In fifthly M t r Tot FO-2-1 21* 1906

Conoco Inc. Att Mrt too| Kr. P. U C 1 M * O 350C OtCMlU rrWo Mow trlooos. Lowttlons 70114

GOK

t» oodo to your I o l t U l Plan of Expl or «t loo sod Envtronnouisl . rocotvod Novortx.i 14, 19*6, for l u m OCf-C 69(9 ond 6984, Blocks

. ooo1 929* rospoctivoly, Mississippi Conyoo Aro*. ThU plon loc Ioooo tM octtvl t lo* proposod for Hollo A, b. ond C Is Block 616 sod Vails A 9 lo Block 929.

13. 1979, ood oor lottor y dotorolnod to bo

Io oco»*9oooo vltk 30 CFK 250.34, rovlsod jotoo Jonoory 29, 1979, tklo plan i» karaf Is oo« ootoy conoldorod for approval.

Your plan cootrol motor lo N-2604 ood should oo roforuncod lo yoor

lata ••K

Ication ond cfrrsopoodsnrt log thfs plan.

SI nco t oly yoors*

(Orip. Sgd.) A. Donald Z

0. 1. Bourgeois J m Regional Soponrlsor

Flald Operation

beet Loaso OCS-G 6963 (OPS-3-2) (FILE ROOM) / Looso OCS-G 6964 (OPS-3-2) (FILE ROOM) j OPS-3-4 w/Publlc Info. Copy of tho plon sod ER (PUBLIC RECORDS)

ADGooortiMMtlL/20/66 Conoco Inc . OCS-G 6963 OFetaf

9*916 lirVRBl

NOV 8 5 886

(conoco)

PnM»OjO»6l, 3600 General OWGMJN* Driwe H*» OrlMna, LA 701M (9041 360 3000

"ov. r 7, 1986

kegional Supervisor Off lc t for Rulee and Production RP-2-1 Minerals Manageaent Sarvica 1420 South Clearview Parkway Nev Orleans, Louiaiana 70123

Plaa of Exploration, Mlooiooippi Canyon Blocks 865, OCS-C 6983 ood 929. 0C8-C 6884

Conoco Ine. submits Cho enclosed Plan of Exploration for Mississippi Canyon Blocka 885 and 929. Thla plan outlines oor Intant to d r i l l seven •xpl oratory wol la ln tho blocka.

Attachad ara tha required five (5) proprietary cop lee and tha foor (4) public inforaation coplea of tha plan aach Including an environmental raport ond a coaatal tona cooolutancy cert i f icat ion. I f additional information lo required, pleaee c a l l .

P. L . Blaeae Environmental Analyst

PLB3: Bac.

CONOCO IHC.

PLAN OF EXPLORATION

PUBLIC INFORMATION COPT

I . Doner Ipt lon of Proponed Work

A. Thrtt exploratory walls srs banned for Nlaslsslppl Canyon Block MS, OCS-C 6983.

Wall a. Swrfoce and Botton Hols Location: PTVD:

Motor Dopth:

Woll 8 Surf nea snd Bot too) Bole Location: PTVD:

Woter Depth:

Well C Surfece end Bottom Role Location: PTVD: Wnter Depth: B. Poor exploratory wells sre planned for Mleeleelppl Cony or hlock

929, OCS-C 6964. Well A Surfece end Bottom Hole Location: PTVD:

Wnter Depth:

Well 8 Surfece end Bottom Hole Location: PTVD:

Voter Depth:

Well C Sor fee a end Bottom Hole Location: PTVD:

Voter Depth:

Well D Surfece end Bottom Hole Lc cat ior.: PTVD: Voter Depth: '

I I . Dri l imn Schedule The HC 929 A well le expected to be the f i r s t well dril led under this POE. Tlie order ln which the other welle w i l l ho dri l led I s pending et thie tine. The d r i l l i n g of the A well lo tentotlvely scheduled for April 1, 1987. Pending the reeulte of thet wel l , the other welle could he drilled lmnedlstely nfter thie f i r s t well or d r i l l i ng could he poetponed until e future dete ln order to explore other recently scqulred trecte.

I I I . Deecription of Drilling, V f — 1

Thn proposed vei ls v i l l be dril led bp e semi-submersible dr i l l ing vessel . The exact vessel has not been chosen nt this tlae. Rig information v i l l be suppl led vith our APD.

I V . Invlronnentel end Snfety Ssfegoerds

Daring drilling operations, appropriate requirements of OCS Order Ro. 2 for gas detecting equipment to monitor nod returns end for BOP equipment to na Int a in v e i l control v i l l be aet. The rig used v i l l be equipped vith curbing end drip pone sround equipment ae neceeaary to prevent pollution and operations v i l l be conducted under en approved C r i t l c e l Operations and Curtailment Plan. The r ig v i l l have adequate fire-fighting equipment and v i l l be bound by contrect to operate in compliance vith appropriate U.S. Coaat Onard regulations, a l l diachargee froa the rigs v i l l be ln compliance vith the U. S. Envlronnentsl Protection Agency (EPA) Rational Pollutant Discharge Elimination Syetern (NPDES) Permit No. GMG280000.

V. O i l Spil l Prevention nnd Reeponee

Pollution epill prevention v i l l be accomplished primarily by compliance v i t h the design, equipnent end operationa requirementa of OCS Orders 2, 5 , 7 and 8. Procedures and guidelines for a p i l l reporting ln nccordsnce with applicable regulatlona nre provided ln our Contingency Plan for Accidental Diachargee for Oi l or Hasardoue Subetencea. This plan satisfied a l l requirements of OCS Ordsr 7 for sn Oil Sp i l l Contingency Plan. The plan provides both advance preparation and action proceduree for a Divisional Task Force and an Operational Response Teen. Raaourcaa nade eveileble include Clean Gulf Aaaoclatee equipment, coapany nnd other industry-owned equipnent and that of eeveral local o i l a p i l l clean-up contractors. Pertinent CGA equipment including several fast response units nre located at Venice, Grand Tola, Houma end Intracoaatal City, Loulalana. A faat response unit een be deployed end on the ecene vithln 24 hours.

V I . Location Plata

Included ea Attachnent Ro. 1 are location plate showing tha location of the propoeed v a l l a .

V I I . Projected Air Enleslon

Attachnent Ro. 2 contains the estimated a i r emissions associated vith dri l l ing eech v e i l .

V I I I . Mud Conponente end Additives

Included as Attachnent No. 3 la a detailed Hat of nud components and additives which nay be handled ln dr i l l ing operations.

I X . Coologlcal and Geophyaical Information

Included ee Attachment Ko. 4 nre a seismic nop and e shel lov haeerde survey report. Thie infonnation io considered proprietary and haa b*en deleted froa the public information coplea.

X. Conoietency Certification

Included ee Attachment Ro. 5 ia tha Cooalatency Certification aa required hy the Coest s l Zone Management Progran of tha Stete of Louieiana.

XX. Bnvlroonentol Report

Included ea Attachnent Ko. 6 io the tnvironnental Reporl regerdlng oar propoeed actlvitlea.

ATTACHMENT HO. 1

BUQ au aii * * * *

I m **S 605

COtOCO IMC. OCS 0-6983 • nk. aas

i

arid

MS '

928 929 925 930

PROPOSED LOCATION FLAT

Mississippi Csryjon Bloek 884 Aree Mi ssissi rpl Conjon Block 865

OCS 0- 6983 belle Mo."A*

Scole: 1--3000*

Conoco Inc. I No.

0*0 |

*u ab ;

l at* «5 .105 CONOCO INC. OCS G-6983 • Blk. 685

I

Orid

Mt *

929 92?

PMUPOSLD LOCATION PUT

Hissisii ppl Canyon Block 885 Aroa Mississippi Canyon Blook 865

OCS C- 6983 walls No. "B"

Scalo: 1--3000'

- Aoo>,.sanB 6/23/86 fi&-

Conoco lnc, INo.

8L0 aa 885

CONOCO INC. OCS C-6983 Blk. 885

eg

6*5 666

i

Grid

926 c.29 V2« 93C

HwrVSLD JLCCATIC:: PL'.T

Mfs l r .s ipp i Canyon Block 825 Aroa Mississippi Canyon Block PP5

OCS C- 6983 ^ i i s apj ••;•«

Scale: 1-OWO'

a s s e s s re ^ / ? 1 / n 6 fa*

Conoco Inc. I No.

I- ~BBJ ea 885

CONOCO INC. OCS G-6903 Blk. 885

eg 885

• C "

Grid

O

*U*

888

928 929 V2* 930

PHUPOSLD LOCATION FL/.T

M? sis sippi Canjor. Block 885 Are* Mississippi Canyo; i Block 885

OCS C- 6983 Wells .k>. A-C

Scale: 1--3000*

Aep'o»»e

Conoco Inc. INa

«e5 m 826 92* ~92T

CO:JCKX i re . ocs c-6934 Blk.929

Grid

I'ROPOSID Loanor: PL.T

K i e e l e s i p p i Corgron Block 929 Are* Mississippi Canyon hloek 929

OCS-G 6964 Well No,"A"

Scoloil«-300C»

»»s«s —e M

Conoco Inc. INO.*M/*

m k | m ^5 826 ^928 19 929~ W t

ocr xxx* ire. OCS C-6934 BUt.929

Grid

>72 973 9"3 974

•9JDJ9JB LOCATIOR PL.T

Ki»ii»sippi Canyon Block 929 Aree Kisei.sippi Canyon llocTT929 "

OCS-G 69S4 Welli No. -3"

Scolotl«-3000*

PLB

Conoco Inc. lNo.*/*/* *»f

928 R85 365 TO 92? " B T #

cc xxx tre. OCS G-6934 BUc.929 .

1 0

Grid

636

«B" O

972 973 973 974

PROPOSED LOCATION P L . T

Kitt5.ttippl Can/on Block 929 Ar** KiMitsippl Canyon block 929

OCS-0 690. Wellt Ko."C'

Scalo :1 "-3000'

FLB

Conoco Inc. iNo.*/**/*6 •**

«5 92T

oo:xxx> IT:C. OCS C-6934 BLk.929

Grid

•D-O

•72 973 773 974

PROPOSED LOCAncr: P L . T

^ • • i t t i p r l Carbon Block Trn Klotlttipfd Canyon block 929

OCS-C 4984 Wells Mo. -D"

t««lctl"-300C*

»H'it»i PLB

Conoco Inc. I NO.*M/* <»f

«*5 J92* 92*

COIJOOC IKC. • Ii

972 973

3*5 ~9~5T 97cH

ocs c-6934 BTc.929

»C"©

1

Grid

"I

973

PHOPOSLD LOCAnCTJ PUT

8*6

974

Conoco Inc.

Mississippi Con/on Block 92? Arre Hi ssissippi Con/on Llock 929

OCS-0 69CL

o»rs—) *LB

I No.*/*/* p*f

ATTACHMENT HO. 2

PROJECTED AIR F ISSIONS HC MS WELL A

P r i l l i n g RU Emissions

P o l l o t a n f lbs/Dey Total Tono/73 Daya

co— -TTTT —urr VSP R/A R/A RO, 21.6 . f l HO; 318.13 11.93 wot 10.67 .40

Thn above figures ere beeod upon 75 rig days end dr i l l ing •. .-f of nev hole. Emission estimates ore boeed upon EPA'e publicetlon AP-42 ond PB-27226B entitled "Atmoapheric Poleelone froo Offehore Oil end Ooo Development end Produetion'' - June 1977.

Othor Knlealona

Pollotonte Lbs/Doy Totel Tono/75 Dayi c o - W TTT^—

0.75 .03 • O , 0.54 .03

56.47 2.12 20.76 .78

The obove figures vere calculated ee per EPA Publicetlon AP-42 end includes emisalone releted to helicopter lend ing/takeoff eye lee ond boot ectivity including fuel loading ond transit loss end emissions while running, loading ond standing by.

Totol Enlaelons

Pollotonte Total Tone/75 Daya

as rft TSP .03 SO, .84 HO; 14.05 VOC 1.18

NOTE; Dlatence fron neareot atate lend le approximately 70 etetute miles.

PROJECTED AIR EMISSIONS MC 885 WELL •

D r i l l i n g Klg Emlaelono

Pol lut—ti Lbe/Doy Total Tons/75 Days

ar* ji.ii —ninr T8P R/A R/A 80, 17.07 .84 •Oi 251.23 9.42 VOC 8.27 .31

Tho abovt figures ars based upon 75 r ig daya and dri l l ing of nov holo. Emission est lme tee are based upon EPA's publication AP-42 ond PB-27226B entitled "Atnoophorlc Emission* fron Offshors Oil and Cas Development and Production" - Juna 1977.

Othor Eni ae looa

Pollutenta Lbe/Day Totel Tono/73 Pare

co - 46.54 — n r ^ TSP 0.75 .03 80. 0.54 .03

56.47 2.12 20.76 .75

Tho above flguree vere calculated ee per EPA Publication AP-42 and Includes onleelone releted to hollcoptor landing/takeoff cyclee end boot activity including fuel loading and tranelt loaa and emissions while running, loading ond standing by.

Totol Emissions

Pollutsnts Totel Tone/75 Deye CO- 57R TSP .03 80, .67 ROI 11.34 vof 1.06

ROTE: Distance fron ncareet atate land la approximately 70 etatute n l les .

PROJECTED AIR EMISSIONS MC 885 WELL C

Drilling, Rig Emissions

Pollotonte Lbs /Day Total Tooo/75 Daya c o — 46.67 — n r i r TSP N/ \ N/A SO, 21.60 .81 NO; 318.17 11.93 TOC 10.67 .40

Tha abov a figures ara baaad upon 75 rig daya and dri l l ing of ho l a . Eo las lon .-st lua tea oro baaad upon EPA'a publication AP-42 aad PB-27226B entitled "Atmospheric Emissions froa Offahora Oil and Gog Development and Prodoction" - Juna 1977.

Othor Eoiaalona

Pollutants Lbs/Day Total Tone/75 Daya

cc - nior —rrn TSP 0.75 .03 SO, 0.54 .03

56.47 2.12 ?0.76 .75

Tho above figures vara calculated ae per EPA Publicetlon AP-42 end includes eolealone related to helicopter landing/takeoff cyclee end boat activity including fuel loading and transit loss end emi sa iona while running, loading and standing by.

Totol Eolealone

Pollotanta Totel Tone/75 Daya c d - 5721 L -TSP .03 SO, .84

14.05 1.15

NOTE; Distance froo nearaet etete lend le epproxlaately 70 statute miles.

PROJECTED AIR EMISSIONS MC 929 WELL A

P r i H i n t E U Enloolooo

Polluteati Lbl/Piy Total Tons/75 Daya

co— -ior — r r r — L -TSP R/A H/A tO, 16.00 .60

236.7 8.95 8.0 .30 3

T*>a above figures ara baaed upon 73 rig dayc and dri l l ing j f naw hole. Enlaalon estimates ara baaad upon EPA'a publication AP-42 and PB-27226B entitled "Atmoapheric Emlsslone from Offahora 011 aod Oaa Dove l e y ent and Production" - June 1977.

Othor Eniaalona

Pollutants Lba/Doy Total Tone/75 Dora

8b— w —rn- 1—™-T8P 0.73 .03 80, 0.54 .03 NO; 56.47 2.12 VOC 20.76 .78

Tho above figurea were calculated aa par IPA Publication AP-42 ond Includea enieeIons releted to helicopter lending/takeoff cpciee and boat activity including foal leading end tranelt looa ood emissions while running, loading ond etending by.

Total Emissions

Pollutants Total Tone/75 Daya

co— TTI L -T8P .03 80, .63

11.07 1.06

MOTE: Distsnce froo nearest stste lend l s approximately 72 atatute miles.

PROJECTED AIR EMISSIONS MC 929 WELL B

Drilling, Rig Emissions

Pollutants Lba/Day Total Tono/75 Djyj

HJ 33.5A' ran TBT H/A H/A

15.47 .31 227.50 8.53

7.47 .28 3 Tho abov* figures oro based upon 75 r ig daps snd dri l l ing of nav helo. Enission est lata tea srs based upon EPA's publication AP-42 ond P8-27226B entitled "Atmospheric Emissions froo Offehore Oil end Gog Development end Production" - June 1977.

Other Eoleelone

Pollutente Lb a/Day Total Tona/75 Daya C0~~ 40.34 HIT TBP 0.75 .03

0.34 .03 56.47 2.12 20.76 .78 3

The above flguree were calculated ae por EPA Publicetlon AP-42 end includea eoissions releted to helicopter lend lng/takeoff cycles and boat sctivity Including fuel loading end transit loeo end eoleelone while running, loading aod standing bp.

Total Eoleelone

Pollutaota Total Tona/75 Daya CO- YM TIP .03

.61 10.65

1.06 3 NOTE; Distsnce from nesrest ststs lend Is approximately 72 atatute mllea.

PROJECTED AIR EMISSIONS MC 929 WELL C

D r i l l i n g Rl i Emissions

Pollotonte Lbo/Dcy Total Tong/73 Day

co - "ISTTT n*ir *~

TSP N/A N/A 27.33 .66

261.37 9.8 8.80 .33 S

The above figures ere based upon 75 rig daya end dri l l ing ' of nev hole. Enission estimates ere baaed upon EPA'e publicetlon AP-42 end PB-27226B ent i t led "Atmospheric Emissions fron Offehore Oi l and Cae Developnent and Production" - June 1977.

Other Emissions

Pollutants Lbs/Day Totel Tono/73 Daya a 46.34 — T 3 r ^ TSP 0.75 .0? SO, 0.54 .03 NOf 5«».47 2.12 VOC 20. U .76

The obove figures vere c a l f emissions related to h e . i Including fuel loading er.u >.. u* . xoss ond standing by.

Totol Eoleelone

?ublication AP-42 and includea -f cycles end boat activity

and emissions while running, loading

Pollutants Total Tona/75 Daya 55 OS TSP .03 SO, .69 Noj 11.92 VOC 1.09

NOTE; Distance fron nearest state land la approximately 72 atatute n l l e s .

PROJECTED AIR EMISSIONS MC 929 WELL D

P r i l l i n g Kit Emission*

Pollut-roti Lba/Dey Total Tono/75 Day S> 34.94 T3T^ TSP R/A H/A SO, 16.00 .60 HO; 238.7 8.95 VOf 8.0 .30

Tha abov* figure* ara baaad upon 75 rig daya and dri l l ing ' of now hoi*. Eoleelou aatioataa ara baaod upon EPA'o publication AP- .2 and PB-27226B entitled "Atmospheric Eaisaiona froo Offehore Oil end Gee Developaent and Production" - June 1977.

Other Eoleelone

Pollotonte Lbe/Day Total Tone/75 Daye S5— 40. W T J T ^ TSP 0.75 .03 SO, 0.54 .03 HO; 56.47 2.12 VOC 20.76 .78

The above figures were celculeted ee per EPA Publicetlon AP-42 and Includes eoleelone releted to helicopter lending/takeoff cycles end boat activity Including fuel loading and transit loae and eoleelone while running* loading and atending by.

Total Eoleelone

Pollotonte Totel Tone/75 Daya

—ob— nit— TSP .03 SO, .63 RO; 11.07 TOt 1.08

HOTEi Dlatence froa nooroot atete land la approximately 72 etetute allea.

ATTACHMENT RO. 3

I k * f o l l o v l n g l a • l i f t o f c r f l l l H a n * c a a a l e t t a a H a l t e M I t t a * * t k a t aay k* u« *d o n . l t * l a t k a Cu l f a f H e * ! * * . k t a a k a r t a a f any o f t h . . . a j a t a r l a l a v i l l ka l a camy l taaca w i l d f . f . CPA Canara l r a r a l t Ho.

iJMBflM A l a a l a a a t t o a r a t a A laa laaa) S a l t * r a a c t a * v t t k H e a r t * A c t *

k a r l a a i a l f a t *

t a a t a n t t l V y o s l n * t o n t a a l t a

t l c a r k a a a t e a f t a * a l o * i u a H u r t a m i

N l a a r a l a l l aaj* * 4 * l t t * *

N U t u r a a f C a l c l a a A l a a l a a t e * * * 4 l l l l c a t a a

l l f a — I f a — t a (CL/CLS. M a t t a r * of Ca l c l aa A l a a l a a t a a aa* 111 I c a t aa Q - B r a a l n t a a r a o n o , a t e . )

C lay t a t • • • f a l t e

CMC t o * l u a C a r k a a r a a t k y l C a l l a l a w *

k r i a y a w r a l y e a t a a l * C a l l a l a w

CCL r a t a a a l u a C h l a r l * a

L l a a l t a L l a a l k *

U M c a l c l a a a y * r a a t * a

LTT N a e - t r a l c N l a a r a l M l

k l c a n a k e e (11 U t at aa)

r a l y a a t a a l c C e l l e l a e e

Caraahy t f ra t * " a l y a e r (wa ta r a a l a k l a )

Groan* Walaat M w l l e

A a a l l a a aa* * * * 1 g raaea , c o o t a i a a a

C a - y e l y a a r * f • t a l f a a a t a * L l g a l t * aa * a f k a a a l r a t v j a l * a k y * a

a i r k l a v a a a a k a l t . c a l c l u a k y « r e a l « * a a * fatty acta*

ia*taa Cklerl**

•a l t aal u t ta fa l f l ta Clay

Btarcfc r r * f * l * t l * l « * t I t a rch

•meter

ENVIRONMENTAL REPORT FOR

PLAN OF EXPLORATION

CONOCO, INC.

MISSISSIPPI CANYON AREA

Lease OCS-Q 6083

Block 885

Wells A-C

enc

Lease C C S - " '

Block 920 Wells A-D

July 29. 1986

P r e p a r e d By

C. H. FENSTERMAKER & ASSOCIATES, INC.

APWflS6rjf^CC*WUTI0N

I CMI oimintm

! » > e t n W » i l l I

ENVIRONMENTAL REPORT FOR

PLAN OF EXPLORATION

MISSISSIPPI CANYON AREA

llock 885

Prepared For

Conocc Inc.

Prepared By

. H. Fenstermaker 8 Associates P.O. BOX 52106

Lafayet te, Louisiana /0505

July 18, 1986

Coapany Contact

N. H. Ibarra / Nr. P. L. Bisese Conoco Inc.

3500 General DeGaulle Drive Raw Orl cans, LA 70114

504/363-4390

Uate OCS-G-6983 MELL NOS. A - C

Block 929 Lease OCS-G-6984 WELL NOS. A - D

TABLE OF CONTENTS

Section »tot

1.0 DESCRIPTION OF PROPOSED ACTION 1

2.0 DESCRIPTION OF AFFECTED ENVIRONMENT AND IMPACTS . 6

3.0 UNAVOIDABLE ADVERSE IMPACTS 14

4.0 STATEMENTS OF GUARANTEE 16

S.O CONSISTENCY CERTIFICATION 17

f.O REFERENCES 18

11

LIST OF TABLES

Table Page Muatbor

1 wildlife Refuges and Preserves 10

LIST OF ILLUSTRATIONS

Figure Nuraber

Location Map of Blocks 885 and 929, Mississippi Canyon Aroa 4

Proposed Surface Locations of Wells A - c Located 1n Block 885, and Wells A - D Located In Block 929, Mississippi Canyon Aroa 5

SECTION 1.0 DESCRIPTION Of PROPOSEO ACTION

A. TRANSPORTATION MODES

Proposed exploration activities for crude oil and/or noturol oas In Mississippi Canyon Area, Block 885, will Involve drilling three (3) wells froa l typical sem1-subners1ble drilling rig (contractor to bo determined) In water depths ranging froa 2065' to 2140'. Four (4) wells will bo drilltd In llock 929 also froa a typical senl-submersible drilling rig In wattr depths ranging froa 2)70' to 2280*. Operations at thtst walls will bt serviced] by aarine vessels and helicopters froa Conoco's Grand Isle and/or Venice Shore Bases. A description of tho type and sequence of activities to be conducted, the drilling vessel, and travel modes, routes and frequencies 1s provided 1n the Plan of Exploration (POE).

B. SUPPORT BASES AND PERSONNEL REQUIREMENTS

A discussion of the onshore support bases to be used for tha proposed activity 1s found In tho POE.

Personnel required In the exploration phase art outlined below:

1. Onshore Eaployaent. The Grand Isle and Venice areas are established centers for drilling and producing operations, both onshore and offshore. Accordingly, It Is expected that personnel required for routine onshore activities will be readily available. The proposed exploration activity Is not expected to create any requireaents for .iew or additional workers In the Grand Isle-Yen 1c area.

?. Offshort Eaaloyaent. Tht seal-subaerslbit rig will eapUy four arming crewF votei1i:g appr ori ewt-ly 86 people Two cr»is ar* on tht rig at ail times, tach vrrkinc a 12-hour/day shift on a 7-days-on and >-days-off schedule. Each crew aay consi it of ont toolpusher, an assistant driller, a derrickman, a audmsn, throe noormen, a crane operator, four roustabouts, a ballast controller, a cleaner/ painter, a aotor aan, a storekeeper, n electrician and a mechanic. A senior mechanic/electrlcian, a barge engineer, a subsea welder end a medic art asslgnau to tht

1

rig and are available as needed. A Conoco drilling foreman will be on the rig at all t ints. Fourteen cooks and gilley hands ore also assigned to the r ig , seven of which are on the rig at any given ties. In addition to the rig crew, support personnel such as aud specialists, ceaent technicians, logging specialists, casing crews, directional drilling surveyors, etc. , will be contracted as needed. It 1s estimated that approximately 801 of the rig crew and support personnel commute froa outside the Louisiana coastal zone.

Each of tho three boats that will be In operation employs a 7-man crew consisting of a captain, a aate, an engineer, an able-bodied seaman, an oiler, a deckhand, and a cook. The crew are mainly on a 7-days-on and 7-days-off work schedule. Boat personnel reside predominantly Inside the Louisiana coastal zone.

C. NEU SUPPORT FACILITIES

As described earlier, existing onshore facilities at Grand Isle and Venice shore botes which In combination with the other onshore facilities will provide auch, If not a l l , of the necessary supplies to conduct tho proposed activity. Further, other service Industries have been established throughout coastal Louisiana In past ytars which can provide additional services, 1f necessary. Therefore, no now land acquisition or construction of new support facilities Is expected In Louisiana as a result of the proposed activity In Mississippi Canyon Blocks 885 and 929.

D. NEW OR UNUSUAL TECHNOLOGY

There are no new or unusual operating procedures which will be used during the proposed exploratory drilling activity which aay affect coastal waters.

E MAPS

Figure I depicts the location of Mississippi Canyon, Blocks 885 and 929, In relation to the Louisiana coastal zone. Figure 2 shows the surfece locations froa which the proposed wells will be drilled 1n Blocks 885 and 929.

2

F. MEANS. ROUTES, QUANTITIES, ANO DESTINATION OF PROOUCTION

This discussion It not applicable -Ince tho propostd activity It a Plan of Expl oration.

3

FIGURE I

Showing location of Blocks 885 & Mississippi Canyon, Offshort, La.

929,

840

884

928

972

841

.3840.0-

I 311

I

4 M "C"

OCS-O-6983

BLOCX t M MISSISSIPPI CAMYON

71O0*

It "A" fe!

— r

820O

9100*

CANYON

15840.0"

973 i a

842 y-1 o.t oo,—o.oc

886

N l » l l t , l 20.00-

930

Y- | 0-' eV 8 C"

974

FIGURE 2 Proposed Surface Locations of Wills "A", "B" & "C M , located in Block 885, & Wells "A", *"B", "C M & T T , located in Block 929, Mississippi Canyon, Offshore, Louisiana.

SECTION 2.0 DESCRIPTION OF AFFECTEO ENVIRONMENT ANO IMPACTS

A. PHYSICAL ANO ENVIRONMENTAL

1. Comaerclal Fishing. Mississippi Canyon Blocks 885 and 929 arc located south of the National Narine Fisheries Service Grid Zone 13, which extends froa the Bl1oxi-Gulfport region on the east to the Grand Is le , LA area on the wast then south to the outer 1 raits of the Continental Shelf. In considering the zone as a whole, aenhaden and croaker comprise nearly 751 of the vol uae of al l the fisheries with shriap composing approximately 101. Blocks 885 and 929 are found outside of al l the major harvest areas for f infish „.id shellfish. Major open oyster harvest areas near the proposed activity He approximately 85 statute a l i a s to the north In the marshes of Plaquemines Parish, LA (BLM 1979, pp. 11-66 and 67, Visual No. 5; BLM 1981, p. 109; MMS 1983a, Visual No. 4; NMS 1983b, Visual No. 4-1).

No kelp harvesting or marlculture occurs In or near Mississippi Canvon Blocks 885 and 929.

No significant long-terra lapact on the area's coaaerclal fisheries should result froa the proposed activity* Short-term effects wil l Include temporary losses of sea bottoa and degraded water quality wittin ana around the Immediate v ldn i ty of the r i g , primarily beciuse of Increased turbidities during dr i l l ing activit ies (Monaghan et a l . , 1976). Increased turbidities and suspended solids c( centra tions wil l occur on a temporary basis as the result of Installation of the dr i l l ing r ia and upon I ts departure. Additionally, discharges of dr i l l ing auds and cuttings during exploration act iv i t ies wil l create a turbidity pi uae and cause Increases 1n suspended sol ids. Studies have shown that background seawater suspended solids concentrations occur within approximately 1,000a of the discharge point (Monaghan et a l . , 1976; Ayers, 1980). Field investigations In offshore areas In Texas have shown that dril l ing fluid discharges may result In Increases of trace metals 1n bottoa sediments, with concentrations decreasing with Increased distances frca the point of discharge (BLM, 1978b; pp. 105, 114). In a review o' available l i terature, Ayers (1980) and Neff (1980) concluded that discharges of dri l l ing fluids have no measurable long- or short-term effects on aarine l i f e and alnlnal effects on water quality.

6

Discharges of domestic ond sanitary wastewater will bo treated In accordance with OCS Order No. 7 and EPA NPDES effluent 1 Imitations guidelines, which will result In a negligible effect on water quality.

Statistics available for the northern Gulf of Mexico indicate that for the period of 1964-1981 a total of 100 blowouts had occurred, with only 9 blowouts resulting In losses of oil and/or condensates. Further, aost blowouts producing spillages were associated with production Ktivities and not with exploration as proposed herein. Data available for 1967-1980 showed that drilling operations accounted for less than 6t of known oil spillage Into the Gulf. Other records for 1964-1981 revealed that 1n the event spillages should occur they will be less than SO barrels In t entity 99s of th% tlae and less than one barrel 891 of the tlae U J l . 1981; pp. 266-270). No significant lapact 1s expected on commercial nekton because of 1) the low probability of accidental spillages. 2) the •itlgatlve measures that will be taken to contain and cleanup any releases of oil/condensates as described In the POE. 3) the ability of these organ is*** to avoid areas of disturbance, and 4) the fact that tho proposed activity Is located south of the aajor productive areas for finfish and shellfish.

Oue to the distance of the proposed activity froa tho oyster grounds (about 85 statute nlles) and estuaries associated with the Louisiana coast (about 65 ailes) and the lack of pipeline construction to onshore areas; no Iapacts aro anticipated on tho oyster beds or to the nursery areas found In the estuarine region north and northwest of Mississippi Canyon Blocks 885 and 929.

In addition, any coaaerclal trawlers utilizing Blocks 885 and 929 wil l have to avoid the area around the rig to prevent fouling their nets In dri 'llng equlpaent.

2. Shipping. Mississippi Canyon Blocks 885 and 929 ere not located within the boundaries of any shipping fairway, transit lane, or a horage area. Therefore, no Iapacts to or froa shipping should o^cur, although, vessels will have to avoid the area of the drill ing rig (BLM :978a. Visual No. 1; MMS 1983a I b. Visual No. 11).

3. Snail Craft Pleasure Sorting, Sport Fishing, Recreation. It has been tstlaftUd Wal about lNJ.UUU rotational boats utilize the offshore waters of the central and western Gulf. Nearly all of these boaters aro thought to be recreational fishermen. In studies of recreational fishing. 1t was found that the annual catch has averaged epproxlaately 70 kg (kilograms) per fisherman. Most of the

7

fishing activity occurs 1n nearshore waters or In Inland bays and sounds; however, party and charter boats do venture out farther In the Giilf. Party boats will often anchor near an artificial reef .while charter boats will usually spend more tine trolling. Grunts, croakers, sea trout, drums, snappers, etc . , comprise the majority of the volume of fishes caught In the X S waters (BLM 1974, r. 187; BLM 1978a. pp. 11-57 to 11-59). Note that 1n the offshore area a high productivity big game fishing area Is situated about 12 miles southeasterly of the lease area. In the wetlands and beys along the Louisiana coast north of Blocks 885 and 929, sport fishing for species such as spotted seatrout, red drum, and croaker; and crabbing and shr<«ning are common recreational pastimes, waterfowl hunting 1s popular In the coastal marshes, and •ore passive fores of recreation are enjoyed by some In the form of activities such as swimming, power boating, sailing, camping and blrdwatchlng. As shown on Visual No. 4 by BLM (1979) and MMS (1963a) and on Visual No. 4-11 by MMS (1983b), developed or proposed state and federal park areas 1n the general area of Blocks 885 and 929 and the shore bases Include the Jean Lafitte Park and the Grand Isle SUte Park In Jefferson Parish, LA; and the Isle Dernieres State Park in Terrebonne Parish, LA.

As discussed under the section for coaaerclal fisheries above, no long-tern detrimental Impacts should occur on recreational fisheries 1n offshore, nearshore, estuarine or onshore areas. Some short-term effects (e.g., Increased turbidities and suspended solids) will take place In and around the rig during Installation, dri l l ing, and removal, but these have not been shown to bo significant. No prolonged Iapacts on the sport fisheries should occur in the event of a well blowout or accidental spillages of oil /condensates due to the fact that blowouts ard significant spillages do not generally occur during exploratory drill Ino operations, the aftlgatlve features associated with the rapid Implementation of tho 011 Spills Contingency Plan, the species ability to avoid areas of disturbance, and the distance of Blocks 865 and 92* froa the coast and aajor harvest areas for finfish and shellfish. No detrimental Impacts are envisioned on recreational faci l i t ies or opportunities. Including the park areas described above.

4. Cultural Resources. The results of the multi-sensor engineering Survey and cultural resources Investigation revealed TO anomalies Indicating culturally significant resources In the vicinity of the

Rroposed well locations. Further, no shipwrecks or other Is tori cal cultural resources were determined to be In the lease

area. Additionally, no adverse Iapacts are envisioned on cultural resources within the state of Louisiana due to the distance of Blocks 885 and 929 from these entitles and to the present developaent In the Grand Itle-Venice area (MMS 1983b, Visual No. 11).

8

5. Ecologically Sensitive Features. A general description and 1apac*. evaluation or ecologically sensitive features is provided below and on the following pages under pertinent headings.

(e) aildllfe Refuges and Preserves. SUte and Federal wildlife refuges and preserves found along the Louisiana coast, which are within a 50-e.11 a radius of Mississippi Car yon Blocks 885 and 929 and the Grand Isle-Venice area, are SI^HR 1n Table 1. Re lopacts to these sensitive areas should occu froa the prooosed activity.

(b) Marine and Estuarine Sanctuaries. Based on Infonnation shown M Usual No. ; (BU 19/9) ind Visual No. 10 (MMS 1983a I b,. the nearest protec Ud area of biological significance to Mississippi Canyon Blocks 885 and 929 1s Sackett Bank In the area Block 148, west Delta South Addition. This reef 1s found about 40 ailes north of Blocks 885 and 929, and will not bo lapected by the proposed activity* Although not shown on this aap as protecUd areas, the estuaries found to the north of Blocks BBS and 929 are considered sensitive and ImporUnt ecosysUas. As stated earlier, no lapact It expected on these significant areas.

(c) Areas of Particular SUte Concem. The Louisiana Coastal Hiourcoi Prdgria Final EnVlronaenUI Impact Sutement (Office ot Coastal Zone Manageaent and Louisiana Oepartment of Natural Resources, 1980), and In particular Chapter V: Section C; were consul Ud to detensine the areas of concern. In general, these areas Include the Marsh Island Mlldlife Refuge and Game Preserve, Louisiana Offshore 011 Port, barrier Islands, areas of high erosion, wetland areas sulUble for enhancement by freshwaUr diversion. Lake Pontchartraln Basin, the Port of New Orleans, special areas of rapid delta growth, and special corridor areas In Louisiana. Due to the nature of the project (I.e., exploration vt. production), the distance of Mississippi Canyon Blocks BBS and 929 and tho onshore bases of operation 1n Brand Isle and Venice, LA froa many o. these areas, existing developaent tn the vicinity of the onshore bases, and the lack of need for any facility expansion, no adverse Iapacts shauld occur on these areas of particular s U U concern.

9

Table 1

WILDLIFE REFUGES AND PRESERVES

Approximate Distance

Froa Grand Isle-Venice

LA*

Approximate Distance

Froe* Mississippi Canyon

Blocks 885 I 929* Ownership

Pass A Loutre Mlldlife 45 ari les ESE-Manageawnt Aroa State 5 al ios ESE

Delta National wildlife 40 a i les E-Refuga Fadaral 1 al io E

Breton National 50 a i les ENE-W1ldl I fe Refuge Federal 15 ari les NE

Bohemia Wildlife 25 miles NE-Manageeaent Area State 15 al ios NW

Biloxi Wildlife 50 miles NE-Management Area State 45 al ios NNW

Wisner SUte Wildlife 5 a i les M-Manageannt Area State 45 al ios W

Point An Chlen Mlldlife 25 miles NM-Management Area State 60 miles WMW

Jean Laf i t te National 30 miles N-hi s tor i c i l Park Preserve Federal 50 a l ios NW

Salvador Wildlife 40 miles NNM-Manage-mtnt Area Stete 65 a l ios NM

75 al ios NNE

80 al ios NNE

100 al ios NNE

90 al ios N

130 al ios N

80 al ios NNM

105 al ios NNM

115 rllef NNM

125 a i les NNM

•Statute a i les .

Source: BLM (1979, Visual No. 5), MMS (1983, Visual No. 4 ) , NMS (1983b, visual No. 4-11).

10

(d) Breeding tnd Spawning Grounds. Hi ori tlow Routes. Tho proposed activity snouia not appreciably disrupt Breeding habitats, spawning grounds or migration routes of nektonic organisms due to their abil i ty to avoid areas of disturbance. Loss mobile species will not be affected unless they occur In the region of disturbance such as areas with Increased turbidit ies.

(e) wetlands. Marshes are found throughout the coastal region of Louisiana. North of Mississippi Canyon Blocks 885 and 929 and in the Grand Isle-Venice area these wetlands are generally characterized by brackish and saline marshes adjacent to the Gulf of Mexico with a gradation to fresher types as one moves Inland (Chabreck and Llnscoobe 1978). No detrimental effects to these wetlands are expected fron the proposed activity due to the distance c f Blocks 885 and 929 fron the coast of Louisiana, to the fact that exploration wil l be conducted Instead of production, as the result of ut i l izat ion of existing shorebase f a c i l i t i e s , and mitigative features associated with rapid Implementation of the 011 Spi l ls Contingency Plan.

( f ) Oyster Reefs. Descriptions of the location of major oyster reers and anticipated Impacts were discussed previously In section 2.0.A.O) Commercial Fishing. As mentioned, no Impacts are expected, especially since no pipelines Into the Louisiana coastal zone will be constructed with the proposed activity.

6. Ex ist ing Pipelines and Cables. Based on the results of the nign-resoiution engineering survey and a review of Visual Mo. 11 iMMS 1983b). no pipelines or cables occur In the lease area. Other shallow hazards noted In ' J M blocks were associated with diapiric a c t i v i t y , faulting, and sone sediment Instabil ity which characterizes the region. WUh the use of the semi -submersible r ig and knowledge of these hazards, no problem should be encountered.

7 * Other Mineral Uses. No oi l or gas Is presently being produced from Mississippi canyon Blocks 885 and 929. nor are other alneral resources such as sulfur known to occur. The proposed activity w i l l not affect any ni nerals extraction in nearby leases.

11

8. Ocean Dumping Activities. EPA hai one approved ocean dumping site Jh lhe Gulf of Mexico mith the majority of the aree found 1n the northwest corner of Keathley Canyon Area. This site Is used for the Incineration of liquid chaalcal wastes (Visual Rb. 11, MMS 1983b). As the dumping site 1s situated south of the outer Halts of the continental shelf and southwest of the proposed activity, there will be no effect on exploratory operations at Mississippi Canyon 81 ocks 885 and 929, and vice versa.

The Corps of Engineers ael itai ns sites In the Gulf for disposal of dredged materials froa navigation channels along the Louisiana coest. These disposal areas are located In the vicinity of the channels and will not be Impacted by the proposed activity, nor will they in any way affect the project (BLM 1979, pp. 11-46* 47).

9. Endangered or Threatened Species. Endangered or threatened species IMt Ire presumed or Known td~o?cur in the area which aright be affected by the proposed activity Include some species of aquatic mammals and reptiles. Terrestrial or sami -aquatic species are not discussed herein because no onshore or nearshore Impacts are expected to result froa the exploratory operations 1n Mississippi Canyon Blocks 885 and 929. No facility expansion Is required, and al l transportation will originate froa the Grand Isle-ven1ce area and utilize existing navigation channels or the airways. Additionally, no pipelines will be constructed froa Mississippi Canyon Blocks 885 and 929 to the Louisiana coast line with the proposed activity* Therefore, habitats for resident o.* transient species such as the American alligator, Arctic peregrine falcon and bald eagle will not receive any additional lapact than already occurs In the region around the Grand Isle-Venice area.

Endangered aquatic lammals Include the sol, finback, blue, humpback, and spem whales. These species occur In the central and Western Gulf of Mexico, but adequate Information concerning their population status and migration patters In the Gulf does not exist (BLM 1978a, 11-40; BLM 1978b, 11-52; BLM 1978c, 11-44; BLM 1979. 11-41). It Is known that the proposed wells In Mississippi Canyon Blocks 895 and 929 are loceted 1n 2065' to 2280' of water, which are adequate water depths for these large mammals. However, It Is expected that little, 1f any, lapact will occur to those species froa* the proposed activity because tho endangered cetaceans are uncommon In the area, are sighted only on rare occasions, and they are highly mobile and can avoid areas of disturbance (MMS 1983a, p. KB).

12

Five sptcits of sts turtles comprise tht endangered reptiles In the arta of Mississippi Canyon Blocks 885 and 929: (1) loggerhead, (2) grten. (3) Kemp's Ridley, (4) hawksbill, and (5) leatherback. Tht entire nesting population of Kemp's Ridley sea turtle Is presently Halted to Rancho Nuevo, Tamaulipas, Mexico, although attempts are presently being made to establish a nesting colony on Padre Island National Seashore off the Texas coast. One authenticated nesting record was made for the loggerhead on Padre Island 1n 1979 also. Nott Ino for the loggerhead and other three species 1s generally limited to the Florida coast (U.S. F1sh and Wildlife Service 1986; BLM 1978a, 11-49; BLM 1978b, 11-52; BLM 1978c. 11-44; BLM 1979, I I - 41).

Although no definitive studies have been made on the Impacts of drill cuttings end muds, certain cumulative Impacts could ocei r froa Ingestion of these materials by turtles (see the POC for a description of the aud coaponents). Effects of lesser significance Include those associated with aarine traffic to Mississippi Canyon Blocks 885 and 929, and the possible occurrence of turtles near the rig and Its associated disturbances. The greatest potential Impact to the endangered reptiles would occur during a blowout or during accidents when suspended solid levels would Increase and discharges of oil/condensates aay occur. These possible effects will be lessened by the lack of concentrated numbc * and assemblages of turt'es In Gulf waters, by evaporation and breakdown of the oil /condensates, by the lack of nesting habitats 1n nearby coastal areas, and by rapid leplewentatlon of the 011 Spills Contingency Plan. Evaluations of available data by the BLM (1979, pp. 111-23 to I I I - 26) Indicate that the lack of information on Impacts of oil and gas operations on aarine turtles precludes an ultimate assessaent for these species.

B. SOCIOECONOMIC

A Socioeconomic Data Base Report 1s not required at this time pending Issuance of the final requireaents froa the MMS.

13

SECTION 3.0 UNAVOIDABLE ADVERSE IMPACTS

Exploration ac tlvl t i ts at Moll Nos. A - C 1n Mississippi Canyon Block 885 and Moll Nos. A - D In Block 929 wil l havo certain effects that aro unavoidable. These Include increases In turbidities and suspended solids associated with the Installation and removal of tho dr i l l ing rig and discharges of dril l ing eaads and cuttings. These actions are expected to adversely lapact planktonic and son* benthic communities within the area of disturbance through water and sediment quality degradation or burial with the release of auds and cuttings. These effects do not appear to be s ign i f icant based on a review of past research by the National Research Council (1983) on the effects of dr i l l ing fluids and cuttings In the aarine environment. The Council reported that the effects of Individual discharges art Halted 1n extent and are confined mainly to the benthic environment. Further, research results Indicate that the environmental r isk of exploratory dri l l ing discharges to aost X S communities are small . In the event of a blowout or other accidents where discharges of crude oil/condensates occur, potential Iapacts Include alteration of community structures and mortalities within the area of Influence. The magnitude of this lapact wi l l be diminished by evaporation and breakdown of the crude oil /condensates at the water surface-atmosphere Interface and In the water column, and rapid deployment of clean-up measures described In the 011 Spil ls Contingency Plan.

Air qual i ty In the vicinity of the rig will be affected, but will bt local 1n extent and quickly dissipated by climatic conditions. This action also applies to points along travel rouu % used by surface vessels and a i r c r a f t , but air quality wi l l be degraded to a lessor degree because these emission sources wil l bt In transit the majority of the time. These Iapacts are not considered signi f icant; quantification of these omissions Is provided In the POE. Should a blowout or spillage of oil/condensates occur, a i r quality degradation would be minimal unless a f i re was to occur. In the event of a f i r e , local a i r quality would be degraded but no effect Is anticipated on land resources or human quality (BLM 1979, p.

Discharges of sanitary waste wi l l have a negligible effect on water quality and associated biota since they will be treated 1n accordance with X S Order No. 7 and ZPA NPDES effluent limitations guidelines.

No unavoidable adverse Iapacts are expected to occur on coastal act iv i t ies or resources within the state of Louisiana such as < jmmerclal fishing, shipping, recreational resources and opportunities, cultural ent i t les, ecologically sensitive features, and endangered or threatened species.

14

Based on tlie long-term beneficial effects ( I .e . . supply of new eneroy reserves for the economy and security of the United States) which mill result from potential production, end the current environmental safeguards, i t Is felt that the minor nature of the adverse Impacts described above are justified nith regard to the exploration activities proposed for Mississippi Canyon Blocks 885 and 929. Drill cuttings could ba tr„.-sported to shore, but this Is not considered cost feasible and would augment the potential for long-term Impacts to freshwater resources within Louisiana through disposal In pits or landfill areas. Air emissions could be eliminated, as could the potential for accidental spillages end a blowout, by not conducting the drilling operations, but this Is else not considered a practicable solution to the Nation's energy problems.

15

SECTION 4.0 STATEMENTS OF GUARANTEE

The proposed activity wi n be carried out and completed by Conoco Inc. with the guarantee of the following Items:

1. ) The best available and safest technologies wil l be uti l ized throughout the project. This Includes meeting all applicable ratal rami nts for equipment types, general project layout, safety systaas, and equipment and monitoring systems.

2. ) All operations wi l l be covered by a MMS-approved oil sp i l l contingency plan.

J . ) All applicable Federal, state and local requirements regarding air emissions and water quality and discharge for the proposed act ivi t ies, as well as any other perait conditions, will be coaplled with.

16

SECTION 5.0 CONSISTENCY CERTIFICATION

The Federel Office of Coastal Zone Management approved Louisiana's Coastal Zone Management Plan <n September 1980. Review of the Louisiana Final Environmental Impact statement, particularly Chapter I I and Chapter V, Section C; and comparison with the findings In sections 1.0 through 4.0 1n t h i s Invironmental Report show that the proposed activity at Mississippi Canyon Area, Block* 885 and 929 will be conducted In a manner consistent with the coastal management program of Louisiana.

The Consistency Certif ication fom for Louisiana Is found accompanying the POE.

17

SECTION 6.0 REFERENCES

Ayers, R.C. I960. Comments on tho Fete end Effects of Dri l l ing Discharges 1n the narine Environment. In connection wi .ii Senate B i l l S-211g, "Georges Bank Protection Act." Joint Hearing: committee on Commerce, Science, and Transportation; Subcommittee on Energy Resources and Materials Production, U.S. Senate. Washington, O.C. March 25, 1980.

Brenett , L. and D. h i l l s . 1978. A Guide to M l l d l i f e Manageaent Areas. Louisiana Department of a i i d : I f e and Fisheries. Wi ld l i fe Education Bul le t in Nc. 116. 100pp.

Bureau of Land Management. 1974. Final Environmental Impact Stateaent Proposed '974 OCS 011 and Gas Lease Sale 34. "ew Orleans. Louisiana.

Bureau of Und Manageaent. 1978a. Final Environmental lapact Statement Proposed 1978 OCS Oil and Gas Lease Sale 51. New Orleans. Louisiana.

Bureau of Und Manageaent. 19780. Final Environmental lapact Statement Proposed 1978 X S (HI and Gas Uase Sale 65. New Orleans. Louisiana.

Bureau of Land Management. 1978c. Final Environmental lapact Statement Proposed 1978 X S 011 and Gas Lear* Sale 45. New Orleans. Louisiana.

Bureau of Land Manageaent. 1979. Final Environmental lapact Statement ^•-Proposed 1979 X S Oil and Gas Lease Sale 58. New Orleans.

Bureau of Land Managemen* 1980. Final Environmental lapact Statement Proposed 1980 X S 011 and Gas Lease Sales A62 and 62. New Orleans. Louisiana.

Bureau of Land Manageaent. 1981. Final Environmental lapact Stateaent Proposed 1981 011 and Gas Uase Sales 67 and 69. New Orleans, Louislant.

Louisiana

18

Chabreck, R.H. and G. Llnscombe. 1978. Vegetative Typa Rap of tha Louisiana Coastal Marshes. Louisiana Departaent of Wildlife and F isher ies , New Orleans, Louisiana.

C.H. Fens te maker I Associates. 1984. tnvi rorawn tal Report for Plan of Exploration, South Pass Area, Block 44. Prepared for Ccnoco I n c . , New Orleans, LA. 20pp.

El eu teri us , L. N. 1980. Tidal Marsh Plants of Mississippi and Adjacent States. Missl?$lppl-Alabama Sea Grant Consortium. Publication NO. MASGP-77-039.

Gulf Coast Research Laboratory. 1973. Cooperative GuU of Mexi. o Estuarine Inventory and Study: Mississippi. Ocean Springs, Mississippi. 439 pp.

Nlnersls Manageaent Service. 1982. Draft Regional Environmental lapact Sutement Proposed 1983 OCS 011 and Gas Lease Sales 72, 74 and 79. New Orleans, Louisiana. 131pp.

Minerals Managem nt Service. 383a. Final Regional Environmental lapact: Statement Proposed 1983 OCS Oil and Gas Leases Sales 72, 74 and 79. New Orleans, Louisiana. 2 Vols.

Minerals Manageaent Service. 1983b. Final Environmental lapact Statement Proposed Oil and Gas Lease t . ferlngs. Central Gulf of Mexico (April 1984), Western Gulf of Mexico (July 1984). New Orleans. LA 474pp.

Monaghan, P.H. , C.D. NcAullffe, and F.T. Weiss. 1976. Environmental Aspects of Drilling Muds and Cutting froa Oil and Gas Extraction Operations 1n Offshore and Coastal Waters. Sheen Technical Subcommittee, Offshore Operators Committee, New Orleans, Louisiana, 50pp.

National Research Council. 1983. Dri l l ing Discharges In the Marine Environment. Panel on Assessment of FaUs and Effects of Dri l l ing Fluids and Cuttings 1n the Narine Environment. National Acadeay Press, Washington, O.C. 180pp.

Neff, J.M. 1980. Review of the Toxicity and B.ologlcal Effects of Used Offshore Drilling Fluids to Marine Animals. In Connection with SenaU 8111 S-211g, "Georges Bank Protection Act." Joint Hearing: CoaaltUe on Cotmnerce, Science, and Transportation; Subcommittee on Energy Resources and Material Production. U.S. SenaU. Washington, D.C. March 25, 1980.

19

Of f lc * of Coastal Zone Management and Louisiana Oepartment of Natural Resources. 1980. Louisiana Coastal Resources Program Final Environmental Impact Statement. U- S. Department of Commerce. National Oceanic and Atmospheric Administration, Washington, O . C . and Coastal Management, Louisiana Department of Natural Resources, Baton Rouge, Louisiana. 19088. • appendices.

Off ica of Coastal Zona Management and Alabama Coastal Araa Board. 1980. Tna Alabama Coastal Araa Management Flan and Final Envlror-cental lapact Statement. U. S. Department of Cowaerce, Rational jceanlc and Atmospheric Administration, Washington, D . C , and Alabama Coastal Area Board, Daphne, Alabama. 264 pa.

U.S. F ish and Wildlife Sarvica. 1986. Endangered and Threatened Species of the Southeastern Unltad Statas. Offica of Endangered Species, Region 4, Atlanta, GA.

U.S. F i s h and Mlldlife Service. 1980. Endangered Species of Texas and Oklaho-.' 1980. Albuquerque, raw Mexico.

20