March 2025One-Call Directory

Turning Awareness into Action: 811 Call Centers
Surveys and studies reveal that professional excavators/contractors are highly aware of Common Ground Alliance’s (CGA) 811 initiative that requires they (as well as landscapers and homeowners) contact their state’s OneCall Center so underground utility lines are identified and marked before breaking ground.However, awareness is not enough.Damage from hitting underground utilities during excavation – service interruption, property harm, costly fines and repairs, and personal injury – continues to happen, at an annual cost of $30 billion in the U.S. CGA also reports that more than half of these reported damages were caused by professional contractors/excavators and the most-common root cause was “no notification made to 811.” Clearly, contractors/excavators must use 811 – before beginning every project that involves excavation or directional drilling – to protect yourselves, your crews, property and communities.It’s as simple as calling 8-1-1, from within the state the digging is to occur – within the required timeframe. You answer basic questions about the location and details of the digging project, then get a ticket number and instructions.Even more convenient, contractors/excavators can use the states’ online systems. These allow you to submit a locate request and get a ticket, any time, any place, via Internet connection. Once signed up and logged in, many also provide access to ticket search, update and track, positive response, mobile app and other functions.To facilitate and support your consistent and effective use of 811, the following directory provides links to each state’s 811 website(s), for comprehensive information about safe-digging regulations, processes and guidelines. It also shows links to the state’s “Online System” (or “Portal”) for real-time access to locate requests and more.In addition, the directory shows each state’s specific law or practice, regarding the minimum amount of time to notify 811 before you intend to dig (“Advance Notice”) and how long you have to complete the requested excavation (“Marks Valid”), as available.Call or Click 8-1-1Directory is based on CGA’s “811-in-your-state”AlabamaAlabama 811Online SystemAdvance Notice: 2 working daysMarks Valid: 20 working daysAlaskaAlaska 811Online SystemAdvance Notice: 2 business days; 10 business days in remote locations ArizonaArizona 811Online SystemAdvance Notice: 2 working daysMarks Valid: 15 working daysArkansasArkansas 811Online SystemAdvance Notice: 2 working daysMarks Valid: 20 working days from date of issueCaliforniaAdvance Notice: 2 working daysMarks Valid: 28 daysUnderground Service Alert of Northern & Central California (USAN)Online SystemDig Alert (Southern Calif.)Online SystemColoradoColorado 811Online SystemAdvance Notice: 2 daysMarks Valid: 30 daysConnecticutCall Before You DigOnline SystemAdvance Notice: 2 working days; maximum 30 daysDelawareDelmarva 811Online SystemAdvance Notice: 2 business daysMarks Valid: 10 business daysFloridaSunshine 811Online SystemAdvance Notice: 2 business daysMarks Valid: 30 calendar daysGeorgiaGeorgia 811Online SystemAdvance Notice: 3 daysMarks Valid: 30 calendar daysHawaiiUtility Notification Center-HawaiiOnline SystemAdvance Notice: 5 working daysMarks Valid: 28 calendar daysIdahoAdvance Notice: 2 business daysMarks Valid: 4 weeksDIGLINE (state-wide, except five counties shown below)Online SystemNorth Idaho 811 (Bonner, Boundary, Shoshone & Benewah Counties)Online SystemKootenai County One CallOnline SystemIllinoisAdvance Notice: 28 hours; maximum 14 calendar daysMarks Valid: Life of ticket, or marks become indistinguishableJulie (statewide)Online SystemChicago (metro area)
Online SystemIndianaIndiana 811Online SystemAdvance Notice: 2 working daysMarks Valid: 20 daysIowaIowa One CallOnline SystemAdvance Notice: 2 working daysMarks Valid: 25 calendar daysKansasKansas 811Online SystemAdvance Notice: 2 working daysMarks Valid: 20 calendar daysKentuckyKentucky 811Online SystemAdvance Notice: 2 working daysMarks Valid: 21 daysLouisianaLouisiana 811Online SystemAdvance Notice: 2 business daysMarks Valid: 20 calendar days (as long as visible)MaineDig SafeOnline SystemAdvance Notice: 3 business daysMarks Valid: 60 daysMarylandMiss UtilityOnline SystemAdvance Notice: 2 business daysMarks Valid: 12 business daysMassachusettsDig SafeOnline SystemAdvance Notice: 3 business daysMarks Valid: 30 daysMichiganMiss Dig 811Online SystemAdvance Notice: 72 hours; maximum 14 daysMarks Valid: 21 daysMinnesotaGopher State One Call (GSOC)Online SystemAdvance Notice: 48 hoursMarks Valid: 14 calendar daysMississippiMississippi 811Online SystemAdvance Notice: 3 working daysMarks Valid: 14 calendar daysMissouriMissouri 811Online SystemAdvance Notice: 2 working daysMarks Valid: As long as visibleMontanaMontana 811Online SystemAdvance Notice: 2 business daysMarks Valid: 30 daysNebraskaNebraska 811Online SystemAdvance Notice: 2 business daysMarks Valid: 17 business daysNevadaUnderground Service Alert North (USAN)Online SystemAdvance Notice: 2 working daysMarks Valid: 28 calendar daysNew HampshireDig SafeOnline SystemAdvance Notice: 3 business daysMarks Valid: 30 daysNew JerseyNew Jersey One CallOnline SystemAdvance Notice: 3 business daysMarks Valid: 45 business daysNew MexicoNM 811Online SystemAdvance Notice: 2 working daysMarks Valid: 15 working daysNew YorkAdvance Notice: 2 working daysMarks Valid: 10 working daysUDig NY (state-wide, except NYC and Long Island)Online SystemNew York 811 (NYC and Long IslandOnline SystemNorth CarolinaNC 811Online SystemAdvance Notice: 3-12 working daysMarks Valid: 15 working daysNorth DakotaNorth Dakota 811Online SystemAdvance Notice: 2 business daysMarks Valid: 21 calendar daysOhio
Ohio 811Online SystemAdvance Notice: 48 hoursMarks Valid: As long as visibleOklahomaOKIE 811Online SystemAdvance Notice: 48 hours; maximum 14 daysMarks Valid: 14 business days, depending on visibilityOregonOregon 811 Utility Notification CenterOnline SystemAdvance Notice: 2 daysMarks Valid: 45 days; 30 days effective April 2025PennsylvaniaPennsylvania 811Online SystemAdvance Notice: 3-10 business days (Construction phase); 10-90 business days (Design phase)Marks Valid: As long as equipment is kept onsiteRhode IslandDig SafeOnline SystemAdvance Notice: 72 hours excluding weekends and holidaysMarks Valid: Life of excavationSouth CarolinaSouth Carolina 811Online SystemAdvance Notice: 3 working daysMarks Valid: 15 working daysSouth DakotaSouth Dakota 811Online SystemAdvance Notice: 48 hoursMarks Valid: 21 working days, providing marks are visibleTennesseeTennessee 811Online SystemAdvance Notice: 3 working days; maximum 10 working daysMarks Valid: 15 calendar daysTexasTexas 811Online SystemAdvance Notice: 2 working days; maximum 14 daysMarks Valid: 14 daysUtahBlue Stakes of Utah 811Online SystemAdvance Notice: 2 business days/48 hoursMarks Valid: 14 calendar daysVermontDig SafeOnline SystemAdvance Notice: 72 hoursMarks Valid: 30 daysVirginiaVA 811Online SystemAdvance Notice: 48 hoursMarks Valid: 15 working daysWashingtonWashington 811Online SystemAdvance Notice: 2 business daysMarks Valid: 45 daysWashington, D.C.Miss Utility 811Online SystemAdvance Notice: 2 business daysMarks Valid: 15 business daysWest VirginiaWest Virginia 811Online SystemAdvance Notice: 2 daysMarks Valid: 10 days, while visibleWisconsinDiggers HotlineOnline SystemAdvance Notice: 3 working daysMarks Valid: Length of project, if maintainedWyomingWyoming 811Online SystemAdvance Notice: 2 business days Marks Valid: 14 business daysCANADAIn Canada, the One Call System applies, but the 8-1-1- phone number does not. Instead, use the specific phone number for each province/state, if provided, below.Alberta(800) 242‑3447Utility Safety PartnersOnline SystemAdvance Notice: 3 working daysMarks Valid: 30 daysBritish Columbia(800) 474-6886BC One CallOnline SystemAdvance Notice: 3 working daysMarks Valid: 30 calendar daysManitobaClick Before You Dig MBOnline SystemAdvance Notice: 3 working daysMarks Valid: 30 daysNew Brunswick(866) 344-5463Info ExcavationOnline SystemAdvance Notice: 3 working daysMarks Valid: 20 calendar daysNewfoundland(800) 663-9228Info ExcavationOnline SystemAdvance Notice: 3 working daysMarks Valid: 30 calendar daysNova ScotiaInfo ExcavationOnline SystemAdvance Notice: 3 working daysMarks Valid: 30 calendar daysOntario(800) 400-2255Ontario One CallOnline SystemAdvance Notice: 5 business daysMarks Valid: 60 daysPrince Edward Island(866) 344-5463Info ExcavationOnline SystemAdvance Notice: 3 working daysMarks Valid: 30 calendar daysQuebec(800) 663-9228Info ExcavationOnline SystemAdvance Notice: 3 working daysMarks Valid: 30 calendar daysSasketchewan(866) 828-4888Sask 1^st CallOnline SystemAdvance Notice: 3 business daysMarks Valid: 30 calendar days UICoverAd—Melfred BorzallContentsAd—HardRock InfrastructureMastheadAd—OBIC HVEditor's LogAd—Hi-VacNewslinePodcastsAd—UIC 2025 Thank you SponsorsDirectional Drilling—MearsUIC ReviewUIC Review—WilliamsSafety—Competent personDCA PresidentAd—UIC 2026 Save the dateInfrastructure—CanadaInside InfrastructureOne-Call DirectoryAd—H2T CircRehab Technology—NASSCO Tech TipsRehab Technology—Recycled water truck nozzlesRehab NewsRehab News—VortexAd—PGJCircBusinessBusiness PeopleNew ProductsBusiness cardsCalendar of EventsSales OfficesAd—UI Subscriptions