2003-06-23 EC Agenda PacketAGENDA
GOLDEN VALLEY ENVIRONMENTAL COMMISSION
Regular Meeting
Golden Valley City Hall, 7800 Golden Valley Road
Council Conference Room
Monday, June 23, 2003
7:00 P.M.
I. Approval of Minutes — May 19, 2003
II. Program/Project Updates —
➢ Natural Resources Inventory
➢ NPDES Phase II
➢ BCWMC Second Generation Plan
➢ Boone Avenue & Trunk Highway 55 Project
➢ Bassett Creek Park Pond
Wirth Beach
Proposed Developments
III. Commission Member Council Reports
IV. Other Business
V. Adjourn
GAEnvironmental Commission\Agendas\062303.doc
GOLDEN VALLEY ENVIRONMENTAL COMMISSION
Regular Meeting
Minutes
May 19, 2003
Present: Richard Baker, John Giese, Alan Kuentz, Sara Peterson, Joel Wessman
City Staff: Jeff Oliver, City Engineer, Al Lundstrom, Environmental Coordinator,
Tracy Pharr, Administrative Assistant
Absent: Sue Hess, Dawn Hill
I. Call to Order
Kuentz called the meeting to order at 7:10 pm.
II. Approval of Minutes — April 28, 2003
No changes.
MOVED by Peterson, seconded by Wessman, and the motion carried unanimously to
approve the minutes of the April 28, 2003 meeting as submitted.
III. Program/Project Updates
Natural Resources Inventory— Lundstrom stated that, at the last meeting, the
Commission asked the City to have Short Elliott Hendrickson, Inc. (SEH) come up with
a list of other communities that have had natural resources inventories, and what things
these cities have utilized them for. Lundstrom distributed a handout of this information.
Peterson asked if this would be on the City's website. Lundstrom responded there
would be a meeting with the Communications Coordinator, the MIS Coordinator and
management to decide what would be best to display on the website so as not to
overwhelm people with too much non-essential information. Lundstrom stated he would
try to get copies of the Inventory for all Commission Members by the next meeting.
NPDES Phase 11 — Lundstrom said that the Communications Coordinator will have the
complete version of the Storm Water Pollution Prevention Plan (SWPP) on the City's
website by the June meeting. He stated that the Minnesota Pollution Control Agency
(MPCA) had acknowledged receipt of Golden Valley's plan. Lundstrom continued that
software had been purchased to track the City's implantation of the plan. This software
can also be used for Golden Valley's annual reporting to the MPCA.
BCWMC Second Generation Plan — Oliver stated that the Bassett Creek Water
Management Commission is still in discussions with the Cities of Golden Valley and
Plymouth about funding of the plan. Immediately after Tuesday's City Council meeting,
the Council will be discussing options such as ad valorem tax, current funding
mechanisms, etc. This is an ongoing debate. No focus on the CIP yet.
Boone Avenue & Trunk Highway 55 Project — Oliver stated that preliminary design for
this project is underway. He noted that there would be a court hearing this week for
property acquisition of 710 Boone Avenue. The City is moving forward with a floodplain
and wetland water resources study. Golden Valley has met with the Corps of
Engineers, General Mills and people at Brookview. WSB & Associates, Inc., the City's
consultant, will attend a future Commission meeting (possibly July) to report on the
project.
Baker arrived at 7:25 pm. Kuentz turned over chairing the meeting to Baker.
Bassett Creek Park Pond — Lundstrom said that the Minnesota Department of
Transportation (MnDOT) meeting will be held in two weeks. He stated that, in setting up
the meeting, MnDOT had already commented this could be a good project for them to
contribute to. Lundstrom continued that the neighborhood meeting for this project may
be held before the Environmental Commission meeting in June. Lundstrom to contact
Hill with this date.
Wirth Beach — Not much progress on this project. Lundstrom said that the City of
Minneapolis Park Board had asked for a temporary wetland exemption. This exemption
would be for construction of a storm water pond so as to perform some quick
improvements to get the project going. Longer term, a larger storm water pond or rain
garden would be installed. This project should not be confused with the Wirth Lake
Trail. Lundstrom stated that he noticed last week upon inspection that the trail had not
yet been addressed. Kuentz said that it had been filled, but is still leaking underneath
the trail.
Proposed Developments — Oliver noted two developments; the General Motors Training
Facility, at the northeast quadrant of TH 55 and TH 100, and Calvary Lutheran Church.
A company has proposed remodeling the building at the Training Facility for used car
sales. No Public Works comments on this project. The City Council will decide on this
development's approval at its next meeting. Public Works met last week with Calvary
Lutheran Church. The church is in the process of planning for an addition, changes with
their daycare facility and parking issues. Kuentz asked what the sequence of events is
now for this development. Oliver responded that no plans had been submitted yet, so
plan submission would be the next step. After submission, the City has 10 days to
determine if the application is complete, then 60 days for approval, which can be
extended another 30 days. If the Council does not operate within that timeframe, the
development is automatically approved.
III. Review Commission Appointment Status
Baker requested the attached Commission appointment status for information on
election of officers.
MOVED by Kuentz, seconded by Peterson, and the motion carried unanimously to elect
Richard Baker as chair of the Environmental Commission for the next year.
IV. Other Business
Items of Other Business:
➢ Baker asked to have Commission Members' reports on City Council meetings as
a regular agenda topic. He then asked if anyone had attended a Council meeting
since the last Commission meeting. Wessman attended the May 6 Council
meeting. He said that the meeting discussed whether a third garage stall could
be considered a necessity. Wessman also stated the Council has some
concerns on frequent absences of Commission Members at meetings, lack of
quorum and whether staff time is being wasted in the event of low attendance.
➢ Baker inquired about upcoming City Council meeting attendance. He
commented that Hill was to attend the May 20 meeting. Pharr indicated that she
had sent an e-mail to Baker that Hill had called and stated she would be unable
to attend this meeting. Baker asked if someone else could attend in Hill's place if
there are agenda items applicable to the Environmental Commission. Kuentz to
attend the May 20 meeting. Peterson to attend the June 16 meeting.
Baker asked how many of the Manager's budget cut recommendations had been
implemented. Lundstrom noted staff layoffs and postponement of various
building repairs and remodeling.
➢ Kuentz referred back to the Council's concern about staff time at meetings. He
noted that three staff members attend the Environmental Commission meetings,
and asked if this was standard of other Commissions. Oliver responded that he
and Lundstrom are salaried, so only one staff member receives overtime.
Baker asked for a recap of the update on the Natural Resources Inventory and
NPDES Phase II. Lundstrom reviewed this for him.
Giese asked the status of the proposed Wastewater Treatment Plant shared by
Golden Valley, New Hope and Crystal. Oliver responded that all possibilities are
being reviewed. Baker asked if Clancy could come to a future Commission
meeting to discuss the pros and cons of the Plant. Oliver to inquire of Clancy.
No additional business was addressed.
V. Adiourn
The next scheduled meeting will be on June 23, 2003 at 7:00 p.m. The meeting was
adjourned at 8:03 p.m.
Respectfully submitted,
XX��,A � ?LAt4
Tracy E. Pharr
Administrative Assistant
Department of Public Works
=SEN
MEMORANDUM
3535 Vadnais Center Drive, St. Paul, MN 55110-5196 651.490.2000 800.325.2055 651.490.2150 FAX
TO: Al Lundstrom, Environmental Coordinator - City of Golden Valley
FROM: Brad Kovach, Senior Biologist - SEH
DATE: May 1, 2003
RE: Natural Resource Inventories, Subsequent Actions
SEH No. AGOLDV0209.00
The following is a summary of some of the actions or ordinances that were developed after
completion of a natural resources inventory by SEH. Additional recommended actions are also
included:
City of St Cloud Natural Resources Inventory, 2000 to 2001
SEH conducted an inventory throughout St. Cloud's surrounding partially or undeveloped areas.
The City and/or related governing units established the following actions as a result.
• The inventory mapped all of the wetlands. The City then passed a wetland buffer setback
ordinance requiring a setback for all development that is adjacent or proximal to wetlands.
• The City designated several high quality wetlands for "high priority protection" and
avoidance.
• The City also selected several green space areas identified in the inventory as future parks, or
set -asides for conservation purposes.
• The results of the inventory were incorporated into the comprehensive planning process.
• Restorable wetlands were identified and the City designated these as potential mitigation
sites for future mitigation needs.
City of Burnsville Natural Resources Inventory, 2000 to 2001
SEH conducted a citywide natural resources inventory and management plan
• The City followed with a deer control and management plan that referenced areas identified
in the inventory
• The City also used the results to plan and develop a new park within a large green space
• The City restored a wetland fen that was identified by the inventory
• The City utilizes the inventory to identify stormwater management needs and locations for
ponding
• The inventory is a reference source for identification of sites for a pilot project on rainwater
gardens
• The City is considering a open space ordinance and water quality monitoring programs that
will refer to and utilize results of the inventory
Short Elliott Hendrickson Inc. Your Trusted Resource Equal Opportunity Employer
Natural Resource Inventories, Subsequent Actions
May 2, 2003
Page 2
Met Council/Dakota County Natural Resources Inventory of Elko -New Market Townships;
SEH completed a MLCCS Inventory for a proposed utility interceptor project, 2002
• Inventory was utilized to identify sensitive resources to avoid during implementation of
project
• The Inventory also provided the County with a completed MLCCS for future planning
purposes
City of Hugo MLCCS; Not completed yet, on hold
• The City is primarily interested in establishing a wetland setback and buffer ordinance, and
also is interested in nuisance vegetation management
Other actions that can result from a natural resources inventory
• Surface water management plan and related ordinances
• Nuisance vegetation management plan and ordinances
• Wetland management plan and ordinances
• Wildlife management plans (i.e. deer and goose control plans)
• Tree ordinances
• Park and recreation area planning
• Lake or stream management plans
• Ecological restoration (i.e. prairie restoration, oak savanna restoration)
• A natural resources management plan
• Maintenance plans
• Beautification projects
• Planning and zoning, including natural resources based ordinances that link to
planning/zoning actions
• Redevelopment projects that include green space
• Biotic community connectivity and corridor planning
x:\f\goWv\020900Veports&spe s4\tra mittal.do
Bassett Creek Water Management Commission
Planning Process Flowchart
Commission
Appoints Second Generation Plan Committee
Second Generation Plan Committee
Prepares Draft Planning Process
Prepares Draft Work Plan
Develops Proposed Planning Organization
Develops Draft Planning Handbook
Commission
Reviews and Approves Planning Process
Reviews and Approves Work Plan
Reviews and Approves Handbook
Creates Advisory Groups and Defines Responsibilities
Steering Committee
Develops Agendas, Issues Papers for: Policy Advisory Group (PAG),
Technical Advisory Group (TAG), and Citizens Advisory Group (CAG)
Prepares Background Information on Work Tasks for Advisory Groups
Provides Direction for Advisory Groups
Prepares Draft Implementation Strategies
Prepares Draft Capital Improvement Plan
Provides Periodic Updates to Commission
Obtains Periodic Input From Commission
Citizens Advisory Group Technical Advisory Policy Advisory Group
Develop Public Information Program Group Develop Policies
Hosts Public Meetings on Planning Process Address Technical Issues Establishes Performance Monitoring
Financing Plan
Steering Committee
Review Policies and Strategies Proposed by TAG, CAG, PAG
Drafts Plan
Commission
Coordinate Agency Stakeholder Review
Respond to Comments
Review/Revise Plan
Conduct Public Hearing on Proposed Plan
Approve Plan
To: Bassett Creek Water Management Commission
From: Barr Engineering Company
Subject: Bassett Creek WMC 2nd Generation Plan Process
Date: June 16, 2003
Project: 23/27 0512003 060
Memorandum
This memorandum presents the process for the review, revision, and completion of the Bassett Creek
WMC 2nd generation plan
Commission review of draft plan (July 2003 draft)
The draft plan was distributed to the Commissioners, alternates, Technical Advisory Committee, and
Policy Advisory Group for informal review. The draft plan will be discussed at the Commission's
1, meeting. The draft plan will be revised in response to the Commission's comments.
,V4 Seer
First (60 day) formal review of draft plan
This is the first step in the formal review process. The revised draft plan will be sent to the
Commissioners, alternates, member cities, Hennepin County, the state review agencies (Minnesota
Department of Natural Resources, the Minnesota Pollution Control Agency, Minnesota Department
of Agriculture, and the Minnesota Department of Health), the Metropolitan Council, the Minnesota
Board of Water and Soil Resources, and the Hennepin Conservation District for the plan's first (60 -
day) formal review. The Commission may also send the plan to other stakeholders for review.
Respond to Comments after 60 -day review
The Commission must respond in writing to any concerns expressed by the reviewers within 30 days
of receipt of the comments.
Presentations to Cities (Optional)
During or just after the 60 -day review, the Commission could present the draft plan to the cities. This
is an optional task, not required by state laws or rules.
To: Leonard Kremer
From: Karen Chandler
Subject: Bassett Creek WMC 2nd Generation Plan Budget
Date: July 16, 2003
Page: 2
Public hearing on draft plan
The Commission must hold a public hearing on the draft plan between 30 and 45 days after
completion of the 60 -day review.
Second (45 -day) formal review of draft plan
The draft plan will be revised in response to the comments received during the 60 -day review, the
city presentations (if done), and the public hearing. The revised draft plan will then be submitted to
the state review agencies, the Metropolitan Council, the Minnesota Board of Water and Soil
Resources, the Commissioners and alternates for review (city review is not required at this point).
Review comments
The Commissioners will review the comments received during the 45 -day review of the draft plan.
Third/final (90 -day) formal review of draft plan
The draft plan will be revised once more in response to comments and submitted to the Minnesota
Board of Water and Soil Resources for final approval (the Commissioners and alternates will also
receive copies). Towards the end of the review period, but before the BWSR Board approves the
plan, the Commission will need to make an informal presentation to the BWSR subcommittee
regarding the draft plan.
Publish/distribute adopted plan
Once the plan is approved by BWSR, the Commission must adopt the plan, make final edits to the
plan, and then publish and distribute the plan.
P.\23\27\051\plan\July 16 2003 internal memo re plan process.doc
Bassett Creek Park Pond and
Bassett Creek South to Duluth Street
Project
City of Golden Valley
August, 2003
Bonestroo File No. 1438-03-100
Bassett Creek Park Pond and
Bassett Creek South to Duluth St. Project
Table of Contents
Page No.
I. Project Summary ..................................................1
II Issues and Problems............................................3
III. Goals and Options to Address the Issues ............ 5
IV. Discussions and Recommendations ..................11
V. Conclusions and Next Steps..............................14
Attachments.......................................................15
I. Project Summary
This project focuses on a portion of Bassett Creek from Duluth Street to Westbrook
Road in Golden Valley. The City identified several issues of concern in this area, which
are shown on Figure 1:
• Pond provides no water quality benefits to the creek, and requires frequent and
ongoing maintenance
• Several problem areas of erosion and sedimentation have been identified which
affect the water quality of Bassett Creek
• There is a need for water quality treatment for runoff from residential areas and
from the MNDOT site
• Sanitary sewer backup occurs in one house.
Much of the land within the project area is city parkland, and includes an oak woodland
in good condition.
This project included several steps:
• Assessment of conditions and issues in the area
• Location and quantification of water quality and sedimentation issues
• Identification of options that would address the problems in the area
• Meetings with neighbors, MNDOT staff, and the City to discuss the issues and
options, and determine preferred solutions
This report summarizes the issues and problems in the area, identifies the options
developed to address the problems, reports the discussions with stakeholders regarding
the identified options, and identifies the preferred options recommended to address the
problems in the area.
Recommendations include the following:
• Modify the area of the existing pond by building a berm that creates a continuous
creek, and separates the creek from the pond, up to a 5 or 10 -year storm event.
Increase the pond area to the south to compensate for the loss in flood storage.
• Use bioengineering techniques to reinforce the berm and adjacent creek banks.
Plant the pond with native vegetation, and create a buffer of native vegetation
around the pond.
• Complete bioengineering improvements to the identified erosion areas, giving a
priority to areas near the pond and immediately upstream of the pond.
• Work cooperatively with the Minnesota Department of Transportation (MNDOT)
to create a water quality pond immediately west of the MNDOT facility.
Based on these recommendations, the City will complete plans and specifications for
this project, and implement the proposed improvements.
Neigborhood storm sewer
needs pre-treatment
before entering creek.
City inventory identified
erosion areas along
Bassett Creek.
t4t.
70
Created pond is an
ongoing maintenance
problem for the city.
Runoff from MNDOT
property contributing
volume and sediments
creek without pre-treatment.
Oak woodland is in good
condition and includes
large maple trees.
Bassett Creek Pond and
Bassett Creek North to Duluth Street Project
Nt0aMc6
Acatla[a
Feet
150 0 150
j:/gis/marketing/sp999-03-001. apr
II. Issues and Problems
A. Existina Pond
The existing pond within Bassett Creek was created by a local developer during the
1950's. Neighbors who have lived in the area for over 40 years reported that the
developer of the homes adjacent to the pond created it by dredging the creek to form a
"lake" that would be an amenity to homes developed in he area.
Due to its location within the creek channel, the pond demands a high level of
maintenance from the city. As the creek flow enters the pond, it slows dramatically,
dropping its sediment load and forming a delta at the upstream end of the pond.
Unfortunately, this does not provide an overall water quality benefit to the creek. As the
water leaves the creek, it picks up speed and is able to pick up and transport more
sediment in the reach below the pond. The delta within the pond is highly visible and
unsightly, and requires annual removal by the City.
The normal water level in the pond is 854.56'. Modeling completed for this project
indicated that during a ten-year storm event, the pond bounces to 860.02', and in a 100 -
year event it bounces to 860.85.
B. Erosion and Sedimentation
The City of Golden Valley completed an inventory of erosion sites in this portion of
Bassett Creek in 2001 and 2002. Bonestroo staff used this inventory and gathered
additional information on the erosion and sedimentation sites along this portion of the
creek. These sites are identified on Figure 2.
Sedimentation Sites. As noted in the previous section, the pond is an important
sedimentation area (SS -1). Sediment that settles in the pond is the result of both natural
and accelerated stream erosion due to urban conditions. Other important contributors of
sediment to the creek in this area include the following:
• MNDOT property, sites SS -3 and SS -5
• Street drainage: sites SS -2, SS -4, SS -6, and SS -7
Sediment contribution to the creek each year by these sources is estimated as follows:
SS -2: 4 tons/year
SS -3: 18 tons/year
SS -5: 20 tons/year
SS -6: 6 tons/year
The City recently added a Stormceptor treatment chamber to SS -4, which removes most
of the sediment formerly contributed to the creek from this source.
Erosion Sites. Erosion is a constant process along all creeks, as the outside banks are
gradually worn by flowing water, and sediments are deposited along the inner banks. A
combination of factors increase erosion on creeks flowing though urban areas like
Bassett Creek, including increased flows during storm events due to high levels of
impervious surface in the watershed, and changes in vegetation that replace native
deep-rooted vegetation with shallow rooted species such as turf grass that do not help to
3
I I Nr------�
'I I
I > I oN )
p I I7 I I I
o
Westmore Way —
-- � �)t{A• \\ \apo, %% / /
as
_rs'
rh it,
RI
11WW1'
P
'—
—f--------i----
`�
'
�
I
$ I ----------I
I �
II o
I I
®
I I
I I
/
I
II
L�
to o I �
II
cP '
II
I
II
(;I.
II
=1 r —' I'-!1, —
"$
I
"
I
p,
m
;
I
(n
m
I I
I
I I r
II
I I
In
I I
�N--------
JI ------------I
I I 11
I R.L.S.
No. 331 I
I I I
1
8 I
"
$ I
I I I I
II
\ a I
I
I
I
II
IS
I
I I I
i Leet
I
GOLDEN VALLEY MINNESOTA Banestroo st. veal orn�
n �1e Rosene 2335 West Highway 36
W 6 BASSETT CREEK POND Anderlik & St. Peal, MN 55113
EROSION/SEDIMENT SITES Associates Phone: 651-636-9600
s aNJttm Fax: 651-636-1311 o)rt
- .....ee.mee.m.Olox6l�aG. �aYK. wvo[Rx a ♦uWUR K ]eN GR ut. M. IR
hold bank material in place. Figure 2 identifies the primary erosion sites identified by the
City and Bonestroo staff. The most significant sites are within the pond (Erosion Sites A
and B) and just upstream of the pond (Erosion site C). Problems associated with each
site are as follows:
Site A – shoreline erosion from high flows, water fluctuation, saturated soil, and
turf grasses with poor root structure
Site B – shoreline erosion from water fluctuation, saturated soil, and turf grasses
with poor root structure
Site C – stream bank erosion caused by high flows, naturally steep banks, and
poor root structure of bank vegetation
Site D – erosion due to unstable stream channel—a new, straighter channel is
being created in this area, and the oxbow is being abandoned
Site E – stream bank erosion from high flows, naturally steep banks, and poor
root structure of vegetation on banks
Site F – stream bank erosion from concentrated flows at the culvert in this area
and naturally steep banks.
Photos identifying the sedimentation and erosion sites are included on the pages that
follow.
C. Sanitary Sewer Backup Problem
City staff indicated that the home located at 2160 Zane Avenue is subject to sanitary
sewer backups. These problems are related to the sanitary sewer service in this area,
which is a gravity flow system.
Analysis indicated that the difference between the existing walkout elevation of this
home and the sanitary sewer invert elevation is approximately 1.6', which indicates that
sanitary sewer flow backup can occur during high sewer flows or during a surcharge
condition between manholes 1336 and 1427 in this area.
Identification of issues, site survey, and analysis were completed during March -May,
2003. The next section discusses options and recommendations developed to address
these issues.
5
a FE4
O
0 PEA
O
W
w
9%
n
��I
w
9
w
.0
O
95,
24
O
4o
O
400
.O
W
E
.F.(
'tz
W
0
ti
µyl
13
r
.e
f
ti
µyl
13
III. Goals and Options to Address the Issues
A. Project Goals
The City identified the following goals for its efforts to address the issues identified in the
project area:
• Improve water quality protection for Bassett Creek
• Control unnatural erosion occurring along the creek channel
• Minimize maintenance needs in the area
• Prevent future flooding at 2160 Zane
• Use the site as a demonstration area for best management practices
• Create an attractive landscape and improved habitat in the park and for
neighbors along the creek
Bonestroo staff identified a variety of options for meeting the goals in this area, and
discussed the pros and cons of each approach with City Staff, neighborhood residents,
and the City's Environmental Commission. These options are described in the sections
that follow.
B. Pond Options
Two options were developed for modifying the existing pond within the creek. Options
are shown as Pond Option 1 and Pond Option 2 on Figures 3 and 4. Both options
include creation of a berm that will separate the creek channel from the pond area. The
berm will provide protection for the creek in all storm events up to the 10 -year event.
The creek will no longer lose velocity in this area, and thus sediment will no longer drop
in the pond area.
The berm and opposite bank within the new pond will be shaped with gradually slopes,
and planted with native species with deep root structures to bind the soil and stabilize
the slope. Biodegradable coconut fiber mat or biologs would be used with the plantings
to assist in slope stabilization and allow vegetation to take root around the pond. These
options for slope stabilization are illustrated in the Attachments, Figures
Slopes along the creek will require stronger armoring techniques to prevent erosion due
to the velocity of creek flows. These areas would be armored using cribwalls or riprap
with native plantings (Figures in the Attachments). Cribwalls can be constructed
with at almost 1:1 grades, requiring less cut back of banks than the option using riprap
and native plantings (2:1 slope maximum).
Pond Option 1 includes maintaining a pond to the east of the berm. The pond would be
planted with native aquatic species and surrounded by a buffer of native grass and
wildflower plantings. The current pond area will be expanded to the south on park
property, to compensate for flood storage area lost by creation of the berm. This
expanded area may also include a sediment area to trap sediments from SS -2 and SS -
3.
While the pond will continue to provide habitat for ducks and other wildlife that the
neighbors enjoy, it will not be as large or as open as the current pond. It will no longer
0
1
s�7
ppp`}
O 0 ^
i
tn C ` O 3
OD,00 ¢5
OOCVI
a
U)
wo
z
Z o
a-
y
wo
>: w
W v O
Q W a
V)
z m
1/3801100FO1.DW0
SMCEf -.m
F{G 3
a
El
o
F
202
WOw
O p
a�
�ti1
FF��
IIOy1
UDLLZJJ
maw
�
In, pvi
�m6Vl u
Wig-
w
� O
GI M MOS
l0 q
n tD
-,MD y
O 0 Z D M
S f 1D
.�
7 � to - d
10 y :3 10 ,
a a (D
y, L c x b
U) M Nam
N
O 0 ^
i
tn C ` O 3
OD,00 ¢5
OOCVI
a
U)
wo
z
Z o
a-
y
wo
>: w
W v O
Q W a
V)
z m
1/3801100FO1.DW0
SMCEf -.m
F{G 3
Wo
�.ol Z
Zo
,' C a' N
• ' ` Y z
_w o
W v o
\ J
W a
Z U)
Z m
J
Z
V �
43801100FO1.DWC
SNEE.T NUYBEn
FIG 4
z
va.0
Sao
ci
mop d
FFo
�IIaJJg
z �
�+
i
o
S
Mai M O
O rnz�niDi
�
V
La v
Lnc
x b
{A m Lf) =
N
a
d
Wo
�.ol Z
Zo
,' C a' N
• ' ` Y z
_w o
W v o
\ J
W a
Z U)
Z m
J
Z
V �
43801100FO1.DWC
SNEE.T NUYBEn
FIG 4
be continuously flushed by creek flows, but will depend on storm runoff for water and
flushing. The pond will be relatively shallow, and ringed by vegetation. The City will also
require that an unmown vegetated buffer be maintained around the pond. These
changes will improve the habitat quality of the pond, but will change its appearance.
Pond Option 2 suggests filling the pond area to the east of the berm, and planting with
native grasses and wildflowers to create a meadow. Since the current pond provides no
water quality benefit to the creek, this will not have a negative effect on the water quality
of Bassett Creek. This option would eliminate the current habitat and aesthetic elements
of the pond, but would return the area to its pre -pond condition, and may be more
acceptable to those that are concerned about the look of a highly vegetated pond,
potential algae growth, mosquitoes, or other potential negative aspects of the pond
suggested in Option 1. It would also be a very low maintenance option for the City.
MNDOT Pond. The MNDOT site contributes a high amount of sediment to Bassett
Creek, and includes no water quality treatment facility at present. A sizeable flat area
exists immediately west of the MNDOT property, between the fence and existing trail.
The area is currently covered with vegetation of low value—non-native grasses, shrubs
and small trees.
The area west of the property offers an opportunity to create a pond that would capture
sediment from the MNDOT property and remove this sediment source from the creek.
The proposed pond is shown in Figure 5. The pond would capture runoff from the
existing pipe at SS -5, which collects storm water from about 13 acres of the site. The
pipe at SS -3 could be rerouted to run to the pond as well --this pipe collects storm water
from about 0.7 acres. The primary advantage of re-routing the pipe at SS -3 would be
the opportunity to combine all of the site runoff from the MNDOT site into one outfall to
Bassett Creek. Relocating this runoff would also remove the existing outfall from the
neighborhood pond, and relocate it to an area under MNDOT control.
The proposed pond maximizes the size available in this location—it is approximately .4
acres in size at the normal water level. As currently size, the pond would provide
approximately 84% removal of suspended sediments that currently leave the site. If the
pipe at SS -3 is not re-routed to the pond, the difference is negligible, since this collects
drainage from only a small portion of the site.
The current outfall to the creek from SS -5 is in very poor condition, probably due to salt
exposure. This outfall should be replaced, and its condition suggests that the entire pipe
may need to be replaced. It may be best to complete this work at the same time that the
area is disturbed for pond construction.
The pond area is currently within the City's Bassett Creek Park. The City proposed
creation of the pond on its property, to be maintained by MNDOT.
C. Shoreline Stabilization
Shoreline stabilization at erosion sites along the channel can be accomplished using a
variety of techniques, such as Vegetated Geogrids, Crib Walls, and Rip Rap with
Plantings (illustrated in Figures 1-5 in the Attachments). Each technique has pros and
cons for use on this site. For example:
E
fn�� � ~ �•r_I � .: red �::.. I _.. � -. r
own etegt
� � � � , •tea '• s
TF77771
• � ; � . ' sue _ � � ,f� . r„�r;" a t9��
��=) in � l a _ .. -_. � ;� -.�. %� •
9}
EYI88
— r
- f > a`�h • e L
IL
nIgA,
•�M,t
WL
_ 0.168 WeetbPook Road !
Atli a .
• Geogrids are typically the most expensive technique among the three
illustrated (up to $300 per lineal foot) due to high labor inputs. Rip Rap
with Plantings is usually the least expensive technique due to lower labor
requirements.
• Crib walls and vegetated geogrids can be constructed with less cut back
of existing slopes required for stability. They may be constructed on
nearly 1:1 slopes or 1.5:1 slopes.
• The Rip Rap with Plantings technique would require some cut back of
existing eroded slopes to a 2:1 slope or shallower, thus reducing the area
of parkland.
• All the bioengineering options share the advantages of natural
appearance over older stabilization techniques.
• Vegetation included in these options helps to slow stream velocities and
encourages the deposition of sediment along stream banks.
D. Sanitary Sewer Backups at 2160 Zane
Several options were identified for addressing the sanitary sewer issue at 2160 Zane.
Based on observation that existing private ejector pumps used on other homes in this
area are working well, it was agreed that the best solution to improve the sanitary sewer
service to this home is to consider an ejector pump system and eliminate the gravity
sewer with a gate value. A variety of options exist for installing the ejector pump system.
These options will be reviewed with the property owner. Additional information regarding
solutions to the flooding problem is included in the Appendix.
11
IV. Discussions and Recommendations
A. Neiahborhood Meetin
A neighborhood meeting was held on June 16, 2003 at Golden Valley City Hall. Over 50
percent of the residents in the immediate neighborhood attended the meeting.
Consultants and staff presented a summary of issues and problems in the area, and
described the options for the pond and creek in detail. Both the pros and cons of each
option were presented. A lively discussion session with residents followed, with
residents providing additional information on creek conditions and problems, as well as
insights into the history of the area.
The residents reached a consensus on preferences for improvements in the area. Their
recommendations included the following:
• Residents preferred Pond Option 1, which retains the pond east of the
berm, rather than the Meadow Option.
• Residents suggested that the pond could be expanded to the south, on
park property.
• Neighbors favored the addition of a water quality pond near the MNDOT
property, rather than continuing or expanding the storm water cleaning
function of the existing pond.
• Residents indicated concerns that the pond overflow be carefully
controlled, so that slopes are not eroded during large storm events.
• Residents said that significant trees in the park should not be lost due to
creation of the ponds.
• Residents near Erosion Site D indicated a preference to keep the newer,
straighter creek section rather than routing the creek to the oxbow, so that
their views of the creek and wildlife are preserved.
• Residents requested that views of the creek be considered as the City
plans for erosion control at the sites identified on the creek. Cutting back
slopes as a part of constructing these improvements may help to maintain
views.
• Neighbors expressed concerns about the maintenance of native
vegetation to be installed with improvements. City staff indicated that the
City contracts with a company that specializes in vegetation restoration
for maintenance of such areas.
• Neighbors requested that a second meeting be held in August, to review
the plans developed for the area, and that plans be provided in an 8-1/2
by 11 format that could be shared with residents who are unable to attend
the meeting.
B. Meetings with MNDOT
City and Bonestroo staff met with MNDOT staff to discuss water quality issues in creek
area. Staff presented the analysis identifying the MNDOT facility sediment contribution
to the creek, existing conditions in the area, and options for improvements proposed by
12
the City, including the potential pond near the MNDOT property. Staff also provided a
costs estimate for the proposed pond (Table 1).
MNDOT staff agreed that the pond would be valuable in protecting the water quality of
Bassett Creek, and that the cost was reasonable for the improvement that could be
realized. They identified some potential options for using MNDOT resources to fund this
improvement in cooperation with the City project in the area. These included the
Municipal Cooperative Agreement Program and MNDOT Metro District Program
Committee. They agreed to present the project, including it's potential costs and
benefits, to potential funding sources.
The MNDOT staff also identified the following issues to be addressed as final plans for
the project are developed:
• Is the proposed MNDOT pond an allowed use on City park property? Some
types of park acquisition funds or easements could prohibit this use. City staff
and attorney will research this issue.
The plans and cost estimate should include a gate and paved access for
MNDOT equipment that would maintain the site.
The City and MNDOT will need to develop a cooperative agreement for
financing and maintaining this improvement.
13
IV. Conclusions and Next Steps
Based on the analysis and discussions completed for this project, the following
improvements are recommended to address the problems identified in the area and
meet the City's goals:
• Modify the area of the existing pond by building a berm that creates a continuous
creek, and separates the creek from the pond, up to a 5 or 10 -year storm event.
Increase the pond area to the south to compensate for the loss in flood storage.
• Use bioengineering techniques to reinforce the berm and adjacent creek banks.
Plant the pond with native vegetation, and create a buffer of native vegetation
around the pond.
• Complete bioengineering improvements to the identified erosion areas, giving a
priority to areas near the pond and immediately upstream of the pond.
• Work cooperatively with the Minnesota Department of Transportation (MNDOT)
to create a water quality pond immediately west of the MNDOT facility.
Construction plans and specifications will be completed during the summer and early
fall, 2003. Construction is expected to occur during fall and into winter, 2004. Plantings
and any final construction is anticipated to be completed during spring, 2004.
14
Attachments
15
�iTION � +���iL MfCT
in R®ssno
'� Assoc6at-s
Of-noH L�
c slacasna
6t�,0CmhD lIAr/EY
oF-n Dt—i 3: VbIIETAT ETD
CPEO G, a' T.D
fl®nazlra®
®amus
Engineers & Mchit&--ts
51�MP?5 (Pflo"5, /q.tr.>toP- 5aL...�
�fmktt,-.
Tmr,j4-- V 1 Y S &/�-A P� 1 V"Ati[,,
'Fb�—
Rossne
C Andarlik gc
"'� to L-0 &Ih
WIL4,0W STA , i
I)NVETv
`rP ww ls4 PIF -
v E�A ri T?-� N -►v c --z-7
6T'Tlory 5 .
All\] E
r�
WILLO 00 " T,Vr
�kvl DE ovWSQDr'i
G T7? -D L. DN z2L-0 fr--
WIU'O W t)TAl
ik-N1,► a
0-9— L-7�,e2s b -p -j
T LAI\� —F� �\j (�,, Z�-7
PABonaserco
INDS R®ssna
AnderEk e,
Engineer. & Axhif&fs
JA Bonestroo
Rosene
Anderlik &
Associates
Engineers & Architects
May 22, 2003
Mr. Jeff Oliver
City of Golden Valley
7800 Golden Valley Road
Golden Valley, MN 55427-4588
Bonestroo, Rosene, Anderlik and Associates, Inc. is an Affirmative Action/Equal Opportunity Employer
and Employee Owned
Principals: Otto G. Bonestroo, P.E. • Marvin L. Sorvala, P.E. • Glenn R. Cook, P.E. • Robert G. Schunicht, P.E.
Jerry A. Bourdon, P.E. • Mark A. Hanson, P.E.
Senior Consultants: Robert W. Rosene, P.E. • Joseph C. Anderlik. P.E. • Richard E. Turner, PE. • Susan M. Eberlin, C.P.A.
Associate Principals: Keith A. Gordon, PE. • Robert R. Pfefferle, P.E. • Richard W. Foster, PE. • David O. Loskota, P.E.
Michael T. Rautmann, P.E. • Ted K. Field, P.E. Kenneth P. Anderson. P.E. • Mark R. Rolfs, PE. • David A. Bonestroo, M.B.A.
Sidney P. Williamson, P.E.. L.S. • Agnes M. Ring, M.B.A. • Allan Rick Schmidt. P.E. • Thomas W. Peterson, PE.
James R. Maland, P.E. • Miles B. Jensen, PE. • L. Phillip Gravel III, P.E. • Daniel J. Edgerton, P.E. • Ismael Martinez, P.E.
Thomas A. Syfko, P.E. • Sheldon J. Johnson • Dale A. Grove, P.E. • Thomas A. Roushar, P.E. • Robert J. Devery, P.E.
Offices: St. Paul, St. Cloud, Rochester and Willmar, MN • Milwaukee, WI • Chicago, IL
Website: www.bonestroo.com
Re: Bassett Creek Park — Sanitary Sewer Services
Our File No. 1438-03-100
Dear Jeff:
Attached are plan/profile sheets (C401, C402) for the existing sanitary sewer in Zane Avenue, Westbrook Road
and Vale Crest Road in the Bassett Creek Park Area. We have noted the existing sanitary sewer profile, critical
walkout elevations and homes with existing private sanitary sewer ejector pumps along with the year they were
hooked up/connected. The existing private ejector pump information is based on your research as noted in your
May 2, 2003 email. Based on our research and reviewing walkout elevations, it appears the home at 2155 Vale
Crest Road may also have an ejector pump.
The purpose of our sanitary sewer review for this area is to document the sanitary sewer system and explore
options to improve the sanitary sewer service at 2160 Zane Avenue. Presently the sanitary sewer service is
gravity, however a gate valve is located on the service line. The purpose of the gate valve is that during high
sewer flows, the gate valve can be closed to prevent sewer back-up into the home. The difference between the
existing walkout elevation and the sanitary sewer invert elevation is approximately 1.6', which indicates sanitary
sewer flow backup could occur during high sewer flows or during a surcharge condition between MH 1336 and
1427.
At our meeting on May 2, 2003, we discussed many options how conditions could be improved to provide
sanitary sewer service to this area. However, based on our discussion and the fact the existing private ejector
pumps are located in this area and have been working fine, it was agreed that the best solution to improve the
sanitary sewer service at 2160 Zane Avenue is to also consider an ejector pump system and eliminate the gravity
sewer with gate valve. Different options are available based on how the ejector pump system could be installed
dependent on the property owner preference. It's suggested the different options be reviewed with the property
owner in accordance with City policy.
Please review and we can discuss if additional study is required.
Yours very truly,
Iq'//
Mark A. anson
MAH:crw
Copy: Jeannine Clancy, Al Lundstrom, Merlin Thorn, Tom Klatte — Golden Valley
Sherri Buss, John Smythe
2335 West Highway 36 ■ St. Paul, MN 55113 ■ 651-636-4600 ■ Fax: 651-636-1311