Coastal Erosion Protection

The general objectives of this Performance Work Statement (PWS) are to: Construct approximately 5 miles of coastal erosion protection comprised of a revetment, armored berm, and raised armored road along the coast of Utqiagvik (Barrow) Alaska. The revetment section (approximately 0.75 miles) would be supported by a coastal bluff and comprised of a layered system of; filter fabric, gravel, core rock, B rock, and 2.7-ton armor stone. This section would generally be constructed to a height of 20ft to 18ft above MLLW and require approximately 55,000 cy of armor stone along with approximately 60,000 cy of gravel, core, and B rock. The armored berm section (approximately 0.5 miles) would be constructed with a gravel and core rock foundation, B rock berm, and seaward armor stone with a splash apron. The crest would be approximately 16 ft above MLLW and approximately 34,000 cy of 2.7-ton armor stone, 33,000 cy of B rock, and 16,000 cy of core and gravel would be required. The raised and armored road section (approximately 3.5 miles) would require raising an existing road surface to approximately 16 ft above MLLW (approximately 8 above existing grade) and armoring the seaward side. A gravel and core rock foundation with B rock and 2.7-ton armor shell would be used. This section would require approximately 100,000 cy of gravel and Core rock, 130,000 cy of B rock, and 150,000 cy of Armor stone. Intersecting streets would be modified to accommodate new height. Major tasks would include sourcing of rock material, transportation of rock material to Utqiagvik, Alaska, and placement as described. Removal of existing temporary shore protection would be required. In locations to be determined, installation of thermal-siphons may be required for stability. At least two water control structures would be constructed to prevent impounding of water landward of the shore protection.

Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Storm Drainage Utilities, Ponds and Reservoirs.
Division 35 -	Waterway and Marine Construction, Shoreline Protection, Waterway Construction and Equipment.