Spec_FY18_Sabin_Dam_RTA_12mar2018.pdf

FY18 Sabi n Dam Removal & Rest or at i on

PROJECT TABLE OF CONTENTS

DI VI SI ON 01 - GENERAL REQUI REMENTS

01 10 10 REAL ESTATE

01 11 00 SUMMARY OF WORK

01 29 01 MEASUREMENT AND PAYMENT

01 32 01. 00 10 PROJECT SCHEDULE

01 32 33 PHOTOGRAPHI C DOCUMENTATI ON

01 33 00 SUBMI TTAL PROCEDURES

01 35 00 SPECI AL PROJECT PROCEDURES

01 35 26 GOVERNMENTAL SAFETY REQUI REMENTS

01 41 00 REGULATORY REQUI REMENTS

01 42 00 SOURCES FOR REFERENCE PUBLI CATI ONS

01 45 00. 00 10 QUALI TY CONTROL

01 45 00. 10 10 QUALI TY CONTROL SYSTEM ( QCS)

01 45 00. 15 10 RESI DENT MANAGEMENT SYSTEM CONTRACTOR MODE( RMS CM)

01 50 00 CONSTRUCTI ON FACI LI TI ES AND TEMPORARY CONTROLS

01 57 20. 00 20 ENVI RONMENTAL PROTECTI ON

01 58 00 CONSTRUCTI ON PROJECTS AND SAFETY PERFORMANCE SI GNS

01 60 00 PRODUCT REQUI REMENTS

01 71 23 FI ELD ENGI NEERI NG

01 78 00 CLOSEOUT SUBMI TTALS

01 99 90 LI STI NG OF ENCLOSED DOCUMENTS, EXHI BI TS AND OTHER

ATTACHMENTS

DI VI SI ON 02 - EXI STI NG CONDI TI ONS

02 01 00 MAI NTENANCE OF EXI STI NG CONDI TI ONS

02 05 00 SI TE PREPARATI ON

02 30 00 GEOTECHNI CAL DATA

02 41 16 STRUCTURE DEMOLI TI ON

02 42 09 WASTE REMOVAL AND HANDLI NG

DI VI SI ON 31 - EARTHWORK

31 10 00 CLEARING

31 23 00 EARTHWORK

31 23 19 DEWATERING

31 36 00 STREAMBANK CONSTRUCTI ON

31 37 00 STREAMBED CONSTRUCTI ON

31 39 00 LARGE WOOD

31 40 00 SLOPE PROTECTI ON AND EROSI ON CONTROL

DI VI SI ON 32 - EXTERI OR I MPROVEMENTS

32 60 00 RI VER SI GNAGE

32 90 00 PLANTING

- - End of Pr oj ect Tabl e of Cont ent s - -

PROJECT TABLE OF CONTENTS Page 1

READY TO ADVERTI SE 12MAR2018

SECTI ON TABLE OF CONTENTS

DI VI SI ON 01 - GENERAL REQUI REMENTS

SECTI ON 01 10 10

REAL ESTATE

03/01

PART 1 GENERAL

1. 1 SUBMI TTALS

1. 2 REGULATORY REQUI REMENTS

1. 2. 1 Real Est at e Ri ght s

1. 2. 2 Addi t i onal Real Est at e Ri ght s

1. 3 PROJECT/ SI TE CONDI TI ONS

1. 3. 1 Locat i on and Ver i f i cat i on

1. 3. 2 Sur vey Mar ker s

1. 3. 2. 1 Semi per manent Mar ker s

1. 3. 2. 2 Tempor ar y Mar ker s

PART 2 PRODUCTS ( NOT APPLI CABLE)

PART 3 EXECUTI ON ( NOT APPLI CABLE)

- - End of Sect i on Tabl e of Cont ent s - -

SECTI ON 01 10 10 Page 1

SECTI ON 01 10 10

REAL ESTATE

03/01

PART 1 GENERAL

1. 1 SUBMI TTALS

Gover nment appr oval i s r equi r ed f or submi t t al s wi t h a " G" desi gnat i on;

submi t t al s not havi ng a " G" desi gnat i on ar e f or i nf or mat i on onl y or as ot her wi se desi gnat ed. When used, a desi gnat i on f ol l owi ng t he " G" desi gnat i on i dent i f i es t he of f i ce t hat wi l l r evi ew t he submi t t al f or t he Gover nment . The f ol l owi ng shal l be submi t t ed i n accor dance wi t h Sect i on

01 33 00 SUBMI TTAL PROCEDURES:

SD- 01 Pr econst r uct i on Submi t t al s

Addi t i onal Pr oper t y Agr eement s; G- RED.

Copi es of any agr eement s f or Cont r act or - acqui r ed r eal est at e r i ght s f or t hi s pr oj ect shal l be f ur ni shed bef or e ent er i ng t her eon.

Cer t i f i ed Sur vey Resul t s

Fur ni sh a copy of cer t i f i ed r esul t s of sur veys whi ch ver i f y ar eas and l i mi t s of Cont r act or - acqui r ed r eal est at e r i ght s.

1. 2 REGULATORY REQUI REMENTS

1. 2. 1 Real Est at e Ri ght s

Ri ght s f or t he use of t he wor k and st or age ar eas have been obt ai ned and t he gener al l i mi t s of t he ar eas ar e shown on t he dr awi ngs. Copi es of i nst r ument s conveyi ng r i ght s f or use of t he wor k and st or age ar eas shown on t he dr awi ngs and speci f i ed her ei n ar e avai l abl e f or i nspect i on i n t he Engi neer i ng, Desi gn, & Const r uct i on Of f i ce, U. S. Ar my Cor ps of Engi neer s, Det r oi t Di st r i ct , 477 Mi chi gan Avenue, McNamar a Bui l di ng, Det r oi t , Mi chi gan. Conf or mance t o al l appl i cabl e r equi r ement s of t he i nst r ument s conveyi ng r i ght s i s r equi r ed. Two ( 2) copi es of each i nst r ument wi l l be f ur ni shed t o t he Cont r act or . No ot her r eal est at e r i ght s have been obt ai ned by t he Gover nment f or t hi s pr oj ect .

1. 2. 2 Addi t i onal Real Est at e Ri ght s

Any addi t i onal pr oper t y agr eement s and/ or r eal est at e r i ght s desi r ed by t he Cont r act or shal l be obt ai ned by t he Cont r act or at i t s own expense.

Such agr eement s shal l c l ear l y r el i eve t he Gover nment of any r esponsi bi l i t y f or damages or l i abi l i t y r esul t i ng f r om t he Cont r act or ' s use of such grounds.

SECTI ON 01 10 10 Page 2

1. 3 PROJECT/ SI TE CONDI TI ONS

1. 3. 1 Locat i on and Ver i f i cat i on

I t shal l be t he Cont r act or ' s r esponsi bi l i t y t o accur at el y l ocat e t he l i mi t s of al l l ands ut i l i zed under t he cont r act . The cor ner and angl e poi nt s of each ar ea f or whi ch r i ght s have been obt ai ned shal l be mar ked wi t h semi per manent mar ker s except wher e t her e i s an appr oved exi st i ng pr oper t y mar ker . Tempor ar y mar ker s shal l be pl aced at poi nt s on al i gnment . The poi nt s on al i gnment shal l be mar ked at st at i ons so t hat i nt er val s bet ween poi nt s do not exceed 200 f eet .

1. 3. 2 Sur vey Mar ker s

Al l mar ker s shal l be i nst al l ed i n an ar ea pr i or t o i t s use and t hey shal l be avai l abl e f or r ef er ence dur i ng and upon compl et i on of use of t he ar ea.

Wher e appr oved exi st i ng pr oper t y mar ker s ar e f ound, a wi t ness st ake, as speci f i ed i n Subpar agr aph, " Semi per manent Mar ker s" bel ow, shal l be pr ovi ded. I f t he t ypes of mar ker s speci f i ed her ei naf t er cannot be used, ot her t ypes, as appr oved by t he Cont r act i ng Of f i cer , shal l be pr ovi ded.

1. 3. 2. 1 Semi per manent Mar ker s

The mar ker s shal l be a st eel r od one- hal f i nch i n di amet er and f our ( 4) f eet l ong. The st eel r od shal l be dr i ven ver t i cal l y i nt o t he gr ound so t hat t he t op i s f l ush wi t h t he f i ni shed gr ound sur f ace. Each mar ker shal l be wi t nessed by a 2" x 2" yel l ow st ake ext endi ng t wo ( 2) f eet above t he gr ound sur f ace and dr i ven i nt o t he gr ound unt i l s t abl e, wi t h not l ess t han one ( 1) f oot penet r at i on.

1. 3. 2. 2 Tempor ar y Mar ker s

Mar ker s shal l be 2" x 2" , r ed- col or ed, wood hub st akes dr i ven i nt o t he gr ound unt i l s t abl e ( not l ess t han one ( 1) f oot penet r at i on) wi t h t wo ( 2) f eet pr oj ect i ng above t he gr ound sur f ace. I f t he per i od i n whi ch t empor ar y mar ker s ar e t o be i n pl ace exceeds one ( 1) const r uct i on season, a mor e per manent t ype of mar ker , as appr oved, shal l be pr ovi ded.

PART 2 PRODUCTS ( NOT APPLI CABLE)

PART 3 EXECUTI ON ( NOT APPLI CABLE)

- - End of Sect i on - -

SECTI ON 01 10 10 Page 3

DI VI SI ON 01 - GENERAL REQUI REMENTS

SECTI ON 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1. 1 RELATED DOCUMENTS

1. 2 PROJECT DESCRI PTI ON

1. 3 WORK COVERED BY CONTRACT DOCUMENTS

1. 4 WORK

1. 5 OTHER GENERAL REQUI REMENTS

1. 6 SUBMI TTALS

PART 2 PRODUCTS ( Not Used)

PART 3 EXECUTI ON

3. 1 HEALTH AND SAFETY

3. 2 PROTECTI ON OF PROPERTY AND OPERATI ONS

3. 3 CONTRACTOR' S USE OF PREMI SES

ATTACHMENTS:

Emer gency Act i on Pl an f or Sabi n Dam

Sabi n Dam Saf et y I nspect i on Repor t

- - End of Sect i on Tabl e of Cont ent s - -

SECTI ON 01 11 00 Page 1

SECTI ON 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1. 1 RELATED DOCUMENTS

A. Al l appl i cabl e r equi r ement s of ot her por t i ons of t he Cont r act Document s appl y t o t he Wor k of t hi s Sect i on, i ncl udi ng but not l i mi t ed t o Di vi s i on 1, Gener al Requi r ement s.

B. Def i ni t i on: COR - Cont r act i ng Of f i cer ' s Repr esent at i ve.

1. 2 PROJECT DESCRI PTI ON

A. SECTI ON I NTENT: Thi s sect i on i s i nt ended t o pr ovi de a summar y of t he pr oj ect and t he var i ous el ement s of wor k associ at ed wi t h i t . Thi s summar y shoul d be used i n conj unct i on wi t h ot her Speci f i cat i on sect i ons and t he const r uct i on Dr awi ngs. Thi s sect i on does not pr ovi de t he t echni cal det ai l f or par t i cul ar Wor k I t ems, but descr i bes t he wor k as a whol e, pr ovi di ng an over al l per spect i ve t o t he separ at e t asks and t hei r i nt er r el at i onshi ps.

B. GENERAL: The wor k t o be compl et ed consi st s of t wo maj or component s, and i ncl udes i nst al l at i on and mai nt enance of er osi on and sedi ment at i on cont r ol measur es f or each:

1. The br eachi ng, demol i t i on, and r emoval of t he Sabi n Dam Power house, spi l l way, and appur t enances. Lat est dam saf et y i nspect i on r epor t i s at t ached at t he end of t hi s sect i on and i s al so avai l abl e on t heboar dman. or g websi t e.

2. Rest or at i on of t he Boar dman Ri ver f or appr oxi mat el y 4, 000 l i near f eet f r om t he Beaver Pond ar ea j ust nor t h and east of Cass Road, t hr ough t he ext ent s of t he f or mer Sabi n i mpoundment , and appr oxi mat el y 500 f eet downst r eam of t he exi st i ng Sabi n Dam.

C. BREACHI NG, DEMOLI TI ON, AND DAM REMOVAL SUMMARY:

1. Br eachi ng, Demol i t i on, and Dam Removal gener al l y consi st s of :

a. Si t e c l ear i ng and i nst al l at i on of const r uct i on access dr i ves.

b. Coor di nat i on wi t h t he Cont r act i ng Of f i cer ' s Repr esent at i ve f or r emoval of power house equi pment and i nt ake gat e equi pment .

c. Demol i t i on of concr et e spi l l way t o el evat i on 609.

d. I ncr ement al demol i t i on of t he concr et e spi l l way t o r each a maxi mum dewat er i ng r at e of 1 f oot per day.

e. Const r uct sedi ment t r aps upst r eam of t he spi l l way i nl et as di r ect ed by t he COR and mai nt ai n t he t r aps by dai l y c l eani ng t hr oughout t he dewat er i ng oper at i on and f or t he dur at i on of const r uct i on, as appl i cabl e at each l ocat i on.

f . Once i mpoundment i s dr awn down bel ow power house i nl et el evat i on, i nst al l st op l ogs i n power house i nt ake t o l i mi t f l ow t o t he spi l l way.

g. Const r uct downst r eam f l ow di ver si on ber m bet ween spi l l way out l et and power house out l et channel .

h. Begi n f i l l and const r uct i on of t he pr oposed r i ver channel di r ect l y downst r eam of t he Power house and west of t he f l ow di ver si on ber m.

SECTI ON 01 11 00 Page 2 i . Once spi l l way i s demol i shed t o el evat i on 598. 5, st op demol i t i on and i nst al l bul k bag cof f er dam upst r eam of t he exi st i ng power house t o pr ot ect f ut ur e wor k at t he Power house.

j . Demol i t i on and r emoval of power house, subst r uct ur e, spi l l way, and r et ai ni ng wal l s.

k. Const r uct pr oposed r i ver channel t hr ough t he Power house i nt o t he Sabi n i mpoundment .

l . Once pr oposed r i ver channel i s f ul l y const r uct ed t hr ough t he power house, f i ni sh dewat er i ng by i ncr ement al l y l ower i ng t he bul k bag cofferdam.

m. Fi ni sh const r uct i on of pr oposed r i ver channel t hr ough cof f er dam ar ea connect i ng t he r i ver channel wi t hi n t he i mpoundment t o t he r i ver channel const r uct ed t hr ough t he power house.

n. Fi ni sh gr adi ng and seedi ng and r est or at i on of dam br eachi ng ar ea.

o. Af t er t he r i ver has been r out ed t hr ough t he r est or ed r i ver channel and t he spi l l way i s no l onger i n use, i ner t mat er i al s f r om demol i t i on act i v i t i es may be di sposed of onsi t e, i n f or mer spi l l way channel , accor di ng t o NREPA Par t 115 Sect i on 324. 11504 and Sect i on 324. 11507.

Di sposal s i t e shal l be capped wi t h 3 f eet of f i l l , t opsoi l and seed.

p. Sampl i ng of wi r i ng and r oof i ng mat er i al s f or asbest os, l ead based pai nt sur vey and an i nvent or y of bui l di ng component s t hat may cont ai n PCBs, mer cur y, chl or of l uor ocar bons, r ef r i ger ant s, and ot her pot ent i al l y hazar dous mat er i al s.

q. Al l hazar dous mat er i al shal l be di sposed of accor di ng t o l ocal , st at e and f eder al r egul at i ons.

r . Coor di nat i on wi t h ut i l i t y compani es f or r emoval power ser vi ce and wor k ar ound ut i l i t i es.

D. SEDI MENT MANAGEMENT AND RI VER RESTORATI ON SUMMARY:

1. A l ar ge deposi t of sedi ment has accumul at ed i n t he Sabi n Pond ( I mpoundment ) , as not ed on t he Dr awi ngs. The i nt ent i s t o excavat e a cor r i dor t hr ough t hi s sedi ment , wast i ng mat er i al i n adj acent di sposal ar eas as not ed, t o expose t he pr e- dam Boar dman Ri ver channel . The aver age channel di mensi ons ar e i ndi cat ed on t he Dr awi ngs.

Di mensi ons wi l l var y f r om t hi s aver age t o r e- const r uct nat ur al pool s and r i f f l es. Channel bank cut s l opes ar e 2H: 1V ( hor i zont al t o ver t i cal ) and spoi l pl acement ar eas ar e 3H: 1V ( hor i zont al t o ver t i cal ) unl ess st eeper nat i ve s l opes ar e encount er ed. Cut s l opes f r om f l oodpl ai n ext ent s t o exi st i ng gr ade ar e 3H: 1V ( hor i zont al t o ver t i cal unl ess st eeper nat i ves s l opes ar e encount er ed.

2. The sedi ment accumul at i on i n t he i mpoundment i s pr i mar i l y sand. Some f i ner mat er i al bet ween appr oxi mat el y St at i on 123+00 t o 121+00 ( t he dam embankment ) i s expect ed t o i ncl ude mor e f i ne mat er i al and wi l l be r eveal ed dur i ng dr awdown of t he pond.

3. As f i ni shed gr ades ar e r eached, i ndi cat or s such as t he gr avel bed of t he pr e- dam channel and st umps of t r ees al ong t he pr e- dam banks wi l l hel p gui de f i ne gr adi ng as t he ol d r i ver channel i s exposed.

Addi t i onal r est or at i on i ncl udes t he enhancement of pool and r i f f l e f eat ur es and t he addi t i on of l ar ge wood habi t at .

4. Sedi ment r emoval may occur under t he most ef f i c i ent means possi bl e, i ncl udi ng mechani cal , hydr aul i c, or ot her wi se. The cont r act or wi l l pr ovi de a det ai l ed submi t t al of t he means and met hods f or excavat i on and sequenci ng. The appr oach ut i l i zed must mi ni mi ze t he t r anspor t of sedi ment downst r eam of t he dam t o t he ext ent f easi bl e. Sedi ment t r aps wi l l be used t o col l ect mat er i al t hat wi l l mobi l i ze t hr ough t he wor k ar ea as an addi t i onal cont r ol t o mi ni mi ze sedi ment t r anspor t . Cont r ol l ed dr awdown of t he headpond wi l l al so be used t o mi ni mi ze sedi ment t r anspor t . Sedi ment t r ap i nst al l at i on and r egul ar mai nt enance, i ncl udi ng dai l y c l eani ng, SECTI ON 01 11 00 Page 3 shoul d be done i n conj unct i on wi t h t he dewat er i ng oper at i on f or t he most ef f ect i ve cont r ol of sedi ment t r anspor t . Some sedi ment i s expect ed t o mobi l i ze and be t r anspor t ed wi t hi n t he wor k ar ea and downst r eam of t he dam as par t of t he pr oj ect , however , t hi s shoul d and can be mi ni mi zed t hr ough r egul ar l y mai nt ai ni ng sedi ment t r aps and moni t or i ng sedi ment t r anspor t pr i or t o advanci ng t he dewat er i ng oper at i on. I f sand i s bei ng t r anspor t ed past t he sedi ment t r aps, dewat er i ng oper at i on shal l not advance.

1. 3 WORK COVERED BY CONTRACT DOCUMENTS

A. The f ol l owi ng per mi t s have been appl i ed f or :

1. Joi nt Per mi t Appl i cat i on f r om t he Mi chi gan Depar t ment of Envi r onment al Quality.

2. Nat ur al Ri ver s Per mi t f r om t he Mi chi gan Depar t ment of Nat ur al Resour ces

B. The r equi r ed Wor k f or t hi s cont r act i ncl udes:

1. Obt ai n per mi t s as f ol l ows:

a. Demol i t i on per mi t f r om t he Gr and Tr aver se Count y Const r uct i on Codes Depar t ment , and submi t a not i f i cat i on ( Not i ce of I nt ent t o Renovat e/ Demol i sh) t o MDEQ at l east 10 wor ki ng days pr i or t o t he demol i t i on dat e. Pr i or t o appl i cat i on f or t he demol i t i on per mi t a NESHAP ( 40CFR Par t 61, Subpar t M) must be compl et ed.

b. Soi l and Sedi ment at i on Cont r ol Per mi t ( Par t 91) f r om t he Gr and Tr aver se Count y Dr ai n Commi ssi oner .

b. Any ot her per mi t s t hat may be r equi r ed.

2. At exi st i ng i mpoundment el evat i on ( appr oxi mat el y 609. 0) set up al l cont r ol s onsi t e, i ncl udi ng er osi on and sedi ment at i on cont r ol s.

3. Sampl i ng and anal ysi s of power house wi r i ng and r oof i ng mat er i al s f or exi st ence of asbest os cont ai ni ng mat er i al ( ACM) . I dent i f y ot her pot ent i al hazar dous mat er i al f or abat ement . Pr evi ousl y i dent i f i ed i t ems i ncl ude; pot ent i al l ead based pai nt s, f l uor escent l i ght t ubes pot ent i al l y cont ai ni ng mer cur y, and pot ent i al PCB cont ai ni ng mat er i al i ncl udi ng caul k i ng, oi l , and el ect r i cal equi pment .

4. I ncr ement al l y demol i sh exi st i ng spi l l way as i ndi cat ed on t he Dr awi ngs and dewat er i mpoundment at a r at e of no gr eat er t han 1 f oot per day or as di ct at ed i n t he appr oved Joi nt Per mi t Appl i cat i on ( JPA) .

5. Compl et e pr el i mi nar y gr adi ng and sedi ment t r aps as shown on t he Dr awi ngs and as di r ect ed by t he COR.

6. I nst al l downst r eam f l ow di ver si on ber m and upst r eam bul k bag cof f er dam st r uct ur es as i ndi cat ed i n t he Dr awi ngs.

7. Dewat er i mpoundment ut i l i z i ng t he exi st i ng concr et e spi l l way as i ndi cat ed i n t he Dr awi ngs. Const r uct bul k bag cof f er dam upst r eam of t he powerhouse.

8. Any wor k r ef er r ed t o as " pr oposed" wi t hi n t he speci f i cat i ons package or Dr awi ngs shal l be consi der ed r equi r ed under t hi s cont r act .

C. The wor k of any one t r ade, Cont r act or or Subcont r act or shal l not be l i mi t ed t o t he wor k l i s t ed i n a Sect i on under " Pr oj ect Descr i pt i on" . Such l i st i ngs ar e i nt ended as gener al gui des t o t he cont ent s of a Sect i on, and not as a scope of t he wor k. Unl ess ot her wi se i ndi cat ed, pr ovi de and pay f or al l l abor , mat er i al s, equi pment , t ool s, const r uct i on equi pment and machi ner y, wat er , heat , ut i l i t i es, t r anspor t at i on, t est equi pment , t est i ng and ot her f aci l i t i es and ser vi ces necessar y f or t he pr oper execut i on and compl et i on of t he wor k, whet her t empor ar y or per manent , and whet her or not i ncor por at ed or t o be i ncor por at ed i n t he wor k.

SECTI ON 01 11 00 Page 4

1. 4 WORK

A. SEQUENCE

General

1. The wor k shal l be pl anned, schedul ed, and per f or med i n st ages i n or der t o compl et e t he Wor k wi t hi n t he r equi r ement s of t he Speci f i cat i ons and Dr awi ngs and t he r equi r ement s of appr opr i at e r egul at or y agenci es and permits.

2. The sequence shal l be i n t he gener al sequence descr i bed by Dr awi ng T-1.2.

1. 5 OTHER GENERAL REQUI REMENTS

A. Compl y wi t h al l pr oj ect per mi t s and appl y/ obt ai n al l Cont r act or r esponsi bl e per mi t s pr i or t o t he commencement of wor k.

B. Make ar r angement s f or t empor ar y st or age of mat er i al s and suppl i es and f or t i mel y del i ver y t o t he pr oj ect s i t e.

C. Assi st t he Cont r act i ng Of f i cer ' s Repr esent at i ve as r equi r ed i n t he r evi ew of const r uct i on.

D. Mai nt ai n up- t o- dat e r ecor ds on- si t e.

E. Mai nt ai n t he Li mi t s of Wor k i n a neat condi t i on.

1. 6 SUBMITTALS

A. The Cont r act or shal l submi t schedul es of wor k, saf et y pl ans, dr awi ngs and sequenci ng det ai l s, sedi ment management pl ans at each change i n phase of wor k, t est r epor t s, l ab dat a, and ot her s t o t he Cont r act i ng Of f i cer ' s Repr esent at i ve i n accor dance wi t h Sect i on 01 33 00. The Submi t t al Regi st er at t he end of Sect i on 01 33 00 l i s t s t he speci f i c submi t t al s required.

PART 2 PRODUCTS ( Not Used)

PART 3 EXECUTI ON

3. 1 HEALTH AND SAFETY

A. The cont r act or i s r esponsi bl e f or under st andi ng and bei ng pr epar ed t o f ol l ow and f ul l y i mpl ement t he " USACE Manual No. 385- 1- 1 dat ed 30 November 2014" . I n addi t i on, i t wi l l be r equi r ed t hat any f ul l - t i me super i nt endent mai nt ai n a copy of t hi s pl an at al l t i mes on si t e, and per f or m at l east one ( 1) emer gency r esponse dr i l l i n cooper at i on wi t h t he Count y Emer gency Management Coor di nat or dur i ng t he f i r st week of const r uct i on.

B. The cont r act or i s r esponsi bl e f or under st andi ng and bei ng pr epar ed t o f ol l ow and f ul l y i mpl ement t he " Emer gency Act i on Pl an f or Sabi n Dam" dat ed November 2015 as i ncl uded i n t hese speci f i cat i ons.

I n addi t i on, i t wi l l be r equi r ed t hat any f ul l - t i me super i nt endent mai nt ai n a copy of t hi s pl an at al l t i mes on si t e, and per f or m at l east one ( 1) emer gency r esponse dr i l l i n cooper at i on wi t h t he Count y Emer gency Management Coor di nat or dur i ng t he f i r st week of const r uct i on. Dur i ng const r uct i on, t he cont r act or must mai nt ai n an adequat e l evel of pr epar edness, as det er mi ned by t he Count y Emer gency Management Coor di nat or , f or an unexpect ed dam br each.

SECTI ON 01 11 00 Page 5

3. 2 PROTECTI ON OF PROPERTY AND OPERATI ONS

A. The pr oj ect wi l l occur wi t hi n t he Count y Nat ur al Educat i on Reser ve pr oper t y. Resi dences ar e i n c l ose pr oxi mi t y al ong t he east edge of t he i mpoundment . I mpact s t o adj acent pr oper t y owner s shal l be mi ni mi zed. The Boar dman Ri ver i s a heavi l y ut i l i zed r ecr eat i onal r i ver wi t h wat er cr af t and f i sher man movi ng t hr ough t he r i ver . Si gnage wi l l be i n- pl ace not i f y i ng user s of t he pr oj ect , but t he Cont r act or i s not i f i ed of t he pot ent i al f or t he gener al publ i c t o ent er t he wor k ar ea t hr ough t he r i ver cor r i dor .

B. The Cont r act or shal l ut i l i ze ever y pr ecaut i on t o pr ot ect t he pr oper t y f r om damage dur i ng execut i on of t he Wor k. Any damage t hat t he Cont r act or may i nf l i c t shal l be r epai r ed or r epl aced i n a pr ompt manner as di r ect ed by t he Cont r act i ng Of f i cer ' s Repr esent at i ve ( COR) at no addi t i onal cost t o t he USACE.

C. The Cont r act or shal l ut i l i ze ever y pr ecaut i on t o pr ot ect t he r emai ni ng dam equi pment f r om damage dur i ng demol i t i on of t he dam st r uct ur e. Any damage t hat t he Cont r act or may i nf l i c t shal l be t he r esponsi bi l i t y of t he cont r act or , r epai r ed or r epl aced i n a pr ompt manner as di r ect ed by t he Cont r act i ng Of f i cer ' s Repr esent at i ve at no addi t i onal cost t o t he

USACE.

D. The Cont r act or shal l t ake al l measur es r equi r ed t o mi ni mi ze adver se i mpact s f r om execut i on of t he wor k on pr oper t y abut t er s and shal l not i nt er f er e wi t h t hei r oper at i ons.

E. The Cont r act or shal l coor di nat e s i t e r est r i ct i ons and vehi cul ar / pedest r i an t r af f i c cont r ol pl ans as appr opr i at e.

3. 3 CONTRACTOR' S USE OF PREMI SES

A. Conf i ne oper at i ons at t he s i t e t o ar eas per mi t t ed by l aw, or di nances, per mi t s and t he Cont r act Document s and do not unr easonabl y encumber t he Si t e wi t h any mat er i al s or equi pment . The Cont r act or shal l use onl y t hose desi gnat ed ar eas of t he Si t e f or st agi ng and st or age.

St agi ng and st or age ar eas ar e t o be agr eed upon and accept ed by t he Cont r act i ng Of f i cer ' s Repr esent at i ve.

B. The Cont r act or shal l assume f ul l r esponsi bi l i t y f or t he pr ot ect i on and saf e keepi ng of pr oduct s and equi pment under t hi s Cont r act t hat ar e st or ed on- si t e dur i ng t he pr oj ect const r uct i on.

C. At al l t i mes, pr ovi de t he Cont r act i ng Of f i cer ' s Repr esent at i ve easy and saf e access t o t he wor k wher ever i t i s i n pr epar at i on and pr ogr ess.

Pr ovi de such access so COR may per f or m hi s f unct i ons.

Attachments:

Emer gency Act i on Pl an f or Sabi n Dam Sabi n Dam Saf et y I nspect i on Repor t

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SECTI ON 01 11 00 Page 6

DAM SAFETY INSPECTION REPORT

SABIN DAM

DAM ID NO. 513

BOARDMAN RIVER

GRAND TRAVERSE COUNTY

SECTION 27, T27N, R11W

OWNER: Grand Traverse County 400 Boardman Avenue Traverse City, Michigan 49684-2577 231-946-0921

OPERATOR: Grand Traverse County Department of Public Works 2650 LaFranier Road Traverse City, Michigan 49684

HAZARD POTENTIAL

CLASSIFICATION: High

INSPECTION DATE: August 20, 2015

REPORT DATE: September 9, 2015

INSPECTED AND PREPARED BY:

James T. Pawloski, P.E.

Dam Safety Program Water Resources Division Department of Environmental Quality 2100 M-32 West Gaylord, Michigan 49735 989-370-1528

INTRODUCTION

The purpose of this inspection report was to evaluate the structural condition and hydraulic capacity of the Sabin Dam as required by Part 315, Dam Safety (Part 315), of the Natural Resources and Environmental Protection Act, 1994 PA 451, as amended (NREPA). This inspection was conducted in response to a request from the dam’s owner, Grand Traverse County. The report is limited to a discussion of observations based on a visual investigation and review of any available previous inspection reports, plans, and data. This report should not be considered an in-depth engineering investigation.

All references to “right” and “left” in this report are based on the observer facing downstream.

CONCLUSIONS AND RECOMMENDATIONS

The Sabin Dam is in satisfactory condition. Conditions at the Sabin Dam have changed very little since the inspection in 2012; therefore, much of the language in this report may be similar or identical to the previous report.

There were no deficiencies observed during the inspection that would lead to the dam’s immediate failure. The dam has adequate spillway capacity under existing conditions.

The following recommended actions should be completed by the dates indicated:

1. Update the existing Emergency Action Plan (EAP) to reflect changes in ownership and any other essential activities in the EAP. Continue to annually review the EAP with the Emergency Services Coordinator for Grand Traverse County and update it as appropriate. In accordance with Part 315, provide a copy of the findings of the EAP review and any plan updates to the Dam Safety Program and the County Emergency Management Coordinator by December 31, 2015.

2. Remove trees and brush from the embankment by December 31, 2015.

The current high hazard rating is appropriate.

PROJECT INFORMATION

The Sabin Dam consists of a 60-foot long left embankment, a 64-foot wide powerhouse, a 52-foot long center embankment, a 32-foot long stop log spillway section, a tainter gate spillway, and a 330-foot long right embankment. The impoundment is approximately 40 acres in surface area at normal water levels.

The embankments are all constructed of sand fill. All structures are founded on sand, gravel, and clay glacial deposits. The right embankment has a maximum height of approximately 20 feet. Between 1985 and 1988, the embankments were raised approximately one foot in elevation.

The stop log section of the spillway has two feet of stop logs above the spillway crest.

There are three low-flow outlets with wood lift gates in the stop log section that are no longer utilized. The tainter gate section contains one 18-foot wide by 5.5-foot high steel tainter gate. The gate is operated with a fixed electric cable hoist. An agitator system (aerators) is in place upstream of the tainter gate to prevent ice buildup during the winter season.

The powerhouse is a reinforced concrete substructure with a brick superstructure and contains one power generating unit. The intake structure is integral to the powerhouse and contains the water flow, which discharges directly to the Boardman River just downstream from the powerhouse.

The 2005 Supporting Technical Information Document, authored by Gannett Fleming, Incorporated, which was prepared as a part of the Potential Failure Modes Analysis required by the Federal Energy Regulatory Commission, was used as the primary reference for this report.

Boardman River Dams Committee

From 2005 through 2009, a local coalition of interested parties called the Boardman River Dams Committee (BRDC) studied the Brown Bridge, Boardman, Sabin, and Union Street Dams on the Boardman River to determine what the eventual fate of the dams should be. The Brown Bridge, Boardman, and Sabin Dams had been power-producing dams, but power production was discontinued by Traverse City Light and Power, operator of the dams. When power production ceased, the owner requested, and was granted, the surrender of their license issued by the Federal Energy Regulatory Commission, and they were no longer exempted from regulation by state dam safety regulations.

The BRDC entered a split recommendation: either remove the three power-producing dams, or continue to study them further to reenergize them. They also recommended maintaining and modifying the Union Street Dam. The owners of the dams, the City of Traverse City (Brown Bridge and Union Street) and Grand Traverse County (Boardman and Sabin) each resolved to remove the dams, with the exception of Union Street. The BRDC continues to be involved with this process and is preparing to retain design and construction professionals to implement the removal decisions made by the community.

In 2011, the Sabin Pond was drawn down approximately six feet in preparation for eventual removal of the dam.

SITE INVESTIGATION

The following discussion of the dam’s physical condition and appurtenances is based on observations and photographs obtained on the date of the inspection.

The embankments are in good condition, as shown in the attached photographs. There were no indications of settlement, sinkholes, or other deficiencies in the embankments.

There is some light brush and small trees beginning to encroach on the embankment.

These should all be removed by December 31, 2015, and as it develops. The embankment should be maintained in a grass-covered condition.

The stop log section of the spillway is in fair condition, as shown in Photographs 7 and

8. There is significant concrete spalling. The spalling should normally be addressed, due to a loss of the concrete section and structural integrity. However, since the decision has been made to remove the dam in the near future and the impoundment has been drawn down, it is not necessary to implement minor repairs on the structure at this time. If a decision were made to re-impound the water, then corrective action would be necessary.

The overflow spillway is in good condition, as shown in Photographs 6 and 9. The tainter gate was fully open on the date of the inspection and is in good condition. The concrete surfaces of the spillway chute are all in good condition.

The powerhouse intake structure is in good condition, as shown in Photographs 3 and

4. The trash racks are functional.

The powerhouse also appears to be in good condition overall, as shown in Photographs 2, 3, and 11. Some minor spalling is evident on the downstream face of the powerhouse. However, since the dam is scheduled for removal and the spalling is limited, no action is necessary at this time.

STRUCTURAL STABILITY

Based on the conditions observed during the field inspection, the dam appears to be stable. No further structural stability analysis is warranted at this time.

HYDRAULICS AND HYDROLOGY

The total drainage area of the Boardman River at the dam is 268 square miles, and the contributing drainage area is 211 square miles. The design discharge for this dam is the one-half percent flood discharge, which is estimated to be 1,900 cubic feet per second (cfs).

The existing spillway capacity is estimated to be approximately 3,600 cfs, with no freeboard. Therefore, the dam has adequate spillway capacity. Spillway calculations are included in a Mead & Hunt report, 1991 Spillway Design Flood Studies.

OPERATION AND MAINTENANCE

Grand Traverse County Department of Public Works operates and maintains the dam.

A written Operations and Maintenance Plan is on file.

EMERGENCY ACTION PLAN

Since this dam has a high hazard potential rating, an EAP is required. An EAP is on file with the Dam Safety Program, but it was prepared by Traverse City Light and Power and reflects their organization and operation. The EAP should be updated by Grand Traverse County personnel and reflect the change in ownership and any other activities contained in the EAP. The EAP should be reviewed and updated annually.

In accordance with Part 315, Grand Traverse County must provide a copy of the findings of the EAP review and any plan updates to the Dam Safety Program and County Emergency Management Coordinator by December 31, 2015.

APPENDICES

A location map and inspection photographs are included with this report.

Sabin Dam

Photograph 1 – Powerhouse access road and left embankment.

Photograph 2 – Powerhouse viewed from the left abutment.

Photograph 3 – Powerhouse intake and spillway entrance.

Photograph 4 – Closer view of the powerhouse intake.

Photograph 5 – Spillway walkway.

Photograph 6 – Spillway stop log section entrance.

Photograph 7 – Downstream face of the spillway stop log section.

Photograph 8 – Downstream face of the spillway stop log section.

Photograph 9 – Spillway viewed from the deck.

Photograph 10 – Powerhouse viewed from downstream.

Photograph 11 – Left downstream training wall.

Photograph 12 – Right downstream training wall.

Photograph 13 – Right embankment viewed from the right abutment.

Photograph 14 – Downstream face of the right embankment – original spillway foundation.

DI VI SI ON 01 - GENERAL REQUI REMENTS

SECTI ON 01 29 01

MEASUREMENT AND PAYMENT

08/15

PART 1 GENERAL

1. 1 SI NGLE JOB PAYMENT I TEMS

1. 2 UNI T PRI CE PAYMENT I TEMS

PART 2 MEASUREMENTS AND MATERI ALS

2. 1 GENERAL

2. 2 BI D I TEM DI VI SI ON 1 - SABI N DAM BREACHI NG AND DEMOLI TI ON

2. 3 BI D I TEM DI VI SI ON 2 - RI VER RESTORATI ON

2. 4 BI D I TEM DI VI SI ON 3 - OPTI ONS

2. 5 BI D I TEM DI VI SI ON 4 - I NCI DENTALS

PART 3 EXECUTI ON ( NOT USED)

- - End of Sect i on Tabl e of Cont ent s - -

SECTI ON 01 29 01 Page 1

SECTI ON 01 29 01

MEASUREMENT AND PAYMENT

08/15

PART 1 GENERAL

1. 1 SI NGLE JOB PAYMENT I TEMS

Payment i t ems f or t he wor k of t hi s cont r act f or whi ch cont r act j ob payment s wi l l be made ar e l i s t ed i n t he BI DDI NG SCHEDULE and descr i bed bel ow. Al l cost s f or i t ems of wor k, whi ch ar e not speci f i cal l y ment i oned t o be i ncl uded i n a par t i cul ar j ob or uni t pr i ce payment i t em, ar e i ncl uded i n t he l i s t ed j ob i t em most c l osel y associ at ed wi t h t he wor k i nvol ved. The j ob pr i ce and payment made f or each i t em l i st ed const i t ut es f ul l compensat i on f or f ur ni shi ng al l pl ant , l abor , mat er i al s, and equi pment , and per f or mi ng any associ at ed Cont r act or qual i t y cont r ol , envi r onment al pr ot ect i on, meet i ng saf et y r equi r ement s, t est s and r epor t s, and f or per f or mi ng al l wor k r equi r ed f or whi ch separ at e payment i s not ot her wi se pr ovi ded.

1. 2 UNI T PRI CE PAYMENT I TEMS

Payment i t ems f or t he wor k of t hi s cont r act on whi ch t he cont r act uni t pr i ce payment s wi l l be made ar e l i s t ed i n t he BI DDI NG SCHEDULE and descr i bed bel ow. The uni t pr i ce and payment made f or each i t em l i st ed const i t ut es f ul l compensat i on f or f ur ni shi ng al l pl ant , l abor , mat er i al s, and equi pment , and per f or mi ng any associ at ed Cont r act or qual i t y cont r ol , envi r onment al pr ot ect i on, meet i ng saf et y r equi r ement s, t est s and r epor t s, and f or per f or mi ng al l wor k r equi r ed f or each of t he uni t pr i ce i t ems.

PART 2 MEASUREMENTS AND MATERI ALS

2. 1 GENERAL

A. The pay i t ems l i s t ed bel ow descr i be t he measur ement of and payment f or t he Wor k t o be done under t he r espect i ve i t ems l i s t ed on t he Bi d Schedul e. The component s of Wor k i ncl ude speci al t y i t ems i nvol v i ng:

1. Sabi n Dam Br eachi ng and Demol i t i on.

a. Si t e Cl ear i ng and Reuse

b. Spi l l way Demol i t i on and Removal

c. Ear t h Fi l l - Downst r eam Fl ow Di ver si on Ber m

d. Woven Geot ext i l e - Downst r eam Fl ow Di ver si on Ber m

e. Ri p Rap - Downst r eam Fl ow Di ver si on Ber m f . Power house Super st r uct ur e and Appur t enances Demol i t i on

g. Tempor ar y Bul k Bag Cof f er dam

h. Ear t hwor k - Ri ver Access and St or mwat er Basi n I . Er osi on Cont r ol

2. Ri ver Rest or at i on

a. I mpoundment and Dam Embankment Excavat i on

b. Ear t hwor k - Downst r eam Tr ansi t i on Excavat i on & Subgr ade Fi l l ( f r om

Sabi n Dam t o downst r eam l i mi t )

c. Ear t hwor k - Downst r eam Fl oodpl ai n Fi l l ( St at i on 121+70 t o 115+75)

d. I nst al l and Mai nt ai n Sedi ment Tr aps

e. Seed ( f l oodpl ai n mi x) Fl oodpl ai n Cor r i dor f . Seed ( Upl and mi x) Spoi l s and al l ot her Ar eas wi t hi n t he l i mi t s of

SECTI ON 01 29 01 Page 2 disturbance

g. I n- Channel Di g and Pi t ch ( Oper at or and Excavat or )

h. Channel Bed Const r uct i on ( St at i on 121+70 t o 115+75) I . FES Bank Const r uct i on J. Lar ge Wood Logs ( Lar ge wood l ogs shown on dr awi ngs t hr oughout pr oj ect ext ent ) K. Lar ge Wood Pi l es ( Lar ge wood pi l es shown on dr awi ngs t hr oughout pr oj ect ext ent ) L. Lar ge Wood Logs wi t h Root wads ( Lar ge wood l ogs wi t h Root wads shown on dr awi ngs t hr oughout pr oj ect ext ent ) M. Veget at i on sal vage and i nst al l at i on N. Tr ees and Shr ubs ( pot t ed st ock) O. Tr ees and Shr ubs ( bar e r oot st ock) P. Tr ees and Shr ubs ( l i ve st akes)

3. Opt i ons

a. Lar ge Wood Logs ( r est or ed channel )

b. Lar ge Wood Pi l es ( r est or ed channel )

c. Lar ge Wood Logs wi t h Root wads ( r est or ed channel )

d. Topsoi l Spoi l s and adj acent upl and ar eas

e. FES Bank Const r uct i on ( r est or ed channel ) f . Fabr i c Sl ope Pr ot ect i on ( r est or ed channel ) G. Channel Bed Const r uct i on ( Upst r eam Tr ansi t i on) H. Ear t hwor k - Suppl ement al East Tr i but ar y Gr adi ng I . Habi t at Boul der s ( St at i ons 121+70 t o 115+75)

4. I nci dent al s

a. Mobi l i zat i on

b. Haul Roads

c. Si gnage

B. Each uni t or Job pr i ce st at ed i n t he Bi d shal l const i t ut e f ul l compensat i on, as her ei n speci f i ed, f or each i t em of t he Wor k compl et ed.

2. 2 BI D I TEM DI VI SI ON 1 - SABI N DAM BREACHI NG AND DEMOLI TI ON

A. Si t e Cl ear i ng and Reuse

1. Bi d I t em Di vi s i on 1, I t em 1 shal l be pai d f or at t he Cont r act Job Pr i ce f or s i t e c l ear i ng and r euse of t r ees and veget at i on.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or t he c l ear i ng of t r ees and veget at i on and t hei r r euse wi t hi n t he Pr oj ect Li mi t s of Di st ur bance. Pr ot ect t r ees as i ndi cat ed on Dr awi ngs. No t r ees wi t hi n t he c l ear i ng ar ea ar e ant i c i pat ed t o meet t he cr i t er i a f or i n st r eam l ar ge wood.

3. Job Pr i ce shal l i ncl ude est i mat ed Dr awi ng quant i t y of 1 AC. I nt er i m payment s wi l l be based on per cent age compl et ed. Engi neer s est i mat e, 1 AC of ar ea ( pl an quant i t y) f or i nf or mat i on onl y. Cont r act or t o ver i f y quantities.

B. Spi l l way Demol i t i on and Removal

1. Bi d I t em Di vi s i on 1, I t em 2 shal l be pai d f or at t he Cont r act Job pr i ce f or concr et e and sheet pi l e r emoved f r om t he Sabi n Dam spi l l way.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or r emoval of t he concr et e and sheet pi l e wal l desi gnat ed i n t he Dr awi ngs.

3. Job pr i ce shal l i ncl ude est i mat ed quant i t y of 500 CY of mat er i al and

400 SF of deck. Engi neer s est i mat e, 500 CY of mat er i al and 400 SF of deck ( pl an quant i t y) f or i nf or mat i on onl y. Cont r act or t o ver i f y quantities.

C. Ear t h Fi l l - Downst r eam Fl ow Di ver si on Ber m

1. Bi d I t em Di vi s i on 1, I t em 3 shal l be pai d f or at t he Cont r act Job

SECTI ON 01 29 01 Page 3 pr i ce f or ear t h f i l l pl aced t o const r uct t he downst r eam f l ow di ver si on berm.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or pl acement of ear t h f i l l desi gnat ed i n t he Dr awi ngs f or t he downst r eam f l ow di ver si on ber m.

3. Job pr i ce shal l i ncl ude est i mat ed quant i t y of 1, 500 CY. Engi neer s est i mat e, 1, 500 CY of mat er i al ( pl an quant i t y) f or i nf or mat i on onl y.

Cont r act or t o ver i f y quant i t i es.

D. Woven Geot ext i l e - Downst r eam Fl ow Di ver si on Ber m

1. Bi d I t em Di vi s i on 1, I t em 4 shal l be pai d f or at t he Cont r act uni t pr i ce per squar e yar d of woven geot ext i l e pl aced i n t he downst r eam f l ow di ver si on ber m.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or pl acement of woven geot ext i l e desi gnat ed i n t he Dr awi ngs of t he downst r eam f l ow di ver si on ber m. Pl acement of geot ext i l e shal l onl y occur af t er base mat er i al s have been pl aced and si t e has been pr epar ed.

3. Payment shal l be made based on Gover nment Repr esent at i ve measur ement s of squar e yar ds of i nst al l ed mat er i al .

E. Ri p Rap - Downst r eam Fl ow Di ver si on Ber m

1. Bi d I t em Di vi s i on 1, I t em 5 shal l be pai d f or at t he Cont r act uni t pr i ce per t on of r i p r ap pl aced on t he downst r eam f l ow di ver si on ber m.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or pl acement of r i p r ap desi gnat ed i n t he Dr awi ngs of t he downst r eam f l ow di ver si on ber m. Pl acement of r i p r ap shal l onl y occur af t er base mat er i al s have been pl aced and si t e has been pr epar ed.

3. Payment shal l be made based on Gover nment Repr esent at i ve measur ement s of i nst al l ed mat er i al .

F. Power house Super st r uct ur e and Appur t enances Demol i t i on

1. Bi d I t em Di vi s i on 1, I t em 6 shal l be pai d f or at t he Cont r act Job price.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y t o demol i sh and di spose of concr et e on- si t e t he exi st i ng Power house bui l di ng i ncl udi ng, but not l i mi t ed t o t he f ol l owi ng:

a. Super st r uct ur e.

b. Gener at or Fl oor .

c. Wal l s.

d. Scr ol l Case.

e. Dr af t Tube.

f . Base Sl ab.

g. Downst r eam Ret ai ni ng Wal l s

h. Wi ng Wal l s i . Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y t o compl et e hazar dous mat er i al s t est i ng on any suspect ed hazar dous mat er i al s cont ai ned wi t hi n t he power house i n accor dance t o al l envi r onment al and di sposal r egul at i ons.

j . Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y t o compl et el y and pr oper l y di spose of hazar dous mat er i al s of f - s i t e.

k. Di sposal of non- hazar dous mat er i al s on- si t e t o i ncl ude up t o 5 hi ber nacul um as det ai l ed i n t he Dr awi ngs. Locat i ons t o be det er mi ned by COR.

3. Job Pr i ce shal l i ncl ude est i mat ed quant i t y of 1, 350 CY of mat er i al and 39, 000 CFT of super st r uct ur e. Engi neer s est i mat e of mat er i al s ( pl an quant i t y) f or i nf or mat i on onl y. Cont r act or t o ver i f y quant i t i es.

Al so i ncl ude accommodat i on of t wo weeks of t i me t o al l ow The count y, t he t hi r d par t y owner or t hei r r epr esent at i ve t o r emove al l exi st i ng

SECTI ON 01 29 01 Page 4 power house equi pment .

G. Tempor ar y Bul k Bag Cof f er dam

1. Bi d I t em Di vi s i on 1, I t em 7 shal l be pai d f or at t he Cont r act Job price.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or i nst al l at i on and r emoval of t he t empor ar y bul k bag cof f er dam as i ndi cat ed on t he Dr awi ngs. Mat er i al s i ncl ude aggr egat e base l ayer , non- woven geot ext i l e separ at or , i mper meabl e l i ner , r i pr ap ar mor i ng, and bul k bags.

3. Job pr i ce shal l i ncl ude est i mat ed 100 LF of bul k bag cof f er dam.

Engi neer s est i mat e, 100 LF of st r uct ur e ( pl an quant i t y) f or i nf or mat i on onl y. Cont r act or t o ver i f y quant i t i es.

H. Ear t hwor k - Ri ver Access and St or mwat er Basi n

1. Bi d I t em Di vi s i on 1, I t em 8 shal l be pai d f or at t he Cont r act uni t pr i ce per cubi c yar d of soi l moved.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y t o const r uct t he r i ver access r oad and st or mwat er basi n and t r enches on t he west embankment as shown on t he Dr awi ngs.

3. Job pr i ce shal l i ncl ude known Dr awi ng quant i t y 110 CY. I nt er i m payment s wi l l be based on per cent age compl et ed. Engi neer s est i mat e, 110 CY of mat er i al ( pl an quant i t y) f or i nf or mat i on onl y. Cont r act or t o ver i f y quant i t i es.

I . Er osi on Cont r ol

1. Bi d I t em Di vi s i on 1, I t em 9 shal l be pai d f or at t he Cont r act Job pr i ce f or er osi on cont r ol measur es i mpl ement ed at t he Pr oj ect s i t e.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y t o compl et el y and pr oper l y i nst al l soi l er osi on cont r ol measur es such as s i l t f enci ng, t ur f r ei nf or cement mat s, r i p r ap, and check dams i n accor dance wi t h t he Speci f i cat i on and Dr awi ngs.

3. Payment shal l be made based on per cent age compl et ed.

2. 3 BI D I TEM DI VI SI ON 2 - RI VER RESTORATI ON

A. I mpoundment and Dam Embankment Excavat i on

1. Bi d I t em Di vi s i on 2, I t em 1 shal l be pai d f or at t he Cont r act Job pr i ce f or sedi ment , soi l , or ot her mat er i al s excavat ed or r emoved f r om t he new st r eam channel and f l oodpl ai n, l oaded, haul ed and di sposed i n t he desi gnat ed spoi l s ar eas or as ot her wi se i ndi cat ed.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or excavat i on. Excavat i on wi l l pr i mar i l y be per f or med i n t he wet .

Excavat ed mat er i al s shal l be pl aced wi t hi n t he spoi l s ar eas shown on t he Dr awi ngs.

3. Payment shal l be made based on t he t ot al est i mat ed desi gn quant i t y of 102, 625 CY, whi ch i s based on compar i son of t he exi st i ng t opogr aphy and desi gn t opogr aphy f or r i ver and f l oodpl ai n shown on t he Dr awi ngs.

No measur ement wi l l be made f or t hi s i t em. Engi neer s est i mat e of mat er i al ( pl an quant i t y) f or i nf or mat i on onl y. Cont r act or t o ver i f y quant i t i es by pr ovi di ng a pr i or sur vey of i mpoundment and spoi l s l ocat i ons and a sur vey of spoi l s l ocat i ons once excavat i ons ar e completed.

B. Ear t hwor k - Downst r eam Tr ansi t i on Excavat i on & Subgr ade Fi l l ( f r om Sabi n Dam t o downst r eam l i mi t )

1. Bi d I t em Di vi s i on 2, I t em 2 shal l be pai d f or at t he Cont r act Job pr i ce f or sedi ment , soi l , or ot her mat er i al s f or t he excavat i on and

SECTI ON 01 29 01 Page 5 f i l l as r equi r ed t o devel op t he subgr ade f or t he const r uct ed channel and t he new f l oodpl ai n t hr ough and downst r eam of t he Sabi n Power house ( St at i on 121+70 t o 115+75) .

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or excavat i on and f i l l r equi r ed t o devel op t he subgr ade f or t he downst r eam t r ansi t i on of t he r est or ed r i ver channel and f l oodpl ai n.

Excavat i ons and f i l l wi l l pr i mar i l y be per f or med i n t he wet . Any excavat ed mat er i al s not sui t abl e f or r euse and not ut i l i zed f or desi gn shal l be pl aced wi t hi n t he spoi l s ar eas shown on t he Dr awi ngs.

3. Job pr i ce shal l i ncl ude est i mat ed 3, 750 CY of mat er i al , based on est i mat e of f i l l bet ween exi st i ng and desi gn subgr ade sur f aces.

Engi neer s est i mat e, 3, 750 CY of mat er i al ( pl an quant i t y) f or i nf or mat i on onl y. Cont r act or t o ver i f y quant i t i es.

C. Ear t hwor k - Downst r eam Fl oodpl ai n Fi l l ( St at i on 121+70 t o 115+75)

1. Bi d I t em Di vi s i on 2, I t em 3 shal l be pai d f or at t he Cont r act uni t pr i ce per sur f ace squar e yar d of t he const r uct ed f l oodpl ai n f i l l at l ocat i on i ndi cat ed t hat conf or ms wi t h t he det ai l s of t he Dr awi ngs and Speci f i cat i ons, compl et e and i n pl ace.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or excavat i on and f i l l r equi r ed t o devel op t he downst r eam f l oodpl ai n.

Any excavat ed mat er i al s shal l be pl aced wi t hi n t he spoi l s ar eas shown on t he Dr awi ngs.

3. Payment shal l be made based on measur ement of f i ni shed f l oodpl ai n f i l l sur f ace ar ea by Gover nment Repr esent at i ve.

D. I nst al l and Mai nt ai n Sedi ment Tr aps

1. Bi d I t em Di vi s i on 4, I t em 4 shal l be pai d f or at t he Cont r act Job pr i ce f or sedi ment t r ap const r uct i on and mai nt enance.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or const r uct i on, excavat i on, and mai nt enance of sedi ment t r aps wi t hi n t he Boar dman Ri ver as i ndi cat ed on t he Dr awi ngs and as di r ect ed by t he COR.

Thi s i t em shal l i ncl ude mai nt ai ni ng t he sedi ment t r aps as r equi r ed t o conduct t he r i ver channel r est or at i on and mi ni mi ze sedi ment mi gr at i on downst r eam dur i ng dewat er i ng oper at i ons. Excavat ed sedi ment shal l be pl aced i n spoi l s ar eas.

3. Job pr i ce shal l i ncl ude an est i mat ed 4- 6 sedi ment t r aps r equi r ed f or t he pr oj ect .

E. Seed ( f l oodpl ai n mi x) Fl oodpl ai n Cor r i dor

1. Bi d I t em Di vi s i on 2, I t em 5 shal l be pai d f or at t he Cont r act uni t pr i ce per acr e.

2. Pr ovi de al l l abor , mat er i al s, equi pment , and i nci dent al s necessar y f or seedi ng and mul chi ng of excavat ed or const r uct ed f l oodpl ai n as shown on t he Dr awi ngs.