-250-1000 dollars per foot for Sea Wall
-
-
The cost of each system varies wildly based on intent and design.
Additional Beach Defenses
-Torpedo-mines (vehicle tracking mines) (Mark 60 CAPTOR)
-20mm Phalanx
-40mm anti-aircraft guns (DARDO)
-57mm Bofors L/70 naval artillery gun
-Some 76mm guns
-155mm Howitzer Hydrogen Gas Guns
-Cruise missile
-Stinger missile
-Sea Sparrow missile
-Patriot Missile
Beach-Fill
In Miami: The 10 miles (16 km)–long shoreline fronting Miami Beach, Florida was replenished over the period 1976–1981. The project cost approximately $64,000,000 and revitalized the area's economy.
Australia: The Northern Gold Coast Beach Protection Strategy (NGCBPS) was an A$10 million investment. NGCBPS was implemented between 1992 and 1999 and the works were completed between 1999 and 2003. The project included dredging 3,500,000 cubic metres (4,600,000 cu yd) of compatible sand from the Gold Coast Broadwater and delivering it through a pipeline to nourish 5 kilometers (3.1 mi) of beach between Surfers Paradise and Main Beach. The new sand was stabilized by an artificial reef constructed at Narrowneck out of huge geotextile sand bags. The new reef was designed to improve wave conditions for surfing. A key monitoring program for the NGCBPS is the ARGUS coastal camera system.
Sea-wall costs
Most expensive Japanese Seawall: At least 43 percent of Japan's 29,751 km (18,486 mi)[33] coastline is lined with concrete seawalls or other structures designed to protect the country against high waves, typhoons or even tsunamis.[34] During the 2011 Tōhoku earthquake and tsunami, the seawalls in most areas were overwhelmed. In Kamaishi, 4-metre (13 ft) waves surmounted the seawall — the world's largest, erected a few years ago in the city's harbour at a depth of 63 m (207 ft), a length of 2 km (1.2 mi) and a cost of $1.5 billion — and eventually submerged the city center.
Medium price: 250-1000 dollars per foot (1.25 to 5.3 million dollars per mile)
Tetrapods: Their success saw Tetrapods become popular across the world, particularly in Japan where their manufacture and dispersal still create jobs and contracts for construction companies. It is estimated that nearly 50 percent of Japan's 35,000 kilometers (22,000 mi) coastline has been covered or somehow altered by Tetrapods and other forms of concrete.
Breakwater
1000-2000 dollars meter
https://www.businessinsider.com/how-big-is-the-us-coastline-2015-10
http://asbpa.org/the-cost-of-beach-retreat-vs-the-cost-of-beach-nourishment/
http://www.beachapedia.org/Beach_Fill
https://en.wikipedia.org/wiki/Beach_nourishment#Costs
http://www.beachapedia.org/Beach_Fill
https://en.wikipedia.org/wiki/Tetrapod_(structure)
https://www.thedrive.com/the-war-zone/25235/the-u-s-is-getting-back-into-naval-mine-warfare-with-new-sub-launched-and-air-dropped-types
https://www.thedrive.com/the-war-zone/23705/b-52-tested-2000lb-quickstrike-er-winged-standoff-naval-mines-during-valiant-shield
https://fas.org/man/dod-101/sys/ship/weaps/mk-67.htm
https://en.wikipedia.org/wiki/Mark_60_CAPTOR
