HomeMy WebLinkAboutLake_Nancy_Summary2022
The City of Edina
conducts an aquatic
plant survey. Curly-leaf
pondweed is found
and treated.
common carp
(invasive)
Lake Nancy and Otto Pond
Watershed District: Nine Mile Creek Public water ID: 27067700
Fish population:
Lakes History and Management
Denotes current Lake Nancy and Otto Pond drainage
areas; historical drainage areas were larger.
2015
Shoreline residents
meet to discuss
incorporating as a
lake association.
Construction of
Highway 62 and
local roadways.
2016
Lake Nancy Lake Association is
incorporated with at least 50% of
shoreline owner involvement.
The purpose of the association is to:
(1) maintain, protect, and improve the
water quality, aesthetic values, wildlife
habitat, and recreational capacity of
Lake Nancy,
(2) educate shoreline owners and the
public about the condition and
protection of Lake Nancy, and
(3) provide a representation
framework for shoreline owners’
interests regarding Lake Nancy.
Historically, Lake Nancy, Otto
Pond, and present-day Swimming
Pool Pond were all connected.
The construction of Highway 62
and local roadways in the late
1950s and early 1960s resulted in
the waterbodies being separated.
2018
NMCWD commissions a sheries
survey which identied an abundant
goldsh population in Lake Nancy and
Lake Cornelia, connected via a storm
sewer under Highway 62. Similar to
carp, goldsh have the potential to
negatively impact water quality by
stirring up wetland sediments and
increasing nutrient levels due to
nutrient cycling through the sh gut.
2019
Aquatic plant survey
conducted on Lake
Nancy. No curly-leaf
pondweed found.
2020
Aquatic plant survey conducted in
the spring on Lake Nancy. No
curly-leaf pondweed found during
the survey, but a resident reports
seeing the plant later in the year.
2021
Curly-leaf pondweed is
found in two locations
during a formal survey
of Lake Nancy. These
invasive aquatic plants
were hand-pulled.
2021
A report on the invasive goldsh
population and inter-waterbody
movement in the Lake Cornelia
system is prepared for the
NMCWD. A population of about
8,000 goldsh is estimated in
Lake Nancy.
The report's recommendation is
to test multiple removal
approaches on Lake Cornelia
(baited box netting, baiting and
seining, stream trapping) before
considering other management
activities for Lake Nancy.
2022
A report evaluating internal loading
in Lake Nancy and Otto Pond is
prepared for the NMCWD.
The review of water quality data and
information from sediment cores
suggest that Lake Nancy has
signicant “internal loading” (the
release of phosphorus into the lake
from bed sediment). Some of this
loading is assumed to come from
goldsh and carp stirring up
sediment. By contrast, the water
quality of Otto Pond is relatively
good and there is no evidence of
internal loading.
Lake Nancy and Otto Pond are located just north of Highway 62 and west of Highway 100.
The wetlands are not connected, but both ultimately drain to Lake Cornelia. At times, Otto Pond
also drains north to the Minnehaha Creek watershed.
There is a public trail between Lake
Nancy and Otto Pond, but no public
boat access on either waterbody.
Non-motorized boats only.
Amenities:
10 acres
(surface area)
4 acres
(surface area)
30 acres
(drainage area)
119 acres
(drainage area)
How You Can Help
Steps that you can take to
help Lake Nancy and
Otto Pond include:
2017
Aquatic plant survey
conducted on Lake
Nancy and no curly-leaf
pondweed found.
1978
A DNR permit for submerged aquatic plant
control is granted for Otto Pond. These
treatments occur annually until 2015.
1980
A DNR permit to treat planktonic
algae and submerged vegetation is
granted for Lake Nancy. Annual
algae treatments are ongoing;
treatment for submerged aquatic
vegetation occur until 2015.
2015
Annual treatment
of algae begins in
Otto Pond.
Annual treatment of Lake
Nancy for submerged
aquatic vegetation resumes.
Water Quality
Water quality data was obtained during a 2021
study of internal loading in Lake Nancy and Otto
Pond. Summer averages of water quality parameters
are provided above for both Lake Nancy and
Otto Pond.
This data shows Lake Nancy fails to meet the state's
goals for water quality within shallow lakes. Elevated
total phosphorus levels promote algal growth, which
reduces water clarity.
Phosphorus and chlorophyll-a levels in Otto Pond
are just slightly above state goals, reecting better
water quality than in Lake Nancy.
Algae Level
(Chlorophyll-a)
Total Phosphorous
Levels
20 g/L60 g/L
Water
Clarity
goldsh
(invasive)
1960s1940s 2021
Water Levels Woodale AveLearn more about these strategies at ninemilecreek.org
OTTO POND
Recent water quality data
Data are only available for Lake Nancy
NMCWD = Nine Mile Creek Watershed District
NANCY
4 ftMax
5 ftMax
1 ft1 ft
Wetland depth Wetland depth
Installing rain gardens
and planting
shoreline buffers
Cleaning up grass
clippings and leaves
Participating in the
adopt-a-drain program
(mn.adoptadrain.org)
Redirecting gutter
downspouts towards
vegetated areas
Minimizing use of
fertilizer on lawns
Late 1950s-
Early 1960s
Interactive ood map
Water resources library
Find more information
from the City of Edina:
1964-2022
Water level data is available from the
Minnesota Department of Natural Resources
and the Nine Mile Creek Watershed District.
Lowest recorded
water level:
861.0 ft
(July 28, 1988)
Highest recorded
water level:
863.3 ft
(April 10, 1965)
1.0
Meters
0.2 Meters
(Nancy)
0.6 Meters
(Otto)
256
95
67 24
State goalsNancyOtto