2.2.5 Mississippi River Interaction One of the unique features of Crosby Lake is that the lake resides in the floodplain of the Mississippi River (Figure 2-6). Because Crosby Lake is in the floodplain of the Mississippi River, the two water bodies will exchange water under high flow conditions potentially exchanging nutrients and biological organisms. This interaction must be considered when developing management actions for Crosby Lake. A review of Mississippi River flow and stage data was conducted to develop an understanding of the magnitude and frequency of flood water interaction with Crosby Lake (Appendix B). Using 2-foot contours provided by the City of St. Paul, it appears that the river and lake are “connected� at approximately elevation 697. The connection occurs at the southeast corner of the lake where there is a break in the 698 contour (Figure 2-7). There appears to be a flow path from this point and southeast to the river.
Lake Connection to River
Figure 2-7. Crosby Lake Connection to the Mississippi River
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