Certain Balance Sheet Information

Property, Plant and Equipment

Property, plant and equipment of the following at December 31, 2017 and 2016 (in millions):



	CEQP				CMLP
	December 31,				December 31,
	2017		2016		2017		2016
Gathering systems and pipelines and related assets	$	678.0	$	639.4	$	820.9	$	782.3
Facilities and equipment	1,141.4		1,328.3		1,326.5		1,513.4
Buildings, land, rights-of-way, storage rights and easements	319.1		315.4		322.8		319.1
Vehicles	37.3		45.7		35.5		44.0
Construction in process	87.5		85.9		87.5		85.9
Salt deposits	—		120.5		—		120.5
Office furniture and fixtures	21.9		20.2		22.1		20.3
	2,285.2		2,555.4		2,615.3		2,885.5
Less: accumulated depreciation and depletion	464.4		457.8		607.8		587.1
Total property, plant and equipment, net	$	1,820.8	$	2,097.6	$	2,007.5	$	2,298.4

Depreciation. CEQP’s depreciation expense totaled $135.9 million, $154.8 million and $195.1 million for the years ended December 31, 2017, 2016 and 2015. CMLP’s depreciation expense totaled $150.0 million, $168.9 million and $186.7 million for the years ended December 31, 2017, 2016 and 2015. Depletion expense at both CEQP and CMLP totaled $0.7 million for each of the years ended December 31, 2017, 2016 and 2015.

Capitalized Interest. During the years ended December 31, 2017, 2016 and 2015, CEQP and CMLP capitalized interest of $2.9 million, $0.7 million and $2.5 million related to certain expansion projects.

Gain (Loss) on Long-Lived Assets. During the year ended December 31, 2017, we recorded a gain of approximately $33.6 million on the sale of our 100% interest in US Salt. In addition, we recorded a loss of approximately $14.4 million during the year ended December 31, 2017, related to the retirement and/or disposition of certain of our Marcellus and Arrow gathering and processing assets.

Intangible Assets

Intangible assets consisted of the following at December 31, 2017 and 2016 (in millions):



	CEQP				CMLP
	December 31,				December 31,
	2017		2016		2017		2016
Customer accounts	$	438.9	$	541.9	$	438.9	$	541.9
Covenants not to compete	—		1.0		—		1.0
Gas gathering, compression and processing contracts	325.2		325.2		325.2		325.2
Trademarks	24.7		30.5		9.2		15.0
	788.8		898.6		773.3		883.1
Less: accumulated amortization	191.6		241.2		177.6		230.2
Total intangible assets, net	$	597.2	$	657.4	$	595.7	$	652.9

The following table summarizes total accumulated amortization of our intangible assets at December 31, 2017 and 2016 (in millions):



	CEQP				CMLP
	December 31,				December 31,
	2017		2016		2017		2016
Customer accounts	$	89.8	$	162.4	$	89.8	$	162.4
Gas gathering, compression and processing contracts	82.0		63.2		82.0		63.2
Trademarks	19.8		15.6		5.8		4.6
Total accumulated amortization	$	191.6	$	241.2	$	177.6	$	230.2

Crestwood Equity’s amortization expense related to its intangible assets for the years ended December 31, 2017, 2016 and 2015, was approximately $53.7 million, $72.5 million and $102.8 million. Crestwood Midstream’s amortization expense related to its intangible assets for the years ended December 31, 2017, 2016 and 2015 was approximately $50.6 million, $69.3 million and $89.6 million.

Estimated amortization of our intangible assets for the next five years is as follows (in millions):



	CEQP		CMLP
Year Ending December 31,
2018	$	43.4	$	42.0
2019	41.7		41.7
2020	41.7		41.7
2021	41.7		41.7
2022	41.7		41.7

Accrued Expenses and Other Liabilities

Accrued expenses and other liabilities consisted of the following at December 31, 2017 and 2016 (in millions):



	CEQP				CMLP
	December 31,				December 31,
	2017		2016		2017		2016
Accrued expenses	$	56.6	$	46.5	$	55.5	$	45.1
Accrued property taxes	4.8		4.2		4.8		4.2
Accrued natural gas purchases	—		4.9		—		4.9
Income tax payable	0.3		1.6		0.3		0.4
Interest payable	20.3		22.8		20.3		22.8
Accrued additions to property, plant and equipment	22.3		1.7		22.2		1.7
Capital leases	1.0		1.3		1.0		1.3
Deferred revenue	0.6		7.5		0.6		7.5
Total accrued expenses and other liabilities	$	105.9	$	90.5	$	104.7	$	87.9