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<br /> 5 3/1/2021 <br /> <br />Manhole No. 7 <br />This manhole has an 18-inch pipe entering and an 18-inch pipe exiting the structure. The <br />structure is 13.5 feet deep and 4.5 feet in diameter. The pipe length filled was 90 inches on the <br />inlet pipe and 90 inches on the outlet pipe. An estimated 12 cubic yards of CDF filled the pipes <br />and manhole. <br />Manhole No. 8 <br />This manhole has an 18-inch pipe entering and a 30-inch pipe exiting the structure. The <br />structure is 14-feet deep and 6-feet in diameter. The pipe length filled was 90 inches on the <br />inlet pipe and 150 inches on the outlet pipe. An estimated 20 cubic yards of CDF filled the pipes <br />and manhole. <br />Manhole No. 9 – (or Vault) <br />This structure is a vault rather than a manhole. The structure has a 30-inch pipe entering and a <br />30-inch pipe exiting the structure. The vault was smaller than expected. The pipe length filled <br />was 90 inches on the inlet pipe and the outlet pipe. Both the inlet and outlet pipe were capped <br />at the structure to allow complete filling and blocked to prevent water from entering or exiting. <br />The total volume of CDF to abandon this vault and piping was approximately 20 cubic yards. <br />End of Pipe for PS 04 <br />The pipe west of Manhole No. 9 is attached underneath the wharf and is a 30-inch diameter <br />clay-tile pipe. City crews planned to plug the accessible end of pipe with a mechanical plug <br />during low tides in July 2020. Due to the cleanup effort going on during the summer of 2020, <br />city forces could not access the wharf area to install the plug . This work is now being <br />coordinated with the Port of Everett and installation of the mechanical plug is now scheduled <br />during a low tide cycle the last week of March 2021. <br />Once the mechanical plug is installed photos will be emailed to Ecology. <br /> <br /> <br /> <br /> <br /> <br />