A21 - NOFE- W912PM23B0018_AMDT0001_Tech-Summary-Changes.pdf

Solicitation # W912PM23B0018 Date: 13 OCTOBER 2023

Project Title – Back Sound to Lookout Bight, Maintenance Dredging

Amendment No. 0001

TECHNICAL SUMMARY OF CHANGES

1. CHANGES TO SPECIFICATIONS. Attached hereto are [new, revised and deleted] sections to the specifications. Revision mark “***AMENDMENT 0001***” is shown on each revised page.

A. REMOVE & REPLACE SECTION. The following revised section replace like numbered sections. Changes to text are indicated by underline and/or strike-through.

• Section 31 05 19.13 – GEOTEXTILES FOR EARTHWORK o 2.1.1 – GEOTEXTILE TUBE

REMOVE: Each geotextile tube shall be fabricated with flat ends to maintain tight joints between tubes and provide a consistent elevation throughout the project length. Flat ends shall be fabricated with sewn in, end panels that match the cross section of the filled geotextile tube.

REPLACE: ***AMENDMENT 0001*** Each geotextile tube shall be fabricated with flat ends to maintain tight joints between tubes or shall be tapered ends with a minimum of 10 feet of overlap, or per manufacturer recommendations for overlap distance to prevent any loss of material. If flat ends are used they shall be fabricated with sewn in, end panels that match the cross section of the filled geotextile tube. Each geotextile tube shall provide a consistent elevation throughout the project length.

***AMENDMENT 0001***

2. CHANGES TO DRAWINGS. Attached hereto are new and revised drawing sheets. Revised sheets replace like-numbered sheets. The revision tracker in the Title Block of each sheet is populated to reflect the current Amendment Number and issue date.

A. REVISED DRAWINGS (ISSUED). The following revised drawings replace like numbered drawings and are issued herewith:

o NONE

…end of summary…

FY24 Channel t o Back Sound Mai nt enance Dr edgi ng FY24CHNLTOBCKSND

W912PM23B0018 AMDT0001

SECTI ON TABLE OF CONTENTS

DI VI SI ON 31 - EARTHWORK

SECTI ON 31 05 19. 13

GEOTEXTI LES FOR EARTHWORK

02/ 21

PART 1 GENERAL

1. 1 UNI T PRI CES

1. 1. 1 Payment

1. 2 REFERENCES

1. 3 DEFI NI TI ONS

1. 3. 1 GEOTEXTI LE TUBE

1. 3. 2 SCOUR APRON

1. 3. 3 ANCHOR TUBE

1. 3. 4 UV SHROUD

1. 3. 5 FI LL PORT

1. 4 QUALI TY ASSURANCE and MANUFACTURER QUALI FI CATI ONS

1. 5 SUBMI TTALS

1. 6 DELI VERY, STORAGE, AND HANDLI NG

1. 7 FI LL MATERI AL

PART 2 PRODUCTS

2. 1 MATERI ALS

2. 1. 1 GEOTEXTI LE TUBE

2. 1. 2 SCOUR APRON AND ANCHOR GEOTEXTI LE TUBE MATERI AL

PART 3 EXECUTI ON

3. 1 SURFACE PREPARATI ON

3. 2 PLACEMENT OF SCOUR APRON

3. 3 PLACEMENT OF GEOTEXTI LE TUBE

3. 4 I NJECTI ON OF FI LL MATERI AL

3. 5 SEWN SEAMS

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

SECTI ON 31 05 19. 13 Page 1

SECTI ON 31 05 19. 13

GEOTEXTI LES FOR EARTHWORK

02/ 21

PART 1 GENERAL

1. 1 UNI T PRI CES

1. 1. 1 Payment

No separ at e payment wi l l be made f or geot ext i l es, but wi l l be i ncl uded i n t he cont r act pr i ce of bi d i t em " Bi r d I s l and Pl acement ' Sandbag I s l and' " . Thi s wi l l const i t ut e f ul l compensat i on t o t he Cont r act or f or pr ovi di ng al l pl ant , l abor , mat er i al , and equi pment and per f or mi ng al l oper at i ons necessar y f or t he compl et e and sat i sf act or y i nst al l at i on of t he geot ext i l e. The f ol l owi ng i t ems ar e i ncl uded i n t he cont r act pr i ce and wi l l not be count ed a second t i me i n t he pr ocess of det er mi ni ng t he ext ent of geot ext i l e pl aced: Mat er i al and associ at ed equi pment and oper at i on used i n l aps, seams, or ext r a l engt h; secur i ng pi ns and associ at ed mat er i al , equi pment , and oper at i ons; and mat er i al and associ at ed equi pment and oper at i ons used t o pr ovi de cushi oni ng l ayer of sand. No payment wi l l be made f or geot ext i l es r epl aced because of wast e, cont ami nat i on, damage, r epai r , or due t o Cont r act or f aul t or negl i gence.

1. 2 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 wi t hi n t he t ext by t he basi c desi gnat i on onl y.

ASTM I NTERNATI ONAL ( ASTM)

ASTM D4355/ D4355M ( 2014) Det er i or at i on of Geot ext i l es f r om Exposur e t o Li ght , Moi st ur e and Heat i n a Xenon- Ar c Type Appar at us

ASTM D4491/ D4491M ( 2017) St andar d Test Met hods f or Wat er Per meabi l i t y of Geot ext i l es by Per mi t t i v i t y

ASTM D4595 ( 2017) St andar d Test Met hod f or Tensi l e Pr oper t i es of Geot ext i l es by t he Wi de- Wi dt h St r i p Met hod

ASTM D4751 ( 2020) St andar d Test Met hod f or Det er mi ni ng Appar ent Openi ng Si ze of a Geot ext i l e

ASTM D4873/ D4873M ( 2017) St andar d Gui de f or I dent i f i cat i on, St or age, and Handl i ng of Geosynt het i c Rol l s and Sampl es

ASTM D4884/ D4884M ( 2014a) St r engt h of Sewn or Ther mal l y Bonded Seams of Geot ext i l es

ASTM D5199 ( 2012) Measur i ng Nomi nal Thi ckness of Geosynt het i cs

SECTI ON 31 05 19. 13 Page 2

ASTM D5261 ( 2010; R 2018) St andar d Test Met hod f or Measur i ng Mass Per Uni t Ar ea of Geot ext i l es

ASTM D6241 ( 2014) St andar d Test Met hod f or t he St at i c Punct ur e St r engt h of Geot ext i l es and Geot ext i l e- Rel at ed Pr oduct s Usi ng a 50- mm Pr obe

ASTM D6767 ( 2021) St andar d Test Met hod f or Por e Si ze Char act er i st i cs of Geot ext i l es by Capi l l ar y Fl ow Test

ASTM E1886 ( 2019) St andar d Test Met hod f or Per f or mance of Ext er i or Wi ndows, Cur t ai n Wal l s, Door s, and I mpact Pr ot ect i ve Syst ems I mpact ed by Mi ssi l e( s) and Exposed t o Cycl i c Pr essur e Di f f er ent i al s

I NTERNATI ONAL ORGANI ZATI ON FOR STANDARDI ZATI ON ( I SO)

I SO 10319 ( 2015) Geosynt het i cs - Wi de- wi dt h Tensi l e Test

I SO 11058 ( 2019) Geot ext i l es and Geot ext i l e- r el at ed Pr oduct s - Det er mi nat i on of Wat er Per meabi l i t y Char act er i st i cs Nor mal t o t he Pl ane, Wi t hout Load

I SO 12236 ( 2006) Geosynt het i cs - St at i c Punct ur e Test ( CBR Test )

I SO 12956 ( 2019) Geot ext i l es and Geot ext i l e- r el at ed Pr oduct s - Det er mi nat i on of t he Char act er i st i c Openi ng Si ze

BAW FEDERAL WATERWAYS ENGI NEERI NG AND RESEARCH I NSTI TUTE

BAW RPG 3. 11 ( 2021) Gui del i nes f or t est i ng geosynt het i cs f or navi gabl e wat er way const r uct i ons ( RPG) - Resi st ance t o dynami c per f or at i on l oads

1. 3 DEFI NI TI ONS

1. 3. 1 GEOTEXTI LE TUBE

A l ar ge t ube, gr eat er t han 5 f eet i n c i r cumf er ence, f abr i cat ed f r om bi odegr adabl e, or speci al l y engi neer ed t ext i l e i n l engt hs gr eat er t han 20 f eet . Geot ext i l e t ube used i n coast al and r i ver i ne er osi on cont r ol appl i cat i ons ar e most of t en f i l l ed hydr aul i cal l y wi t h s l ur r y of sand and wat er . The geot ext i l e t ube can al so be f i l l ed by a combi nat i on mechani cal and hydr aul i c met hod.

1. 3. 2 SCOUR APRON

An apr on of geot ext i l e desi gned t o pr ot ect t he f oundat i on of t he mai n geot ext i l e t ube f r om t he under mi ni ng ef f ect s of scour . I n coast al and r i ver i ne appl i cat i ons, scour can be pr esent at t he base of t he geot ext i l e

SECTI ON 31 05 19. 13 Page 3 t ube due t o wave and cur r ent act i on. Scour apr ons may be on bot h s i des of t he mai n geot ext i l e t ube, or on onl y one si de. Scour apr ons al so r educe scour caused dur i ng t he hydr aul i c f i l l i ng pr ocess of t he mai n geot ext i l e t ube.

1. 3. 3 ANCHOR TUBE

Scour apr ons ar e t ypi cal l y anchor ed by a smal l Anchor Tube f i l l ed wi t h sand at t he wat er ' s edge.

1. 3. 4 UV SHROUD

Geot ext i l e cover desi gned t o pr ot ect t he t op of t he geot ext i l e t ube.

1. 3. 5 FI LL PORT

Fi l l por t s ar e desi gned openi ngs i n t he t op of t he t ube t hr ough whi ch t he sand sl ur r y i s pumped t o f i l l t he t ube. The f i l l por t s shal l be l ocat ed on ei t her s i de of t he t op sur f ace of t he t ube and cl osed i n accor dance wi t h manuf act ur es r ecommendat i ons. The f i l l por t shal l have t he abi l i t y f or a f l exi bl e s l eeve t hat can be at t ached t o t he dr edge l i ne t o pr event l eakage of s l ur r y t hat i s bei ng pumped i nt o t he t ube.

1. 4 QUALI TY ASSURANCE and MANUFACTURER QUALI FI CATI ONS

Al l pr oduct s shal l be t he st andar d pr oduct of t he manuf act ur er who has been r egul ar l y engaged i n t he desi gn, manuf act ur e and f abr i cat i on of t he geot ext i l e t ube pr oduct s, and whose pr oduct has pr oven r el i abl e i n s i mi l ar ser vi ce f or a mi mi mum of 10 year s. The manuf act ur e must be r esponsi bl e f or t he ent i r e suppl y chai n of t he geot ext i l e t ube and must ext r ude t he f i ber , weave t he engi neer ed t ext i l e, and f abr i cat e t he geot ext i l e t ube. The f aci l i t y must be I SO 9001 cer t i f i ed; t hey must have l abor at or i es t o per f or m al l physi cal t est r equi r ement s i n accor dance wi t h ASTM met hods.

The Manuf act ur er must demonst r at e i t has manuf act ur ed and i nst al l ed a s i mi l ar amount of geot ext i l e t ube uni t s needed f or t he pr oj ect i n t he past 10 year s.

1. 5 SUBMI TTALS

Gover nment appr oval i s r equi r ed f or submi t t al s wi t h a " G" or " S" c l assi f i cat i on. Submi t t al s not havi ng a " G" or " S" c l assi f i cat i on ar e f or Cont r act or Qual i t y Cont r ol appr oval . Submi t t he f ol l owi ng 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 edged Mat er i al Pl acement Pl an; G

SD- 04 Sampl es

Geot ext i l es

Mi ni mum of 30 days pr i or t o t he begi nni ng of i nst al l at i on of t he same t ext i l e

Geot ext i l e Tube; G

SECTI ON 31 05 19. 13 Page 4

SD- 06 Test Repor t s

Geot ext i l es

SD- 07 Cer t i f i cat es

Geot ext i l es

1. 6 DELI VERY, STORAGE, AND HANDLI NG

Del i ver onl y appr oved geot ext i l e r ol l s t o t he pr oj ect s i t e i n a pr ot ect i ve wr ap or cover . Cl ear l y l abel , shi p, st or e, and handl e al l geot ext i l e i n accor dance wi t h ASTM D4873/ D4873M f or easy i dent i f i cat i on. Do not use hooks, t ongs, or ot her shar p i nst r ument s f or handl i ng geot ext i l e.

Geot ext i l e shoul d not be dr agged al ong t he gr ound. Geot ext i l e shal l be unr ol l ed i nt o posi t i on as r ecommended by t he manuf act ur er . Geot ext i l es shal l be st or ed i n ar eas wher e wat er cannot accumul at e, el evat ed of f of t he gr ound and pr ot ect ed f r om condi t i ons t hat wi l l af f ect t he pr oper t i es or per f or mance of t he geot ext i l e. Geot ext i l e shoul d not be exposed t o t emper at ur es i n excess of 150 degr ees f ahr enhei t . Dur at i on of st or age t i me shal l not exceed manuf act ur er s r ecommendat i ons.

1. 7 FI LL MATERI AL

Fi l l mat er i al ut i l i zed t o f i l l geot ext i l e t ube shal l consi st of dr edged mat er i al consi st i ng of f i ne t o coar se sand f r om desi gnat ed bor r ow si t e as shown i n At t achment 1 - VI BRACORE LOGS AND LAB DATA of 35 20 23 DREDGI NG speci f i cat i on. Geot ext i l e t ube shal l be f i l l ed as evenl y as possi bl e unt i l t he desi gn hei ght has been achi eved, and excess wat er shal l be al l owed t o dr ai n adequat el y. Geot ext i l e t ube shal l be pr event ed f r om shi f t i ng or " r ol l i ng" dur i ng t he i nf l at i on pr ocess by secur i ng t he geot ext i l e t ube i n pl ace as r ecommended by t he manuf act ur er . Once t he geot ext i l e t ube has been f i l l ed t o t he r equi r ed hei ght , t he i nj ect i on por t s shal l be c l osed as r ecommended by t he manuf act ur er .

PART 2 PRODUCTS

2. 1 MATERI ALS

2. 1. 1 GEOTEXTI LE TUBE

The geot ext i l e t ube shal l be ei t her f abr i cat ed f r om a bi odegr adabl e t ext i l e manuf act ur ed f r om bur l ap j ut e or s i mi l ar f i br ous mat er i al , or be f abr i cat ed f r om a speci al t y composi t e engi neer ed t ext i l e manuf act ur ed f r om hi gh t enaci t y pol ypr opyl ene yar ns, whi ch ar e woven i nt o a st abl e net wor k such t hat t he yar ns r et ai n t hei r r el at i ve posi t i on.

I nt o t he woven composi t e geot ext i l e shal l be needl ed a l ayer of > 600gr ms/ m2 of hi gh UV r esi st ance f i ber t hat wi l l ent r ap sand and sedi ment .

Geot ext i l e t ube mat er i al shal l be i ner t t o bi ol ogi cal degr adat i on and r esi st ant t o nat ur al l y encount er ed chemi cal s, al kal i s and aci ds and meet t he speci f i cat i ons det ai l ed i n Tabl e 1. I n addi t i on, t he manuf act ur er of t he composi t e t ext i l e t ube must :

a. Pr ovi de EN 12224: 2000 UV Test Met hod dat a t o suppor t t hat t he composi t e t ext i l e has a UV hal f l i f e of 42 year s at t he pr oj ect s i t e.

b. Pr ovi de ASTM E1886 Hur r i cane I mpact Test Met hod dat a t o suppor t t hat t he composi t e t ext i l e has wi t hst ood t hr ee di r ect i mpact s at 64 mph at

SECTI ON 31 05 19. 13 Page 5 t he same l ocat i on on t he same sur f ace of t he geot ext i l e wi t hout r upt ur e.

c. Pr ovi de BAW Sl ur r y Abr asi on Test Met hod dat a t o suppor t 90% aver age st r engt h r et ent i on af t er 80, 000 r evol ut i ons.

Geot ext i l e t ube shal l be f abr i cat ed by sewi ng t oget her mi l l wi dt hs t o f or m a mi ni mum t ubul ar shape of 15 f t . c i r cumf er ence and 50 f t . l ong ( consul t manuf act ur er t o det er mi ne sui t abl e s i ze) .

Each geot ext i l e t ube shal l be f abr i cat ed wi t h one or mor e f i l l i ng por t s l ocat ed no mor e t han 50 f eet al ong t he t op of cent er l i ne of t he geot ext i l e t ube, or per manuf act ur e r ecommendat i on. The f i l l i ng por t i s compr i sed of appr oxi mat el y 1. 5" t hi ck ( i nsi de and out si de di amet er ) f l ange r i ngs wi t h cel l ul ar gr i ppi ng sur f ace t hat sandwi ch t he woven engi neer ed t ext i l e bet ween 1/ 8" t hi ck r ubber gasket s and secur ed wi t h 3/ 4" bol t s. For bi odegr adabl e t ubes pr ovi de one or mor e sewn i n f i l l i ng por t s l ocat ed at no mor e t han 50 f eet al ong t he t op of cent er l i ne of t he geot ext i l e t ube.

I n addi t i on t o t he f l ange or sewn i n, t he f i l l i ng por t shal l i ncl ude a f abr i c s l eeve t hat may be secur ed ar ound t he f eed l i ne t o pr event l eakage.

Pr essur e r el i ef por t s shal l be l ocat ed no mor e t han 10 f eet f r om each end of geot ext i l e t ube, or as r ecommended by t he manuf act ur e.

Fabr i c and f act or y sewn seams ut i l i zed shal l meet or exceed t he val ues i n Tabl e 1.

* * * AMENDMENT 0001* * * Each geot ext i l e t ube shal l be f abr i cat ed wi t h f l at ends t o mai nt ai n t i ght j oi nt s bet ween t ubes or shal l be t aper ed ends wi t h a mi ni mum of 10 f eet of over l ap, or per manuf act ur er r ecommendat i ons f or over l ap di st ance t o pr event any l oss of mat er i al . Each geot ext i l e t ube shal l pr ovi de a consi st ent el evat i on t hr oughout t he pr oj ect l engt h. I f f l at ends ar e used t hey shal l be f abr i cat ed wi t h sewn i n, end panel s t hat mat ch t he cr oss sect i on of t he f i l l ed geot ext i l e t ube. * * * AMENDMENT 0001* * *

TABLE 1

MI NI MUM PHYSI CAL REQUI REMENTS FOR DRAI NAGE GEOTEXTI LE

MECHANI CAL PROPERTY UNI TS ACCEPTABLE VALUES TEST METHOD

Tensi l e St r engt h l bs/ i n 310 - 360 I SO 10319

SEAM STRENGTH l bs/ i n 286 I SO 10321

PUNCTURE St r engt h l b 1821 I SO 12236

Por t St r engt h l bs/ i n 1356 ASTM D6241

Hydr aul i c Pr oper t i es

Por e Si ze ( mm) 0. 14 I SO 12956

Wat er PERMEABI LI TY gpm/ f t 2 14. 5 I SO 11058

Dur abi l i t y Pr oper t i es

SECTI ON 31 05 19. 13 Page 6

I mpact Ener gy f t - l bs 1233 ASTM E1886

Abr asi on Resi st ance % 93 BAW RPG 3. 11

UV Resi st ance % 90 ASTM D4355/ D4355M

Physi cal Pr oper t i es

Mass/ Uni t Ar ea oz/ yd2 35 ASTM D5261

Col or Tan

2. 1. 2 SCOUR APRON AND ANCHOR GEOTEXTI LE TUBE MATERI AL

Scour apr on and anchor t ubes shal l be composed of hi ght enaci t y pol ypr opyl ene yar ns, whi ch ar e woven i nt o a st abl e net wor k such t hat t he year ns r et ai n t hei r r el at i ve posi t i on. Scour Apr on and Anchor Tube mat er i al shal l be i ner t t o bi ol ogi cal degr adat i on and r esi st ant t o nat ur al l y encount er ed chemi cal s, al kal i s and aci ds and meet t he speci f i cat i ons det ai l ed i n Tabl e 2.

Scour apr on shal l be f abr i cat ed by sewi ng t oget her mul t i pl e mi l l wi dt hs of t ext i l e t o ext end 5 f eet past geot ext i l e di mensi ons, or as r ecommended by manuf act ur er f or sui t abl e s i ze.

TABLE 2

MI NI MUM PHYSI CAL REQUI REMENTS FOR SCOUR APRON, AND ANCHOR TUBE

MECHANI CAL PROPERTY UNI TS ACCEPTABLE VALUES TEST METHOD

Tensi l e St r engt h l bs/ i n 450 - 625 ASTM D4595

Tensi l e El ongat i on % 20 ASTM D4595

Seam St r engt h l bs/ i n 400 ASTM D4884/ D4884M

Punct ur e St r engt h l b 2000 ASTM D6241

Appar ent Openi ng Si ze

( AOS)

mm ( U. S. Si eve) 0. 43 ( 40) ASTM D4751

Wat er Fl ow Rat e gpm/ f t 20 ASTM D4491/ D4491M

UV Resi st ance ( % st r engt h r et ai ned af t er 500 hr s)

% 80 ASTM D4355/ D4355M

Fi l t r at i on Pr oper t i es

Por e Si ze Di st r i but i on( O

50) Mi cr on 115 ASTM D6767

SECTI ON 31 05 19. 13 Page 7

Por e Si ze Di st r i but i on( O

95) Mi cr on 368 ASTM D6767

Physi cal Pr oper t i es

Mass/ Uni t Ar ea oz/ yd 17. 3 ASTM D5261

Thi ckness mm ( mi l s) 1. 8 ( 70) ASTM D5199

PART 3 EXECUTI ON

3. 1 SURFACE PREPARATI ON

Pr epar e sur f ace, on whi ch t he geot ext i l e and geot ext i l e t ube wi l l be pl aced, shal l be const r uct ed t o manuf act or s r ecommendat i on. Al l obst r uct i ons, whi ch coul d damage Scour Apr on or geot ext i l e t ube shal l be r emoved. Pr i or t o pl acement of t he Scour Apr on and geot ext i l e t ube, t he pr epar ed base shal l be i nspect ed and appr oved by t he Cont r act i ng Of f i cer , or hi s/ her r epr esent at i ve.

3. 2 PLACEMENT OF SCOUR APRON

Pl ace Scour Apr on i n accor dance wi t h t he manuf act ur es r ecommendat i on. The ends of each apr on shal l be over l apped a mi ni mum of 5 f eet , or per manuf act ur es r ecommendat i on.

3. 3 PLACEMENT OF GEOTEXTI LE TUBE

Pl ace geot ext i l e t ube wi t hi n t he l i mi t s shown on t he cont r act dr awi ngs. No por t i on of t he t ube shal l be f i l l ed unt i l t he ent i r e t ube segment has been f ul l y anchor ed t o t he f oundat i on al ong t he cor r ect al i gnment . Means of assur i ng t hat t he t ube ar e pr oper l y al i gned and anchor ed shal l be i ncor por at ed i nt o t he pl acement met hodol ogy pr esent ed i n t he " Dr edged Mat er i al Pl acement Pl an" .

Bef or e geot ext i l e t ubes ar e f i l l ed, adj acent t ubes shal l be but t ed or over l apped t oget her so t hat t her e ar e no gaps bet ween t he t ubes i n accor dance wi t h manuf act ur er r ecommendat i ons. Beneat h t he geot ext i l e t ubes, t he ends of each Scour Apr on, i f r equi r ed by manuf act ur e, shal l be over l apped a mi ni mum of 5 f eet or per manuf act ur e r ecommendat i ons.

3. 4 I NJECTI ON OF FI LL MATERI AL

Fol l owi ng t he apr on and geot ext i l e t ube pl acement , f i l l wi t h dr edged mat er i al f r om desi gnat ed ar ea i n accor dance wi t h t he cont r act dr awi ngs.

Any excess di schar ge shal l be di r ect ed away f r om t he geot ext i l e t ube and subaquat i c veget at i on and i nt o desi gnat ed ar ea.

a. The dr edge di schar ge pi pe may need t o ut i l i ze r educer s t o meet manuf act ur e por t s i ze and r ecommendat i ons. Car e shoul d be t aken not t o over f i l l or over pr essur i ze t he " anchor t ube" , i f appl i cabl e, t hat i s i ncor por at ed i nt o t he Scour Apr on.

b. The dr edge di schar ge pi pe or l i ne shal l be f r ee of pr ot r usi ons t hat coul d damage t he Scour Apr on or t ube. Excessi ve movement of t he dr edge

SECTI ON 31 05 19. 13 Page 8 di schar ge pi pe dur i ng f i l l i ng can r esul t i n damage. The geot ext i l e t ube manuf act ur e shoul d be consul t ed as t o t he best met hod t o af f i x t he dr edge di schar ge pi pe t o f i l l t he por t .

c. Upon f i l l i ng t he geot ext i l e t ube, t he f i l l por t s l eeves shal l be t i ed of f and pushed t hr ough t he mechani cal por t or sewn por t t o t he i nsi de of t he t ube. For composi t e t ubes t he por t cover pl at e shoul d be at t ached wi t h st ai nl ess st eel scr ews, or i n accor dance wi t h manuf act ur e r ecommendat i ons. For bi odegr adabl e t ubes t he por t shal l be sewn shut i n accor dance wi t h manuf act ur er r ecommendat i ons.

The geot ext i l e t ube shal l be compl et el y f i l l ed t o i t s desi gn hei ght . The desi r ed hei ght i s gener al l y no mor e t han 50% of t he t ube wi dt h or as speci f i ed by t he manuf act ur er r ecommendat i ons.

Once t he t ubes have been pr oper l y i nst al l ed, t he ar ea behi nd t hem i s r eady t o be backf i l l ed t o t he l i nes and gr ade i ndi cat ed i n t he Dr edged Mat er i al Pl acement Pl an.

3. 5 SEWN SEAMS

Hi gh st r engt h t hr ead shoul d be used so t hat seam t est conf or ms t o ASTM D4884/ D4884M. Pr ovi de t hr ead meet i ng t he chemi cal , ul t r avi ol et , and physi cal r equi r ement s of t he geot ext i l e, and pr ovi de col or di f f er ent f r om t hat of t he geot ext i l e. Pr ovi de seam st r engt h equal t o t he st r engt h r equi r ed f or t he geot ext i l e i n t he di r ect i on acr oss t he seam. Over l appi ng J- t ype seams ar e pr ef er abl e over pr ayer - t ype seams as t he over l appi ng geot ext i l e r educes t he chance of openi ngs t o occur at t he seam. Use doubl e sewi ng, speci al l y f or f i el d seams, t o pr ovi de a saf et y f act or agai nst undet ect ed mi ssed st i t ches.

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SECTI ON 31 05 19. 13 Page 9