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What this is

RRC publishes this separately as ngf115.txt.gz, and it is not what the name suggests: it is not restricted to tight sands. It carries all 90,732 certification records, of which 88,964 are tight sands (c107x_code T) and 1,768 are not — 923 category A, 837 F and 8 D.

It is also the same data as High Cost Gas, which RRC publishes as ngf019.txt.gz. Verified against both on 2026-08-07: identical row counts, identical code distribution, and 89,206 distinct lease-well keys in each with none in one and not the other. So this is decoded and queryable here too.

What you can do with it

Filter c107x_code to T for the tight-sands certifications the filename promises, or leave it off for the whole record. Either way you get a spreadsheet rather than a brace-delimited file.

Gotchas

The name says tight sands and the file is not restricted to them: 1,768 of its 90,732 rows carry another category. Filter c107x_code = T if that is what you want.

This is the same data as the High Cost Gas dataset, byte for byte in content — RRC simply publishes it under two filenames. Either dataset gives you the same rows.

Record layout

13 columns.

`high_cost_gas` 13 columns

Record layout for `high_cost_gas` — 13 columns
#	Column	Type	RRC name	Meaning	Lookup
1	`oil_gas_code` key	text	`OIL_GAS_CODE`	'OIL' or 'GAS' — note that this file spells the schedule out in full. e.g. GAS	—
2	`district` key join	text	`DISTRICT`	RRC district the record belongs to, written the way RRC prints it (01-06, 6E, 7B, 7C, 08, 8A, 09, 10). e.g. 14	RRC district (internal number)
3	`lease_number` key join	text	`LEASE_NUMBER`	RRC lease number. Unique only within a district and a schedule. e.g. 027587	—
4	`well_number` key	text	`WELL_NUMBER`	Well number within the lease.	—
5	`operator_number` join	text	`OPERATOR_NUMBER`	The operator's six-digit RRC P-5 organization number.	—
6	`docket_number` join	text	`DOCKET_NUMBER`	Docket number of the high-cost gas determination.	—
7	`c107x_code`	text	`C107X_CODE`	Section 107 category code the certification was granted under.	—
8	`post_approval_date`	text	`POST_APPROVAL_DATE`	Date the approval was posted.	—
9	`approval_date`	text	`APPROVAL_DATE`	Date the certification was approved.	—
10	`first_prod_date`	text	`FIRST_PROD_DATE`	First production date claimed for the qualifying well.	—
11	`spud_date`	text	`SPUD_DATE`	Spud date claimed for the qualifying well.	—
12	`received_date`	text	`RECEIVED_DATE`	Date RRC received the application.	—
13	`ingested_at`	timestamptz	—	When the upstream pipeline last wrote this row. Not an RRC field — it is EZRRC's provenance stamp, and it is what the freshness badge is measured against.	—

Code lookups used here

Every coded column in this dataset resolves to a real lookup table, so a well code of G can be read as what it actually means.

RRC district (internal number) 14 values

Read by district

RRC's internal sequential district numbering, 01 to 14 plus 20 for statewide. The production data, the UIC database and the high-cost gas certifications all use this. Internal 07 is District 6E, 08 is 7B, 09 is 7C, 10 is District 08, 11 is 8A, 13 is 09 and 14 is District 10. There is no internal 12.

RRC district (internal number) — 14 codes and their meanings
Code	Means
`01`	District 01 — San Antonio (internal 01) Internal district number 01, which RRC prints as District 01 and administers from San Antonio.
`02`	District 02 — San Antonio (internal 02) Internal district number 02, which RRC prints as District 02 and administers from San Antonio.
`03`	District 03 — Houston (internal 03) Internal district number 03, which RRC prints as District 03 and administers from Houston.
`04`	District 04 — Corpus Christi (internal 04) Internal district number 04, which RRC prints as District 04 and administers from Corpus Christi.
`05`	District 05 — Kilgore (internal 05) Internal district number 05, which RRC prints as District 05 and administers from Kilgore.
`06`	District 06 — Kilgore (internal 06) Internal district number 06, which RRC prints as District 06 and administers from Kilgore.
`07`	District 6E — Kilgore (internal 07) Internal district number 07, which RRC prints as District 6E and administers from Kilgore.
`08`	District 7B — Abilene (internal 08) Internal district number 08, which RRC prints as District 7B and administers from Abilene.
`09`	District 7C — San Angelo (internal 09) Internal district number 09, which RRC prints as District 7C and administers from San Angelo.
`10`	District 08 — Midland (internal 10) Internal district number 10, which RRC prints as District 08 and administers from Midland.
`11`	District 8A — Midland (internal 11) Internal district number 11, which RRC prints as District 8A and administers from Midland.
`13`	District 09 — Wichita Falls (internal 13) Internal district number 13, which RRC prints as District 09 and administers from Wichita Falls.
`14`	District 10 — Pampa (internal 14) Internal district number 14, which RRC prints as District 10 and administers from Pampa.
`20`	District 20 — State Wide (internal 20) Internal district number 20, which RRC prints as District 20 and administers from State Wide.

Source: Generated from texas.pdq_gp_district.district_no

Where this comes from

Published by

Texas Railroad Commission — the original page

Original format

Fixed-width Columns are byte ranges with no separators, described only in a scanned record layout.

RRC publishes

Updated once a month (Monthly. Available by the 27th.)

EZRRC re-ingests

Weekly The RRC republishes more often than we pull. For the very latest file, go to the RRC directly.

RRC download link

GoAnywhere MFT

Record layout manual

Gas Leases Within High Cost Gas (Tight Sands) — File Definition

Our table

texas.high_cost_gas

EZRRC is an independent mirror of public-domain data published by the Texas Railroad Commission. It is not affiliated with or endorsed by the RRC. For any legal or regulatory purpose, verify against the official RRC release.