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CITY OF EVERETT WEST MARINE VIEW DRIVE/ALVERSON AND 41 ST ST/GRAND AVE <br />PEDESTRIAN IMPROVEMENTS <br />STATE FUND# HLP-PB15(032) <br />WO #3630 July 25, 2024 <br />13 <br />1 The survey work shall include but not be limited to the following: <br />2 <br />3 1. Verify the primary horizontal and vertical control furnished by the Contracting <br />4 Agency, and expand into secondary control by adding stakes and hubs as well <br />5 as additional survey control needed for the project. Provide descriptions of <br />6 secondary control to the Contracting Agency. The description shall include <br />7 coordinates and elevations of all secondary control points. <br />8 <br />9 2. Establish, the centerlines of all alignments, by placing hubs, stakes, or marks on <br />10 centerline or on offsets to centerline at all curve points (PCs, PTs, and PIs) and <br />11 at points on the alignments spaced no further than 50 feet. <br />12 <br />13 3. Establish clearing limits, placing stakes at all angle points and at intermediate <br />14 points not more than 50 feet apart. The clearing and grubbing limits shall be 5 <br />15 feet beyond the toe of a fill and 10 feet beyond the top of a cut unless otherwise <br />16 shown in the Plans. <br />17 <br />18 4. Establish grading limits, placing slope stakes at centerline increments not more <br />19 than 50 feet apart. Establish offset reference to all slope stakes. If Global <br />20 Positioning Satellite (GPS) Machine Controls are used to provide grade control, <br />21 then slope stakes may be omitted at the discretion of the Contractor <br />22 <br />23 5. Establish the horizontal and vertical location of all drainage features, placing <br />24 offset stakes to all drainage structures and to pipes at a horizontal interval not <br />25 greater than 25 feet. <br />26 <br />27 6. Establish roadbed and surfacing elevations by placing stakes at the top of <br />28 subgrade and at the top of each course of surfacing. Subgrade and surfacing <br />29 stakes shall be set at horizontal intervals not greater than 50 feet in tangent <br />30 sections, 25 feet in curve sections with a radius less than 300 feet, and at 10-foot <br />31 intervals in intersection radii with a radius less than 10 feet. Transversely, stakes <br />32 shall be placed at all locations where the roadway slope changes and at <br />33 additional points such that the transverse spacing of stakes is not more than 12 <br />34 feet. If GPS Machine Controls are used to provide grade control, then roadbed <br />35 and surfacing stakes may be omitted at the discretion of the Contractor. <br />36 <br />37 7. Establish intermediate elevation benchmarks as needed to check work <br />38 throughout the project. <br />39 <br />40 8. Provide references for paving pins at 25-foot intervals or provide simultaneous <br />41 surveying to establish location and elevation of paving pins as they are being <br />42 placed. <br />43 <br />44 9. For all other types of construction included in this provision, (including but not <br />45 limited to channelization and pavement marking, illumination and signals, <br />46 guardrails and barriers, and signing) provide staking and layout as necessary to <br />47 adequately locate, construct, and check the specific construction activity. <br />48 <br />49 10. Contractor shall determine if changes are needed to the profiles or roadway <br />50 sections shown in the Contract Plans in order to achieve proper smoothness and <br />51 drainage where matching into existing features, such as a smooth transition from <br />52 new pavement to existing pavement. The Contractor shall submit these