Downbound Barge Grain Movements (Tons)

The Mississippi River (north of St. Louis, MO) and its tributaries (e.g., the Arkansas River, Illinois River, Ohio River, etc.) make use of a series of locks and dams to bring traffic up and down the waterways. Grain generally flows south from the relatively production-rich areas of the Midwest to export ports in Louisiana and feed markets in the southeast.

This dataset provides weekly information on the amount (in tons), location, and commodity of barged grain transiting the following three major points: (1) the last lock on the Mississippi, Mississippi Locks 27 (called "Miss Locks 27" in the dataset), which captures downbound traffic from the Upper Mississippi and Missouri Rivers; (2) the last lock on the Ohio River, Olmsted Locks and Dam (called "Ohio Olmstead" in the dataset), which captures any downbound traffic on the Ohio and Tennessee Rivers; and (3) the last lock on the Arkansas River, Arkansas River Lock and Dam 1 (called "Ark Lock 1" in the dataset).

Ohio Olmsted locks replaced Ohio Locks 52 beginning in November 2018.

Commodities include "corn," "soybeans," "wheat," and "other" (oats, barley, sorghum, and rye).

Combined, these three locks give a sense of barge grain traffic (by commodity) on the Mississippi--since grain shipments heading south from the Upper Mississippi River, Illinois River, Ohio River, and Arkansas River are captured. Note, however, that this data does not include all grain barge movements on the Mississippi Rover System, as some grain originates on the Mississippi below the locking portion (south of St. Louis, MO). Grain traffic originating below Lock 27 on the Mississippi is about 10 to 30 percent of total downbound grain shipments, which varies year to year.

A similar dataset, "Upbound and Downbound Loaded and Empty Barge Movements (Count)," contains information on the count of grain barges moving down the locking system (https://agtransport.usda.gov/d/w6ip-grsn) versus this dataset that shows tonnages.

Data is collected weekly from the U.S. Army Corps of Engineers' Lock Performance Monitoring System.

密西西比河（位于密苏里州圣路易斯以北）及其支流（例如，阿肯色河、伊利诺伊河、俄亥俄河等）利用一系列船闸和堤坝，以确保航道上的运输畅通。谷物通常从相对丰产的北美中部地区向南流动，运往路易斯安那州的出口港，并供应东南部的饲料市场。本数据集提供了每周关于驳船谷物通过以下三个主要点的数量（以吨计）、位置和商品信息：（1）密西西比河上的最后一道船闸，密西西比河船闸27（数据集中称为“Miss Locks 27”），它捕捉来自上游密西西比河和密苏里河的下行交通；（2）俄亥俄河上的最后一道船闸，奥姆斯特德船闸和堤坝（数据集中称为“Ohio Olmstead”），它捕捉俄亥俄河和田纳西河上的任何下行交通；（3）阿肯色河上的最后一道船闸，阿肯色河船闸和堤坝1（数据集中称为“Ark Lock 1”）。自2018年11月起，俄亥俄奥姆斯特德船闸取代了俄亥俄船闸52。商品包括“玉米”、“大豆”、“小麦”和“其他”（大麦、燕麦、高粱和黑麦）。这三个船闸共同展现了密西西比河上的驳船谷物流量（按商品分类）——因为来自上游密西西比河、伊利诺伊河、俄亥俄河和阿肯色河向南运输的谷物都包含在内。然而，请注意，这些数据并不包括密西西比河航道系统中所有谷物驳船的移动，因为部分谷物源自密西西比河船闸部分（圣路易斯以南）。密西西比河27号船闸以下的原谷物运输量约占总下行谷物运输量的10至30%，这一比例每年都有所变化。类似的另一个数据集“上行和下行装载和空驳船移动数量（计数）”提供了关于通过船闸系统移动的谷物驳船数量的信息（https://agtransport.usda.gov/d/w6ip-grsn），而本数据集则展示了吨位。数据由美国陆军工程兵团的船闸性能监控系统每周收集。