SOUTH _GATE_Squaw Creek field investigation 9_17_2019.pdf
PDF 273 KB Posted
- Attached to
- 127EAW21R0039 - South Gate Bridge Project
- Solicitation number
- 127EAW21R0039
About this file
This document contains details for federal contract solicitation 127EAW21R0039 for the South Gate Bridge Project. The solicitation is for construction services between $100,000 to $250,000 and has been set aside for total small business. The solicitation is issued by the Department of Agriculture Forest Service Pacific Southwest Region. Offerors are required to visit the project site and submit any requests for information to the contracting officer by June 30th, 2021. The project involves repair and replacement of an existing culvert and bridge located on the Shasta-Trinity National Forest in California. Site investigation notes and drawings are provided documenting existing conditions including subsurface exploration, existing infrastructure locations and dimensions, and recommendations.
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Other files
| File | Type | Posted |
|---|---|---|
| RFI Official Responses - 1.pdf | ||
| 127EAW21R0039 - A00003.pdf | ||
| 127EAW21R0039 - A00002.pdf | ||
| 127EAW21R0039 - A00001.pdf | ||
| 127EAW21R0039.pdf | ||
| 1. South Gate Bridge Drawings & Plans.pdf | ||
| 2. FS Supplemental Specifications.pdf | ||
| 5. RFI Form.docx | DOCX document | |
| 4. Davis-Bacon Act WD # CA20210007.pdf | ||
| 3. Fire Plan.pdf |
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Text version
~24 ft
DCP 1
DCP 2
DCP 1
DCP 2
PIT 1
PIT 2
~9 ft from creek channel
~9 ft from creek channel
Depth Blows
4 - 8 in 3 8 - 12 in 2 12 - 16 in 2 16 - 20 in 1 20 - 24 in 1
DCP 2
Depth Blows
4 - 8 in 7 8 - 12 in 6 12 - 16 in 6 16 - 20 in 6 20 - 24 in 5
DCP 1
Depth
0 - 6 ft
PIT 2
Description
Large rock with soil at depth.
Difficult to excavate deeper than 6 feet.
Depth
0 - 5 ft
5 ft
PIT 1
Description
Large cobble and rock
Could not excavate past five feet with backhoe.
Extremely hard
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AS NOTED
9/18/2019
RO DESIGN TEAM
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SHASTA TRINITY NF
AutoCAD SHX Text ~33 Feet
AutoCAD SHX Text ~32 ft
AutoCAD SHX Text Road
AutoCAD SHX Text ~4 Feet
AutoCAD SHX Text ~3 to 4 Feet
AutoCAD SHX Text ~3 deg
AutoCAD SHX Text ~24 ft
AutoCAD SHX Text Upstream
AutoCAD SHX Text ~32 ft
AutoCAD SHX Text ~7.5 Feet
AutoCAD SHX Text Downstream
AutoCAD SHX Text ~18 Feet
AutoCAD SHX Text
41.27537 -122.11578
AutoCAD SHX Text ~4 Feet
AutoCAD SHX Text Minimal cover over upstream inlet. Large boulders around inlet from excavation to place culvert.
AutoCAD SHX Text ~30 Ft to road centerline
AutoCAD SHX Text C
AutoCAD SHX Text L
AutoCAD SHX Text ~18 Ft to road centerline
AutoCAD SHX Text Culvert
AutoCAD SHX Text ~5 Feet minimum.
AutoCAD SHX Text Downstream
AutoCAD SHX Text ~32 ft bank to bank downstream
AutoCAD SHX Text It was assumed erosion created the observed fish barrier on the downstream side of the existing culvert. Erosion likely played a role to some degree. However, after excavating the pits it appears the barrier may have existed after the culvert placement since large rock and an extremely hard layer was encountered in pits excavated at the site. Large rock, in excess of 3 feet in diameter, can be seen on the upstream side of the culvert. The rocks appear to be native and were removed during the excavation for the culvert. The site investigation, which occurred on 9/18/2019, was halted at a depth of 5 feet in Pit 1 where refusal was encountered. The material in Pit 5 appeared to be bedrock or an extremely over consolidated, cemented, volcanic flow. Excavation was halted at a depth of 6 feet in Pit 2 due to difficult digging and large rock.
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