SOURCES SOUGHT
Z -- SHORELINE PROTECTION, FOURTH CLIFF, SCITUATE, RHODE ISLAND
- Notice Date
- 9/21/2005
- Notice Type
- Sources Sought
- NAICS
- 237990
— Other Heavy and Civil Engineering Construction
- Contracting Office
- US Army Engineer District, New England, 696 Virginia Road, Concord, MA 01742-2751
- ZIP Code
- 01742-2751
- Solicitation Number
- W912WJ-05-X-0004
- Response Due
- 10/5/2005
- Archive Date
- 12/4/2005
- Small Business Set-Aside
- N/A
- Description
- The United States Air Force (USAF) Fourth Cliff Recreational Facility is located on the northern tip of Fourth Cliff in Scituate, Massachusetts, in the village of Humarock. The Facility is bounded by private residents to the south, the Atlantic Ocea n to the east and the mouth of the North and South Rivers to the north and west. Fourth Cliff is a drumlin comprised of glacial till, the slopes of which have experienced significant erosion for many years due to drainage of overland flow off the top of t he Cliff and also from wave action along the toe of the cliff during severe storms. It has been estimated that the average erosion rate of Fourth Cliff has been 1-foot per year. Left unprotected, the slopes will continue to slough and erode endangering t he Facility and Historic structures located on the top of the cliff. The most recent study of the Fourth Cliff area was performed by Ocean and Coastal Consultants (OCC) and the Michael Baker Corporation in 2001. This study identified the erosion of the cliff was due to rain runoff over the top edge of the cliff and wave ac tion during a storm surge. The study evaluated several different shoreline stabilization alternatives for both the beach and the cliff. Stabilization of the beach by placing sand on the beach was the first alternative evaluated. Sources for the sand inc luded either utilizing dredge material from the North and South Rivers or by the placement of seabed scour mats anchored to the seabed floor just off shore. Stabilization of the coastal bank was also evaluated. Alternatives included no action, providing a sacrificial dune at the base of the cliff, reducing the slope of the cliff to a 1V:2H and providing drainage systems to divert water runoff from the slope areas, establishing a vegetative cover on the slope, and an armor stone toe protection. The main de sign requirement is that the selected alternative would protect Fourth Cliff from a 100-year storm event. As such, all the alternatives evaluated, except for armor stone, do not provide the protection required to withstand a 100- year storm event. The re commeded solution was a combination of placing armor stone along the toe of the cliff, vegetating the upper slope, and providing a drainage system to divert runoff off the slope. A conceptual section which included these three components was developed. Additionally, the size of the armor stone was also calculated to range from 2.5 to 4.3 tons. The United State Army Corps of Engineers (USACE), New England District, has been tasked by the USAF to prepare and execute a Design-Build Contract for a shoreline protection project at Fourth Cliff based on the findings of the OCC 2001 report. Using the c onceptual design provided by OCC, USACE updated the cross section to conform to the design requirements set by USAF and current design standards of the USACE. The contract will encompass the final design, layout, and construction of an armor stone toe wit h a vegetated upper slope. The protection will tie into the existing slope at the property line on the south side (ocean side) and extend around the north point approximately 1200 feet where it will taper into the existing beach. The stone revetment is d esigned to withstand a 100-year storm and includes an 8-foot thick layer of 5.3-ton armor stone extending from El 20ft-NGVD to El -4 ft-NGVD on a 1V:1.5H slope. The slope from El 20 to the top of the cliff will be protected with a geosynthetic and vegetat ed to protect the upper slope from surface runoff erosion and sloughing. The limiting factors driving the layout of the designed cross section include minimizing the impact to the intertidal zone and minimizing the cutback of the upper slope. Material for construction of the revetment will be either barged to the site and or brought in by truck. The staging area for materials will be on the South River (west) side of the cliff on the beach. Placement of the armor stone and bedding layers will require excavation of the existing beach. Excavation and construction of the armor stone will be done in stages to limit open excavation areas for long periods of time and to protect sections of the project already built. Material fr om the required excavations will be stockpiled and utilized to the extent possible as backfill material above the toe of the armor stone and also for the sacrificial berm. This acquisition will be issued on or about 10/15/2005 as a Request for Proposal that will be evaluated utilizing a Best Value Analysis. It is anticipated that award will be made by March 2006. The estimated range is $5,000,000 - $10,000,000. Firms that are interested in competing for this project as Prime Contractors are requested to submit a letter of interest indicating whether their firm is a Large Business (LB), Small Business (SB), Small Disadvantaged Business (SDB), HUBZone Small Business (HSB), S ervice-Disabled Veteran Owned Small Business (SDVSB), SBA 8(a)small Business (8(a)). Letters of interest should be sent to the attention of Rachael Raposa at U. S. Army Engineer District, New England, 696 Virginia Road, Concord, MA 01742-2751, by fax at 9 78-318-8207, or by email to Rachael.Raposa @usace.army.mil no later than 10/05/2005.
- Place of Performance
- Address: US Army Engineer District, New England 696 Virginia Road, Concord MA
- Zip Code: 01742-2751
- Country: US
- Zip Code: 01742-2751
- Record
- SN00900513-W 20050923/050921212141 (fbodaily.com)
- Source
-
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