER

EXISTING RELIEF WELL

INSTALLED BY USACE

REPLACEMENT RELIEF WELL

PROFILE

TOE DRAIN

SEE SHEET C-505 FOR EXCAVATION AND BACKFILLING DETAILS.

2. THE EXCAVATION AND SLOPES SHOWN ARE FOR VISUAL REFERENCE ONLY.

CORE DRAIN MATERIAL.

IS IN CONTINUOUS CONTACT AND MATCHES THE FULL THICKNESS OF THE

SHALL BE FIELD VERIFIED BY THE CONTRACTOR TO ENSURE FILTER SAND

1. ELEVATION AND THICKNESS OF EMBANKMENT CORE DRAIN VARIES AND

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

RISER 9

RISER 23

RISER 8

RISER 21 RISER 9

RISER 23

RISER 8

OHP

RW-65A

RW-66

RW-66A

RW-66B

RW-67A

RW-67B

RW-68B RW-68A

RW-66C

H560Ra H560Rb

H560Rb-12

J320Ra

J320Rb

J474Ra

J474Rb

PZ 27

PZ 28

PZ 29

PZ 30

PZ-18

PZ-18R

PZ-18R-12

PZ-21

PZ-22

PZ-24

PZ-25R

C-302

RW-66R RW-66AR

RW-67R

RW-68R

RW-68AR RW-68BR

OHP

C -3

15+04

THIS CONTRACT

NEW MH-3,

14+50

RW-67

14+00

RW-68

C -3

CONTRACT (SEE NOTE 3)

ASPHALT ROAD, THIS

REMOVE AND REPLACE

RISER-1

THIS CONTRACT

NEW MH-2,

OHP

PIPE, THIS CONTRACT

NEW 12" SLOTTED HDPE

OHP

OW20-01

OW20-02

OHP

MH-4

MH-5

MH-3

MH-1

MH-2

OHP

RISER-3

24" IMPERVIOUS BACKFILL

TOP OF SLAB ELEVATION 1380.00

TOE DRAIN OUTFALL STATION 15+06

MH-3

13+60 14+00 14+50 15+00 15+40

12" SLOTTED HDPE PIPE

ELEVATION 1372.00

ASPHALT ROAD SEE NOTE 3

FILTER SAND

INVERT ELEVATION 1371.25

E L E

V A

N F

E E

T L

P D

E L E

V A

N F

E E

T L

P D

REMOVE AND REPLACE

MANHOLE & BASE SLAB

PRE-CAST CONCRETE

MANHOLE & BASE SLAB

PRE-CAST CONCRETE

TOP ELEVATION 1383.00

TOE DRAIN OUTFALL STATION 13+98

MH-2EXISTING GROUND

COARSE AGGREGATE BEDDING

FILTER SAND BEDDING

FILL

RANDOM

EXIST.

6" AGGREGATE BASE COURSE

4" ASPHALT SURFACING

12" SOLID HDPE PIPE

COARSE AGGREGATE

SEE NOTE 2

ELEVATION 1370.25

COLLECTOR PIPE OUTLET

INVERT ELEVATION 1371.25

COLLECTOR PIPE OUTFALL

RW-68AR OUTFALL AND

SAND

FILTER

SAND

FILTER

TO MATCH EXISTING GRADE

6" TOPSOIL AND SEEDING

ELEVATION 1372.00

FROM RISER 1 AND RISER 3

2 x 12" TOE DRAIN OUTFALL

STATION 15+04

TOE DRAIN OUTFALL

SEE NOTE 1

CORE DRAIN,

EMBANKMENT

EXISTING

STATION 14+00

TOE DRAIN OUTLET

0204050 -20 -40 -50

4" ASPHALT ROADWAY

E L E

V A

N F

E E

L P

E L E

V A

N F

E E

L P

12" SLOTTED HDPE PIPE

FILTER SANDBASE COURSE

MINIMUM 6" AGGREGATE

COARSE AGGREGATE

COARSE AGGREGATE BEDDING

SEE NOTE 2

SEE NOTE 3

REMOVE AND REPLACE EXISTING ASPHALT

SEE NOTE 2

FILTER SAND BEDDING

24" IMPERVIOUS BACKFILL

C-302

G N

C-302 C-302

3 3 C-302 C-302

4 4

PROFILE

TOE DRAIN OUTFALL

P L

A N P

R O

E A

N D S

E C

N S

TOE DRAIN OUTFALL REPLACEMENT - PLAN

T O

E D

R A

U T F

A L L R

E P

L A

C E

M E

N T

(SEE DEMOLITION PLAN)

ORIGINAL COLLECTOR ALIGNMENT

LEGEND SCALE: 1 INCH = 40 FEET

40' 0 40'

HERRING BONE RISER

HERRING BONE DRAIN

NON-WORK AREA

GUY WIRES / ANCHORS

CULVERT

SYSTEM RISER

LEFT ABUTMENT COLLECTOR

PIEZOMETER

EXISTING RELIEF WELL

INSTALLED BY USACE

REPLACEMENT RELIEF WELL

MANHOLE

TREE / VEGETATION

CULVERT EXTENSION

RELIEF WELL OUTFALLS

TOE DRAIN OUTFALL REPLACEMENT

COLLECTOR REPLACEMENT

TOE DRAIN AND RELIEF WELL

SECTION

TOE DRAIN OUTFALL STATION 14+56

AND REPLACE THE DRAIN AS APPROVED BY THE CONTRACTING OFFICER.

ASPHALT REMOVAL WILL BE LIMITED TO THE EXTENT REQUIRED TO REMOVE

BACKFILL FOR THE NEW TOE DRAIN OUTFALL IS COMPLETE. THE LIMITS OF

FOR ROAD CLOSURE AND REPAIR OF ASPHALT AFTER INSTALLATION AND

ACCESS ROAD. THE CONTRACTOR IS RESPONSIBLE FOR PROPER SIGNAGE

AND RISER 4 WILL REQUIRE PARTIAL REMOVAL OF THE ASPHALT SPILLWAY

3. REPLACEMENT OF THE TOE DRAIN OUTFALL BETWEEN EXISTING RISER 2

SEE SHEET C-505 FOR EXCAVATION AND BACKFILLING DETAILS.

2. THE EXCAVATION AND SLOPES SHOWN ARE FOR VISUAL REFERENCE ONLY.

CORE DRAIN MATERIAL.

IS IN CONTINUOUS CONTACT AND MATCHES THE FULL THICKNESS OF THE

SHALL BE FIELD VERIFIED BY THE CONTRACTOR TO ENSURE FILTER SAND

1. ELEVATION AND THICKNESS OF EMBANKMENT CORE DRAIN VARIES AND

NOTES:

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

RISER 9

RISER 23

RISER 8

C -3

7 C -3

OHP

RISER 21 RISER 9

RISER 23

RISER 8

OHP

J474Ra

J474Rb

PZ 30

PZ-22

7 C -3

8 C -3

C -3

PZ-25R

RW-68B RW-68A

RW-67A

RW-66C RW-66C

RW-66B RW-66B

H560Rb

H560Ra

H560Rb-12

PZ 27

PZ-24

PZ 29

PZ-18R-12

PZ-18R

PZ-18

RW-65A

RW-66

PZ 28

RW-66A

J320Ra J320Rb

PZ-21

PIPE, THIS CONTRACT

NEW 12" SLOTTED HDPE

SEE NOTE 1

RELIEF WELL (RW-67R)

USACE-INSTALLED REPLACEMENT

SEE NOTE 1

RELIEF WELL (RW-66AR)

USACE-INSTALLED REPLACEMENT

SEE NOTE 1

RELIEF WELL (RW-66R)

USACE-INSTALLED REPLACEMENT

THIS CONTRACT

RW CASING OUTFALL,

NEW 8" SLOTTED HDPE

SHEET C-505

(STATIONS 3+20 TO 3+30),

EXCAVATION DETAIL

SEE POWER POLE TRENCH

SHEET C-505

(STATIONS 3+20 TO 3+30),

EXCAVATION DETAIL

SEE POWER POLE TRENCH

OHP

MH-5, THIS CONTRACT

RW-67A OUTFALL TO NEW

CONNECT EXISTING

PIPE, THIS CONTRACT

NEW 12" SLOTTED HDPE

C -3

THIS CONTRACT (SEE DETAIL, SHEET C-504)

TO NEW RELIEF WELL COLLECTOR,

CONNECT EXISTING RW-66B OUTFALL

STA. 7+20, THIS CONTRACT

SOLID 18" HDPE PIPE AT

TRANSITION SLOTTED TO

THIS CONTRACT

(RW-66R AND RW-66A),

RELIEF WELL CASING OUTFALLS

NEW 8" SOLID HDPE

THIS CONTRACT

HDPE PIPE,

NEW 15" SLOTTED

THIS CONTRACT

NEW MH-4,

THIS CONTRACT

NEW MH-5,

C-303

TO BE PROTECTED

EXISTING MH-1THIS CONTRACT

NEW MH-3,

RW-67B

RW-67

RW-68

RISER-1

OHP

6 C -3

C -3

OW20-01

OW20-02

OHP

MH-2

CONTRACT

TO BE INSTALLED, THIS

WELL CASING OUTFALL

NEW 8" SOLID HDPE RELIEF

OHP

CONTRACT

TO BE INSTALLED, THIS

WELL CASING OUTFALL

NEW 8" SOLID HDPE RELIEF

OHP

RISER-3

SEE NOTE 1

RELIEF WELL (RW-68AR)

USACE-INSTALLED REPLACEMENT

SEE NOTE 1

WELL (RW-68R)

REPLACEMENT RELIEF

USACE-INSTALLED

SEE NOTE 1

RELIEF WELL (RW-68RB)

USACE-INSTALLED REPLACEMENT

CONTRACT

TO BE INSTALLED, THIS

WELL CASING OUTFALL

NEW 8" SOLID HDPE RELIEF

0 10 20 30 40 50 60 70-10-20-30

1370 1370

SPILLWAY ACCESS ROAD

C L

1400 1400

EXISTING GROUND

12" SLOTTED HDPE PIPE

E L E

V A

N F

E E

L P

E L E

V A

N F

E E

L P

FILTER SAND

SEE NOTE 2

LLIFKCAB SUOIVREPMI "42

FILTER SAND BEDDING

COARSE AGGREGATE BEDDING

COARSE AGGREGATE

SEE NOTE 2

TO MATCH EXISTING GRADE

6" TOPSOIL AND SEEDING

MIN 12"1370

0 10 20 30 40 50 60 70 80 90 100-10-20-30-40-50

1360 1360

SPILLWAY ACCESS ROAD

C L

EXISTING GROUND

E L E

V A

N F

E E

L P

E L E

V A

N F

E E

L P

NEW 15" SLOTTED HDPE PIPE ALIGNMENT

COARSE AGGREGATE

COARSE AGGREGATE BEDDING FILTER SAND BEDDING

SEE NOTE 2

6" TOPSOIL AND SEEDING

SEE NOTE 2

FILTER SAND

REMOVE EXISTING CMP COLLECTOR PIPE (SEE NOTE 3)

CL REALIGNED DITCH NIARD OT EPOLS

24" IMPERVIOUS FILL/BACKFILL

C-303

G N

C-303 C-303

STATION 5+20

RELIEF WELL COLLECTOR

C-303 C-303

5 5

STATION 1+00

RELIEF WELL COLLECTOR 6

S H

E E

T O

RELIEF WELL COLLECTOR PIPE REPLACEMENT - PLAN

N E

W O

U T F

A L L S P

L A

N P

R O

E S

E C

N S

R W C

O L L E

C T

O R P

E R

E P

L A

C E

M E

N T

(SEE DEMOLITION PLAN)

ORIGINAL COLLECTOR ALIGNMENT

LEGEND SCALE: 1 INCH = 40 FEET

40' 0 40'

HERRING BONE RISER

HERRING BONE DRAIN

NON-WORK AREA

GUY WIRES / ANCHORS

CULVERT

SYSTEM RISER

LEFT ABUTMENT COLLECTOR

PIEZOMETER

EXISTING RELIEF WELL

INSTALLED BY USACE

REPLACEMENT RELIEF WELL

MANHOLE

TREE / VEGETATION

CULVERT EXTENSION

RELIEF WELL OUTFALLS

OUTFALL REPLACEMENT

TOE DRAIN AND TOE DRAIN

REPLACEMENT

RELIEF WELL CASING OUTFALL

RELIEF WELL COLLECTOR PIPE AND

ALIGNMENT AS SHOWN ON THE PLAN.

MH-5 DOES NOT FOLLOW THE EXISTING DRAIN

3. THE HORIZONTAL ALIGNMENT BETWEEN MANHOLES MH-4 AND

BACKFILLING DETAILS.

REFERENCE ONLY. SEE SHEET C-505 FOR EXCAVATION AND

2. THE EXCAVATION AND SLOPES SHOWN ARE FOR VISUAL

RELIEF WELLS WILL BE INSTALLED THIS CONTRACT.

CONTRACTOR. CASING OUTFALLS FOR THE REPLACEMENT

SHOWN ON DRAWINGS AND WILL BE PROVIDED TO THE

APPROXIMATE. FINAL LOCATIONS MAY VARY FROM WHAT IS

INSTALLED BY USACE PRIOR TO CONTRACT AWARD ARE

1. LOCATION OF REPLACEMENT RELIEF WELLS TO BE

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

-0+10 0+00 1+00 2+00 3+00

12" COLLECTOR OUTLET

3+90

12" SLOTTED HDPE PIPE

RW-68BR OUTFALL

8" SOLID HDPE

GROUND

EXISTING

INVERT ELEVATION 1371.25

12" COLLECTOR OUTFALL

INVERT ELEVATION 1370.25

HDPE PIPE

12" SOLID

FILTER SAND

E L E

V A

N F

E E

T L

P D

0+20 0+40 0+60 0+80 1+20 1+40 1+60 1+80 2+20 2+40 2+60 2+80 3+20 3+40 3+60 3+80

OUTLET ELEVATION 1374.00

STATION 0+00

STATION 2+67

STATION 2+71

APPROXIMATE STATION 1+62

ELEVATION 1373.00

APPROXIMATE INVERT

CONCRETE BASE SLAB

EXISTING CMP MANHOLE WITH

MANHOLE AND BASE SLAB

PRE-CAST CONCRETE

24" IMPERVIOUS BACKFILL

TOP ELEVATION 1388.00

STATION -0+02

EXISTING MH-1

FILTER SAND BEDDING

COARSE AGGREGATE BEDDING

COARSE AGGREGATE

FILTER SAND BEDDING

COARSE AGGREGATE BEDDING

COARSE AGGREGATE

TOP ELEVATION 1380.00

COLLECTOR PIPE STATION 2+70

MH-3

LLIFKCAB SUOIVREPMI "42

12" SOLID HDPE PIPE

INVERT ELEVATION 1371.25

12" TOE DRAIN OUTFALL FROM MH-2

8" OUTFALL FROM RW-68AR

TO MATCH EXISTING GRADE

6" TOPSOIL AND SEEDING

TO MATCH EXISTING GRADE

6" TOPSOIL AND SEEDING

EXISTING GROUND

BEDDING

AGGREGATE

COARSE

NOTE 3

SEE

4+00 5+00 6+00 7+00

STATION

STATION 7+77

ELEVATION 1367.50

15" COLLECTOR OUTLET

ELEVATION 1366.50

18" COLLECTOR OUTLET

ELEVATION 1366.00

ELEVATION 1365.00

24" CMP EXTENSION LOCATION

7+803+90

18" SLOTTED HDPE PIPE

15" SLOTTED HDPE PIPE

8" SOLID HDPE

RW-66B OUTFALL

INVERT ELEVATION 1365.00

E: 2199768.048 N: 629127.757

ELEVATION 1364.70

FILTER SAND

18" SOLID HDPE PIPE

INVERT ELEVATION 1365.00

RW-67R OUTFALL

FILTER SAND

SAND

FILTER

HDPE PIPE

12" SOLID

4+20 4+40 4+60 4+80 5+20 5+40 5+60 5+80 6+20 6+40 6+60 6+80 7+20 7+40 7+60

STATION 4+16

STATION 4+12

STATION 6+46

STATION 6+50

INVERT ELEVATION 1368.00

RW-67A OUTFALL

12" IMPERVIOUS FILL

LLIFKCAB SUOIVREPMI "42

TOP ELEVATION 1378.00

STATION 4+14

MH-4

5' 5'

COARSE AGGREGATE

COARSE AGGREGATE BEDDING

FILTER SAND BEDDING

STATION 4+94

SEE SHEET C-305

DRAINAGE DITCH MODIFICATIONS

MANHOLE AND BASE SLAB

PRE-CAST CONCRETE

SEE NOTE 2

STATION 7+20

COARSE AGGREGATE

24" TO 12" FROM STATIONS 6+89 TO 7+39

TRANSITION IMPERVIOUS BACKFILL FROM

TO MATCH EXISTING GRADE

6" TOPSOIL AND SEEDING

24" IMPERVIOUS BACKFILL

INVERT ELEVATION 1367.50

RW-68R OUTFALL

15" SOLID HDPE PIPE

TO MATCH EXISTING GRADE

6" TOPSOIL AND SEEDING

BEDDING

AGGREGATE

COARSE

12" COLLECTOR OUTFALL

MANHOLE AND BASE SLAB

PRE-CAST CONCRETE

15" COLLECTOR OUTFALL

FILTER SAND BEDDING

COARSE AGGREGATE BEDDING

TOP ELEVATION 1372.00

COLLECTOR PIPE STATION 6+49

MH-5

TO SOLID HDPE PIPE

TRANSITION SLOTTED

BOTTOM, SEE NOTE 1

EXISTING 6" GRAVEL CHANNEL

8+00 9+00 9+90

STATION 9+51.65

ELEVATION 1364.00

7+80

RW-66AR OUTFALL

8" SOLID HDPE

18" SOLID HDPE PIPE

8" SOLID HDPE

RW-66R OUTFALL

INVERT ELEVATION 1365.00

E L E

V A

N F

E E

T L

P D

ELEVATION 1367.00

TOP OF RIPRAP

SPALLS

FILTER SAND

12" IMPERVIOUS FILL

8+20 8+40 8+60 8+80 9+20 9+40 9+60 9+80

APPROXIMATE STATION 8+29

ELEVATION 1364.85

APPROXIMATE INVERT

APPROXIMATE STATION 8+69

ELEVATION 1364.65

APPROXIMAT INVERT SEE NOTE 1

CHANNEL BOTTOM

EXISTING 6" GRAVEL

TO MATCH TOP OF CHANNEL

6" TOPSOIL AND SEEDING

COARSE AGGREGATE

18" OUTFALL WITH FLAPGATE

SEE SHEET C-306

RIPRAP APRON

FILTER SAND BEDDING

16+0016+5017+00

STATION

STATION 15+98.50

ELEVATION 1365.45

8" SLOTTED HDPE PIPE

GROUND

EXISTING

STATION 16+00

MANHOLE AND BASE SLAB

PRE-CAST CONCRETE

COARSE AGGREGATE BEDDING

FILTER SAND BEDDING

RW-67R CASING

24" IMPERVIOUS BACKFILL

8" SOLID HDPE PIPE

TOP ELEVATION 1372.00

RW-67R OUTFALL STATION 16+73

MH-5

TO MATCH EXISTING GRADE

6" TOPSOIL AND SEEDING

15+80

EL. 1365.00

STA. 16+71

FILTER SAND

ELEVATION 1368.00

RW-67A OUTFALL

ELEVATION 1365.00

18" COLLECTOR PIPE

ELEVATION 1366.00

15" COLLECTOR PIPE

COARSE AGGREGATE FILTER SAND

NOTE 3

SEE

NOTE 3

SEE

18" SOLID HDPE PIPE

FILTER SAND BEDDING

RW-66B OUTFALL EXTENSION

FILTER SAND

0 10 20 30-10-20-30-40

24" RCP

EXISTING

12" IMPERVIOUS FILL

GROUND

EXISTING

E L E

V A

N F

E E

L P

E L E

V A

N F

E E

L P

D SEEDING

6" TOPSOIL AND

C-304

G N

M A

T C

H L

E T

H E

E T

E L E

V A

N F

E E

T L

P D

M A

T C

H L

E T

H E

E T

E L E

V A

N F

E E

T L

P D

M A

T C

H L

E T

H E

E T

E L E

V A

N F

E E

T L

P D

M A

T C

H L

E T

H E

E T

E L E

V A

N F

E E

T L

P D

C-303

RELIEF WELL COLLECTOR PROFILE

C-303C-303

RW-67R OUTFALL PROFILE

C-304 C-303STATION 7+70

RELIEF WELL COLLECTOR

S H

E E

T O

C-303 C-304 C-304

C-304 C-304

C-303 C-304

C-303

RELIEF WELL COLLECTOR PROFILE

C-303 C-304 C-304

C-303

RELIEF WELL COLLECTOR PROFILE

C-303 C-304 C-304

R W C

O L L E

C T

O R P

E R

E P

L A

C E

M E

N T

W O

U T F

A L L S P

L A

N P

R O

E S S

E C

N S

9 9

7 7

8 8

BACKFILLING DETAILS.

REFERENCE ONLY. SEE SHEET C-505 FOR EXCAVATION AND

3. THE EXCAVATION AND SLOPES SHOWN ARE FOR VISUAL

STATIONS 7+20 TO 7+21.

THE SLOTTED PIPE TO SOLID HDPE TRANSITION BETWEEN

HDPE ON THIS DETAIL MUST EXTEND LATERALLY 1 F00T PAST

2. COARSE AGGREGATE BACKFILL SURROUNDING THE SLOTTED

INFORMATION.

GEOSYNTHETIC MAT. SEE SHEET FIO-12 FOR ADDITIONAL

RELIEF WELL CHANNEL BENEATH THE GRAVEL-FILLED

PREVIOUS CONTRACT IN BOTTOM AND WEST SLOPE OF

1. CONTRACTOR MAY ENCOUNTER STABILIZATION RIPRAP FROM

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

19+80 20+00 20+60 21+00 21+30

STATION

ELEVATION 1376.05

NEW 24" CMP CULVERT EXTENSION

EXISTING 24" CMP CULVERT

E: 2199518.828 N: 629371.422

ELEVATION 1373.08

EXISTING GROUND

E L E

V A

N F

E E

L P

E L E

V A

N F

E E

20+20 20+40 20+80 21+20

THIS CONTRACT

FLARED END

INSTALL NEW

STATION 20+70

NEW 24" CMP EXTENSION

24" CMP, START OF

END OF EXISTING

STATION 21+08

CMP EXTENSION

END OF 24"

E: 2199556.241 N: 629380.213

ELEVATION 1372.00

FILTER SAND BEDDING COARSE AGGREGATE BEDDING

COARSE AGGREGATE

SLOPE TO DRAIN

1V ON 3H

FILTER SAND

ELEVATION 1365.6

15" RELIEF WELL COLLECTOR PIPE

6" TOPSOIL AND SEED

IMPERVIOUS BACKFILLFILTER SAND BEDDING

STATION 20+00

24" CMP

BEGINNING OF EXISTING

(SEE NOTE 1)

EXTENSION

PLACED AROUND

IMPERVIOUS FILL

RW-66

72 1372

O H

16+

PZ-24

RW-67A

PZ 30

THIS CONTRACT

FLARED END

INSTALL NEW

RW-67B

D R

S L O P E T

MH-4

RW-68R

MH-5

E: 2199518.828 N: 629371.422

STATION 20+70

24" CMP EXTENSION

START OF NEW

APPROXIMATE GRADING LIMITS

0EXSITING 24" CMP CULVERT

CULVERT "A"

EXSITING 24" RCP

OW20-02

OW20-01

O H

N E

L O

T T

E D H

D P

E P

C-30

O H

C-305

SCALE: 1 INCH = 20 FEET

20' 20'

B B

G N

C-305

CULVERT "A"

C M

P E

X T

E N

C U

L V

E R

24" CMP EXTENSION (CULVERT "A") - PLAN

24" CMP EXTENSION - PROFILE

P L

A N

G R

A D

A N

D P

R O

LEGEND

NON-WORK AREA

OHP OVERHEAD POWER LINES

PIEZOMETER

RELIEF WELL

MANHOLE

FINAL GRADE CONTOUR

EXISTING CONTOUR

CULVERT

CULVERT EXTENSION

INSTALLED BY USACE

REPLACEMENT RELIEF WELL

OBSERVATION WELL

AND OUTFALLS

RELIEF WELL COLLECTOR

MUST NOT BE LESS THAN 12 INCHES.

1. MINIMUM COVER OVER CMP CULVERT

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

EXISTING FILTER SAND

EXISTING GRAVEL

12"

20'

VARIES

12"

VARIES

CLASS A RIPRAP

SD DOT

18"

8" 18"

FILTER SAND BEDDING

NEW SPALLS

12"

REPOSE

ANGLE OF

NOT TO SCALE

AND 24" RCP EXTENSION

RIPRAP APRON DETAIL B FOR 18" RELIEF WELL COLLECTOR

NEW 24" RCP EXTENSION (OFFSET)

COARSE AGGREGATE

INSTALL FLAP GATE

(SEE NOTE 2)

CHANNEL BOTTOM

CHOKE RIPRAP WITH FILTER SAND

IMPERVIOUS FILL

TOPSOIL & SEEDING

FILTER SAND

24" RCP EXTENSION

18" SOLID HDPE OUTFALL

1364.00 (SEE NOTE 5)

INVERT ELEVATION

COLLECTOR OUTFALL

16+80 17+00 17+50 18+00 18+50 19+00 19+50 20+00 20+20

STATION

STATION 17+00

ELEVATION 1369.10

ELEVATION 1366.00

NEW 24" RCP EXTENSION

ELEVATION 1364.00EXISTING 24" RCP

SLOPE TO DRAIN

E L E

V A

N F

E E

V A

N F

E E

24" CMP

INLET OF EXISTING

EXISTING GROUND

ELEVATION 1367.00

TOP OF RIPRAP

STATION 19+83.41

END OF RCP EXTENSION

12" MIN. IMPERVIOUS FILL

EXISTING GRADE

SEEDING TO MATCH

6" TOPSOIL AND

1V:10H

FILTER SAND BEDDING

FILTER SAND

.(SEE DETAILS THIS SHEET)

RIPRAP APRON

PLACEMENT

START OF FILL

STATION 18+32

BEGIN NEW EXTENSION

STATION 18+54

END OF EXISTING RCP

OHP

RW-66C

PZ-30

OUTFALL

NEW RW-66A

TRANSITION

1V:10H SLOPE

RW-66B

PZ-21

PZ-28

H560Rb-12

H560Rb

H560Ra

PZ-27

C -3

PZ-18

PZ-18R

PZ-18R-12

CHANNEL SLOPES.

EXISTING GRAVEL ON

NEW RIPRAP INTO

BLEND / TRANSITION

PZ-26

C -3

PZ 29

OHP

RW-66AR

RW-66R

MH-5

16+

RW-66A

RW-66

RW-65A

RISER 21

OUTFALL

NEW RW-66AR 9+52

WELL COLLECTOR

HDPE RELIEF

NEW 18" SOLID

C-306

16+

WELL CASING OUTFALL

NEW 8" SLOTTED RELIEF

SLOPE TO DRAIN

19+83

9+00

8+00

7+00

19+00

WELL COLLECTOR

CONNECT TO 18" RELIEF

NEW RW-66B OUTFALL TO

ELEV. 1366.00

E: 2199768.048

N: 629127.757

24" RCP EXTENSION

START OF NEW

18+00

EXISTING 24" CMP

CULVERT "B"

EXISTING 24" RCP

CHANNEL FILL LIMITS

APPROXIMATE

17+00

C-306

EXISTING 24" RCP

BEGINNING OF

OHP

RW-67R

12"

18"

6" EXISTING GRAVEL

6" EXISTING FILTER SAND

32' - 7 1/2"

CULVERT B EXISTING 24" CMP

NOT TO SCALE

RIPRAP APRON DETAIL C - EXISTING 24" CMP (CULVERT B)

EXISTING OUTFALL INVERT ELEVATION 1364.00

RIPRAP

CLASS A

SD DOT

CHANNEL SLOPE

EXISTING RELIEF WELL

REUSE EXISTING FLARED END

18" SOLID HDPE PIPE

24" RCP PIPE

SEE NOTE 1

0 10 20 30-10-20-30-40

40 50 60 70 80 90 100 110 120

E L E

V A

N F

E E

L P

FILTER SAND

6" TOPSOIL AND SEEDING

12" IMPERVIOUS FILL

E L E

V A

N F

E E

L P

C-306

R A

P A

P R

O N D

E T

C-306

020' 20'

SCALE: 1 INCH = 20 FEET

B B

G N

C-306 C-306

PROFILE - 24-INCH RCP EXTENSION

SECTION - 24-INCH RCP EXTENSION AND RW COLLECTOR

LEGEND

NON-WORK AREA

OHP OVERHEAD POWER LINES

PIEZOMETER

RELIEF WELL

MANHOLE

FINAL GRADE CONTOUR

EXISTING CONTOUR

CULVERT

CULVERT EXTENSION

INSTALLED BY USACE

REPLACEMENT RELIEF WELL

-I

N C

H R

C P E

X T

E N

OBSERVATION WELL

POWER POLE

HERRING BONE RISER

HERRING BONE DRAIN

P L

A N S

E C

A N

PLAN - 24-INCH RCP EXTENSION

TO THE EXTENT REQUIRED FOR OUTFALL INSTALLATION.

PRIOR TO EXCAVATION. REMOVAL EXTENTS OF GEOSNYTHETIC MAT MUST BE LIMITED

GEOSYNTHETIC MAT ON THE SLOPE OF THE RELIEF WELL CHANNEL MUST BE REMOVED

3. FOR 24-INCH RCP EXTENSION AND RELIEF WELL COLLECTOR PIPE, THE EXISTING

GEOSYNTHETIC MAT. SEE SHEET FIO-12 FOR ADDITIONAL INFORMATION.

IN BOTTOM AND WEST SLOPE OF RELIEF WELL CHANNEL BENEATH THE GRAVEL-FILLED

2. CONTRACTOR MAY ENCOUNTER STABILIZATION RIPRAP FROM PREVIOUS CONTRACT

PLUNGE POOL AREA. OUTFALLS WILL BE A MINIMUM OF 3.5 FEET APART AT END.

1. DISTANCE BETWEEN RCP EXTENSION AND NEW COLLECTOR VARIES UNTIL REACHING

NOTES:

AND OUTFALLS

RELIEF WELL COLLECTOR

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

NO SCALE

CASING AND RISER

BETWEEN PROTECTIVE

INSTALL PEA GRAVEL

GROUND SURFACE

APPROXIMATE EXISTING

OF SOLID 12" PIPE

MINIMUM 4" ABOVE TOP

COVER FOR ACCESS

LOCKABLE HINGED

HDPE PIPE

NEW 12" SLOTTED

GROUND SURFACE

INSTALL 3' BELOW

24" CMP CASING

DETAIL E - NEW RISER 1 AND RISER 3 SUBDRAIN

RANDOM FILL

EXISTING

(SEE NOTE 10 & SHEET C-301)

EXISTING CORE DRAIN

(SEE NOTE 11)

ANGLE OF REPOSE

EMBANKMENT SLOPE

APPROXIMATE EXISTING

COARSE AGGREGATE BEDDING

FILTER SAND BEDDING

RISER

PIPE

HDPE

SOLID

NEW 12"

12" DIA. HDPE 45 DEGREE ELBOW JOINT

COARSE AGGREGATE

FILTER SAND

24"

PERVIO

US B

ACKFIL

24" IMPERVIOUS BACKFILL

81.8706°

88.7393°

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

DIRECTION

FLOW

MANHOLE NO 5

TO OUTLET CHANNEL

NEW 18" PIPE

FROM RW-67R

NEW 8" PIPE

FROM RW-67A

NEW 8" PIPE

FROM MANHOLE 4

NEW 15" PIPE

41.9138°44 .75

NEW MANHOLE NO 4

TO MANHOLE 5

NEW 15" PIPE

FROM RW-68R

NEW 8" PIPE

FROM MANHOLE 3

NEW 12" PIPE

84.8487°

53.7116°

TO MANHOLE 4

NEW 12" PIPE

FROM MANHOLE 2

NEW 12" PIPE

FROM MANHOLE 1

NEW 12" PIPE

84.8594° 88 .7

5°

94.8403°

MANHOLE 3

NEW 12" PIPE TO

NEW MANHOLE NO 3

NEW MANHOLE 2

EXISTING MANHOLE 1

TO MANHOLE 3

NEW 12" PIPE

5°

FROM RISER 3

NEW 12" PIPE

FROM RISER 1

NEW 12" PIPE

SEE MANHOLE NOTES.

E: 2,199,504.61

N: 629,445.47

E: 2,199,644.71

N: 629,255.23

E: 2,199,491.64

N: 629,589.27

E: 2,199,497.36

N: 629,856.89

E: 2,199,388.09

N: 629,580.68

FROM RW-68AR

NEW 8" PIPE

2' - 6"

MIN.

2' - 6"

TYPICAL

1/4"

A A

HALF PLAN

MANHOLE COVER AND FRAME

NO SCALE

4' - 0"

M A

C .C

APPROX. WT. - 58 LBS

NO SCALE

M A

PLAN

16"

AND FRAME

MANHOLE COVER SIDE RAIL LADDER

GALVANIZED STEEL

SECTION A: TYPICAL PRECAST MANHOLE

M A

RISER

CONCRETE

PRECAST

ELEVATION

RIM OR TOP

EACH WAY TOP

#4 BARS @ 11" O.C.

RAIL LADDER

STEEL SIDE

GALVANIZED

" DIA. RUNGS4

MCF-30-LD

FLAT TOP

PRECAST CONCRETE

SIDE RAILS

" X2

V A

VARIES

OUTLET

COLLECTOR

WAY BOTTOM

O.C. EACH

#4 BARS @ 6"

C-501 C-501

OF MANHOLE

WITH INNER DIAM.

OUTLET PIPE FLUSH

6" INTO MANHOLE

INLET PIPE EXTENDS

F L

O W

FLOW

SECTION B-B

BASE (SEE NOTE 4)

PRE-CAST CONCRETE

BASE

CONCRETE

PRE-CAST

2' 2'

HDPE INLET (SEE NOTE 8)

FLOW FROM SOLID

2" CLEAR

WAY TOP FACE

#4 @ 12" EACH

30"

34.65"

35"

3.78"

OPTIONAL FL760/SK12 SKIRT

BEDDING

FILTER SAND

NO SCALE

EXISTING GROUND SURFACE

CASING AND RISER

BETWEEN PROTECTIVE

INSTALL PEA GRAVEL

OF SOLID 12" PIPE

MINIMUM 4" ABOVE TOP

COVER FOR ACCESS

LOCKABLE HINGED

MIN. 1' STICKUP

ELBOW JOINT

2 X 45 DEGREE

12" DIA. HDPE

GROUND SURFACE

INSTALL 3' BELOW

24" CMP CASING

HDPE PIPE RISER

NEW 12" SOLID

MH-2

FLOW TO

DETAIL D - NEW RISER 1 AND RISER 3

COARSE AGGREGATE BEDDING

FILTER SAND BEDDING

24" IMPERVIOUS BACKFILL

FILTER SAND FILTER SAND

NEW 12" SLOTTED HDPE PIPE

(SEE NOTE 11)

ANGLE OF REPOSE

COARSE AGGREGATE

10 FT BELOW GW

BOTTOM OF SCREEN

BOTTOM CAP

BOTTOM OF SCREEN

~ 1 FOOT BELOW

1 FOOT ABOVE SCREEN

FILTER TOP

NO SCALE

NEW PIEZOMETER DETAIL

BOREHOLE

MINIMUM 8"

SCREEN AND CASING

SCHEDULE 80

2-INCH

FREEZE THAW AND FROST HEAVE

INSTALL CASING TO AVOID

MINIMUM 3' STICKUP

WITH LOCKING CAP

4-INCH SQUARE STEEL CASING

3/8" MEDIUM SIZE

CHIPS/PELLETS

BENTONITE

AT INSTALLATION

GROUND WATER

TOP OF SCREEN AT

(20 - 40 SILICA SAND)

FILTER PACK

WRAP SCREEN

10 SLOT CONTINUOUS

10' LONG

C-501

G N

Z O

M E

T E

R D

E T

N E

W M

A N

H O

L E

E R A

N D

11. THE EXCAVATION AND SLOPES SHOWN ARE FOR VISUAL REFERENCE ONLY. SEE SHEET C-505 FOR EXCAVATION AND BACKFILLING DETAILS.

10. FOR EMBANKMENT CORE DRAIN CONNECTION REQUIREMENTS, REFER TO SPECIFICATION 31 23 00.00 20, EXCAVATION AND BACKFILLING FOR LEFT ABUTMENT COLLECTOR PIPE SYSTEM.

9. MANHOLE MH-1 HAS ASBESTOS BITUMINOUS COATING ON THE INSIDE OF THE RISER, SEE SPECIFICATIONS SECTION 02 82 00 ASBESTOS CONTAINING MATERIALS FOR ADDITIONAL REQUIREMENTS.

CONNECTION MUST NOT EXCEED 5 FEET.

8. THE SEGMENT OF PIPES CONNECTING TO AND/OR PROTRUDING INTO MANHOLES MUST BE MADE WITH SOLID HDPE PIPE TO ALLOW GROUTING AND/OR FLOW MEASUREMENTS. THE MAXIMUM LENGTH OF THE SOLID HDPE

7. A MINIMUM LAYER OF 6" COMPACTED FILTER SAND BEDDING MUST BE PLACED BENEATH THE PRE-CAST CONCRETE MANHOLE.

DEPTH GREATER THAN 20 FEET. DEPTH OF MANHOLES MUST BE MEASURED FROM THE TOP OF THE FRAME TO THE INVERT OF THE SUBDRAIN.

6. PERMANENTLY INSTALLED GALVANIZED SIDE RAIL LADDERS MUST BE INSTALLED IN ALL MANHOLES. IN ADDITION TO STEEL LADDERS, A LADDER CLIMBING SAFETY DEVICE MUST BE INSTALLED IN ALL MANHOLES WITH A

5. MANHOLE COVERS AND FRAMES ARE FIBRELITE FL760.

4. MANHOLE BASE SLABS ARE 6-FOOT DIAMETER BY 8-INCH THICK PRE-CAST CONCRETE BASES.

3. THICKNESS AND REINFORCING FOR PRECAST CONCRETE MANHOLE WALLS AND REINFORCING FOR PRECAST CONCRETE FLAT TOPS ARE SHOWN ON SECTION A, TYPICAL PRE-CAST MANHOLE DETAIL.

2. MANHOLES HAVE PRECAST CONCRETE FLAT TOPS.

1. PRECAST MANHOLES INCLUDING FRAMES, COVERS, RISERS, TOPS, AND LADDERS WILL BE FURNISHED AND INSTALLED BY CONTRACTOR.

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

14"1"

14"

NO SCALE

EXISTING RELIEF WELL RW-68 DETAILS

EL. 1367.97

GROUND SURFACE

APPROXIMATE

GRAVEL PACK

EXISTING

RISER

RELIEF WELL RW-68

PIPE RISER

8" I.D. PLASTIC

EXISTING

36" CASING (RW-68)

12" PERFORATED CMP15" PERFORATED CMP

TO MANHOLE MH-2

15" PERFORATED CMP

CMP FROM RISER 4

12" PERFORATED

EL. 1368.60

EL. 1367.94

EL. 1366.96

NO SCALE

EXISTING RELIEF WELL RW-66 AND RW-67 DETAILS

12"

THE GROUND SURFACE

FILL WITHIN 12 INCHES OF

12 INCHES OF FLOWABLE

RISER

RIM

RISER

INVERT OF

PACK

EXISTING GRAVEL

TO RELIEF WELL CHANNEL

8" DIA. CMP OUTFALL

GROUND SURFACE

APPROX. EXISTING

36" DIA. CMP CASING

CONCRETE BASE SLAB

REINFORCED

SEE TABLE 2

INVERT ELEVATION,

RISER PIPE

EXISTING 8" PLASTIC

14" 14"

NO SCALE

TOP OF MANHOLE

GROUND SURFACE

APPROX. EXISTING

EL. 1368.85

PIPE FROM RW-67A

8" SOLID HDPE

FROM RW-67

8" SOLID PIPE

FROM RW-67A

8" SOLID PIPE

BASE SLAB

REINFORCED CONCRETE

EL. 1366.06

EL. 1366.20

EL. 1365.70

FROM RW-67 EL. 1366.1

8" PERFORATED CMP PIPE

15" DIA. CMP

MANHOLE

36" DIA. CMP

CMP

15" DIA.

15" CMP

EXISTING MANHOLE MH-2 DETAILS

PRE-PACKED SCREEN

EXISTING 5" I.D.

UNKNOWN

DETAILS

CONNECTION

C.M.P.

12" DIA.

SEAL

EXISTING BENTONITE

UNKNOWN

REINFORCEMENT @ 12"

BASE SLAB WITH #4

REINFORCED CONCRETE

SQUARE 4'x4'x6"

V A

SEE FIO-6 FOR COVER DETAIL

GROUND ELEV.

APPROXIMATE

LIFTING HANDLE

HDPE CASING

36" DIA. CORRUGATED

SEE TABLE 2

INVERT ELEVATION VARIES

HDPE OUTFALL PIPE

8" CORRUGATED

VALVE ASSEMBLY

RELIEF WELL

STEEL RISER PIPE

SCHEDULE 40 STAINLESS

EXISTING 5" I.D. (5 1/2" O.D.)

STEEL CLAMP TO CASING

ROPE WITH STAINLESS

STAINLESS STEEL WIRE

NO SCALE

GROUND ELEV.

APPROXIMATE

LIFTING HANDLE

HDPE CASING

36" DIA. CORRUGATED

HDPE OUTFALL PIPE

8" CORRUGATED

VALVE ASSEMBLY

RELIEF WELL

SLAB WITH #4@12"

BASE SLAB REINFORCED

SQUARE 4'x4'x6" CONCRETE

SEAL

EXISTING BENTONITE

STEEL RISER PIPE

SCHEDULE 40 STAINLESS

EXISTING 5" I.D. (5 1/2" O.D.)

PRE-PACKED SCREEN

EXISTING 5" I.D.

C-502

STEEL CLAMP TO CASING

WITH STAINLESS

WIRE ROPE

STAINLESS STEEL

EXISTING RELIEF WELL RW-68A, RW-68B DETAILS EXISTING RELIEF WELL RW-66A DETAILS

NO SCALE

G R

E L

F W

D M

A N

H O

L E D

E T

V A

SEE FIO-6 FOR COVER DETAIL

B B

G N

THE GROUND SURFACE

FILL WITHIN 12 INCHES OF

12 INCHES OF FLOWABLE

VARIES SEE TABLE 2

INVERT ELEVATION

A T

N N

E N

A M

D W

N B

C K

D B

D E

N E

D B

D E

S C

2 3

4 5

M A

R K

A P

P R

NUMBER

IDENTIFICATION

SHEET

OF ENGINEERS

US ARMY CORPS

D A

T E

E N

U M

B E

S U

B M

T E

D B

P L

O T S

C A

L E

P L

O T D

A T

D A

T E

C O

R P

S O

F E

N G

E E

R S

U S

A R

M Y E

N G

E E

R D

T R

M A

R K

D E

S C

N A

P P

D A

T E

C O

N T

R A

C T N

C x x x x

O M

A H

N E

B R

A S

K A

OMAHA DISTRICT

F O

R T T

H O

M P

S O

N S

O U

T H D

A K

O T

E N

D D

A M L

A K

E S

H A

R P

C O

L L E

C T

O R P

E S

Y S

T E

R E

P L

A C

E M

E N

T O

F L

E F

T A

B U

T M

E N

K P

C L

B J L

R J

B J L

V E

M B

E R

PIPE

INNNER RELIEF WELL

REMOVE CASING AND

20'

IMPERVIOUS MATERIAL

SURFACE AND FILL WITH

2' REMOVE BELOW GROUND

GROUT

CEMENT BENTONITE

RELIEF WELL

GROUT TO TOP OF

TREMIE HIGH DENSITY

AND SEED

6" TOP SOIL

GROUND SURFACE

APPROX. EXISTING

PACK

EXISTING GRAVEL

TO BE REMOVED

AND RELIEF WELL OUTFALLS

SUBDRAIN, COLLECTOR

STUB WITH CAP

SEE NOTE 7

EXISTING RISER PIPE

SURFACE

PLACED 3' BELOW GROUND

HIGH DENSITY GROUT TO BE

IDENTIFICATION

LOCATION AND

STEEL MARKER PLATE FOR

6" DIAMETER, 1/4" THICK

SEE NOTE 7

RISER PIPE

EXISTING

BELOW GROUND SURFACE (SEE NOTE 2)

CUTOFF AND REMOVE 36" C.M.P 3 FEET

GROUND SURFACE

TO WITHIN 6" OF

IMPERVIOUS BACKFILL

WITH REINFORCEMENT

CONCRETE BASE SLAB

NO SCALE

ABANDONMENT DETAILS FOR RW-67, RW-68A, AND RW-68B

AND SEED

6" TOPSOIL

RELIEF WELL.

PLACED 1.5' ABOVE TOP OF

HIGH DENSITY GROUT TO BE

CHANNEL

NEAR RELIEF WELL

NEW CAP AT OUTFALL

GROUND SURFACE

TO WITHIN 6" OF

BACKFILL IMPERVIOUS FILL

GROUND SURFACE

APPROX. EXISTING

IDENTIFICATION

LOCATION AND

STEEL MARKER PLATE FOR

6" DIAMETER, 1/4" THICK

NO SCALE

RELIEF WELL RW-66, AND RW-66A ABANDONMENT DETAILS

WELL

TO TOP OF RELIEF

DENSITY GROUT

TREMIE HIGH

SEE NOTE 7

EXISTING RISER PIPE

FILL (SEE NOTE 4).

AND FILLED WITH FLOWABLE

WELL CHANNEL TO BE CAPPED

8" DIA. CMP OUTFALL TO RELIEF

BELOW GROUND SURFACE (SEE NOTE 2)

CUTOFF AND REMOVE 36" C.M.P 1 FOOT

EXISTING GRAVEL PACK

TOP OF CASING

8" PIPE FROM RW-67

REMOVE PERFORATED

CONNECTED

INCLUDING ALL PIPES

IN ITS ENTIRETY

REMOVE MANHOLE

GROUND SURFACE

APPROX. EXISTING

FROM RW-67A

8" SOLID PIPE

REMOVE

REMOVE BASE SLAB

36" DIA. CMP CASING

GROUND SURFACE

APPROX. EXISTING

PACK

EXISTING GRAVEL

NO SCALE

ABANDONMENT DETAILS FOR RW-68

BASE SLAB

GROUT TO TOP OF

TREMIE HIGH DENSITY

TO BE REMOVED

RELIEF WELL OUTFALL

AND SEED

6" TOPSOIL

(SEE NOTE 2)

36" CMP AT BASE SLAB

CUTOFF AND REMOVE

(SEE NOTE 7)

TO TOP BASE SLAB

PIPE TO BE REMOVED

EXISTING RISER

C-503

MANHOLE 2 REMOVAL DETAILS

NO SCALE

E X

G R

E L

F W

E L L A

M A

N H

O L E A

B A

N D

O N

M E

N T

D E

T A

B B

G N

ADDITIONAL ABANDONMENT DETAILS

SEE SPECIFICATIONS FOR

ABANDONMENT DETAILS FOR OW20-02

INSTALLED FOR RW-66A, RW-68A, RW-68B,

7. 8" PLASTIC RISER PIPES WERE INSTALLED FOR RW-66, RW-67, RW-68. 5" STAINLESS STEEL RISERS WERE

RISERS AND MAY REQUIRE REMOVAL TO ABANDON WELL.

6. DURING INITIAL INSTALLATION OF RW-66 AND RW-66A FLOWABLE FILL WAS PLACED AROUND CORRUGATED

5. EXCAVATION DETAILS NOT SHOWN.

IN THE SPECIFICATIONS.

4. FLOWABLE FILL REQUIREMENTS FOR THE ABANDONMENT OF RELIEF WELLS RW-66 AND RW-66A CAN BE FOUND

3. SEE SPECIFICATIONS FOR RELIEF WELL ABANDONMENT REQUIREMENTS.

SPECIFICATION SECTION 02 82 00 TITLE "ASBESTOS CONTAINING MATERIALS" FOR REQUIREMENTS.

ABANDONMENT OF THE WELLS AND DISCONNECTION OF OUTFALL PIPES FROM THE COLLECTOR PIPE SYSTEM. SEE

OUTFALL PIPES, THE 8'' TOE DRAIN RISERS (1,2,3,4) AND MANHOLE 2. CARE SHOULD BE TAKE DURING

WELLS RW-66, RW-67, AND RW-68, THE INTERIOR OF PERFORATED CMP COLLECTOR PIPES, THE INTERIOR OF 8"

2. ASBESTOS TREATED BITUMINOUS COATING IS LOCATED ON THE INTERIOR OF THE 36" CMP CASING OF RELIEF

ACCORDANCE WITH THE SPECIFICATIONS.

1. CONTRACTOR MUST SUBMIT FOR APPROVAL A SHORING AND SHEETING PLAN AND A DEWATERING PLAN IN

File details come from the government source that posted it. Updated Dec 1, 2022.