1. Summary of drainage for the United States: Jan. 1, 1940, 1930, and 1920
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2. Area of enterprises, by size: Jan. 1, 1940, 1930, and 1920
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3. Land and capital invested, by character of enterprise, Jan. 1, 1940
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4. Land and capital invested, by type of drainage: Jan. 1, 1940, 1930, and 1920
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5. Pumping plants and land served, by kind of power: Jan. 1, 1940, 1930, and 1920
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6. Pumping plants and land served, by kind of pump: Jan. 1, 1940 and 1930
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7. Land, capital invested, and area delinquent in drainage taxes, by arrearage in payment of obligations: Jan. 1, 1940 and 1930
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8. Land, capital invested, indebtedness, arrearage in payment of bonds, reduction of debt by refinancing, and acreage delinquent, 1940; drainage taxes collected in 1939; by indebtedness and arrearage, Jan. 1, 1940
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9. Land, capital invested, by principal purpose of drainage, Jan. 1, 1940
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10. Land, capital invested, by date of organization, Jan. 1, 1940
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11. Drainage condition, development, and use of land in enterprises, by date of organization, 1939
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12. Cost of operation and maintenance, by type of drainage, 1939
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13. Land and capital invested, by method of maintenance and by whether maintenance is systematic, Jan, 1, 1940
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14. Land, capital invested, and drainage works, by ownership of power equipment for maintenance, 1940
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15. Land, capital invested, and drainage works, by Federal agency givig aid in maintenance, 1940
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16. Land, capital invested, and drainage works, by flood protection from levees of an outside agency, 1940
17. Land in drainage enterprises classified by condition and by use, 1940, 1930, and 1020; and by kind of works, 1940
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18. Drainage enterprises - Works and capital invested, 1940, 1930, and 1920; and maintenance and operation, and financial condition, 1939
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19. Reports, area assessed, and land included, by size based on intercounty enterprises divided on county lines, by divisions and States: 1940, 1930, and 1920
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20. Reports, area assessed by size based on intercounty enterprises not divided on county lines, enterprises, and land included, by divisions and States, 1940
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21. Land in enterprises and capital invested by character of enterprise, by divisons and States, 1940
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22. Land in irrigation enterprises included in Census of Drainage with portions to be served by the drainage works, by States, 1940
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23. Land and capital by completion of works: 1940, 1930, and 1920
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24. Land in enterprises and capital invested, by completion of works, by divisions and States, 1940
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25. Land in enterprises, capital invested, and cost per acre, by type of drainage, by divisions and States, 1940
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26. Land in enterprises, length of drains, and acres drained per mile of drain, by type of drain, by divisions and States, 1940
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27. Land served by drainage pumps, capacities of engines or motors and of pumps, average lift of water, and plant ratio, by divisions and States, 1940
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28. Land in enterprises, capital invested, and area delinquent in drainage taxes, by arrearage in payment of obligations, by divisions and States, 1940
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29. Land unfit for any crop for lack of drainage and idle land, in enterprises, by arrearage in payment of obligarions, by divisions and States, 1940
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30. Land in enterprises, area assessed, and capital invested, by date of organization, by divisions and States, 1940
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31. Enterprises reporting cost of maintenance and operation, and cost per acre, by type of drainage, by divisions and States, 1940
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32. Land in enterprises and capital invested, by method of maintenance and whether maintenance is systematic, by divisions and States, 1940
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33. Land, capital invested, and drainage works, for all enterprises, for enterprises owning power equipment for maintenance, and for enterprises protected by levees of outside agencies, by States, 1940
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34. Land, capital invested, and drainage works of enterprises receiving Federal aid in maintenance, by agency giving the aid, by States, 1940
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35. Employment and pay roll of enterprises, by character of enterprise, by States, 1939
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36. Precipitaion by months for the year 1939, with departures from normal, for the 38 drainage States