Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/56139
EIA plant 56139
Centerville · St Mary · LA
Neptune Gas Processing Plant
Operated by Enterprise Products Optg LP
Published location
Where is Neptune Gas Processing Plant?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
29.733600, -91.443100
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Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the LA plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
1909.74
21,026.32
31,088.11
41,039.76
51,095.13
61,001.51
7989.64
81,024.94
9891.98
101,017.83
11947.52
121,077.53
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 909.74 |
| 2 | 1,026.32 |
| 3 | 1,088.11 |
| 4 | 1,039.76 |
| 5 | 1,095.13 |
| 6 | 1,001.51 |
| 7 | 989.64 |
| 8 | 1,024.94 |
| 9 | 891.98 |
| 10 | 1,017.83 |
| 11 | 947.52 |
| 12 | 1,077.53 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 910 MWh |
| 2 | 1,026 MWh |
| 3 | 1,088 MWh |
| 4 | 1,040 MWh |
| 5 | 1,095 MWh |
| 6 | 1,002 MWh |
| 7 | 990 MWh |
| 8 | 1,025 MWh |
| 9 | 892 MWh |
| 10 | 1,018 MWh |
| 11 | 948 MWh |
| 12 | 1,078 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| NPCG | All Other | OTH | 4.5 | OP |
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Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
56139
Sector
Industrial CHP
Water source
Unavailable
Data edition
2024-final
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Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right Neptune Gas Processing Plant power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at Neptune Gas Processing Plant
Variation in the published months
Across 12 numeric monthly generation entries, 5 has the highest recorded value (1,095 MWh) and 9 the lowest (892 MWh). Their difference is 203 MWh. Missing months have not been treated as zero.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| NPCG | All Other | 4.5 | 3.1 | 3.5 | 1.6 |
EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.
Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.