SPECIAL NOTICE
Y -- East Branch Cutoff Wall Presentation Invitation
- Notice Date
- 1/31/2012
- Notice Type
- Special Notice
- NAICS
- 237990
— Other Heavy and Civil Engineering Construction
- Contracting Office
- USACE District, Pittsburgh, 1000 Liberty Avenue, W.S. Moorhead Federal Building, 22nd Floor, Pittsburgh, PA 15222-4186
- ZIP Code
- 15222-4186
- Solicitation Number
- EASTBRANCHCUTOFFWALL
- Archive Date
- 4/30/2012
- Point of Contact
- Jeffrey Zbezinski, 412-395-7228
- E-Mail Address
-
USACE District, Pittsburgh
(jeffrey.j.zbezinski@usace.army.mil)
- Small Business Set-Aside
- N/A
- Description
- The purpose of this announcement is to seek parties interested in presenting their capabilities for construction of deep cutoff walls to the U.S. Army Corps of Engineers, Pittsburgh District, for the project at East Branch Dam, Wilcox, PA. THIS IS NOT A SOLICITATION FOR PROPOSALS AND NO CONTRACT WILL BE AWARDED FROM THIS ANNOUNCEMENT. Only Contractors that have relevant experience constructing cutoff walls (to the depths and in the conditions described below) using hydro-cutter, top drive drill, or similar equipment may make presentations to the Pittsburgh District. Due to the projected scope of cutoff wall construction, an interested offeror shall have a contract bonding capacity of $100 to $250 million. These requirements do not preclude other Contractors from submitting proposals when the solicitation for cutoff wall construction is released. East Branch Dam is located on the East Branch Clarion River, 7.3 miles upstream of its confluence with the West Branch Clarion River at Johnsonburg, Pennsylvania. The primary component of the construction consists of a concrete cutoff wall constructed through the dam and abutments to an anticipated maximum depth of 260 feet, including an anticipated maximum depth of 170 feet into bedrock. The wall element thickness will be sufficient to achieve a minimum continuous thickness of 18 inches. East Branch dam is a compacted earth embankment composed of silt, sand, gravel and contains cobbles and some boulders. The dam underwent a serious internal erosion event in 1957. The subsequent repair was incomplete, leaving the dam especially susceptible to additional internal erosion events. The dam is fragile in the area of this repair as well as generally susceptible to hydrofracture. Pretreatment by soil-cement mixing will be necessary in the particularly fragile portion of the embankment associated with the 1957 grouted void repair to lessen the risk that cutoff wall construction by the slurry-filled panel method will further damage the dam. The maximum depth of soil mixing is approximately 150 feet. Based on the best currently available information, the foundation soils have the same general composition as the embankment materials, although they contain more boulders. Attachment 1 includes photographs of typical foundation soils. Zones of more permeable and water-bearing gravels are present in the foundation soils. Bedrock is composed primarily of sandstone and shale, although zones of siltstone, limestone and conglomerate are present less frequently. Unconfined compressive strengths in excess of 20,000 psi are not uncommon within the bedrock. Typical bedrock strength properties obtained during recent explorations at East Branch are summarized in Attachment 2. The bedrock contains sufficiently permeable zones that pre-grouting will be necessary to permit cutoff wall construction without rapid loss of slurry. Bedrock is fractured in select zones, particularly near the top of rock, with observed Lugeon Values ranging from zero to in excess of 200 (i.e. water pressure could not be developed at the pumped flowrate). Two Optical Televiwer Images from a recent exploration, including Lugeon testing results and water losses observed during coring, are shown in Attachment 3. These images indicate typical bedrock conditions, including the the variability of bedrock conditions between the left abutment and valley center. Interested Contractors shall respond to this request no later than February 17, 2012. All interested Contractors must be registered in CCR to be eligible for award of Government contracts. To reserve a time and date to make a presentation, submit a one page corporate fact sheet to Jeff Zbezinski, Contract Specialist at the following e-mail address: jeffrey.j.zbezinski@usace.army.mil. This fact sheet will be used to verify that Contractors meet the construction and bonding capabilities described previously. Presentations will be entertained at the Pittsburgh District Offices, US Army Corps of Engineers, 1000 Liberty Avenue, Pittsburgh, PA 15222 from March 19-23, 2012 between the hours of 9:00 am and 3:00 pm. Presentations shall be limited to a window of two (2)-hours, to include follow-up questions. The government will provide a projector. Interested offerors shall provide an electronic copy of their presentation to the Pittsburgh District on a CD or DVD ROM at the presentation session. Contractors shall also provide 10 hard copies of their presentations to the Pittsburgh District. After all the presentations are conducted, a complete list of prospective offerors that made presentations will be posted to this announcement, along with questions and responses provided by the Government. Information provided by a potential offeror will not be disclosed if doing so would reveal the potential offeror's confidential business strategy. Contracting Office Address: USACE District, Pittsburgh, 1000 Liberty Avenue, W.S. Moorhead Federal Building, 22nd Floor, Pittsburgh, PA 15222-4186
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/USA/COE/DACA59/EASTBRANCHCUTOFFWALL/listing.html)
- Record
- SN02664582-W 20120202/120131234814-3af03bc57a8a829493fcbfb03c8c8cb5 (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
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