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<br />which will require water quality ponding measures to treat water prior to discharging to the
<br />lake.
<br />
<br />Subwatershed 14d: Valentine Lake
<br />
<br />Policies:
<br />
<br />A.3, B.1, B.2, B.3, B.4, B.5, C.l, C.2, C.3, C.4, C.5, E.1, E.2, E.3, E.5, and F
<br />
<br />Valentine Lake receives runoff from a 2.4 sq mi area which includes Highways 694, 51, and
<br />
<br />
<br />10. Runoff rate control will be required due to the high density of development occurring in
<br />
<br />
<br />this subwatershed. The lake receives significant amounts of untreated runoff from the
<br />
<br />
<br />County Ditch 12 system although the ditch itself has been stabilized as part of the Long Lake
<br />
<br />
<br />Chain of Lakes program. Numerous smaller ponds have been established within the
<br />
<br />
<br />Highway 51/694 right-of-way and the Land O'Lakes corporate headquarters. Valentine Lake
<br />
<br />
<br />is monitored by the Ramsey County Department of Public Works and will be the subject of
<br />
<br />
<br />District inflow monitoring to diagnose sources of highest loadings.
<br />
<br />Subwatershed 14e: E2 Wetland
<br />
<br />Policies:
<br />
<br />A.3, B.l, B.2, B.3, B.4, B.5, C.l, C.2, C.3, C.4, C.5, D.I, D.2, E.l, E.2, E.3,
<br />E.5, and F
<br />
<br />This subwatershed was comprised of a large restored wetland complex located southeast of
<br />
<br />I-35W and 1-694. The subwatershed is hydraulically overloaded. An adjustable outlet
<br />
<br />
<br />structure is used to moderate level fluctuations and capture initial spring runoff for
<br />
<br />
<br />treatment in the wetland area. Beaver activity in both subwatersheds 14d and 14e has
<br />
<br />
<br />resulted in unacceptable water level fluctuations in recent years. Detailed hydrologic
<br />
<br />
<br />modeling was performed under the Lake Johanna watershed study and extended over all
<br />
<br />
<br />subwatershed 14 areas.
<br />
<br />Subwatershed 15a: Jones Lake
<br />
<br />Policies:
<br />
<br />A.3, B.1, B.2, B.3, B.4, B.5, C.1, C.2, C.3, C.4, C.5, E.l, E.2, E.3, E.5, and F
<br />
<br />This area drains approximately 3.61 sq mi. Drainage through subwatersheds 15a and 15b
<br />was documented in the Pike Lake watershed study completed prior to initiation of the Long
<br />Lake Chain of Lakes Grant Program. The District performed project work to increase
<br />
<br />4-24
<br />
<br />10/97
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