| 摘要 |
A culvert block inhibits beavers from carrying dam forming debris downstream through the block. The block comprises a frame formed by end supports and upper and lower cross bars. A plurality of vertical rods are located across the frame supported by the cross bars. The rods are separated from one another sufficiently to permit water without debris to pass between the rods. The rods are individually vertically movable to and away from a debris blocking position in the frame and each rod has an upper end portion extending above the upper cross bar to form a rod grip for raising and lowering the rods relative to the frame.
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