# State of Colorado Public Utilities Commission — Pipeline Safety Interpretation

**Citation:** PI-08-0010  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2009-02-20

PI-08-0010 response to State of Colorado Public Utilities Commission concerning 192.8.

## Document text

<<<PAGE 1>>>

February 20, 2009
Mr. Stephan Pott, PE
Chief, Gas Pipeline Safety
State of Colorado Public Utilities Commission
1560 Broadway, Suite 250
Denver, CO 80202
Ref. No.: PI-08-0010
Dear Mr. Pott:
The Pipeline and Hazardous Materials Safety Administration (PHMSA) reviewed your
December 11, 2008, letter transmitting an October 22, 2008, petition received by the Colorado
Public Utilities Commission (CO-PUC) from DCP Midstream for a finding that the endpoint of
the gathering designation for an intrastate gas pipeline should be extended beyond a gas
processing plant. Specifically, DCP Midstream requested a finding that the gathering
designation for a rural section of the ANGI intrastate pipeline be extended an additional 7.8
miles from the DCP Midstream Greeley Plant to the DCP Midstream Mewbourn Gas Plant, both
of which are located in Weld County, Colorado.
Per 49 CFR § 192.8 (a)(2) and Section 2.2 (a)(1)(A) of API RP 80, DCP Midstream included
documentation they feel demonstrates that extending the gathering designation an additional 7.8
miles from the Greely Plant to the Mewbourn Plant was justified based on sound engineering
principles.
Additional correspondence with DCP Midstream determined the following:
• The Greeley Plant separates the methane out and sells it there; the liquids are placed in
tanks at the facility and eventually transported to the intended destination via truck.
• The remainder of the gas, including 90% ethane, 5% methane, and 2% CO2 is then
transported to the Mewbourn Plant for additional processing.
• The normal operating pressure of the line is approximately 300 psig, down to
approximately 150 psig when delivered to the downstream plant
Based on the information provided in DCP Midstream’s petition, the additional correspondence,
and your recommendation, PHMSA finds that extending the endpoint of the gathering
designation for the ANGI gas pipeline an additional 7.8 miles to the Mewborne Plant is
warranted as long as the current operating parameters and operating pressures remain the same.
Accordingly, to the extent this condition is met, PHMSA grants the petition. If DCP Midstream
makes any significant changes to the operation of this line, such as increasing the pressure to
where the ethane might be in a liquid super critical phase, DCP Midstream will be required to
contact the CO-PUC and/or PHMSA’s Western Region to make a new determination.

<<<PAGE 2>>>

Sincerely,
Signed/JAG/2-20-09
John A. Gale
Director, Office of Regulations

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/PI080010.pdf>
- Source ID: `phmsa`
- SHA-256: `3b509cc20f5d06a96fb25ec07ca374509016a7cbe4543c688db114034cb637e1`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T07:47:27.965Z
- Document slug: `phmsa-interpretation-pi-08-0010`

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