Revised Specs.pdf

Mai nt enance Dr edgi ng, Nar r aguagus Ri ver , Mi l br i dge, Mai ne Amendment 0001

DOCUMENT 00 00 01

AMENDMENT 0001 OF SOLI CI TATI ON

PART 1 GENERAL

1. 1 CHANGES TO SPECI FI CATI ONS

1. 1. 1 Revi sed Sect i ons

The speci f i cat i on sect i ons l i s t ed bel ow ar e del et ed and ar e r epl aced wi t h r evi sed sect i ons of t he same sect i on number as i ndi cat ed. Changes i n t he t ext ar e i ndi cat ed by addi t i ons and del et i ons. Added t ext i s i dent i f i ed by gr een under scor i ng and del et ed t ext i s i dent i f i ed by r ed over st r i ke.

Copi es of t he r evi sed sect i ons ar e at t ached.

Sect i on 01 54 00 DREDGI NG PLANT AND EQUI PMENT Sect i on 35 20 23 MECHANI CAL DREDGI NG

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DOCUMENT 00 00 01 Page 1

SECTI ON TABLE OF CONTENTS

DI VI SI ON 01 - GENERAL REQUI REMENTS

SECTI ON 01 54 50

DREDGI NG PLANT AND EQUI PMENT

PART 1 GENERAL

1. 1 REFERENCES

1. 2 SUBMI TTALS

1. 3 PLANT AND EQUI PMENT

1. 3. 1 Locat i on Dat a Col l ect i on f or Dr edge Bucket

1. 3. 2 Suf f i c i ent Capaci t y

1. 3. 3 Reduct i on i n Capaci t y

1. 3. 4 I nspect i ons and Cer t i f i cat i ons

1. 4 LI CENSE REQUI REMENTS

PART 2 PRODUCTS ( Not Used)

PART 3 EXECUTI ON ( Not Used)

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

SECTI ON 01 54 50 Page 1

SECTI ON 01 54 50

DREDGI NG PLANT AND EQUI PMENT

PART 1 GENERAL

1. 1 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by basi c desi gnat i on onl y.

U. S. ARMY CORPS OF ENGI NEERS ( USACE)

EM 385- 1- 1 ( 2024) Saf et y and Occupat i onal Heal t h ( SOH) Requi r ement s

U. S. NATI ONAL ARCHI VES AND RECORDS ADMI NI STRATI ON ( NARA)

46 CFR Subchapt er M Towi ng Vessel s

1. 2 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. 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

Pl ant and Equi pment

Submi t a schedul e of t he pl ant and equi pment t he Cont r act or wi l l empl oy i n t he per f or mance of t he wor k of t hi s cont r act . Al so, submi t copi es of al l appl i cabl e i nspect i ons and cer t i f i cat i ons f or al l f l oat i ng pl ant and equi pment .

1. 3 PLANT AND EQUI PMENT

1. 3. 1 Locat i on Dat a Col l ect i on f or Dr edge Bucket

The dr edge pl ant must be equi pped t o r ecor d r eal t i me l ocat i on dat a f or t he posi t i on of t he bucket , t o i ncl ude hor i zont al and ver t i cal posi t i oni ng ( xyz dat a) . Thi s dat a must be avai l abl e on a cont i nuous basi s.

1. 3. 2 Suf f i c i ent Capaci t y

The Cont r act or shal l keep on t he j ob suf f i c i ent pl ant and equi pment t o meet t he r equi r ement s of t he wor k. The pl ant and equi pment shal l be i n sat i sf act or y oper at i ng condi t i on and be capabl e of saf el y and ef f i c i ent l y per f or mi ng t he wor k. The pl ant and equi pment shal l be subj ect t o i nspect i on by t he Cont r act i ng Of f i cer and/ or hi s r epr esent at i ves at al l t i mes.

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1. 3. 3 Reduct i on i n Capaci t y

No r educt i on i n t he capaci t y of t he pl ant and equi pment empl oyed on t he wor k shal l be made except by wr i t t en per mi ssi on of t he Cont r act i ng Of f i cer . The measur e of t he capaci t y of t he pl ant and equi pment shal l be i t s act ual per f or mance on t he wor k cover ed by t hi s cont r act .

1. 3. 4 I nspect i ons and Cer t i f i cat i ons

Pr i or t o commencement of wor k at t he s i t e, t he Cont r act or shal l make avai l abl e t o t he Cont r act i ng Of f i cer Repr esent at i ve f or r evi ew, copi es of al l appl i cabl e i nspect i ons and cer t i f i cat i ons of f l oat i ng pl ant and equi pment as r equi r ed by Feder al , St at e and l ocal l aws and r egul at i ons.

See al so EM 385- 1- 1, Sect i ons 16, 18, 19, and 20. Such i nspect i ons and cer t i f i cat i ons shal l be cur r ent and mai nt ai ned i n f or ce f or t he dur at i on of t hi s cont r act . Each i t em of f l oat i ng pl ant and equi pment shal l have on boar d a wast e oi l management pl an whi ch det ai l s t he i nt ended di sposal met hod f or wast e oi l .

Each vessel exceedi ng t went y- si x f eet i n l engt h, excl udi ng sheer , whi ch i s used f or pushi ng, haul i ng al ongsi de, or any ot her met hod of t owi ng shal l adher e t o t he r equi r ement s set f or t h i n 46 CFR Subchapt er M.

The pl ant and equi pment shal l be subj ect t o t he i nspect i on of t he Cont r act i ng Of f i cer and/ or t he COR at al l t i mes. The r esponsi bi l i t y f or act ual super vi s i on and di r ect i on of dr edgi ng oper at i ons i ncl udi ng t he saf e and ef f i c i ent oper at i on of dr edge pl ant and equi pment l i es wi t h t he Cont r act or .

1. 4 LI CENSE REQUI REMENTS

Each vessel exceedi ng t went y- si x f eet i n l engt h, excl udi ng sheer , whi ch i s used f or pushi ng, haul i ng al ongsi de, or any ot her met hod of t owi ng, and not r equi r ed by l aw t o have a val i d Cer t i f i cat e of I nspect i on by t he U. S.

Coast Guar d, shal l be under t he act ual di r ect i on and cont r ol of a per son l i censed f or t owi ng i n t he geogr aphi c ar ea of t he wor k by t he U. S. Coast Guar d. Li censed per sons shal l not per f or m command or ot her dut i es i n excess of t wel ve hour s i n any consecut i ve t went y- f our hour per i od except i n an emer gency.

1. 5 AUTOMATI C I DENTI FI CATI ON SYSTEM REQUI REMENTS

Al l dr edge and pl ant equi pment shal l be r egi st er ed wi t h t he AUTOMATI C I DENTI FI CATI ON SYSTEM ( AI S) i n or der t o ensur e t hat t he ent i r e f oot pr i nt of t he Cont r act ' s wor ki ng vessel s and scows ar e avai l abl e on mar i ne t r af f i cker ' s el ect r oni c char t di spl ays.

PART 2 PRODUCTS ( Not Used)

PART 3 EXECUTI ON ( Not Used)

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SECTI ON 01 54 50 Page 3

SECTI ON TABLE OF CONTENTS

DI VI SI ON 35 - WATERWAY AND MARI NE CONSTRUCTI ON

SECTI ON 35 20 23

MECHANI CAL DREDGI NG

PART 1 GENERAL

1. 1 REFERENCES

1. 2 GENERAL I NFORMATI ON

1. 3 ENVI RONMENTAL COMPLI ANCE AND PROTECTI ON

1. 4 UNDERWATER DI VI NG OPERATI ONS

1. 5 DEFI NI TI ONS

1. 5. 1 Feder al Navi gat i on Pr oj ect ( FNP)

1. 5. 2 Shoal i ng

1. 5. 3 Shoal

1. 5. 4 Mai nt enance Dr edgi ng

1. 5. 5 Mai nt enance Mat er i al

1. 6 SUBMI TTALS

1. 7 ORDER OF WORK

1. 8 ENVI RONMENTAL WI NDOWS

1. 9 NOTI FI CATI ONS

1. 9. 1 Not i ce of Mi spl aced Mat er i al

1. 9. 2 Not i ce of Need f or Dr edgi ng Sur vey

1. 9. 3 Rel ocat i on of Navi gat i on Ai ds

1. 9. 4 Pl acement of Dr edgi ng Ai ds

1. 10 MATERI AL TO BE DREDGED

1. 10. 1 Resul t s of Expl or at i ons

1. 10. 2 I nt er pr et at i on

1. 10. 3 Debr i s

1. 10. 4 Ar t i f i c i al Obst r uct i ons and Ot her Mat er i al

1. 10. 5 Har d Mat er i al

1. 11 DEBRI S MANAGEMENT

1. 12 EXI STI NG SI TE CONDI TI ONS

1. 13 WORK AREA

1. 13. 1 Access

1. 13. 1. 1 Cont r act or Access

1. 13. 1. 2 Emer gency Access

1. 13. 2 Pr ot ect i on of Exi st i ng Wat er ways

1. 13. 3 Pr ot ect i on of Exi st i ng St r uct ur es

1. 13. 4 Pr ot ect i on of Ut i l i t y Li nes

1. 13. 5 Uni dent i f i ed Pi pel i nes or Ut i l i t i es

1. 13. 6 Saf et y of St r uct ur es

1. 14 I NSPECTI ON OF WORK

1. 14. 1 Met hod of Communi cat i on

1. 14. 2 Tr anspor t at i on

1. 15 FUEL OI L HANDLI NG

1. 16 DOCKS, PI ERS, AND MOORI NGS

1. 16. 1 Act i ve Docks, Pi er s, Gangway and Moor i ngs

1. 16. 2 Der el i ct Moor i ngs

1. 16. 3 Fl oat s

1. 17 PERMI TS

1. 18 BASI S FOR BI DS

PART 2 PRODUCTS

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PART 3 EXECUTI ON

3. 1 DREDGI NG PLANT AND ASSOCI ATED EQUI PMENT

3. 1. 1 Gener al Requi r ement s

3. 1. 2 Dr edgi ng Pl ant

3. 1. 3 Associ at ed Equi pment

3. 1. 3. 1 Tow Boat s

3. 1. 3. 2 Scows

3. 1. 4 Ot her Equi pment

3. 2 CONDUCT OF DREDGI NG WORK

3. 2. 1 Gener al

3. 2. 2 Dr edgi ng Oper at i on Pl an

3. 2. 3 I nt er f er ence wi t h Navi gat i on

3. 2. 4 Dr edge Posi t i oni ng Syst em

3. 2. 5 Si gnal Li ght s

3. 2. 6 Sal vaged Mat er i al

3. 2. 7 Met hod of Communi cat i on

3. 2. 8 Pl ant and Equi pment Removal

3. 3 VESSELS USED FOR TRANSPORTI NG DREDGED MATERI AL

3. 4 DI SPOSAL OF DREDGED MATERI AL

3. 4. 1 Di sposal Si t es

3. 4. 2 Non- Desi gnat ed Di sposal Si t es

3. 5 DREDGI NG LI MI TS

3. 5. 1 Al l owabl e Over dept h

3. 5. 2 Si de Sl opes

3. 5. 3 Excessi ve Dr edgi ng

3. 6 CONTRACTOR QUALI TY CONTROL

3. 7 SHOALI NG

3. 8 FI NAL CLEANUP AND DEMOBI LI ZATI ON

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SECTI ON 35 20 23

MECHANI CAL DREDGI NG

PART 1 GENERAL

1. 1 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by t he basi c desi gnat i on onl y.

U. S. ARMY CORPS OF ENGI NEERS ( USACE)

EM 385- 1- 1 ( 2024) Saf et y and Occupat i onal Heal t h ( SOH) Requi r ement s

1. 2 GENERAL I NFORMATI ON

Thi s Sect i on cover s t he per f or mance f or al l wor k r equi r ed t o r emove t he speci f i ed mat er i al s f r om wi t hi n t he pr escr i bed wor k ar ea l i mi t s as i ndi cat ed, and pl acement of t he dr edge mat er i al wi t hi n t he pr escr i bed desi gnat ed di sposal s i t e. The Cont r act or i s r esponsi bl e f or maki ng t hei r own i nvest i gat i on of submer ged, sur f ace, and over head st r uct ur es i n t he wor k ar eas and ot her l ocat i ons t hey f i nd necessar y t o t r aver se. The Cont r act or shal l ver i f y s i t e condi t i ons i n advance of dr edgi ng oper at i ons.

1. 3 ENVI RONMENTAL COMPLI ANCE AND PROTECTI ON

The Cont r act or shal l compl y wi t h condi t i ons and r equi r ement s of envi r onment al per mi t ( s) . The Gover nment wi l l secur e t he envi r onment al per mi t ( s) f or dr edgi ng and pl acement of mat er i al as i ndi cat ed under Subpar t ENVI RONMENTAL PERMI TS AND COMMI TMENTS i n Sect i on 01 57 19

TEMPORARY ENVI RONMENTAL CONTROLS.

Dur i ng t he l i f e of t he cont r act , t he Cont r act or shal l pr ovi de and mai nt ai n envi r onment al pr ot ect i ve measur es. Al so, t he Cont r act or shal l be pr epar ed and r esponsi bl e f or pr ovi di ng envi r onment al c l ean- up and pr ot ect i ve measur es r equi r ed t o cor r ect condi t i ons, such as hazar dous mat er i al , oi l spi l l s , or l oss of debr i s, t hat occur dur i ng t he dr edgi ng oper at i ons. The Cont r act or shal l compl y wi t h Feder al , St at e, and l ocal r egul at i ons per t ai ni ng t o wat er , ai r , and noi se pol l ut i on. Ref er t o Sect i on 01 57 19

TEMPORARY ENVI RONMENTAL CONTROLS.

1. 4 UNDERWATER DI VI NG OPERATI ONS

I n t he event t hat under wat er di v i ng oper at i ons become necessar y due t o t he wor k of t hi s cont r act , such oper at i ons shal l be conduct ed i n accor dance wi t h EM 385- 1- 1, Sect i on 30.

1. 5 DEFI NI TI ONS

1. 5. 1 Feder al Navi gat i on Pr oj ect ( FNP)

The FNP under t hi s cont r act i s def i ned as t he 11- f oot deep ent r ance channel , a 9- f oot - deep channel , a 6- f oot - deep channel , t wo 6- f oot - deep anchor ages, t wo 9- f oot - deep anchor ages, an 11- f oot - deep anchor age, and a

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6- f oot - deep t ur ni ng basi n.

1. 5. 2 Shoal i ng

Shoal i ng i s t he deposi t i on, or bui l d- up, of sedi ment i n t he Feder al Navi gat i on Pr oj ect ( FNP) causi ng a r educt i on i n t he wat er dept h.

1. 5. 3 Shoal

An ar ea of deposi t ed sedi ment wher e t he wat er dept h i s l ess t han t he r equi r ed dept h.

1. 5. 4 Mai nt enance Dr edgi ng

Mai nt enance Dr edgi ng under t hi s cont r act i s def i ned as t he r emoval of shoal ed mat er i al t hat has accumul at ed wi t hi n t he Feder al Navi gat i on Pr oj ect ( FNP) s i nce t he compl et i on of t he l ast mai nt enance dr edgi ng.

1. 5. 5 Mai nt enance Mat er i al

Mai nt enance mat er i al i s def i ned as shoal s and sedi ment s t hat have accumul at ed wi t hi n t he Feder al Navi gat i on Pr oj ect af t er pr evi ous mai nt enance dr edgi ng oper at i ons. Mai nt enance mat er i al al so i ncl udes accumul at ed sedi ment mat er i al t hat s l oughs of f s i de s l opes.

1. 6 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. 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

Dr edgi ng Oper at i on Pl an; G, RO

Submi t a wor k pl an f or accompl i shi ng t he dr edgi ng wor k of t hi s cont r act .

Debr i s Management Pl an

Devel op and submi t a debr i s management pl an t o t he Cont r act i ng Of f i cer f or r evi ew.

Scows

Submi t scow car ds f or each scow t o be used f or cont r act wor k.

Scow car ds shal l have i nf or mat i on speci f i ed i n par agr aph " Scows" .

Desi gnat ed Haul Rout e; G, RO

SD- 05 Desi gn Dat a

Equi pment and Per f or mance Dat a

The Cont r act or shal l f ur ni sh pr oof of el ect r oni c posi t i oni ng equi pment cal i br at i on t o t he Cont r act i ng Of f i cer .

SECTI ON 35 20 23 Page 4

Dai l y Repor t of Oper at i ons

Submi t Dai l y Repor t of Oper at i ons f or each dr edge. Thi s r epor t shal l be submi t t ed on a dai l y basi s as speci f i ed under subpar t bel ow t i t l ed " Cont r act or Qual i t y Cont r ol . "

Mont hl y Repor t of Oper at i ons

Submi t a Mont hl y Repor t of Oper at i ons f or each mont h or par t i al mont h' s wor k as speci f i ed under subpar t bel ow t i t l ed " Cont r act or Qual i t y Cont r ol . "

1. 7 ORDER OF WORK

a. The Cont r act or shal l pr epar e and submi t t o t he Cont r act i ng Of f i cer f or r evi ew and appr oval a pr ogr ess schedul e i n accor dance wi t h Sect i on 01 11 00 SUMMARY OF WORK, Par agr aph " Wor k Sequence" and Sect i on 01 57 19 TEMPORARY ENVI RONMENTAL CONTROLS, Subpar t 1. 9. 1 " Envi r onment al Dr edge Wi ndow" .

b. Ther e i s no speci f i c or der of wor k f or t hi s pr oj ect . The dr edgi ng per f or med by al l dr edges shal l be cont i nuous wi t hi n r eaches appr oved by t he Cont r act i ng Of f i cer .

c. The Gover nment r eser ves t he r i ght t o change t he or der of wor k at any t i me.

1. 8 ENVI RONMENTAL WI NDOWS

Al l wor k shal l be accompl i shed wi t hi n t he desi gnat ed envi r onment al wi ndows speci f i ed under Subpar t PERI OD OF PERFORMANCE, ENVI RONMENTAL WI NDOW, AND DREDGI NG AND DI SPOSAL PERI OD i n Sect i on 01 11 00 SUMMARY OF WORK and Sect i on 01 57 19 TEMPORARY ENVI RONMENTAL CONTROLS, Subpar t 1. 9. 1, " Envi r onment al Dr edge Wi ndow" .

1. 9 NOTI FI CATI ONS

1. 9. 1 Not i ce of Mi spl aced Mat er i al

The Cont r act or shal l not i f y t he Cont r act i ng Of f i cer and t he U. S. Coast Guar d Mar i ne Saf et y Of f i ce of any mi spl aced mat er i al .

1. 9. 2 Not i ce of Need f or Dr edgi ng Sur vey

Ref er t o Sect i on 01 71 23 FI ELD ENGI NEERI NG FOR DREDGI NG f or met hod of measur ement , qual i t y cont r ol sur veys, Gover nment and Cont r act or sur veys, vol ume comput at i ons, and r equi r ed not i ce t o t he Cont r act i ng Of f i cer .

1. 9. 3 Rel ocat i on of Navi gat i on Ai ds

The Cont r act or shal l not r emove, change t he l ocat i on of , obst r uct , wi l l f ul l y damage, make f ast t o, or i nt er f er e wi t h any ai d t o navi gat i on.

The Cont r act or shal l not i f y t he U. S. Coast Guar d Di st r i ct Commander , i n wr i t i ng, wi t h a copy t o t he Cont r act i ng Of f i cer , 30 days i n advance of t he t i me he pl ans t o dr edge adj acent t o any ai ds whi ch r equi r e r el ocat i on t o f aci l i t at e t he dr edgi ng oper at i on. A copy of t he not i f i cat i on shal l be pr ovi ded t o t he Cont r act i ng Of f i cer .

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1. 9. 4 Pl acement of Dr edgi ng Ai ds

The Cont r act or shal l not i f y and obt ai n appr oval f r om t he U. S. Coast Guar d f or al l buoys, dr edgi ng ai d mar ker s t o be pl aced i n t he wat er , and dr edgi ng ai d mar ker s af f i xed wi t h a l i ght pr i or t o t he i nst al l at i on.

Dr edgi ng ai d mar ker s and l i ght s shal l not be col or ed or pl aced i n a manner t hat t hey wi l l obst r uct or be conf used wi t h navi gat i on ai ds.

1. 10 MATERI AL TO BE DREDGED

1. 10. 1 Resul t s of Expl or at i ons

a. Expl or at i ons consi st i ng of cor e sampl es t o det er mi ne t he char act er of mat er i al s t o be r emoved have been made by t he Gover nment f or sel ect ed ar eas of t hi s pr oj ect . Gr ai n s i ze anal ysi s r esul t s ar e at t ached at t he end of Sect i on 00 32 00 GEOTECHNI CAL DATA. Al t hough t he r esul t s of such expl or at i ons ar e r epr esent at i ve of subsur f ace condi t i ons at t hei r r espect i ve l ocat i ons and f or t hei r r espect i ve ver t i cal r eaches, l ocal var i at i ons i n t he subsur f ace mat er i al s ar e t o be expect ed and, i f encount er ed, wi l l not be consi der ed mat er i al l y di f f er ent wi t hi n t he pur vi ew of t he cont r act .

b. Fi f t een sedi ment sampl es ( A t hr ough 0) wer e col l ect ed i n Jul y 2021, except st at i on I , J and L wer e col l ect ed on August 2022 by USACE, New Engl and Di st r i ct t o anal yze and measur e t he gr ai n s i zes of t he mat er i al t o be r emoved f r om wi t hi n t he Feder al Navi gat i on Pr oj ect .

Test r esul t s i ndi cat ed t hat t he mat er i al was pr edomi nant l y f i ne- gr ai ned sedi ment . For sampl i ng l ocat i ons wi t hi n t he Feder al Navi gat i on Pr oj ect , r ef er t o t he " Sedi ment Sampl e Locat i ons" Fi gur e i ncl uded i n t he Sui t abi l i t y Det er mi nat i on at t achment at t he end of t he speci f i cat i on document .

c. I t i s t he r esponsi bi l i t y of t he Cont r act or t o car ef ul l y exami ne t he condi t i ons t hat exi st at t he s i t e of t he pr oposed wor k, and t o r evi ew t he cont r act document s and any ot her i nf or mat i on gat her ed f or use i n det er mi ni ng equi pment , means, and met hods f or t he execut i on of t he wor k r equi r ed i n t hi s cont r act . Thi s i s not onl y f or t he pur pose of maki ng t hei r own det er mi nat i on r egar di ng t he char act er of t he mat er i al t o be dr edged, but al so f or t he pur pose of not i ng t he pr esence of any condi t i ons whi ch may i mpact t hei r pr oduct i v i t y or abi l i t y t o compl et e t he wor k. I mpact s t o t he pr oj ect whi ch ar e f ound t o be r esul t i ng f r om a l ack of appr opr i at e due di l i gence on behal f of t he Cont r act or shal l not be r ecogni zed as a l egi t i mat e basi s f or r enegot i at i ng t he t er ms of payment f or , or t he pr osecut i on or compl et i on of , t he Wor k.

d. Pr i or t o bi ddi ng, t he Cont r act or may, at i t s di scr et i on and expense, conduct addi t i onal i nvest i gat i ons t o f ur t her det er mi ne condi t i ons at t he s i t e and det er mi ne t he char act er of t he mat er i al .

1. 10. 2 I nt er pr et at i on

Subsur f ace i nvest i gat i on dat a i s pr ovi ded f or i nf or mat i onal pur poses onl y and i s f or t he conveni ence of t he Cont r act or . The dat a per t ai ns t o t he speci f i c l ocat i ons i ndi cat ed onl y and no assur ance i s gi ven t hat t hese condi t i ons ar e r epr esent at i ve of condi t i ons bet ween bor i ngs or ar eas adj acent t her et o. The r esponsi bi l i t y l i es wi t h t he Cont r act or t o i nt er pr et subsur f ace condi t i ons t hat may af f ect t he Wor k.

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1. 10. 3 Debr i s

Al l debr i s r emoved f r om t he dr edgi ng ar ea wi l l be separ at ed and st ockpi l ed f or di sposal by t he Cont r act or , i n accor dance wi t h l ocal , Feder al and st at e l aws and r egul at i ons, at an upl and si t e suppl i ed by t he Cont r act or .

Di sposal shal l be t he r esponsi bi l i t y of t he Cont r act or and di sposal shal l be out si de of t he pr oj ect l i mi t s.

1. 10. 4 Ar t i f i c i al Obst r uct i ons and Ot her Mat er i al

Except f or t he ut i l i t y l ocat i ons i ndi cat ed on t he cont r act dr awi ngs, t he Gover nment has no addi t i onal knowl edge of exi st i ng debr i s, boul der s, cabl es, pi pes, or ot her ar t i f i c i al obst r uct i ons or of any wr ecks, wr eckage, or ot her mat er i al t hat woul d necessi t at e t he use of expl osi ves or t he empl oyment of addi t i onal equi pment f or economi cal r emoval . I f act ual condi t i ons di f f er f r om t hose st at ed or shown, or bot h, an adj ust ment i n cont r act pr i ce or t i me f or compl et i on, or bot h, wi l l be made i n accor dance wi t h " FAR 52. 236- 2, Di f f er i ng Si t e Condi t i ons" .

1. 10. 5 Har d Mat er i al

The Gover nment has no knowl edge of har d mat er i al ( f r agment s t oo l ar ge t o be r emoved i n one pi ece by t he dr edge) such as exi st i ng boul der s, wr ecks or wr eckage, or ot her mat er i al of such si ze or char act er as t o r equi r e t he use of expl osi ves or speci al or addi t i onal equi pment f or i t s economi cal r emoval . I n case t he act ual condi t i ons di f f er f r om t hose st at ed or shown, or bot h, an adj ust ment i n cont r act pr i ce or t i me of compl et i on, or bot h, wi l l be made i n accor dance wi t h " FAR 52. 236- 2, Di f f er i ng Si t e Condi t i ons. "

1. 11 DEBRI S MANAGEMENT

A Debr i s Management Pl an shal l be devel oped, r evi ewed by t he Cont r act i ng Of f i cer , and f ol l owed by t he Cont r act or . Debr i s r emoved f r om t he bot t om dur i ng dr edgi ng oper at i ons, whi ch i s not sui t abl e f or di sposal at t he desi gnat ed di sposal s i t e, shal l be col l ect ed and r emoved f r om t he wor k s i t e. Al l obj ect s t hat become di s l odged f r om t he bot t om sedi ment s dur i ng dr edgi ng act i v i t i es and f l oat t o t he sur f ace shal l be col l ect ed, separ at ed and st ockpi l ed f or di sposal upl and. Di sposal of debr i s shal l not be per mi t t ed on r i ver banks, navi gabl e wat er ways, or at t he di sposal s i t e.

Each day dur i ng dr edgi ng oper at i ons, t he Cont r act or shal l use a boat t o col l ect and r emove f l oat i ng debr i s r esul t i ng f r om pr oj ect act i v i t i es.

Thi s debr i s shal l become t he pr oper t y of t he Cont r act or and shal l be r emoved f r om t he j obsi t e. Cont ai ner s f or t empor ar y st or age of t he col l ect ed debr i s shal l be mai nt ai ned on t he dr edge or suppor t bar ge. The r emoval and di sposal of t hi s debr i s shal l be accompl i shed at no addi t i onal cost t o t he Gover nment .

1. 12 EXI STI NG SI TE CONDI TI ONS

I t i s hi ghl y r ecommended t hat t he bi dder s exami ne t he si t e of t he wor k, i ncl udi ng t he di sposal ar ea and deci de f or t hemsel ves as t o t he condi t i ons af f ect i ng t hei r oper at i ons. See Cont r act Cl ause ent i t l ed: " SI TE

I NVESTI GATI ON AND CONDI TI ONS AFFECTI NG THE WORK. "

SECTI ON 35 20 23 Page 7

1. 13 WORK AREA

1. 13. 1 Access

1. 13. 1. 1 Cont r act or Access

The Cont r act or shal l be r esponsi bl e f or pr ovi di ng and mai nt ai ni ng access necessar y f or i t s equi pment and pl ant t o and f r om t he wor k s i t e, moor i ng ar ea, and di sposal ar ea. The Cont r act or shal l ascer t ai n t he envi r onment al condi t i ons whi ch can af f ect t he access such as c l i mat e, wi nds, cur r ent s, waves, dept hs, shoal i ng, and scour i ng t endenci es.

1. 13. 1. 2 Emer gency Access

The Cont r act or shal l be r esponsi bl e f or pr ovi di ng and mai nt ai ni ng access necessar y f or f i r eboat s and f i r st r esponder s i n t he event of a f i r e or emer gency.

1. 13. 2 Pr ot ect i on of Exi st i ng Wat er ways

The Cont r act or shal l conduct hi s oper at i ons i n such a manner t hat mat er i al or ot her debr i s ar e not pushed out si de of dr edgi ng l i mi t s or ot her wi se deposi t ed i n exi st i ng s i de channel s, basi ns, docki ng ar eas, or ot her ar eas bei ng ut i l i zed by vessel s. The Cont r act or wi l l be r equi r ed t o change hi s met hod of oper at i ons as may be r equi r ed t o compl y wi t h t he above r equi r ement s. Shoul d any bot t om mat er i al or ot her debr i s be pushed i nt o ar eas descr i bed above, as a r esul t of t he Cont r act or ' s oper at i ons, t he mat er i al must be pr ompt l y r emoved at no addi t i onal cost t o t he Gover nment .

1. 13. 3 Pr ot ect i on of Exi st i ng St r uct ur es

a. The Cont r act or shal l conduct t he dr edgi ng oper at i on such t hat i t does not under mi ne, weaken or ot her wi se i mpai r exi st i ng st r uct ur es l ocat ed i n or near t he ar eas t o be dr edged. The Cont r act or shal l i nvest i gat e t he exi st i ng st r uct ur es at t he s i t e and pl an t he dr edgi ng wor k accor di ngl y.

b. The Cont r act or shal l be hel d r esponsi bl e f or any damage t o any exi st i ng st r uct ur es or f aci l i t i es r esul t i ng f r om dr edgi ng. Damage r esul t i ng f r om dr edgi ng oper at i ons shal l be r epai r ed pr ompt l y by t he Cont r act or at t he Cont r act or ' s expense. Damage t o st r uct ur es or f aci l i t i es r esul t i ng f r om t he Cont r act or ' s negl i gence wi l l r esul t i n suspensi on of dr edgi ng and r equi r e pr ompt r epai r at t he Cont r act or ' s expense as a pr er equi s i t e t o t he r esumpt i on of dr edgi ng.

1. 13. 4 Pr ot ect i on of Ut i l i t y Li nes

Exi st i ng ut i l i t y l i nes t hat ar e made known t o t he Cont r act or pr i or t o or dur i ng dr edgi ng shal l be pr ot ect ed f r om damage dur i ng dr edgi ng, and i f damaged, shal l be sat i sf act or i l y r epai r ed by t he Cont r act or at no addi t i onal cost t o t he Gover nment .

I n t he event t hat t he Cont r act or damages any exi st i ng ut i l i t y l i nes t hat ar e not shown on t he Cont r act Dr awi ngs or t he l ocat i ons of whi ch ar e not known t o t he Cont r act or , r epor t shal l be made i mmedi at el y t o t he Cont r act i ng Of f i cer . I f t he Cont r act i ng Of f i cer det er mi nes t hat r epai r s shal l be made by t he Cont r act or , such r epai r s wi l l be or der ed under t he Cont r act Cl ause ent i t l ed DI FFERI NG SI TE CONDI TI ONS.

SECTI ON 35 20 23 Page 8

1. 13. 5 Uni dent i f i ed Pi pel i nes or Ut i l i t i es

Any uni dent i f i ed pi pel i nes or ut i l i t i es t hat may be f ound wi t hi n t he l i mi t s of t he wor k, dur i ng t he cour se of dr edgi ng shal l not be di st ur bed nor shal l excavat i on be per f or med at t hi s l ocat i on unl ess appr oved by t he Cont r act i ng Of f i cer . I f act ual condi t i ons di f f er f r om t hose st at ed or shown, or bot h, an adj ust ment i n cont r act pr i ce or t i me f or compl et i on, or bot h, wi l l be made i n accor dance wi t h " FAR 52. 236- 2, Di f f er i ng Si t e Condi t i ons. "

1. 13. 6 Saf et y of St r uct ur es

The pr osecut i on of wor k shal l ensur e t he st abi l i t y of pi er s, bul kheads, and any ot her st r uct ur es l y i ng on or adj acent t o t he s i t e of t he wor k, i nsof ar as st r uct ur es may be j eopar di zed by dr edgi ng oper at i ons. Repai r damage r esul t i ng f r om dr edgi ng oper at i ons, i nsof ar as such damage may be caused by var i at i on i n l ocat i ons or dept h of dr edgi ng, or bot h, f r om t hat i ndi cat ed or per mi t t ed under t he cont r act .

1. 14 I NSPECTI ON OF WORK

I nspect t he wor k, keep r ecor ds of wor k per f or med, and ensur e t hat gages, t ar get s, r anges, and ot her mar ker s ar e i n pl ace and usabl e f or t he i nt ended pur pose. See Sect i on 01 45 00 CONTRACTOR QUALI TY CONTROL, and Sect i on 35 20 23. 13 NATI ONAL DREDGI NG QUALI TY MANAGEMENT PROGRAM: SCOW -

MONI TORI NG PROFI LE.

1. 14. 1 Met hod of Communi cat i on

For t he dur at i on of t he cont r act pr ovi de t he Cont r act i ng Of f i cer wi t h t wo por t abl e t wo- way VHF mar i ne r adi os capabl e of communi cat i ng wi t h t he Cont r act or ' s mar i ne pl ant and t o pr ovi de communi cat i on bet ween t he dr edge cr ew, di sposal cr ew, and t he Cont r act i ng Of f i cer .

1. 14. 2 Tr anspor t at i on

The Cont r act or shal l pr ovi de, at t he r equest of t he Cont r act i ng Of f i cer ' s Repr esent at i ve ( COR) , t he use of such boat s, boat men, l abor er s, and mat er i al f or mi ng a par t of t he or di nar y and usual equi pment and cr ew of t he equi pment or mar i ne pl ant as may be r easonabl y necessar y i n i nspect i ng and moni t or i ng t he wor k. The Cont r act or shal l pr ovi de, at t he r equest of t he COR, sui t abl e t r anspor t at i on f r om al l poi nt s on shor e desi gnat ed by t he COR t o and f r om t he var i ous pi eces of pl ant , and t he wor k s i t e.

1. 15 FUEL OI L HANDLI NG

The Cont r act or shal l assur e t hat al l f uel oi l t r ansf er oper at i ons t o or f r om i t s pl ant compl y wi t h al l Feder al , st at e, and l ocal l aws, codes and r egul at i ons.

1. 16 DOCKS, PI ERS, AND MOORI NGS

1. 16. 1 Act i ve Docks, Pi er s, Gangway and Moor i ngs

The Nar r aguagus Ri ver Har bor mast er wi l l be r esponsi bl e f or t he r emoval of al l v i s i bl e moor i ngs wi t hi n t he l i mi t s of t he Feder al Navi gat i on Pr oj ect ( FNP) at no cost t o t he Cont r act or . Moor i ngs wi l l be r emoved f r om t he dr edge ar ea pr i or t o t he Cont r act or ' s mobi l i zat i on t o t he s i t e.

SECTI ON 35 20 23 Page 9

1. 16. 2 Der el i ct Moor i ngs

Der el i ct moor i ngs l ocat ed by t he Cont r act or dur i ng dr edgi ng oper at i ons, or ot her wi se made known t o t he Cont r act or , shal l be r epor t ed t o t he Cont r act i ng Of f i cer . The Cont r act i ng Of f i cer wi l l ver i f y t he l ocat i on of t he moor i ngs and any pot ent i al hazar ds t o navi gat i on. The Cont r act or shal l be pr epar ed t o r emove der el i ct moor i ngs, t r anspor t , unl oad and r ecor d a coor di nat e of each pl aced der el i ct moor i ng i n t he Der el i ct Moor i ng Pl acement Ar ea as shown on sheet G- 002 and C- 106.

1. 16. 3 Fl oat s

Pr i or t o t he Cont r act or ' s mobi l i zat i on t o t he s i t e, t he Nar r aguagus Ri ver Har bor mast er wi l l r emove t he f l oat i ng dock, pi er and gangway f r om t he nor t heast of t he f eder al channel as desi gnat ed and shown on t he Cont r act Dr awi ng sheet C- 101. The Cont r act or shal l be awar e t hat al t hough t he f l oat i ng dock i s t o be r emoved, t hei r pi er s wi l l r emai n i n pl ace. The Cont r act or shal l al so be awar e t hat t he dock, pi er and gangway i n t he sout h of t he st at e anchor age as desi gnat ed and shown on t he Cont r act Dr awi ng sheet C- 106 wi l l r emai n i n pl ace and undi st ur bed. The Town wi l l r et ur n t he f l oat i ng dock and moor i ngs af t er t he dr edgi ng wor k i s accept ed by t he Gover nment .

1. 17 PERMI TS

The Cont r act or shal l compl y wi t h condi t i ons and r equi r ement s of t he Cor ps of Engi neer s Per mi t and ot her St at e or Feder al per mi t s. The Cont r act i ng Of f i cer wi l l secur e t he per mi t f or dr edgi ng and di sposal of mat er i al as i ndi cat ed.

1. 18 BASI S FOR BI DS

For uni t pr i ce bi d, see SF 1442, " Sol i c i t at i on, Of f er and Awar d" and " Schedul e of Bi d I t ems. "

PART 2 PRODUCTS

Not Used

PART 3 EXECUTI ON

3. 1 DREDGI NG PLANT AND ASSOCI ATED EQUI PMENT

3. 1. 1 Gener al Requi r ement s

Pl ant and equi pment shal l meet t he r equi r ement s of Sect i on 01 54 50

DREDGI NG PLANT AND EQUI PMENT.

3. 1. 2 Dr edgi ng Pl ant

a. Al l dr edgi ng under t hi s cont r act shal l be per f or med usi ng a mechani cal t ype dr edge wi t h scows. The use of hydr aul i c dr edgi ng wi l l not be per mi t t ed on t hi s pr oj ect . No dr aggi ng of mat er i al wi l l be al l owed except as di r ect ed by t he Cont r act i ng Of f i cer .

b. Mat er i al r emoved by dr edgi ng shal l be l oaded ont o scows, t r anspor t ed, and di sposed of at t he appr oved di sposal s i t e as speci f i ed bel ow.

Over f l ow of scows whi l e dr edgi ng shal l not be per mi t t ed.

SECTI ON 35 20 23 Page 10

3. 1. 3 Associ at ed Equi pment

3. 1. 3. 1 Tow Boat s

Al l t ow boat s used f or t owi ng t o di sposal ar eas shal l be equi pped wi t h DGPS and t r ack r ecor di ng navi gat i onal equi pment or appr oved equi val ent el ect r oni c navi gat i on equi pment , r adar , cor r ect ed compass, mar i ne r adi o, and dept h soundi ng equi pment whi ch i s t o be mai nt ai ned i n oper at i ng condi t i on dur i ng each t ow. The t ow boat s ut i l i zed by t he Cont r act or f or t hi s pur pose shal l be of a s i ze adequat e f or t owi ng i n l ar ge r i ver s wi t h s i gni f i cant cur r ent and shal l have necessar y r eser ve power f or maneuver i ng wi t h scows and under emer gency condi t i ons as wel l as f or cont r ol of scows at t he di sposal poi nt .

3. 1. 3. 2 Scows

a. Fai l ur e t o r epai r l eaks or a change i n t he met hod of oper at i on whi ch i s r esul t i ng i n spi l l age wi l l r esul t i n suspensi on of dr edgi ng oper at i ons and r equi r e pr ompt r epai r or change of oper at i on t o pr event spi l l age as a pr er equi s i t e t o t he r esumpt i on of dr edgi ng.

b. The Cont r act or shal l pr ovi de and mai nt ai n mar ki ngs on al l scows cl ear l y i ndi cat i ng t he dr af t of t he scow and shal l pr ovi de scow car ds f or each scow used on t he cont r act wor k. The scow car ds shal l show di mensi ons and vol umes of i ndi v i dual pocket s of scows and t ot al vol umes f or var yi ng dept hs bel ow coami ng or t op of pocket s. The Cont r act or shal l al so pr ovi de dr af t ver ses di spl acement cur ves f or al l scows. Thi s i s t o enabl e t he Cont r act i ng Of f i cer per sonnel t o make a det er mi nat i on of scow vol ume and cor r espondi ng dr af t s under par t i al and f ul l l oad condi t i ons. These measur ement s ar e t o be made at t he t i me of i ni t i al use of each scow. The scow vol ume est i mat es ar e f or use i n connect i on wi t h di sposal ar ea moni t or i ng st udi es and ar e not i nt ended t o be used i n det er mi ni ng quant i t i es dr edged. At t he begi nni ng of t he wor k and as addi t i onal scows ar r i ve on t he pr oj ect , suf f i c i ent t i me shal l be al l owed by t he Cont r act or and assi st ance of Cont r act or per sonnel shal l be made avai l abl e by t he Cont r act or f or t he pur pose of obt ai ni ng t he measur ement s of each scow under var i ous par t i al and f ul l l oad condi t i ons. Dur i ng t he ent i r e per i od of cont r act wor k, t he Cont r act or shal l pr ovi de and mai nt ai n suf f i c i ent spot or f l oodl i ght s t o per mi t t he r eadi ng of t he dr af t on t he s i des of scows at bow and st er n f r om t he t ow boat at ni ght and when vi s i bi l i t y i s i mpai r ed.

c. The Cont r act or shal l achi eve pr oper c l osur e and wat er t i ght ness of pocket door s t o el i mi nat e seepage or l eakage of mat er i al . The use of pl ast i c mat er i al t o cover cr acks i n scow pocket s wi l l not be al l owed.

3. 1. 4 Ot her Equi pment

Submi t al l ot her equi pment speci f i cat i ons and oper at i ng par amet er s f or r evi ew and appr oval by t he Cont r act i ng Of f i cer pr i or t o mobi l i zat i on. No addi t i onal compensat i on shal l be consi der ed i f ot her equi pment i s al l owed.

3. 2 CONDUCT OF DREDGI NG WORK

3. 2. 1 Gener al

Dr edgi ng shal l consi st of t he r emoval and sat i sf act or y di sposal of al l mat er i al encount er ed t o achi eve t he r equi r ed dept hs and si de sl opes as

SECTI ON 35 20 23 Page 11 shown on t he Cont r act Dr awi ngs and as speci f i ed her ei n.

3. 2. 2 Dr edgi ng Oper at i on Pl an

At l east 30 cal endar days pr i or t o i ni t i at i ng any dr edgi ng, t he Cont r act or shal l submi t a det ai l ed dr edgi ng oper at i on pl an f or r evi ew and comment by t he Cont r act i ng Of f i cer . Dr edgi ng shal l not commence unt i l pl an has been accept ed, t o t he sat i sf act i on, of t he Cont r act i ng Of f i cer . The pl an shal l i ncl ude, but not be l i mi t ed t o, descr i pt i on of mechani cal dr edgi ng ( bucket , c l amshel l ( gr ab) or di pper ( backhoe) ) oper at i ons, sequence of wor k, ant i c i pat ed pl ant and equi pment ; Expect ed coor di nat i on r equi r ement s;

access, l ayout of dr edgi ng l i mi t s, dr edgi ng t o pr oj ect dept hs, r et ent i on of mat er i al , sur vey r equi r ement s; pr oposed measur es t o avoi d over dr edgi ng;

s i de s l ope mat er i al r emoval met hodol ogy; s i de s l opes or box cut ; anchor i ng l ocat i ons; qual i t y cont r ol sur vey pr ocedur es; ant i c i pat ed pr obl em ar eas of pr oj ect ; and al l ant i c i pat ed navi gat i on channel c l osur es.

3. 2. 3 I nt er f er ence wi t h Navi gat i on

Mi ni mi ze i nt er f er ence wi t h t he use of channel s and passages. The Cont r act i ng Of f i cer wi l l di r ect t he shi f t i ng or movi ng of dr edges or t he i nt er r upt i on of dr edgi ng oper at i ons t o accommodat e t he movement of r ecr eat i onal and commer ci al vessel s and f l oat i ng equi pment , i f necessar y.

The Cont r act or shal l compl y wi t h al l r equest s f r om t he Cont r act i ng Of f i cer t o move or i nt er r upt dr edgi ng oper at i ons f or a per i od of 2 hour s or l ess at no addi t i onal cost t o t he Gover nment .

3. 2. 4 Dr edge Posi t i oni ng Syst em

The dr edge shal l be equi pped wi t h an el ect r oni c dr edge bucket posi t i oni ng syst em ( DBPS) consi st i ng of Real - t i me Ki nemat i c Di f f er ent i al Gl obal Posi t i oni ng Syst em ( RTK- DGPS) , and posi t i oni ng and t r acki ng sof t war e, t o enabl e accur at e posi t i oni ng of t he dr edge. At a mi ni mum, t he RTK- DBPS shal l be capabl e of pr esent i ng a dr edge pr i sm f i l e on a gr i d, and pr ovi de t he oper at or a r eal - t i me, heads- up di spl ay of t he bucket and dr edge i n r el at i on t o s i t e bat hymet r y, r equi r ed el evat i on and al l owabl e over dept h sur f aces, and any obst acl es, i n pl an and sect i on v i ews.

3. 2. 5 Si gnal Li ght s

Each ni ght , bet ween sunset and sunr i se and dur i ng per i ods of r est r i ct ed vi s i bi l i t y , pr ovi de l i ght s f or f l oat i ng pl ant s and equi pment , appl i cabl e pi pel i ne, r anges, and mar ker s. Al so, pr ovi de l i ght s f or buoys t hat coul d endanger or obst r uct navi gat i on. When ni ght wor k i s i n pr ogr ess, mai nt ai n l i ght s f r om sunset t o sunr i se f or t he obser vat i on of dr edgi ng oper at i ons.

Li ght i ng shal l conf or m t o Uni t ed St at es Coast Guar d r equi r ement s f or v i s i bi l i t y and col or .

3. 2. 6 Sal vaged Mat er i al

Anchor s, chai ns, and ot her ar t i c l es of val ue whi ch ar e br ought t o t he sur f ace dur i ng dr edgi ng oper at i ons shal l r emai n, or become, t he pr oper t y of t he Gover nment , and shal l be deposi t ed on shor e at a conveni ent l ocat i on near t he s i t e of t he wor k, as di r ect ed.

3. 2. 7 Met hod of Communi cat i on

For t he dur at i on of t he cont r act , t he Cont r act or shal l pr ovi de t he Cont r act i ng Of f i cer wi t h t wo ( 2) por t abl e t wo- way VHF mar i ne r adi os. One

SECTI ON 35 20 23 Page 12 of whi ch i s capabl e of communi cat i ng wi t h t he Cont r act or ' s mar i ne pl ant and anot her whi ch i s capabl e of pr ovi di ng communi cat i on bet ween t he dr edge and di sposal cr ews and t he Cont r act i ng Of f i cer .

3. 2. 8 Pl ant and Equi pment Removal

Upon compl et i on of t he wor k, pr ompt l y r emove pl ant and equi pment , i ncl udi ng r anges, buoys, pi l es, and ot her mar ker s or obst r uct i ons.

3. 3 VESSELS USED FOR TRANSPORTI NG DREDGED MATERI AL

Al l naut i cal vessel s and conveyance syst ems shal l be oper at ed, l oaded and unl oaded i n such a manner as t o pr event over f l ow, spi l l s , l eaks, or ot her l oss of dr edged mat er i al s bet ween poi nt of pi ck- up and poi nt of deposi t i on wi t hi n t he di sposal ar ea. Under no condi t i ons shal l any bar ge or scow t r anspor t i ng dr edged mat er i al s have l ess t han 1 f oot of f r eeboar d. Thi s means t her e shal l be at l east 1 f oot bet ween t he t op of dr edged mat er i al s and/ or wat er i nsi de t he scow or bar ge and t he t op edge of t he bar ge or scow. Al l vessel s f or t r anspor t i ng dr edged mat er i al s shal l be wat er t i ght , wi t h al l weep hol es or openi ngs seal ed t o pr event any l eakage of wat er or dr edged mat er i al s. Any modi f i cat i ons t o vessel s t o al l ow addi t i onal f r eeboar d shal l be appr oved by t he Cont r act i ng Of f i cer . Al l vessel s f or t r anspor t i ng dr edged mat er i al must be i nspect ed and appr oved by t he Cont r act i ng Of f i cer 7 days pr i or t o t he st ar t of dr edgi ng. The Cont r act or shal l demonst r at e t hat al l vessel s ar e sound and wat er t i ght .

3. 4 DI SPOSAL OF DREDGED MATERI AL

3. 4. 1 Di sposal Si t es

a. Gener al :

( 1) Dr edged mat er i al shal l be pl aced i n scows and t r anspor t ed t o and di sposed of at t he desi gnat ed di sposal s i t e. Pr ovi de f or saf e t r anspor t at i on and di sposal of dr edged mat er i al s. Mat er i al shal l be deposi t ed and di st r i but ed evenl y at t he di sposal s i t e.

( 2) Do not r emove l oaded or par t i al l y l oaded scows f r om t he dr edge ar ea unt i l t he l oad has been measur ed by t he Cont r act i ng Of f i cer ' s Repr esent at i ve ( COR) . Not i f y t he COR when scows ar e r et ur ned t o t he dr edge ar ea.

( 3) Pr ovi de f or saf e t r anspor t at i on and di sposal of dr edged mat er i al s. Tr anspor t and di spose of dr edged mat er i al at t he di sposal s i t e speci f i ed. Ant i c i pat ed weat her condi t i ons shal l be det er mi ned pr i or t o depar t i ng f or t he di sposal s i t e.

( 4) Year - r ound, di sposal vessel s i ncl udi ng t ugs, bar ges, and scows t r ansi t i ng bet ween t he dr edge si t e and t he di sposal s i t e shal l oper at e at speeds not t o exceed 10 knot s. For unant i c i pat ed condi t i ons, a vessel may oper at e at a speed necessar y t o mai nt ai n saf e maneuver i ng speed i nst ead of t he r equi r ed 10 knot s. The i nt ent of t hi s condi t i on i s t o r educe t he pot ent i al f or vessel col l i s i ons wi t h endanger ed t ur t l es, f i sh, and whal es.

b. Desi gnat ed Di sposal Si t es

( 1) Dougl as I s l and Di sposal Si t e ( DI DS) :

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DI DS i s l ocat ed 2. 5 mi l es f r om t he Nar r aguagus Ri ver FNP. The di sposal s i t e i s s i t uat ed i n out er Nar r aguagus Bay and l i es i n a shel t er ed ar ea bet ween a peni nsul a t o t he nor t hwest and i s l ands t o t he sout heast , sout h, and sout hwest . . Di sposal shal l occur wi t hi n t he pol ygon def i ned by t he t ar get coor di nat es pr ovi ded bel ow.

Di sposal Tar get Coor di nat es at DI DS ( ME St at e Pl ane - I s l and Zone NAD83 US Feet ) :

a. N 293887. 20, E 1152956. 59

b. N 292056. 82, E 1155062. 25

c. N 291823. 43, E 1154972. 66

d. N 291165. 97, E 1153127. 38

e. N 291207. 84, E 1151928. 11

( 2) USACE el ect r oni c coor di nat es of t he DI DS boundar y wi l l be document ed and moni t or ed by Gover nment i nspect or s dur i ng t he cour se of t he wor k. The el evat i on of t he di sposal mound( s) shal l not be hi gher t han - 20 f eet Mean Lower Low Wat er ( MLLW) . Al l di sposal shal l be done wi t h t he scow at a compl et e hal t . Thi s r equi r ement must be f ol l owed except when weat her or sea st at e cr eat e unsaf e condi t i ons i n whi ch case di sposal wi t h t he scow movi ng onl y f ast enough t o mai nt ai n saf e cont r ol ( gener al l y l ess t han one knot ) wi l l be per mi t t ed. Di sposal shal l not be at t empt ed i f t he above condi t i ons cannot be met .

Ant i c i pat ed weat her condi t i ons shal l be det er mi ned pr i or t o depar t i ng f or t he di sposal s i t e. Di sposal at t he Dougl as I s l and Di sposal Si t e may be per f or med wi t h t he scow i n mot i on at a speed no gr eat er t han 2 knot s as l ong as t he r el ease of t he mat er i al f r om t he scow ( as det er mi ned by t he dr af t change r ecor ded by t he Dr edgi ng Qual i t y Management ( DQM) Syst em) can be achi eved wi t hi n 300 f eet of t he speci f i ed t ar get .

c. Desi gnat ed Haul Rout e:

( 1) Dr edged mat er i al bei ng t r anspor t ed t o t he desi gnat ed di sposal s i t e shal l be t r anspor t ed al ong t he desi gnat ed haul r out e. The haul r out e has been coor di nat ed bet ween t he Gover nment and t he Mai ne Di vi s i on of Mar i ne Resour ces ( DMR) , and publ i shed l ocal l y i n a newspaper of gener al c i r cul at i on as a not i ce t o f i sher men t o r emove f i shi ng gear f r om t he haul r out e.

The at t achment at t he end of t hi s speci f i cat i on sect i on, t i t l ed " Haul Rout e" , pr ovi des a gener al l ayout of t he est abl i shed haul r out e f r om t he dr edge si t e t o t he Dougl as I s l and Di sposal Si t e.

( 2) The Cont r act or must not i f y t he publ i c of t he desi gnat ed haul r out es i n accor dance wi t h Sect i on 01 11 00 SUMMARY OF WORK, subpar agr aph t i t l ed " Publ i c Not i ce" .

3. 4. 2 Non- Desi gnat ed Di sposal Si t es

a. The deposi t of dr edged mat er i al s at unaut hor i zed or non- desi gnat ed di sposal s i t es i s pr ohi bi t ed and shal l be consi der ed mi spl aced mat er i al and wi l l r esul t i n t he suspensi on of dr edgi ng oper at i ons unt i l mi spl aced mat er i al i s r emoved and pr oper l y di sposed of t o t he sat i sf act i on of t he Gover nment . Cont r act or f ur ni shed di sposal ar eas wi l l not be per mi t t ed.

b. The Cont r act or shal l i mmedi at el y not i f y t he Cont r act i ng Of f i cer and t he U. S. Coast Guar d Mar i ne Saf et y Of f i ce of any mi spl aced mat er i al .

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Cost s f or t he r emoval and r e- di sposal of mi spl aced mat er i al shal l be at t he expense of t he Cont r act or .

3. 5 DREDGI NG LI MI TS

3. 5. 1 Al l owabl e Over dept h

To cover unavoi dabl e i naccur aci es of dr edgi ng pr ocesses, dr edge mat er i al s r emoved t o t he over dept hs and wi t hi n t he dr edgi ng l i mi t s as shown on t he Cont r act Dr awi ngs wi l l be measur ed and pai d f or at f ul l cont r act pr i ce.

For speci f i ed over dept hs r ef er t o Cont r act Dr awi ngs.

3. 5. 2 Si de Sl opes

a. Mat er i al dr edged t o pr ovi de f or f i nal i ndi cat ed si de sl opes wi l l be measur ed and pai d f or at t he appl i cabl e uni t pr i ce. The mat er i al may be dr edged f r om t he or i gi nal posi t i on or by dr edgi ng t he space bel ow t he pay sl ope pl ane at t he bot t om of t he s l ope f or upsl ope mat er i al capabl e of f al l i ng i nt o t he cut . Payment wi l l not be made f or mat er i al i n excess of t he amount or i gi nal l y l y i ng above t he pay sl ope pl ane. The l i mi t i ng amount of s i de- sl ope over dept h wi l l be measur ed ver t i cal l y.

b. Dr edgi ng on si de sl opes shal l f ol l ow, as c l osel y as pr act i cabl e, t he l i nes i ndi cat ed on t he Cont r act Dr awi ngs. An al l owance wi l l be made f or dr edgi ng beyond t he l i nes i ndi cat ed or speci f i ed f or s i de s l opes.

The al l owance wi l l be det er mi ned by pr oj ect i ng a l i ne upwar ds, par al l el i ng t he pr oj ect desi gn si de sl opes, f r om t he i nt er sect i on of t he over dept h dr edgi ng l i mi t ( at a poi nt l ocat ed ver t i cal l y bel ow t he l i mi t of dr edgi ng at t he t op of s l ope) . The amount of mat er i al excavat ed f r om si de sl opes wi l l be det er mi ned by ei t her cr oss- sect i ons or comput er , or bot h.

c. The Cont r act or shal l exer ci se car e i n dr edgi ng al ong t he si de sl opes near whar f s, docks, and pi er s so as not t o over dr edge t o such an ext ent as t o under mi ne t he st r uct ur es or i n any way i mpai r t he st abi l i t y of such st r uct ur es.

3. 5. 3 Excessi ve Dr edgi ng

Mat er i al t aken f r om beyond t he l i mi t s, as speci f i ed above under subpar agr aphs " Al l owabl e Over dept h" and " Si de Sl opes" , wi l l be deduct ed f r om t he t ot al amount dr edged as excessi ve over dept h dr edgi ng, or excessi ve s i de- sl ope dr edgi ng f or whi ch payment wi l l not be made.

3. 6 CONTRACTOR QUALI TY CONTROL

a. The Cont r act or shal l pr epar e, mai nt ai n, and submi t f or appr oval a Dai l y Repor t of Oper at i ons usi ng Eng For m No. 4267 ( Mechani cal Dr edgi ng) , and shal l pr ovi de t he Cont r act i ng Of f i cer wi t h s i gned copi es t her eof wi t h t he Dai l y Qual i t y Cont r ol Repor t s as r equi r ed i n Sect i on 01 45 00 QUALI TY CONTROL. A copy of t he f or m used f or Repor t of Oper at i ons i s at t ached at t he end of Sect i on 01 45 00 QUALI TY

CONTROL.

b. I n addi t i on t o t he dai l y r epor t ( s) , t he Cont r act or shal l pr epar e a Mont hl y Repor t of Oper at i ons f or each mont h or par t i al mont h' s wor k on ENG For m No. 4267 ( Mechani cal Dr edgi ng) . The mont hl y r epor t ( s) shal l be submi t t ed t o t he Cont r act i ng Of f i cer on or bef or e t he 7t h of each

SECTI ON 35 20 23 Page 15 mont h, consol i dat i ng t he pr evi ous mont h' s wor k. Upon compl et i on of t he pr oj ect , t he Cont r act or shal l submi t a consol i dat ed pr oj ect r epor t , combi ni ng t he mont hl y r epor t s.

c. Addi t i onal l y, one copy of t he r epor t s shal l be mai nt ai ned by t he Cont r act or on each dr edge f or t he Cont r act i ng Of f i cer ' s i nspect i on pur…