How long are mark outs valid?

In New Jersey, mark outs are typically valid for a period of 45 days. This timeframe is established to ensure that any excavation or construction work that could potentially interfere with underground utilities is conducted safely, minimizing the risk of contact with buried lines. Once the 45-day mark is reached, the original mark outs may become less reliable as conditions can change or new utilities may be installed, warranting a new mark out request for continued safety and compliance.

Understanding the duration of mark outs is essential for public works managers, as it directly impacts project planning, scheduling, and the overall safety of construction sites. After 45 days, if work has not commenced, a new request should be submitted to obtain current information about underground facilities.