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Denbury Riley Ridge to Natrona Project CO2

Project Information
Sector: Pipelines
Project Category: 
FAST-41 Covered Projects
Project Status: 
In Progress

The Riley Ridge to Natrona Project (Project) consists of three right-of-way grant applications:  (1) the Riley Ridge Carbon Dioxide (CO2) Pipeline Project, (2) the Bairoil to Natrona CO2 Pipeline Project, and (3) right-of-way for a 230-kilovolt (kV) transmission line to supply energy to the proposed Riley Ridge Sweetening Plant. It is a 243-mile project crossing through Fremont, Sublette, Sweetwater and Natrona counties in Wyoming on federal, state and private lands (191 miles on BLM lands). If approved, the Project would include the proposed Riley Ridge Sweetening Plant where H2S would be separated from the CO2 stream and injected into a deep geological formation via two proposed adjacent hydrogen sulfide (H2S) injection wells.

As proposed, the Riley Ridge to Sweeting Plant segment would include 31 miles of 16-inch pipeline transporting liquid H2S and CO2 from the existing Riley Ridge Treating Plant located 18 miles southwest of Big Piney, Wyoming, to the proposed Riley Ridge Sweetening Plant to be located 12 miles northeast of LaBarge, Wyoming. From the proposed Riley Ridge Sweetening Plant, a 24-inch pipeline would transport liquid CO2 129 miles through Sublette and Sweetwater counties to the Bairoil Interconnect located 50 miles northwest of Rawlins, Wyoming. The Bairoil to Natrona segment would include 83 miles of 24-inch pipeline transporting liquid CO2 from the Bairoil Interconnect through Fremont and Natrona counties to the Greencore Pipeline at the Natrona Hub 30 miles west of Casper, Wyoming.

Permitting Timeline

Endangered Species Act Consultation (DOI-FWS)
Fish and Wildlife Service (Cooperating under FAST-41), (Cooperating under NEPA)
In Progress
Request for ESA Consultation Received
Complete 11/15/2018
Consultation Package Deemed Complete – Formal
Complete 11/26/2018
Conclusion of ESA Consultation
Current Target Date: 01/18/2019
Environmental Impact Statement (EIS)
Bureau of Land Management
In Progress
Issuance of Notice of Intent to prepare an Environmental Impact Statement (EIS) 
Complete 06/09/2014
Complete 07/09/2014
Official Notice of Availability of a Draft EIS published in the Federal Register (FR) beginning both the public comment period and concurrent CAA Section 309 Review
Current Target Date: 03/30/2018
Official Notice of Availability of a Final EIS published in the FR beginning both the public review period and concurrent CAA Section 309 Review 
Current Target Date: 10/24/2018
Issuance of Record of Decision or combined Final EIS / Record of Decision 
Current Target Date: 11/22/2018
Right-of-Way Authorization (DOI-BLM)
Bureau of Land Management
In Progress
Initial application received
Complete 02/19/2013
Issuance of decision for permit/approval
Current Target Date: 01/22/2019
Section 106 Review
Bureau of Land Management
In Progress
Consultation initiated with SHPO/THPO
Complete 07/01/2014
Section 106 consultation concluded
Current Target Date: 11/15/2018
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