Gas Reserves

3 Months Ended

Mar. 31, 2021

Gas Reserves [Abstract]

Gas Reserves

The following table outlines NW Natural's net gas reserves investment:

	March 31,				December 31,
In thousands	2021		2020		2020
Gas reserves, current	$	10,659	$	14,351	$	11,409
Gas reserves, non-current	176,648		172,956		175,898
Less: Accumulated amortization	145,048		127,722		141,414
Total gas reserves(1)	42,259		59,585		45,893
Less: Deferred taxes on gas reserves	9,831		14,522		10,572
Net investment in gas reserves	$	32,428	$	45,063	$	35,321

(1)     The net investment in additional wells included in total gas reserves was $2.8 million, $3.6 million and $3.0 million at March 31, 2021 and 2020 and December 31, 2020, respectively.