Post on 02-Jan-2016
description
transcript
Everything You Wanted to Know About Lake Levels But Were
Afraid to Ask
Public Information Meeting
John P. McCullochOakland County Drain Commissioner
Today’s Discussion Topics
Lake levels Why they’re established Why lake levels fluctuate
Available options Establish a new lake level Augmentation wells/pumps Do nothing
Historical Rainfall Data
RAINFALL IN INCHES
Jan Feb March April May June July Aug Sept Oct Nov Dec total2002 1.88 2.01 1.94 3.24 2.69 1.69 2.16 1.21 1.69 0.87 2.02 1.12 22.52
Year 2001 1.00 3.73 0.86 2.62 4.07 2.36 0.56 2.59 4.43 7.38 3.05 1.35 34.002000 1.52 1.79 1.19 3.03 4.86 6.74 5.02 3.09 6.7 1.69 1.38 2.7 39.711999 3.07 1.50 1.12 4.60 2.62 3.59 3.08 2.46 1.56 0.89 1.1 3.2 28.79
Data from Oakland County rain gauge #841 at Orchard Lake Village City Hall.
Why Levels Are Established
To provide the greatest public benefitTo protect public health, safety, welfareTo preserve the natural resourcesTo protect property values around the lake
Factors Impacting Lake Levels
Natural causes such as rain or snow meltDrought or excessive dry weatherAdjusting the height of the damsPumping water from another source
Existing Conditions
Orchard Lake Rain and surface runoff Augmentation pump (Cass Lake) Pine Lake overflow
Methods to Increase Lake Level at Orchard Lake
Establish new, normal lake level To capture more water in the spring
Construct augmentation well
Action Plan for Orchard Lake
Residents determine what steps to take They can decide to do nothing Whether they want a new normal level If they want to build an augmentation well
Initiate a study To show if it is feasible to raise the normal level To show whether augmentation well is feasible
Economic Impact for Orchard Lake
Cost of engineering study - $20,000 +Augmentation well costs - $500,000 +
Costs would be distributed among current lake level assessment district residents Approximately $81 per district parcel for the
study Approximately $2,016 per district parcel for the
well
Existing Conditions
Upper Straits Lake Level dependant on rain and surface runoff Currently no augmentation well/pump
Methods to Increase Upper Straits Lake Level
Establish new, normal lake level To capture more water in the spring
Construct augmentation wellAdd Upper Straits into augmentation pump
district with… Middle Straits Lower Straits
Action Plan for Upper Straits Lake
Residents determine what steps to take They can decide to do nothing Whether they want a new normal level If they want to build an augmentation well
Initiate a study To show if it is feasible to raise the normal level To show whether augmentation well is feasible To show whether Middle/Lower Straits augmentation
pump can accommodate the addition of Upper Straits
Economic Impact for Upper Straits Lake
Cost of engineering study - $20,000 +Augmentation well costs - $500,000 +
Costs would be distributed among current lake level assessment district residents Approximately $59 per district parcel for the
study Approximately $1,475 per district parcel for the
well
Existing Conditions
Middle & Lower Straits Lakes Level dependant on rain and surface runoff Level maintained by augmentation pump
From Huron River Currently experiencing no low level issues