Gilco Group Inc​.

CA Locating / CA Traffic Control / Advanced Telecommunications lic#803509

Need to know before you dig


Address:4005 Port Chicago Hwy
Suite 100
Concord CA 94520
M - F 0600 - 1900
Advance Notice:

Minimum 2 working days with a maximum of 14 calendar days Number of days in advance of a digging

project that you need to notify the one call center of your intent to dig. 
Marks Valid:28 days or when they are no longer reasonably visible
Defines the period of time the facility marks (paint, flags, stakes, etc.) are valid according to state law or practice.

I am committed to providing you with the MOST accurate utility service available anywhere. I have the leading and state of the art electromagnetic signal tracing equipment and Ground Radar technologies available. However, no method of underground utility locating can ever guarantee 100% accuracy or completeness.

There are many variables and conditions such as soil type, soil moistures, facilities age and maintenance to name a few that can adversely affect my equipment when locating utilities. On rare occasions such conditions may even result in errors or omissions beyond my control.

To help with eliminating these issues I carry multiple different kinds locating devices and continue to back track over the same area to give me the confidence that I have given as thorough and accurate information as I possibly can. With my over 20 years of experience also gives me a full range of knowledge of where utilities should be as well as where they might be hiding. This important edge far exceeds the advantages of the locating equipment.

The more information you can provide about your site, the more complete and efficient my work will be. For the best results I ask if you can provide as much of the following information as possible.

*Copies of any available schematics, plans or as-built drawings (In PDF)

*At least one site contact, including name, title, telephone and email address.

*Access to all utility buildings, mechanical rooms, etc. within and around the area to be located.

I shall not be held liable for any excavation or underground work related to damage to any utility not shown on prints, maps, plans, as-built drawings or other documents provided or having NO serviceable connection points or visible surface structure within the requested area of investigation and/or the presence of said utility is not otherwise made evident to me before the performance of my work.

I assume no liability for damages to any utility owned or maintained by public utility providers. (i.e. PG&E, SMUD, Charter, Level 3, City owned utilities, AT&T, Comcast etc.) These providers are to be typically protected by state mandated One-call service. 811 Dig Alert

California law stipulates that that before commencing any work you must give prior notice by calling in for a Underground Service Alert ticket.

In the course of my work there are times when I must mark facilities owned by public utility providers in order to eliminate from our search process.  Marks placed on utilities facilitate this process should never be relied upon in lieu of contacting public utility locators as mandated by state or federal laws.

Before you dig… ALWAYS CALL  811.

Before You Dig

What is 811?

811 is the phone number you call before digging to protect yourself and others from unintentionally hitting underground utility lines.

There are millions of miles of buried utilities beneath the surface of the earth that are vital to everyday living like water, electricity and natural gas.

811 is the federally designated call before you dig number that helps homeowners and professionals avoid damaging these vital utilities. When you make the free call to 811 a few days before you dig, you'll help prevent unintended consequences such as injury to you or your family, damage to your property, utility service outages to the entire neighborhood and potential fines and repair costs.

Do I need to call 811?

Yes!  Any type of digging requires a call. Building a deck? Planting a tree? Installing a fence or mailbox? 811 is the number you should call before you begin any project.

Making the call

Call 811 from anywhere in the country a few days prior to digging, and your call will be routed to your local one call center. Tell the operator where you're planning to dig.  Your affected local utility companies will be notified about your intent to dig and will send locators to your dig site to mark the approximate location of buried lines with flags or paint.

Remember:  Always call 811 before you start any digging project! You can help avoid injury, expense, embarrassment and a very inconvenient day without critical services like electricity, internet or phone.

When can I begin my digging project?

Wait for the marks! Utilities will mark their buried lines on your dig site.

Most locate crews will arrive to mark your dig site with paint or flags within a few days and will make sure you know where to avoid digging so you don't hit buried utilites.  Remember the depths of utility lines may vary and there may be multiple utility lines in the same area.  Be sure to check your state laws for specific information.

What's next?

Digging Safely

You called before digging, waited for your lines to be marked, and now it's time to roll up your sleeves and get to work!  Make sure to always dig carefully around the marks, not on them. Some utility lines may be buried at a shallow depth, and an unintended shovel thrust can bring you right back to square one - facing potentially dangerous and/or costly consequences. Don't forget that erosion or root structure growth may shift the locations of your utility lines, so remember to call again each time you are planning a digging job. Safe digging is no accident!Type your paragraph here.