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HILCORP ENERGY gas channel

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PROPOSED DREDGING FOR ACCESS, WELL INSTALLATIONS AND FLOWLINES, TAMBOUR BAY, TERREBONNE PARISH

NAME OF APPLICANT: HILCORP ENERGY, c/o Providence Engineering and Environmental, Attn: Regina Staten, 1201 Main Street, Baton Rouge, Louisiana 70802. LOCATION OF WORK: Tambour Bay, approximately 4.2 miles south of Cocodrie, Louisiana, (29.186633, -90.654091), in Terrebonne Parish, as shown on the enclosed drawings, within Hydrologic Unit Code 08090302, West Central Louisiana Coastal, Louisiana.

CHARACTER OF WORK: The applicant has requested Department of the Army authorization to dredge an access channel in order to install and maintain a proposed drill barge, platform and appurtenant structures to drill the U2 #27 Side Track and Hood Prospects. Approximately 5,072 cubic yards of native material will be displaced via propwashing and 48,715 cubic yards of open water will be hydraulically dredged to access the well sites. A dredge discharge line will be used to transport the hydraulically dredged material from open water to the spoil placement areas at an elevation conducive to the establishment of marsh habitat. If the wells are successful, approximately 5,205 linear feet of one (1) two-inch diameter gas line and approximately 5,205 linear feet of one (1) four-inch diameter flowline will be installed from the wells to an existing facility.

JOINT PUBLIC NOTICE November 12, 2018 United States Army Corps of Engineers New Orleans District Attn: Regulatory Branch 7400 Leake Avenue New Orleans, Louisiana 70118

State of Louisiana Department of Environmental Quality Attn: Office of Environmental Services Post Office Box 4313 Baton Rouge, Louisiana 70821-4313

Project Manager: Dirreen Arnold (504) 862-2301 / fax: (504) 862-2574 dirreen.s.arnold@usace.army.mil Permit Application Number: MVN-2018-01387-CA

Project Manager: Elizabeth Hill (225) 219-3225 / fax: (225) 219-3156 WQC Application Number: WQC-181107-02

Interested parties are hereby notified that a permit application has been received by the New Orleans District of the US Army Corps of Engineers pursuant to: [X] Section 10 of the Rivers and Harbors Act of March 3, 1899 (30 Stat. 1151; 33 USC 403); and/or [X] Section 404 of the Clean Water Act (86 Stat. 816; 33 USC 1344). Application has also been made to the Louisiana Department of Environmental Quality, Office of Environmental Services, for a Water Quality Certification (WQC) in accordance with statutory authority contained in LRS 30:2074 A(3) and provisions of Section 401 of the Clean Water Act. PROPOSED DREDGING FOR ACCESS, WELL INSTALLATIONS AND FLOWLINES, TAMBOUR BAY, TERREBONNE PARISH NAME OF APPLICANT: HILCORP ENERGY, c/o Providence Engineering and Environmental, Attn: Regina Staten, 1201 Main Street, Baton Rouge, Louisiana 70802 LOCATION OF WORK: Tambour Bay, approximately 4.2 miles south of Cocodrie, Louisiana, (29.186633, -90.654091), in Terrebonne Parish, as shown on the enclosed drawings, within Hydrologic Unit Code 08090302, West Central Louisiana Coastal, Louisiana. CHARACTER OF WORK: The applicant has requested Department of the Army authorization to dredge an access channel in order to install and maintain a proposed drill barge, platform and appurtenant structures to drill the U2 #27 Side Track and Hood Prospects. Approximately 5,072 cubic yards of native material will be displaced via propwashing and 48,715 cubic yards of open water will be hydraulically dredged to access the well sites. A dredge discharge line will be used to transport the hydraulically dredged material from open water to the spoil placement areas at an elevation conducive to the establishment of marsh habitat. If the wells are successful, approximately 5,205 linear feet of one (1) two-inch diameter gas line and approximately 5,205 linear feet of one (1) four-inch diameter flowline will be installed from the wells to an existing facility.

-2-

The applicant has stated that the project has been designed to avoid and minimize direct and secondary adverse impacts to the maximum extent practicable. The proposed project will not directly impact any jurisdictional wetlands and compensatory mitigation is not anticipated. The comment period for the Department of the Army Permit and the Louisiana Department of Environmental Quality WQC will close 20 days from the date of this joint public notice. Written comments, including suggestions for modifications or objections to the proposed work, stating reasons thereof, are being solicited from anyone having interest in this permit and/or this WQC request and must be submitted so as to be received before or by the last day of the comment period. Letters concerning the Corps of Engineers permit application must reference the applicant's name and the Permit Application Number, and be forwarded to the Corps of Engineers at the address above, ATTENTION: REGULATORY BRANCH. Similar letters concerning the Water Quality Certification must reference the applicant's name and the WQC application number and be mailed to the Louisiana Department of Environmental Quality at the address above. Individuals or parties may request an extension of time in which to comment on the proposed work by writing, faxing, or e-mailing the Corps of Engineers Project Manager listed above. Any request must be specific and substantively supportive of the requested extension, and received by this office prior to the end of the initial comment period. The Section Chief will review the request and the requestor will be promptly notified of the decision to grant or deny the request. If granted, the time extension will be continuous to the initial comment period and, inclusive of the initial comment period, will not exceed a total of 30 calendar days. The application for this proposed project is on file with the Louisiana Department of Environmental Quality and may be examined during weekdays between 8:00 a.m. and 4:30 p.m. Copies may be obtained upon payment of costs of reproduction. Corps of Engineers Permit Criteria The decision whether to issue a permit will be based on an evaluation of the probable impacts, including cumulative impacts of the proposed activity on the public interest. That decision will reflect the national concern for both protection and utilization of important resources. The benefit which reasonably may be expected to accrue from the proposal must be balanced against its reasonably foreseeable detriments. All factors which may be relevant to the proposal will be considered including the cumulative effects thereof; among those are conservation, economics, aesthetics, general environmental concerns, wetlands, historic properties, fish and wildlife values, flood hazards, floodplain values, land use, navigation, shoreline erosion and accretion, recreation, water supply and conservation, water quality, energy needs, safety, food and fiber production, mineral needs, considerations of property ownership and, in general, the needs and welfare of the people.

-3-

The U.S. Army Corps of Engineers is soliciting comments from the public, federal, state, and local agencies and officials, Indian Tribes, and other interested parties in order to consider and evaluate the impacts of this proposed activity. Any comments received will be considered by the U.S. Army Corps of Engineers to determine whether to make, modify, condition, or deny a permit for this proposal. To make this decision, comments are used to assess impacts on endangered species, historic properties, water quality, general environmental effects, and other public interest factors listed above. Comments are used in the preparation of an Environmental Assessment and/or an Environmental Impact Statement pursuant to the National Environmental Policy Act. Comments are also used to determine the need for a public hearing and to determine the overall public interest of the proposed activity. The New Orleans District is unaware of properties listed on the National Register of Historic Places near the proposed work. The possibility exists that the proposed work may damage or destroy presently unknown archeological, scientific, pre-historical, historical sites, or data. Issuance of this public notice solicits input from the State Archeologist and State Historic Preservation Officer regarding potential impacts to cultural resources. Our initial finding is that the proposed work would not affect any species, nor affect any habitat designated as critical to the survival and recovery of such species, listed as endangered by the U.S. Department of Interior. The New Orleans District has determined that the proposed project is located within waters known to be occupied by the endangered West Indian Manatee (Trichechus manatus) and determined with the inclusion of the Standard Manatee Conditions for In-Water Activities the proposed activity is not likely to adversely affect the species based on the Standard Local Operating Procedure for Endangered Species in Louisiana (SLOPES), dated October 22, 2014, between the U.S. Army Corps of Engineers, New Orleans and U.S. Fish and Wildlife Service, Ecological Services Office, the Corps has determined that with the inclusion of the Standard Manatee Conditions for In-Water Activities, the proposed work is not likely to adversely affect the West Indian Manatee. This notice initiates the Essential Fish Habitat (EFH) consultation requirements of the Magnuson-Stevens Fishery Conservation and Management Act. The applicant's proposal may result in the destruction or alteration of 0.0 acres of EFH utilized by various life stages of red drum and penaeid shrimp. Our initial determination is that the proposed action would not have a substantial adverse impact on EFH or federally managed fisheries in the Gulf of Mexico. Our final determination relative to project impacts and the need for mitigation measures is subject to review by and coordination with the National Marine Fisheries Service. If the proposed work involves deposits of dredged or fill material into navigable waters, the evaluation of the probable impacts will include the application of guidelines established by the Administrator of the Environmental Protection Agency. Also, a certification that the proposed activity will not violate applicable water quality standards will be required from the Department of Environmental Quality, before a permit is issued.

-4-

Any person may request, in writing, within the comment period specified in this notice, that a public hearing be held to consider this application. Requests for public hearings shall state, with particularity, the reasons for holding a public hearing. You are requested to communicate the information contained in this notice to any other parties whom you deem likely to have interest in the matter. The applicant has certified that the proposed activity described in the application complies with and will be conducted in a manner that is consistent with the Louisiana Coastal Resources Program. The Department of the Army permit will not be issued unless the applicant received approval or a waiver of the Coastal Use Permit by the Department of Natural Resources.

JOHN M. HERMAN Chief, Central Evaluation Section Regulatory Branch

Enclosure

_ ^

Ho o d Pr o spec t La t :29°1 1' 1 1. 88"N ( 83) Lo ng:90°39' 14. 73"W ( 83) X=2, 216, 787. 002( 27) Y =189, 647. 987( 27)

_ ^ _ ^ _ ^

U 2#27S ide T r ack La t :29°1 1' 09. 24"N ( 83) Lo ng:90°39' 09. 74"W ( 83) X=2, 217, 230. 709( 27) Y =189, 383. 348( 27)

2

1

Legend

_ ^ _ ^

0

2 M iles

Pr o spec tLo c a t io ns Exist ing Fa c ilit y Pr o po sed 4"Flo wlines ( ~5, 205T o t a lLinea rFeet ) Pr o po sed 2"Ga slines ( ~5, 205T o t a lLinea rFeet )

Vicinity Map Joint Permit Application T er r eb o nne Pa r ish,Lo uisia na

Hilcorp Energy Company

U 2#27S ide T r a c k a nd Ho o d Pr o spec t Drawn By

Checked By

Approved By

Reference Ba se m a pc o m pr ised o fES RIS t r eet M a pU S Ada t a.

T DJ

9/ 17/ 18

RS

9/ 17/ 18

OPB

Project Number

1140040

Drawing Number

1140040A001

9/ 17/ 18

1

Figur e

Pr o videnc e Engineer ing a nd Env ir o nm ent a lGr o upLLC

Exist ing Fa c ilit y La t :29°10' 45. 18"N ( 83) Lo ng:90°39' 07. 61"W ( 83)

Hood P rospe c t L at :29°1 1' 1 1. 88"N( 83) L ong:90°39' 14. 73"W ( 83) X =2, 216, 787. 002( 27) Y=189, 647. 987( 27)

_ ^

_ ^

U 2#27Sid e Trac k L at :29°1 1' 09. 24"N ( 83) L ong:90°39' 09. 74"W ( 83) X =2, 217, 230. 709( 27) Y=189, 383. 348( 27)

_ ^

2, 000

1, 000

Legend

_ ^ _ ^

0

2, 000 Fe e t

P rospe c tL oc at ions Ex is t ing Fac ilit y P ropose d 4"Flowline s( ~5, 205Tot alL ine ar Fe e t ) P ropose d 2"Gasline s( ~5, 205Tot alL ine ar Fe e t )

Reference Base m ap c om prise d ofU nit e d St at e sGe ologic alSurv e y( U SGS) 7. 5m inut e t opographic m ap," Coc od rie ,L A" .

Site Location Map Joint Permit Application Te rre b onne P arish,L ouisiana

Hilcorp Energy Company

U 2#27Sid e Trac k and Hood P ros pe c t Drawn By

Checked By

Approved By

TDJ

9/ 17/ 18

RS

9/ 17/ 18

O PB

Project Number

1140040

Drawing Number

1140040A002

9/ 17/ 18

2

Figure

Provid e nc e Engine e ring and Env ironm e nt alGroup L L C

Ex is t ing Fac ilit y L at :29°10' 45. 18"N( 83) L ong:90°39' 07. 61"W ( 83)

Hood P rospe c t L at :29°1 1' 1 1. 88"N( 83) L ong:90°39' 14. 73"W ( 83) X =2, 216, 787. 002( 27) Y=189, 647. 987( 27)

U 2#27Sid e Trac k L at :29°1 1' 09. 24"N ( 83) L ong:90°39' 09. 74"W ( 83) X =2, 217, 230. 709( 27) Y=189, 383. 348( 27)

_ ^ _ ^

_ ^

1, 000

500

Legend

_ ^ _ ^

0

1, 000 Fe e t

P rospe c tL oc at ions Ex is t ing Fac ilit y P ropose d 4"Flowline s( ~5, 205Tot alL ine ar Fe e t ) P ropose d 2" Gasline s( ~5, 205T ot alL ine ar Fe e t )

Reference Base m ap c om prise d ofU nit e d St at e sGe ologic alSurv e y( U SGS) 7. 5m inut e t opographic m ap," Coc od rie ,L A" .

Aerial Photograph Joint Permit Application Te rre b onne P arish,L ouisiana

Hilcorp Energy Company

U 2#27Sid e Trac k and Hood P ros pe c t Drawn By

Checked By

Approved By

TDJ

9/ 17/ 18

RS

9/ 17/ 18

O PB

Project Number

1140040

Drawing Number

1140040A003

9/ 17/ 18

3

Figure

Provid e nc e Engine e ring and Env ironm e nt alGroup L L C

Ex is t ing Fac ilit y L at :29°10' 45. 18"N( 83) L ong:90°39' 07. 61"W ( 83)

Name

Access from Bayou Petit Caillou (water depths >10')

Proposed Propwash 1 Proposed Propwash 2 Proposed Propwash 3

Proposed Propwash 1 Length: 334' Area: 0.523 Acres Volume: 434 cu.yds.

Proposed Propwash 4 Proposed Propwash 5 Proposed Hydraulic Dredge Crossing Pipelines to be lowered - 1 Crossing Pipelines to be lowered - 2 Crossing Pipelines to be lowered - 3 Crossing Pipelines to be lowered - 4

Proposed Propwash 2 Length: 450' Area: 0.756 Acres Volume: 583 cu.yds.

POB POE POB POE POB POE POB POE POB POE POB POE POB POE POB POE POB POE POB POE

Latitude (83) 29° 13' 35.29" N 29° 13' 32.42" N 29° 12' 51.63" N 29° 12' 47.44" N 29° 12' 24.99" N 29° 12' 20.74" N 29° 12' 05.36" N 29° 11' 54.73" N 29° 11' 46.35" N 29° 11' 42.44" N 29° 11' 25.13" N 29° 11' 10.02" N 29° 11' 20.63" N 29° 11' 21.00" N 29° 11' 20.58" N 29° 11' 20.93" N 29° 11' 19.13" N 29° 11' 19.60" N 29° 11' 18.13" N 29° 11' 18.53" N

Longitude (83) 90° 40' 21.79" W 90° 40' 23.39" W 90° 40' 30.01" W 90° 40' 28.59" W 90° 40' 21.40" W 90° 40' 20.03" W 90° 40' 15.05" W 90° 40' 13.01" W 90° 40' 12.77" W 90° 40' 12.66" W 90° 40' 02.10" W 90° 39' 08.24" W 90° 39' 57.54" W 90° 39' 56.25" W 90° 39' 57.42" W 90° 39' 56.09" W 90° 39' 54.21" W 90° 39' 53.09" W 90° 39' 51.96" W 90° 39' 50.71" W

Proposed Propwash 3 Length: 446' Area: 0.717 Acres Volume: 555 cu.yds.

Proposed Propwash 4 Length: 1,108' Area: 1.762 Acres Volume: 2,875 cu.yds.

See Figure1a Crossing Pipelines - 1 Length: 120' Crossing Pipelines - 2 Length: 123'

Proposed Propwash 5 Length: 395' Area: 0.645 Acres Volume: 625 cu.yds.

Hood Prospect Lat = 29°11'11.88" (83) Lon= -90°39'14.73" (83) X=2,216,787.002 (27) Y=189,647.987 (27)

U2 #27 Side Track Lat = 29°11'09.24" (83) Lon= -90°39'09.74" (83) X=2,217,230.709 (27) Y=189,383.348 (27)

A

B

Crossing Pipelines - 3 Length: 110'

A'

C

Crossing Pipelines - 4 Length: 118' Proposed Hydraulic Dredge Length: 6,556' Area: 12.487 Acres Volume: 48,715 cu.yds.

3,000'

1,500'

0'

B'

Existing Facility Lat: 29°10'45.18" N Lon: -90°39'07.61" W

C'

3,000'

Scale: 1'' = 3,000'

Legend

Access Site Plan

Proposed Propwash Area (High Tide Total = 5,072 cu.yds.) Proposed Hydraulic Dredge (High Tide Total = 48,715 cu.yds.)

Joint Permit Application Terrebonne Parish, Louisiana

Proposed Well Location

Notes 1. 2. 3. 4.

Quantities calculated using survey conducted on 8/14/2018. Mean high water +1.0' NAVD88. Water line at time of survey was +0.5' NAVD88. Calculations based on 70' wide canal, 7.5' Draft, and 0.5' Clearance.

Reference

Hilcorp Energy Company U2 #27 Side Track and Hood Prospect Drawn By

JS

10/04/18

Checked By

TDJ

10/04/18

Approved By

RS

10/04/18

Project Number

4a

1140-040-000 Drawing Number

Base map comprised of Bing Maps aerial imagery (c) 2018.

1140-040-A001

Figure

Providence Engineering and Environmental Group LLC

Proposed 4" Flowlines (~5,205 Total Linear Feet) Proposed 2" Gaslines (~5,205 Total Linear Feet)

Proposed Spoil Pile Area: 7.539 Acres Volume: 48,715 cu.yds.

Dredge Discharge Line

Proposed 15' x 57' Right-of-Way

Dredge Discharge Line

200'

100'

0'

200'

Access Site Plan

Legend Proposed Spoil Pile (~48,715 cu.yds.)

Notes 1. 2. 3. 4.

Quantities calculated using survey conducted on 8/14/2018. Mean high water +1.0' NAVD88. Water line at time of survey was +0.5' NAVD88. Calculations based on 70' wide canal, 7.5' Draft, and 0.5' Clearance.

Reference

Joint Permit Application Terrebonne Parish, Louisiana

Hilcorp Energy Company U2 #27 Side Track and Hood Prospect Drawn By

JJS

10/23/18

Checked By

TDJ

10/04/18

Approved By

RS

10/04/18

Project Number

1140-040-000 Drawing Number

Base map comprised of Bing Maps aerial imagery (c) 2018.

1140-040-A001

4b Figure

Providence Engineering and Environmental Group LLC

Scale: 1'' = 200'

20

20

Water Line (+1.0')

0

MHW +1.0' MLW 0.0'

0

8.0'

1.5'

Elevation

Elevation

Proposed Hydraulic Dredge (70')

Section A-A' Horizontal Scale: 1" = 20' Vertical Scale: 1" = 20'

-20

-20

20

20

Water Line (+1.0')

0

MHW +1.0' MLW 0.0'

0

8.0'

Elevation

Elevation

Proposed Hydraulic Dredge (160')

Section B-B'

2.9'

Horizontal Scale: 1" = 50' Vertical Scale: 1" = 20'

-20

-20

20

20

Water Line (+1.0')

0

8.0'

3.6' -20

Section C-C' Horizontal Scale: 1" = 50' Vertical Scale: 1" = 20'

-20

Note

Access Details

Access will be during high tide.

Joint Permit Application Terrebonne Parish, Louisiana

Hilcorp Energy Company U2 #27 Side Track and Hood Prospect

Reference

Drawn By

JS

10/04/18

Checked By

TDJ

10/04/18

Approved By

RS

10/04/18

Project Number

5a

1140-040-000 Drawing Number

Details comprised from client provided figure.

1140-040-A002

Figure

Providence Engineering and Environmental Group LLC

0

MHW +1.0' MLW 0.0'

Elevation

Elevation

Proposed Hydraulic Dredge (160')

Terrebonne

Terrebonne

1' 2'

U2

Rough impact

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