HomeMy WebLinkAbout06-24-2010 Agenda and Packet
PARKS AND RECREATION AND FORESTRY COMMISSION
6:30 P.M. | JUNE 24, 2010 | MOUNDS VIEW CITY HALL
MEETING AGENDA
1. CALL TO ORDER
2. ROLL CALL: Kunz, Palm, Kroeger, Arel, Long, Aukee, Peterson | Staff: Dazenski, DeBar
3. APPROVAL OF AGENDA
4. APPROVAL OF MINUTES
A. May 27, 2010 Meeting Minutes
5. PUBLIC INPUT
Citizens may speak to issues not on tonight’s agenda. Before speaking, please give your full
name and address. Please limit your comments to three minutes.
6. YMCA UPDATE
A. Program Updates
B. 2010 Music-in-the-Park Update
7. UNFINISHED BUSINESS
A. Discuss Layout and Costs for Ball Field Memorial Improvements at Greenfield Park
B. Discuss Lambert Park Building Replacement / Other Park Amenities
8. NEW BUSINESS
A. Review Process for Dredging Silver View Pond
9. REPORTS
A. Reports of Commission Members
B. Reports of City Staff
1. Project Updates/Maintenance Activities
2. Urban Forestry Update
10. REQUESTS FOR FUTURE AGENDA ITEMS / OTHER BUSINESS
A. Next Commission Meeting: July 22, 2010
1. Discuss On-Street Parking Options Adjacent to Park Lands - July 2010
2. Review Bike Path Layout - July 2010
3.
4.
11. ADJOURNMENT
Making Storm-Pond Dredging Decisions
Flowcharts for managing urban storm ponds
Minnesota Pollution Control Agency • 520 Lafayette Rd. N., St. Paul, MN 55155-4194 • www.pca.state.mn.us
651-296-6300 • 800-657-3864 • TTY 651-282-5332 or 800-657-3864 • Available in alternative formats
wq-strm4-13 • June 2009
he following three diagrams should
help you understand and make
decisions about storm pond
inspection and dredging process.
These diagrams can be used along with the
Dredge Materials Management guidance
document to plan storm-pond maintenance-
project work.
The guidance manual covers important
factors that apply to all types of dredging
projects, however, it also has a specific
section dedicated to storm ponds in
Chapter 6.
Diagram 1 is an overview of some key
points in the planning process.
Diagram 2 contains more detailed steps for
inspection of ponds and sampling
sediment.
Diagram 3 contains decision steps to
determine proper placement of sediment
removed from storm ponds.
T
Start
Stormwater Pond
is periodically
inspected
Minnesota Stormwater
Manual Appendix D has a
Stormwater Pond/Wetland
Operation & Maintenance
Checklist (see rule of
thumb)
Inspect the
embankment and
emergency
spillway
Inspect inlet riser
and principle
spillway or outlet
structure
Inspect outfall
locations
Measure the
amount of
sedimentation
buildup
Is volume of sediment
approaching 50% of the
capacity of the pond **
inhibiting pond effectiness?
No
Take sample (s) of
sediment to
determine particle
size distribution
Yes
Determine percent
of sample that is
retained on a #200
sieve
Is 93% or more of
sediment retained on a
#200 sieve ?Yes
Have samples
analyzed for
contaminate
concentrations
No
Evaluate Lab
results: Determine
Management level
Dredge Management level
does not need to be
determined. It is assumed
to be management level 1
See Sediment
Placement process
flow chart
Sediment Volume
(Cubic yds)
Recommended # of
samples
0 to 100 1
100 to 500 2
500- to 3,000 3
3,000-30,000 4
30,000-100,000 5
100,000-500,000 6
500,000-1,000,000 7
1,000,000 8 +
** or less than 3 feet of water at the inlet half of pond
wq-strm4-13 Minnesota Pollution Control Agency 6/1
Start
Determine if
sediment needs to
be removed from
Pond
Consider where
dredge material
may be placed.
Review permitting
criteria. Obtain
CSW permit and
Dredge reuse
approval if
required.
Dredge the
sediment using
best management
practices
End
Periodically inspect the
pond. Rule of thumb is when
sediment volume
approaches 50% of the
design volume of the pond
or less than 3 ft of water
depth the sediment needs to
be removed
Variables for determining
where dredge material can
be placed are:
Particle size, current and
future land use,
Contaminant level,
Volume of material
Is a sediment reuse approval
required and or is a
Construction Storm water
Permit required.?
Whether or not permits are
required, sediment and
erosion control is required;
proper reuse or disposal of
sediment is also required
Characterize
Sediment to be
dredged
Take core samples from the
pond. Obtain lab analysis of
samples
Determine Dredge
Management level
wq-strm4-13 Minnesota Pollution Control Agency 6/1
Continued from:
“Determine if Sediment
needs to be removed and
it’s Management Level”
process flow
Is Sediment at
Management Level 3?
Will sediment be treated
to reduce management
level to 1 or 2?
Dredged Material is
not suitable for use or
reuse, and must be
disposed of at an
appropriate solid
waste facility
Yes No
Sediment at
Management level
2?
Yes
No
Dredge reuse
approval not
required.
No
Does volume of
sediment exceed
3000 cubic yards
Yes
Dredge Material
Reuse Approval is
required
Yes
Dredged Material is
suitable for use or reuse
on properties with
an industrial use category
No
Dredged Material is
suitable for use or
reuse on properties
with
a residential or
recreational land use
Of course dredged material
could also go to properties
with industrial or recreational
use . They could even go to
a solid waste facility
Will more than one acre be
disturbed where the dredge
material will be placed?
CSW Permit will
be required
No CSW permit is
required
Yes
No
End
Construction Stormwater
permit application & Dredge
supplement form
wq-strm4-13 Minnesota Pollution Control Agency 6/1