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Customer Concentration and Revenue Information | 3 Months Ended
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Apr. 26, 2025
Risks and Uncertainties [Abstract] |
Customer Concentration and Revenue Information | Customer Concentration and Revenue Information Geographic Location We provide services throughout the United States. Significant Customers Our customer base is highly concentrated. Customers whose contract revenues exceeded 10% of total contract revenues during the three months ended April 26, 2025 or April 27, 2024, as well as total contract revenues from all other customers combined, were as follows (dollars in millions):
| For the Three Months Ended |  |
| April 26, 2025 |  | April 27, 2024 |  |  |  |
| Amount |  | % of Total |  | Amount |  | % of Total |  |  |  |  |  |  |  |
AT&T Inc. | $ | 325.1 |  |  | 25.8% |  | $ | 215.5 |  |  | 18.9% |  |  |  |  |  |  |  |
Lumen Technologies | 125.2 |  |  | 9.9 |  | 156.8 |  |  | 13.7 |  |  |  |  |  |  |  |
Total other customers combined | 808.3 |  |  | 64.2 |  | 770.1 |  | 67.4 |  |  |  |  |  |  |  |
Total contract revenues | $ | 1,258.6 |  |  | 100.0% |  | $ | 1,142.4 |  |  | 100.0% |  |  |  |  |  |  |  |
See Note 6, Accounts Receivable, Contract Assets, and Contract Liabilities, for information on our customer credit concentration and collectability of trade accounts receivable and contract assets. Customer Type Total contract revenues by customer type during the three months ended April 26, 2025 and April 27, 2024 were as follows (dollars in millions):
| For the Three Months Ended |  |
| April 26, 2025 |  | April 27, 2024 |  |  |  |
| Amount |  | % of Total |  | Amount |  | % of Total |  |  |  |  |  |  |  |
Telecommunications | $ | 1,148.9 |  |  | 91.3% |  | $ | 1,026.8 |  |  | 89.9% |  |  |  |  |  |  |  |
Underground facility locating | 82.2 |  |  | 6.5 |  | 81.0 |  |  | 7.1 |  |  |  |  |  |  |  |
Electrical and gas utilities and other | 27.5 |  |  | 2.2 |  | 34.6 |  |  | 3.0 |  |  |  |  |  |  |  |
Total contract revenues | $ | 1,258.6 |  |  | 100.0% |  | $ | 1,142.4 |  |  | 100.0% |  |  |  |  |  |  |  |
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, our 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. As a result, our remaining performance obligations under the work orders not yet completed is not meaningful in relation to our overall revenue at any given point in time. We apply the practical expedient in Accounting Standards Codification Topic 606, Revenue from Contracts with Customers, and do not disclose information about remaining performance obligations that have original expected durations of one year or less.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-21 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 3A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482836/275-10-55-3A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-2A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-1 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 275 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/275/tableOfContent + Details
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