DISCOVERYPRODUCER SERVICES LLC

120 Mallard Street, Suite 300, St. Rose, Louisiana 70087

(504) 712-5600

November 2, 1998

Mr. Donald C. Howard, Regional Supervisor United States Department of the Interior Minerals Management Service Gulf of Mexico OCS Region 1201 Elmwood Park Boulevard Harahan, Louisiana 70123-2394

Attention: Mr. David Izon

Subject: Completion of the Modification of a 12-inch O.D. Natural Gas andCondensate Pipeline for Discovery Producer Services LLC, Right-of-Way OCS-G 16054, Segment No. 11919, in and/or through Federal Waters, Gulf of Mexico, Offshore Louisiana.

Dear Mr. Izon:

On behalf of Discovery Producer Services LLC, this correspondence serves as written notification of the completion of work associated with the above subject project. The pipeline modification work was performed as detailed in the Right-of-Way Permit Application dated and submitted to the Minerals Management Service on May 13, 1998, supplemented July 1, 1998, and approved by same on July 10, 1998. The sector of pipeline removed from service from Block 209, Lease OCS-G15324 to Block 207, Lease OCS-G12025, all in the South Timbalier Area designated as Segment No. 11044, was placed in a Temporarily Out of Service condition as detailed on the Right-of-Way Permit Application dated and submitted to the Minerals Management Service last week.

Construction was completed on August 25, 1998. Attached you will find three copies of the As-Built drawings for the modifications to the pipeline at the Grand Isle Area Block 104 Platform A, Lease OCS-G-14560 and at the 30-inch SSTI Block 209 South Timbalier Area, Lease OCS-G15324, Segment No. 11161, Right-of-Way OCS-G- 16093.

Also attached are three copies each of the hydrostatic test results and the instrument cafibration reports.

November 2, 1998 Mr. David Izon Page 2

Should you have any questions or require further information, please contact Mr. Leigh Larson, Project Director, at Project Consulting Services, Inc. (504) 833-5321.

Sincerely,

Discovery Producer Services LLC

Cst*) 7li-Project Manager

LL/jm

Enclosures

cc: Larry Johnson, Bridgeline Gas Distribution LLC - w/oLeigh Larson, Project Consulting Services, Inc. - w/o PCS File 97172

DownHole

Pressure, Inc.INSTRUMENT RENTALS & REPAIRS

1036-A South Cruse Ave. Broussard, LA 70518

Phone (318) 837-2755Fax (318)837-2756

Surface Gauges Dead Weight Testers

Barton Recorders Vaetrix Gauge 1

5, 10 & 20.000 PSI

Sub Surface Gauges Electronic & Mechanical

0-25.000 PSI Ranges Temperature Gauges

0-450 Degrees F.

CALIBRATION CERTIFICATE

VAETRIX GAUGE 1

SERIAL NUMBERicmi^

PRESSURE RANGE/0J Q-fiO PS,

r>

Calibrated in Vertical Position Temperature F.

This is to certify that this instrument has been inspected and tested against Pressure Standard Chandler Engineering Dead Weight Tester Model # 58-200H, Serial # 16210 traceable to the National Institute of Standards and Technology, NIST Reference ft 105, Procedure # MTP-132. Calibration Certification No. 031798-01. The calibration system conforms to the requirements of MIL-STD. 45662A as ISO-9000 procedures. Date Calibrated (03/23/1998).

Special Conditions:

DATE OF CALIBRATION TECHNICIAN

DownHole

Pressure, Inc.INSTRUMENT RENTALS & REPAIRS

1036-A South Cruse Ave. Broussard, LA 70518

Phone (318) 837-2755Fax (318) 837-2756

Surface Gauges Dead Weight Testers

Barton Recorders Vaetrix Gauge 1

5, 10 & 20,000 PSI

Sub Surface Gauges Electronic & Mechanical

0-25,000 PSI Ranges Temperature Gauges

0-450 Degrees F.

CALIBRATION CERTIFICATE

BARTON METER

SERIAL NUMBERcJ'/j-E' S'IJOS'PRESSURE RANGE So 00 psi

Calibrated in Vertical Position Temperature F.

This is to certify that this instrument has been inspected and tested against Pressure Standard Chandler Engineering Dead Weight Tester Model # 58-200H, Serial # 16210 traceable to the National Institute of Standards and Technology, NIST Reference # 105, Procedure # MTP-132. Calibration Certification No. 031798-01. Date calibrated (03/23/1998). The calibration systems conforms to the requirements of MIL-STD. 45662A as ISO-9000 procedures.

Special Conditions:

DownHole

Pressure, Inc.INSTRUMENT RENTALS & REPAIRS

1036-A South Cruse Ave. Broussard. LA 70518

Phone (318)837-2755Fax (318)837-2756

Surface Gauges Dead Weight Testers

Barton Recorders Vaetrix Gauge I

5, 10 & 20,000 PS1

Sub Surface Gauges Electronic & Mechanical

0-25,000 PSI Ranges Temperature Gauges

0-450 Degrees F.

TEMPERATURECALIBRATION CERTIFICATE

BARTON METER

SERIAL NUMBER RANGE_ DEG. F

Calibrated in Vertical Position

This is to certify that this instrument has been inspected and tested against Digital Thermometer No. 301800, Calibrated (05/08/1998). Traceable to the National Institute of Standards & Technology (NIST). Lab Accurate Digital Thermometer Mobil TM 99 (Post Thermometer). Serial No. 188320.

Special Conditions:

DATE OF CALIBRATION 7- 7- f / TECHNICIA

02-Jun-0 TIMS.PPL MASTERS03 Data Entry/Change Sheet

Screen 1

Segment Number: 11919 — Comes From —

ROW Number: G16054 Id Name: A

Operator Code: 02273 Lease Number: G14560aggaMPiscoveiv Producer Services LLC

Area Code: GI

ROW Permittee: 02273 Block Number: 104^^^BOisco.eiv Producer Services LLC

— Goes To —

Approval Code: R Id Name: 30 SSTI

Authority Code: TLease Number: G15324

Size Code:

Product Code:

12

G/CArea Code: ST

Alt Product Code: Block Number: 209

Screen 2

Segment Length: 68514 Buried Designator Flag: Y

Fed + State Length: 68514 Recv MAOP: 1850

Pipeline Approval Date: 7/10/1998 Recv Segment Number: 11161

ROW Issue Date: 7/12/1996 MAOP Type: O

Init HTP Date: 9/29/1996MAOP (Pressure): 1850

Recent HTP Date:Departure Flag:

Anode Inst Date:Pipeline Status Code: PROP

ROW Status Code: ACTCathodic Code: A

Leak Detection Flag: NCath Life Time: 20

Map OPD Number:Bidirectional Flag: N

Board PL SDV Flag:Liquid Sys Dcsig Code:

Board PL FSV Flag: N

Gas Sys Desig Code: Abandon Apr Date:

Minimum Water Depth: 177 Abandon Date:

Maximum Water Depth: 200 Abandon Type:

813 Pipeline Permit Tracking Screen|j 016054 11919 12 GC Gl 104 A SI 209 30 SSI PTffili rtlFftlj

Record! Nj

Permit Type Date on DateApplication Received ROW Ho. Operator ^ Engineer

>««»»

ms>f ,,To Date

Signature: Approved:

j{;n 3.-1996 /l 996 pi 605 4 pscovery Producer S

Description of Pipeline:

I??* ni •,«■ “&e* iso,.

HEPA Review (MS 5440} MHazards Review (MS 622?> M FWS JM

HMJS m

ADJUDICATION (MS 6421i ^Platform Verification j|Wstrict

Application Fee (Denver)

Print Trans Memos

On Shore Base:

Comments Requested bjR

Engineering ok Hd

General Remarks;

Verbal Approval? Completion Report

Report Report ReportDate Received To Type

llAwlSwl 1 JiuJn^yd I 11 R&n333

Report Report To Accepted

Address

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X= 2,398,627.73’Y= —80,372.21'

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COORD N A

TIE«ltBEND

M.AM>

10

II12

13U151617IB19202122232425262720293031323334

X COORDINATE2,433,992'2,433,990'2,433,982'2,433,8952,433,8092,433,7292.433,4812,433,2452,432,9632,432,760 2,432,507* 2,432,230' 2,431,994 2,431,703’ 2,431,499’ 2,431,240’ 2.430,990’ 2.430,753' 2,430,520'

Y COORDINATE00.750'00.003'00.003'00,007'80,005’80,000'

-00,007-00,799-00,793-80,000-80,791-80,787-80.786-80,793-80,786

2,430,2572,430,0142,429,7742,429,5192,429,190’2,420.032;2,420,653'2,4211,390'2,42(1,142'2.427,855' 2,427,649' 2.427,410' 2,427,161T

2,426,8842,426,670

91

00,78660,779'00,767'00.769'00,752’00,760'80.760'

-00,754-00,746-00,750-00,741-00,741-00.741

00,736•00,739’00,733'00.730'00,730’-00.710'

TIE363738 39^ 40 43 42_4344454f5474044)50515253 54_ 55 50 5^ 5859

JK)

J1Ji2m6465qE676fJ_69^A

X COORDINATE Y COORDINATE2,436,022'2,485,728’2,425,441’2,425,237’

2,424,9972.424,703'2,424,450’

-00,704’-00,718'-00,707'-00,692'-00,705'

-00.711-00,700

2.424.219’ -80,6892,423.977’2,423,7262,423,4322,423.104’2,422,000'2.422.4952,422,240'2.422.070'2,421.760'2,421,442’

2,421,1072,420,9392,420,6963,420,4532,420,216'2,419,8902,419,494'2,419,266'2,418.930'2,418,763'2,418.516'2,418.192'2,417,944’

2,417,6912,417,4462,417,200

-80.692-00,692-80,685-00,609’-00,675-00.601

00,667 00,664' 00.654' 00,665" 00,646’

-00,645-00,043-00,640-00,040-00,636-00,620-00,626

00.62600.620’00.623’00,622'80,633'-80,600’

-80,601-80,589

Mim -80.602

TIE7172737475 7077707900810203048586

0700099091

X COORDINATE2,410,7032.41 6,5012.418,175'2,415.0(13’2.415.510’2,415,220’2.414,963’2,414.745'2,414,4652,414,2642.413.9772.413.5232,413,2042,412,9742,412,7402,412,490

9293949596979899100 101 102 103104105

2,412,2542,412,014'2,411,649'2,411,'HQ' 2,411,170’2,410,9252,410,6042,410,3612,410,1102.409,7942,409,4602,4 09,139 2,408.773' 2.400,415’ 2.400.207' 2,407.871’ 2,407.552'2,407,302

Y COORDINATE-80,602'-80,609’-80,607-80,594’

80,57500.579'00,579'00,573

-00,574-80,572-80,570-00,566-00,557'-00,555'

-00,550-00.542'-00.540 00.539 00.539 00.532' 80.545'

-80,644-80,541-80,617-80,633-80,516-00,503

00,51300,497'00,502'00,503’

-00,506-00,479'-00,400

TIE10610710810911011

113114115

X COORDINATE2,400,81 52,406,4942,406,1802.405,9722,405,8692,405,739’

116117110110120

121

122123124125126 127120

129130131132133134135136137

130

m

8,405,513 2,405,263' 2,405,101'2,404,9392,404,609'2,404,3362,403,8992,403,5752,403,2102,402,7262,402,2382,402,0322,401,7052,401,467’2,401,207'2,400,959'2,400,717'2,400.5102,400,2002.399.9012,390,7562,399,551 2,390,302’ 2,399,051 ’ 2,390,921 2.390.003’ 2.390.54 5’2,390,357

Y COORDINATE-00,473'

-00,467-00,488-80,473-00,409-00,471-00,471-00,470-00,462

00.450-00.456'-00,453'-00,440-00,420-00,440-00.433-00.420-00.420-00,401-00,396-00,370

00,40300,391’

-00,392-00,409-00,391-80,301-80,391-80,393-80,397'-00,393

00,37300.371'00,360

TIE141142143144145146147140149160151162153154155150157150159160161162163164165

167160169170171172173174A

X COORDINATE2,397.955'2,397,709'2,397,417'2,397,177'2,396,926'2,396.637'2,396,4752,396,1632,395,9332,395.000’2,396.477’2.396,232'2,395,036’2.394,730’2.304.400'2,394,230’2.393.990’2,393,690’2.393.463'2.393.2442,392,994'2,392.660'2,392,467’2,392.216'2,391.090'2.391,562’2,391,191’2,390,905'2.390,735'2,390,5342,390,369'2.390,121'2.309,913'2.309.660’

COORDINATE-00.374'-00.363'-00,367'-00.365’-00,350’-80.357'-80.356’-80,344’-80.342’-80.326’-80.341-80,329'-00,329'-00,320'-00,327'-00,324’-80,320'-80,290'-80,316'-80,310'-80,298’-00,306-80,300'-00,200'

-00,297'-00,305-00,201-00,203'-80,202'-80,276-00,272'-00,273-00,260-00,264

TIE

B L EX COORDINATE

176177170179100181102

183184185106107100109190191192193194195196197198199200201202203204205206207200

209

2,309.167'2.300,924’2.300,556'2.300.264'2,300.014'2,387,766'2.387.519'2,387,232'2,306,982’2,300.611’2,306.444'2,306,230’2,305,912’2,305,669’2,305,450’2,305,200'2,304,746'2,304,464'2,304,266'2,303,936'2,303,709'2,383,490’2,303,301'2,302,960'2,302,6492,302,2052,302,0022,301,769'2,381,6112,301,2662,300,9012,300,7212,300,4032,300,196

Y COORDINATE-80,261-00,259'-00,254-00,244-00,223-00,242-00,244’-80,239-80,236-80,224'-80,230'-00,222-00.226-00,217-00,223-00,219-00,207-00,190-00,202-00,194-00,202-80,186-00,106'-00,190-00,192-00,100-00,190-00,200-00,100-00,199-00,145-00,150-00.154’-00,150

TIE211212213214215216217218219220

221222223224225220227220229230231232233234235236237230239240241242243244

x coordinate:2,379,7402,379.4132,379,077'2,370,7492.370,417'2,370,0942,377,0702,377.5482.377,3032.377,0532.370,047'2.376.5972.370.2662.370.0132.375,5902.375.3532,375.1072.374,6962.374,2792,374,0332,373,7472,373.4942,373.240'2,373,002’2,372,760’2,373,4602,372,2992,372,0122,371,6742,371,2592,371,0142,370.7292,370,447’2,370,240’

"COORDINATE

-00,147’-00,143’-00,135'-00,145'-60,131'

-00,121'-00,126'-00,112'-00,107’-00,113'-80,113'-00,114-00,105'-00,007’-00.000'-00,007'-00.079’-00,004’-00,005'-00,069’

-00,000’-00,070'-00,073'-00,003'-00,064'-00,050'-80.056'-00.059’-00,056'-00,043'-80,044’-80,043'-00,041'-80,033'

—

246247240249260251262253254266266267260269

FLANGEBEND

FLANGEBENDTEE

mjiyj te—isll/HGE

X COORDINATE2.369,743’2.369.546’2,369,247’2,369.007'2,360,754'2,360.502’2.360,173’2,367,920’2.367.620’2,367.425'2,367,177’2,366,0552,306,5602,366,3062,365,5442,305,6202,365,5172,365,5152,365,6042,365,604'

Y COORDINATE-00,020'-00,013'-00,017'-00,014'-00,009'-80,006'-00,005'-00,004-00,006’-79,991'-79,900'-79,901’-79,900'

-79,974’-79,965*-79.064'-79,939’-79,919’-79,919'-79,914’

NOTES & CER CATION

NOTE'S:

1) LENGTH OF RISERS NOT INCLUDED IN TOTAL FOOTAGE

AND STATIONING 0E AS-BUILT PIPELINE.

2) PREPARED FOR GLOBAL DIVERS.

3) B.O.R. REPRESENTS BOTTOM OF RISER.

4) DETAIL INSET TAKEN FROM CONSTRUCTION DRAWINGS

CERTIFIED CORRECT AS TO HORIZONTAL POSITION OF AS-BUILT PIPELINE.

REG. PROFESSIONAL LAND SURVEYOR NO. 4401 STATE OF LOUISIANA

GEODETIC DATUM: NAD 1927

ELLIPSOID: CLARKE 1866

PROJECTION: LAMBERT

ZONE: LOUISIANA SOUTH

CENTRAL MERIDIAN: 91* 20’ W

X ORIGIN = 2,000,000 ft. AT CENTRAL MERIDIAN

Y ORIGIN = 0 ft. AT 28* 40’ N

GRID UNITS: FEET

2000’bzE

2000’

SCALE FEET

WALTER OIL & GAS CORPORATION

AS-BUILT 12"GAS/CONDENSATE PIPELINE REROUTE

GRAND ISLE AREA BLK 104-”A ” B.O.R. 0 SOUTH TIMBALIER AREA BLK 209

GULF OF MEXICON

IS5B20JOHN E. CHANCE& ASSOCIATES, INC.

CIVIL ENGINEERS k LAND SURVEYORS - LAFAYETTE, LOUISIANA

A MEMBER OF THE FUGRO GROUP OF COMPANIES

JOB NO.: 98-1587

FILE: H:\1MARINE\i'981587DATE: AUGUST 31, 1998

PRINT: AUGUST 31, 1998SHEET NO.

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