{"methodology":{"caveats":["Access is density/diversity-based; the EIA pipeline geofeed does not publish per-segment throughput (capacity_mcf), so this is a relative infrastructure-presence index, not a deliverability/firm-capacity model.","Cost uses the latest available industrial or electric-power series per state."],"corrections":[{"action":"withdrawn","date":"2026-08-08","what":"An internal audit found two of the three terms measurably wrong. The whole ranking came down rather than part of it."},{"action":"restored","date":"2026-08-30","fixes":["gas_access: the 0.20 interstate_share term compared a lowercase literal against capitalised EIA TYPEPIPE values and scored ~0 for all published states. Case-folded at both comparison sites; interstate segments counted went 122 -> 17,571.","gas_cost: the price was picked by a non-deterministic tie-break across the EIA industrial (PIN) and electric-power (PEU) series, which carry different margins. PEU is now preferred, the ordering is total, and gas_price_series names the basis per row.","gas_cost: nine states including Texas were scored on a hardcoded 50.0. EIA publishes all nine; the loader was dropping them on a case-sensitive area-name lookup. Backfilled 2026-08-30 (eia_gas_prices 41 -> 50 states). The constant is deleted: a state that cannot be priced is now UNSCORED, not neutral-scored.","gas_cost: the 2.5/12.0 linear scale was fitted to the industrial series and saturated 15 of 50 states once PEU became the basis. Now log-linear, pinned 1.0/20.0 $/MMBtu, 0 states saturated.","unit: the price was published as dollars per thousand cubic feet in seven places. It is $/MMBtu \u2014 the loader divides the EIA series by 1.037 before storing."],"what":"All three defects repaired and verified against production. Scores published before 2026-08-08 are NOT comparable to scores published from this date: the interstate term, the price basis and the cost scale all changed."}],"data_sources":["EIA natural-gas interstate/intrastate pipeline geodata (gas_pipelines)","EIA natural-gas prices by sector & state (eia_gas_prices)"],"index":"Data Center Gas Index (DCGI)","license":"CC BY 4.0 \u2014 cite 'DC Hub Data Center Gas Index (DCGI), dchub.cloud'","purpose":"Score US states on natural-gas suitability for siting data-center power load, for the behind-the-meter / gas-to-power era.","scores":{"dcgi":"0.60*gas_access + 0.40*gas_cost","gas_access":"0.45*pipeline_density + 0.35*operator_diversity + 0.20*interstate_share","gas_cost":"log-inverse of the latest delivered gas price ($/MMBtu), pinned floor $1.00 / ceiling $20.00. The electric-power (PEU) series is preferred over industrial (PIN) \u2014 PIN carries the LDC distribution margin and PEU does not \u2014 and gas_price_series names which one answered each state. Log-scaled because the distribution is log-normal: half of US states sit inside a 1.6x band and the tail runs to 49x."},"still_withdrawn":{"gas_to_grid_usd_per_mwh":"Gas-fired $/MWh figures remain withdrawn (DCHUB_GAS_TO_GRID_ENABLED). Defect 4 of the same audit \u2014 five surfaces published a $/MWh for the same market on the same day, disagreeing by up to 5.5x, with no sanity gate. That is not fixed by the DCGI repair and is not re-enabled with it."},"verdicts":{"ADEQUATE":"dcgi >= 42","GAS-ADVANTAGED":"dcgi >= 62 and gas_access >= 50","GAS-CONSTRAINED":"dcgi < 42"}},"ok":true}