Attachment_2_Amendment_No_0003_0003.pdf
PDF 651 KB Posted
- Attached to
- FKC Middle Reach Capacity Correction Project Phase Federal contract opportunity
- Solicitation number
- 140R2020R0009
About this file
This document provides specifications for surveying services required for the FKC Middle Reach Capacity Correction Project Phase 1. The solicitation is being conducted by the Department of the Interior Bureau of Reclamation. Services include an initial design survey, subsidence monitoring surveys annually during construction to track elevation changes at bridge decks and benchmarks, pre-construction surveys of roadways and pipelines to determine design adjustments due to subsidence, surveys of existing county roads where new siphons will be installed, and photographic and video documentation of pre- and post-construction conditions. Respondents must provide details on survey instrumentation, procedures, raw data, and submittal requirements in digital formats including Excel and DVD. Aerial photographs must be taken according to the specifications of Tulare County both before and after project locations.
View the file
Other files for this federal contract opportunity
Show all 50
FKC Middle Reach Capacity Correction Project Phase has more files on GovTribe.
On GovTribe
Work with this file on GovTribe
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
Solicitation No: 140R2020R0009 Specifications No. 20-C0907
STANTEC/184031016
FKC MIDDLE REACH CAPACITY CORRECTION PROJECT PHASE 1
SURVEYING
PAGE 01 71 20 - 8
5. Explanatory notes about conditions(s) that might affect accuracy or result of survey.
6. Instrument data:
a. Instrument model(s) and serial numbers, including GPS antenna type(s), offsets, measurement to ARP (Antenna Reference Point), atmospheric conditions entered, curvature and refraction constant, sea level correction, scale factor, prism model and offset.
b. Care and adjustment of instruments including pegging the leveling instrument, level rod length checks, use of rod levels, collimation of total stations, prism model and offsets, and other pertinent information.
7. Survey location.
8. Diagrams or sketches.
9. Pertinent record information and references.
10. Original “raw” data values (without mathematical manipulations and without corrections for errors) of distance, angle, and elevations.
11. Monuments found or set; with complete descriptions (e.g., found 5/8-inch rebar with 1 ½-inch plastic yellow cap, including markings), and description of stampings.
12. Consecutively number pages in upper right hand corner.
3.6 SUBSIDENCE MONITORING SURVEYS DURING CONSTRUCTION
A. Conduct an annual RTK-GPS field survey of bridge decks and check structures (approximately 20 locations) between the Tule River Check and the Woollomes Check, approximately 26 miles in distance. Survey 8 brass cap benchmarks (5th Ave Check, Tule River Check, Deer Creek Check, White River Check, Lake Woollomes Check, Poso Creek Check, Shafter Check and Kern River Check). Prepare a 1-page summary report outlining the methods and procedures used to complete the survey.
The methods and procedures will be consistent with the survey work prepared previously for the Project. Subsidence monitoring survey data files in the form of an excel spreadsheet showing the survey control shall be submitted annually.
B. Regional land subsidence has continued from the period of the August 2018 design survey and will continue during construction. The flat section of the buried siphon structures and certain pipelines must maintain design cover below the roadways.
1. Prior to approval of siphon shop drawings and within 60 calendar days of starting road excavation for siphon construction, the CONTRACTOR shall conduct an existing grade pre-construction survey at roadways to determine the subsidence that has occurred since August 2018. The GOVERNMENT will then compare this data to the 2018 design to prepare design adjustments to siphon invert elevations of flat sections, if necessary. At a minimum, this survey shall consist of three spot elevations along the road centerline consisting of one point at the siphon centerline and one point each at the east and west siphon edges.
Attachment 2 Amendment No 0003 swolfert Polygon
FKC MIDDLE REACH CAPACITY CORRECTION PROJECT PHASE 1
SURVEYING
PAGE 01 71 20 - 9
Spot data shall provide Northing, Easting, and Elevation.
2. Prior to approval of pipeline lay drawings and within 60 calendar days of starting pipe trench excavations, the CONTRACTOR shall conduct and submit to the GOVERNMENT an existing grade pre-construction survey along the centerline of the following pipelines to determine the subsidence that has occurred since August 2018.
a. 48"" RW on Drawing C-403
b. 24"" RW on Drawing C-404-2 and C-404-3
c. 18"" RW on Drawing C-407
The GOVERNMENT will then compare this data to the 2018 design to prepare design adjustments to pipeline invert elevations, if necessary. At a minimum, this survey shall consist of six spot elevations evenly spaced along the pipe centerline. Spot data shall provide Northing, Easting, and Elevation."
3.7 SURVEYS FOR EXISTING ROADS AT NEW SIPHON CROSSINGS
A. Prior to starting any work at each Tulare County road with a new siphon crossing, the CONTRACTOR shall conduct a roadway centerline survey of the existing road profiles for replacement. At 5-foot intervals, survey the existing road cross sections including edges of pavement and crown. The road survey shall be taken to approximately 200-feet beyond the limits of road replacement on each end of the road. Reconstructed roadway finished centerline profiles shall match existing road profiles established by this survey, using typical roadway cross slope, unless modifications are required by the GOVERNMENT. Roadway profile data shall be submitted to the CONTRACTING OFFICERS REPRESENTATIVE.
B. Existing road survey data files in the form of an excel spread sheet showing survey control, stationing and road centerline (crown) and edge of pavement coordinates and elevations at intervals required.
3.8 PHOTOGRAPHS AND DIGITAL VIDEO RECORDINGS
A. CONTRACTOR, as a minimum, shall document pre- and post-construction conditions by preparing video surveys of the following:
1. Roadways used to access the Site or haul materials and equipment to the Site.
2. Work areas along the canal, including actual work sites, materials processing and stockpiling areas, access corridors, disposal areas, and staging areas.
3. Any work completed by other contractors at the Site that will be connected to or otherwise affected by the WORK.
4. Driveways, sidewalks, and buildings which might be affected by the WORK.
B. Supplement video surveys with photographs as required to thoroughly document the original condition and location of existing features and facilities.
C. Video records shall be in a digital DVD format.
Attachment 2 Amendment No 0003 swolfert Polygon
FKC MIDDLE REACH CAPACITY CORRECTION PROJECT PHASE 1
SURVEYING
PAGE 01 71 20 - 10
3.9 TULARE COUNTY AERIAL PHOTOGRAPH REQUIREMENTS
A. The CONTRACTOR shall provide a minimum of 10 before and 20 after project (for each location that is permitted by the County – refer to Section 01 14 00 – Construction Constraints and Sequencing) aerial photographs in high definition (1080p). Coverage shall include detour routes. Aerial photography must be undertaken only when well-defined images can be obtained. Photography must not be undertaken when the ground is obscured by haze, snow, foliage, flooding conditions, or when clouds or cloud shadows would appear in the area of any one photograph. Images provided must capture various angles of the entire project, including approach roadways and channel/embankment improvements. Submit to the CONTRACTING OFFICERS REPRESENTATIVE for submittal to County the flight path, date of flight, length and minimum coverage of the route 10 days before the actual flight schedule.
END OF SECTION
Attachment 2 Amendment No 0003
File details come from the government source that posted it. Updated .