SOURCES SOUGHT
C -- Request for Information-Cofferdam Stability at Chickamauga Lock
- Notice Date
- 4/21/2015
- Notice Type
- Sources Sought
- NAICS
- 237990
— Other Heavy and Civil Engineering Construction
- Contracting Office
- USACE District, Nashville, P.O. Box 1070, 801 Broad Street, Nashville, TN 37202-1070
- ZIP Code
- 37202-1070
- Solicitation Number
- W912P5-15-B-RFI2
- Response Due
- 5/4/2015
- Archive Date
- 6/20/2015
- Point of Contact
- Jamie Davies, 615-736-7921
- E-Mail Address
-
USACE District, Nashville
(jamie.davies@us.army.mil)
- Small Business Set-Aside
- N/A
- Description
- ***Please see the attached questionnaire*** Major features of the Cofferdam Stability contract include*: 1) Access by water. All work components will be on or inside the existing cofferdam located immediately downstream of the dam. The only access to provide equipment and materials to this worksite will be by water. A ramp dedicated to the contractor to provide land access to floating plant for this delivery is located within one eighth of a mile to the cofferdam and additional land area adjacent to the ramp will be available to the contractor. Flows out of Chickamauga Dam can impact water access during certain periods. 2) Grouting. Approximately 20,000 cubic feet of Portland cement grout is to be placed within some of the circular sheet pile cells that comprise a large portion of the cofferdam. Grout will also be placed within the spillway tie-in boxes. An onsite grout plant will be required with appropriate controls and instrumentation to maintain quality control requirements and is expected to be installed by the contractor on the top of the 50 foot diameter coffer cells or from a floating plant. 3) Dewatering. The contractor will be required to install a dewatering system to dewater the cofferdam and keep it dewatered after the grouting program is complete. 4) Secant Pile Wall. After dewatering, a 51 foot long secant pile wall will be constructed in the cofferdam interior. The concrete secant piles will be 2 feet in diameter with the secondary piles having the addition of reinforcing steel. The piles will range in length from 22 to 44 feet and will require drilling through the limestone bedrock. The piles will have a concrete cap beam anchored into the adjacent, existing concrete wall using #8 dowels. 5) Inclined Rock Anchors. Also within the cofferdam interior, the contractor will install 44 inclined rock anchors. These are 60 to 68 strand anchors with design capacities of 1900 to 2100 kips. They range in length from 66 to 102 feet, have bond lengths of 39 to 43 feet, and are inclined 40 degrees off of horizontal. 6) Exploratory Drilling. Within the cofferdam, 65 holes exploratory drill holes will be required, up to approximately 70 feet deep. 7) Instrumentation. Contractor will be required to operate and maintain an existing automated and manual government furnished instrumentation system and new instruments to be installed by the contractor on the cofferdam. Existing instruments include inclinometers, piezometers, alignment pins, pressure cells and survey markers. *These are subject to change.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/USA/COE/DACA62/W912P5-15-B-RFI2/listing.html)
- Place of Performance
- Address: USACE District, Nashville P.O. Box 1070, 801 Broadway Nashville TN
- Zip Code: 37202-1070
- Zip Code: 37202-1070
- Record
- SN03706403-W 20150423/150421235635-ae334d8e13d83e892e56bb379793fe1d (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
(may not be valid after Archive Date)
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