THURSTON COUNTY PUBLIC WORKS

Development Review
Encroachment

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Encroachment Permits/ New Driveway Permits

Why is an encroachment permit required?
An encroachment permit is required so we can maintain adequate drainage systems along each road without interfering with ingress/egress of each land use parcel. Safety factors such as available sight distance, proximity to nearby intersection/driveway and road classification all may impact the location of the driveway.

Any Stipulations?
Access to arterial roadways shall be spaced at intervals of 500 feet, collectors 300feet, and local roads 130 feet from nearby public or private intersection. A driveway serving two or more dwellings is considered a road. (See Arterial/Collector Roadways Map.) A paved apron must be constructed for two or more parcels accessing an arterial or collector. (TCRS, Section 7.04 & Appendix 7-A)

Where do you get the permit?
Permits may be obtained from Development Review in The County Courthouse, Building 1, 2nd Floor, at the Permit Assistance Center.

Is there a fee?
The permit fee is $40 and the property owner is responsible for the installation and costs. There may be other review fees associated with the permit.

What does the inspector look for on the first inspections?
Inspectors look for drainage issues (i.e. culvert size), and available site distance.

What is the next step?
A letter will be mailed to the property owner informing the owner if the culvert is or is not required, the culvert installation expiration date, and if there will be any further stipulations required.

Final Step:
The property owner will need to call Thurston County Development Review Section at
357-2493 to request a final inspection when completed.

References:
Thurston County Road Standards, New Driveways, Section 4.07
Thurston County Road Standards, Access Points, Section 7.04, 7.05, & 7.06
Thurston County Road Standards, Appendix 7-A, 7-B

Other Helpful Links

County Code
WA State Dept of Transportation
City of Olympia
City of Lacey
City of Tumwater
CRAB - County Rd Admin Board
Storm & Surface Water Policy Regarding Pump Stations

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