HomeMy WebLinkAbout03 18 2019 PLSLWD PresentationPrior Lake-Spring Lake
Watershed District
City of Prior Lake
March 18, 2019
Just the Facts…
•26,880 acres in the
PLSLWD
•42 sq. miles; 3 Cities 2 TS
•4 lakes>100 acres; 10
under; 730 wetlands
•17,674 acres in the UW
contribute to the Spring
and Prior Chain of Lakes
•10,593 acres are in the
Upper Watershed (+/-
60% of the District)
•7,081 acres directly drain
to the chain (+/-40% of
the District)
Final
2019 Levy
$1,794,632
(same as 2018)
•Historically relied upon a
large fund balance
•Beginning in 2014,a
fund balance was no longer
available
•Budget now=Levy
•Levy+ grants from the state
and county
•Board planning starts in July
•Final levy due in December
2018 Budget
Jurisdictional support
Jurisdiction Levy % OF 2018 Levy
Sand Creek Township $9,890 .59
Spring Lake Township $164,707 9.84
City of Prior Lake $1,183,761 70.69
City of Savage $279,279 16.68
City of Shakopee $37,027 2.21
How the
District Gets
Things Done
5 Managers Appointed by Scott County
6 Staff: admin, regulation, monitoring, easements,
projects
Scott SWCD & Consultants
Citizens Advisory Committee (CAC)
Technical Advisory Committees (TAC)
Partnering: District jurisdictions; other WDs &
WMOs; Scott County; Metro and State agencies
2018 District Activities
➢Programs
▪Farmer-led Council
▪Cost Share
▪Monitoring and Research
▪Conservation Easements
▪Permitting
▪Rules
▪2020 WRMP
▪Clean Water Clean-Up
▪IPM
➢Projects
▪Potential Infrastructure
Projects
▪Ferric Chloride Plant
▪Prior Lake Outlet Structure &
Channel
▪FEMA
▪Flood Storage
▪Carp Management
▪Spring Lake Alum Treatment
▪Lower Prior Implementation
Programs
FARMER-LED COUNCIL (FLC):
▪Established in March 2013
▪Purpose :
▪Improve public understanding of farming operations
▪Proactively addressing water quality concerns
▪Help develop win-win programming
▪Local networking and education opportunities
▪Lakes
▪Three Rivers Lake Profile Sampling
▪CAMP Lake Sampling
▪Lake Vegetation Mapping
▪Lake Level Monitoring
▪Streams
▪Level and Flow
▪Chemistry
▪Monitored 3 tile lines for the FLC in 2016
▪Precipitation Monitoring
▪Project Effectiveness
Monitoring and Research
2018 Final Lake Data Results
Lake
2018
Phosphorus /
Goal
2018 Chl-A /
Goal
2018 Secchi /
Goal
Spring 41 / <60 32 / <20 1.2 / >1.4
Upper Prior 59 / <60 32 / <20 1.3 / >1.0
Lower Prior 24 / <40 5 / <14 4.8 / >1.4
Fish 34 / <40 17 / <14 1.7 / >1.0
Pike – East 193 / <60 77 / <20 0.4 / >1.0
Pike – West 78 / <60 32 / <20 0.9 / >1.0
June through September averages
Conservation Easements
•Vegetated buffers around wetland,
lake, pond, stream or other natural
area
•Filter pollutants from stormwater
runoff
•Many acquired as part of permit
requirements for a housing
development
•37 Easements with 155 unique
landowners
•23 for Prior Lake
Why does the PLSLWD issue permits?
Land alteration/construction can affect the rate, the volume, and the quality of surface water runoff within the District.
When does PLSLWD issue a permit?
Projects within PLSLWD boundaries that disturb an area of land equal to:
▪10,000 square feet (0.23 acres) in the Shoreland Protection Zone:
▪43,560 square feet (1 acre) outside of the Shoreland Protection Zone.
▪Those in Shakopee are handled by the District
Permit Program
RULE Revisions
▪Last substantially revised in 2003
▪Need to update to meet state guidance & advances in stormwater management
▪Working with a Technical Advisory Committee
▪Rule D: Stormwater Management/ad hoc committee
▪Rule E: Erosion & Sediment Control
This Photo by Unknown Author is licensed under CC BY-SA
2020 Water
Resources
Management
plan
•Major Plan Update
required by MS 103D and
103B
•TAC, CAC, FLC and Public
Meetings
Clean
Water
Clean-Up
Oct 28 @ Sand Point Beach Park
50 volunteers, including local Scouts members
Planted 55 shrubs
Raked 2.5 tons of leaves
Pulled 1 truckload of buckthorn
IPM
Data
Gathering
Physical
Removal
Biological
Control
Barriers
Regular
Monitorin
g
Chemical
Control
Educatio
n
INTEGRATED PEST MANAGEMENT
PROGRAM:
Track Movement
Seine Events
Carp Barriers
Bluegills
Projects
2019
Potential Public
Infrastructure Projects
Budget $100,000
Projects=$155,000
Partner Project Estimated
Cost
Sand Creek
Township
$32,000
Scott County $36,000
Spring Lake
Township
$5,000
City of Prior Lake Jeffers South
Fairlawn Shores
Sunset Hills
$82,000
TOTAL:$155,000
Ferric Chloride
Facility and
Wetland
Prior Lake Outlet Structure
Structure installed in 1983, modified in
2010
Focus slowly swung to water quality
Cooperators
➢Shakopee
➢Prior Lake
➢SMSC
➢PLSLWD
•Annual Work Plan
•Channel Maintenance
•Master Plan
FEMA PROJECTS
Flood Storage Projects
▪2004 Sandey Wetland
▪2014 12/17 Wetland
▪Sutton Lake (in process)
Carp
Management
35,000 pounds!
January 18-20th, 2018
Spring Lake Alum Treatment
•Treatment completed on May 26
•First treatment in 2013; third
expected in 3+ years
Fish Point Park
Lower Prior Implementation Project
THE FUTURE OF WATER
A LITTLE BACKGROUND
•PL At the bottom of a 30 square mile watershed
•No natural outlet
•Lakes fluctuated by 15 feet or more
•Extreme low water levels in 30s and late 80s and
flooding in 1960s
2014 FLOOD DAMAGES
•2014 flood resulted from series of rain events—12.4 inches in 20
days
•Homes flooded on Upper and Lower Prior; lots of sandbagging
•Public infrastructure compromised—street and bridge closures
•PLOC suffered almost $1 million in damages
•Farmers experienced flooded fields; loss of silage, soil and fertilizer
•
OUTLET CHANNEL WATER FLOWS
2016 FLOOD STUDY
•Purpose: Update model; identify flood reduction strategies;evaluate
strategies;put implementation plan together and implement
•Study approved short-term storage goal to reduce flood level of Prior Lake to
905.5, a 25-year storm event from 906.17 (.67 feet)
•Long-term storage goal to reduce even further
•Benefits of storage:WQ,infiltration, WQTY,wetland and aquifer protection
SUTTON LAKE OUTLET MODIFICATION PROJECT
•Primary outlet structure to manage base flow at 939.0
•Secondary outlet structure to manage between base-flow and 100-year flood
•High capacity emergency overflow weir
•Ability to manage lake to lower lake further for storage using boards and a gate
in those structures
NEXT STEPS
1.Collaborate with City to protect Prior Lake residents and the City's
infrastructure by securing flood storage
2.Identify potential sites in the Upper Watershed as well as in the urban areas
3. Secure funding for purchase of easements from willing landowners
4. Secure funding for engineering and construction costs
5.Implement projects to achieve short-term and long-term storage goals
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