Sunshine State One-Call 811 – Utility Location Requirements for South Florida Construction 2026

811 Sunshine State One-Call – Why Every South Florida Construction Project Must Call Before Digging

The number 811 is one of the most important numbers in South Florida construction. Before any excavation, drilling, or earth disturbance associated with a construction project anywhere in Miami-Dade County, Broward County, or Palm Beach County — regardless of how shallow or limited the dig may appear — Florida law requires that the contractor or property owner call 811 (Sunshine State One-Call of Florida, Inc.) at least two full business days before commencing any excavation. This requirement is not optional, it is not limited to large projects, and it is not waived by having a building permit. Failure to call 811 before excavation is a violation of Chapter 556 of the Florida Statutes — the Underground Facilities Damage Prevention and Safety Act — and can result in civil liability, criminal penalties, project shutdowns, and catastrophic consequences if underground utilities are severed.

What Is 811 Sunshine State One-Call?

Sunshine State One-Call of Florida, Inc. (811) is a non-profit corporation created under Florida law to administer the underground utility damage prevention program. When a contractor or property owner calls 811 (or submits a locate request online at sunshine811.com), the 811 center notifies all member utility companies of the excavation location and scheduled start date. Each utility company with underground infrastructure in the notified area is then responsible for sending crews to mark the location of their underground facilities using color-coded paint, flags, or stakes at the surface. The color code system is standardized: red marks electric power lines and cables; yellow marks gas, oil, and steam lines; orange marks communications, cable TV, and alarm lines; blue marks potable water; green marks sanitary sewers and drain lines; purple marks reclaimed water; and white marks proposed excavation area boundaries.

South Florida's Complex Underground Utility Infrastructure

South Florida's underground utility environment is among the most complex in the United States. Miami-Dade County, Broward County, and Palm Beach County contain decades of layered utility infrastructure — water distribution mains, sanitary sewer force mains and gravity mains, FPL electrical distribution lines in underground conduits, AT&T and other telecom conduits, Comcast and other cable television systems, natural gas distribution lines, and in some areas dedicated fiber optic networks for government or private communications. In addition to these registered utility systems, older properties throughout South Florida may have private utilities — underground septic tanks, well casings, private drainage systems, private electrical conduits — that are not registered with the 811 system and are therefore not marked. Private utilities must be located separately through property records research, utility records review, and site investigation methods such as ground-penetrating radar.

The Consequences of Striking an Underground Utility

The consequences of striking an underground utility line during excavation range from inconvenient to catastrophic. Severing an electrical conduit — especially an energized distribution line at 7,200 volts to 13,800 volts — can cause fatal electrocution of workers, electrical fires, and extended power outages affecting thousands of customers. Severing a natural gas line creates an immediate explosion and fire risk. Severing a water main floods the excavation and surrounding area, disrupts water service to nearby properties, and can undermine the foundation of adjacent structures. Severing a telecommunications conduit disrupts internet, telephone, and emergency communications services, sometimes for extended periods. Severing a sanitary sewer line creates a sewage spill requiring environmental remediation. The contractor who strikes an unmarked utility after properly calling 811 may not be liable for the damage — but the contractor who strikes a utility without calling 811 is automatically liable for all damages, however extensive.

Timing Requirements for 811 Calls

Florida Statute 556.105 requires that excavators call 811 or submit an online locate request at least two business days (not calendar days) before the start date of excavation. If excavation is planned to begin on Monday, the 811 notice must be submitted by close of business on the preceding Wednesday (assuming no intervening holidays). Utility companies have two full business days to mark their facilities after receiving the 811 notification. Beginning excavation before the two-business-day waiting period has elapsed, or beginning excavation without having called 811 at all, constitutes a violation of Chapter 556 regardless of whether any damage occurs. For emergency excavation situations — a broken water main that must be repaired immediately — emergency notification procedures are available through 811, though this is intended only for genuine emergencies, not for contractors who failed to plan ahead.

811 Requirements by Excavation Type

The 811 call requirement applies to all types of excavation regardless of depth or equipment type. The following excavation activities require a prior 811 call: digging with excavators, backhoes, or trenchers; drilling for piers or piles; augering for poles or fence posts; directional boring for utilities; hand digging; hydrovac excavation; root pruning near utility lines; installation of stakes or pins for surveying; and any other earth disturbance that has the potential to contact underground facilities. There is no minimum depth threshold — even digging six inches with a hand shovel in an area with underground utilities requires a prior 811 notification.

811 and Pool Construction

Swimming pool excavation — one of the most common residential construction activities in South Florida — requires an 811 notification before any excavation begins. Pool excavations in South Florida are typically 4 to 6 feet deep, placing the excavation well within the depth range of underground utility distribution systems. Pool contractors who call 811 before beginning excavation and who encounter marked utility lines in or near the pool area must design around the utility conflicts or request utility relocations (which require separate permits and involve additional USD costs and project timeline impacts). Pool excavation that encounters an underground septic tank — a situation common in older South Florida neighborhoods — must stop immediately while the septic tank is properly addressed. 811 does not mark private septic systems; these must be located through separate investigation.

Construction Project Planning and 811

811 notifications expire after a specific period — in Florida, the typical validity period for a location notice is 30 days. For large construction projects that involve ongoing excavation over a period of several months, contractors must re-notify 811 periodically to ensure that utility markings remain current and visible. Markings painted or flagged on the ground by utility locators can be disturbed or obscured by ongoing construction activity, weather, or vegetation. When utility markings are no longer clearly visible, they must be re-marked through a new 811 notification. The permanent record of 811 notifications submitted for a construction project — along with the verification that utility locators appeared and marked their facilities — provides important documentation in the event of a utility damage incident or legal dispute.

Government Agency 811 Compliance

Government agencies — including Miami-Dade County, Broward County, Palm Beach County, and municipalities — are also required to call 811 before their public works crews perform excavation. County road maintenance crews, utility repair crews, and public parks department landscaping crews must all comply with Chapter 556 requirements. Government workers who strike underground utilities without calling 811 are subject to the same statutory liability as private contractors. Endless Life Design advises clients on 811 compliance requirements for all construction phases and verifies that 811 notifications are properly submitted and documented before excavation begins on any project.

USD Costs of 811 Non-Compliance

The financial consequences of striking an underground utility without calling 811 can be enormous. Utility company repair costs for a severed transmission-level electrical cable can reach $500,000 USD or more. Natural gas line repair costs, clean-up costs, and regulatory penalties for a gas line strike can exceed $100,000 USD. Telecommunications line repair and service restoration costs run from $10,000 USD to $500,000 USD depending on the type of facility and the scope of service disruption. In addition to repair costs, contractors who damage utilities without calling 811 face civil liability for all resulting damages — including consequential damages claimed by businesses or institutions that suffered service outages. Compared to these potential liabilities, the cost of calling 811 — which is free — is perhaps the most favorable risk management investment available to any construction contractor in South Florida.