Reach H Levee Improvement Construction Project

UPDATE 6 Nov 2018.
I understand there were some technical difficulties downloading Attachment 02 Reach H Plans. I've double-checked that the file is good and re-uploaded. Please be patient when downloading as the file is 230MB.
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***FOR SUBCONTRACTOR OPPORTUNITIES ONLY***

In accordance with the solicitation process identified in Sources Sought Number W91238-18-S-1618, dated 13 April 2018, the following solicitation is posted for subcontractor opportunities only.

This solicitation is proceeding as a 100% Total Small Business Set Aside for those prequalified small business concerns identified on the Prequalified Sources List (PSL) dated 18 May 2018 and revised on 22 June 2018. Only those small business concerns identified on the PSL are eligible to submit a bid for this project.
Reach H Levee Improvement Construction Project:
The Natomas East Main Drainage Canal west levee requires cutoff wall improvements from the pumping station just upstream of Dry Creek downstream (south) to Arden-Garden Connector Bridge. The length of this reach is approximately 4.0 miles. The general improvements include improving the existing levee by fix in-place construction, and installation of a seepage cutoff wall with a depth of approximately 30-70 feet, and flattening the landside levee slope. There are two pump-stations which will require the discharge pipes to be raised. Installation of a landside maintenance road is also required. The cutoff wall construction may be performed by applying either the vertical chain trenching (also known as One Pass Trenching (OPT)) or open trench (conventional long-stick) method.
In accordance with the DFAR 236.204(ii), the magnitude disclosure of this construction project is between $25M and $100M. This proposed contract action will be conducted using FSC Code: Y1LC and NAICS: 237990..

The attached pre-solicitation notice is posted for subcontractor teaming opportunities only. Only prequalified prime contractors will be eligible to submit bids in response to a prospective Invitation for Bids per the Prequalification Procedures identified in Sources Sought Notice W91238-18-S-1618 dated 13 April 2018 - which will remain an active post on FBO.gov while the Prequalified Sources List is still active and valid..