9419 ‎(2)‎

• UCREFRP Catalog Number: 9419
• Author: Jones Construction.
• Title: Completion Report ofr Redlands Passageway.
• USFW Year: 1995.
• USFW - Doc Type: \
• Copyright Material: NO

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On November 28, 1995, the contractor began excavation for the forebay structure using a Drott
40 trackhoe and a 175B Clark front end loader. The coffer dam developed cracks and the
contractor encountered unsuitable foundation material. The contractor decided to push in drill
pipe with the excavator and span between the pipe with expandable metal. This approach was
never used, because the contractor could only push the pipe down to a 2 or 3-foot depth. The
contractor decided to get a subcontractor to drive the drill pipe to the depth needed.
Reference Photo No. CN-1745-417-6NA
December 1, 1995, the contractor's subcontractor began driving 4-inch inside diameter drill
pipe, 8 to 15 feet in length, spaced at 6-foot outside centers, at upstream coffer dam. A total of
22 pipe were driven. 3/8"X5'X6' sheet steel was used for shoring behind the steel pipe, and a
total of 32 linear feet of sheeting was installed. Shoring was completed on December 2, 1995.
Reference Photo No. CN-1745-417-8NA
December 3, 1995, contractor resumed excavation by removing wet saturated material at
subgrade in forebay wingwall footer area.
On December 6, 1995, the contractor began additional excavation at forebay structure. The
equipment used was a Case 40 trackhoe, 175 B Clark front end loader, and one 12 cubic yard
end dump truck. Unsuitable materials were hauled away and placed in the waste area.
Unsuitable materials was replaced with 12-inch cobble, with gravel fill placed on top of the
cobble.
Reference Photo Nos. CN-1745-417-9NA and CN-1745-417-14NA
December 8, 1995, carpenters set outside footer forms for the retaining wall at the forebay
structure. The contractor continued to work on additional excavation and stabilization of
subgrade for the forebay floor slab. Excavation for forebay structure station 0+00 to 0+52
completed except for 42-inch diameter RCP inlet.
December 5, 1995, the contractor and Bureau personnel met onsite to discuss procedures for the
protection of Redland's abutment and existing apron at the entrance structure. The contractor
proposed piling installation procedures, at that time with everyones concurences.
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