Customer Concentration and Revenue Information

Geographic Location

The Company provides services throughout the United States and previously in Canada. Revenues from services provided in Canada were not material during fiscal 2019, the 2018 transition period, fiscal 2017, or fiscal 2016.

Significant Customers

The Company’s customer base is highly concentrated, with its top five customers accounting for approximately 78.4%, 75.8%, 76.8%, and 70.1%, of its total contract revenues during fiscal 2019, the 2018 transition period, fiscal 2017, and fiscal 2016, respectively. Customers whose contract revenues exceeded 10% of total contract revenues during fiscal 2019, the 2018 transition period, fiscal 2017, or fiscal 2016, as well as total contract revenues from all other customers combined, were as follows:



	Fiscal Year Ended			Six Months Ended		Fiscal Year Ended
	January 26, 2019			January 27, 2018		July 29, 2017		July 30, 2016
	Amount		% of Total	Amount	% of Total	Amount	% of Total	Amount	% of Total
AT&T Inc.	664.2		21.2%	290.1	20.6%	806.7	26.3%	650.9	24.4%
Comcast Corporation	650.2		20.8%	304.4	21.6%	543.6	17.7%	363.1	13.6%
Verizon Communications Inc.⁽¹⁾	599.8		19.2%	168.7	12.0%	282.7	9.2%	298.2	11.2%
Century Link, Inc.⁽²⁾	425.6		13.6%	247.0	17.5%	556.8	18.2%	394.0	14.7%
Total other customers combined	787.9		25.2%	401.1	28.3%	877.1	28.6%	966.3	36.1%
Total contract revenues	$	3,127.7	100.0%	1,411.3	100%	3,066.9	100.0%	2,672.5	100%

⁽¹⁾For comparison purposes in the table above, amounts from Verizon Communications Inc. and XO Communications LLC’s fiber-optic network business have been combined for periods prior to their February 2017 merger.

⁽²⁾For comparison purposes in the table above, amounts from CenturyLink, Inc. and Level 3 Communications, Inc. have been combined for periods prior to their November 2017 merger.

See Note 6, Accounts Receivable, Contract Assets, and Contract Liabilities, for information on the Company’s customer credit concentration and collectability of trade accounts receivable and contract assets.

On February 25, 2019, Windstream, the Company’s fifth largest customer with contract revenues of $113.6 million during fiscal 2019, filed a voluntary petition under Chapter 11 of the United States Bankruptcy Code in the U.S. Bankruptcy Court for the Southern District of New York. The Company expects to continue to provide services to Windstream pursuant to existing contractual obligations but the amount of services performed in the future could be reduced or eliminated.

Customer Type

Total contract revenues by customer type during fiscal 2019, the 2018 transition period, fiscal 2017, and fiscal 2016 were as follows (dollars in millions):



	Fiscal Year Ended			Six Months Ended			Fiscal Year Ended
	January 26, 2019			January 27, 2018			July 29, 2017			July 30, 2016
	Amount		% of Total	Amount		% of Total	Amount		% of Total	Amount		% of Total
Telecommunications	$	2,855.8	91.3%	$	1,284.1	91.0%	$	2,819.9	91.9%	$	2,424.2	90.7%
Underground facility locating	$	182.7	5.8%	$	88.6	6.3%	$	167.9	5.5%	$	156.7	5.9%
Electrical and gas utilities and other	$	89.2	2.9%	$	38.6	2.7%	$	79.1	2.6%	$	91.6	3.4%
Total contract revenues	$	3,127.7	100%	$	1,411.3	100%	$	3,066.9	100%	$	2,672.5	100%

Remaining Performance Obligations

Master service agreements and other contractual agreements with customers contain customer-specified service requirements, such as discrete pricing for individual tasks. In most cases, the Company’s customers are not contractually committed to procure specific volumes of services under these agreements.

Services are generally performed pursuant to these agreements in accordance with individual work orders. An individual work order generally is completed within one year or in many cases, less than one week. As a result, the Company’s remaining performance obligations under the work orders not yet completed is not meaningful in relation to the Company’s overall revenue at any given point in time. The Company applies the practical expedient in Accounting Standards Codification Topic 606, Revenue from Contracts with Customers, and does not disclose information about remaining performance obligations that have original expected durations of one year or less.