8514 SHADOW WOOD DR Lot 3 2024-03-29

D. New Roads Backfill compaction for new road construction should be accomplished by mechanical compaction per WSDOT/APWA Specifications. Compaction up to the top 2 feet of a trench by water settling may be done provided the entire water -settled portion of the trench reaches 95% maximum density and the top 2 feet of the trench consists of Controlled Density Fill as specified in Section 8-07 of this chapter. E. Testing Consistent with the above requirements and prior to placing any surface materials on the roadway, it shall be the responsibility of the utility/developer/contractor to provide density test reports certified by a professional engineer licensed in the State of Washington. A minimum of 1 density test shall be taken within every 200 feet of trench length and at depths of 50 percent of trench depth and at the surface, or as specified by the Engineer. Compaction of laterals or service line trenches shall be tested where required by the Engineer. Certified copies of all test results shall be provided to the County. F. Notification and Inspection 1. Consistent with Chapter 9 of these Standards, any developers, utilities, or others intending to trench in existing or proposed county right-of-way shall notify the Department of Planning and Development Services Inspection Section not less than 3 working days prior to performing the work. This notification shall include: Location of the work ii. Permit number iii. Method of compaction to be used iv. Day and hour when compaction is to be done v. Day and hour when testing is to be done 2. As set forth in Chapter 9, failure to notify may necessitate testing or retesting by the County at the expense of the developer or utility. At the Engineer's discretion, the work may be suspended pending satisfactory test results. G. One Call System 1. Underground utilities shall comply with Chapter 19.122 RCW ("Underground Utilities"). For reference purposes, the Underground Utilities Location Center One Number Locater Services phone number is 811. 8-06 UTILITY INSTALLATION ON ROADWAY STRUCTURES A. General Attachment of utility lines to a roadway structure, including bridges, may be allowed where such attachment conforms to sound engineering practice for preserving the roadway structure and ensuring its safe operation, maintenance and appearance. Attachment of any utility to any bridge within the county road right-of-way requires the approval of the County Bridge Engineer. 8-13 Engineering Design and Development Standards September 17, 2021