FIELD OPERATIONS . v>West Cameron Area Lease OCS-G 7608 To A 36-inch SSTI Block 258 West Cameron...

ff W A L T E R O I L & G A S C O R P O R A T I O N

September 30, 1998

Mr. Don Howard Regional Supervisor Office of Field Operations U. S Department of the Interior Minerals Management Service 1201 Elmwood Park Boulevard New Orleans, Louisiana 7012-2394

{JSMANAGE/Wavr RECEIVED ^

FIELD OPERATIONS . v>

• LNewOrtea^ -

Attention: Mr. Alex Alvarado Unit Supervisor

Re: Actual Relinquished and Abandoned In-Place Procedure 4.500" Gas/Condensate Right-of-Way Pipeline Installed In and Through Blocks 254, 258 and 259 West Cameron Area, Offshore, Louisiana Gulf of Mexico, OCS Federal Waters Segment No.^9263. ROW OCS-G No.: 12697

Gentlemen:

In accordance with the conditions of Minerals Management Service's approval letter dated June 8, 1998 to "Relinquish and Abandon In-Place" the above referenped pipeline, please be advised that the pipeline was abandoned in-place effectiv^July 25, 19983

Walter Oil & Gas Corporation's representative aboard the jack-up boat, Grand, arrived on location on July 3, 1998 to commence pipeline abandonment operations as approved. Abandonment operations were as follows:

1. Mobed out boat to Stingray's 36" SSTI in West Cameron Block 258. Jumped divers and located SSTI. Closed the 4" ANSI 900 ball valve on the SSTI to 3/4 close position.

2. Mobed pipeline pumps to Walter's Platform "A" in West Cameron Block 254. Hooked up pipeline pumps to 4-1/2" riser. Installed 4-1/2" pig.

3. Flushed pipeline with seawater.

1100 Louisiana, Suite 200, Houston, Texas 77002-5299 713-659-1221 />•

Page Two Actual Relinquished and Abandoned In-Place Procedure 4.500" Gas/Condensate Right-of-Way Pipeline Installed In and Through Blocks 254, 258 and 259 West Cameron Area, Offshore, Louisiana Gulf of Mexico, OCS Federal Waters Segment No.: 9263, ROW OCS-G No.: 12697

4. Jumped divers over SSTI. Closed 4" ball valve. Bled pipeline down at West Cameron Block 254 platform. Removed check valve bypass assembly, misalignment flange, swivel flange and 50' of 4-1/2" pipeline from the SSTI.

5. Installed tap flange with 1/2" needle valve on Stingray's 4" ball valve. Installed plumbers plug in 4-1/2" pipeline. Reburied end of pipeline to 3' BML. Installed sand bags on end of line and on SSTI.

6. Cut 4-1/2" pipeline at West Cameron 254 platform. Removed tube turn and 10' of 4-1/2" pipeline. Installed plumbers plug. Reburied to 3' BML.

7. Demobed from location.

Should you have any questions or need additional information, please contact Judy Archer or the undersigned at (713) 659-1222.

Very truly yours,

WALTER OIL & GAS CORPORATION

Judy Archer

Regulatory/Environmental Coordinator

cc: MMS Lake Jackson District Office

WALTER OIL & GAS C O R P O R A T I O N

June 18, 1998

RECEIVED ^

JUN 2 2 1998

0 r c OPERATIONS ^ .v* -



Approval hereby granted

.^^Donald C. Howard J Regional Supervisor Field Operations i

Re: Application to Relinquish and Abandon In-Place 4.500" Gas/Condensate Right-of-Way Pipeline Installed In and Through Blocks 254, 258 and 259 West Cameron Area, Offshore, Louisiana Gulf of Mexico, OCS Federal Waters Segment No.: 9263, ROW OCS-G No.: 12697

Gendemen:

In accordance with the regulations contained in Tide 30 CFR, Part 250 and Notices to Lessees 85-8, Walter Oil & Gas Corporation (Walter) submitted an application, in quadruplicate, for your review and approval to abandon in-place that certain pipeline, designated as Segment No. 9263, granted to Walter by the Minerals Management Service on January 24, 1991.

This application was approved by your office by letter dated June 8, 1998 and stipulated that the pipeline is to be abandoned within 60 days from the date of approval. Walter respectfully requests an extension to this 60 days until October, 1998. Walter plans to perform said operations sometime between this date and September, 1998.

Should you have any questions or need additional information, please contact the undersigned at (713) 659-1222.

Very truly yours, WALTER OIL & GAS CORPORATION

Judy Archer Regulatory/Environmental Coordinator 1 1

1)

1100 Louisiana, Suite 200, Houston, Texas 77002-5299 713-659-1221

^ A61

•1

JUN-18-1998 09:32 UIALTER OIL 8. GflS 713 756 1155 P.03/04

TO V WALTER O I L & GAS C O R P O R A T I O N

BEST AVAILABLE COPY

June 18,1998

Mr. Don Howard Regional Supervisor

U.S Depanment of the Interior / "ECEIVED ^ Mmerals Management Service / .. 1201 Elmwood Park Boulevard I J U N 18 19S8 New Orieans, Louisiana 7012-2394

„ FIELD Aaenrion: Mr. Alex Alvarado ^ ^ W S w ^ -

Unit Supervisor —1

Re: Application to Relinquish and Abandon In-Place 4.500" Gas/Condensate Right-of-Way Pipeline Installed In and Through Blocks 234,238 and 239 West Cameron Area, Offehore, Louisiana Gulf of Mexico, OCS Federal Waters___^^ Segment No.: 9263< OWOCS-G NoTl2697>

Gentlemen:

In accordance with the regulations contained in Title 30 CFR, Part 250 and Notices to Lessees 83-8, Walter Oil & Gas Corporarion (Walter) submitted an application, in quadruplicate, for your review and approval to abandon in-place that certain pipeline, designated as Segment No. 9263, granted to Walter by the Minerals Management Service on January 24,1991.

Thb application was approved by your office by letter dated June 8,1998 and stipulated that the pipeline is to be abandoned within 60 days fram the date of approval. Walter respectfully requests an extension to this 60 days until October, 1998. Walter plans to perform said operations sometime between this date and September, 1998.

Should you have any questions or need addidonal information, please contact the undersigned at (713) 659-1222.


H Judy Archer Regulatory /Environmental Coordinator


I n Reply Refer To: MS 5232

Mr. C. J. Looke, I I I Walter O i l & Gas Corporation 1100 Louisiana, Suite 200 Houston, Texas 77002-6605

Dear Mr. Looke:

Pursuant t o 30 CFR 250.150(b), the relinquishment of the right-of-way grant associated w i t h the f o l l o w i n g p i p e l i n e i s hereby accepted e f f e c t i v e March 25, 1998:

P i p e l i n e Segment No,

Size (inches)

Length (f e e t ) Service

9263 --4,1/2 9,116 (Right-of-Way OCS-G 12697)

Gas/ Condensate

From

Platform A Block 254 West Cameron Area Lease OCS-G 7608

To

A 36-inch SSTI Block 258 West Cameron Area Lease OCS-G 11780 Segment No. 7358

Your l e t t e r dated March 18, 1998, requests approval t o permanently abandon i n place approximately 9,116 f e e t (1.73 miles) of 4 1/2-inch p i p e l i n e designated as Segment No. 9263, and t o r e l i n q u i s h i n i t s e n t i r e t y , Right-of-Way Grant OCS-G 12697 associated t h e r e w i t h .

Pursuant t o 30 CFR 250.4(b), approval i s hereby granted t o abandon t h i s p i p e l i n e , and i n accordance w i t h 30 CFR 250.159(c), the requirement t h a t the p i p e l i n e be removed i s hereby waived. However, i n the f u t u r e , should i t be determined t h a t t h i s abandoned p i p e l i n e c o n s t i t u t e s a hazard t o n a v i g a t i o n or commercial f i s h i n g operations or unduly i n t e r f e r e s w i t h the other uses of the Outer Continental Shelf, Walter O i l & Gas Corporation s h a l l be required t o remove i t .

Walter O i l & Gas Corporation s h a l l cease t r a n s p o r t i n g hydrocarbons through t h i s p i p e l i n e immediately and complete the aforementioned abandonment operations w i t h i n 60 days of the date of t h i s l e t t e r . A d d i t i o n a l l y , Walter O i l 4 Gas Corporation s h a l l submit w r i t t e n n o t i f i c a t i o n t o t h i s o f f i c e w i t h i n 30 days of the completion of the p i p e l i n e abandonment. The n o t i f i c a t i o n s h a l l include the date the abandonment was completed and an i n d i c a t i o n t h a t the abandonment was completed as approved.

Sincerely,

(Org.Sgd.) J. R4 Hennessey

Donald C. Howard Regional Supervisor F i e l d Operations

bcc: /1502-01 Segment No. 9263, ROW OCS-G 12697 (MS 5232) ^ 5 0 2 - 0 1 ROW OCS-G 12697 (Microfilm) (MS 5033) MS 5232 (Carto)

DIzon:amm:6/1/98:Walter.263

|4

ff WALTER OIL & GAS C O R P O R A T I O N

MANAGEMf/Vf

RECEIVED

MAR 2 5 1998

<a, F|ELD \ P l f n „ OPERATIONS 5 \>

Region, N e « 0 ^

March 18, 1998



Re: Application to Relinquish and Abandon In-Place 4.500" Gas/Condensate Right-of-Way Pipeline Installed In and Through Blocks 254, 258 and 259 West Cameron Area, Offshore, Louisiana Gulf of Mexico, OCS Federal Waters Segment No.: 9263, ROW OCS-G No.: 12697

Gentlemen:

In accordance with the regulations contained in Title 30 CFR, Part 250 and Notices to Lessees 85-8, Walter Oil & Gas Corporation (Walter) respectfully submits, in quadruplicate, for your review and approval to abandon in-place that certain pipeline, designated as Segment No. 9263, granted to Walter by the Minerals Management Service on January 24, 1991.

Walter installed the 4.500" gas/condensate pipeline, 9116' in length, in April, 1991. The pipeline originates at Walter's Platform "A" in Block 254 and terminates at a SSTI with Stingray Pipeline Company's 36" pipeline (OCS-G 2122C) in Block 258, all being located in the West Cameron Area, Offshore, Louisiana.

Walter proposes to "abandon in-place" the pipeline, approximately 9116', from Walter's Platform "A" (Coordinates: X = 1,411,249', Y = 132,397' in Block 254 to Stingray's SSTI (Coordinates: X= 1,405,813', Y = 125,083') in Block 258, all being located in the West Cameron Area.

1. Mobe out dive boat to Stingray's 36" SSTI in West Cameron Block 258. Jump divers and locate SSTI. Close the 4" ANSI 900 ball valve on the SSTI to 3/4 close position.

2. Mobe pipeline pumps to Walter's Platform "A" in West Cameron Block 254. Hook up pipeline pumps to 4-1/2" riser. Install 4-1/2" pig.


Page Two Application to Relinquish and Abandon In-Place 4.500" Gas/Condensate Right-of-Way Pipeline Installed In and Through Blocks 254, 258 and 259 West Cameron Area, Offshore, Louisiana Gulf of Mexico, OCS Federal Waters Segment No.: 9263, ROW OCS-G No.: 12697

3. Flush pipeline with seawater. Monitor bbls pumped and pressure for 4-1/2" pig displacement to the SSTI 4-1/2" pipeline valve. Line displacement: 9115' x .01522 bbls/lin. ft. = 138 bbls total capacity

4. Jump divers over SSTI. Close 4" ball valve. Bleed pipeline down at West Cameron Block 254 platfonn. Remove check valve bypass assembly, misalignment flange, swivel flange and 50' of 4-1/2" pipeline from the SSTI.

5. Install tap flange with 1/2" needle valve on Stingray's 4" ball valve. Install plumbers plug in 4-1/2" pipeline. Rebury end of pipeline to 3' BML. Install sand bags on end of line and on SSTI.

6. Cut 4-1/2" pipeline at West Cameron 254 platform. Remove tube turn and 10' of 4-1/2" pipeline. Install plumbers plug. Rebury to 3* BML.

7. Demobe from location.

Walter will mobilize a dive boat to perform the above procedure. The duration of the proposed operations should take approximately two to three days. Walter will utilize an on-shore base in Cameron, Louisiana. Walter would like to commence operations on/or before May 1, 1998; therefore, your earliest review and approval of this request would be appreciated.

Enclosed for your information are three copies of the "As-Built" pipeline drawing and riser details at platform drawing.

Should you have any questions or need additional information, please contact Judy Archer or the undersigned at (713) 659-1222.


C. J. Looke, III Vice President CJL,III:ja

enclosures

BEST AVAILABLE COPY 42# Pll£

RISER PIPE 3" SCR 80 BRACE

BILL OF MATERIALS ITEM QTY. DESOaPTON

1. I t f - O - PIPE: 4* SCR 80 BORE. ASTM-A106 GR. B. SMLS 1 1 FLANGE: 4" ANS 600# RTJ WN. SCH. 80 BORE. A-105 1 1 FABRICATED PIPE BEND: 4" SCH. 80 BORE. 5-R 90* WITH S-O"

TANGENTS BOTH ENDS, BEVELED BOTH ENDS. A-106 GR. B 4. 1 BALL VALVE: 4' ANSI 600# RU SCH. 80 FxF, FULL OPEN, CAMERON. 5. 8 STUD BOLTS: 7/8" O.D. x 6" LONG. B-7 ALLOY STEEL WITH

2 KR NUTS EACH. IMF3 COATED OR EQUAL 6. 8 STUD BOLTS: 7/8" O.D. x 7" LONG. B-7 ALLOY-SlttL WITH

2 H.H. NUTS EACH. IMF3 COATED OR EQUAL 7. 2 RING GASKET: 4* ANSI 600} R-37, SS. 8. 1 INSULATING FLANGE KIT: 4" ANSI 600$ RTJ 9. 1 NFFDIF VALVE: 1/2- 3600 PS. M x F. 31/26 S.S.

1 1/2"

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—i i - 4 V — " c 1 \ \ j 4 1/2-j | 3" V , (TYP.) (TYP.)

I'-O*

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] raoi O.D. DRILLED HOLE FOR

x 6' LG. STUD BOLT W/ 4 HH. NUTS EACH (TYP. 6)

KNEE BRACE DETAIL

3" SCR 80 BRACE

1/2' SWF PL (TYP)

ROLLED PL

SECTION 'A'

FOR CONT. * PIPELINE BILL OF MATERIALS SEE m m S NO. 551-SX-010

OCI 0 4 layu

1. CONTRACTOR TO FIELD VERIFY LENGTH OF RISER fc ELEVATION OF CLAMPS. 2. FOR RISER CLAMPS SEE DRAWING NO. 551-C-301 & 551-C-302

na OAK KVISXM B l

CONTINENTAL ENGINEERING & CONSTRUCTION SERVICES, INC.

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• HOT" WALTER OO. k GAS CORPORATION

DCTAl FOR 4 l / f aD. RISER KST CAUOtCN BLOW W V

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HIS •-1S-90 551-R-201

NEW EXISTING EXIST. 36*

STINGRAY PIPEUNE

H 1 -

NEW CLAMP J 4" ANSI

BALL & CHECK VALVE

NEEDLE VALVE

4" ANS 900# SWVEL FLANGE

EXTEND SANDBAGS J-O" BEYOND BAU VALVE

3'-2 13/16*

I 4* m m . FROM T WE WEST CAUERON BLOCK 254 'A*

SCALE: 1/4" = I'-O*

SECTION 'A' SCALE: 1/4" = I'-O"

OCT 04 laau

NO

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S:

1. BACKFILL ALL EXCAVATION WITH SANDBAGS (SAND ONLY) TO CLOSE THE HOLE TO THE BATTOMS NATURAL CONTOUR.

2. SANDBAGS OF CEMENT AND SAND MIXTURE ARE TO BE USED TO SUPPORT NEW VALVES. BEST AVAILABLE COPY

CONHKNTAL EMCMCDWO " t * COHSTWUCTMH

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jaucm wrcj CAMERON BLOCK 258

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4>-

(TIP.) 6' 3R 45' Eli (TYP.)

BEST AVAILABLE COPY

SEE CLAMP DETAIL

6" ANSI 150# RF SUP ON FLANGE

(TYP. 8) SEE HINGE PL DETAIL

1 1/2"

UPPER PLAN LOWER PLAN

DOUBLER PL 3/4 x 18" x 22" ROLLED TO FIT 42 1/&" LD. (TYP. 2)

_ ^ ELEV. (+) 6'-0'

^ ELEV. (+) i'-Om

tf-O" UMJL ELEV. tf-fl*

6 5/8" SOI 80 3-R FABRICATED PIPE BEND

(TYP. 2)

ELEV. (-) V-O'

ElEV. (-) S'-O' _

6* ISOj ANSI RF SUP ON ac. (TYP.)

HINGE PL DETAIL SCALE 1 1/2" = I'-O"

TYP. 4

< \ m 4 1 1/8" O.D. x 1 3/4" SLOTTED HOLES FOR ' 1" O.D. x 6" LG. STUDS W/ 4 HH NUTS k

(2) 2 1/2' O.D. x 1 3/16" LD. TEFLON COATED FLAT WASHERS (TYP. 2)-_

STIFF

42" OJ). Ptt£

- I • — } - ' ' i | ELEVATION "C" N.T.S.

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3/4" CLAMP PL LD. = 1'-9 1/4" R.

CLAMP DETAIL SCALE 3/8" = I'-O"

1 1/8" O.D. HOLE FOR 1" Oi). x 6* LG FULL THR'D STUD BOLT W/4 RR NUTS EA.

(TYP. 3 PLACES) -

42" O.D. PILE HINGE PL 1/2 (HP.)

EHVATION 'D-

ELEVATION "A" SCALE 3/16" = I'-O"

ELEVATION "B" SCALE 3/16" = I'-O"

1. ALL STUDS , NUTS k FLAT WASHERS TO BE IMF COATED OR EQUAL

1 BLAST k PAINT AS PER CE&CS SPEC. NO. 002 3. ALL WELDS TO BE FULL PENETRATION.

UNLESS OTHERWISE NOTED

CONSTRUCTION SERVICES, INC.

NJ-S- ncr 04 m CONTINENTAL ENGINEERING &-

WALTER OIL & GAS CORPORATION a m

RISER GUARD FOR 4" RISER UEST CAMERON BLOCK 254 "A"

/ iZM I NOTED 19-26-90 1 551-SK-0(O 1^

BEST AVAILABLE COPY

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WC 258 SUBSEA. TIE-IN

A'

4 ANSI 900# BALL & CHECK VALVE

N.T.S.

EXISTING -EXIST. 36" STINGRAY PIPEUNE

r EXIST. 12" BALL VALVE

^EXIST. CLAMP

CM

1" 3600ff S.S. NEEDLE VALVE

4" ANSI QOOff MISALIGNMENT FLANGE

4 ANSI QOOff SV.1VEL FLANGE

I 4" PIPELINE FROM WEST CAMERON BLOCK 254^"

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STN. 91-1-15.73 SUBSEA TIE-IN WC 258 X = 1.405,813 Y = 125,083 Lot. = 28 , 59 , 50.541"N Long. = 93'11'30..750"W

4S-BU!L7- 4" GAS PIPFL/NS TOTAL FOOTAGE (excluding riser) = 9115.73'

(1.73 STAT. MILES)

V.

WALTER WC 2 5 4 ^ ' RISER

N.T.S.

STN. 0 + 0 0 WC 254 'A ' RISER X = 1.411.249 Y = 132,397 Lot. = 29 , 01'03.807"N Long. = 93 ,10*30.873"W

I

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FLOW a (+) IQ'-Q:

i wc 254'A'

STN. 52+94.52 BLOCKUNE CROSSING X = 1.408.095.360 Y = 128.145-376

20'-Q' \ / 2 ' ' THK SPLASHTRON

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I 1 RISER CLAMP TYPE 1

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MUULIME El- ( - ) a T - 0 "

1. 4" PIPELINE TO WC 258

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RISER CLAMP TYPE 2

300'

3'0' 4'3"

6.75'

WC 258 SUBSEA, TIE-IN

N.T.S.

NATURAL GULF BOTTOM

NEW

1 1 1

NEW P/L CLAMP

lo^-g'

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•NEW P/L CLAMP

O

W;ATER LEVEL (MSL)

3' MIN, SEABtO 3' UIM. 5' CO /ER. 300' OUT FROM RISER—i

..V.l.V.' iT-

SECTION "A"

KEY PLAN N.T.S.

\

< FLOW AS-BURIED 4" GAS PIPELINE — 4" RISER

AS-BUILT 4 " GAS PtPEHNE. WALTER WC 254 'A ' RISER TO WC 258 SUBSEA TtE-IN

X COORP. Y C W P . X COORD. Y COORD

WALTER, WC 254'A' RISER 1.411.249 132.397 POINT n s 1.408.320 128.454

POINT 1 1.411.118 132,207 12 1.408,060 128,096

• 2 1.410.786 131,750 - 13 1.407.790 127.744

>* 3 1.410.425 131.286 14 1.407.52S 127.387

4 1.410.146 130.906 - 15 1.407.260 127,042

5 1.409,867 130.562 - 16 1.407,014 126,683

6 1.409.632 130.222 17 1.406.752 126,320

7 1.409.365 129.975 13 1.406.484 125,973

S 1.409,112 129.515 - 19 1.406.207 125.626

- 9 1.408.846 129.164 20 1,«05.911 125.241

- 10 1.408.582 129.814 WC 258 SUBSEA T E-IN 1.405,813 125.083

TOTAL FOOTAGE (excluding riser) - 9.115.73'

PIPE CODE

LOCATICN CLASSIFICATION

CORROSION COATING

WEIGHT COATING

ANODES

FIELD JOINTS

TRENCH DEPTH

HYDROSTATfC TEST PRESSURE

MAOP

4.500" O.D. X 0 .237" W.T. API 5L GRADE B

CLASS 1

SCOTCHKOTE 206N THIN FILM FUSION BONDED EPOXY - 12 - 14 MILS

NIONE

2 5 ^ GALVALUM III, NOMINALLY EVERY 500 FT.

HEAT SHRINKABLE SLEEVES

3.5 FT.. EXCEPT 5 FT. FOR 300 FT. OUT FROM RISER

2160 PSIG IFOR 8 HOURS

144(0 PSIG

GENERAL NOTES J. CO-ORDINATES FOR WC 2 5 4 ^ " RISER TAKEN FROM PERMIT PLAT AND SURVEYED BY OTHERS. 2. CO-ORDINATES FOR WC 258 SUBSEA TIE-IN TAKEN FROM PERMIT PLAT AND SURVEYED 3Y OTHERS. 3. PIPELINE IS COVERED TO MINIMUM REQUIREMENTS IN AREAS WHERE SPOT CHECKED AS PER AMERICAN

OILFELD DIVERS. INC.. DIVE INSPECTORS FOR WALTER OIL AND GAS CORP-

LEGEND

PROPOSED PIPELINE

EXISTING PIPELINE

WELL LOCATION

PLATFORM

BLOCKUNES & NUMBERS

LINE TAP

UNITS: U.S.C. ic G.S. FEET

PROJECTION: LAMBERT

FALSE EASTING: 2,000,000.0

ZONE: LOUISIANA SOUTH

DATUM: NAD "927

SPHEROID; CLARKE 1366

CENTRAL MERIDIAN: 9r20'Q0.O"W

UPPER PARALLEL: 30-42"00.0"N

LOWER PARALLEL: 29'1S'00.0'*N

ORIGIN LATITU1DE: 28*40'00.0"N

IITION

DIS POSITION

LAY BARGE; MAC—1

SURVEY DATES; MARCH & APRIL 1991

D.P. REF.: 0617

JOB NO.: 1074-LB

DRAWING No.: WALT0617

REFERENCE DRAWINGS CONTINENTAL ENGINEERING fll55l-R~201

CONTINENTAL ENGINEERING rf55l-SR-002

/ hereby certify thai this plat has beeri prepared follouring

generally accepted professionat startdards for offshore surveys.

Keith A. Codd Tx. Reg. tfo. 4669 -4113 fa j

Date

D P C NES & U Y C R O S S I N G ;

STATION SIZE COVER CLR. OWNER WALTER OIL a GAS CORPORATION

GULF OF MEXICO

INTERNATIONAL

APPROVAL AS-BUILT 4" GAS PIPELINE DRAWN BY: OATE:

CHECKED: DATE: REVISION;

DATE; CHECKED: DAIE:

LLM. 4/12/91 WEST CAMERON AREA

BLOCKS 254 ~ 258

SHEET 1 OF 1

In Reply Refer To: MS 5232 (ROW OCS-G 12697) WAY 0 r 1991

BEST AVAILABLE COPY Walter Oil & Gas Corporation Attention: Ms. Judy Aroher 240 The Main Building 1212 Main Street Houston, Texas 77002

Gentlemen:

In aooordanoe with 30 CFR 250.158(b), your l e t t e r dated April 22, 1991, transnitted a pipeline oonstruotion report for the following right-of-way pipeline:

Pipeline Right-of-way Size Length Number (inches^ (feet) Service From To

OCS-G 12697 M 1/2 9,116 Gas/Condensate Platform A A 36-inch SSTI Block 254 Block 258 West Cameron West Cameron

The data which you provided indicates the following test infonnation and establishes the assigned aaxlraum allowable operating pressure (MAOP) for this pipeline: .

Pipeline Right-of-way Number

Test Pressure Duration MAOP MAOP (hours) (psig) Determination

OCS-G 12697 2,216 8 1,348 Receiving Pipeline

The total length of the "as-built" pipeline right-of-way is 1.73 railes.

In future correspondence, please refer to the above pipeline by i t s assigned right-of-way number.

Sincerely,

(Orig. Sgd.) A. Donald Giroir

D. J. Bourgeois Regional Supervisor Field Operations

boo: /L502-01 P/L OCS-G 12697 w/orig report (MS 5232) (K. Faust) 1502-01 P/L OCS-G 12697 w/copy of report (MS 5033) (C. Williams) MS 5421

MS 5232 Carto w/cy of location plat £

ABritton:km:4/30/91 ; /) O ^ T 7 «,

n WALTER OIL & GAS CORPORATION

A p r i l 22, 1991

Mr. Daniel Bourgeois Regional Supervisor Office of Field Operations U. S. Department of the I n t e r i o r Minerals Management Service 1201 Elmwood Park Boulevard New Orleans, Louisiana 70123-2394

Attention: Mr. John Guidry

Re: OCS-G 11315: 4.500" Natural Gas & Condensate Right-of-Way Pipeline Installed In and/or Through Blocks 254, 259, and 258 West Cameron Area, Gulf of Mexico, Offshore, Louisiana Reference: MS 5232 (OCS-G 12697)

Gentlemen:

In accordance with the terms and provisions outlined i n T i t l e 30 CFR 250.158(b), Walter Oil & Gas Corporation i s hereby submitting, i n t r i p l i c a t e , for your review and approval the "As-Built" Drawings and the Hydrostatic Test for the 4.500" Natural Gas & Condensate Right-of-Way Pipeline I n s t a l l e d i n Blocks 254, 259, and 258, West Cameron Area, Offshore, Louisiana.

The i n s t a l l a t i o n for the subject pipeline was completed on A p r i l 8, 1991 and the hydrostatic testing was performed on A p r i l 8, 1991. Production from lease OCS-G 7608, Block 254, West Cameron Area commenced on A p r i l 11, 1991.

Should you have any questions or need additional information, please contact the undersigned at (713) 659-1222.

Very t r u l y yours,


Judy Archer

Regulatory/Environmental Coordinator

:JA

attachments

240 The Main Building, 1212 Main Street, Houston, Texas 77002 (713)659-1221

APR 08 '91 12=33 ONSHORE & MARINE

15

p. 1/5

C. 5. / . H Y D R O S T A T I C T E S T E R S HydrosUtlc Test Report

BEST AVAILABLE COPY P. O. BOX 51282. O.CS. IAFAYETTE, LA. 70505

Line. • i <

Line Size.

- Location ^ Cr / .tab Na 1

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Length f^2CLlft

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Terrain.

Fill began

Soli Cootfitron f fcf^g £{£4

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Meter Reading: Beginning. IGats Final -Qal.

Displacement: TheoretleaL .Gal.. Meas. .Gai.

Cfolluii* Required to increase proaouro from.

Exposed pipe — foO ft

.P.S.I.G. to

General Contractor

.P.S.I.G. Gal PREStUKK WJMP MKASURCMCKT

Fill water Temperature

TIME

Data Hour

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Remote Earth

REMARKS

i^LmjLBjuassL

Field Approval for PIp«lfno Company

Insp.

Chief Imp.

APR 08 '91 12:36 ONSHORE & MARINE P. 3/5

6 BEST AVAILABLE COPY

PIPR 08 '91 12:40 ONSHORE & MARINE P. 5/5

9

P. O. Zg/t 51282. O.CS.

Line

C . S . I. HYDROSTATIC TESTERS Hydrostatic Test Report

Line Size.

l o c a t i o n . ^ C v - 2 3 * / . . Job No. Length

LAFAYETTE. IA. 70505

.O.D.. .W.T.Gr.. .. Sta/M.P to Sta/M.P.

TIME Doul Weight TEMPERATURE OF

DATE HOUR Pressure Air Pipe Remote Earth

REMARKS

-

CSI Enginee

Witnes* t

2

Field Approval for Pipelin* Comoany

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7 ^ Chief Insp.

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$ .

Pumper Gauging Services Engineering Fabrication Sandblasting Painting Turn-key Projects Concrete Post Tensioning Hydrostatic Testing Rentals

TEST REPORT NO. 30691 - 1 WALTER OIL & GAS, INC. 12" & 4" NOMINAL PIPE SUB-SEA ASSEMBLY WEST CAMERON 258

ONSHORE & MARINE CONSTRUCTION,INC.

6 RO. Box 30838 • Lafayette,lLouisiana 70593 • Office (318) 233-2727

c Pumper Gauging Services Engineering Fabrication Sandblasting Painting Turn-key Projects Concrete Post Tensioning Hydrostatic Testing Rentals

Q

MARCH 11, 1991

MR. MALLORY WARE ONSHORE fit MARINE CONSTRUCTION, INC. P.O. BOX 52280 LAFAYETTE, LA. 70505

RE: O.M.C., INC. W.C. 258 12" SUB-SEA ASSEMBLY

DEAR MR. WARE:

PLEASE FIND ATTACHED A COPY OF CERTIFIED TEST REPORT NO. 30691-1, WHICH CONTAINS RECORDED DATA ON 12 n BY 4" NOMINAL SUBSEA ASSEMBLY BELONGING TO WALTER OIL & GAS, INC.

THE HYDRO-STATIC TEST WAS CONDUCTED IN ACCORDANCE WITH SPECIFICATIONS SET FORTH BY WALTER OIL & GAS, INC., AS WELL AS INDUSTRY STANDARDS PROVING THE STRUCTURAL INTEGRITY OF SAID LINES.

IF ANY FURTHER INFORMATION IS REQUIRED, PLEASE CONTACT ME.

IS NEER

P.O. Box 30838 • Lafayette? Louisiana 70593 • Office (318) 233-2727

6 Pumper Gauging Services Engineering Fabrication Sandblasting Painting Turn-key Projects Concrete Post Tensioning Hydrostatic Testing Rentals

TABLE OF CONTENTS

DESCRIPTION PAGE NUMBER

DEADWEIGHT RECORD #1 1 - 2

PRESSURE CHART #1 3

PIPE TEMPERATURE #1 4

AMBIENT TEMPERATURE #1 5

DEADWEIGHT RECORD OF VALVE TESTS 6

CERTIFICATIONS 7 - 1 0

TEST2.RPT

o RO. Box 30838 • Lafayette, Louisiana 70593 • Office (318) 233-2727

BEST AVAILABLE COPY

l U U t l U t U t t U U U U U t n i i l U U I U t t U I U U U U U U I I I l t t i i U U I t t U t U U U t t U U t U U U M t U M U I U t U l t U t t t U t l t t i t r t ;.v'..K :' I t t • DEADWEIGHT RECORD t t l • ' *• ' ^ V ^ '

UUIJ lH IUUUUUHIUJ IU I tnJUHUIUUUI t l tUUJUIMUHUlJ lU l t lU I IU IU i t l l l tUUUUMUIUI IUn iU tH tU t t t ,

A.F.E. NUNBER JOB NUMBER QMC 276

LINE OHNER V|UW Q>^^ ..GENERAL CONTRACTOR HfYsT

TEST SECTION FROH STA. c7wv.T i| ft* i TO STATION

- • j r . » - f /

PIPE DESCRIPTION \5i ' >H^. S U . W < L ^ & s f

NAXIHUN PIPE ELEVATION-tW

HINIHUH PIPE ELEVATION 4 ?>

DATE k TIHE TEST BEGAN ^ c K V . &^0 (w-v

'"•ELEV. DEADHEIGHT TESTER 4-^4

DATE 4 TIHE TEST COHPETED

HAXIHUH TEST PRESSURE D l ^ ^ , .(IINIHUH TEST PRESSURE ^ L ^ f ' s

t t t t t t t t t t tuuut t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t t i t t tu t t tu tu t t tu t t t tu t t t t t t t t t t t t tu t t t t t t t t t t t t ^ ,-. -i TEHPERATURE • * • \ "V"' v • . J TEHPERATURE-' S . W V ' ^ ^ J

•TIME;. , DEAD HEIGHT AHBIENT TEST . .. v./vTIflE DEAD HEIGHT AHBIENT . • 4 ' JEST J

READING • TEST

HEDIUH DEAD HEIGHT

READING . v'-' !,• READING *• HEDIUH ti;; • ,• READING. 7 .>.'HEpiUlt l^smmi1

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RESULTS OF TEST: , j UNACCEPTABLE UNACCEPTABLE1 DURATION OF TEST

• CONTRACTOR'S REP.^/g^ OWNER'S REP. TESTER'S REP . t f t Q

^ JEADHEISHT SERIAL NUHBER C,-\ ^-VQ. AMB 1 ENTTEHPERATURE'RECORDtR'.S/N TS

PIPE TEHPERATURE' RECORDER S/H PRESSURE RECORDER S/N '. -1 r r a. l^U^

Pressure Test Log Report No.

A NO. Of Sheets

Deadweight Time Temp. Remarks Deadweight Time Temp. Remarks' 1

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Comments on Testing:. (Note dlsposlllon ol any leaks or lailwes)

Original Copy With all Supporting Charts and Graphs Must be Submitted to the Lombard Olllee at Completion ol the Speclllr. Test.

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BEST AVAILABLE UUPY

Oriqinal Copy With all Supporting Charts and Graphs Must be Submitted to thn Lombard Olllee at Completion o l the Sppntir f p i l

S R C ENGINEERS, INC. CARDINAL DRIVE • P. O. BOX 31 10S • LAFAYETTE. LA. 70503-1106 • 316/837.3810 STEPHEN ft CALLEGARI. P.E.

BEST AVAILABU COPY

s-r<=»-rer'ii=:tNiT 01==* c e i R - r x X cz^- r x O I M

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DEAD WEIGHT GAGE/TESTER^

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PRESSURE RECORDER

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PART NUMBER SERIAL NUMBER <£9'7'2-~

O ! • PRESSURE RANGE , PSIG ACCURACY ^ O i ' O % FULL SCALE J T l i - PSI

2"; PRESSURE RANGE PSIG ACCURACY + % FULL SCALE £ IZZZZ P S I

Tested i n VERTICAL Position Temp. 0 F

This i s to c e r t i f y that th is instrument has been inspected

and tested against Pressure Standard VAETRIX GAUGE l S/H 721

(ACCURACY 0.093% of FULL SCALE) traceable to the National Bureau of

Standards.

Special Conditions .

DATE OF TEST /0/&l/9o TESTER ^^^^^^T jL^Jc0~>^-—->

o

o

S R C ENGINEERS IC. I OO CARDINAL DRIVE • P. O. BOX'31106 • LAFAYETTE. LA. 70903-1 I OS • 318/837-3010 STEPHEN a CALLEGARI. P.E.

BEST AVAILABLE COPY

TEMPERATURE RECORDER

MAKE S^M£&\LA*) AJeroi.

SERIAL NUMBER "1) P~5^67

TEMP. RECORDER 0~ISo°t

The instrument described above has been calibrated from 20%

to 80% of scale as verified by laboratory grade thermometer

YEHOWBUCK (HERCUBY F l l l t D ) IHtHHDHtTER . RAKGE: 0-?20'F

Tested i n VERTICAL Pos i t i on

DATE OF TEST o t /^ faf TESTER^

S R C E N G I N E E R S , INC. T-8 1 CM^RDINAL DRIVE • P. O. BOX 31106 • LAFAYETTE. LA. 70503-1 106 • 318/837 3810 STEPHEN R. CALLEGARI. P.E.

BEST AVAILABLE COPY

TEMPERATURE RECORDER

MAKE ^/HSAICAJ /C/ere/t-

SERIAL NUMBER A/tf/C - tfo*}

TEMP. RECORDER O - tgo

The instrument described above has been calibrated from 20%

to 807. of scale as verified by laboratory grade thermometer

YELLOWBACK (MERCURY FILLED) THERHOHETER RANGE: O-ZZO'F

Tested i n VERTICAL Position

DATE OF TEST m 1 8 WJJ TESTER

O

SRC ENGINEERS, INC. 1 (

IOO CARDINAL DRIVE • P. O. BOX 31 106 • LAFAYETTE. LA. 70S03.1106 • 318/837-3810 STEPHEN R. CALLEGARI. P.E.

C) P F ST AVAILABLE COPY

s-r/^-risi-i iErfNi-r or=* GI=: I=*T I !=• i c#=k"r i O I M

PRESSURE GAUGE

DEAD WEIGHT GAGE/TESTER

PRESSURE RECORDER

MAKE sA-MEO. IO* J AJeTETrt-

PART NUMBER / "2- SERIAL NUMBER MHfc -ML 3

1. PRESSURE RANGE 3/Oft> PSIG ACCURACY / 00 7. FULL SCALE J 30 PSI

2. PRESSURE RANGE PSIG ACCURACY + 7. FULL SCALE T PSI

Tested in VERTICAL Position Temp. "F

This is to certify that this instrument has been inspected

and tested against Pressure Standard VAETRIX GAUGE I S/H 721

(ACCURACY 0.093X 0" FULL SCALE) traceable to the National Bureau of

Standards. *

Special Conditions

DATE OF TEST m 1 9 '381 TESTER

AS-BUILT 4" GAS PIPELINE. WALTER WC 2 5 4 ^ ' RISER TQ WC 258 SUBSEA TIE-(N

Y COCRD.

128.454

X COORD. X.COQRD.

WALTER, WC 254 ,A , 1.4111?49 132,397 / POINT 11 1,408,320

POINT 1 1,411.118 132,207 " 12 1,408,060

* 2 1,410.786 131.750 / " 13 '1,407,790

i f 3 1.410.425 " 14 1,407,528

m 4 1,410,146 130,906 / " 15 1,407.260

:> 1,409,867 130.562 4 " 16 1,407,014

• 6 1,409,632 130,222 i " 17 1,406,752

- 7 1,409,355 129,875 / ? 18 1,406,484

• 8 1,409.112 129,515 y - 19 1.405,207

• 1.408.846 129.164 " 20 1.405,911

10 1.408.582 129,814 wc 258 SUBSEA TIE-IN 1.405.813

/ 128.096

127,744 /

127,387

127,042 *

126,683

126,320 /

125.973

125.626

125.241 /

125.083

TOTAL FOOTAGE (exclucftig riser) = 9.115.73*

PIPE CODE

LOCATION Cl^SSlFICATtON

CORROSION COATING

WEIGHT COATING

ANODES

FIELD JOINTS

TRENCH DEPTH

HYDROSTATIC TEST PRESSURE

MAOP

4.500 O.D. X 0.237 W.T. API 5L GRADE B

CLASS 1

SCOTCHKOTE 206N THiN FILM FUSON BONDED EPOXY - 12 - 14 MILS

ffsONE

25// GALVALUM 111, NOMINALLY EVERY 500 FT.

HEAT SHRINKABLE SLEEVES

3.5 FT,, EXCEPT 5 FT. F'OR 300 FT. OUT FROM RISER

2160 PSiG FOR 8 HOURS

1440 PSiG

GENERAL NOTES 1. CO-ORDINATES FOR WC 254'A' RISER TAKEN FROM PERMIT PLAT AND SURVEYED BY OTH LRS. 2. CO-ORDINATES FOR WC 258 SUBSEA TIE-IN TAKEN FROM PERMIT PLAT AND SURVFYFD HY OTHFRS. 3. PIPELNE iS COVERED TO MINIMUM REQUIREMENTS IN AREAS WHERE SPOT CHECKED AS PER AMERICAN

OILFIELD DIVERS, INC.. DIVE INSPECTORS FOR WALTER OIL AND GAS CORP.

LEGEND

• or A

1 2 3 4

ix j

PROPOSED PIPEUNE

EXISTING PIPEUNE

WELL LOCATION

PLATFORM

BLOCKUNES Ac NUMBERS

LINE TAP

UNITS: U.S.C. flc G.S. FEET

PROJECTION:: LAMBERT

ZONE: LOUiStlANA SOUTH

DATUM: NAD'1927

SPHEROID: CLARKE 1866

CENTRAL MERIDIAN: 9r20'OO.Q"W

UPPER PAR/ALLEL: 3D-4?"aO.O"N

LOWER PAR/ALLEL: 2918*00.0"N

ORIGIK LATFirjDE: 28'4Q'00-Q"N

FALSE EASTING: 2,000,000.0

FALSE NORTHING: 0.0

REF PIX POINT: STERN POSITION

POSITIONING SYSTEM: SYLEDIS POSITION

LAY BARGE: MAC-1

M 11;VI ! DAII s: •/.•M- h .v AI RII 1991

D.P, REF.: 0617

JOB NO.: 1074-LB

DRAWING No.: WALT0617

REFERENCE DRAWINGS CONTINENTAL ENGINEERING 0551 ~R-201 CONTINENTAL ENGINEERING #551-SR-002

PIPELINES & UTILITY CROSSINGS STATION SfZE COVER CLR. OWNER

INTER

APPROVAL

DRAWN BY; l l A I r :

CHKCKM):

DATE:

REVISION:

DATE:

CHECKED:

DAIL:

LLM.

4/12/91

/ /ieredy certify that this plat has been- prepared follounntf

genirraiiy accepted professionai standards for offshore surveys.

/Ceith A. Codd Tx. Xeg tfo. 4669

JJatB

WALTER OIL a 6AS CORPORATION

GULF OF MEXICO

AS-BUILT 4" GAS PIPELINE

WEST CAMERON AREA

BLOCKS 254 - 258

SHEET 1 OF 1

9 Sti 9^3 ij BEST AVAILABLE COPV Q^Jb

In Reply Refer To: HS 5232 (OCS-C 126S7) 2 4 133t

l/alter Oil & Ges Corporation Attention: lis. Cuuy Aroher 240 Tbe Main Building 1212 Main Street Houston, Texas 77002

Gentlecien:

Pursuant to the authority granted by 43 U.S.C. 1334(e) and 30 CFR 250.150(d), your application dated October 8, 1990, for a pipeline right-of-way two-hundred feet (200*) i n width for the installation, operation, and maintenance of a 4 1/2-inch pipeline, 1.73 Riles i n length, i s hereby approved, as proposed.

The proposed pipeline w i l l transport gas and condensate f r o t Walter Oil & Gas Corporation's Pletforc A i n Block 254, across Block 259t to a subsea t i e - i n with Stingray Pipeline Coopany's 36-inch pipeline (OCS-G 2122C) i n Block 256, a l l i n the West Cameron Area.

This approval i s subject to the following conditions:

1. Walter Oil & Gas Corporation shall construct, operate, and maintain tbe pipeline i n accordance with the appropriate Departisent of Transportation regulations.

2. Walter Oil & Gas Corporation shall adhere to the conditions of Notice to Lessees and Operators Ho. 83-3» Section IV.B.1., prior to conducting the proposed a c t i v i t i e s .

3* Walter Oil & Gas Corporation shall inspect pipeline OCS-G 2122C i n the v i c i n i t y where the proposed work w i l l be performed to ensure that proper cover has been maintained. I f i t i s deterained that environmental or other factors have detrimentally affected the burial depth of the pipeline or the protective cover of appurtenances, Walter C i l & Gas Corporation shall notify this office immediately.

4. Walter Oil & Gas Corporation's regional Oil S p i l l Contingency Plan approved on August 13, 1990, shall cover this pipeiine operation.

\ J

BEST AVAILABLE COPY

Based on our analysis of your application, the naxiuuti allowable operating pressure for this pipeline w i l l be 1,348 psig.

Sincerely,

(Ong. Sgd.) D. J. Bourgeois

D. J. Bourgeois Regional Supervisor Field Operations

cc: Department of Transportation 2320 LaBranch, Room 2116 Houston, Texas 77004

bcc: (1502-01 (P/L OCS-G 12697) w/enclosures (K.Faust) (MS 5232) 1502-01 (P/L OCS-G 12697) (C.Williams) (MS 5033) MS 5270 US 5440 I'S 5421, w/receipt MS 5232 Carto, w/plat

CWilliaiBs:ds: 1/17/91 :WP


October 8, 1990

CC5-G. 9 7 -(VlS 5 ^

RECEIVrD %

ocrn FIELD

OPERATIONS 0 0 C S Region,'

Mr. Daniel Bourgeois Regional Supervisor Office of Field Operations U. S. Department of the I n t e r i o r Minerals Management Service 1201 Elmwood Park Boulevard New Orleans, Louisiana 70123-2394

Attention: Ms. Carol Williams

Re: Application for a 4.500" Gas Condensate Right-of-Way Pipeline To Be Inst a l l e d In and/or Through Blocks 254, 259 and 258, OCS-G 7608, West Cameron Area OCS Federal Waters, Gulf of Mexico, Offshore, Louisiana

Gentlemen:

Pursuant to the authority granted i n 43 U.S.C. 1334(e) and regulations contained i n T i t l e 30 CFR Part 250, Subpart J, Walter O i l & Gas Corporation (Walter) i s f i l i n g t h i s application i n quadruplicate for a right-of-way two-hundred (200') i n width for the construction, maintenance and operation of a Gas Condensate Pipeline to be in s t a l l e d i n and/or through Blocks 254, 259 and 258, West Cameron Area, Offshore, Louisiana.

In support of thi s application and for your review and use, the following maps, drawings and documents have been enclosed herewith and made a part hereof:

1. 4.500" Gas Condensate Pipeline - V i c i n i t y Map, John E. Chance and Associates, Inc., Drawing No. 1 of 2

2. 4.500" Gas Condensate Pipeline - Pr o f i l e Map, John E. Chance and Associates, Inc., Drawing No. 2 of 2

3. Pipeline Schematic, Drawing No. 551-SK-001

4. 4.500" Subsea Tie-In Asssembly to Stingray's 36" Pipeline, Drawing No. 551-SK-002

5. Riser Guard for 4.500" Riser, Drawing No. 551-SK-003

6. Detail Schematic for 4.500" O.D. Riser, Drawing No. 551-R-201

240 The Main Building, 1212 Main Street, Houston, Texas 77002 (713)659-1221

Ui S. Department of the I n t e r i o r Minerals Management Service OCS-G 7608, Pipeline Application West Cameron Area Block 254, 259 and 258, Offshore, Louisiana, OCS Gulf of Mexico, Federal Waters Page Two

7. Pipe Specifications and General Information, Exhibit "A"

8. Operators and Right-of-way Holders, Exhibit "B"

9. Non-Discrimination i n Employment C e r t i f i c a t i o n

10. Pipeline Pre-Lay Survey

Walter proposes to i n s t a l l a 4.500" Gas Condensate Pipeline, approximately 9,112.89 feet (1.73 miles) i n length, departing from Walter's West Cameron Block 254, "A" Production Platform and w i l l terminate at a 12-3/4" subsea t i e - i n on Stingray's 36" diameter pipeline i n West Cameron Block 258.

Walter proposes to commence construction i n December, 1990 or as soon as approval i s granted. The time required to lay the pipeline i s estimated at two (2) weeks with an overall project time being estimated at three (3) weeks.

Walter w i l l u t i l i z e an existing onshore base f a c i l i t i e s located i n Cameron, Louisiana.

This application (and any amendments made hereto) i s made with our f u l l knowledge and concurrence with the OCS Lands Act (43 U.S.C. 1331, et seq.) as amended (P.L. 95-372, including the following: Section 5(e) addressing pipeline rights-of-way, requirements of the Federal Energy Regulatory Commission r e l a t i n g to notice of hearing, transportation and purchase of o i l and gas without discrimination; Section 5 ( f ) ( 1 ) addressing operating of pipeline i n accordance with competitive principles, including open and non-discriminatory access to both owner and non-owner shippers; Section 5 ( f ) ( 2 ) which may allow exemption of the requirements i n Section 5 ( f ) ( 2 ) ; Section (e) addressing the assuring of maximum environmental protections, including the safest practices for pipeline i n s t a l l a t i o n ; and Section 5(f)(1)(B) which may require expansion of through capacity of any pipeline except for the Gulf of Mexico or the Santa Barbara Channel.

Additionally, we expressly agree that i f any s i t e , structure or object of h i s t o r i c a l or archaeological significance should be discovered during the conduct of any operation w i t h i n the permitted right-of-way, we sh a l l report immediately such findings to the Regional Director of the Gulf of Mexico Region, and make every reasonable e f f o r t to preserve and protect the c u l t u r a l resource from damage u n t i l said Director has given dire c t i o n as to i t s preservations.

Ui S. Department of the I n t e r i o r Minerals Management Service OCS-G 7608, Pipeline Application West Cameron Block 254, Offshore, Louisiana OCS Gulf of Mexico, Federal Waters Page Three

In accordance with applicable regulations, we have delivered a copy of the application and attachments thereto by c e r t i f i e d mail, return receipt requested, to each designated operator (Regulation 250.9, contained i n T i t l e 30 CFR Part 250, Subpart A) and/or right-of-way holder whose lease, right-of-way or easement i s to be affected. A l i s t of such designated operators and right-of-way holders i s attached (See Exhibit "B"). A copy of the return receipt showing data and signature as evidence of service upon such designated operators and right-of-way or easement holders w i l l be forwarded to your o f f i c e when received. In the event we cannot obtain the completed return receipt card, a l e t t e r from the designated operator or right-of-way holder or easement holder expressing no objection to the proposed project w i l l be obtained and forwarded to your o f f i c e .

Applicant agrees to be bound by the foregoing regulations and further agrees to comply with the applicable stipulations as set f o r t h i n the OCS Pipeline Procedures Guidebook dated March 4, 1984 and revised September, 1984.

The Company contact on technical points or other information i s :

Mr. Jack Horton, Engineer Walter O i l & Gas Corporation 1212 Main Street, Suite 240 Houston, Texas 77002 (713) 659-1222

Walter O i l & Gas Corporation hereby agress to keep open at a l l reasonable times for inspection by the Minerals Management Service the area covered by thi s right-of-way and a l l improvements, structures and fi x t u r e s thereon and a l l records r e l a t i v e to the design, construction, operations, maintenance and repairs, or investigations on or with regard to such area.

Please refer to your New Orleans Miscellaneous No. 730 for a copy of resolution approved by the Board of Directors authorizing the undersigned to sign for and on behalf of Walter O i l & Gas Corporation.

I f the above information meets with your approval, we would apprecicate your rendering the necessary decision f o r the right-of-way at your e a r l i e s t convenience. Inquiries concerning t h i s application should be directed to Judy Archer of th i s o f f i c e at (713) 659-1222.

Very t r u l y yours,


i f . C. Walter, I I I / President

JCW,III:JA Enclosures

UNITED STATES DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT SERVICE

NON-DISCRIMINATION IN EMPLOYMENT

As a condition precedent to the approval of the granting of the subject pipeline right-of-way, the grantee, Walter Oil & Gas Corporation, hereby agrees and consents to the following stipulation which is to be incorporated into the application for said right-of-way:

During the performance of this grant, the grantee agrees as follows:

During the performance under this grant, the grantee shall f u l l y comply with paragraphs (1) through (7) of section 202 of Executive Order 11246, as amended (reprinted in 41 CFR) 60-1.4(a)), which are for the purpose of preventing discrimination against persons on the basis of race, color, religion, sex or national origin. Paragraphs (1) through (7) of section 202 of Executive Order 11246, as amended, are incorporated in this grant by reference.


J./CT. Walter, I I I Pi«sident

October 8, 1990 Date

EXHIBIT "A"

GENERAL INFORMATION AND CALCULATIONS

1. The water depth along the proposed pipeline route and i n relationship to the natural bottom i s set f o r t h on the attached Proposed Mineral Development Plat, Sheet 2. The water depth i s (-) 73' MSL.

2. The description of the pipeline and coating i s as follows:

a. Riser Pipes: 4.500" O.D. x .337" W.T. API 5L Grade B or ASTM A-106 B Seamless or ERW. Bare weight = 14.98# per foot. Coated with 12 to 14 mils of Scotchkote 206N fusion bonded epoxy and .5" splashtron from the (+) 10' to (-) 10' elevation. Welded j o i n t s w i l l be protected with heat shrinkable pipe sleeves.

b. Line Pipes: 4.500" O.D. x .237" W.T. API 5L Grade B or ASTM A-106 B Seamless or ERW. Bare weight = 10.79# per foot. Coated with 12 to 14 mils of Scotchkote 206N fusion bonded epoxy. Specific gravity i n seawater (empty) = 1.53. Welded j o i n t s w i l l be protected with heat shrinkable sleeves.

c. Subsea Tie-In: 4.500" O.D. x .337" W.T. API 5L Grade B or ASTM A-106 B Seamless or ERW. Bare weight =14.98# per foot. Coated with 20 to 30 mils of Phenolic Epoxy Resin or Coal Tar Epoxy Coating. Specific gravity i n seawater (empty) = 2.13.

d. Internal Coating: The analysis of transported products w i l l be monitored and preventative measures w i l l be employed as necessary.

3. The proposed pipeline i s approximately 9,113 feet long. This does not include the +/-120, of r i s e r piping or +/-20, of subsea t i e - i n piping. The pipeline w i l l transport natural gas.

4. Valves and Flanges: Above water valves and flanges w i l l be 600# ANSI and below water valves and flanges w i l l be 900# ANSI Class with a designed working pressure of 1440 psig.

5. The design of the proposed pipeline i s i n accordance with the "Minimum Federal Safety Standards (Department of Transportation) T i t l e 49, CFR Part 192", Sub-Part "J".

(1)

EXHIBIT "A"

(CONTINUED)

6. The cathodic protection system for the pipeline w i l l use Galvalum I I I or Equal tapered semi-cylindrical bracelet anodes. Calculations are as follows:

a. Anticipated l i n e l i f e i s 20 years.

b. Assumed maximum of 2% bare pipe.

c. Current 5 MA/Sq. Ft.

d. 7.62#/Amp Yr.

e. Anode Spacing calculations:

Area/Mile = 5280 f t . / m i . x 3.14 x (4.500)/12 f t . = 6217.2 sq. f t . / m i .

Amps = 6217.2 sq. f t . / m i . x .02 x .005 A/sq. f t .

= .622 amps/mi.

Line L i f e = .622 A/mi. x 20 = 12.43 amp yr/mi

#/mile = 12.43 amp yr./mi. x 7.62#/amp yr. = 94.75///mi.

Anode spacing = (94.75#/mi.)/25# - 3.79/mi. 1393 f t .

Use one (1) 25# every 500 feet

7. The design pressure for the l i n e pipe and r i s e r :

a. Riser:

t = PD/2S p = in t e r n a l design

pressure = 1440 psig

= 1440 x 4.500/(2 x 17500) t = wall thickness, inches

= .185" - 1/16" CA. S = SMYS x .5 = 17500

= .248 D = nominal outside diameter - 4.500"

Use 4.500" O.D. x .337" W.T. API 5L Grade B or ASTM A-106 B Seamless or ERW.

(2)

EXHIBIT "A"

(CONTINUED)

Hydrostatic test pressure:

In accordance with Title 49 CFR Part 192, Sub-Part "K".

HTP = 1.5 x MAOP = 1.5 x 1440 = 2160 psig

b. Line Pipe:

t = PD/2S

= 1440 x 4.500/(2 x 25200)

= .129 + 1/16" CA.

= .191

P = internal design pressure = 1440 psig

t = wall thickness, inches

S = SMYS x .72 = 25200

D = nominal outside diameter = 4.500"




HTP = 1.25 x MAOP + external pressure = 1.25 x 1440 + 73 x (1.02)/2.31 = 1832 psig (use 2160 psig - same as riser)

Subsea Tie-In:

t = PD/2S

= 1440 x 4.500/(2 x 21000)

= .154" + 1/16" CA.

= .218"

P = internal design pressure = 1440 psig

t = wall thickness, inches

S = SMYS x .6 = 21000

D = nominal outside diameter = 4.500"




(3)

EXHIBIT "A"

(CONTINUED)

HTP = 1.25 x MAOP + external pressure = 1.25 x 1440 + 73 x (1.02)/2.31 = 1832 psig (use 2160 psig - same as r i s e r )

8. The hydrostatic test w i l l be conducted i n accordance with applicable regulations. Test duration w i l l be eight (8) hours. The test medium w i l l be i n h i b i t e d seawater. The test pressure i s less than 90% of the hoop stress using the steel's SMYS.

9. The specific gravity of the l i n e pipe was calculated as follows:

The l i n e pipe weighs 10.79 Ibs/LF

The pipe displaces .785 x 4.500 x 4.500 x 12/1728 x 62.4 x 1.02 = 7.03 lbs. water/ft.

Specific gravity pipeline empty = 10.79/7.03 = 1.53

The weight of coatings, anodes and other materials was not considered i n these calculations.

10. The design capcity of the pipeline i s approximately 10 MMSCFD natural gas.

11. The proposed pipeline w i l l depart from Walter O i l & Gas Corporation's West Cameron Block 254 "A" Production Platform and w i l l terminate at a 12-3/4" diameter subsea t i e - i n on Stingray's 36" diameter pipeline i n West Cameron Block 258.

12. Overpressuring of the pipeline s h a l l be prevented by three methods. F i r s t , a l l manifold and piping components connected to pressure sources sha l l be rated at or above the maximum rated pipeline pressure. Second, the platform vessels s h a l l have r e l i e f valves i n s t a l l e d which are set at or below the maximum rated pipeline pressure, i f d i r e c t l y connected to the pressure souce. Third, the platform s h a l l have both high and low l i m i t s on a l l pressure monitoring. High l i m i t s s h a l l be set no higher than 5% below the r e l i e f valve setting. Low l i m i t s s h a l l be set no lower than 10% below the operating pressure. The effect of any pressure exceeding either l i m i t w i l l be the automatic and orderly shutdown of a l l pressure sources on the platform.

(4)

EXHIBIT "A"

(CONTINUED)

PIPELINE SUMMARY

1. Line Pipe Specifications:

O.D. W.T. Grade

4.500" .237" API 5L B

2. Riser Pipe Specifications:

O.D. W.T. Grade

4.500" .337" API 5L B

3. Subsea Tie-In Pipe Specifications:

O.D. W.T. Grade

Length

9,113'

Length

+/- 120'

MAOP MOP

1440 psig 1348 psig

MAOP MOP

1440 psig 1348 psig

4.500" .337" API 5L B

4. Transportation Coinpany Line Specifications:

Length

+/- 20'

MAOP MOP

1440 psig 1348 psig

O.D. MAOP Pipeline Company

Stringray 36" 1348 psi

5. External Coating:

a. Line Pipes: 12-14 mils Thin Film Epoxy

b. Riser Pipe: 1/2" Rubber External

c. Subsea Tie-In Assembly: 20-30 mils Phenolic Epoxy Resin or Coal Tar Epoxy.

6. Cathodic Protection

25# Galvalum I I I or equal tapered Semi-cylindrical bracelet anodes every 500 feet.

7. Name of Product

Natural Gas having a Specific Gravity of .62 to .65.

8. Class Location

Class I

9. Governing Code:

T i t l e 49, Part 192 of the Code of Federal Regulations.

(5)

EXHIBIT "B1

The following Designated Operators and Right-of-Way Holders have been furnished information regarding the proposed pipeline i n s t a l l a t i o n by Cert i f i e d Mail, Return Receipt Requested (Note: The status of the block(s) l i s t e d below are current as of October 11, 1990 per telephone conversations with Ms. Diane Thigpin and Debbie Armond, with the MMS, and Judy Archer with Walter O i l & Gas Corporation.)

WEST CAMERON AREA

BLOCK 254

Walter O i l & Gas Corporation e None

OCS-G 7608 Designated Operator Right-of-Way Holder

BLOCK 258

Union Texas Petroleum Stingray Pipeline Company

OCS-G 11780 OCS-G 2122C

Designated Operator Right-of-Way Holder

BLOCK 259

Union Texas Petroleum Stingray Pipeline Company

OCS-G 11781 OCS-G 2122C

Designated Operator Right-of-Way Holder

BESTMHABtfCW*

_R/w_uurre_

ioo-t PROPOSED PIPEUNE

100'

"R/^TuMrrs RIGHT-OF-WAY DETAIL

\

255

258 \

UNION TEXAS PETR.

OCS-G-11780

REQ. Nb. 320 VALVE

BLK. 25401 0+00'

ING 52+97.31' :=1,408.089.06'

Y= 128.145.38'

:=1.411,249.00' v / Y= 132,397.00' Lot. 2? 0 1 ' 03.80r Long-gj1 10' 30.873^

254

WALTER OIL & GAS

OCS-G-7608

PROPOSED 4" GAS PIPELINE

TOTAL LENGTH = 9,112.89' =• 1.73 Ml.

X=1,406,209.76' Y= 125.616.83'

(VALVE) 91+12.89' X=1.4(55.813.00' Y= 125,083.00' Lot. 28- 59' 50.541" Lon9.9J 11' 30.75Cr

UNION TEXAS PETR.

OCS-G-11781

N THE RIGHT OF WAY OF PROPOSED PIPELINE IS ACCURATELY REPRESENTED

REGISTERED LAND SURVEYOR NO. 320 STATE OF LOUISIANA JOHN E. CHANCE tt ASSOCIATES, INC.

PLAN 2000 1000 2000FT.

THE DESIGN CHARACTERISTICS OF THIS PIPELINE ARE IN COMPLIANCE REGULATIONS.

SCALE

BOTTOM OF OULF-

y MIN COVER' RLP 'PROPOSED

PA TYPICAL DITCH DETAIL

NO SCALE

91 + 12.89' VALVE

0+00 BLK. 25401

UUP UUB

VATER UHE ff - 3 ' MIN. COVER 5' COVER

300' OUT

-FLOW

PROFILE 1000 2000FT. 50 lOOFT.

HOR. SCALE VERT. SCALE

APPLICATION BY WALTER OIL & GAS CORPORATION HOUSTON, TEXAS SEPTEMBER 3, 1990 SHEET 2 OF 2

PROPOSED 4" GAS PIPELINE

WEST CAMERON AREA GULF OF MEXICO

BEST AVAILABLE COPY

STINGRAY PIPELINE CO. 12"0 SUBSEA TIE-IN

ASSEMBLY W. CAMERON BLK. 258

} t BALL VALVE (WxF)- 1" PLUG—v \

T BALL VALVE (WxW tt WxF W/BLD.)

EXIST. 36*0 STINGRAY PIPEUNE

EXIST. 1? BALL VALVE

1. WALTER OIL & GAS CORP. PIPELINE COMPUNES WITH PART 192, TITLE 49 OF THE CODE OF FEDERAL REGULATIONS.

2. WALTER OIL & GAS CORPORATION PIPELINE COMPUES WITH API RP 1111 REGULATIONS.

3. WALTER OIL tt GAS CORP. FACIUTIES COMPLY WITH API HE REGULATIONS

4. HIGH PRESSURE SENSOR (PSH) ON UNE WILL BE SET AT 1250 PSIG.

5. LOW PRESSURE SENSOR (PSL) ON UNE WILL BE SET AT 850 PSIG.

6. DESIGN PRESSURE OF THE PIPEUNE IS 1440 PSIG

7. A = SACRIFICIAL GALVALUM III OR SEALLOY ANODES, 25# EACH, SPACING TO BE A MAXIMUM OF 500 FEET.

8. MOP OF PIPEUNE UMITED TO 1348 PSIG DUE TO MAOP OF 36"* STINGRAY PA

9. All SUBSEA VALVES ARE TO BE ANSI 900f UNLESS OTHERWISE NOTED.

10. ALL PLATFORM VALVES ARE TO BE ANSI 600# UNLESS OTHERWISE NOTED.

CVI

0 •

1 s 55

SUBSEA TIE-IN: 4.500" O.D. X .337" W.T. API 5L GR. B OR ASTM A-106 GR. B SMLS

UNE PIPE: 4.500" O.D. X .237" W.T. API 5L GR. B OR ASTM A-106 GR. B SMLS

RISER PIPE: 4.500" O.D. X .337" W.T. API 5L GR. B OR ASTM A-106 GR. B SMLS

•RISER PROTECTED BYi FABRICATED PIPE RISER GUARD

WALTER 01 ft GAS CORP. W. CAMERON BLOCK 254 "A* PRODUCTION PLATFORM

{ Ag) TO PLATFORM SAfEIY SYSTEM ^ • m m UMFOID - ( P S H L ) - - ^ - - ^ - - ^ - 1 - - ^ ^ 1

W f (PSV

•1 3 tei

PROD. SEPARATOR 24"* x lO'-CT

144011 W.P.

COND. SALES METER

—

CORRISION INH. TANK

OLIVIER REG No. 13/37 5^ tj

REGISTERFD ff 'K Q Professional Engineer < ^ >

"^S^ OCTO4 /O o Y/fd NUNENTAL ENOINEERINO

1 * CONSTOUCTIONJ \SERV1CES. iNOi^

WALTER OIL ic GAS CORP.

Q 4.500" O.D. GAS PIPELINE WEST CAMERON BLOCK 254 TO

WEST CAMERON BLOCK 258 GULF OF MEXICO

9-25-90 551-SK-001

NEW EXISTING EXIST. 36"

STINGRAY PIPEUNE

NATURAL GUlf BOTTOM

4" ANSI 900# SWIVEL FLANGE

EXTEND SANDBAGS Z'-O' BEYOND BALL VALVE 4" PIPELINE FROM

WEST CAMERON BLOCK 254 "A"

O 1

vn NEW EXIST.

NEW PA CLAMP-'

^

I ^ - N E W PA CLAMP

3 - 2 13/16"

J L

PLAN SCALL* 1/4" = 1-0" 10*-9"-

SEQTION W SCALE: 1/4" = I'-O" OCT 0 4 itfU

1. BACKRli ALL EXCAVATION WITH SANDBAGS (SAND ONLY) TO CLOSE THE HOLE TO THE BATTOMS NATURAL CONTOUR.

2. SANDBAGS OF CEMENT AND SAND MIXTURE ARE TO BE USED TO SUPPORT NEW VALVES.

BEST AVAILABLE COPY

CONTINENTAL ENGINEERING k CONSTRUCTION SERVICES, INC.

wan WALTER OIL & GAS CORP.

4" SUBSEA TIE-IN TO 36" STINGRAY PA WEST CAMERON BLOCK 258

I ttMti I tttatort I fait I Mt I amm: J. Lotlolals

IQUSAHA

tUMtor.—

Imaiam.—|

o.ao.

NOTED 1 9-24-901 MI-SHXtt | ^

(TYP.) 6" 3R 45* ELL (TYP.)

SEE CLAMP DETAIL

6" ANSI 150# RF SLIP ON FLANGE

(TYP. 8) SEE HINGE PL DETAIL

1 1/2"

UPPER PLAN LOWER PLAN

DOUBLER PL 3/4 x 18" x 22" ROLLED TO FIT 42 1/8" I.D. (TYP. 2)

_ | ELEV. (+) 6'-0'

(| ELEV. (+) 4'-0"

tf'-O" UML ElEV. O'-O-

6 5/8" SCH. 80 3-R FABRICATED PIPE BEND

(TYP. 2)

ELEV. (-) 4'-0'

_ ( ELEV. (-) 6'-0' _

BEST AVAILABLE COPY

6" 150# ANSI RF SUP ON FLG. (TYP.)

HINGE PL DETAIL SCALE 11/2" = I'-O"

TYP. 4

4 1 1/8" O.D. x 1 3/4" SLOTTED HOLES FOR F 1" O.D. x 6" LG. STUDS W/ 4 H.H. NUTS &

(2) 2 1/2" O.D. x 1 3/16" l.D. TEFLON COATED FLAT WASHERS (TYP. 2)-

ST1F PL 1/2 (TYP.)

42" O.D. PILE

1/2" (TYP.)

HINGE PL 1/2 (TYP.)

ELEVATION "C N.T.S.

3/4" CLAMP PL I.D. = 1-9 1/4" R.

CLAMP DETAIL SCALE 3/8" = I'-O"

1 1/8" O.D. HOLE FOR 1" O.D. x 6" LG FULL THR'D STUD BOLT W/4 H.H. NUTS EA.

(TYP. 3 PLACES)

42" O.D. PILE HINGE PL 1/2 (TYP.)

» r \ » ELEVATION "D N-T-s- OCT 0 4 mo

n . n ELEVATION "A SCALE 3/16" = I'-O"

ELEVATION "B" SCALE 3/16" = I'-O"

1. ALL STUDS , NUTS k FLAT WASHERS TO BE IMF COATED OR EQUAL

2. BLAST k PAINT AS PER CE&CSI SPEC. NO. 002 3. ALL WELDS TO BE FULL PENETRATION,

UNLESS OTHERWISE NOTED

CONTINENTAL ENGINEERING CONSTRUCTION SERVICES, INC.

UfAYETlt LOUSANA

WALTER OIL & GAS CORPORATION O U M V U RISER GUARD FOR 4" RISER xemcADai WEST CAMERON BLOCK 254 "A*

w NOTED

I M : 9-26-90

OMSlBt.

nam on

aim an

551-SK-0O3 A Kit

420 PILE

F/F EL(+) 45-6"

BILL OF MATERIALS ITEM i. 2. 3.

4. 5.

6.

7. 8. 9.

3" SCH. 80 BRACE

QTY. 130'-0"

1 1

1 8

2 1 1

DESCRIPTION PIPE: 4" SCH. 80 BORE, ASTM-Al 06 GR. B, SMLS FLANGE: 4" ANSI 600# RTJ WN, SCH. 80 BORE, A-105 FABRICATED PIPE BEND: 4" SCH. 80 BORE, 5-R 90' WITH S'-O" TANGENTS BOTH ENDS, BEVELED BOTH ENDS, A-106 GR. B BALL VALVE: 4" ANSI 600# RTJ. SCH. 80 FxF, FULL OPEN, CAMERON. STUD BOLTS: 7/8" O.D. x 6" LONG, B-7 ALLOY STEEL WITH 2 H.H. NUTS EACH, IMF3 COATED OR EQUAL. STUD BOLTS: 7/8" O.D. x 7" LONG, B-7 ALLOY STEEL WITH 2 H.H. NUTS EACH, IMF3 COATED OR EQUAL. RING GASKET: 4" ANSI 600# R-37, S.S. INSULATING FLANGE KIT: 4" ANSI 600# RTJ NEEDLE VALVE: 1/2" 3600 PSI, M x F, 31/26 S.S.

(Jl 1/8" O.D. DRILLED HOLE FOR 1" O.D. x 6" LG. STUD BOLT

W/ 4 H.H. NUTS EACH (TYP. 6)

1/2" ST1F PL (TYP.)

3" SCH. 80 BRACE

1/2" ST1F PL (TYP)

1/2" ROLLED PL

i . i

SECTION 'A

FOR CONT. ft PIPEUNE Bill OF MATERIALS SEE DRAWING NO. 551-SK-010

Qui 04 isyo

GO

O

1. CONTACTOR TO FIELD VERIFY LENGTH OF RISER k ELEVATION OF CLAMPS. 2. FOR RISER CLAMPS SEE DRAWING NO. 551-C-301 & 551-C-302

BEST AVAIUBLE COPY

KEY PLAN DAIE REVISION BY:


LAFAYETTE LOUSANA am WALTER OIL ft GAS CORPORATION

DETAIL FOR 4 1/2' O.D. RISER WEST CAMERON

3M: BLOCK 254 'A'

N.T.S. 9-25-90

pmjtaoc

D.aa

551-R-201 A

BEST AVAILABLE COPY

.1 WPELXNS WGHTOF-WAY AffUCATlON TNCXNEEMNC CBECXUST*

/ 0 -22-9o

A. DMcrfption of pipeline md locadon of propoeed roote (U., *e of pipe, prodaci to be tra reported, from where to where, platfom •unbar, una, block piaber, araa, md dte* lance fa feet and • f l e a ) : - ,>cU CjCiS±Cos). pip^tiA^ ,-C^^x LJ^Ht^

Safety Flow Schematic - Verify that the InforautloB *OWB oo Ae nfety Oowactanatk diagram contains the foUowfaj:

1. franre soorce k dnwa into the Khenutk wi0i fee followinr

a. ^> ) Jk>pc.ArJti\^

b. design workini preoDf*.

c. high-low pmnre tensor Mttinp.

"ANSF ntinp of aD nhes, flanfet, and fittinp betweea tfie soorce and the eonnecting pipeline are dtown. j Q

treamre relief vahes, where applicable, are riiown wiA the setting set no higher than the maxknum working ptassure (MW?) of tha taawl.

If the maximum input source pressure is greater tfun 0ie maxfannn allowable openting pnssun (MAOP) of die pipeline, redundant safety equipment Is

MAoP ^^ 735d AOP of proposed pipeline does Mt txcood MAOP of eonnecthg pipeUne.

The pipeline leaving At platfonn nctMng production fnm the platfonn Is equipped with high-Jow pnssun sensors to directly tr indirectly tfiuHn the weO or weOs on the platfonn.

7. Hie pipeUne delivering production to the produciion facilities on the platfonn is equipped with an automatk faO-close vahe tied inio the automatic and nmote ahuHn lysttm.

1. The pipeline crosing the platform which dots not deliver production to the pbtfonn. but which may or may not nctht production from At platfonn. Is oquipped with high-low pressun nnson connected to an automatic faO<lose valve located in the upstnam portion of the pipeline at tht platfonn. In addition, the nnson an tkd into either Ae plstform's automatic and remote shut-in system or an independent remote ihut-fo system.

BESTAVAILABIJ

JO. Tbtpfee&ntkavfaj tha platfom beqdppadvi* a chaeknha.

oa fta dcpstfoi pipcSnt b locatad J l . /Tb t fcfcMow p m i t Ac chock vaKe.

J l Whm appBcabk, hbWow aeaaon an located do nfuiator.

,13. Jf then b Bquid (Yes or No)

oa into Ac Mae, an puapi

of Ae bock

tad with Ae btiecifaa?

M^Diiection of flow iodkatad.

iSr^fjp* ecWcadon (La^ riza, frade, wtifht, aad wall Afcl

leagth of propoeed pipeBae (feet aad alae).

MAOP of eonaeetlng pipeline.

18. Sutement Aat dedgn meets or exceeds DOT Regubtions 192 or 195. ss applicable, and/or applicabb OCS orden. ngbtand engineer's aeal ngbtntion

bcr, date, and signature.

9. Ana and block number of proposed pipeline/pbtf<

20. Cathodk protection spedffcstions.

C Oesign Information • Verify Aat Ae pipeUne desifn bfonnatioa fbca ht Ae application and/or on the data sheet b compku and correct:

1. Product to be tnnsported:

2. Pipeline, rber. and subsea vahe asaeably ^^ka tkns :

(1) Sbe dL^-WaDTTikknen '^ZL Gnde J i .

(2) Sbe

(3) Sbe

(DSbe.

(2) Sbt.

(3) Sbe.

6

WaB Tbkkness

WaO HUckncsi

WaD llikkacss

WaB Hibkiiess

WsO Hikkncss

bly:

.Gnde.

.Grade.

^ 1 Gnde — L L Wtight 11 Ibs/ft.

.Grade.

.Grade,

Weight

Weight,

Wtight.

, Ibs/ft.

.As/ft.

e. Substa vaht asstmbiy: ^

(11 Sbe d ^ - WaB Hikkneas - Zcndt J 2 . M36

.Weigh l Ibs/ft.

(2) Sbe W.D Thkknea .Gnde. .Weight. .Ibs/ft.

BEST AVAILABLEJOPY

4. Typ* of corroriofl pivfctlon

a. ipprmia cnnwit tytum

b. Sacrtffcfel nod* qntn

(DTypcofuiode.

(3) SpodnsfaitOTa) i

(3) Wdiht of onh anode gKen by applicant -2$ c. If platfonn anodes aie aaed. are they conaideied adequate?

N o _ _ _

d. If pipeline anodes aie i

Foimula: Lap/,•3.I2*IO4*H^/DIR*

Where: W0 - We%ht of Anode anh (lbs) D "Dia. of pipe (inches) 1 • Separation between anodes (ft.) R • the foOowini Ibs/amp/yaar (Rate of Coaanaptioa) Ahiminum or CaKahim • 74 Zinc •26 Maineshim • 17 J

Docs the calculated Uf expectancy equal or exceed 20 yean?

Yes No _ _ _

ription of protectKe coating:

a. Pipeline 12. \o H/vi.'lJ epowj

b. Riser /2. *>H xte efioKy * '^"V^M^n c. Subna vaKe asstmbiy ^ bo ^

Description of weighted coating:

a. Preconcnte coating

b. Density ofconcnte

c. Hikknea ofconcnte.

d. Tbkknea of asphalt.

7. Calculate the *cctfk gravity (one of the foOowing formulae may be used)

BEST AVAILABLE COPY

•.FottpoxycMtfag: SG-ltftSW/lP .5-h. Deadly eenparboa with flaid materkl: tC« W4f

A

c Uaee whh a pecifk thk|iiea of

SG«RC» Xt /WfT-RC R (T-Kl^yKj R

d. Uaee havfa| two eoetfap of coatiAg:

SC«W»P

^3

and a feh wnp, or ealy aephataustk

When: SG* ipedfk gnrity RC • dendty of concntt (Tb/ea. ft) Kt.Ki.Kt-cotffkknts T-thKknea i of concnte coating (MMS) W • weight of ban pipe (lb/ft) P" weight of coating R • dendty of fluid material (Ib/ca. ft); I A , aaa wattr • 64 Ibs/eu. ft. D • diameter of pipe (inches) A • croa-sectional ana

8. Gfrensjn flc gnvity

,c..

9. Gravity or density of producKs)

10. Dedgn capacity of pipeline

un: Line Piae ^ Hold Time hn. .11. Given Hydrostatk Test Pnssun: Line Ptoe/ Hold Thne

W - r ^ ^ H o l d T l m e ^ - b n . PninsuDation Test.

Recommended maximum hydrostatk body Mat for ANS eaKes. flanges, and fittings an as foDows:

ANSI 300 -1,100 pdg ANSI 400 > 1,4SO psig ANSI 600-1175 pdg ANSI 900.3450 pdg ANSI 1400 * 5,400 psig

BEST AVAILABLE COPY

Not*: Miaimaa hold

Um ftp*-Ihn. 4bi*.«13S%ofMOr Raer • 4 ha. (ptotat) liquid" Pfcis4liiv€ 110*if)s*k or DOT 192.507(e) tk» k aot vtebk du*if

J2. Muimam ASowibk Opcntini Pnaun (MAOP) of Iha pipe:

MAOP«2it»F»E»T Note: F«.72;E« l;T« 1

b^MAOP- 2i^A c. MAOP • '

.13. MAOP of rker pip*.

Note: F • .50 for risen on nstunl pi trsnsnissloa Haes. Note: F-.60 for risen on liquid pipelines.

MAOP- ^3^ccoX.337] , 6 z ^ z x ^ 0 ,

b.MAOP- Z ^ 2 - '

14. MAOP of flonps, flninp. and valves:

2.4 x ANSI ntini« 4 4 0 15. MAOP of propoied pipeline a detemineCin accordance with Title 49 CFR Pkrt

95orl92.aapplkable.is I l V f f t po| - | , e - « ^ ^ I

16. Items 12, 13. and 14 above an equal to or aon Aan Ae auxbnom allowable wprkini pnssun (MAWP) of source.

.17. Verify: 1:25 maximum source pnssun (MSP) < hydrostatk test pnssun (HTP) < .95 (smaller IP # SMYS of Hems 12 or 13 above)

- - ^44^ - ,3503 Note: The ncommended Hmit of lest a a percentap of iatenul pressun ? specificed minimum ykld stnn|A is equal to 95'/*:

IP*SMYS"2xsxi-

.18. Verify MAOP does not exceed the lownt ofthe foOowini: _ <-i

a. Suomerpd components: I1TP/145 • ^ J j - ^ O '

b. Riar: HTP/1.5- " ^ T ^ ~

lad: YM BEST AVAILABLE COPY

fee tort] pfpcKitM wffl be totalled or hid te a mWnmaofdim fart btlow >f the modline oot to aad Inchidini die 200 foot water depth, aeept at

croaiap. Aay deviatioa mnct be Justified at the that of applicatioa.

All vaKa md topi atoit be provided with a abihaua of Ane feet of actual cover either with sofl or andbap or Jetted to a ainimtnn of Ane feet below the mudhne. U4mS approved vahe protection coven m aaed. Ae vaha md taps an NOT required to have a minimum of thne feet of acaal com or Jetted Arte feet below Ae mudline. However, Ae top of Ae vahc protection com AaD aot protrude sbove Ae level ef Ae aodliae. Aay deviatioa aast be Jutt fied at Ae Aac of application.

E. Pipeline

AD pipefine croainp In water depths ap A and fadadins 200 feet AaS be ccmcnt-baifed wiA a minbaum of 18 incha between Ae Una with the apper* most line havbtg a minfcnum of 3 feet of oova hi Ae form of cement bap tn-staOed so as to provide s Ane foot horbontal to a one foot vertkal (3:1) slope with e crown width Aat is one and one-half (IH) Aaa Ac pip* diameter. Any devkdoa must be Justified at Ae Aae ef applicatioa.

AD pipefine croainp bi water depths ptater Aan 200 fttt AaD be cement baued wiA a minimum of 18 Acha between Ae Una snd instaDed so u to provide s Ane foot hoibontal to a one foot vertkal (3:1) slope. Any devbtion mustjbe Justified st Ae Ane of appHcatioa.

F. Const

1

a Infonnation:

Propoied coastnicdoa cc amtntdatt Dec 'SO 2. MeAodofcoastnictfon

ethod of burial

e required to hy pipe

$. Time nqulnd to compkte project 3 t p e e t e

C. AppUcsnt complies^iAcurreat OCS pipeline giridcHaa:

UNITED STATES GOVERNMENT MEMORANDUM

October 25, 1990

To: Regional Supervisor, Field Operations, GOM OCS Region (MS 5200)

From: Regional Supervisor, Leasing and Environment, GOM OCS Region (MS 5400)

Subject: National Environmental Policy Act Review for Pipeline Right-of-Way Application OCS-G 12697

Our National Environmental Policy Act (NEPA) review of the

subject action i s complete. Environmental protective measure(s),

i f any, identified to avoid or mitigate potential impacts

associated with the action were included as part of the NEPA

analysis and are shown on the Categorical Exclusion Review (CER).

5 Adams

Attachment

cc: Pipeline F i l e OCS-G 12697 (MS 5440)

Action No. OSC-G 12697

United States Department of the Interior Minerals Management Service Gulf of Mexico OCS Region

NEPA CATEGORICAL EXCLUSION REVIEW

The Categorical Exclusion Review (CER) evaluated the proposed action(s) and determined that i t meets the categorical exclusion c r i t e r i a as defined by 516 DM 2.3A(1) which states 11 (a) The action or group of actions would have no significant effect on the quality of the human environment, and (b) The action or group of actions would not involve unresolved conflicts concerning alternative uses of available resources." The exclusion of this activity from future environmental analysis i s conditioned on the imposition of the following mitigative measure(s). These measures are to ensure environmental protection, consistent environmental policy, and safety as reguired by the NEPA.

Environmental Protective Measures

The following measure was identified in the plan/application by the lessee/operator submitting the proposal: None.

The measures identified by MMS during the plan/application review or in the lease stipulation were:

Our analyses indicate the following as potential hazards to the proposed a c t i v i t i e s . Therefore, precautions in accordance with NTL No. 83-3, Section IV.B, w i l l be taken prior to conducting operations.

Pipelines

Name

Stingray

Diameter (inches)

36

Block

258

Area

West Cameron

Exclusion Determination

The proposed action was evaluated and reviewed against the CER exception c r i t e r i a defined by 516 DM 2.3.A(3). With inclusion of the above mitigation, i t does not represent an exception to the categorical exclujjujns. Therefore, preparation of an EA i s not required.

Preparer Date 21

.Chief, Environmental Operations Section

I concur.

'Date ional Supervisor, asing and Environment

FIELD OPERATIONS . v>West Cameron Area Lease OCS-G 7608 To A 36-inch SSTI Block 258 West Cameron...

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