Pool 3 contour map

can someone help me locate a good contour map of pool 3? the ones i have found do not show a lot of detail with regards to the back water areas.

any help is greatly appreciated!

Are you looking for a paper map or electronic?
You can get the MN DNR guide here:
http://files.dnr.state.mn.us/education_safety/safety/boatwater/miss_river_guide.pdf
The best place for online detail that I know of is the Navionics web site:
https://webapp.navionics.com/