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Customer Concentration and Revenue Information (Tables) | 3 Months Ended
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Apr. 26, 2025
Risks and Uncertainties [Abstract] |
Schedule that Represents A Significant Portion of the Company’s Customer Base and Each Over 10% of Total Revenue | Customers whose combined amounts of accounts receivable and contract assets, net, exceeded 10% of total combined accounts receivable and contract assets, net as of April 26, 2025 or January 25, 2025 were as follows (dollars in millions):
| April 26, 2025 |  | January 25, 2025
| Amount |  | % of Total |  | Amount |  | % of Total
AT&T Inc. | $ | 175.8 |  |  | 11.4% |  | $ | 127.7 |  |  | 9.4%
Charter Communications | $ | 202.3 |  |  | 13.2% |  | $ | 158.9 |  |  | 11.7%
Lumen Technologies | $ | 250.7 |  |  | 16.3% |  | $ | 287.1 |  |  | 21.1%
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% |  |  |  |  |  |  |  |
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% |  |  |  |  |  |  |  |

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- Definition Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-18 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-20 + Details
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