SABIN_100_DESIGN_PLANS_READY_TO_ADVERTISE_03.13.2018.pdf

SILVER PINES RD

HAMMOND RD W

BIRMLEY RD

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K

E Y

S T

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C A

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D R

A C

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A S

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I L

V E

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L A

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SECOR RD

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E

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K

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R

R

D

NORTH LONG LAKE RD

W SOUTH AIRPORT RD

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S

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BARNEY RD

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K

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E FRONT ST

F

A

N I E

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D

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A R

F I E

BALDWIN ST

BOUGHEY ST

N

R

F

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E

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CARVER ST

W SOUTH

AIRPORT RD

N

R

U S

C H

HARTMAN RD

W

L

V

B

A

R

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V

CENTRE ST

C

E

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A

R

R

SILVER

LAKE

BOARDMAN

LAKE

BOARDMAN

IMPOUNDMENT

SABIN

POND

B

O

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R

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M

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L O

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G A

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BROAD

RD

DIPLEY RD

G A

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I E

P

BLAIR TWP.

GARFIELD TWP.

EAST GRAND

TRAVERSE BAY

WEST GRAND

TRAVERSE BAY

TRAVERSE CITY

W I L

L I A

M

PROJECT

AREA

STATE LOCATION MAP

GRAND TRAVERSE

COUNTY

RESTORATION PLANS

R-0.1 SITE PLAN

R-0.2 SEQUENCING & SEDIMENT MANAGEMENT

R-1.1 CHANNEL GRADING & PROFILE 1 OF 2

R-1.2 CHANNEL GRADING & PROFILE 2 OF 2

R1.3 TRIBUTARY GRADING PLAN

R-2.1 CONSTRUCTION CROSS SECTIONS 1 OF 2

R-2.2 CONSTRUCTION CROSS SECTIONS 2 OF 2

R-3.1 LARGE WOOD & GRADING DETAILS

R-3.2 SEDIMENT CONTROL DETAILS

R-3.3 TYPICAL SECTIONS & FES LIFT DETAILS

R-4.1 PLANTING PLAN 1 OF 2

R-4.2 PLANTING PLAN 2 OF 2

Sheet Number Sheet Title

TITLE & GENERAL PLANS

T-1.1 TITLE & INDEX

T-1.2 GENERAL NOTES

T-2.1 GENERAL PLAN OF SITE

T-3.0 SOIL BORING LOCATION MAP

T-3.1 REAL ESTATE PLAN

STRUCTURAL DEMOLITION

S-0.1 STRUCTURAL REMOVAL SITE OVERVIEW

S-1.1 SPILLWAY & TAINTER GATE REMOVAL

S-2.1 DOWNSTREAM RETAINING WALL REMOVAL

S-3.1 TURBINE FLOOR REMOVAL

S-4.1 POWERHOUSE REMOVAL (1 OF 3)

S-4.2 POWERHOUSE REMOVAL (2 OF 3)

S-4.3 POWERHOUSE REMOVAL (3 OF 3)

BREACHING PLANS

B-0.1 EXISTING SITE TOPOGRAPHY

B-1.1 GENERAL SITE PLAN

B1.2 SOIL EROSION AND SEDIMENTATION CONTROL PLAN

B-1.3 SOIL EROSION DETAILS

B-2.1 DAM BREACHING PLAN VIEW - STAGE 1 & STAGE 2

B-2.2 DAM PROFILE VIEWS

B-3.1 DAM BREACHING PLAN VIEW - STAGE 3

B-4.1 DAM BREACHING PLAN VIEW - STAGE 4 & STAGE 5

B-4.2 DAM BREACHING PROFILE VIEW - STAGE 4 & STAGE 5

B-5.1 DAM BREACHING PLAN VIEW - STAGE 6

B-6.1 DAM BREACHING - RESTORATION

B-6.2 DAM BREACHING - RESTORATION DETAILS

DAN DEVAUN, PE

PROJECT MANAGER

CIVIL & HYDRAULICS

SHEETS T-1.1 - T-2.1, T-3.1, B-0.1 -

B-6.1, S-0.1 - S-4.3

MIKE BURKE, PE

RIVER RESTORATION

SHEETS R-0.1 - R-4.2

VIKRAM GAUTAM, PE

GEOTECHNICAL

SHEETS T-3.0, B-1.1 - B-6.1

TI

TL

E

IN

DE

X

T-1.1

EXISTING

RAILROAD

PHILLIP C. ROSS P.E., CHIEF ENGINEERING & CONSTRUCTION OFFICE

MARIE T. STRUM P.E., CHIEF ENGINEERING & TECHNICAL SERVICES

THIS PROJECT WAS DESIGNED BY AECOM, TRAVERSE CITY, MI. IT HAS

BEEN REVIEWED BY THE DETROIT DISTRICT, U.S. ARMY CORPS OF

ENGINEERS TO ENSURE COMPLIANCE WITH ER 1110-1-12 ENGINEERING

AND DESIGN QUALITY MANAGEMENT. THE INITIALS OR SIGNATURES AND

REGISTRATION DESIGNATIONS OF INDIVIDUALS APPEAR ON THESE

PROJECT DOCUMENTS WITHIN THE SCOPE OF THEIR EMPLOYMENT AS

REQUIRED BY ER 1110-1-8152.

NICHOLAS J. ZAGER P.E., CHIEF GEOTECH & STRUCTURES BRANCH

WILLIAM D. MERTE P.E., CHIEF COST & GENERAL ENGINEERING BRANCH

/s/ TIM SMITH for

/s/ PHIL ROSS

/s/ WILLIAM MERTE

/s/ TINA KOWITZ for

CIVIL ABBREVIATIONS

EX./EXIST.

WM

C.P.

Y.D.

STM

SN

C & G

F.F.E.

I.E./INV.

T.P.

CB

MH

LB

EXISTING

WATER MAIN

CONTROL POINT WITH NUMBER

STORM YARD DRAIN

STORM SYSTEM

SANITARY SYSTEM

CURB & GUTTER

FINISH FLOOR ELEVATION

INVERT ELEVATION

TOP OF PIPE

STORM CATCH BASIN

STORM LEACH BASIN

PR./PROP. PROPOSED

DIA. DIAMETER

PVMT. PAVEMENT

TYP. TYPICAL

FRP FIBER REINFORCED PIPE

LF LINER FOOT

C.Y. CUBIC YARDS

S.Y. SQUARE YARDS

GAL. GALLON

CL CENTER LINE

MECH. MECHANICAL

RCP REINFORCED CONCRETE PIPE

INV INVERT

ELEV./EL. ELEVATION

N NORTHING

E EASTING

BTM. BOTTOM

C.O. CLEAN OUT

S.B. SOIL BORING

FT. FOOT

PP POWER POLE

ELEC. ELECTRICAL

PVC POLYVINYL CHLORIDE

W/L WATER LINE

HYD. HYDRANT

CONC. CONCRETE

P.O.B POINT OF BEGINNING

S.S. STAINLESS STEEL

1. THE CONTRACTOR SHALL HAVE SOLE AND COMPLETE

RESPONSIBILITY FOR JOB SITE CONDITIONS DURING THE COURSE OF

CONSTRUCTION OF THIS PROJECT, INCLUDING SAFETY OF ALL

PERSONS AND PROPERTY.

2. THE CONTRACTOR SHALL DESIGN, CONSTRUCT, AND MAINTAIN ALL

SAFETY DEVICES, INCLUDING SHORING, AND SHALL BE SOLELY

RESPONSIBLE FOR CONFORMING TO ALL LOCAL, STATE, AND

FEDERAL HEALTH AND SAFETY STANDARDS, LAWS, AND

REGULATIONS TO INCLUDE USACE EM 385-1-1.

3. THE CONTRACTOR IS REQUIRED TO TAKE DUE PRECAUTIONARY

MEASURES TO PROTECT AND MAINTAIN ANY EXISTING UTILITY

SERVICES SHOWN ON THESE PLANS AND ANY OTHERS NOT OF

RECORD OR NOT SHOWN ON THESE PLANS. THE UTILITIES SHOWN

ON THE PLANS ARE APPROXIMATE LOCATIONS AND SHOULD BE

INTERPRETED AS SUCH. THE CONTRACTOR IS REQUIRED TO

PROVIDE A MARK-OUT OF ALL UTILITIES WITHIN THE AREA OF

WORK PRIOR TO COMMENCING CONSTRUCTION. CONTRACTOR TO

CALL MISS DIG (1-800-482-7171) TO OBTAIN A MARK-OUT OF

PUBLIC UNDERGROUND UTILITIES. THE CONTRACTOR SHALL

CONTACT THE PRIVATE UTILITIES LISTED ON THIS SHEET TO

ARRANGE FOR MARK-OUT OF PRIVATE UTILITIES NOT LOCATED BY

THE MISS DIG SYSTEM. CONTRACTOR SHALL BE AWARE OF

HIGH-VOLTAGE OVERHEAD ELECTRIC LINES. THE CONTRACTOR IS

RESPONSIBLE FOR ALL DAMAGE TO EXISTING UTILITIES AND ALL

COSTS TO REPAIR DAMAGE TO ANY UTILITY (SEWERS, WATER, GAS,

ELECTRICAL, CABLE, UNDERDRAIN SYSTEMS, & SPRINKLER SYSTEMS,

ETC.) KNOWN, OR OTHERWISE, SHALL BE BORNE SOLELY BY THE

CONTRACTOR. ACCEPTANCE & APPROVAL OF SAID REPAIRS SHALL

BE PER THE OWNER OF THE DAMAGED UTILITY.

4. THE CONTRACTOR SHALL TAKE PRECAUTIONARY MEASURES TO

ENSURE ALL UTILITY SERVICES WILL REMAIN FUNCTIONAL DURING

THE CONSTRUCTION PERIOD.

5. THE CONTRACTOR SHALL HAVE A FULL SIZE SET OF THE MOST

RECENTLY APPROVED FINAL PLANS MARKED “FOR CONSTRUCTION”

ON THE JOB SITE AT ALL TIMES.

6. UPON COMPLETION OF EACH DAY'S WORK, THE CONTRACTOR

SHALL BE RESPONSIBLE FOR LEAVING THE WORK AREA SECURED

AND FREE OF HAZARDS AND SHALL PROVIDE ALL NECESSARY

TEMPORARY SIGNS, WARNING DEVICES, AND BARRICADES.

7. THE CONTRACTOR SHALL KEEP ACCURATE AND LEGIBLE RECORDS

OF ALL CHANGES OF WORK THAT OCCUR DURING CONSTRUCTION

AND INFORMATION ON “AS-BUILT” CONDITIONS.

DOCUMENTATION OF CHANGES AND AS-BUILT INFORMATION

SHALL BE RECORDED ON AN APPROVED SET OF FULL SIZE FINAL

PROJECT PLANS AND DELIVERED TO THE COR WITHIN 90 DAYS

AFTER COMPLETION OF WORK.

8. THE CONTRACTOR SHALL TAKE THE NECESSARY STEPS TO PROTECT

THE PROJECT AND ADJACENT PROPERTY, STRUCTURES, UTILITIES

AND LANDSCAPING FROM ANY DAMAGE, EROSION AND SILTATION

THAT RESULTS FROM THE CONSTRUCTION BY APPROPRIATE MEANS

(SAND BAGS, HAY BALES, SILT FENCE, DIKES, ETC.) UNTIL SUCH TIME

THE PROJECT IS COMPLETED AND ACCEPTED BY THE GOVERNMENT.

GENERAL NOTES

1. PROTECTION OF WORK

DURING THE EXECUTION OF THE WORK SHOWN ON THESE PLANS, THE CONTRACTOR

SHALL BE RESPONSIBLE FOR PROTECTION OF THE WORK AREA AND EQUIPMENT

FROM FLOODS AND DAMAGE OR DELAYS DUE TO FLOODS. NO EQUIPMENT SHALL BE

LEFT IN CHANNEL AFTER WORK HOURS.

2. BREACHING SAFETY

IN THE CASE OF AN UNEXPECTED BREACH THROUGH THE DAM THE CONTRACTOR

SHALL HAVE A STOCKPILE OF DEMOLISHED CONCRETE MATERIALS NEARBY FOR

EMERGENCY PLACEMENT. THIS MATERIAL WILL COME FROM THE DEMOLITION OF

THE SPILLWAY. ALSO THE CONTRACTOR IS REQUIRED TO HAVE EXTRA SAND BAGS

AVAILABLE. CONTRACTOR SHALL PREPARE SITE SPECIFIC HEALTH & SAFETY PLAN,

INCLUDING AN EMERGENCY ACTION PLAN. THIS EMERGENCY ACTION PLAN SHALL BE

REVIEWED AND COORDINATED WITH THE GRAND TRAVERSE COUNTY EMERGENCY

MANAGER, GREGG BIRD (231-995-6059).

3. REMOVAL OF THIRD PARTY OWNED EQUIPMENT

CONTRACTOR IS REQUIRED TO COORDINATE THE REMOVAL OF THIRD PARTY OWNED

EQUIPMENT PER SECTION 02 41 16.

SPECIAL NOTES

SPW TEMPORARY SHEET PILE WALL

Know what's

R

MANHOLE (ANY UTILITY)

NAME OF OWNER TYPE OF UTILITY

CONSUMERS ENERGY ELECTRICAL

ATTENTION: CURTIS HANSEN

821 HASTING STREET

TRAVERSE CITY, MI 49684

CURTIS.HANSEN@CMSENERGY.COM

231-929-6265

CONSUMERS ENERGY ELECTRICAL TRANSMISSION

ATTENTION: KEN KING

1945 W. PARMALL ROAD

JACKSON, MI 49201

COMLINK TELECOM

ATTENTION: MIKE OHANNESIAN

1781 HOLLOWAY DR.

HOLT, MI 48842

AMOHANNESIAN@COMLINK.COM

517-742-4116

ATT TELECOM

ATTENTION: KATHY DOHM-BEISER

TEAM LEADER

142 E. STATE STREET, FLOOR 2 WEST

TRAVERSE CITY, MI 49684

KD1484@ATT.COM

231-941-2707

THE PURPOSE OF THE WORK SHOWN ON THESE PLANS IS THE DEWATERING OF THE

SABIN IMPOUNDMENT, EXCAVATION AND RELOCATION OR DISPOSAL OF SOILS AND

MATERIALS WITHIN THE LIMITS OF EXCAVATION, REMOVAL OF THE EXISTING

POWERHOUSE, SPILLWAY, AND APPURTENANCES, AND RESTORATION OF THE

BOARDMAN RIVER. THE WORK GENERALLY INCLUDES, BUT IS NOT LIMITED TO,

CONCRETE REMOVAL, REMOVAL AND DISPOSAL OF FILL/SEDIMENT MATERIALS,

CONSTRUCTION OF THE RIVER CHANNEL THROUGH THE POWERHOUSE,

CONSTRUCTION OF INSTREAM HABITAT IN THE RESTORED RIVER, AND RESTORATION

OF THE RIVER BANK AND FLOODPLAIN AREAS. THIS WORK WILL BE CONDUCTED

WHILE CONTRACTOR ACTIVELY MANAGES WATER LEVELS IN SABIN POND AND FLOW

OVER SABIN DAM WITHIN THE CONSTRAINTS SPECIFIED IN THESE PLANS.

THE MDEQ HYDROLOGIC STUDIES UNIT PROVIDED THE FOLLOWING HYDROLOGY

INFORMATION FOR THE BOARDMAN RIVER AT THE LOCATION OF SABIN DAM:

TOTAL DRAINAGE AREA OF 268.4 SQUARE MILES AND CONTRIBUTING DRAINAGE

AREA OF 206 SQUARE MILES

ENGINEER'S STATEMENT

CONTRACTOR SHALL COORDINATE AND ARRANGE FOR A PRECONSTRUCTION

MEETING AT THE SITE PRIOR TO THE START OF CONSTRUCTION TO BE

ATTENDED BY THE GRAND TRAVERSE COUNTY, CONTRACTOR, AND COR. PRIOR

TO THE TIME OF THE PRECONSTRUCTION MEETING, THE CONTRACTOR SHALL

HAVE THE LIMITS OF THE WORK (GRADING AND TEMPORARY ACCESS ROAD)

STAKED AND THE LOCATIONS OF EXISTING UTILITIES MARKED OUT. THE

PURPOSE OF THIS IS TO CONFIRM THE PROPOSED WORK WILL NOT CONFLICT

WITH THE ADJACENT SITES. IF A CONFLICT IS IDENTIFIED AT THAT TIME, THE

CONTRACTOR SHALL REQUEST DIRECTION FROM THE GOVERNMENT PER THE

CONTRACT.

PRECONSTRUCTION MEETING

AFTER BIDS HAVE BEEN SUBMITTED AND A SELECTION IS MADE, ELECTRONIC FILES

WILL BE PROVIDED TO THE CONTRACTOR FOR LOCATING KEY DESIGN ITEMS.

ELECTRONIC FILES

MORE DETAILS ABOUT THE OPERATION, HISTORY AND CONDITION OF THE DAM

ARE AVAILABLE IN THE FOLLOWING DOCUMENTS, WHICH ARE ON FILE AND

AVAILABLE FOR REVIEW BY APPOINTMENT WITH WILLIAM MERTE USACE -

DETROIT DISTRICT (313) 226-2433:

1. SABIN DAM DESIGN PLANS DATED 1930 PREPARED BY HARZA ENGINEERING

COMPANY FOR THE CITY OF TRAVERSE CITY.

2. BOARDMAN RIVER FEASIBILITY STUDY DATED JANUARY 2009 PREPARED BY

ENVIRONMENTAL CONSULTING AND TECHNOLOGY, INC.

3. PROBABLE MAXIMUM FLOOD STUDY, BOARDMAN AND SABIN

HYDROELECTRIC DAMS, FERC PROJECT. DATED SEPTEMBER 1995. PREPARED

BY MEAD AND HUNT, INC.

4. SPILLWAY DESIGN FLOOD STUDIES, BROWN BRIDGE, BOARDMAN, AND SABIN

PROJECTS DATED JULY 17, 1991 PREPARED BY MEAD AND HUNT, INC.

5. UNITED STATES ARMY CORP OF ENGINEERS (USACE) FEASIBILITY STUDY,

PHASE I REPORT DATED AUGUST 2013. PREPARED BY THE USACE.

GE

NE

RA

L N

OT

ES

T-1.2

WSE WATER SURFACE ELEVATION

FES FABRIC ENCAPSULATED SOIL

COR CONTRACTING OFFICER'S REPRESENTATIVE

1. INSTALL TEMPORARY SOIL EROSION MEASURES PRIOR TO EARTH

MOVING ACTIVITIES (SHEET B-1.2).

2. CONSTRUCT/REINFORCE CONSTRUCTION ACCESS ROADS TO THE EAST

AND WEST SIDE OF THE DAM, ACCESS ROAD FROM THE SOUTH BY THE

BEAVER POND PARKING AREA, AS WELL AS STAGING AREA(S) FOR

EQUIPMENT PARKING AND WASHING (SHEET B-1.1).

3. DEMOLISH SPILLWAY CONCRETE STRUCTURE AND APPURTENANCES (CAT

WALK, RAILINGS, ETC) TO WSE AT THE TIME OF CONSTRUCTION (~609'),

LEAVING SPILLWAY WALL AT ELEVATION 615' (SHEET B-2.1).

4. EXCAVATE SEDIMENT OUT FROM IN FRONT OF THE SPILLWAY INLET TO

FACILITATE RIVER FLOW. INSTALL A SEDIMENT TRAP UPSTREAM OF THE

SPILLWAY (SHEET B-2.1).

5. EXCAVATE BEHIND EXISTING SPILLWAY WALLS TO ELEVATION 614.5'

(SHEET B-2.1).

6. CONTINUE DEMOLITION OF SPILLWAY OGEE CREST AND CONCRETE

APRON AT 1 FOOT INCREMENTS (NO FASTER THAN 1FT PER DAY) TO

DRAWDOWN THE IMPOUNDMENT. EACH 1 FOOT INCREMENT MUST

REMOVE THE ENTIRE WIDTH OF THE OGEE CREST, SUCH THAT THE

ENTIRE OPENING IS AT THE SAME ELEVATION AT THE CLOSE OF THE

INCREMENT. INCREMENTALLY REMOVE BACKFILL FROM SPILLWAY

WALLS, SUCH THAT BACKFILL GRADE IS 6 FEET ABOVE CURRENT

SPILLWAY BREACH LEVEL (NO HIGHER, NO LOWER) (SHEET B-2.1).

7. CONSTRUCT DOWNSTREAM RIVER ACCESS TO THE WEST OF THE

POWERHOUSE (SHEET B-2.1).

8. AS THE WATER SURFACE WITHIN THE POND IS DRAWN DOWN AND

SEDIMENT IS EXPOSED, RIVER CHANNEL AND FLOODPLAIN WORK CAN

BEGIN WITHIN THE UPPER IMPOUNDMENT. ALSO, A PORTION OF THE

RIVER CHANNEL CONSTRUCTED TO CONVEY FLOW INTO THE SABIN

IMPOUNDMENT UNDER THE BOARDMAN DAM REMOVAL PROJECT WILL

BE FILLED AND REROUTED BASED ON THE SABIN DAM REMOVAL AND

RIVER RESTORATION PLANS (SHEET R-1.1).

9. ONCE THE POND IS DRAWN DOWN BELOW THE POWERHOUSE INTAKE

SILL, INSTALL STOP LOGS IN THE POWERHOUSE INTAKES TO ISOLATE

FLOW TO THE SPILLWAY (SHEET B-3.1).

10. INSTALL EARTHEN FLOW DIVERSION BERM DOWNSTREAM BETWEEN

THE POWERHOUSE AND SPILLWAY OUTLET TO ISOLATE DOWNSTREAM

RIVER FLOW TO THE EAST SIDE OF THE RIVER CHANNEL (SHEET B-3.1).

11. BEGIN CONSTRUCTION OF RESTORED RIVER CHANNEL DOWNSTREAM OF

THE POWERHOUSE (SHEET R-1.2).

12. AS THE WATER LEVEL WITHIN THE POND DECREASES, CONTINUE

EXCAVATION OF SEDIMENT IN THE PROPOSED RESTORED RIVER

CHANNEL THROUGH THE IMPOUNDMENT PLACING SPOILS IN THE

CLOSEST DESIGNATED AREAS AS APPROPRIATE (SHEET R-1.1).

13. UPON REACHING ELEVATION 598.5 AT THE SPILLWAY, STOP DEMOLITION

AT THE SPILLWAY. INSTALL BULK BAG COFFERDAM UPSTREAM OF THE

POWERHOUSE (SHEET B-4.1).

14. DEMOLISH POWERHOUSE TO 6 FEET BELOW THE PROPOSED RIVER

CHANNEL (APPROXIMATE DESIGN RIVER CHANNEL ELEVATION OF 595'

THROUGH THE POWERHOUSE) (SHEET B-4.1 AND S-4.1 - 4.3).

15. CONSTRUCT RESTORED RIVER CHANNEL THROUGH FORMER

POWERHOUSE LOCATION (SHEET B-4.1 AND R-1.2).

16. ONCE THE RESTORED RIVER CHANNEL HAS BEEN FULLY CONSTRUCTED

THROUGH THE POWERHOUSE LOCATION BEGIN FINAL DRAWDOWN BY

INCREMENTALLY LOWERING THE BULK BAG COFFERDAM UPSTREAM OF

THE POWERHOUSE (SHEET B-4.1).

17. COMPLETE RESTORED RIVER CHANNEL THROUGH THE BULK BAG

COFFERDAM AND MATCH DOWNSTREAM RESTORED CHANNEL TO

UPSTREAM RESTORED CHANNEL (SHEET R-1.2).

18. ONCE FLOW IS FULLY DIVERTED TO THE RESTORED RIVER CHANNEL,

DEMOLISH ANY REMAINING SPILLWAY STRUCTURE 2 FEET BELOW FINAL

GRADE AND FILL TO MATCH THE DESIGN PLANS (SHEET S-1.1, B-5.1, AND

R-1.2).

19. FINISH WORK BY COMPLETING FINAL GRADING AND SEEDING (SHEETS R-

4.1 AND R-4.2).

9. THE CONTRACTOR SHALL REFER TO SPECIFICATION SECTION 01 11 00 SUMMARY

OF WORK FOR ALL PERMIT REQUIREMENTS AND GUIDANCE IN OBTAINING THE

APPLICABLE PERMITS. THE CONTRACTOR SHALL BE RESPONSIBLE FOR

CONFORMANCE WITH ALL APPLICABLE PERMIT REQUIREMENTS DURING THE

EXECUTION OF THE WORK AND PRIOR TO FINAL ACCEPTANCE BY THE

GOVERNMENT. ADDITIONAL DETAILS ON CONTRACTOR RESPONSIBILITIES ARE

PROVIDED IN THE SPECIFICATIONS.

10. ALL NON-PAVED DISTURBED AREAS SHALL BE RESTORED AS SHOWN ON THE

PLANS.

11. THE CONTRACTOR SHALL ACCESS THE WORK AREAS USING THE PUBLIC

RIGHT-OF-WAY AND EXISTING EASEMENTS ONLY. CROSSING PRIVATE

PROPERTY TO ACCESS THESE AREAS WITHOUT WRITTEN PERMISSION FROM

THE PROPERTY OWNER IS PROHIBITED.

12. OTHER THAN PLANS THAT ARE ALREADY PART OF THE CONTRACT DOCUMENTS,

HISTORIC CONSTRUCTION DOCUMENTS ARE ALSO AVAILABLE FOR THE

POWERHOUSE, DAM INTAKE STRUCTURE, SPILLWAY, AND APPURTENANCES. IF

ADDITIONAL INFORMATION IS DESIRED, CONTRACTOR SHOULD SUBMIT

REQUEST TO THE COR.

13. TOPOGRAPHY SHOWN HERE REPRESENTS CONDITIONS EXISTING AT THE TIME

THE FIELD SURVEY WAS MADE (MAY & AUGUST 2014 AND JULY 2016).

14. WATER LEVEL IS SUBJECT TO CHANGE. THE CONTRACTOR IS RESPONSIBLE FOR

MAKING A DETERMINATION OF WATER LEVELS THAT MAY EXIST DURING

CONSTRUCTION.

15. MEASURES SHALL BE TAKEN TO PREVENT DEBRIS FROM FALLING FROM THE

EXISTING STRUCTURES AND BEING TRANSPORTED DOWNSTREAM.

16. ALL WORK FOR THE CONDITIONS SHOWN AS "PROPOSED", "FINISH", AND

"NEW" IS REQUIRED UNDER THIS CONTRACT.

MDEQ 50 % FREQUENCY DISCHARGE VALUES (HALF OF FLOWS ARE GREATER AND

HALF ARE LESS) FOR THE SUMMER MONTHS DURING WHICH CONSTRUCTION WILL

TAKE PLACE:

MAY 310 CFS

JUNE 270 CFS

JULY 240 CFS

AUG 230 CFS

SEPT 240 CFS

OCT 250 CFS

NOV 270 CFS

DEC 270 CFS

MDEQ PROVIDED ANNUAL PEAK FLOOD DISCHARGE VALUES:

50% (2 YEAR) 750 CFS

10% (10 YEAR) 1200 CFS

2% (50 YEAR) 1600 CFS

1% (100 YEAR) 1700 CFS

0.5% (200 YEAR) 1900 CFS

0.2% (500 YEAR) 2000 CFS

THE DESIGN DISCHARGE FOR THE DAM BREACHING PORTION OF THIS PROJECT IS

THE 10% (10 YEAR) FLOOD (1200 CFS).

TO COMPLY WITH THE MICHIGAN DEPARTMENT OF ENVIRONMENTAL QUALITY

REGULATION OF A MAXIMUM DEWATERING RATE OF 1 FT/DAY SHALL BE

MAINTAINED AT ALL TIMES FOR SABIN IMPOUNDMENT. CONTRACTOR SHALL

SURVEY WATER SURFACE ELEVATION AT THE DAM EVERY 12 HOURS, TO VERIFY

THIS REQUIREMENT IS BEING MET. DURING THE FINAL DEWATERING STAGE

THROUGH THE TEMPORARY BULK BAG COFFERDAM AN ACCELERATED

DEWATERING RATE IS ALLOWED. DURING THIS FINAL PHASE, THE DEWATERING

RATE SHALL NOT EXCEED HALF A FOOT PER HOUR.

SPECIFIC SEQUENCES AND REQUIREMENTS RELATED TO DEMOLITION OF THE

SPILLWAY ARE PROVIDED HEREIN AND HAVE BEEN EVALUATED BY THE ENGINEER

TO ALLOW PASSAGE OF FLOWS THROUGH THE SPILLWAY UNDER A 10-YEAR FLOW

SCENARIO. SEQUENCE, MEANS, AND METHODS FOR SAFE DEMOLITION OF THE

POWERHOUSE ARE THE RESPONSIBILITY OF THE CONTRACTOR

PUBLIC UTILITIES

THE EXISTING UTILITIES LISTED BELOW AND SHOWN ON THESE PLANS REPRESENT

THE BEST INFORMATION AVAILABLE AS OBTAINED ON OUR SURVEYS. THIS

INFORMATION DOES NOT RELIEVE THE CONTRACTOR OF THE RESPONSIBILITY TO BE

SATISFIED AS TO IT'S ACCURACY AND THE LOCATION OF EXISTING UTILITIES.

NAME OF OWNER TYPE OF UTILITY

TRAVERSE CITY LIGHT AND POWER ELECTRICAL

ATTENTION: ROD SOLAK

CONSTRUCTION COORDINATOR

1131 HASTINGS ST.

TRAVERSE CITY, MI 49686

RSOLAK@TCLP.ORG

231-932-4554

DTE GAS

ATTENTION: MATT LOGAN

PI COORDINATOR

1250 MICHCONLANE

KALKASKA, MI 49646

LOGANM@DTEENERGY.COM

231-258-3785

SUGGESTED CONSTRUCTION SEQUENCING

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

FLOW

FLOW

REFER TO RIVER RESTORATION PLAN SHEETS FOR

WORK PERTAINING TO RIVER CHANNEL AND

FLOODPLAIN RESTORATION, EXCAVATION, AND

ENGINEERED RIFFLE AND POOL DESIGNS.

GENERAL NOTE:

SURVEY BYBENCHMARKS (DATUM NAVD 88)

BM# 1 FOUND RAILROAD SPIKE IN POWER POLE APPROXIMATELY 70'

EAST OF THE EAST EDGE OF THE SPILLWAY

BM# 2 SET SPIKE IN POWER POLE APPROXIMATELY 125' WEST OF THE

POWERHOUSE AND SOUTH OF ACCESS DRIVE

SABIN DAM TOPOGRAPHY

SURVEY BYDESCRIPTION

BATHYMETRY DATA WITHIN SABIN IMPOUNDMENT WAS COLLECTED BY

INTERFLUVE, INC. BETWEEN JULY 29 AND 31, 2014. DATA WAS COLLECTED

USING A SONAR DEVICE ATTACHED TO A BOAT WITH SINGLE BEAM ECHO

SOUNDER. SUPPLEMENTAL TOPOGRAPHIC AND BATHYMETRIC DATA

DOWNSTREAM OF SABIN DAM COLLECTED BY GROUND SURVEY JULY, 2016.

SABIN IMPOUNDMENT BATHYMETRY &

DOWNSTREAM TOPOGRAPHY

SURVEY BY

LIDAR DATA WAS COLLECTED WITHIN GRAND TRAVERSE COUNTY BY THE

COUNTY. 2' CONTOUR INTERVALS ARE SHOWN ON THIS DRAWING.

GRAND TRAVERSE

COUNTY LIDAR

GRAND TRAVERSE COUNTY

DESCRIPTION

ACCESS ROAD

KEYSTONE RD.

CA

SS

R

OA

D

LEGEND

PROJECT BOUNDARY

SUGGESTED

EXISTING MAJOR

OVERHEAD ELECTRIC

WETLAND AREA

CONTROL POINTS

ACCESS ROUTE

PROPERTY LINE

WETLA

ND AREA

WETLA

ND AREA

WETLA

ND AREA

WETLA

ND AREA

WETLA

ND AREA

WETLA

ND AREA

WETLA

ND AREA

WETLA

ND AREA

WETLA

ND AREA

PARCEL #

05-027-013-00

(PUBLIC)

PROPOSED

ACCESS ROAD

PROPOSED

ACCESS ROAD

TREE LINE

FIBER OPTIC CABLE

GE

NE

RA

L P

LA

N

OF

S

IT

E

T-2.1

APPROXIMATE LOCATION OF

UNDERGROUND FIBER OPTIC CABLE

AT APPROXIMATE ELEVATION OF 591.1 FT

(NAVD 88)

NOTE: CONTRACTOR SHOULD EXERCISE

CAUTION WHEN EXCAVATING TO WITHIN

10 FEET OF THE FIBER OPTIC

CABLE LINE.

POWERHOUSE.

SPILLWAY

SABIN IMPOUNDMENT

BOARDMAN RIVER

PROJECT

BOUNDARY

PARCEL #

05-027-014-00

(PUBLIC)

PARCEL #

05-027-001-10

(PRIVATE)

PARCEL #

05-065-900-00

(PRIVATE)

PARCEL #

05-027-033-00

(PUBLIC)

PARCEL #

05-027-036-00

(PUBLIC)

SEE BREACHING &

STRUCTURAL DEMOLITION

SHEETS

EASEMENT LINES

AECOM DELINEATED WETLANDS

JUNE 21-24 AND JULY 22, 2016

THIS SHEET SHOWS SOME WORK DONE

UNDER THE BOARDMAN DAM REMOVAL PROJECT

WETLAND SURVEY

COMPLETED BY

AECOM JUNE 21-24

AND JULY 22, 2016

LIMITS OF DISTURBANCE

PROJECT

BOUNDARY

LIMITS OF

DISTURBANCE

LIMITS OF

DISTURBANCE

END OF CONSTRUCTION

LIMITS FOR BOARDMAN PROJECT

START OF CONSTRUCTION

LIMITS FOR SABIN PROJECT

CP 1

CP 3

CP 2

CP 4

CP 5 CP 6

CP 7

CP 8

CP 10

CP 13

CP 14

CP 9

CP 11

CP 12

CASS ROAD

PROPOSED EDGE

OF RIVER CHANNEL

PROPOSED BOTTOM

OF RIVER CHANNEL

CONTOUR LINE

COORDINATE SYSTEM: STATE PLANE

ZONE: MICHIGAN CENTRAL 2112

ELLIPSOID: GRS 80

HORIZONTAL DATUM: NAD 83 (CORS 2011)

VERTICAL DATUM: NAVD 88

GEOID: GEOID 12A

UNITS: INTERNATIONAL FEET

SURVEY GENERAL NOTES

BENCHMARKS FOUND

1. BM N 509738.03 E 19358656.91 Z 619.58

RAILROAD SPIKE IN POWER POLE APPROXIMATELY 70 FEET

FROM EAST EDGE OF SPILLWAY.

BENCHMARKS SET

1. BM N 509740.04 E 19358290.32 Z 628.53

SET SPIKE IN POWER POLE APPROXIMATELY 125 FEET WEST

OF POWERHOUSE BUILDING, ON THE SOUTH SIDE OF

ACCESS DRIVE.

BENCHMARKS

THERE ARE NO GOVERNMENT CORNERS WITHIN THE PROJECT LIMITS.

GOVERNMENT CORNERS

NO ALIGNMENT POINTS WERE SET AS PART OF THIS PROJECT.

ALIGNMENT(S) POINTS

CP 1 N 509861.7 E 19358005.56 Z 658.5

CP2 N 509761.2 E 19358229.97 Z 635.47

CP3 N 509667 E 19358252.08 Z 642.02

CP4 N 509746.9 E 19358379.71 Z 619.48

CP5 N 509785.6 E 19358507.07 Z 605.17

CP6 N 509919.9 E 19358511.09 Z 592.27

CP7 N 509743.1 E 19358584.24 Z 617.7

CP8 N 509735.4 E 19358650.29 Z 618.29

CP9 N 509695.9 E 19358650.29 Z 618.14

CP10 N 509704.6 E 19358859.02 Z 617.75

CP11 N 509606 E 19359132.31 Z 623.07

CP12 N 509514.4 E 19359213.58 Z 627.82

CP13 N 509429.1 E 19359278.15 Z 630.43

CP14 N 510230.8 E 19359011.21 Z 596.83

CONTROL POINTS SET

2. BM N 506831.99 E 19357703.89 Z 655.15

SET SPIKE IN POWER POLE 36' WEST OF CASS ROAD

CENTERLINE 61' SOUTH OF PC OF CURVE.

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

FL

OW

05-027-014-00

05-065-900-00

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

SHEET

AREA

00 50' 100'

BOARDMAN RIVER

LEGEND

OR SHRUB LINE

EDGE OF TREE AND/

OHE

PROPERTY LINE

PAVEMENT BOUNDARY

EXISTING MAJOR

FENCE LINE

OVERHEAD ELECTRIC

WETLAND AREA

WATER SURFACE

ELEVATION AT TIME

CONTOUR LINE

EXISTING MINOR

CONTOUR LINE

RIP RAP MATERIAL

EXISTING

POWERHOUSE

HISTORICAL OVERFLOW

CHANNEL

EXISTING WATER

SURFACE ELEVATION

609.84' (MAY 2014)

SABIN IMPOUNDMENT

PARCEL #

05-027-013-00

GRAND TRAVERSE COUNTY

PARCEL #

05-027-014-00

GRAND TRAVERSE COUNTY

ROAD COMMISSION

PARCEL #

05-027-013-00

GRAND TRAVERSE COUNTY

PARCEL #

05-027-001-00

PRIVATE

PARCEL #

05-027-033-00

GRAND TRAVERSE COUNTY

SO

IL

BO

RI

NG

LO

CA

TI

ON

M

AP

T-3.0

TETRAHEDRON

RIP RAP MATERIAL

EXISTING

SPILLWAY

DOWNSTREAM

WSE = ~592

(MAY 2014)

EXISTING

INTAKE

SOIL BORING LOCATIONS

SOIL BORING

LOCATION (TYP.)

OF SURVEY

AECOM DELINEATED WETLANDS

JUNE 21-24 AND JULY 22, 2016

B-1

B-2 B-3

B-4

(AECOM, 2016)

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

LIMITS OF CONSTRUCTION

KEYSTONE RD.

LEGEND

COUNTY PROPERTY LINE

CONSTRUCTION ACCESS

TEMPORARY ACCESS,

WORK & STORAGE

EASEMENT (2.01 acre)

LIMITS OF DISTURBANCE

ROAD

LIMITS OF COUNTY

PROPERTY

CASS RD.

SABIN

IMPOUNDMENT

SABIN

IMPOUNDMENT

CHANNEL &

FLOODPLAIN

IMPROVEMENT

EASEMENT (12.34 acre)

LIMITS OF

CONSTRUCTION (43.96

acre)

STATE LOCATION MAP

GRAND TRAVERSE

COUNTY

RE

AL

E

ST

AT

E

PL

AN

CASS RD.

CONSTRUCTION ACCESS,

WORK & STORAGE EASEMENT

FROM GRAND TRAVERSE COUNTY

CONSTRUCTION ACCESS,

WORK & STORAGE EASEMENT

FROM GRAND TRAVERSE COUNTY

EXISTING

POWERHOUSE& SPILLWAY

CONSTRUCTION ACCESS,

WORK & STORAGE EASEMENT

FROM GRAND TRAVERSE COUNTY

KEYSTONE RD.

CA

SS

R D.

T- .1

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

WOODEN FOOT BRIDGE

(PROTECT)

BOARDWALK

(PROTECT)

TRAIL

FL

OW

05-027-014-00

05-065-900-00

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

SHEET

AREA

00 50' 100'

BOARDMAN RIVER

LEGEND

OR SHRUB LINE

EDGE OF TREE AND/

OHE

PROPERTY LINE

PAVEMENT BOUNDARY

EXISTING MAJOR

FENCE LINE

OVERHEAD ELECTRIC

WETLAND AREA

WATER SURFACE

ELEVATION AT TIME

CONTOUR LINE

EXISTING MINOR

CONTOUR LINE

RIP RAP MATERIAL

EXISTING

POWERHOUSE

HISTORICAL OVERFLOW

CHANNEL

EXISTING WATER

SURFACE ELEVATION

609.84' (MAY 2014)

SABIN IMPOUNDMENT

PARCEL #

05-027-013-00

GRAND TRAVERSE COUNTY

PARCEL #

05-027-014-00

GRAND TRAVERSE COUNTY

ROAD COMMISSION

PARCEL #

05-027-013-00

GRAND TRAVERSE COUNTY

PARCEL #

05-027-001-00

PRIVATE

PARCEL #

05-027-033-00

GRAND TRAVERSE COUNTY

15" CMP

EX

IS

TI

NG

S

IT

E

TO

PO

GR

AP

HY

B-0.1

TETRAHEDRON

RIP RAP MATERIAL

EXISTING

SPILLWAY

EXISTING

INTAKE

RIVER ACCESS

(REMOVE & RETURN TO OWNER)

RIVER ACCESS

(REMOVE AND RETURN TO OWNER)

OF SURVEY

AECOM DELINEATED WETLANDS

JUNE 21-24 AND JULY 22, 2016

STAIRS

(TO BE REMOVED)

TRAIL

EXISTING EARTHEN DAM

EMBANKMENT CREST = ~618

DOWNSTREAM

WSE = ~592

(MAY 2014)

NOTE: ALL REMOVED/SALVAGED TRAIL AND RIVER ACCESS

APPURTENANCES TO BE VERIFIED WITH OWNER. CARE SHALL BE

TAKEN WHEN REMOVING CEDAR FENCING.

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

SHEET

AREA

CASS ROAD

00 100' 200'

LEGEND

OR SHRUB LINE

EDGE OF TREE AND/

OHE

PAVEMENT BOUNDARY

EXISTING MAJOR

FENCE LINE

OVERHEAD ELECTRIC

WETLAND BOUNDARY

WATER SURFACE

ELEVATION

CONTOUR LINE

EXISTING MINOR

CONTOUR LINE

EQUIPMENT STAGING

EQUIPMENT STAGING

MATERIAL STORAGE

AREA / LEAVE OPEN FOR

POSSIBLE SPOILS AREA C

TEMPORARY CONSTRUCTION

ENTRANCE

TEMPORARY CONSTRUCTION

ENTRANCE

PROPOSED

ACCESS ROAD

EQUIPMENT STAGING

MATERIAL STORAGE

GE

NE

RA

L S

IT

E

PL

AN

B-1.1

POWERHOUSE

SPILLWAY

CA

SS

R

OA

D

RIP RAP

MATERIAL

TETRAHEDRON

RIPRAP

MOVE EXISTING GATE AND REINSTALL

APPROXIMATELY 100 FEET

BACK FROM KEYSTONE ROAD

TEMPORARY CONSTRUCTION

ENTRANCE (SEE DETAIL ON SHEET B-1.3)

EQUIPMENT STAGING

KE

YS

TO

NE

R

OA

D

CONTROL POINT 1

NORTHING: 509861.7

EASTING: 19358005.56

CONTROL POINT 2

NORTHING: 509761.2

EASTING: 19358229.97

CONTROL POINT 3

NORTHING: 509667

EASTING: 19358252.08

CONTROL POINT 4

NORTHING: 509746.9

EASTING: 19358376.718

CONTROL POINT 5

NORTHING: 509785.6

EASTING: 19358507.07

CONTROL POINT 6

NORTHING: 509919.9

EASTING: 19358511.09

CONTROL POINT 7

NORTHING: 509743.1

EASTING: 19358584.24

CONTROL POINT 8

NORTHING: 509735.4

EASTING: 19358650.29

CONTROL POINT 9

NORTHING: 509695.9

EASTING: 19358759.3

CONTROL POINT 10

NORTHING: 509704.6

EASTING: 19358859.02

CONTROL POINT 11

NORTHING: 509606

EASTING: 19359132.31

CONTROL POINT 12

NORTHING: 509514.4

EASTING: 19359213.58

CONTROL POINT 13

NORTHING: 509429.1

EASTING: 19359278.15

CONTROL POINT 14

NORTHING: 510230.8

EASTING: 19359011.21

SURVEY CONTROL

POINT

LIMITS OF

DISTURBANCE

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

BIRMLEY RD

K

EY

ST

O N

E

C

ASS R

D

D R

AC

KA

R D

SABIN

POND

BO

AR

D

BROAD

RD

DIPLEY RD

SHEET

AREA

OHE

OHE

OHE

OHE

OHE

OHE

OHE

00 100' 200'

MATERIAL STORAGE

AREA

WETLAND AREA

WETLAND AREA

EQUIPMENT STAGING

AREA

TEMPORARY CONSTRUCTION ENTRANCE

(SEE DETAIL SE50 - SHEET B-1.3)

CONSTRUCTION

ACCESS ROAD

LEGEND

OHE

PAVEMENT BOUNDARY

EXISTING MAJOR

OVERHEAD ELECTRIC

ACCESS ROAD

CONTOUR LINE

EXISTING MINOR

CONTOUR LINE

CONSTRUCTION ACCESS ROAD

EXISTING TREE

LINE

EXISTING TREE

LINE

POWERHOUSE

RELIC DAM AND

SPILLWAY

TEMPORARY CONSTRUCTION

ENTRANCE

(SEE DETAIL SE50 - SHEET B-1.3)

SILT FENCE

(SEE DETAIL SE26 - SHEET B-1.3)

SILT FENCE (SEE DETAIL

SE26 - SHEET B-1.3)

SILT FENCING

SILT FENCE (SEE DETAIL

SE26 - SHEET B-1.3)

GRAVEL ACCESS

PAD

SPILLWAY

1. THE CONTRACTOR SHALL COMPLY WITH GRAND TRAVERSE COUNTY

RULES & REGULATIONS FOR SOIL EROSION CONTROL & SUBMIT A

SCHEDULE OF SOIL EROSION ACTIVITIES TO THE LOCAL ENFORCING

AGENCY PRIOR TO ANY EARTH CHANGE AND AFTER RECEIVING A NOTICE

OF COVERAGE AND COMPLIANCE. AT COMPLETION OF CONSTRUCTION

ACTIVITIES OR UPON REQUEST FOR REVIEW, SUBMIT INSPECTION LOG

BOOK TO THE COUNTY AND THE COR.

2. EROSION AND SEDIMENTATION CONTROL MEASURES SHALL BE

CATEGORIZED AS INITIAL, INTERIM, AND FINAL MEASURES. INITIAL

MEASURES SHALL BE IMPLEMENTED PRIOR TO ANY MAJOR SOIL

DISTURBANCE ON THE SITE, AND SHALL BE LOCATED AT AND ADJACENT

TO AREAS THAT WILL BE DISTURBED AT THE START OF CONSTRUCTION

(TEMPORARY ACCESS ROADS, ACCESS ROAD ENTRANCE/EXIT POINTS

FROM THE SITE, AND DOWNSLOPE OF THE EXCAVATIONS AT THE DAM,).

INTERIM MEASURES SHALL BE APPLIED TO AREAS THAT WILL BE

DISTURBED AS CONSTRUCTION PROGRESSES (DOWNSLOPE OF SPOIL

DISPOSAL AREAS, STOCKPILE PERIMETERS). FINAL MEASURES SHALL BE

APPLIED UPON COMPLETION OF CONSTRUCTION, AND MAY CONSIST OF

MAINTENANCE AND UPGRADES OF PREVIOUSLY PLACED INITIAL OR

INTERIM MEASURES.

3. ANY DISTURBED AREAS THAT WILL BE LEFT EXPOSED MORE THAN 30

DAYS, AND NOT SUBJECT TO CONSTRUCTION TRAFFIC, WILL

IMMEDIATELY RECEIVE TEMPORARY SEEDING AS SPECIFIED IN

SPECIFICATION SECTION 32 90 00.

4. CONTRACTOR SHALL FENCE OFF AND PROTECT TREES/AREAS

DESIGNATED BY COR.

5. THE LOCATION OF ANY STOCKPILES SHALL BE DESIGNATED BY THE COR

PRIOR TO CONSTRUCTION. THIS AREA SHALL BE ENCLOSED BY SILT FENCE

A REASONABLE DISTANCE FROM THE TOE OF SLOPE UNTIL SUCH TIME IT

IS USED.

EROSION CONTROL NOTES

WETLAND AREA

WETLAND AREA

WETLAND AREA

WETLAND AREA

WETLAND AREA

W

ET

LA

ND

A

RE

A

WETLAND AREA

SILT FENCE (SEE DETAIL

SE26 - SHEET B-1.3)

EXISTING 15' CMP

SO

IL

ER

OS

IO

N

AN

D

SE

DI

ME

NT

AT

IO

N

CO

NT

RO

L P

LA

N

B-1.2

RIP RAP

MATERIAL

TETRAHEDRON

RIPRAP

6. A CRUSHED STONE, STABILIZED CONSTRUCTION ACCESS PAD WILL BE

INSTALLED WHEREVER A CONSTRUCTION ACCESS ROAD INTERSECTS A

PAVED ROADWAY. SAID PAD WILL MEET THE REQUIREMENTS OF THE

TEMPORARY CONSTRUCTION ENTRANCE DETAIL ON SHEET B-1.3.

7. SLOPES STEEPER THAN 1V:4H (25%) LOCATED WITHIN THE DAM

BREACHING AREA ARE TO BE STABILIZED WITH EROSION CONTROL

BLANKETS PER SECTION 31 40 00.

8. ALL WETLANDS NOT LOCATED WITHIN LIMITS OF DISTURBANCE SHALL

BE PROTECTED WITH SILT FENCE AND SHALL NOT BE DISTURBED.

9. CONCRETE RUBBLE MAY BE SALVAGED AND USED FOR TEMPORARY

EROSION CONTROL, BUT ALL METAL SHALL BE CUT FLUSH AND

DISPOSED OF OFF-SITE.

SILT FENCE

(SEE DETAIL SE26 - SHEET B-1.3)

WETLAND BOUNDARY

TEMPORARY CONSTRUCTION

ENTRANCE (SEE DETAIL SE50 - SHEET B-1.3)

SILT FENCE

(SEE DETAIL SE26 - SHEET B-1.3)

WETLAND AREA

WETLAND AREA

BEAVER POND PARKING AREA

EQUIPMENT STAGING

BEAVER POND PARKING AREA ACCESS OFF OF CASS ROAD

EQUIPMENT

STAGING AREA

MATERIAL

STORAGE AREA

TEMPORARY IN-CHANNEL

SEDIMENT TRAPS

EQUIPMENT STAGING

AREA

SILT FENCE

(SEE DETAIL SE26 - SHEET B-1.3)

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

SE50

6" MIN. 1"-3" CLEAN WASHED STONE

6" MIN. OF 1"-3" CLEAN WASHED STONE

20' RADIUS

12" MIN.

6" MIN. OF 1"-3" CLEAN WASHED STONE10'EXISTING

PAVEMENT

1:4 OR

FLATTER

MATCH ELEVATION

OF TOP OF EXISTING

PAVEMENT

EXCAVATE TO CONFORM

TO PAVEMENT OR CURB,

SEE JOIN DETAIL

EXISTING PAVED

TAPER AT ALL EDGES

BERM, 8"

HEIGHT BY 36"

WIDTH

50' MIN.

20' MIN

NON-WOVEN GEOTEXTILE

FABRIC

TAPER EDGES

AT 2H : 1V

ORIGINAL

GROUND

6"

MIN

12"

TYP CROSS SLOPE

3% OR FLATTER

JOIN DETAIL

PERSPECTIVE

SECTION A-A

NON-WOVEN GEOTEXTILE FABRIC

SPACING PER MANUF.

MI

N.1'

SECTION A-A

GEOTEXTILE FILTER FABRIC

FASTENED ON UPHILL SIDE

TOWARDS EARTH

DISRUPTION

RIDGE OF COMPACTED EARTH

ON UPHILL SIDE OF GEOTEXTILE

FILTER FABRIC

6"x6"

ANCHORING

TRENCH

GEOTEXTILE FABRIC SHALL

BE WRAPPED AROUND EACH

FENCE POST

SILT FENCE A

SILT FENCE B

VIEW B-B

SILT FENCE JOINT

FRONT VIEW

GEOTEXTILE FILTER FABRIC

REFER TO M.D.O.T. SOIL EROSION &

SEDIMENTATION CONTROL MEASURES R-96-B

UNDISTURBED VEGETATIONGEOTEXTILE

FILTER

FABRIC

FENCE

POST

COMPACTED

EARTH

SH

EE

T

FL

OW

SILT FENCE JOINT,

REFER TO VIEW B-B

6" ANCHOR

TRENCH

UNDISTURBED

VEGETATION

SH

EE

T

FL

OW

A

TOE-IN BLANKET 8"

MIN. AT TOP (TYP.

BOTH SIDES)

REFER TO M.D.O.T. SOIL EROSION &

SEDIMENTATION CONTROL MEASURES R-96-B

EROSION CONTROL BLANKETS

STAPLING PATTERN PER MANUF.

RECOMMENDATIONS

REFER TO PLANS

FOR SLOPES & WIDTHS

SE48

SE50

6" MIN. OF MDOT 21 AA NON-WOVEN GEOTEXTILE

FABRIC

TAPER EDGES

AT 2H : 1V

ORIGINAL

GROUND

6"

MIN

CROSS SLOPE

3% OR FLATTER

SECTION A-A

SE26

20'

FILL AS NECESSARY

BETWEEN AGGREGATE

AND GEOTEXTILE

SLOPE AWAY FROM ROAD FOR 5'

10'

AGGREGATE OR SIMILAR

NOTE: CONTRACTOR TO INSTALL TEMPORARY

CULVERTS AS NECESSARY TO ACCOMMODATE

SEAPS AND TRIBUTARIES.

ROADWAY

1. SILT FENCE SHALL BE INSPECTED AND REPAIRED IMMEDIATELY FOLLOWING ANY

SIGNIFICANT RAINFALL (EQUAL TO OR GREATER THAN 0.5 INCHES/24HR) AND DAILY DURING

PROLONGED RAINFALL. OTHERWISE, INSPECTION SHALL BE WEEKLY, AT A MINIMUM.

2. SEDIMENT SHALL BE REMOVED FROM THE UPSTREAM FACE OF THE SEDIMENT BARRIER

WHEN IT HAS REACHED A 1/3 DEPTH OF THE BARRIER HEIGHT.

3. REPAIR OR REPLACE BARRIER (FABRIC, POSTS, BALES, ETC.) WHEN DAMAGED.

4. IF THE SILT FENCE DRIFTS FROM ITS INSTALLED LOCATION OR BECOMES PARTIALLY

SUBMERGED, REPAIR SHOULD BE IMMEDIATELY UNDERTAKEN.

5. REGULARLY REMOVE ANY COLLECTED DEBRIS THAT IMPEDES THE FUNCTION OF THE FENCE.

INSPECTION AND MAINTENANCE:

SEDIMENT BARRIERS:

1. THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT

TRACKING OR FLOWING OF SEDIMENT ONTO PAVEMENT. THIS MAY REQUIRE PERIODIC

TOP DRESSING WITH ADDITIONAL STONE OR ADDITIONAL LENGTH AS CONDITIONS

DEMAND AND REPAIR AND/OR CLEANOUT OF ANY MEASURES USED TO TRAP SEDIMENT.

ALL SEDIMENT SPILLED, DROPPED, WASHED, OR TRACKED ONTO ROADWAYS (PUBLIC OR

PRIVATE) OR OTHER IMPERVIOUS SURFACES MUST BE REMOVED IMMEDIATELY.

2. WHERE ACCUMULATION OF DUST/SEDIMENT IS INADEQUATELY CLEANED OR

REMOVED BY CONVENTIONAL METHODS, A POWER BROOM OR STREET SWEEPER WILL BE

REQUIRED TO CLEAN PAVED OR IMPERVIOUS SURFACES. ACCESS POINTS TO THE WORK

AREA SHALL BE CONTROLLED.

STABILIZED CONSTRUCTION ACCESS:

SO

IL

ER

OS

IO

N

DE

TA

ILS

B-1.3

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

SHEET

AREA 00 20' 40'

LEGEND

OR SHRUB LINE

EDGE OF TREE AND/

OHE

PAVEMENT BOUNDARY

EXISTING MAJOR

FENCE LINE

OVERHEAD ELECTRIC

WETLAND BOUNDARY

WATER SURFACE

ELEVATION

CONTOUR LINE

EXISTING MINOR

CONTOUR LINE

APPROXIMATE STARTING WSE

AT BEGINNING OF BREACHING

OPERATION. WSE = ~609'

DA

M

BR

EA

CH

IN

G

PL

AN

V

IE

W

ST

AG

E

1 &

ST

AG

E

B-2.1

RIP RAP

MATERIAL

TETRAHEDRON

RIPRAP

1. REMOVE SPILLWAY CONCRETE STRUCTURE DOWN TO WSE AT TIME OF

CONSTRUCTION (~609'), LEAVING SPILLWAY WALLS AT ELEVATION 615.

LOWER GRADES BEHIND SPILLWAY SIDEWALLS TO NO HIGHER THAN EL.

614.5 PRIOR TO BEGINNING STAGE 2 WORK. EXCAVATE SEDIMENT OUT

FROM IN FRONT OF SPILLWAY INLET TO FACILITATE RIVER FLOW.

INSTALL SEDIMENT TRAP UPSTREAM OF SPILLWAY. [STAGE 1]

2. CONTINUE DEMOLITION OF SPILLWAY CONCRETE AT 1' INCREMENTS TO

DRAW DOWN POND. CONSTRUCT DOWNSTREAM RIVER ACCESS TO

THE WEST OF THE POWERHOUSE. [STAGE 2] WORK ON UPSTREAM

CHANNEL RESTORATION CAN BEGIN AT THIS STAGE SEE RIVER

RESTORATION SHEETS FOR GRADES AND DETAILS.

3. ONCE IMPOUNDMENT IS DRAWN DOWN BELOW POWERHOUSE INTAKE

SILL, INSTALL STOP LOGS AT INTAKE GATES TO ISOLATE FLOW TO THE

SPILLWAY. INSTALL FLOW DIVERSION BERM DOWNSTREAM BETWEEN

THE POWERHOUSE AND SPILLWAY OUTLET TO ISOLATE DOWNSTREAM

RIVER FLOW TO THE EAST SIDE OF THE RIVER CHANNEL. BEGIN

CONSTRUCTION OF RESTORED RIVER CHANNEL DOWNSTREAM OF THE

POWERHOUSE. [STAGE 3]

4. DURING THIS TIME FLOW WILL BE EXCLUSIVELY PASSING THROUGH THE

SPILLWAY. UPON REACHING ELEVATION 598.5' AT THE SPILLWAY, STOP

DEMOLITION AT THE SPILLWAY. GRADE BEHIND THE SPILLWAY

SIDEWALLS SHALL BE MAINTAINED AT 6 FEET ABOVE THE CURRENT

ELEVATION OF THE SPILLWAY (NO HIGHER OR LOWER) AT ALL TIMES

DURING STAGE 2, 3, AND 4 ACTIVITIES. THIS WILL BE STRICTLY

ENFORCED. INSTALL TEMPORARY BULK BAG COFFERDAM UPSTREAM OF

POWERHOUSE. DEMOLISH POWERHOUSE 6 FEET BELOW PROPOSED

RIVER CHANNEL GRADES AND CONSTRUCT RESTORED RIVER CHANNEL

THROUGH AND UPSTREAM OF FORMER POWERHOUSE. [STAGE 4]

5. ONCE RESTORED RIVER CHANNEL HAS BEEN FULLY CONSTRUCTED

THROUGH THE POWERHOUSE, BEGIN FINAL DRAW DOWN BY

INCREMENTALLY LOWERING THE BULK BAG COFFERDAM UPSTREAM OF

THE POWERHOUSE. [STAGE 5]

6. ONCE FLOW IS FULLY DIVERTED TO RESTORED RIVER CHANNEL,

DEMOLISH ANY REMAINING SPILLWAY STRUCTURE AT LEAST 2 FEET

BELOW FINAL GRADE AND FILL TO MATCH THE DESIGN PLANS AND

COMPLETE SITE RESTORATION ACTIVITIES. [STAGE 6]

DAM BREACHING SEQUENCE

CONTRACTOR TO NOTIFY AND

COORDINATE WITH UTILITY

COMPANIES AS DESIGNATED

IN SPECIFICATIONS POWERHOUSE

SPILLWAY

REMOVE GATES, EQUIPMENT,

AND WALKWAY. REMOVE SPILLWAY

TO ELEVATION 609'. PROTECT SPILLWAY

WALLS DURING DEMOLITION. [STAGE 1]

REFER TO SHEET B-2.2

FOR SECTION A-A

REFER TO SHEET B-2.2

FOR SECTION B-B

CONTINUE OGEE SPILLWAY REMOVAL

AT 1' INCREMENTS TO ELEVATION 606'

[STAGE 2]

ACCESS ROAD

PROPOSED MAJOR

CONTOUR LINE

PROPOSED MINOR

CONTOUR LINE

INSTALL SEDIMENT TRAP

(SEE SHEET R-3.2)

[STAGE 1]

REMOVE FENCE [STAGE 1]

REMOVE FENCE [STAGE 1]

REMOVE FENCE

CONSTRUCTED RIVER ACCESS [STAGE 2]

LOWER GRADE BEHIND

WALLS TO 614.5 [STAGE 1]

EXCAVATION

EQUIPMENT STAGING AREA

EQUIPMENT STAGING

LIMITS OF

DISTURBANCE

EQUIPMENT

STAGING AREA

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

10'

1.5H:1V 1.5 H:

1V

10'

LEGEND

EXISTING GROUND SURFACE

CONCRETE BOUNDARIES

EXISTING PROFILE THROUGH THE DAM POWERHOUSE AND SPILLWAY

(REFER TO B-2.1 FOR PLAN VIEW)

EXISTING PROFILE THROUGH SPILLWAY

(REFER TO B-2.1 FOR PLAN VIEW)

POWERHOUSE

WALKWAY

WALKWAY

TURBINE FLOOR

(EL. 603')

TAINTER GATE

STOP LOG GATE

FLOOR

WINGWALL

TETRAHEDRON

RIP RAP

WALKWAY

TAINTER GATE OPENING

APPROX. EXTENT

OF RELIC DAM

Feet

60300

H/V RATIO = 4:1H/V RATIO = 4:1

SHEETPILE

CONCRETE

SPILLWAY

BOTTOM OF

CONCRETE SPILLWAY

608.9' 600.3'

DA

M

PR

OF

ILE

V

IE

W

S

B-2.2

INITIAL DEMOLITION TO

ELEVATION 609' [STAGE 1]

DEMOLITION TO 598.5'

[STAGE 2] - [STAGE 4]

STARTING WSE = ~609'

STAGE 1

WSE = 606' ACHIEVED

DURING INCREMEMTAL

DRAWDOWN STAGE 2 - STAGE 3

APPROX. WSE = 600'

STAGE 4

STARTING

WSE = ~609'

STAGE1

WSE = 606' ACHIEVED

DURING INCREMEMTAL

DRAWDOWN STAGE 2 - STAGE 3

APPROX. WSE = 600'

STAGE 4

APPROXIMATE INTAKE

SILL ELEVATION 606'

TOP OF TETRAHEDRON

RIP RAP (EL. 599')

SECTION A-A SECTION B-B

REMOVE SOIL TO EL 614.5

AT END OF STAGE 1

INCREMENTALLY REMOVE

BACKFILL FROM WALLS, SUCH

THAT BACKFILL GRADE IS 6 FEET

ABOVE CURRENT SPILLWAY BREACH

ELEVATION (NO HIGHER OR LOWER)

[STAGES 2, 3, AND 4]

RE

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TO

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3/1 3/2

C

FL

OW

7+

.00

8+

.00

9+

.0

0+

.0

1+

.0

2+

.0

3+

.0

6+

7+

.00

8+

.0

9+

.0

0+

.0

1+

.0

2+

.0

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

SHEET

AREA 00 30' 60'

LEGEND

OR SHRUB LINE

EDGE OF TREE AND/

OHE

PAVEMENT BOUNDARY

EXISTING MAJOR

FENCE LINE

OVERHEAD ELECTRIC

WETLAND BOUNDARY

WATER SURFACE

ELEVATION

CONTOUR LINE

EXISTING MINOR

CONTOUR LINE

DURING STAGE 3

DRAWDOWN IS OCCURING

IN 1 FOOT INCREMENTS

DA

M

BR

EA

CH

IN

G

PL

AN

V

IE

W

ST

AG

E

B-3.1

RIP RAP

MATERIAL

TETRAHEDRON

RIPRAP

POWERHOUSE

INSTALL STOPLOGS AT

INTAKE GATE TO ISOLATE

FLOW TO THE SPILLWAY.

[STAGE 3]

(STOPLOGS AVAILABLE

ONSITE)

SPILLWAY

RELICT SPILLWAY

FROM OLD DAM

INSTALL FLOW

DIVERSION BERM

TO SEPARATE FLOW.

[STAGE 3]

INCREMENTALLY LOWER/REMOVE

THE OGEE SPILLWAY AT A RATE

NO FASTER THAN 1 FOOT PER DAY

TO ELEVATION 600'. COORDINATE WITH

UPSTREAM CHANNEL CONSTRUCTION

SEQUENCE. [STAGE 2]

REFER TO SHEET B-2.2

FOR SECTION B-B

ACCESS ROAD

RESTORED RIVER

CHANNEL BOTTOM. [STAGE 3]

RESTORED RIVER

CHANNEL TOP OF BANK.

[STAGE 3]

FLOW DIVERSION

STRUCTURE

THROUGH THE DOWNSTREAM FLOW DIVERSION BERM

H/V RATIO = 4:1

THROUGH THE DOWNSTREAM FLOW DIVERSION BERM

H/V RATIO = 4:1

FLOW DIVERSION BERM

CREST EL. 596

FLOW DIVERSION

BERM

EXISTING GROUND

SURFACE

EXISTING GROUND

SURFACE

12'

2:1 SIDE SLOPES

APPROXIMATE 10-YEAR

FLOOD WSE

PROPOSED MAJOR

CONTOUR LINE

PROPOSED MINOR

CONTOUR LINE

REFER TO SHEET B-2.2

FOR SECTION A-A

SECTION C-C

SECTION D-D

INTERFACE WHERE FILL MATERIAL

MEETS EXISTING GROUND SHOULD BE

CONSTRUCTED TO ENSURE ADEQUATE

BOND BETWEEN TWO MATERIALS

MDOT PLAIN

RIP RAP ARMORING

2 TIMES THE D50,

OR 1.5 FT THICK

MDOT PLAIN

RIP RAP ARMORING

INSTALL MDOT PLAIN RIPRAP

ARMORING FOR FLOW

DIVERSION STRUCTURE.

[STAGE 3]

GEOTEXTILE

LINER

1. REMOVE SPILLWAY CONCRETE STRUCTURE DOWN TO WSE AT TIME OF

CONSTRUCTION (~609'), LEAVING SPILLWAY WALLS AT ELEVATION 615.

LOWER GRADES BEHIND SPILLWAY SIDEWALLS TO NO HIGHER THAN EL.

614.5 PRIOR TO BEGINNING STAGE 2 WORK. EXCAVATE SEDIMENT OUT

FROM IN FRONT OF SPILLWAY INLET TO FACILITATE RIVER FLOW. INSTALL

SEDIMENT TRAP UPSTREAM OF SPILLWAY. [STAGE 1]

2. CONTINUE DEMOLITION OF SPILLWAY CONCRETE AT 1' INCREMENTS TO

DRAW DOWN POND. CONSTRUCT DOWNSTREAM RIVER ACCESS TO THE

WEST OF THE POWERHOUSE. [STAGE 2] WORK ON UPSTREAM CHANNEL

RESTORATION CAN BEGIN AT THIS STAGE SEE RIVER RESTORATION

SHEETS FOR GRADES AND DETAILS.

3. ONCE IMPOUNDMENT IS DRAWN DOWN BELOW POWERHOUSE INTAKE

SILL, INSTALL STOP LOGS AT INTAKE GATES TO ISOLATE FLOW TO THE

SPILLWAY. INSTALL FLOW DIVERSION BERM DOWNSTREAM BETWEEN

THE POWERHOUSE AND SPILLWAY OUTLET TO ISOLATE DOWNSTREAM

RIVER FLOW TO THE EAST SIDE OF THE RIVER CHANNEL. BEGIN

CONSTRUCTION OF RESTORED RIVER CHANNEL DOWNSTREAM OF THE

POWERHOUSE. [STAGE 3]

4. DURING THIS TIME FLOW WILL BE EXCLUSIVELY PASSING THROUGH THE

SPILLWAY. UPON REACHING ELEVATION 598.5' AT THE SPILLWAY, STOP

DEMOLITION AT THE SPILLWAY. GRADE BEHIND THE SPILLWAY

SIDEWALLS SHALL BE MAINTAINED AT 6 FEET ABOVE THE CURRENT

ELEVATION OF THE SPILLWAY (NO HIGHER OR LOWER) AT ALL TIMES

DURING STAGE 2, 3, AND 4 ACTIVITIES. THIS WILL BE STRICTLY

ENFORCED. INSTALL TEMPORARY BULK BAG COFFERDAM UPSTREAM OF

POWERHOUSE. DEMOLISH POWERHOUSE 6 FEET BELOW PROPOSED

RIVER CHANNEL GRADES AND CONSTRUCT RESTORED RIVER CHANNEL

THROUGH AND UPSTREAM OF FORMER POWERHOUSE. [STAGE 4]

5. ONCE RESTORED RIVER CHANNEL HAS BEEN FULLY CONSTRUCTED

THROUGH THE POWERHOUSE, BEGIN FINAL DRAW DOWN BY

INCREMENTALLY LOWERING THE BULK BAG COFFERDAM UPSTREAM OF

THE POWERHOUSE. [STAGE 5]

6. ONCE FLOW IS FULLY DIVERTED TO RESTORED RIVER CHANNEL,

DEMOLISH ANY REMAINING SPILLWAY STRUCTURE AT LEAST 2 FEET

BELOW FINAL GRADE AND FILL TO MATCH THE DESIGN PLANS AND

COMPLETE SITE RESTORATION ACTIVITIES. [STAGE 6]

DAM BREACHING SEQUENCE

INCREMENTALLY REMOVE BACKFILL

FROM WALLS, SUCH THAT BACKFILL

GRADE IS 6 FEET ABOVE CURRENT

SPILLWAY BREACH LEVEL (NO HIGHER

OR LOWER) [STAGE 3]

EXCAVATION

BERM CONSTRUCTED OF

GRANULAR FILL MATERIAL

RESTORED RIVER

CHANNEL ALIGNMENT

LIMITS OF

DISTURBANCE

EQUIPMENT STAGING

EQUIPMENT STAGING

APPROXIMATE 10-YEAR

FLOOD WSE

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

F

FL

OW

8+

.00

9+

.0

0+

.0

1+

.0

2+

.0

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

SHEET

AREA 00 20' 40'

LEGEND

OR SHRUB LINE

EDGE OF TREE AND/

OHE OHE

PAVEMENT BOUNDARY

EXISTING MAJOR

FENCE LINE

OVERHEAD ELECTRIC

WETLAND BOUNDARY

WATER SURFACE

ELEVATION

CONTOUR LINE

EXISTING MINOR

CONTOUR LINE

APPROXIMATE WSE = 600'

WITH ALL FLOW PASSING

THROUGH SPILLWAY

DA

M

BR

EA

CH

IN

G

PL

AN

V

IE

W

ST

AG

E

4 &

ST

AG

E

B-4.1

RIP RAP

MATERIAL

TETRAHEDRON

RIPRAP

POWERHOUSE

SPILLWAY

INCREMENTALLY LOWER/REMOVE

THE REMAINING SPILLWAY AT A RATE

NO FASTER THAN 1 FOOT PER DAY

TO ELEVATION 598.5'. COORDINATE

WITH UPSTREAM CHANNEL CONSTRUCTION.

[STAGE 4]

REFER TO SHEET B-2.2

FOR SECTION B-B

REFER TO SHEET B-4.2

FOR SECTION E-E.

RESTORED RIVER

CHANNEL BOTTOM.

(REFER TO SHEET R-1.2)

[STAGE 3]

RESTORED RIVER

CHANNEL TOP OF BANK.

(REFER TO SHEET R-1.2)

[STAGE 3]

REMOVE POWERHOUSE

SUPERSTRUCTURE AND

APPURTENANCES.

[STAGE 4]

TEMPORARY BULK BAG COFFERDAM

TO ALLOW FOR DEMOLITION OF

POWERHOUSE AND CONSTRUCTION OF

RESTORED RIVER CHANNEL IN

NON-FLOWING CONDITIONS. [STAGE 4]

ACCESS ROAD

FLOW DIVERSION

STRUCTURE

TEMPORARY BULK BAG COFFERDAM

WRAP IMPERMEABLE

LAYER OVER UPSTREAM

SIDE OF BAGS

STACK TO HEIGHT NECESSARY FOR DIVERSION

PER MANUFACTURE'S RECOMMENDATION

MINIMUM SANDBAGS SIZE 3'X3'X3'

WITH ENCLOSED TOP

NOTE: BULK BAGS TO BE INSTALLED PER MANUFACTURE'S RECOMMENDATIONS. AFTER POWERHOUSE IS FULLY DEMOLISHED AND RIVER CHANNEL FULLY RESTORED DOWNSTREAM OF THE BAGS, REMOVE TOP ROW OF BULK BAGS, STARTING AT CHANNEL CENTERLINE, AT RATE THAT PRODUCES MAXIMUM DRAWDOWN IN IMPOUNDMENT OF ONE FOOT PER DAY. REPEAT FOR SUBSEQUENT ROWS. ULTIMATE DRAWDOWN RATE TO BE DETERMINED BY SEDIMENT MANAGEMENT NEEDS.

TOP OF BULK BAG

EL. 604.00

PLACE MDOT HEAVY RIPRAP LET DOWN RAMP

DOWNSTREAM OF BULK BAG COFFERDAM

WITHIN CHANNEL. ROCK TO BE CONSISTENT

WITH PROPOSED CHANNEL BED MATERIAL.

REFER TO SHEET B-4.2

FOR SECTION F-F

PROPOSED MAJOR

CONTOUR LINE

PROPOSED MINOR

CONTOUR LINE

REFER TO SHEET B-2.2

FOR SECTION A-A

REMOVE PAVEMENT, CONCRETE,

AND APPURTENANCES. [STAGE 4]

AFTER DEWATERING THROUGH

THE SPILLWAY IS COMPLETE,

CONTRACTOR MAY REMOVE OR

BURY TETRAHEDRONS.

[STAGE 5]

NON-WOVEN GEOTEXTILE

SEPARATOR, MDOT 910

PLACE 12" OF MDOT 6 AAA

AGGREGATE STONE LAYER

AS BASE OF BULK BAG BERM.

EXCAVATE INTO EXISTING SEDIMENTS TO

PLACE BOTTOM OF BULK BAGS 1 FOOT BELOW

PROPOSED RIVER GRADE OF 596.

FLOW

DEMOLITION

EXTENT

SAWCUT EDGE [STAGE 4]

1. REMOVE SPILLWAY CONCRETE STRUCTURE DOWN TO WSE AT TIME OF

CONSTRUCTION (~609'), LEAVING SPILLWAY WALLS AT ELEVATION 615. LOWER

GRADES BEHIND SPILLWAY SIDEWALLS TO NO HIGHER THAN EL. 614.5 PRIOR TO

BEGINNING STAGE 2 WORK. EXCAVATE SEDIMENT OUT FROM IN FRONT OF

SPILLWAY INLET TO FACILITATE RIVER FLOW. INSTALL SEDIMENT TRAP UPSTREAM OF

SPILLWAY. [STAGE 1]

2. CONTINUE DEMOLITION OF SPILLWAY CONCRETE AT 1' INCREMENTS TO DRAW

DOWN POND. CONSTRUCT DOWNSTREAM RIVER ACCESS TO THE WEST OF THE

POWERHOUSE. [STAGE 2] WORK ON UPSTREAM CHANNEL RESTORATION CAN BEGIN

AT THIS STAGE SEE RIVER RESTORATION SHEETS FOR GRADES AND DETAILS.

3. ONCE IMPOUNDMENT IS DRAWN DOWN BELOW POWERHOUSE INTAKE SILL, INSTALL

STOP LOGS AT INTAKE GATES TO ISOLATE FLOW TO THE SPILLWAY. INSTALL FLOW

DIVERSION BERM DOWNSTREAM BETWEEN THE POWERHOUSE AND SPILLWAY

OUTLET TO ISOLATE DOWNSTREAM RIVER FLOW TO THE EAST SIDE OF THE RIVER

CHANNEL. BEGIN CONSTRUCTION OF RESTORED RIVER CHANNEL DOWNSTREAM OF

THE POWERHOUSE. [STAGE 3]

4. DURING THIS TIME FLOW WILL BE EXCLUSIVELY PASSING THROUGH THE SPILLWAY.

UPON REACHING ELEVATION 598.5' AT THE SPILLWAY, STOP DEMOLITION AT THE

SPILLWAY. GRADE BEHIND THE SPILLWAY SIDEWALLS SHALL BE MAINTAINED AT 6

FEET ABOVE THE CURRENT ELEVATION OF THE SPILLWAY (NO HIGHER OR LOWER)

AT ALL TIMES DURING STAGE 2, 3, AND 4 ACTIVITIES. THIS WILL BE STRICTLY

ENFORCED. INSTALL TEMPORARY BULK BAG COFFERDAM UPSTREAM OF

POWERHOUSE. DEMOLISH POWERHOUSE 6 FEET BELOW PROPOSED RIVER

CHANNEL GRADES AND CONSTRUCT RESTORED RIVER CHANNEL THROUGH AND

UPSTREAM OF FORMER POWERHOUSE. [STAGE 4]

5. ONCE RESTORED RIVER CHANNEL HAS BEEN FULLY CONSTRUCTED THROUGH THE

POWERHOUSE, BEGIN FINAL DRAW DOWN BY INCREMENTALLY LOWERING THE

BULK BAG COFFERDAM UPSTREAM OF THE POWERHOUSE. [STAGE 5]

6. ONCE FLOW IS FULLY DIVERTED TO RESTORED RIVER CHANNEL, DEMOLISH ANY

REMAINING SPILLWAY STRUCTURE AT LEAST 2 FEET BELOW FINAL GRADE AND FILL

TO MATCH THE DESIGN PLANS AND COMPLETE SITE RESTORATION ACTIVITIES.

[STAGE 6]

DAM BREACHING SEQUENCE

INCREMENTALLY REMOVE BACKFILL

FROM WALLS, SUCH THAT BACKFILL

GRADE IS 6 FEET ABOVE CURRENT

SPILLWAY BREACH LEVEL (NO HIGHER

OR LOWER) [STAGE 4]

EXCAVATION

NON-FLOWING,

STANDING WATER

RESTORED RIVER

CHANNEL ALIGNMENT

LIMITS OF DISTURBANCE

MDOT HEAVY

RIPRAP

EXTEND GEOTEXTILE

UNDER RIPRAP

RE

AD

Y

TO

A

DV

ER

TI

SE

3/1 3/2

Know what's

EXISTING POWERHOUSE INLET

ELEVATION APPROX. 606'

PROFILE THROUGH POWERHOUSE

(REFER TO B-4.1 FOR PLAN VIEW)

H/V RATIO = 4:1

LEGEND

EXISTING GROUND SURFACE

CONCRETE BOUNDARIES

Feet

40200

DA

M

BR

EA

CH

IN

G

PR

OF

ILE

V

IE

W

ST

AG

E

ST

AG

E

B-4.2

DEMOLITION OF

POWERHOUSE STAGE 4

FINAL RESTORED

RIVER CHANNEL

SEE SHEET R-1.2

FOR DETAILS

CONSTRUCT BULK BAGS TO

MINIMUM ELEVATION 604'

IN STAGE 4. INCREMENTALLY

LOWER IN STAGE 5.

APPROXIMATE

BASEFLOW WSE = 600'

PLACE MDOT HEAVY RIP RAP LET DOWN

APRON DOWNSTREAM OF BULK BAGS

WITHIN CHANNEL.

PROFILE PROPOSED TEMPORARY

(REFER TO B-4.1 FOR PLAN VIEW)

H/V RATIO = 4:1

TOP OF BULK BAGS

AT 604'

PROPOSED RIVER

CHANNEL INVERT AT 596'

EXISTING GROUND

SURFACE

PROPOSED 10YR DESIGN

FLOOD ELEVATION

WSE = APPROX 603.5'

SECTION E-E

SECTION F-F

BOTTOM OF BULK BAGS AT 595'

APPROXIMATE 10-YEAR

DESIGN FLOOD WSE = 603.5'

PLACE 12" MDOT 6 AAA AGGREGATE BASE

LAYER UNDER BULK BAGS AS SPECIFIED IN

THE SPECIFICATIONS.

MDOT 6 AAA AGGREGATE BASE

LAYER UNDER BULK BAGS

PLACE GEOTEXTILE LAYER UNDER

AGGREGATE BASE AND RIPRAP LET DOWN

GEOTEXTILE LAYER

BULK BAG COFFERDAM

1.5:1

INLET TO EXISTING

SPILLWAY

IMPERMEABLE LAYER

RE

AD

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TO

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3/1 3/2

HAMMOND RD W

BIRMLEY RD

N K

EY

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O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

HAMMOND RD W

BIRMLEY RD

N K

EY

ST

O N

E R

D

C

ASS R

D

D R

AC

KA

R D

LA

F

R

AN

N GARFIE

N R

U

SC

H R

D

HARTMAN RD

BOARDMAN

IMPOUNDMENT

SABIN

POND

BO

AR

D M

AN

R

IV

ER

BROAD

RD

DIPLEY RD

BLAIR TWP.

GARFIELD TWP.

SHEET

AREA 00 20' 40'

LEGEND

OHE

EXISTING MAJOR

OVERHEAD ELECTRIC

WETLAND BOUNDARY

CONTOUR LINE

EXISTING MINOR

CONTOUR LINE

DA

M

BR

EA

CH

IN

G

PL

AN

V

IE

W

ST

AG

E

B-5.1

MATCH EXISTING

FOR PROPOSED GRADING

PAVEMENT TO REMAIN

GB GB

EDGE OF FLOODPLAIN

(SEE SHEET R-1.2)

EDGE OF RIVER

BOTTOM

(SEE SHEET R-1.2)

RIVER TOP OF BANK

(SEE SHEET R-1.2)

EDGE OF FINAL GRADING/

DAYLIGHT LINE TO EXISTING

GROUND SURFACE

EDGE OF FINAL GRADING/

DAYLIGHT LINE TO EXISTING

GROUND SURFACE

REFER TO RIVER RESTORATION PLANS

FOR CHANNEL AND FLOODPLAIN GRADING

PROPOSED STORMWATER

BASIN

ACCESS ROAD TO BE

RESTORED

PROPOSED MAJOR

CONTOUR LINE

PROPOSED MINOR

CONTOUR LINE

MDOT PLAIN RIPRAP

INLET TRENCHES

MDOT PLAIN RIPRAP

OUTLET WEIR APRON

RIP RAP

1. REMOVE SPILLWAY CONCRETE STRUCTURE DOWN TO WSE AT TIME OF

CONSTRUCTION (~609'), LEAVING SPILLWAY WALLS AT ELEVATION 615.

LOWER GRADES BEHIND SPILLWAY SIDEWALLS TO NO HIGHER THAN EL.

614.5 PRIOR TO BEGINNING STAGE 2 WORK. EXCAVATE SEDIMENT OUT

FROM IN FRONT OF SPILLWAY INLET TO FACILITATE RIVER FLOW. INSTALL

SEDIMENT TRAP UPSTREAM OF SPILLWAY. [STAGE 1]

2. CONTINUE DEMOLITION OF SPILLWAY CONCRETE AT 1' INCREMENTS TO

DRAW DOWN POND. CONSTRUCT DOWNSTREAM RIVER ACCESS TO THE

WEST OF THE POWERHOUSE. [STAGE 2] WORK ON UPSTREAM CHANNEL

RESTORATION CAN BEGIN AT THIS STAGE SEE RIVER RESTORATION

SHEETS FOR GRADES AND DETAILS.

3. ONCE IMPOUNDMENT IS DRAWN DOWN BELOW POWERHOUSE INTAKE

SILL, INSTALL STOP LOGS AT INTAKE GATES TO ISOLATE FLOW TO THE

SPILLWAY. INSTALL FLOW DIVERSION BERM DOWNSTREAM BETWEEN

THE POWERHOUSE AND SPILLWAY OUTLET TO ISOLATE DOWNSTREAM

RIVER FLOW TO THE EAST SIDE OF THE RIVER CHANNEL. BEGIN

CONSTRUCTION OF RESTORED RIVER CHANNEL DOWNSTREAM OF THE

POWERHOUSE. [STAGE 3]

4. DURING THIS TIME FLOW WILL BE EXCLUSIVELY PASSING THROUGH THE

SPILLWAY. UPON REACHING ELEVATION 598.5' AT THE SPILLWAY, STOP

DEMOLITION AT THE SPILLWAY. GRADE BEHIND THE SPILLWAY

SIDEWALLS SHALL BE MAINTAINED AT 6 FEET ABOVE THE CURRENT

ELEVATION OF THE SPILLWAY (NO HIGHER OR LOWER) AT ALL TIMES

DURING STAGE 2, 3, AND 4 ACTIVITIES. THIS WILL BE STRICTLY

ENFORCED. INSTALL TEMPORARY BULK BAG COFFERDAM UPSTREAM OF

POWERHOUSE. DEMOLISH POWERHOUSE 6 FEET BELOW PROPOSED

RIVER CHANNEL GRADES AND CONSTRUCT RESTORED RIVER CHANNEL

THROUGH AND UPSTREAM OF FORMER POWERHOUSE. [STAGE 4]

5. ONCE RESTORED RIVER CHANNEL HAS BEEN FULLY CONSTRUCTED

THROUGH THE POWERHOUSE, BEGIN FINAL DRAW DOWN BY

INCREMENTALLY LOWERING THE BULK BAG COFFERDAM UPSTREAM OF

THE POWERHOUSE. [STAGE 5]

6. ONCE FLOW IS FULLY DIVERTED TO RESTORED RIVER CHANNEL,

DEMOLISH ANY REMAINING SPILLWAY STRUCTURE AT LEAST 2 FEET

BELOW FINAL GRADE AND FILL TO MATCH THE DESIGN PLANS AND

COMPLETE SITE RESTORATION ACTIVITIES. [STAGE 6]

DAM BREACHING SEQUENCE

STORMWATER BASIN CROSS SECTION

H/V RATIO = 4:1

SECTION A-A

STORMWATER BASIN SPILLWAY PROFILE

H/V RATIO = 4:1

SECTION B-B

BASIN BOTTOM DIMENSIONS:

4 FT WIDE X…