5.17
Rest Area Pond Watershed Management Plan ................................................... 5.17-1
5.17.1 General Information ............................................................................. 5.17-1
5.17.2 Water Quality Management Plan .......................................................... 5.17-2
5.17.2.1 Water Chemistry Data ............................................................ 5.17-3
5.17.2.2 Biological Data ...................................................................... 5.17-4
5.17.3 Water Quantity Management Plan ........................................................ 5.17-5
5.17.4 Groundwater ........................................................................................ 5.17-6
5.17.5 References ............................................................................................ 5.17-6
List of Tables
Table 5.17-1 Summary of Rest Area Pond summer average water quality ................................. 5.17-3
List of Figures
Figure 5.17-1
Rest Area Pond Watershed – Subwatersheds and Flow Routing ............ 5.17-7
Figure 5.17-2
Rest Area Pond Watershed – Current (2010) and Future (2030) Land Use ......
............................................................................................................. 5.17-8
Figure 5.17-3
Rest Area Pond Water Quality Data Summary ...................................... 5.17-9
Figure 5.17-4
Rest Area Pond Water Level Data ....................................................... 5.17-10
Figure 5.17-5
Rest Area Pond Outlet ......................................................................... 5.17-11
List of Appendices
Appendix A-5.17
Additional Macrophyte Information
Appendix B-5.17
Inspection, Maintenance, and Operation Plan
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Rest Area Pond Watershed Management Plan
Page 5.17-i
5.17 Rest Area Pond Watershed Management Plan
5.17.1 General Information
Rest Area Pond Local Watershed Information
Tributary Area (acres)
MDNR-Designated Basins within
Watershed
Downstream Watershed
Rest Area Pond Information
1,610 local; 17,781 total
82-0434W, 82-088W, 820465W
St. Croix River
MDNR Designation
Surface Area (acres)
Mean Depth (feet)
Maximum Depth (feet)
Volume Below Discharge Elevation
(acre-feet)
Discharge Elevation
None
12.6
Not Determined
Not Determined
Not Determined
Outlet Type
MDNR Ordinary High Water Level
(OHW)
100-Year Flood Level
VBWD “Allowable Fill”
(cubic yards/lineal foot of shoreline)
(See Section 4.7.)
VBWD Water Quality Category
834.0
Staged (orifice, stoplog
weir)
Not Determined
857.5
1.2
Stormwater Pond
Rest Area Pond and Barton Pit
(see Section 5.35) were part of a
single dry depression located in
the west half of Section 33, T29N,
R20W in West Lakeland
Township. As part of the
Minnesota Department of
Transport’s (MnDOT) Interstate
94 construction, MnDOT acquired
the west half of the depression and
constructed a dam on a ridge
across the center of the depression.
Discharges from the VBWD’s
Project 1007 and runoff water
from the highway drain to this
depression. As part of
Project 1007, MnDOT required
that the VBWD construct an outlet
for Rest Area Pond. Prior to
construction of the outlet, the pond
depended entirely on seepage and
evaporation to dissipate runoff. All
of Project 1007 drains through
Rest Area Pond, and the pond is
the last basin before the runoff
from Project 1007 discharges to
the St. Croix River.
The local Rest Area Pond
watershed is 1,610 acres, and is
shown on Figure 5.17-1. The local
watershed includes portions of the
Cities of Lake Elmo, Woodbury,
and Afton, and West Lakeland
Township. Since flows from West
Lakeland Storage Site enter total
Rest Area Pond, the total tributary
area is 17,781 acres.
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Rest Area Pond Watershed Management Plan
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Rest Area Pond and the land surrounding it are owned by MnDOT. Current (2010) land use within
the Rest Area Pond local watershed, aside from the highway, is primarily agricultural, with some
commercial areas in the far upstream portion of the watershed and some residential land use in the
east end of the watershed. The anticipated future (2030) land use includes the conversion of the
agricultural areas to rural or large-lot residential land use, additional commercial land use, and multioption land use. Figure 5.17-2shows the current (2010) and anticipated future (2030) land use of the
local Rest Area Pond watershed.
There is no public boat access to the pond and its use is limited to aesthetic viewing by rest area
visitors and detaining and treating stormwater runoff. The VBWD does not expect use of the pond to
change.
5.17.2 Water Quality Management Plan
The VBWD classified and will manage Rest Area Pond as a Stormwater Pond (see Section 4.1 –
Water Quality). This is consistent with the 2005 Plan and the 1995 Plan, in which the VBWD
designated Rest Area Pond as a stormwater pond.
The VBWD water quality guidelines for Stormwater Ponds, including Rest Area Pond, are related to
maintaining the designed function of the water body.
Specific water quality implementation tasks for Rest Area Pond include the following:
1. The VBWD will cooperate with other entities to monitor the water quality of the Rest Area
Pond as needed. The VBWD’s ongoing water quality monitoring program (see Section 4.1 –
Water Quality) does not specify monitoring intervals for waterbodies classified as
Stormwater Ponds.
The VBWD will continue to contract with the Washington Conservation District (WCD) and
Metropolitan Council (or others) to monitor the water quality of the outflow from Rest Area
Pond as part of its continuous outflow monitoring of Rest Area Pond (see Section 5.17.3).
2. The VBWD will cooperate with other entities in support of macrophyte management efforts.
VBWD efforts may include:

point-intercept surveys of aquatic vegetation

preparation of lake vegetation management plans (LVMP)

completion of Invasive Aquatic Plant Management (IAPM) Permit applications

design of herbicide treatment programs

participation in meetings with MDNR staff
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
other technical analysis
3. The VBWD will continue to implement its Rules and Regulations (2013, as amended) in the
Rest Area Pond watershed. The VBWD Rules address water quality performance standards
for development and redevelopment projects, as well as required vegetated buffers around
VBWD lakes, streams, and wetlands. The VBWD Rules and Regulations are included in this
Plan as Appendix A-4.5.
5.17.2.1 Water Chemistry Data
Water quality monitoring of Rest Area Pond has been conducted several times since 1986. The
VBWD collected water quality samples from the Rest Area Pond during twice in 1986 and
throughout the summers of 2001 and 2003. Mn/DOT collected samples from the pond three times
during 1990 and once in 1991. Rest Area Pond has been sampled annually since 2006. Water quality
samples are typically analyzed for total phosphorus and chlorophyll a, and Secchi disc transparency
(see Appendix A-4.1 – Water Quality Background Information).
The results of recent water quality monitoring of Rest Area Pond are presented in Table 5.17-1.
Available water quality data collected since 2001 is presented graphically in Figure 5.17-3.
Table 5.17-1 Summary of Rest Area Pond summer average water quality
1
Parameter
Units
10-year
Average
(2004-2013)
Total Phosphorus
ug/L
194
None
NA
Chlorophyll a
ug/L
61.8
None
NA
Secchi Disc Depth
m
0.71
None
NA
Trend in
Average
MPCA
Standard1
There are no MPCA standards applicable to stormwater ponds
The results of the water quality monitoring indicate that the water quality of the pond is relatively
poor. Since 2001, the worst water quality generally occurred during the period from 2007 through
2010, with the highest (i.e., worst) summer average chlorophyll a and summer average total
phosphorus concentrations occurring in 2009 (see Figure 5.17-3). Water quality observed in 2013
was improved relative to that period, and closer to the values observed in the early 2000s.
There are no statistically significant improving or declining trends in summer average Secchi disc
transparency, chlorophyll a, or total phosphorus identifiable within the last 10-years.
In the past, the VBWD has measured the water quality of inflows and outflows from the pond. Those
measurements indicated that water quality of the pond inflow and outflow was much better than the
water quality of discharges into the MnDOT system downstream of the pond.
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In cooperation with the WCD and Metropolitan Council, the VBWD began monitoring the outflow of
Rest Area Pond in 2011 (see Section 5.17.3). During that year, six water quality grab samples were
collected during the summer. The summer average total phosphorus concentration among those
samples was 108 ug/L; this is similar to the approximately 88 ug/L summer average total phosphorus
concentration observed in the pond in 2011 (see Figure 5.17-3). The concentration of chloride
observed in the Rest Area Pond outflow in 2011 was 102 mg/L. No water quality samples were
collected from the Rest Area Pond outflow in 2012 because the pond did not discharge during the
monitoring period.
5.17.2.2 Biological Data
Several types of biological data have been compiled and evaluated for Rest Area Pond, in addition to
physical and chemical parameters. Biological data including macrophyte (large aquatic plant),
phytoplankton (non-rooted floating plants – algae), zooplankton (microscopic aquatic animals), and
fisheries data can provide insight into the ecological quality of a waterbody. Section 4.2 (Water
Quality Background Information) provides more information about the importance of fisheries and
other biological data.
The MDNR does not manage the Rest Area Pond for fisheries. There are no stocking or survey
programs for the pond, and no fish consumption advisories are posted. The Rest Area Pond does not
have a fisheries-use classification.
The VBWD conducted macrophyte surveys of Rest Area Pond in 2003 and 2009. Appendix A-5.17
includes information from the June 9, 2003, August 18, 2003, and June 5, 2009 macrophyte surveys.
The VBWD collects macrophyte data to identify the conditions of plant growth throughout the pond.
Macrophytes are the primary producers in the aquatic food chain, converting the basic chemical
nutrients in water and soil into plant matter through photosynthesis, which becomes food for all other
aquatic life. While macrophytes can impact the recreational use of a water body, they are critical to
the ecosystem as fish and wildlife habitat.
In 2003, severe algal blooms throughout the growing season limited plant growth to two small areas
within the pond and two to four small shoreline growth areas. Three individual species were observed
in or on the shoreline of Rest Area Pond during 2003. Only one species was observed in 2009. Two
native emergent species, water smartweed (Polygonum amphibium) and arrowhead (Sagittaria spp.)
were found growing on the pond’s shoreline in 2003, and cattails (Typha sp.) were the only plants
observed in 2009.
The third species, an exotic (non-native) submerged species, curlyleaf pondweed (Potamogeton
crispus), was found in two small areas within the pond on its east side during June of 2003 , but it was
not observed in 2009. Because of the pond’s poor water transparency, this undesirable plant was the
only submerged plant found in the pond in 2003. Although this plant generally causes problems in
lakes and ponds, its absence in the 2009 survey indicates it may not be a problem in Rest Area Pond.
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However, since this plant’s turions (like seeds) can flow downstream and infest downstream water
bodies, the presence of this plant in Rest Area Pond could result in the infestation of the St. Croix
River.
The VBWD will continue to provide technical assistance to entities seeking to manage aquatic
invasive species.
The VBWD has not collected any phytoplankton or zooplankton data for Rest Area Pond.
5.17.3 Water Quantity Management Plan
At its outlet of Elevation 834.0, the Rest Area Pond has a surface area of twelve acres. The VBWD
determined the 100-year flood level of the pond is Elevation 857.5. Water level data for Rest Area
Pond is available from 1986 through 2014 (see Figure 5.17-4). The data shows that water levels have
not exceeded Elevation 840 during the period of record. The VBWD pond outlet consists of a 60-inch
diameter pipe upstream and a 48-inch diameter pipe downstream of a manhole. Inside of the manhole
is a weir, which has a 12-inch diameter orifice that controls the pond outflow between
Elevations 834.0 and 842.5, the top of the weir. Figure 5.17-5shows the outlet.
The outlet pipe crosses the Barton Pit and carries water east to Stagecoach Trail (CSAH 21). East of
CSAH 21, the pipe follows the MnDOT right-of-way along the north side of I-94. Further
downstream, the VBWD pipe discharges to the MnDOT pipe at a point just west of the intersection
of I-94 with T.H. 95. From this point, the MnDOT pipe carries water to the St. Croix River.
In accordance with the conditions of the VBWD’s MDNR permit for the Rest Area Pond dam
alterations, the VBWD developed an inspection, maintenance and operation plan for the dam. The
plan calls for an annual joint inspection of the dam by MnDOT and VBWD. To date, only minor
brush and debris removal has been required as a result of the inspections. The cooperative agreement
between MnDOT and VBWD requires that MnDOT perform the maintenance and operation work and
that VBWD pay 80% of those costs. One of the maintenance items calls for monthly measurement of
the Rest Area Pond water level. MnDOT measured the water level on a regular basis until spring of
1991. Since that time, water level measurements have been performed approximately twice per year.
During annual dam inspections, the VBWD records the water levels of the pond. VBWD requested
that MnDOT resume the water level readings on the pond, as required by the cooperative agreement.
Appendix B-5.17 includes the Rest Area Dam inspection, maintenance, and operation plan. The
VBWD will continue to follow the MDNR permit for the inspection, maintenance, and operation plan
for the dam.
In 2011, the VBWD began contracting with the WCD to continuously monitor outflow from Rest
Area Pond. Data collected in 2011 indicate that the pond discharged from mid-July through
September of that year, with outflows of up to 19 cubic feet per second (cfs). There was no outflow
from Rest Area Pond in 2012. The VBWD will continue to contract with the WCD or other entities to
perform continuous flow monitoring of the Rest Area Pond outflow.
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In 2013, the National Oceanographic and Atmospheric Administration (NOAA) published Atlas 14,
Volume 8 (see Section 4.7.6). Atlas 14 contains updated precipitation data for Minnesota and
supersedes data used to establish the 100-year flood levels for Rest Area Pond. Within the VBWD,
the 100-year, 24-hour event within the VBWD increased from 6.0 inches to 7.3 inches. The VBWD
plans to update the 100-year flood level for VBWD waterbodies, including Rest Area Pond, to reflect
Atlas 14 precipitation data and other current data sources. These updates may result in an increased
flood level.
The VBWD will work with MnDOT to evaluate the feasibility and benefits of further restricting the
Rest Area Pond outlet. A further restriction might provide addition water management benefits to the
area, including more groundwater recharge and less frequent discharge to the St. Croix River.
5.17.4 Groundwater
It is estimated that water seeping from Rest Area Pond flows easterly and likely does not contribute
to the groundwater feeding Valley Creek. More information regarding regional groundwater flow
patterns is discussed Section 3.7.
A portion of the extreme southeastern area of the Rest Area Pond watershed is within the
Lakeland/Lakeland Shores Special Well and Boring Construction Area (SWBCA). See Section 4.2.6
for more information.
There are piezometers located in the dam of Rest Area Pond. Prior to the construction of Project
1007, MnDOT conducted a seepage study of the pond. The purpose of the study was to demonstrate
that the infiltration capacity of the site would be adequate without an outlet. The VBWD does not
have the data collected by MnDOT as part of that study.
5.17.5 References
Barr Engineering Company. September 1995. Water Management Plan, Valley Branch Watershed
District.
Barr Engineering Company. December 2005. Valley Branch Watershed District Watershed
Management Plan.
National Oceanographic and Atmospheric Administration (NOAA). 2013. Atlas 14 Precipitation Frequency Atlas of the United States – Volume 8.
2015 Valley Branch Watershed District Watershed Management Plan
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Rest Area Pond Watershed Management Plan
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ROS-5
ELM-1
27
28
26
EPL-2
GOS-2
Lake Elmo
82-111 W
FL-100 = 900
NL
= 884
AF
= 180
EPL-3
ROS-6
ROS-8
ROS-7
10th St N
82-113 W
GOS-1
Goose
Lake
33
34
GOS-3
KRM-11
35
7
6
5
4
19
KRM-10
RAP-20
25
HRS-1
ROS-3
ROS-2
ROS-4
Kramer
Pond
KRM-3
FL-100 = 914
NL
= 906
AF
= 70
KRM-4
KRM-1
RAP-12
7
6
5
4
WLS-3
82-88 W
FAL-1
FL-100 100 Year Flood Level
Normal Level
NL
AF
OHW
§
¦
¨
2
Woodbury
FAL-15
82-432 W
1
FAL-30
FAL-28
FAL-27
FAL-17
FAL-12
FL-100 = 879.9
NL
= 865
AF
= 502
FAL-31
FAL-25
FAL-21
FAL-19
FAL-23
FAL-32
FAL-33
FAL-34
Afton
95
"
FAL-35
FAL-22
Brookview Rd
9
10
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11
12
FAL-51
82-6 W
FL-100 = 886.4
= 875
FAL-53 NL
AF
= 350
OWH = 848.1
7
FAL-54
Pipe
MN-DOT Pipe
Section Lines
VBWD Legal Boundary
Municipal Boundary
Landlocked: Basin does not overflow using VBWD simplified
method for calculating its 100-year flood level or
using a more detailed analysis, such as the 1%
probability flood level.
6
FAL-20
FAL-18
Acre Feet of Storage at 100 Year Flood Level
DNR Established Ordinary High Water Elevation
Project 1007
- Catch Basin
&
. Manhole Cover
!
Open Channel
94
RAP-11
Cottage Grove Dr
3
Woodbury Dr
4
82-434 W RAP-19
Subwatershed Contributing Runoff
Lakes, Ponds, Wetlands,
Approximate Normal Water Surface Level
Lakes, Ponds Wetlands,
Approximate 100 Year Flood Surface Level
31
§
¦
¨
FAL-13
DNR Protected Waters Designation
Overflow Path from Semi-Landlocked Watershed
RAP-14
FAL-16
Subwatershed Divide
Subwatershed Designation
Overflow Path from Landlocked Watershed
(Non-Contributing Subwatershed)
West Lakeland
Township
94
RAP-18
LEGEND
Rest Area Pond Watershed
RAP-1
82-106P
RAP-13
KRM-2
1500
Major Watershed Divide
KRM-5
RAP-16
0
&
WLS-15
RAP-15
RAP-17
750
Scale in Feet
WLS-18
WLS-16
36
1,500
&
&
WLS-19
WLS-14
15
FL-100 = 886
NL
= 870
AF
= 608
!
.
&
WLS-17
ROS-14
ROS-15
82-117 W
FL-100 = 878
NL
= 875.2 (870)
AF
= 521
OHW = 876.8
ROS-13
KRM-8
I
82-74 P
30
Rose
Lake
82-112 W
7
6
5
4
KRM-6
KRM-7
Horseshoe
Lake
HRS-6
ROS-1
ROS-12
ROS-11
GOS-6
GOS-4
KRM-9
HRS-11
HRS-12
17
GOS-5
Keats Ave N
FL-100 = 932
NL
= 921
AF
= 801
OHW = 924.4
GOS-8
ROS-10
ROS-9
GOS-7
10
7
6
5
4
HRS-7
Manning Ave N
EPL-1
HRS-13
Lake Elmo Ave N
EPL-4
HRS-1
HRS-10
FAL-56
Semi-Landlocked: Basin does not overflow in the 100-year
24-hour rainfall total or the 100-year 10-day
snowmelt event, but does overflow when
calulating its 100-year flood level based on
the VBWD simplified method or the 1%
probablility flood level.
Figure 5.17-1a
REST AREA POND WATERSHED
WEST PORTION
Valley Branch Watershed District
3,000
WLS-24
HRS-4
WLS-23
DWN-35
WLS-22
25
Horseshoe
Lake
82-74 P
WLS-20
WLS-19
&
&
-
MRG-9
MRG-12
WLS-18
WLS-17
Rose
Lake
82-112 W
WLS-13
10th St N
&
WLS-14
ROS-1
FL-100 = 886
NL
= 870
AF
= 608
WLS-12
WLS-15
WLS-4
Lake Elmo 4
15
7
6
5
WLS-16
WLS-3
36
31
FL-100 = 872.7
NL
= 861
AF
= 500
WLS-5
&
&
&
WLS-2
&
West
Lakeland
Storage
Site
WLS-10
MRG-5
10
7
4
6
5
RAP-3
WLS-29
AF
OHW
!
.
!
.
. 34 !
BRT-1
FAL-10
Landlocked: Basin does not overflow using VBWD simplified
method for calculating its 100-year flood level or
using a more detailed analysis, such as the 1%
probability flood level.
EDI-8
§
¦
¨
94
RAP-11
FAL-27
FAL-20
1
FAL-28
FAL-32
FAL-31
FAL-21
FAL-25 95
"
6
Woodbury
FAL-23
FL-100 = 879.9
NL
= 865
AF
= 502
FAL-35
FL-100 = 870
NL
= 837.5
= 890 FAL-46
OHW = 848.1
Afton
FAL-39
FAL-43
FAL-47
5
FAL-38
FAL-40b
FAL-40
FAL-42
FAL-45
EDI-13
Fahlstrom
Ponds
FAL-49
FAL-41
FAL-48
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EDI-17
EDI-18
FAL-44AF
82-5 W
FAL-34
FAL-33
FAL-77
82-465 W
FAL-30
FAL-50
FAL-75
EDI-12
EDI-10
Semi-Landlocked: Basin does not overflow in the 100-year
24-hour rainfall total or the 100-year 10-day
snowmelt event, but does overflow when
calulating its 100-year flood level based on
the VBWD simplified method or the 1%
probablility flood level.
EDI-9
EDI-16
EDI-14
EDI-15
4
FL-100 = 810.9
NL
= 700
AF
= 66
82-464 W
EDI-11
FL-100 = 813.2
Metcalf
Marsh
Project 1007
- Catch Basin
&
. Manhole Cover
!
Open Channel
Pipe
MN-DOT Pipe
Municipal Boundary
EDI-20
EDI-19
Acre Feet of Storage at 100 Year Flood Level
DNR Established Ordinary High Water Elevation
Section Lines
VBWD Legal Boundary
FL-100 = 857.5
NL
= 834.0
RAP-10
FAL-9
FAL-76
!
.
FL-100 100 Year Flood Level
Normal Level
NL
!
.
FAL-6
FAL-2
&&
-
Rest
Area
Pond
RAP-1
Subwatershed Contributing Runoff
Lakes, Ponds, Wetlands,
Approximate Normal Water Surface Level
Lakes, Ponds Wetlands,
Approximate 100 Year Flood Surface Level
RAP-8
FAL-8
Subwatershed Divide
Subwatershed Designation
DNR Protected Waters Designation
Overflow Path from Landlocked Watershed
(Non-Contributing Subwatershed)
Overflow Path from Semi-Landlocked Watershed
MRG-3
RAP-7
FAL-7
WLS-30
82-74P
RAP-6
33
FAL-3
FAL-1
Major Watershed Divide
RAP-1
RAP-2
FAL-4
1500
LEGEND
RAP-5
RAP-4
32
WLS-1
27
RAP-9
FAL-5
0
Rest Area Pond Watershed
MRG-4
MRG-6
WLS-8
WLS-7
RAP-12
Manning Ave
MRG-2
WLS-11
WLS-6
71
!
(
Mergens
Pond
FL-100 = 852.5
NL
= 832.5 82-482 W
AF
= 959
MRG-8
WLS-9
750
Scale in Feet
28
MRG-7
MRG-11
82-488 W
Neal Ave N
ROS-2
1,500
I
MRG-1
MRG-10
&
&
!
(
29
MRG-13
West Lakeland Township
HRS-1
65
MRG-16
MRG-17
MRG-15
30
!
.
MRG-18
MRG-14
WLS-21
HRS-3
FL-100 = 878
NL
= 875.2 (870)
HRS-2
AF
= 521
OHW = 876.8
MRG-19
WLS-26
Oakgreen Ave N
HRS-5
DWN-34
EDI-1
FL-100 = 800.8
NL
= 796.8
AF
= 430
Lake
Edith
82-4 P
3
Figure 5.17-1b
REST AREA POND WATERSHED
EAST PORTION
Valley Branch Watershed District
3,000
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Current
5 (2010) Land Use
5
5
Future
(2030)
Land Use
5
7
6
5
4
7
6
5
4
17
17
65
65
©
¨
©
¨
7
6
5
4
7
6
5
4
10
7
6
5
4
19
10
17B
©
¨
§
¦
¨
7
6
5
4
15
7
6
5
4
19
94
§
¦
¨
94
71
©
¨
95
21
Seasonal/Vacation
Single Family Detached
Manufactured Housing Park
Single Family Attached
Multifamily
Retail and Other Commercial
Source: Metropolitan Council 2010
71
©
¨
7
6
5
4
21
7
6
5
4
16
16
Farmstead
15
95
7
6
5
4
7
6
5
4
Current (2010) Land Use
7
6
5
4
94
§
¦
¨
95
17B
©
¨
Office
Golf Course
Rest Area Pond Subwatershed
Mixed Use Industrial
Railway
VBWD Legal Boundary
Mixed Use Residential
Mixed Use Commercial and Other
Industrial and Utility
Extractive
Institutional
Park, Recreational or Preserve
Major Highway
Airport
Future (2030) Land Use
Major Subwatershed Boundary
I
Agricultural
Undeveloped
Water
4,000
Agricultural
0
Feet
Rural or Large-Lot Residential
Single Family Residential
Multifamily Residential
Commercial
4,000
1 inch = 4,000 feet
8,000
Industrial
Rights-of-Way (i.e., Roads)
Rest Area Pond Subwatershed
Mixed Use
Airport
VBWD Legal Boundary
Institutional
Multi-Optional Development
Park and Recreation
Open Space or Restrictive Use
Railway (inc. LRT)
Vacant or Unknown
Major Subwatershed Boundary
Open Water
Figure 5.17-2
REST AREA POND WATERSHED
CURRENT (2010) AND FUTURE (2030) LANDUSE
2015-2025 Watershed Management Plan
Valley Branch Watershed District
Rose Lake (South) June-Sept. Secchi Disk Transparency
June-Sept. Average Secchi Disk
Transparency (m)
2000
0.0
2002
2004
2006
2008
2010
2012
2014
0.2
0.4
0.6
0.8
1.0
1.2
June-Sept. Average Chlorophyll a (ug/L)
Rose Lake (South) June-Sept. Average Chlorophyll a
180
160
140
120
100
80
60
40
20
0
2000
2002
2004
2006
2008
2010
2012
2014
June-Sept. Average Total Phosphorus
(ug/L)
Rose Lake (South) June-Sept. Average Total Phosphorus
400
350
300
250
200
150
100
50
0
2000
2002
2004
2006
2008
2010
2012
2014
Figure 5.17-3
Rest Area Pond Water Quality
2015 - 2025 Watershed Management Plan
Valley Branch Watershed District
860
855
845
840
835
830
825
Water Elevation
Discharge Elevation
100-Year Flood Level
10/15/2014
10/14/2012
10/15/2010
10/14/2008
10/15/2006
10/14/2004
10/15/2002
10/14/2000
10/15/1998
10/14/1996
10/15/1994
10/14/1992
10/15/1990
10/14/1988
820
10/15/1986
Elevation (ft, MSL)
850
Figure 5.17-4
Date
REST AREA POND WATER LEVELS
2015 - 2025 Watershed Management Plan
Valley Branch Watershed District
Appendix A-5.17 Additional Macrophyte Information
No Macrophytes Found in Water
Macrophyte Densities Estimated as Follows: 1 = Light; 2 = Moderate; 3 = Heavy
Common Name
Submerged Aquatic Plants:
Curlyleaf pondweed
Scientific Name
Potamogeton crispus
Polygonum amphibium
Potamogeton crispus 1
Floating Leaf:
Water
Quality
Monitoring
Location
Emergent:
Water smartweed
Polygonum amphibium
P:23\82\207\LakeMacrophyteMaps\RESTAREAPOND\2003\JUNE2003.CDR RLG 03-19-04
Polygonum amphibium
No Aquatic Vegetation Found:
N
NOT TO SCALE
Dead Oak Trees
REST AREA POND
MACROPHYTE SURVEY
JUNE 9, 2003
No Macrophytes Found in Water
Macrophyte Densities Estimated as Follows: 1 = Light; 2 = Moderate; 3 = Heavy
Common Name
Scientific Name
Submerged Aquatic Plants:
Polygonum amphibium
Polygonum amphibium
Floating Leaf:
Water
Quality
Monitoring
Location
Sagittaria spp.
Emergent:
Water smartweed
Arrowhead
Polygonum amphibium
Sagittaria spp.
P:23\82\207\LakeMacrophyteMaps\RESTAREAPOND\2003\AUGUST2003.CDR RLG 03-19-04
Polygonum amphibium
No Aquatic Vegetation Found:
N
NOT TO SCALE
Dead Oak Trees
REST AREA POND
MACROPHYTE SURVEY
AUGUST 18, 2003
gr
ak
O
Legend
n
ee
e
Av
Dry
Emergent Plants
Submerged Aquatic Plants
Floating Leaf Plants
Submerged Aquatic Plants
None Found
No Aquatic Vegetation
Floating Leaf Plants
None Found
Barr Footer: Date: 11/24/2009 5:01:06 PM File: I:\Client\VBWD\District\Maps\MacrophyteMaps\2009\RestAreaPd_Macrophytes_060509.mxd User: mbs2
Emergent Plants
Common Name
Scientific Name
cattail
Typha sp.
Water Quality
Monitoring Location
0
250
500
Feet
Typha sp.
0
80
160
Meters
Imagery Source: 2008 AE
FIELD NOTES:
- Macrophyte densities estimated as follows:
1=light; 2=moderate; 3=heavy
- No macrophytes found in water
- Low water level
94
94
REST AREA POND MACROPHYTE
SURVEY RESULTS
June 5, 2009
Valley Branch Watershed District
Appendix B-5.17 Inspection, Maintenance, and Operation Plan