Dams and levees help to maintain navigability on inland waterways. Breakwaters and jetties are vital to navigability on coastal waterways and at ports. Dredging is another important category of expenditures, accounting for 134 million dollars of state and local expenditures in 2001.
|Public Expenditures on Water Transportation and Development Construction (state and local only)||May-02||Jun-02|
|Docks and marinas (millions)||1,548||1,393|
|Percent change from previous month||11.13||-10.01|
|Dams, levees, breakwaters, and jetties (millions)||844||1,083|
|Percent change from previous month||-19.23||28.32|
NOTES: Docks and marinas are a component of the Water transportation category in the indicator "Public Expenditures on Nonroadway Transportation Construction."
Dam/levee and breakwater/jetty are the two monthly published components of the Conservation and Development category from the Census Bureau data. Dam/levee includes non-power dams, dikes, locks, and lock gates. Breakwater/jetty includes bulkheads, erosion control, retaining walls, and other similar structures. In addition, annual estimates for nonirrigation related dredging are published.
Information on the reliability of estimates is available at: http://www.census.gov/pub/const/AppendixC.pdf.
SOURCE: U.S. Department of Commerce, Bureau of the Census; August 1, 2002; available at: http://www.census.gov/pub/const/C30/newtc.html.