Are these near a storm drain?
I had similar issues that were caused by the drain pipe below. The pipe was lined after the hole was filled a few times.

Thank you for using VB Works to report a concern to the City of Virginia Beach. Your service request has been forwarded to Public Works/Operations for investigation. For more information or a status update on your request, you can contact them directly at 757-385-1470. Please be sure to identify your concern as having come in via SeeClickFix/VB Works any time you call about these requests. Not all departmental personnel are involved in using this system.

311 Citizen Services - CS11 u xilsaaray arrinkan Public Works Operations - PW Clerk

Public Works has been notified of your concern and service request 91553905 has been created. For more information or a status update on this request, please contact Public Works at 757-385-1470.