2021 CHESTNUT ST 2016-01-01 MF Import

lrerracon July 24, 1997 pROJECTTEAM 8r 10-1S/m Awmn NE Rednab.WUNrqton 98052 (Y06�EE1d000 F�i(208)BGItOSO Bechtel Corporation 8140 Old Highway Southeast Tumwater, Washington 98501 Attention: Mr. Jim Collins Re: Geotechnieal Engfneering Report Proposed U.S. West Tower Site SEA•11bD 3200 20th Street Everett, Waahtnpton GeoEngineercl ProJect No. 6408-001-01, Task 16 Terracon Project team has compieted geotechni,:al engineering exploration for the proposed US West Tower Site SEA-115D to be iocated at 3200 20th SLeet in Everett, Washfngton. A Sketch showing the tower focation was provided by Mr.Jim Collins of Bechtel,a copy of which is attached as Figure 1. This study was perfortned in general accordance with the scope of work (Exhibit A) contained in the Terracon ProJect Team contract with Bechtel dated September 24, 1996. The purpose nf these services is to provide geotechnfcal engineering recommendations for design of foundations and other earth comected phases of the project. Propoaed Construction: As currently planned, construction on the sita will include a monopole cellular transmission tower and ancillary support equipment. The proposed monopole tower will be approximately 150 feet in height and will be supported on a drilled shaft foundadon system. Maximum vertical loading at the base of the monopole and maximum overtuming moment are not available at this time. We exped that further consultaUon may be necessary once the loads have been detertnined. Scope of Servicea: The scope of the services perfortned for this project included e subsurface exploration program, laboratory testing and engineering analyses. One test boring was drilled on the site at the location of the proposed monopole tower. Selected soil samples were tested for the following engineering properties: • Water content • Dry Density • Compression • Expansion • pH • Resistivity • Water soluble sulfate content GEOTECMNICAL,ENVIROHMENTAL ANU MATERULS ENOINEENa OUALT'ENOINEENMO SINCE 1Yl6