Showing posts with label beach nourishment. Show all posts
Showing posts with label beach nourishment. Show all posts

Thursday, December 14, 2017

On the Boardwalk: Coney Island 1999

Coney Island has been the summer beach playground for New Yorkers for over a century. America’s first large engineered beach fill was the boardwalk and recreational beach on Coney Island in 1922 - 1923 (Farley 1923). With the completion of the project, immigrants and factory workers could escape the sweatshops of the sweltering city and enjoy a (crowded) Sunday at the beach for only a nickel subway ride (Stanton 1999). "The Improvement helped convert nearly 2 miles of shoreline characterized by ramshackle development and narrow to non-existent beaches from which the general public was excluded, to a world famous resort that was accessible to all for no more than the cost of a subway fare." (Dornhelm 2012). Coney Island is part of the borough of Brooklyn.

In the photograph above, the odd mushroom-shaped frame was once a parachute jump, where guests would hop off and float to the ground. The boardwalk has been rebuilt many times.
Coney Island beach pumping in 1922.
Coney Island 1941. From the archives of the Beach Erosion Board, now at the Coastal and Hydraulics Laboratory, US Army Corps of Engineers.
Parachute jump,1941 or 1942 (from Library of Congress, intermediary roll film) fsa 8b00812 http://hdl.loc.gov/loc.pnp/fsa.8b00812)
This was the scene at Coney Island on a summer day in 1941 at the eve of World War II. The subway was still a nickel then.
Despite being refurbished and "urban renewed," there are still old structures and remnants of Coney Island's exuberant past.
 There is still an amusement park, but it is small compared to the ones in the 1950s.
Notice the rocket architecture, likely something from the Sputnik era when rockets were modern and trendy.
The famous hotdog stands are still there and thriving. The fries look great, but I may pass on the mystery-meat hotdogs.
This stone structure is known as a terminal groin and was built by the US Army Corps of Engineers at W 37th Street. The reason is convoluted. The community at the west tip of Coney Island is known as Seagate and is closed to the public. By law, beaches which are nourished with Federal funds must be accessible to the general public. Therefore, when the Corps of Engineers performed beach nourishments on Coney Island, the sand had to be restricted to the part of the beach east of W 37th Street (to the right in the photograph).
View across Gravesend Bay to the Verrazano Narrows Bridge from Seagate, Coney Island.
Along this shore, longshore transport is from east to west. Thanks to numerous beach fill projects, sand has filled the project to the seaward end of the 37th Street terminal groin and moves around the tip and to the shore at Seagate. The sand moves around the west end of Coney, past the Coney Island Lighthouse, and into Coney Island Creek. Some residents complained that the beach on the north side of Seagate was too wide (after decades of complaining they were suffering from beach erosion).
Rockaway Beach also has a wide boardwalk and the beach has also been nourished many times to provide storm and flood protection as well as recreation benefits.

I took these photographs with a Leica M3 rangefinder camera with 35mm Summicron-RF (the superb 8-element) and 50mm Summicron (type 4) lenses on Kodak Kodachrome 25 film. I scanned the frames on a Plustek 7600i film scanner using Silverfast Ai software.


References


Dornhelm, R.B., 2012. The Coney Island Public Beach and Boardwalk Improvement of 1923. Fourth Annual Northeast Shore and Beach Preservation Association Conference (NSBPA), October 24-26, 2001 | Stevens Institute of Technology, Hoboken, NJ.

Farley, P. P. 1923. Coney Island public beach and boardwalk improvement. The Municipal Engineers
Journal, Vol. 9, Paper 136, pp 136.1-136.32.

Stanton, J. 1999. “Coney Island - Nickel Empire (1920's-1930's).” (https://www.westland.net/coneyisland/articles/nickelempire.htm, accessed 09/27/2017)

Update, Jan. 19, 2018:  A friend sent me this interesting picture of Coney Island during Hurricane Donna in 1960. The photograph was on Facebook in the "Old Images of Brooklyn" group. Original source is unknown. It looks like it might have been a 4×5 original, so possibly from a press photographer.

Saturday, June 23, 2012

Condemned Beach Houses at South Nags Head, North Carolina

Long-term readers may remember my 2010 article on the group of condemned beach houses at South Nags Head, North Carolina. In 2010, the surf zone was literally under the piles that supported the houses, and everyone assumed they would soon collapse. The City had condemned them because of exposed septic tanks.
To everyone's surprise, the houses are still standing. And now they are perched on a beautiful wide beach, courtesy of the recently-completed beach fill. I do not understand all the details, but the owners are suing the city to be allowed to re-access their properties so that they can fix them up and un-condemn them. Only in America....

The beach nourishment project was conducted between May 24 and October 27 of 2011. Hurricane Irene on August 27 interrupted the work. For safety, the dredging company moved their equipment to Norfolk, Virginia. Storm waves caused extensive adjustment of the nourished beach profile, but no loss of sand within the project area (Kana et al., 2012).  Adjustment means sand moved deeper on the profile and morphologic features like sand bars formed, but the overall volume of sand remained within the project boundaries. Because of delays in securing federal funds for a comprehensive Dare County beach nourishment project, the Town of Nags Head elected to fund an "interim" beach nourishment locally. Total sand placement amounted to 4,600,000 cubic yards. This may be the largest locally-funded beach nourishment project completed in the United States.
Some notes on beach projects:

When confronted with severe beach erosion, local, county, and Federal authorities can choose four broad classes of technical and management alternatives (Coastal Engineering Manual, 2008, Part V.3):
  1. No action
  2. Controlled and strategic retreat
  3. Hold the line and refuse to retreat
  4. Replicate or augment the natural sediment supply to the region with artificial beach nourishment.
1. The first option is often followed on undeveloped coasts, such as in National Seashores. But even the National Park Service is now selecting to add sand to some of their eroding parks.

2. The second option, strategic retreat, is politically difficult because property owners lobby their politicians to "do something" to protect their valuable beach-front property. And, towns and municipalities derive major tax revenue from beach property, whose owners are often wealthy and often only occupy the premises temporarily.

Nevertheless, in the face of rising sea level, many communities are confronting the previously unthinkable fact that some areas will be impossible to protect and maintain. Also, taxpayers from inland areas complain that wealthy beach residents voluntarily purchased their properties in hazardous geographic locations. Why should general taxpayer revenues pay for storm recovery to let wealthy people live at the beach and profit from the appreciation of their houses (i.e., capitalism for the profit, but socialize the risk)?

3. The third option, "hold the line," was popular in the early-mid 20th century. It consists of building massive sea walls or shore-front stone revetments to mark the permanent position of the shoreline. One side is ocean, the other is city. The 1900-vintage Galveston Seawall is an example of this type of project. Seawalls have many disadvantages. They:
  • Are difficult to design and expensive to construct.
  • Have aesthetic issues
  • Require maintenance and are vulnerable to major storms.
  • Are environmentally troublesome (there is little habitat in front of a concrete wall).
  • Offer only limited recreational opportunities.
Because of cost, environmental, and permitting issues, we will probably not see new major seawall construction in the United States.

4. The fourth option is more and more popular around the world. A beach nourishment project has as its intent to replace sand onto a shoreface from where sand was lost over the years due to natural and man-made reasons. Most beaches around the United States are far from "natural" any more, and most are sediment-deficient because of various man-made reasons. These include:
  • Dam-construction on rivers
  • Sediment trapping by jetties at inlets
  • Sand lost offshore due to harbor and channel dredging, followed by deep-water disposal.
  • Sand-mining from beaches
  • Loss of sand sources due to paving and urbanization
  • Armoring of bluffs and banks
The concept of a beach fill is to pump sand onto the beach from an offshore deposit or bring in sand using trucks. The South Nags Head project is an example of hydraulic pumping from an offshore deposit.

Many critics state that a beach fill is fundamentally a failure because eventually the sand will wash away. Of course it will - that is the function of a beach! The beach serves as a flexible and sacrificial buffer to dissipate storm wave energy and protect upland development. Regular maintenance is one of the costs of living at the beach. The cost of periodic renourishment is low compared to the economic activity generated by wide recreation beaches. Think of the alternative: who comes to the coast to look at a seawall?
This is a view of the barrier island at Duck, about 25 miles north of South Nags Head. Unlike Nags Head, Duck has been relatively stable and has not suffered net beach erosion over the last half century. In this view, the Atlantic ocean is to the left and Currituck Sound to the right. The undeveloped land in the foreground belongs to the U.S. Army Corps of Engineers and is used for their Field Research Facility. It was originally a bombing range in World War II and reverted to the Corps of Engineers in the late 1960s. It is obvious where commercial property begins beyond the Army property. Much of the island has been so thickly developed, it is essentially urban.

On the Federal land, the first row of sand dunes is thickly vegetated. The frontal dune all along the Outer Banks was built by the Civilian Conservation Corps during the 1930s - another example that the beaches are not "natural." This is a photograph from the 43-m (120 ft) observation tower, which is used for experiments and continuous video imaging.
This is a view of the research pier.  Long-period swells are approaching almost perpendicular to the shore. This is the best view in Duck other than from an airplane!
The view north from the tower shows some palatial vacation "bungalows."
This photograph shows workers planting grass on a beach restoration project. The date and location were not recorded, but the scene is likely the Outer Banks. The National Park Service and other Federal agencies sponsored many dune and beach restoration during the late 1930s. These also served as work relief efforts during the Great Depression. Photograph from the Beach Erosion Board Archives, U.S. Army Corps of Engineers (from the Coastal Engineering Manual, Part I, Chapter 3).  For more information on dune construction, see Schroeder, Dolan, and Haden (1976).

References:

Coastal Engineering Manual. 2008. Shore Protection Projects, Part V, Chapter 3. Engineer Manual EM-1110-2-1100, US Army Corps of Engineers, Washington, DC (avail. online, http://publications.usace.army.mil/publications/eng-manuals/EM_1110-2-1100_vol/PartV/Part_V-Chap_3.pdf, accessed 22 June 2012).

Kana, T.W., Kaczkowski, H.L., Traynum, S.B., and McKee, P.A. 2012. Impact of Hurricane Irene during the Nags Head Beach Nourishment Project. Shore & Beach, Vol. 80, No. 2, pp. 6-18.

Schroeder, P.M., Dolan, R., and Hayden, B.P.  1976.  Barrier-dune construction on the Outer Banks of North Carolina.  Environmental Management, Vol. 1, No. 2, pp. 105-114.