HomeMy WebLinkAboutEXECUTIVE SUMMARY
Barr Engineering Company
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL
DRAFT\Edina_SWMP_FINAL_v1.docx 1-1
1.0 Executive Summary
The City of Edina Comprehensive Water Resource Management Plan is comprised of the Executive
Summary, Section 1, and fifteen additional sections, which are described as follows:
Section 2: Introduction—presents background information regarding the city, general
watershed information, and plan purposes.
Section 3: Policies for Stormwater Management—presents background information, goals,
policies and design standards covering runoff management and flood control, water quality
management, erosion and sediment control, wetlands, floodplain management, recreation, habitat
and shoreland management, groundwater, the City’s education goals, and National Pollutant
Discharge Elimination System (NPDES) considerations.
Section 4: Methodology for Modeling—describes the data, methods and assumptions used for
the stormwater analyses.
Sections 5 through 14 (Watershed Descriptions and Recommendations)—describes the
general drainage area, drainage patterns within the area, the stormwater system analysis and
results, and implementation recommendations for each of the following ten major drainage areas
in the city: Nine Mile Creek- North, Nine Mile Creek- Central, Nine Mile Creek- South, Lake
Cornelia/Lake Edina/Adam’s Hill, Nine Mile South Fork, Southwest Ponds, T.H. 169 North,
Northeast Minnehaha, Southeast Minnehaha, and Northwest Minnehaha.
Section 15: Issues and Implementation Program—describes the significant components of the
City’s CWRMP implementation program, including its NPDES Phase II MS4 permit, ,specific
requirements of the NMCWD and MCWD, financial considerations, ordinance implementation
and official controls, and implementation priorities.
Section 16: Wetlands—Discusses the wetland inventories completed for the City of Edina and
the assessment methodologies and results.
1.1 Stormwater Management Goals & Policies
1.1.1 Runoff Management & Flood Control (Section 3.1)
1. No flow rate increases in already overtaxed stormwater systems.
2. Place high priority on providing 100-year level of protection for the City’s stormwater
system.
3. Require 10-year level of service for new stormwater systems and for existing systems as
opportunities arise.
Barr Engineering Company
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL
DRAFT\Edina_SWMP_FINAL_v1.docx 1-2
4. For new development and redevelopment, peak flow rates will be limited in accordance with
the applicable rules of the Nine Mile Creek Watershed District and/or Minnehaha Creek
Watershed District.
5. Adopt and implement a stormwater management ordinance reflecting the policies and design
standards detailed in Section 3.1.
1.1.2 Water Quality Management (Sections 3.2 and 3.3)
1. Modify City review, permitting, and enforcement processes for construction activities to
ensure water quality goals are met.
2. Heighten community awareness of water quality management through education and training.
3. Manage City water resources so that the beneficial uses of streams, wetlands, ponds, and
lakes remain available to the community.
4. Work with the adjacent municipalities to encourage upstream pollutant reduction in areas
closer to the source of such pollutants.
5. Encourage use of regional detention areas as opposed to individual on-site detention to
reduce flooding, control discharge rates, and provide for water quality management.
6. As required by the Nine Mile Creek Watershed District and Minnehaha Creek Watershed
Districts, stormwater retention is required in locations where soil conditions permit and
where groundwater supplies will not be impacted.
7. Adopt and implement a stormwater management ordinance reflecting the water quality
management standards detailed in Section 3.2.3 and the erosion and sediment control policies
detailed in Section 3.3.
8. Work with the MPCA, Nine Mile Creek Watershed District, and Minnehaha Creek Watershed
District to implement the recommendations and/or requirements of existing or future Total
Maximum Daily Loads (TMDLs) throughout the city.
9. Require erosion and sediment controls and submittal of erosion and sediment control plans
for proposed construction activities.
10. Erosion and sediment controls shall conform to the requirements of the Nine Mile Creek
Watershed District or Minnehaha Creek Watershed District, depending on project location.
11. Direct that entities proposing construction projects that disturb more than 1 acre of land will
need to apply for coverage under the MPCA’s General NPDES Construction Stormwater
Permit.
1.1.3 Wetland Protection (Section 3.4)
1. Achieve no net loss of wetlands, including acreage, functions, and values.
2. Discourage wetland alteration. Unavoidable wetland alterations must be mitigated in
conformance with the Wetland Conservation Act (WCA) requirements and the requirements
of the Nine Mile Creek Watershed District or Minnehaha Creek Watershed District, and must
be guided by the following principles, in descending order: avoid the impact, minimize the
Barr Engineering Company
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL
DRAFT\Edina_SWMP_FINAL_v1.docx 1-3
impact, rectify the impact, reduce or eliminate the impact over time, and compensate for the
impact.
3. Work in conjunction with the local government units (LGU) responsible for administering the
Wetland Conservation Act in the City of Edina, the Nine Mile Creek Watershed District and
the Minnehaha Creek Watershed District, on issues pertaining to wetland alterations within
the city boundary.
4. Maintain and periodically update the wetland inventory data and the wetland management
classifications provided in this plan.
5. Seek to restore previously existing wetlands and enhance existing wetlands.
6. Provide buffer zones of native vegetation, where feasible, around ponds and wetlands to
provide habitat. The City will work with the Nine Mile Creek Watershed District and
Minnehaha Creek Watershed District to educate the public regarding wetland protection and
the importance of creating and maintaining vegetative buffers. Land use and property
ownership may limit the ability to provide buffer zones.
7. Encourage the minimization of water level fluctuations (bounce), where feasible, in wetlands
or detention basins to prevent adverse habitat changes.
8. Involve the appropriate regulatory agencies (MPCA, U.S. Army Corps of Engineers, and the
MnDNR) in the planning of any proposed water quality or flood control facilities identified
in this plan that may be located within a wetland.
1.2 Problems, Issues and Potential Solutions
This section summarizes the City’s 2010-2019 water resources implementation program, and
potential stormwater management improvements identified in Sections 5 through 15 of the plan.
1.2.1 Water Resources Implementation Program
This plan serves as a master plan for the City’s water resources management and storm drainage
system. The City will work with residents to implement structural (capital) improvements and non-
structural programs to address existing water resource problems within the city and to prevent future
problems from occurring. The implementation program identifies and prioritizes the programs and
improvements, and provides cost estimates for budgeting purposes. Table 1.1 presents the City’s
water resource-related implementation program for 2010-2019, which includes the City’s non-
structural (administration) programs and structural (capital) improvement program.
1.2.2 Runoff Management and Flood Control
The hydrologic and hydraulic modeling analyses of the current stormwater system identified several
areas throughout the City where the desired 100-year level of protection may not be provided. These
problem areas and potential solutions are discussed in detail in Sections 5 through 14, and are
summarized and prioritized in Table 1.2. In addition to evaluating the level of protection provided
by the current stormwater system, the level of service provided was also evaluated. From this
Barr Engineering Company
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL
DRAFT\Edina_SWMP_FINAL_v1.docx 1-4
analysis, it was determined that the storm sewer throughout many areas of the city is not currently
providing the desired 10-year level of service. The areas where the storm sewer does not offer
sufficient capacity and street flow occurs during a 10-year frequency event are depicted in figures in
Sections 5 through 14. The capacity of these storm sewer systems should be evaluated and upgraded
as opportunities arise.
1.2.3 Water Quality Management
To protect the water quality of Nine Mile Creek and Minnehaha Creek, the effectiveness of the
stormwater system in removing stormwater pollutants such as phosphorus was evaluated and water
quality management recommendations have been made for potential pond upgrades throughout the
city. These recommendations are discussed in Sections 5 through 14, and are summarized and
prioritized in Table 1.2.
Barr Engineering Company 1-5
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL DRAFT\Edina_SWMP_FINAL_v1.docx
Table 1.1 Water Resources Implementation Program
Project Name /
Location Description Proposed Improvement
Cost
Estimate1 ($)
Proposed
Year3 Funding
Source
Plan Amendments This Water Resources Management Plan
may need to be amended periodically. This plan will be amended as required. As Required As Required SW Utility
Plan Update/Revision
This Water Resources Management Plan
will expire in 2019 and need to be
updated/revised to be consistent with WMO
plans and policies and state and federal
rules.
This Plan will be updated to maintain
compliance with state and federal rules and
WMO policies.
100,000 2018-2020 SW Utility
City-wide education and
resident involvement
program
Implement the City’s Education Program
including educational and outreach tasks
called out in the City’s SWPPP
Maintain the education program to educate
residents about the Plan and about various
water related issues.
10,000/yr Ongoing SW Utility
Illicit discharge detection
and elimination
Continue implementation of the SWPPP
Illicit discharge detection and elimination
tasks
Inventory, mapping, inspection,
enforcement and education. City Staff Ongoing SW Utility
Develop Interactive GIS
water resources web
mapping tool
Development of a web-based mapping
system for sharing water resource
information with the interested public
Water resources information will be more
easily accessible to interested public via the
City’s website.
11,000 2009-2010 SW Utility
Maintenance of Interactive
GIS water resources web
mapping tool
Annual updates and maintenance activities
for interactive GIS web mapping tool, as
needed.
Web mapping tool will have continued
functionality and reflect most up-to-date
information available.
3,000 Ongoing SW Utility
Illicit discharge ordinance
review
Review existing City ordinances and
develop/adopt an illicit discharge ordinance,
as necessary.
City ordinances consistent with illicit
discharge requirements of NPDES Phase II
MS4 General Permit
City Staff Ongoing SW Utility
Construction site
stormwater runoff control
Maintain construction site stormwater runoff
control program and SWPPP tasks
Plan review, inspection, enforcement and
education City Staff Ongoing SW Utility
Post construction
stormwater management
Maintain the post construction stormwater
management and SWPPP tasks Design standards and review, education City Staff Ongoing SW Utility
BMPs–Housekeeping,
Street Sweeping, & Storm
Drainage System
Maintenance
Maintain the City’s Pollution prevention –
Good housekeeping practices and related
SWPPP tasks including Street sweeping and
system maintenance.
Street sweeping, structure clean-out, City
facility operations and maintenance and
training, inspections and recording with
concentration of efforts in target areas.
City Staff Ongoing SW Utility
Storm Drainage System
Inventory
Continue inventorying storm sewers,
manholes, catch basins, etc.
Complete inventory. Tie inventory into the
City's GIS and CityWorks system. City Staff Ongoing SW Utility
Barr Engineering Company 1-6
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL DRAFT\Edina_SWMP_FINAL_v1.docx
Project Name /
Location Description Proposed Improvement
Cost
Estimate1 ($)
Proposed
Year3 Funding
Source
Updates to Hydrologic and
Hydraulic Modeling
Annual updates to City’s stormwater
management system modeling to reflect
infrastructure improvements
Current, up-to-date modeling results. 10,000/year
Impaired Waters Tracking
and Review
Monitor impaired waters list and respond
with review and implementation as needed
per the SWPPP.
The City will remain fully informed and
responsive to impaired waters issues. City Staff Ongoing SW Utility
Nondegradation Report
Follow-up City-wide loading assessment
Determine pollutant load reduction
necessary for nondegradation of water
bodies
5,000 TBD SW Utility
Annual SWPPP update and
meeting
Make any needed updates to the City’s
SWPPP and hold an annual public meeting
to receive public input.
Involve residents in water resource issue
development and implementation tasks. City Staff Ongoing SW Utility
BMPs - Sedimentation Pond
Maintenance
Sedimentation ponds require frequent
cleaning and maintenance.
Develop and implement a program to
inspect, clean and maintain sedimentation
and water quality ponds and lakes.
2,800,000 /
10 years Ongoing SW Utility
Miscellaneous Drainage
Improvements Miscellaneous Drainage Improvements Miscellaneous Drainage Improvements 23,000,000/
10 years Ongoing SW Utility
Infiltration and Inflow
reduction
Reduce the amount of infiltration and inflow
to the sanitary sewer system
Reduce the amount of infiltration and
inflow to the sanitary sewer system 200,000/year Ongoing SW Utility
Participation in Nine Mile
Creek Chloride TMDL
Participate in stakeholder process for Nine
Mile Creek Chloride TMDL City Staff 2009-2010 SW Utility
Implementation of Nine
Mile Creek Chloride TMDL
Implement the requirements of the Nine
Mile Creek Chloride TMDL To be determined TBD 2010-2020
SW Utility/
NMCWD/
Grant Funding
Participation in Minnehaha
Creek/Lake Hiawatha
TMDL Development
Participate in stakeholder process for
Minnehaha Creek/Lake Hiawatha TMDL
development
City Staff 2009-2012 SW Utility
Implementation of
Minnehaha Creek/Lake
Hiawatha TMDL
Implement the requirements of the
Minnehaha Creek/Lake Hiawatha TMDL
loading allocation and implementation plan.
To be determined TBD 2012-2020
SW Utility/
MCWD/
Grant Funding
Participation in the
NMCWD Lake Cornelia
Use Attainability Analysis
(UAA) development
Partner with the NMCWD to evaluate
potential remedial measures for improving
the water quality of Lake Cornelia.
City Staff 2009-2010 SW Utility
Barr Engineering Company 1-7
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL DRAFT\Edina_SWMP_FINAL_v1.docx
Project Name /
Location Description Proposed Improvement
Cost
Estimate1 ($)
Proposed
Year3 Funding
Source
Participation in Lake
Cornelia TMDL
Development
Participate in stakeholder process for Lake
Cornelia TMDL City Staff 2013-2018 SW Utility
Implementation of
recommendations from the
NMCWD Lake Cornelia
UAA and Lake Cornelia
TMDL
Partner with the NMCWD to implement the
recommended remedial measures to improve
the water quality of Lake Cornelia
To be determined TBD 2010-2020
SW Utility/
NMCWD/
Grant Funding
Participation in Lake Edina
TMDL Development
Participate in stakeholder process for Lake
Edina TMDL City Staff 2013-2018 SW Utility
Implementation of Lake
Edina TMDL
Implement the requirements of the Lake
Edina TMDL loading allocation and
implementation plan.
To be determined TBD 2018-2020
SW Utility/
NMCWD/
Grant Funding
Implementation of
recommendations from the
Draft NMCWD Mirror Lake
UAA
Partner with the NMCWD to implement
recommended remedial measures to improve
the water quality of Mirror Lake
To be determined TBD
SW Utility/
NMCWD/
Grant Funding
Implementation of
recommendations from the
Draft NMCWD Arrowhead
and Indianhead Lakes UAA
Partner with the NMCWD to implement
recommended remedial measures to improve
the water quality of Arrowhead and
Indianhea Lakes
To be determined TBD
SW Utility/
NMCWD/
Grant Funding
Minnehaha Creek Reach 14
Stream Restoration Stream Improvement Project Streambank stabilization, in-stream habitat
enhancement, and buffer enhancement. MCWD
Zoning Ordinance
Revisions
Revise zoning ordinance to include wetland
management aspects. City Staff 2009-2010 SW Utility
Stormwater Management
Ordinance Development
Develop and implement stormwater
management ordinance reflecting the
policiesand design standards detailed in the
CWRMP.
City Staff 2010-2012 SW Utility
1 TBD – To be determined
Barr Engineering Company 1-8
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL DRAFT\Edina_SWMP_FINAL_v1.docx
Table 1.2 Potential Implementation Activities (including Capital Improvements)
Project Name/Location Description Proposed Improvement Priority
1
Nine Mile Creek-North
Subwatershed ML_19 (505, 509, 513 Tyler Ct) Flooding problem Upgrade to larger pipe. C-40
Suwatershed HL_2 (Hawkes Drive) Flooding problem Construction of overflow swale between homes C-41
Subwatershed HL_18 (5711 & 5717 Grove St) Flooding problem Upgrade to larger pipes C-22
Subwatershed HL_25 (5516 & 5520 Dundee Rd) Flooding problem Perform detailed field survey. Additional pumping capacity may
be required at lift station. E-3
Subwatershed MD_22 (6009 Leslie Ln) Flooding problem Upgrade to larger pipes. C-39
Subwatershed MD_28 (5316 Schaeffer Rd) Flooding problem Maintain road overflow and positive overflow swale. C-18
Subwatersheds NMN_90, NMN_23 (Fountain Woods
Apartments) Flooding problem Privately owned drainage system. Notify owners of flood
potential. E-2
Pond MD_3 (Bredesen Park, east of parking area) Water Quality Improvement Excavate to remove accumulated sediment. C-12
Pond MD_15 (Sun Road) Water Quality Improvement Provide additional 0.3 acre-feet of dead storage volume. C-10
Pond NMN_24 (Between Waterford Ct and Habitat Ct) Water Quality Improvement Increase pond depth. C-7
Pond NMN_27 (Northeast of T.H. 62 & T.H. 169) Water Quality Improvement Provide additional 1.4 acre-feet of dead storage volume. C-8
Pond NMN_49 (West of 5521 Malibu Drive) Water Quality Improvement Provide additional 0.2 acre-feet of dead storage volume. C-11
Nine Mile Creek- Central
Manhole 457 (6005 & 6009 Crescent Dr) Flooding problem Construction of a positive overflow channel. C-38
Subwatershed IP_4 (Cherokee Trail & Gleason backyard
depression area) Flooding problem Work with homeowners to evaluate construction of a low level
outlet from landlocked depression. C-37
Subwatershed NMC_80 (5339 West 64th St) Flooding problem Upgrade to larger pipes at Ridgeview Dr and Valley Ln. C-36
Subwatersheds NMC_86, NMC_120 (Valley View Rd &
Hillside Rd) Flooding problem Upgrade to larger pipe. C-35
Subwatersheds NMC_71, NMC_103 (West 66th St & Naomi
Dr) Flooding problem Provide additional outlet capacity from backyard depression area
through gravity outlet system (1) or pumped outlet (2). C-44
Barr Engineering Company 1-9
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL DRAFT\Edina_SWMP_FINAL_v1.docx
Project Name/Location Description Proposed Improvement Priority
1
Subwatershed NMC_106 (6712, 6716, 6720 Ridgeview Dr) Flooding problem Installation of a gravity storm sewer system at backyard
depression. C-34
Subwatershed NMC_107 (6808, 6812, 6816, 6820
Ridgeview Dr) Flooding problem Installation of a gravity storm sewer system at backyard
depression. C-33
Lake Cornelia/Lake Edina/Adam’s Hill
Subwatersheds NC_62, NC_3 (Swimming Pool Pond/ North
Lake Cornelia) Flooding problem Upgrade pipe and outlet structure. C-31
Subwatershed NC_11 (6312, 6316, 6321, 6329 Tingdale
Ave) Flooding problem No recommendation at this time. Further analysis required. E-9
Subwatersheds NC_40, NC_26 (St. Johns/Ashcroft & West
64th St) Flooding problem Installation of additional pipe to drain T.H. 62 median ditch and
prevent upstream flooding. C-21
Subwatersheds NC_86, NC_97, NC_99 (Barrie Rd &
Heritage Dr) Flooding problem No recommendation at this time. Reevaluation of T.H. 62
system will be required. E-10
Subwatershed NC_88 (York Ave & West 64th St) Flooding problem Increase pump capacity. Adjust pump on/off elevations. E-1
Subwatershed NC_132 (T.H. 62 at France Ave) Flooding problem No recommendation at this time. Reevaluation of T.H. 62
system will be required. E-14
Subwatershed NC_135 (Parnell Ave & Valley View Rd) Flooding problem No recommendation at this time. Further analysis required. E-13
Subwatersheds LE_53, LE_7, LE_10 (Hibiscus Ave) Flooding problem Construct positive overflow swale. C-31
Pond LE_38 (West of Lake Edina) Water Quality Improvement Provide additional 1.4 acre-feet of dead storage volume within
MnDOT right-of-way C-9
Nine Mile Creek- South
Subwatershed CL_51 (7001 & 7025 France Ave) Flooding problem No recommendation at this time. E-11
Pond SP_1 (Border Basin - West of Minnesota Dr & West
77th St) Water Quality Improvement Provide additional 21.5 acre-feet of dead storage volume. C-2
Subwatershed NMS_1 (Southwest quadrant of the T.H. 100
& West 77th St interchange) Water Quality Improvement Construct water quality basin. C-1
Ponds NMS_72, NMS_74 (Fred Richards Golf Course) Water Quality Improvement Increase pond depths. C-6
Pond NMS_76 (Fred Richards Golf Course) Water Quality Improvement Provide additional 2.5 acre-feet of dead storage volume. C-4
Pond NMS_104 (Fred Richards Golf Course) Water Quality Improvement Provide additional 0.2 acre-feet of dead storage volume. C-5
Barr Engineering Company 1-10
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL DRAFT\Edina_SWMP_FINAL_v1.docx
Project Name/Location Description Proposed Improvement Priority
1
Nine Mile South Fork
Subwatershed AH_31 (6309 Post Lane) Flooding problem Construction of two control structures to restrict flow through
the existing storm sewer system. C-42
Subwatershed NMSB_62 (Braemar Golf Course) Flooding problem No recommendation at this time. Further analysis required. E-12
Subwatershed NMSB_70 (7009 & 7013 Sally Ln Backyard
Depression Area) Flooding problem Perform detailed field survey. Positive overflow swale may be
necessary. E-7
Subwatersheds NMSB_83, NMSB_84 (Paiute Pass & Sally
Ln) Flooding problem Perform detailed field survey. Positive overflow swale from
backyard depression may be necessary. E-8
Ponds NMSB_3, NMSB_2 (Braemar Golf Course) Water Quality Improvement Provide additional 1.2 acre-feet of dead storage volume. C-13
Pond NMSB_7 (Braemar Golf Course) Water Quality Improvement Increase pond depth. C-15
Pond NMSB_12 (Braemar Golf Course) Water Quality Improvement Regular maintenance. C-3
Pond NMSB_85 (Braemar Golf Course) Water Quality Improvement Provide additional 1.2 acre-feet of dead storage volume. C-16
Pond NMSB_86 (Braemar Golf Course) Water Quality Improvement Provide additional 0.15 acre-feet of dead storage volume. C-14
Southwest Ponds
Subwatershed SWP_14 (7411 Coventry Way) Flooding problem Installation of flapgate. C-17
Subwatershed SWP_46 (7317 Cahill Road) Flooding problem No recommendation at this time. Further analysis required. E-6
Subwatershed NM494_4 (7709 Stonewood Court) Flooding problem Upgrade to larger pipes. C-43
Northeast Minnehaha Creek
White Oaks Landlocked Area Flooding Analysis and
Feasibility Study (if necessary) Flooding problem
Complete stormwater analysis to determine potential flooding
impacts of 100-year snowmelt event to structures surrounding
the landlocked areas
E-16
Subwatershed MS_3 (4300, 4214, & 4212 Branson St) Flooding problem Install catchbasin in backyard depression and upgrade to larger
pipe. C-24
Subwatershed MS_7 (4140 & 4150 West 44th St) Flooding problem Provide additional storage capacity in backyard depression. C-25
Subwatershed MS_17 (4308 France Ave) Flooding problem Work with homeowners to evaluate installation of gravity system
to drain backyard depression area. C-23
Subwatershed MS_40 (4000 West 42nd St and 4100, 4104,
& 4108 France Ave) Flooding problem Implement recommendations of the 2006 Weber Park Pond
Feasibility Study C-45
Barr Engineering Company 1-11
P:\Mpls\23 MN\27\23271072 Edina Water Resources Mgmt Plan Update\WorkFiles\Report\December 15 2011 FINAL DRAFT\Edina_SWMP_FINAL_v1.docx
Project Name/Location Description Proposed Improvement Priority
1
Southeast Minnehaha Creek
Complete stormwater analysis to determine potential
flooding impacts of Minnehaha Creek overtopping just north
of West 58th Street.
Flooding problem Complete stormwater analysis to determine potential flooding
impacts of Minnehaha Creek overtopping just north of West 58th
Street. E-15
Subwatershed LP_15 (6213 Ewing Ave) Flooding problem Upgrade to larger pipes. C-26
Subwatershed LP_24 (5837, 5833, 5829, & 5825 South
Chowen Ave) Flooding problem Installation of a catchbasin in backyard depression area. C-27
Subwatershed LP_27 (Chowen Ave & West 60th St) Flooding problem Perform detailed survey/verification of storm sewer to verify
pipe sizes, inverts, and low point of entry. E-4
Subwatershed MHS_4 (3600 West Fuller St) Flooding problem Installation of a catchbasin in backyard depression and storm
sewer along Beard Ave. C-19
Subwatersheds MHS_24, MHS_66 (5609, 5605 Dalrymple
Rd & 5610, 5612 St. Andrews Ave) Flooding problem Construct surface overflow swale (1) or upgrade to larger pipes
(2). C-29
Subwatershed MHS_79 (5605, 5609, 5613, 5617, 5621,
5625, & 5629 Beard Ave) Flooding problem Upgrade to larger pipes. Install catchbasin in alley. C-20
Subwatershed MHS_89 (5840 & 5836 Ashcroft Ave) Flooding problem Work with homeowners to evaluate installation of catch basin
from backyard depression. C-28
Subwatershed ML_7 (5213 & 5217 Richwood Ave) Flooding problem Perform detailed field survey of wetland storage. Further
analysis required. E-5
Subwatershed ML_12 (5701 Dale Avenue) Flooding problem Upgrade to larger pipes. C-30
Northwest Minnehaha Creek
Interlachen Landlocked Area Flooding problem
Construct/raise embankment between landlocked wetland and
Meadowbrook Golf Course. Develop management plan for
pumped outlet.
C-46
1 C indicates a construction project, E indicates that an engineering study is required