TIS 2023-08-07 Item 2B - Contract - S 149th & S 150th St Watermain Replacement Design and Construction Management with WSP

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General The CONSULTANT shall survey all observable surface features within the surveying limits. Features may include, but are not limited to the following: • All traffic signal equipment, including handholes, signals cabinets, signal poles, span wires, pedestrian pushbuttons, vehicular signal heads, and pedestrian signal heads • Top of curbs, bottom of curbs, flow lines, front and back of sidewalk, and all grade breaks and limits associated with driveways and curb ramps • Walls and rockeries • Pavement surfaces (identified by type) and joints between dissimilar paving materials. Profiles of the existing street surface will be surveyed along the edge of pavement and pavement crown. These points will be surveyed at intervals of 10 -foot minimum and/or 25 --foot maximum. Pavement cross section intervals will be spaced at a minimum of 10 -feet and maximum of 25 -feet. • Existing curb ramps • On street parking delineations • General vegetation, significant trees (evergreen and deciduous) with caliper diameter and canopy diameter as estimated from the ground. Significant trees are defined as taller than 15 feet with a trunk diameter of 6 inches or greater. • Existing overhead utility lines • Ground measurements will be captured sufficient to generate an accurate digital terrain model (DTM) at 1 -foot contours. • Building overhangs and awnings within the right-of-way • Bridge deck corners and bridge deck joints • Bridge column and/or footing locations • Sensitive areas, including wetland and wetland buffers (flagged as defined in Task 7) • Geotechnical explorations (as defined in Task 6) • The field survey work will include elevations along the top of rail at 25 -foot increments starting at 100 -feet up -rail and extending to 100 -feet down -rail of the bridge crossing. • Vertical clearance from top of trail to the soffit of the existing bridge superstructure. Utilities The CONSULTANT shall survey surface observable utilities within the project limits. • Surface observable utilities to include all visible utility castings, power poles, guy wires and anchors, street light poles, vaults, risers, fire hydrants, culverts, survey monument castings, and overhead utility lines. • Stormwater and sanitary sewer structures (catch basins and storm drain manholes) center of lids only. • Stormwater and sanitary sewer structures and inverts will be obtained. Private Property/Beyond Right -of -Way At a minimum, the CONSULTANT shall survey the following pertinent features on private property within the project limits. City of Tukwila S 149th St to S 150th St Water Main Replacement WSP, 202311491 Tukwila, Washington July 2c Page 12 of 16