SLIA 2015 Annual Meeting - PowerPoint...
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For the: By: Kevin P. McElyea, LLA Grand Traverse County Drain Commissioner Saturday, August 1, 2015 –9:00 am. Garfield Township Hall –3848 Veterans Drive Email: [email protected] Report on the Silver Lake Drainage System
Transcript of SLIA 2015 Annual Meeting - PowerPoint...
For the:
By: Kevin P. McElyea, LLA
Grand Traverse County Drain Commissioner
Saturday, August 1, 2015 – 9:00 am.
Garfield Township Hall – 3848 Veterans Drive
Email: [email protected]
Report on the Silver
Lake Drainage System
� Drainage system components and locations.
Presentation Overview
� Conditions and elevations of components.
� Drain Fund balance and estimated assessments.
� Opportunity for questions.
� Brief historical background information.
Historical Background:
How the drain project started:This lake drain project had been considered as early as 1966 by the
Drain Commissioner working with the Silver Lake Improvement
Association, with a subsequent petition filed in circuit court by the
Prosecuting Attorney in 1974 to determine a normal water level for
Silver Lake. ---The project was controversial and there was not
agreement among the property owners in 1974. In May of 1986 the
water rose to 865.2 ‘and residents on Silver Lake were sand bagging
their lake frontage and pumping out as much as 18 inches of water from
their yards and buildings. ---This then lead to the 1986 petition and
Circuit Court action to set the maximum water level at 862’ in 1987. An
estimated 1,800 gallons per hour was drained from Silver Lake into
Beitner Creek as part of a $250,000 drain outlet project. The project
was paid over three years by 353 frontage parcels and 86 shared access
parcels with the maximum assessment of $1,199 for the lowest
elevation frontage parcel to $75 for shared access parcels.
Historical Background:
Drain Outlet Design:The design storm selected is one that will occur once in 50 years, which
results in a rainfall of 4” in 24 hours. This rainfall produces a runoff rate
of 245 CFS for 24 hour period which is the equivalent of 7.25” rise in the
lake.
A 6 foot diameter intake structure with a butterfly valve and a 14” pipe
was installed from Silver Lake to Cox’s Pond at the southwest corner of
US-31 and Sawyer Road.
The proposed Lake Level Feasibility Study considered the cost to install
wells and pump water into the lake to maintain it at a consistent
elevation. Those cost and environmental impacts were not supported
in the final court order establishing the maximum lake level, therefore a
minimal lake level was not ordered.
Constructed outlet
Constructed outletConcrete overflow structure rim elevation
is at 861.9’:
Valve House
Constructed outlet6-ft diameter vertical concrete overflow
structure: Rim Elevation @ 861.9’Drain Commissioner installed a fence around the structure to inhibit
the effectiveness of the beaver construction activities.
Constructed outlet
Recent Survey WorkOn June 29, 2015
Recent Survey WorkOn June 29, 2015
Recent Survey WorkOn June 29, 2015
Recent Survey WorkOn June 29, 2015
Lake Level Trends?1988 to 2008
Silver Lake - Average Lake Level Per Year
1990
1991
1992
1993
1999
2000
2001
2002
2003
2005
2006
2007
1988
1998
1996
2004
1994
1997
1989
1995
2008
860.00
860.50
861.00
861.50
862.00
862.50
863.00
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
Year
Lake Level
Lake
Level
Fund balance is $1,413.78 Last assessment was in 2010
TO: GRAND TRAVERSE COUNTY BOARD OF COMMISSIONERS:
FROM: KEVIN P. MCELYEA, COUNTY DRAIN COMMISSIONER
DATE: SEPTEMBER 23, 2009
RE: FINAL COMPUTATION OF COSTS AND FINAL APPORTIONING OF COSTS FOR MAINTAINING THE LAKE LEVEL OF SILVER LAKE.
SILVER LAKE - LAKE LEVEL FINAL COMPUTATION OF COSTS:
A. Establishing a special assessment district, including preparation of assessment roll and levying assessments:
GIS Mapping 645.03
Landowner Mailing 287.81
Publication of Notices 164.00
B. Locating, constructing, operating, repairing, and maintaining a dam or works of improvements necessary for
maintaining the normal level:
Water Testing 2,420.00
Eng. Inspection Report Tri-annual 350.00
C. Legal Fees 4,000.00
D. Contingency 1,238.16
Total amount to be assessed 9,105.00
SILVER LAKE - LAKE LEVEL FINAL APPORTIONMENT OF ASSESSMENTS:
366 frontage parcel assessments at $24 per parcel
107 shared access parcel assessments at $ 3 per parcel
For the:
By: Kevin P. McElyea, LLA
Grand Traverse County Drain Commissioner
Saturday, August 1, 2015 – 9:00 am.
Garfield Township Hall – 3848 Veterans Drive
Phone: 922-4807, Email: [email protected]
Any Questions on the Silver Lake
Drainage System?
