07-27-20 Regular Meeting of the La Porte City Council (2)

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April 22, 2020 Proposal for Survey Page No. 2 In general, the scope for work will be including the following items and tasks: Item 1: Topographic Survey: Horizontal and vertical controls will be established and tied to the Texas State Plane Coordinate System, South Central Zone NAD 83 and datum NAVD 88. Survey will be tied to the City of La Porte monument (if available) or nearby NGS monument. Survey will also be tied to the nearby TSARP monument. Cross sections will be surveyed at every 100 feet interval along the project route. All planimetric features will be surveyed along the corridor for a width of ROW+10’. All visible existing utilities (i.e. manholes, culverts, power poles, etc.) will be located and pipe size and flow line measure downs in the manholes, inlets (as available and that can be opened) will be obtained. Texas one-call system will be notified, and pipeline companies will be contacted to probe and mark their pipeline (if any) locations to be tied to the survey. All level A & B SUE findings (explored by SUE surveyor) will be surveyed Attempt will be made to recover and verify enough monumentation along the existing roadway to establish estimated right-of-way lines for topographic surveying scope. Task of establishing estimated ROW may involve some limited abstracting and deed research, however, detail boundary category survey is excluded in determination. Signed and sealed field books containing notes as well as ASCII files of point numbers, coordinates, and descriptions will be provided. Boreholes will be located in the field and will be shown in the AutoCAD plan drawing Item 1: Basemap Plan & Profile Coordinate with private utility companies and City of La Porte for record drawings Perform utility research and delineation of underground utility lines from available record drawing and surveyed information Prepare profile for ground lines corresponding to the center line of the street, center line of the ditch/curb lines, right-of-way lines for the streets as shown in the attached table. Prepare profile view of existing utilities for the same streets from available record and field information All deliverables will be as long strip in the AutoCAD format with side text on the top and bottom boundary of the drawing. Item 3: Survey Control Map A survey control map will be prepared showing swing ties to traverse and baseline points as well as TBM’s. The survey control map will be signed and sealed by a Registered Professional Land Surveyor in charge of the project. Item 4: Surveying SUE Findings Recover controls and reestablish as necessary Survey Level A & B SUE findings as marked by SUE Surveyor Incorporate surveyed information in the topo and utility drawing To our understanding the following are excluded from the scope of this proposal Boundary level survey for determining of right of way of the street Any Level A and B SUE category survey Construction phase survey (including staking design centerline) Accessing/opening electric and communication manholes (if any) Surveying any confined space of large manhole structure (if any) Surveying main lanes of SH 146