12-inch minimum diameter, larger if drainage requires, as directed by the County Engineer - County Road Standards, Drawing 508.D-1.
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The Engineering Division administers the Whatcom County Development Standards. Please refer to Chapter 5 - Road Standards.
Private residential driveways (1 and 2 residential units) outside of county rights-of-way are typically reviewed by the Fire Marshal in Planning and Development Services at 360-778-5900.
It’s a paved approach to an intersecting county road extending from the property line or a driveway approach abutting a paved public road. For details see Drawing 508.D-4, 505.E-3, 505.E-4 of the Road Standards - Chapter 5.
That will be determined by the Right-of-way Inspector after you have applied for a Revocable Encroachment Permit.
Other federal, state and local permits may be needed. Check with the local jurisdictions/districts for water and sanitary sewer hookup information. A good resource for checking what federal or state permits you may need for your development is a handbook titled “Commonly Required Environmental Permits for Washington State.”
Development Standards - Chapter 2 - Stormwater Management requires, as a minimum, that a Preliminary Stormwater Proposal be submitted. The Proposal is intended to provide the county with a general overview as related to a proposed project. The information will be used to determine which regulations apply and whether to require a more detailed Stormwater Design Report.
County road projects are principally funded by local funds generated via road taxes. However, the use of local county funds can be diminished by supplemental funds from a variety of sources. These supplemental funds are received by applying and completing a Whatcom County project with other counties’ and cities’ projects. A few of the various funding sources are federal bridge replacement funds, federal road project funds, state transportation improvement board funds, state rural arterial preservation funds and federal hazard elimination funds.