october 2, 2013 full packet issuu

Our Mission is to protect, manage and improve the water resources of Capitol Region Watershed District

Regular Meeting of the Capitol Region Watershed District (CRWD) Board Of Managers, for Wednesday,

October 2, 2013 6:00 p.m. at the office of the CRWD, 1410 Energy Park Drive, Suite 4, St. Paul, Minnesota.

REGULAR MEETING AGENDA

I. Call to Order of Regular Meeting (President Joe Collins)

A) Attendance

B) Oath of Office, Managers Texer and Reider

C) Review, Amendments and Approval of the Agenda

II. Public Comment For Items not on the Agenda (Please observe a limit of three minutes per person.)

III. Permit Applications and Program Updates (Permit Process: 1) Staff Review/Recommendation, 2) Applicant Response, 3) Public Comment, and 4)

Board Discussion and Action.)

A) Permit # 13-024 Met Council Sanitary Sewer Realignment Project (Kelley) B) Permit # 13-025 Vandalia Redevelopment (Kelley) C) Permit # 13-026 Associated Bank (Kelley) D) Permit # 13-027 Vintage on Selby (Kelley) E) Permit Program/Rules Update (Kelley)

IV. Special Reports A) Strategic Stormwater Solutions for Transit Oriented Development, Wes Saunders Pearce, City of St. Paul and Joni Giese, SRF Consulting Group, Inc.

V. Action Items A) AR: Approve Minutes of the September 18, 2013 Regular Meeting (Sylvander) B) AR: Authorize 2014 Special Grant Agreements (Zwonitzer) C) AR: Approve Curtiss Pond Improvement Project Feasibility Study (Fossum) D) AR: Authorize FY 2014 Clean Water Fund Grant Application (Zwonitzer)

VI. Unfinished Business A. FI: Villa Park Wetland Restoration Project Update (Fossum) B. FI: Trout Brook Nature Sanctuary Update (Fossum) C. FI: Lake McCarrons Update (Doneux) D. FI: CAC Update (Doneux)

VII. General Information

A) Administrators Report

VIII. Next Meeting

A) Wednesday, October 16, 2013 Meeting Agenda Review

IX. Adjournment W:\04 Board of Managers\Agendas\2013\October 2, 2013 Agenda Regular Mtg.docx

Materials Enclosed

Capitol Region Watershed District Permit Application 13-024 Met Council Sanitary Realignment

Permit Report 13-024 October 2, 2013 Board Meeting

Aerial Photo

Applicant: Jeny Shah Consultant: Eric Leagjeld MCES CNA Consulting Engineers, Inc. 3565 Kennebec Dr 2800 University Ave SE, Suite 102 Eagan, MN 55122 Minneapolis, MN 55414 Description: Abandon existing sanitary in Trout Brook underneath 35E and realign north of Maryland Avenue Stormwater Management: None, MS4 connection and erosion control only District Rule: E, F, and G Disturbed Area: Unkown Impervious Area: None Recommendation: Table with 6 Conditions

Permit Location

LOrient

Maryland Avenue

1. Determine and clarify on the plans if the annular space around the 24-inch sewer pipe is empty. If so, provide fill for the entire annular space.

2. Provide notes or details to address the following: a. Work must be performed to ensure the structural integrity of the TBI is not compromised. b. Work must be performed to ensure the annular space is cleaned and flushed prior to filling, and completely filled with CLSM to

prevent air pockets. 3. Identify and delineate wetland areas on plans and document extent of impacts. Obtain Wetland Conservation Act permits if neces-

sary. 4. Floating silt curtain is shown to be installed perpendicular to flow in the open channel. Provide alternative BMP to ensure minimi-

zation of sediment transport off of the project. 5. Document total project land disturbance and provide NPDES permit if required. 6. Provide plans signed by a professional engineer per the Minnesota Board of AELSLAGID.

W:\07 Programs\Permitting\2013\13-024 Met Council Sanitary 35E Crossing\13-024 Permit_Review.doc Page 1 of 3

Capitol Region Watershed District Permit Report

CRWD Permit #: 13-024 Review date: September 20, 2013 Project Name: Metropolitan Council Sanitary Realigment Applicant: Jeny Shah, MCES 3565 Kennebec Drive Eagan, MN 55122 Purpose: Remove sanitary sewer from Trout Brook East Branch and

reconstruct north of existing alignment Location: North of Maryland Avenue under I-35E Applicable Rules: E, F, and G Recommendation: Table with 6 Conditions EXHIBITS:

1. 100% Review Plan set by CNA, 20 sheets dated 8/20/13, recd 9/6/13 HISTORY & CONSIDERATIONS: None. RULE E: WETLAND MANAGEMENT Standard

Wetlands shall not be drained, filled (wholly or in part), excavated, or have sustaining hydrology impacted such that there will be a decrease in the inherent (existing) functions and values of the wetland.

A minimum buffer of 25 feet of permanent nonimpacted vegetative ground cover abutting and surrounding a wetland is required.

Findings 1. There may be wetlands located on the property. 2. It is unknown if permanent wetland impacts will result as part of the project.

RULE F: EROSION AND SEDIMENT CONTROL


Standards A plan shall demonstrate that appropriate erosion and sediment control

measures protect downstream water bodies from the effects of a land-disturbing activity.

Erosion Control Plans must adhere to the MPCA Protecting Water Quality in Urban Areas Manual.

Findings 1. Erosion and sediment control measures are not consistent with best

management practices, as demonstrated in the MPCA manual Protecting Water Quality in Urban Areas.

2. Adjacent properties are protected from sediment transport/deposition. 3. Wetlands, waterbodies and water conveyance systems are not protected from

erosion/sediment transport/deposition. 4. Total land disturbance is unknown; an NPDES permit may be required.

RULE G: ILLICIT DISCHARGE AND CONNECTION

Standard Stormwater management and utility plans shall indicate all existing and

proposed connections from developed and undeveloped lands for all water that drains to the District MS4.

Findings

1. Approximately 760 feet of 24-inch sanitary sewer pipe-in-pipe section will be abandoned and filled with controlled low-strength material (CLSM). The existing TBI includes a 7-ft 6-in. (90-inch) diameter RCP between Sta. 1+65 and 5+90, and a 7-ft (84-inch) diameter RCP between Sta.5+90 and 9+25.

2. Although the September 2007 TBI assessment (TKDA/CNA) identified this section of the East Extension to be in Good Condition. Some spalling was noted along the external side of the pipe-in-pipe section during recent projects.

3. Review of the XP-SWMM model does not identify areas of flooding concern upstream of the project.

4. Details 3 and 6 on Sheet D3 of the submitted preliminary plans suggest that the annular space around the 24-inch sewer pipe may not be filled. It is CRWDs understanding that when this pipe was constructed inside the TBI that the annular space was filled with concrete or grout. If the annular space around the 24-inch sewer pipe is empty, then the entire annular space should be filled as well.

RECOMMENDATION: Table with 6 Conditions Conditions:

1. Determine and clarify on the plans if the annular space around the 24-inch sewer pipe is empty. If so, provide fill for the entire annular space.

2. Provide notes or details to address the following: a. Work must be performed to ensure the structural integrity of the TBI is not

compromised.


b. Work must be performed to ensure the annular space is cleaned and flushed prior to filling, and completely filled with CLSM to prevent air pockets.

3. Identify and delineate wetland areas on plans and document extent of impacts. Obtain Wetland Conservation Act permits if necessary.

4. Floating silt curtain is shown to be installed perpendicular to flow in the open channel. Provide alternative BMP to ensure minimization of sediment transport off of the project.

5. Document total project land disturbance and provide NPDES permit if required. 6. Provide plans signed by a professional engineer per the Minnesota Board of

AELSLAGID.

.

Capitol Region Watershed District Permit Application 13-025 Vandalia Redevelopment


Aerial Photo

Applicant: Melissa Gorman Consultant: Matt Pavek First & First Civil Site Group, Inc.. 105 North First Street 4931 W. 35th Street, Suite 200 Minneapolis, MN 55401 St. Louis Park, MN 55416 Description: Redevelopment of existing warehouse and light industrial property Stormwater Management: Underground infiltration system District Rule: C, D, and F Disturbed Area: 0.98 Acres Impervious Area: 1.63 Acres (future phases) PERMIT RECOMMENDATION: Approve with 8 Conditions

Permit Location

Vand

alia

Wabash

1. Receipt of $8,150 surety and recorded maintenance agreement. 2. Provide updated land disturbance area due to utilities and provide a copy of the NPDES permit if required. 3. Extend erosion control and project limits to include the proposed sanitary sewer and water main located outside the de-

lineated disturbed area and erosion control. 4. Provide a detail for the underground system. 5. Provide a detail for the underground system outlet structure. 6. Specify in plan set or detail that rock placed around underground system shall be washed, angular stone and exclude

limestone and crushed concrete. 7. Demonstrate how runoff from the roof area is directed into the underground system. A portion of the roof is delineated

to contribute runoff to the proposed underground system, but it is not clear how runoff is directed to the system. 8. Provide a map showing the 1.63 acres anticipated for ultimate development. VOLUME BANK RECOMMENDATION: Approve deposit of 8,179 cubic feet of volume reduction bank credits to First and First for use on future phases of develop-ment.

W:\07 Programs\Permitting\2013\13-025 Vandalia Redevelopment\13-025 PermitReport1a.doc Page 1 of 4


CRWD Permit #: 13-025 Review date: September 23, 2013 Project Name: Vandalia Redevelopment and Volume Bank Request Applicant: Ms. Melissa Gorman First & First 105 N 1st Street Minneapolis, MN 55401 Purpose: A partial redevelopment of a site including upgraded buildings,

parking facilities, entrances and landscape features. Location: 550 North Vandalia St., St Paul, MN Applicable Rules: C, D, and F PERMIT RECOMMENDATION: Approve with 8 Conditions VOLUME BANK RECOMMENDATION Approve deposit of 8,179 cubic feet of volume reduction bank credits to First and First for use on future phases of development. EXHIBITS:

1. Stormwater Management Report, by Civil Site Group, dated 9/11/13, recd. 9/11/13.

2. Construction Plans (Sheets C-0 C-4, C-4A, C-6, L-1, L-2), by Civil Site Group, dated 9/11/13, recd. 9/11/13.

HISTORY & CONSIDERATIONS: The first phase of the development disturbs less than one acre (0.98 acres), so a CRWD permit is not required. However, the applicant anticipates that ultimate development will disturb approximately 1.63 acres. The purpose of this application is to deposit volume reduction credits in an account to be used for future development on the site. RULE C: STORMWATER MANAGEMENT


Standards Proposed discharge rates for the 2-, 10-, and 100-year events shall not exceed

existing rates. Developments and redevelopments must reduce runoff volumes in the amount

equivalent to an inch of runoff from the impervious areas of the site. Stormwater must be pretreated before discharging to infiltration areas to

maintain the long-term viability of the infiltration area. Developments and redevelopments must incorporate effective non-point

source pollution reduction BMPs to achieve 90% total suspended solid removal.

Findings 1. A hydrograph method based on sound hydrologic theory is used to analyze

runoff for the design or analysis of flows and water levels. 2. Runoff rates for the proposed activity do not exceed existing runoff rates for

the 2-, 10-, and 100-year critical storm events. Stormwater leaving the project area is discharged into a well-defined receiving channel or pipe and routed to a public drainage system.

3. Stormwater runoff volume retention is not required at this time because the disturbed area is less than 1.0 acre.

a. Ultimate development will result in 62,145 sf of impervious surface. b. Volume retention required for ultimate development: Volume Retention Required (cu. ft.) Volume Retention Provided (cu. ft.)

5,179 cf BMP Volume Below Underground 12,937 cf

c. Infiltration volume and facility size has been calculated using the

appropriate hydrological soil group classification and design infiltration rate.

d. The infiltration area is capable of infiltrating the required volume (5,179 cf) within 48 hours. However, the full storage volume (12,937 cf) takes approximately 68 hours to infiltrate. The volume that takes longer than 48 hours to infiltrate is not eligible for deposit into the volume retention bank (between 896.5 and 894.7; 4,758 cf).

e. Banking of excess volume retention of 8,179 cubic feet is proposed. When ultimate development occurs, a balance of approximately 3,000 cubic feet would remain in the applicants volume retention bank.

f. Stormwater runoff is pretreated to remove solids before discharging to infiltration areas.

4. Alternative compliance sequencing has not been requested. 5. Best management practices achieve 90% total suspended solids removal from

the runoff generated on an annual basis. 6. A recordable executed maintenance agreement has not been submitted.

RULE D: FLOOD CONTROL


Standards Compensatory storage shall be provided for fill placed within the 100-year

floodplain. All habitable buildings, roads, and parking structures on or adjacent to a

project site shall comply with District freeboard requirements. Findings 1. There is no floodplain on the property according to FEMA. 2. All habitable buildings, roads, and parking structures on or adjacent to the

project site comply with CRWD freeboard requirements. RULE E: WETLAND MANAGEMENT Standard



Findings 1. There are no known wetlands located on the property.





Findings 1. Erosion and sediment control measures are consistent with best management

practices, as demonstrated in the MPCA manual Protecting Water Quality in Urban Areas.

2. Adjacent properties are protected from sediment transport/deposition. 3. Wetlands, waterbodies and water conveyance systems are protected from

erosion/sediment transport/deposition. 4. Project site may be greater than 1 acre; an NPDES permit is required.





Findings 1. New direct connections or replacement of existing connections are not

proposed. 2. Prohibited discharges are not proposed.

PERMIT RECOMMENDATION: Approve with 8 Conditions Conditions:

1. Receipt of $8,150 surety and recorded maintenance agreement. 2. Provide updated land disturbance area due to utilities and provide a copy of the

NPDES permit if required. 3. Extend erosion control and project limits to include the proposed sanitary sewer

and water main located outside the delineated disturbed area and erosion control. 4. Provide a detail for the underground system. 5. Provide a detail for the underground system outlet structure. 6. Specify in plan set or detail that rock placed around underground system shall be

washed, angular stone and exclude limestone and crushed concrete. 7. Demonstrate how runoff from the roof area is directed into the underground

system. A portion of the roof is delineated to contribute runoff to the proposed underground system, but it is not clear how runoff is directed to the system.

8. Provide a map showing the 1.63 acres anticipated for ultimate development. VOLUME BANK RECOMMENDATION Approve creation and deposit of 8,179 cubic feet of volume reduction bank credits to First and First for use on future phases of development.

GRADING, DRAINAGE& EROSION CONTROL

PLAN

C-3

VANDALIA

550 NORTH VANDALIA STST. PAUL, MN 55114

-

RLB

PJS

Signature :

Name :

Registration :

Print History Date

Project

Checked

Drawn

Project Contact :

Phone Number :

4931 West 35th StreetSuite 200

St. Louis Park, Minnesota55416

T...952.541.9969

www.wcla.com

952.250.2003 / 763.213.3944

CivilSiteGroup.com

CITY SITE PLAN SUBMITTAL 7/2/13

ISSUED WITH CITY REVISIONS

ISSUED FOR BID

7/29/13

8/2/13

FINAL BID 8/5/13

OWNER CHECK SET 8/30/13

WATERSHED SUBMITTAL 9/11/13

MATTHEW R. PAVEK

44263

MATTHEW R. PAVEK

763-213-3944

I hereby certify that this plan, specification, or reportwas prepared by me or under my direct supervision and that I am a duly Licensed Professional Engineer

under the laws of the State of Minnesota.

Capitol Region Watershed District Permit Application 13-026 Associated Bank


Aerial Photo

Applicant: Doug Harber Consultant: David Ahrens Associated Bank Stantec 2655 Campus Drive 2335 Highway 36 West Plymouth MN 55441 St. Paul, MN 55113 Description: Demolition and construction of a new bank at the corner of Snelling and Dayton Stormwater Management: Underground infiltration/filtration system District Rule: C, D, and F Disturbed Area: 1.5 Acres Impervious Area: 1.03 Acres PERMIT RECOMMENDATION: Table with 10 Conditions

Permit Location

Dayton

Marshall

1. Receipt of $5,150 surety and recorded maintenance agreement. 2. Provide a copy of the NPDES permit. 3. Provide plans signed by a professional engineer per the Minnesota Board of AELSLAGID. 4. Revise the proposed HydroCAD model to include runoff draining to the northwest through the new swale. Under exist-

ing conditions, this area drains to the south through storm sewer. Demonstrate that the new drainage route does not neg-atively impact downstream properties.

5. Specify within the plan set or include a detail to show the number and volume of underground chambers. Confirm these values correspond with HydroCAD Model.

6. Provide documentation that the parking lot removal and grading of swale on Soo Line ROW is acceptable to the property owners. Document who owns the property.

7. Demonstrate how the Associated Bank building runoff is directed to underground system. 8. Revise plans or HydroCAD to correspond; the underground system outlet invert elevation is 925.56 on the plans and

924.80 in HydroCAD. The outlet pipe length is 60 feet on the plans and 70 feet in HydroCAD. 9. Increase the elevation of the 6-inch outlet pipe to provide at least 4,361 cf of storage between the outlet invert elevation

and the top of the sand. Ensure that the 4,361 cf will drawdown within 48 hours. 10.Remove the geotextile fabric between the sand and storage rock.

W:\07 Programs\Permitting\2013\13-026 Associated Bank\13-026 PermitReport1a.doc Page 1 of 4


CRWD Permit #: 13-026 Review date: September 23, 2013 Project Name: Associated Bank Applicant: Mr. Doug Harber Associated Bank 2655 Campus Drive Plymouth, MN 55441 Purpose: Construction of new building and parking lot with an underground

storage and filtration system. Location: Northeast Corner of the intersection of Snelling Avenue North and

West Dayton Avenue. Applicable Rules: C, D, and F Recommendation: Table with 10 conditions EXHIBITS:

1. CRWD Volume Control Worksheet, recd. 9/11/13. 2. Memo to CRWD, by Stantec, dated 9/11/13, recd. 9/11/13. 3. Geotechnical Evaluation Report, by Braun Intertec Corporation, dated 9/6/13,

recd. 9/11/13. 4. HydroCAD results, by Stantec, dated 9/11/13, recd. 9/11/13. 5. Construction plans (G1-01, C0-01, C0.02, C1.01, C2-01, C2-02, C2-03, C3-01,

C4-01, C5-01, C8.01, C8.02, L1.01), by Stantec, dated 8/27/13, recd. 9/11/13. HISTORY & CONSIDERATIONS: Permit application 13-027 includes redevelopment surrounding the 13-026 project site. RULE C: STORMWATER MANAGEMENT


existing rates. Developments and redevelopments must reduce runoff volumes in the amount

equivalent to an inch of runoff from the impervious areas of the site.


Stormwater must be pretreated before discharging to infiltration areas to maintain the long-term viability of the infiltration area.

Developments and redevelopments must incorporate effective non-point source pollution reduction BMPs to achieve 90% total suspended solid removal.



the 2-, 10-, and 100-year critical storm events. Stormwater leaving the project area is not discharged into a well-defined receiving channel or pipe and routed to a public drainage system.

3. Stormwater runoff volume retention is not achieved onsite in the amount equivalent to the runoff generated from one inch of rainfall over the impervious surfaces of the development.

a. The amount of proposed impervious onsite is 44,724 square feet. b. Volume retention: Volume Retention Required (cu. ft.) Volume Retention Provided (cu. ft.)

3,354 None, filtration is proposed.

c. Filtration is proposed due to poor soils on-site: Volume Retention Required (cu. ft.) Volume Retention Provided (cu. ft.)

4,361 None, outlet is located at bottom of filtration volume. Void space within the sand filter is not eligible for volume retention credit.

d. Banking of excess volume retention is not proposed. e. It is not known if the filtration volume and size has been calculated

using the appropriate hydrological soil group classification and design filtration rate.

f. It is not known if the filtration area is capable of infiltrating the required volume within 48 hours.

g. Stormwater runoff is pretreated to remove solids before discharging to infiltration areas.

4. Alternative compliance sequencing has not been requested. 5. If the CRWD volume retention standard is met, the project will achieve 90%

total suspended solids removal from the runoff generated on an annual basis. 6. A recordable executed maintenance agreement has not been submitted.



floodplain.


All habitable buildings, roads, and parking structures on or adjacent to a project site shall comply with District freeboard requirements.

Findings 1. There is no floodplain on the property according to FEMA. 2. All habitable buildings, roads, and parking structures on or adjacent to the












erosion/sediment transport/deposition. 4. Project site is greater than 1 acre; an NPDES permit is required.








1. Receipt of $5,150 surety and recorded maintenance agreement. 2. Provide a copy of the NPDES permit. 3. Provide plans signed by a professional engineer per the Minnesota Board of

AELSLAGID. 4. Revise the proposed HydroCAD model to include runoff draining to the

northwest through the new swale. Under existing conditions, this area drains to the south through storm sewer. Demonstrate that the new drainage route does not negatively impact downstream properties.

5. Specify within the plan set or include a detail to show the number and volume of underground chambers. Confirm these values correspond with HydroCAD Model.

6. Provide documentation that the parking lot removal and grading of swale on Soo Line ROW is acceptable to the property owners. Document who owns the property.

7. Demonstrate how the Associated Bank building runoff is directed to underground system.

8. Revise plans or HydroCAD to correspond; the underground system outlet invert elevation is 925.56 on the plans and 924.80 in HydroCAD. The outlet pipe length is 60 feet on the plans and 70 feet in HydroCAD.

9. Increase the elevation of the 6-inch outlet pipe to provide at least 4,361 cf of storage between the outlet invert elevation and the top of the sand. Ensure that the 4,361 cf will drawdown within 48 hours.

10. Remove the geotextile fabric between the sand and storage rock.

>>>> >>>>

>> >> >>

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ASSOCIATED BANKBUILDING

FFE=100'-0"=931.30

CB 1R=931.70I=928.70

CBMH 2R=930.95I=927.95 (12")I=927.70 (15")

42 LF - 12" STRM @ 1.8%

MH 6R=931.14I=926.12

SUMP=923.12

50 LF - 15" STRM @ 3.3%

CBMH 4R=929.85I=926.85

MH 3R=930.60I=926.30

55 LF - 12" STRM @ 1.0%

52' X 109' UNDERGROUNDSTORM WATER CHAMBERS.

17 LF - 15" STRM@ 1.1%

MH 6CONSTRUCT STORMMANHOLE OVER EX. 18" RCP.R=930.95I=924.96 (6")I=923.25 (4" DT)I=923.01 (EX. 18")

SITE PROPERTY LINE

60 LF - 6" STRM @ 1.0%

6 LF - 15" STRM @ 1.0%

CB 5R=930.63I=927.13

58 LF - 12" STRM@ 0.5%

6" DRAINTILE - REFER TO B/C8.02

100 LF - 6" DRAINTILE

6" STRM OUTLET@ 925.56

60 LF - 4" DRAINTILE @ 0.5%

DO NOT INSTALL CHAMBERSUNDER LANDSCAPING.

20 400

Horizontal Scale In Feet

Capitol Region Watershed District Permit Application 13-027 Vintage on Selby


Aerial Photo

Applicant: Tony Barranco Consultant: Dan Elenbaas Ryan Companies, Inc. Ryan A+E 50 South Tenth Street Suite 300 50 South Tenth Street Suite 300 Minneapolis, MN 55403 Minneapolis, MN 55403 Description: Demolition of existing Associated Bank and construction of a new mixed use development at Snelling and Selby Stormwater Management: Rooftop filtration, underground infiltration, surface infiltration basin, and tree trenches District Rule: C, D, and F Disturbed Area: 3.7 Acres Impervious Area: 3.06 Acres PERMIT RECOMMENDATION: Table with 12 Conditions

Permit Location

Snel

ling

Aven

ue

Selby

1. Receipt of $15,300 surety and recorded maintenance agreement. 2. Provide a copy of the NPDES permit. 3. Provide plans signed by a professional engineer per the Minnesota Board of AELSLAGID. 4. Provide a re-vegetation or landscape plan for area not being developed in the northwest corner. 5. Provide a pretreatment system and details for how water enters the raingarden. 6. Provide elevations for contours on Sheet C501 7. Separate the two underground systems in the Hydraflow Model. They appear to be hydraulically separated rather than

operating as one system. 8. Specify Stormtech crown and invert elevations and rock elevations in the plan set. 9. Clarify the outlet pipe size from the Stormtech system. The narrative states a 4-inch outlet pipe, but sheet C502 indicates

a 12 inch pipe. 10.Provide soil borings for the south portion of the site. If Type B or C soils, assume that infiltration is feasible and design

the required volume retention to infiltrate within 48 hours. 11.Specify the location of the proposed tree trenches in the plan set. Include a cross-section and/or longitudinal detail. The

narrative indicates tree trenches for stormwater management are proposed, but these are not identified on the plan set. 12.Include a detail in the plan set to substantiate volume retention claimed for the roof filters..

W:\07 Programs\Permitting\2013\13-027 Vintage On Selby\13-027 PermitReport1a.doc Page 1 of 4


CRWD Permit #: 13-027 Review date: September 23, 2013 Project Name: Vintage on Selby Applicant: Mr. Tony Barranco Ryan Companies, Inc. 50 S 10th Street, Suite 300 Minneapolis, MN 55403 Purpose: Redevelopment into apartment building, underground parking, and

stormwater management systems. Location: East side of the intersection of Snelling Avenue North and West

Dayton Avenue Applicable Rules: C, D, and F Recommendation: Table with 12 Conditions EXHIBITS:

1. Stormwater Design Summary, by Ryan Companies, dated 9/11/13, recd. 9/11/13. 2. Schematic Design Plans (sheets C001, C101, C201, C202, C301, C302, C401,

C402, C501, C502, C601, C701, Fig A, Fig B, L101, L102, L103, L104), by Ryan Companies, dated 9/11/13, recd. 9/11/13.

3. Hydraflow results, by Ryan Companies, dated 9/11/13, recd. 9/11/13. 4. Geotechnical Evaluation Report, by Braun Intertec Corporation, dated 9/6/13,

recd. 9/11/13. 5. CRWD Volume Control Worksheet, recd. 9/11/13.

HISTORY & CONSIDERATIONS: Permit application 13-026 includes redevelopment within the 13-027 project site. RULE C: STORMWATER MANAGEMENT


existing rates.


Developments and redevelopments must reduce runoff volumes in the amount equivalent to an inch of runoff from the impervious areas of the site.

Stormwater must be pretreated before discharging to infiltration areas to maintain the long-term viability of the infiltration area.

Developments and redevelopments must incorporate effective non-point source pollution reduction BMPs to achieve 90% total suspended solid removal.



the 2-, 10-, and 100-year critical storm events. Stormwater leaving the project area is discharged into a well-defined receiving channel or pipe and routed to a public drainage system.

3. Stormwater runoff volume retention is not achieved onsite in the amount equivalent to the runoff generated from one inch of rainfall over the impervious surfaces of the development.

a. The amount of proposed impervious onsite is 133,450 square feet. b. Volume retention: Volume Retention Required (cu. ft.) Volume Retention Provided (cu. ft.)

10,009 None, filtration is proposed. However, infiltration may be necessary upon review of soil boring results.

c. Filtration is proposed due to poor soils: Volume Retention Required (cu. ft.) Volume Retention Provided (cu. ft.)

13,011 To be determined after review of soil borings.

d. Banking of excess volume retention is not proposed. e. Soil boring results were only provided for the portion of the site north

of Dayton Street. f. If infiltration is not feasible south of Dayton Street, a filtration layer

must be included in the design of the underground system. g. Stormwater runoff is not pretreated to remove solids before

discharging to infiltration areas. 4. Alternative compliance sequencing has not been requested. 5. If the CRWD volume retention standard is met, the project will achieve 90%

total suspended solids removal from the runoff generated on an annual basis. 6. A recordable executed maintenance agreement has not been submitted.




floodplain. All habitable buildings, roads, and parking structures on or adjacent to a

project site shall comply with District freeboard requirements. Findings 1. There is no floodplain on the property according to FEMA. 2. All habitable buildings, roads, and parking structures on or adjacent to the












erosion/sediment transport/deposition. 4. Project site is greater than 1 acre; an NPDES permit is required.








1. Receipt of $15,300 surety and recorded maintenance agreement. 2. Provide a copy of the NPDES permit. 3. Provide plans signed by a professional engineer per the Minnesota Board of

AELSLAGID. 4. Provide a re-vegetation or landscape plan for area not being developed in the

northwest corner. 5. Provide a pretreatment system and details for how water enters the raingarden. 6. Provide elevations for contours on Sheet C501 7. Separate the two underground systems in the Hydraflow Model. They appear to

be hydraulically separated rather than operating as one system. 8. Specify Stormtech crown and invert elevations and rock elevations in the plan set. 9. Clarify the outlet pipe size from the Stormtech system. The narrative states a 4-

inch outlet pipe, but sheet C502 indicates a 12 inch pipe. 10. Provide soil borings for the south portion of the site. If Type B or C soils, assume

that infiltration is feasible and design the required volume retention to infiltrate within 48 hours.

11. Specify the location of the proposed tree trenches in the plan set. Include a cross-section and/or longitudinal detail. The narrative indicates tree trenches for stormwater management are proposed, but these are not identified on the plan set.

12. Include a detail in the plan set to substantiate volume retention claimed for the roof filters.

Our Mission is to protect, manage and improve the water resources of Capitol Region Watershed District.

DATE: September 26, 2013

TO: CRWD Board of Managers

FROM: Mark Doneux, Administrator

RE: Strategic Stormwater Solutions for Transit Oriented Development

Background

At the July 18, 2012 Board meeting, Wes Saunders-Pearce, the City of Saint Paul Water Resource

Coordinator, gave a presentation about the Citys Strategic Stormwater Solutions for Transit Oriented Design (Formerly called Central Corridor Stormwater and Green Infrastructure Planning Project). The

purpose of the project is to create a framework for the development of shared, stacked-function green

infrastructure for stormwater management as transit-oriented redevelopment occurs in the Central

Corridor. Started in 2012, the project is now in complete and a draft final report is ready for review and

comment.

Issues

Excerpt from the Executive Summary of the report: The Strategic Stormwater Solutions for Transit-Oriented Development project investigated whether stormwater management along the Central

Corridor could more robustly achieve the communitys redevelopment vision for the corridor. When redevelopment occurs in established urban communities, stormwater management facilities are

competing with other site features for limited and valuable space, resulting in stormwater facilities

being relegated underground a vast majority of the time. Since 2011, 92 percent of Saint Paul

redevelopment sites along the Green Line requiring stormwater management placed stormwater below

ground for the purpose of slowly releasing the water into the Citys storm sewer system. When this happens, an opportunity to use stormwater to create a green, sustainable and vibrant community is lost.

The study provides a stormwater management framework for the implementation of shared, stacked-

function green infrastructure (SSGI) a system in which stormwater runoff generated from multiple parcels is jointly treated in shared green infrastructure. Communities both locally and nationally are

incorporating green infrastructure into their stormwater management toolbox.

Enclosed is the final draft of the report. Wes Saunders-Pearce from the City of St. Paul and Joni Giese

from the SRF Consulting Group, Inc. will present the findings of this study. Staff will seek approval of

comments on this report from the Board at the October 16th

meeting.

Requested Action

For informational purposes and soliciting feedback from CRWDs Board of Managers.

enc: Final Draft Strategic Stormwater Solutions for Transit Oriented Development

W:\06 Projects\CCLRT\Saint Paul Central Corridor SSGI\Board Memo - SSS for TOD 9-26-13.docx

October 2, 2013 Board Meeting

IV. Special Reports

A) Strategic Stormwater Solutions for Transit

Oriented Development

(Doneux)

Draft final report Saint paul, Mn SepteMber 10, 2013

Strategic Stormwater Solutionsfor transit-oriented Development

E N G I N E E R SP L A N N E R SD E S I G N E R S

Consulting Group, Inc.

Strategic StorMwater SolutionS for Transit-Oriented Development final report

Strategic Stormwater SolutionsDraft final reportfor transit-oriented Development

clientWes Saunders-Pearce, City of Saint Paul

consultant teamSRF Consulting Group, Inc.

Wenck Associates, Inc.

Craig David

Kennedy & Graven

Low Impact Development Center

Stakeholder advisory committee participantsAnne Hunt, City of Saint Paul Mayors Office

Anne Weber, City of Saint Paul Public Works - Sewer Utility

Bruce Elder, City of Saint Paul Public Works - Sewer Utility

Ellen Stewart, City of Saint Paul Parks - Design

Josh Williams, City of Saint Paul PED - Planning

Anton Jerve, City of Saint Paul PED - Planning

Donna Drummond, City of Saint Paul PED - Planning

Tom Beach, City of Saint Paul DSI - Zoning

Wes Saunders-Pearce, City of Saint Paul DSI - Zoning

Haila Maze, City of Minneapolis CPED

Lois Eberhart, City of Minneapolis Public Works

Cathy Abene, University of Minnesota

Anna Eleria, Capitol Region Watershed District

Lorrie Stromme, Mississippi Watershed Management Organization

Dan Kalmon, Mississippi Watershed Management Organization

Tim Griffin, Saint Paul Riverfront Corporation

Josh Kinney, Saint Paul Riverfront Corporation

Christine Baeumler, Public Art Saint Paul

additional participantsJenna Fletcher, Trust for Public LandNora Riemenschneider, Metropolitan CouncilKallen Hayes, Metropolitan CouncilDon Stein, City of Saint Paul Public Works- Right-of-Way

Mark Doneux, Capitol Region Watershed DistrictShanai Matteson, Works ProgressKelly Moriarity, City of Minneapolis Public WorksDoug Snyder, Mississippi Watershed Management Organization

The work that provided the basis for this publication was supported by funding under an award with the U.S. Department of Housing and Urban Development. The substance and findings of the work are dedicated to the public. The author and publisher are solely responsible for the accuracy of the statements and interpretations contained in this publication. Such interpretations do not necessarily reflect the views of the Government.

table of contents

executive Summary

1. introductionProject Focus

Partners,Funding and Timeline

Corridor Redevelopment Goals

Saint Paul

Minneapolis

Stormwater Management Along the Corridor

2. project approachSet the foundation

Shared, Stacked-Function Green Infrastructure (SSGI) Definition

Potential SSGI Implementation Barriers

Right-of-Way Considerations

Developers Focus Group

Governmental Authority Relating to Stormwater Infrastructure

Existing Stormwater Rules and Regulations

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explore opportunities

Key National Studies

Review of National and Local Precedents

Public Art Integration

evaluate and Select options

Potential Redevelopment Sites Identification

Potential SSGI Approaches

Application of SSGI at Different Development Scales

work through the Details

Boeser Site

Curfew Commons Park Site

3. SSgi implementationDraft Policy Resolution

Perform Pilot Studies

Revise Regulatory Framework

Institutionalize SSGI into Agency Processes

Implementation Tools

SSGI Assessment Tool

Public Art Implementation

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list of figuresExisting Stormwater Approach on LRT Green Line in Saint Paul

Figure 1.1 Corridor Map

Figure 1.2 Existing Stormwater Approach on LRT Green Line in Saint Paul

Figure 1.3 SSGI relation to benefits

Figure 1.4 Corridor Planning Efforts

Figure 1.5 Excerpt from Rooting Out Pollution Poster

Figure 2.1 Definition of SSGI

Figure 2.2 Governmental Authority

Figure 2.3 Potential Redevelopment Sites Minneapolis

Figure 2.4 Potential Redevelopment Sites Saint Paul (West Segment)

Figure 2.5 Potential Redevelopment Sites Saint Paul (East Segment)

Figure 2.6

Figure 2.7 Bus Barn Street R/W Concept

Figure 2.8 Brownstone New Private Open Space Concept

Figure 2.7 Context Map

Figure 2.8 Boeser Site Concept Drainage Area

Figure 2.9 Representative Public Art Concepts

Figure 2.10 Boeser Concept Plan

Figure 2.11 Boeser Concept: Illustrative Section Perspective

Figure 2.12 Conceptual Drainage Area

Figure 2.13 Representative Public Art Concepts

Figure 2.14 Curfew Commons Concept: Illustrative Plan

Figure 2.15 Curfew Commons Concept : Illustrative Section

Figure 2.16 Curfew Commons Concept : Section Detail

Figure 3.1 SSGI Assessment Tool Template

Figure 4.1 Possible SSGI Implementation Approaches

Strategic Stormwater SolutionS for Transit-Oriented Development Final report

list of figures

4. findings & conclusionflexibility Supports Vision

Define a process

Development Scale is important

potential for financial balance

be opportunistic

appendicesA. White Paper: Governmental Authority Relating to Stormwater Infrastructure

B. Technical Memorandum: Existing Stormwater Rules and Regulations

D. Technical Memorandum: Technical Analysis and Evaluation

E. Technical Memorandum: Prior-University Redevelopment (Green Alley)

C. White Paper: Fluxion ~ gARTens

F. Technical Memorandum: Advance Design

G. White Paper: Policy Investigation

H. White Paper: FLUXION~gARTens Implementation

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project focus SSgi implementation findings & conclusionsexecutive Summary

Strategic Stormwater Solutionsfor transit-oriented Development

Currently under construction, Metro Transits Light Rail Transit Green Line (also known as the Central Corridor) will run 11 miles from Target Field in downtown Minneapolis, Minnesota, passing through the University of Minnesota Twin Cities campus to Union Depot in downtown St. Paul, Minnesota, beginning in 2014. This new LRT line is expected to spur desired redevelopment along the corridor. The redeveloped corridor is envisioned with new parks and open spaces and incorporating transit-oriented development and sustainable design principles, creating healthy and vibrant neighborhoods.

project focusThe Strategic Stormwater Solutions for Transit-Oriented Development project investigated whether stormwater management along the Central Corridor could more robustly achieve the communitys redevelopment vision for the corridor. When redevelopment occurs in established urban communities, stormwater management facilities are competing with other site features for limited and valuable space, resulting in stormwater facilities being relegated underground a vast majority of the time. Since 2011, 92 percent of Saint Paul redevelopment sites along the Green Line requiring stormwater management placed stormwater below ground for

the purpose of slowly releasing the water into the Citys storm sewer system. When this happens, an opportunity to use stormwater to create a green, sustainable and vibrant community is lost.

The study provides a stormwater management framework for the implementation of shared, stacked-function green infrastructure (SSGI) a system in which stormwater runoff generated from multiple parcels is jointly treated in shared green infrastructure. Communities both locally and nationally are incorporating green infrastructure into their stormwater management toolbox. Green infrastructure uses landscape features and/or natural processes to manage and/or treat stormwater in a manner that provides environmental benefits. The green infrastructure is designed to enhance the urban fabric, providing economic, environmental and social (triple bottom line) benefits to the community beyond treating stormwater (referred to as stacked-function) thereby galvanizing redevelopment. The study also investigated how public art could highlight stormwater management and green infrastructure along the Green Line. A critical project premise was to develop strategic solutions that were fair, equitable, and provided mutual benefit to all parties involved; otherwise the solution would not be successful or replicable.

SSgi implementationWhile SSGI can be used to assist with the creation of TOD, the development of effective policies and implementation tools is critical to the successful implementation of SSGI. Proposed implementation procedures include:

Draft policy resolutionThe initial policy resolution brought forward should highlight SSGI benefits and how it can assist in the creation of a vibrant, green, and sustainable corridor. To increase policy makers comfort with its use and to

Existing Stormwater Approach on LRT Green Line in Saint Paul

executive Summary

7

Green infrastructure is designed to enhance the urban fabric, providing economic, environmental and social (triple bottom line) benefits to the community beyond treating stormwater (referred to as stacked-function) thereby galvanizing redevelopment.

Strategic StorMwater SolutionS for Transit-Oriented Development final report

refine implementation protocols, it is recommended that the resolution request authorization for SSGI pilot implementation.

perform pilot StudiesSeveral pilot studies should be performed for the purpose of testing and refining the SSGI framework developed in this study. If the pilot studies indicate that SSGI provides development benefits, another policy resolution authorizing the use of SSGI should be brought forward for adoption.

revise regulatory frameworkCurrent stormwater regulations differ across the cities and WMOs. If it is decided to move beyond pilot studies into a long-term implementation mode, existing stormwater rules and local ordinances will likely require modification. Pertinent topics (not necessarily exhaustive) to scrutinize at a finer level of detail would include on-site management, encroachments, code consolidation, and green requirements.

institutionalize SSgi into agency processes The feasibility of SSGI should be discussed between implementing agencies and developers early in the development process, before significant time or funds are invested in developing a traditional site

Strategic Stormwater Solutions for transit-oriented Development

8 chapter number

plan. The implementation of SSGI is not limited to the redevelopment of individual parcels. There are various scenarios that could trigger SSGI feasibility discussions, such as street reconstruction projects, replatting, or development of small area master plans.

SSGI may provide cost-efficient stormwater management for runoff from small parcels that otherwise would not receive treatment in the near future. Therefore, the development of a retrofit program that provides a process to initiate the SSGI feasibility discussion, evaluate opportunities and to identify potential funding mechanisms may be advantageous.

Implementation ToolsThe successful implementation of SSGI entails the creation and use of multiple tools to educate Green Line development stakeholders about TOD benefits that can be achieved through the use of SSGI. The tools also serve to assist agencies with incorporating SSGI feasibility evaluations and implementation as standard practice. The following tools have been developed as base templates that agencies can modify to meet their agencys specific needs and goals.

SSGI ASSESSMEnT TOOLThe assessment tool provides a series of questions that agency staff can ask early in the development process to assess whether SSGI is a tool that can be used to further the goal of TOD for the proposed project at hand.

DECISIOn-MAkInG FLOWCHARTS AnD MATRICESAt times the multitude of options and complexity of funding options can appear to be overwhelming. To assist agency staff, a series of flow charts and matrices templates have been developed that articulate the various funding options currently available.

PILOT PROjECT EDUCATIOnAL & OUTREACH MATERIALSEducational and outreach materials should be utilized to inform Green Line development stakeholders about potential pilot opportunities, if a community is interested in advancing SSGI approaches.

findings and conclusionsIn a highly urban corridor, SSGI represents a balancing of risk, roles, and responsibilities (particularly for city departments) in the context of broader triple-bottom line benefits. Leadership from elected/appointed officials will be necessary to effectively support and advance with this strategic stormwater solution initiative. This may involve adopting resolutions, sponsoring code modifications, or other similar actions.

flexibility Supports VisionStormwater management is currently performed on a parcel by parcel basis and segregated between private and non-private ownership. This is done to address mandates for on-site compliance, manage risk exposure for long term maintenance demands, and simply due to the fact that urban parcels redevelop in a sporadic manner making it difficult to coordinate shared facilities. In practice, the status quo results in development managing stormwater underground .

Yet, there are key events such as the construction of major infrastructure projects like light rail transit that trigger concentrated redevelopment where sharing of stormwater facilities may be feasible and conducive to the creation of desired TOD. This is of

executive Summary

9Strategic Stormwater Solutions for tranSit orienteD DeVelopMent final report

particular importance for small, space-constrained, urban redevelopment parcels where numerous programmatic requirements are competing for valuable space. In these situations, flexibility should be provided in the current stormwater management approach to allow for SSGI implementation, if doing so would be beneficial to the City/WMO for purpose of achieving the communitys corridor vision of a green, vibrant, sustainable neighborhood.

Define a processSSGI can be successfully implemented, but will likely involve a case-by-case approach. Therefore, processes must be put in place to assess its feasibility early in the development process. Tools must also be in place to assist agency staff and developers to efficiently structure a SSGI approach that creates a balanced approach for funding and risk management. These processes and tools must be general enough to work across a variety of possible development scenarios while acknowledging many stakeholders may potentially participate.

The SSGI Assessment Tool (in combination with an outreach brochure) is essential to establish a structured dialogue to identify where a potential project may be feasible, while also maintaining baseline expectations for stormwater management.

Development Scale is importantWhile there are likely more, this study identified four SSGI approaches (Parks, Parking, Alleys, and Street Right-of-way) that successfully provide triple bottom line benefits supportive of TOD. The study indicated that several of these approaches lent themselves more strongly to a particular scale of development (.i.e., small parcels versus urban villages).

potential for financial balanceGovernment units have broad authority and multiple options to raise revenue for SSGI costs. This will likely require significant political leadership. Yet a financially neutral funding source is preferable, rather than sequestering funds solely from one municipal department.

Regardless of funding source, compared to estimated costs for stormwater facilities on an individual parcel basis, SSGI estimated costs result in net capital cost efficiencies overall. However, consideration must be given when determining funding sources and developing cost recovery approaches for SSGI to ensure a balanced distribution of costs and benefits. Specifically SSGI implementation will place a significant emphasis on the use of Development Agreements to establish acceptable requirements, fees, noncompliance recourses, and other practicalities.

be opportunistic

Runoff from untreated, small parcels that otherwise would not redevelop (i.e. receive stormwater management) in the near future can be effectively included in SSGI projects. SSGI provides an approach to opportunistically realize excess capacity in stormwater treatment in a cost effective manner. This is very useful in a corridor where overall redevelopment is very incremental (especially small sites) and public land control is very limited. As well, excess treatment capacity potentially can be a brokered commodity. This may warrant the discussion or development of a retrofit program to capitalize on these opportunities when they arise.

The many separate initiatives designed to maximize the Corridors potential are starting to link together in significant ways...This plan will provide a critical tool for creating the vibrant, green and sustainable spaces envisioned in the station area plans-- while improving the quality of the Mississippi River.

-Mayor Christopher B. Coleman letter to Stakeholder Advisory Committee, August 2012.

MINNEHAHA CREEKWATERSHED DISTRICT

RICE CREEK CAPITOL REGION

CAPITOL REGION

CAPITOL REGION WATERSHED DISTRICT

LOWER MISSISSIPPI RIVER

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MISSISSIPPI WATERSHED MANAGEMENT ORGANIZATION

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Currently under construction, Metro Transits Light Rail Transit Green Line (also known as the Central Corridor) will run 11 miles from Target Field in downtown Minneapolis, Minnesota, to Union Depot in downtown St. Paul, Minnesota, beginning in 2014 (see Figure 1.1). The corridor is host to a wide variety of land uses, such as the highly urban downtown cores of Saint Paul and Minneapolis, the Minnesota State Capitol, the University of Minnesota Twin Cities Campus, industrial and retail uses, and multi-family and single-family residences. A vast majority of the corridor is covered with impervious surfaces, resulting in few parks or green spaces along the corridor. The corridor also

hosts a wide range of socio-economic conditions and is a key gathering location for, and home to, a diverse array of ethnic communities, creating a rich cultural resource for the community.

project focusThe Strategic Stormwater Solutions for Transit-Oriented Development project investigated whether stormwater management along the Central Corridor could more robustly achieve the communitys redevelopment vision for the corridor. When redevelopment occurs in established urban communities, stormwater management facilities are competing with other site

features for limited and valuable space, resulting in stormwater facilities being relegated underground a vast majority of the time. Since 2011, 92 percent of Saint Paul redevelopment sites along the Green Line requiring stormwater management placed stormwater below ground for the purpose of slowly releasing the water into the Citys storm sewer system (see Figure 1.2). When this happens, an opportunity to use stormwater to create a green, sustainable and vibrant community is lost.

The study provides a stormwater management framework for the implementation of shared, stacked-function green infrastructure (SSGI) a system in

project focus partners, funding and timeline corridor redevelopment goals Stormwater Management along the corridor

introductionchapter 1

lrt green linewatershed boundary

Municipal boundary

university of Minnesota

Figure 1.1 Corridor Map

Stacked Green Infrastructure

Shared ++ vibrant spaces for enhanced environmental health and community livability

=

Increase location efficiency so people can walk and bike and take transit

Boost transit ridership and minimize traffic

Provide a rich mix of housing, shopping and transportation choices

Generate revenue for the public and private sectors and provide value for both new and existing residents

Create a sense of place

TOD is really about creating attractive, walkable, sustainable communities that allow residents to have housing and transportation choices and to live

introduction

11Strategic StorMwater SolutionS for Transit-Oriented Development final report

which stormwater runoff generated from multiple parcels is jointly treated in shared green infrastructure. The green infrastructure is located and designed to provide economic, environmental and social (triple bottom line) benefits to the community beyond treating stormwater (referred to as stacked-function see Figure 1.3). The study also investigated how public art could highlight stormwater management and green infrastructure along the Green Line. A critical project premise was to develop strategic solutions that were fair, equitable, and provided mutual benefit to all parties involved; otherwise the solution would not be successful or replicable.

partners, funding and timelineThe study was facilitated by the City of Saint Paul and was funded through a Sustainable Communities Regional Planning grant from the U.S. Department of Housing and Urban Development (administered by the Metropolitan Council) and through a grant from the MWMO.

A 20-member Stakeholder Advisory Committee (SAC) was established for the project. Committee members represented various departments in the Cities of Saint Paul and Minneapolis, the Capitol Region Watershed

District (CRWD), the Minneapolis Watershed Management Organization (MWMO), the University of Minnesota, the Saint Paul Riverfront Corporation, and the Metropolitan Council. The Stakeholder Advisory Committee met fourteen times over a 20-month period (February 2012 to September 2013) to provide insight and advise the project team.

corridor redevelopment goalsSixty percent (6.2 miles) of the Green Line lies within the municipal boundaries of the City of Saint Paul. The other 40 percent (4.8 miles) of the Green Line lies within the City of Minneapolis. The University of Minnesota Twin Cities campus comprises 1 mile of Minneapolis 4.8-mile segment. As these agencies have planned for this new LRT line, the implementation of TOD emerged as a primary redevelopment goal for the Central Corridor.

The Center for Transit-Oriented Development (CTOD) provides the following definition of TOD:

Transit-oriented development is often defined as higher-density mixed-use development within walking distance or a half mile of transit stations. Transit-oriented development projects should also:

Figure 1.3 SSGI relation to benefits

Figure 1.2 Existing Stormwater Approach on LRT Green Line in Saint Paul

12 chapter number

corridor redevelopment goals

convenient, affordable, pleasant liveswith places for our kids to play and for our parents to grow old comfortably.

In essence, TOD enhances livability. For the purposes of this report, these two terms will be used interchangeably.

Saint paulTraversing the corridor from east to west, the Saint Paul segment of the corridor starts in, and runs through, the heart of downtown Saint Paul, past the Minnesota State Capitol, and then follows University Avenue to the western municipal limits. Numerous parcels along University Avenue are currently underperforming and are ready for redevelopment. With 14 of the 18 new stations along the Green Line lying within the Saint Paul municipal limits, the City and partnering organizations have been activity planning for anticipated redevelopment along the line.

Previous City-led Central Corridor planning efforts highlight the Communitys desire for TOD, an increase in the number of parks and open spaces along the corridor, and the use of green infrastructure. These previous efforts have continued to build upon each other (see Figure 1.4) and include the following plans and studies:

Central Corridor Development Strategy plan

Central Corridor station area plans (10 plans for stations along University Avenue; plus, one plan addressing all of the downtown stations)

Mitigating the Loss of Parking in the Central Corridor study

Saint Paul Transit-Oriented Development Guidebook for the Central Corridor

These City adopted plans call for the evaluation and revision, if appropriate, of existing policies such as stormwater management to better support the Citys vision for the Central Corridor. Additional efforts to facilitate desired development include:

Development of a Central Corridor Overlay District

Creation of the Traditional Neighborhood 4 Zoning District that will facilitate higher density development, reduce parking demand, and create a more of a pedestrian- and transit-oriented environment

Rezoning of parcels along of the Central Corridor.

In addition to the previous planning and zoning efforts, and concurrent with this plan, a park creation analysis is underway. The Minnesota Chapter of the Trust for Public Land, with participation from city partners, is spearheading the Green Line Parks and Commons Initiative.

The many separate initiatives designed to maximize the Corridors potential are starting to link together in significant ways....This plan will provide a critical tool for creating the vibrant, green and sustainable spaces envisioned in the station area plans-- while improving the quality of the Mississippi River.-Mayor Christopher B. Coleman letter to Stakeholder Advisory Committee, August 2012.

Figure 1.4 Corridor Planning Efforts

MinneapolisFrom east to west, the City of Minneapolis segment of the Green Line traverses University Avenue, the University of Minnesota campus and downtown. The City is experiencing significant redevelopment activity within, and adjacent to, the University. The downtown segment is also experiencing significant redevelopment as this section of the corridor is also a part of Metro Transits Blue Line that has been operating for approximately eight years. The Citys comprehensive plan, along with area planning studies, call for increased density, enhanced sustainability and improved connectivity all of which are components of TOD.


Stormwater Management along the corridor

Stormwater Management along the corridorWhile providing triple bottom line benefits to the community, new TOD must also meet current stormwater treatment regulations. Stormwater requirements along the corridor are currently met on a parcel by parcel and a project by project basis with stormwater regulations varying based on jurisdictional standards and site size. As depicted in Figure 1.1, the Saint Paul segment lies within the jurisdiction of the Capitol Region Watershed District (CRWD), while the Minneapolis segment of the Green Line lies within the jurisdiction of the Mississippi Watershed Management Organization (MWMO). Both watershed organizations have a regulatory role as well as an advocacy and partnering role for stormwater management.

Saint Paul and Minneapolis are both Phase I permittees under the National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) program. While several communities nationally are exploring green infrastructure to reduce wet weather flows to combined sewer systems, that driver is not a significant local issue as both Saint Paul and Minneapolis have predominantly separated their stormwater and sanitary sewer systems. The green infrastructure focus is to enhance the urban fabric by achieving multiple benefits in a spatially constrained environment, thereby galvanizing redevelopment.

An exemplary first step towards green infrastructure along the corridor occurred with the construction of the Green Line itself. The City of Saint Paul and

partnering agencies collaborated to construct a stormwater tree trench system almost 5 miles in length on both sides of the light rail. Runoff from the public right-of-way was used to irrigate 1,200 newly installed street trees along the corridor. This outcome resulted from viewing runoff as a resource that could be used to support environmental health and overall livability. Not only will this water support the long-term health and vitality of the urban forest, it will also reduce the quantity, and improve the quality, of water reaching the Mississippi River. In addition, healthy and mature street trees provide environmental benefits such as carbon sequestration and reduced heat island

effects, while also creating a shady, comfortable environment that is supportive of walking. Due to active coordination between all parties involved, this street right-of-way now successfully accommodates numerous transportation, utility, environmental and social uses. Influenced by this creative approach, the study hypothesized that stormwater could be innovatively used to achieve new community-desired, vibrant, green spaces along the Central Corridor while still meeting stormwater regulations.

Figure 1.5 Excerpt from Rooting Out Pollution Poster Source : Capitol Regions Watershed

14 chapter number

Set the foundation explore opportunities evaluate and Select options work through the Details

project approachchapter 2

Strategic Stormwater Solutions for Transit-Oriented Development included both policy and technical evaluations. The study was organized into the following four phases, forming a replicable approach for other similar regions with TOD to consider:

Set the Foundation

Explore Opportunities

Evaluate and Select Options

Work through the Details

Set the foundationThis phase of the study focused on establishing an information base that the following phases would be built on. Select Phase One work tasks included issues identification, along with framing concepts and capabilities. For other regions considering replicating this initiative, it will be important to explore their own definitions and authorities, as this can vary based on community context, needs, and preferences.

Shared, Stacked-function green infrastructure (SSgi) DefinitionGovernmental agencies across the country are looking for techniques to improve environmental health and community livability. Agencies are also looking for more efficient approaches to delivering community services. This project developed the concept of shared, stacked-function green infrastructure (SSGI) as a stormwater management approach that addresses environmental health, community livability and cost efficiencies within current statutory standards (see Figure 2.1)

SharedWhen redevelopment occurs in older, established urban communities such as the Central Corridor, buildings, open space, surface parking, streets, alleys and stormwater facilities are all competing for limited and valuable space. In response to this situation, stormwater is typically being managed in expensive underground facilities that are quite large in order to meet water quantity and/or rate control requirements. In addition, most of the recently constructed facilities do not integrate stormwater with reuse or other features that could support corridor enhancements. This study hypothesized it would be beneficial to construct shared stormwater facilities that collect and treat runoff from multiple parcels (both smaller and larger than one acre). These shared facilities could provide cost efficiencies, enable runoff/pollutant reduction for small parcels that otherwise may not require such treatment, and provide substantial water supplies that could be reused to improve the environmental and social character of the corridor.

Stacked-FunctionThis study hypothesized the space used for stormwater management, along with the captured stormwater runoff itself, can be used to provide triple bottom line benefits to the corridor beyond stormwater management, thereby creating a stacked-function. For example, economic benefits can be achieved when space can be used to accommodate multiple functions such as stormwater facilities and parking facilities. Environmental benefits are realized when stormwater facilities mimic the natural hydrologic

cycle or introduce new habitat into the urban environment. Social benefits result from the provision of new street trees and open spaces that improve corridor livability. In addition, when stormwater facilities are placed below ground, the community loses their understanding and personal experience with natural systems.. Also lost is the opportunity to learn about the environmental impacts associated with increased impervious surfaces. By expressing stormwater management on the surface or using stormwater to support environmental benefits, a richer and meaningful environment is created.

The goal of this study was to identify feasible stormwater stacking opportunities that:

Merged triple bottom line uses with stormwater facilities to make efficient use of valuable urban land.

Reused captured stormwater runoff to enhance the environmental health and corridor livability.

Provided opportunities to interpret, educate and celebrate water in the corridor through the artful design of stormwater facilities.

Green InfrastructureBoth nationally and locally, there is a movement towards the use of green infrastructure to manage stormwater. Several representative definitions of green infrastructure follow:

Green infrastructure uses vegetation, soils, and natural processes to manage water and create healthier urban environments. At the scale of a city or county, green infrastructure refers to the patchwork of natural areas that provides habitat, flood


Set the foundation

protection, cleaner air, and cleaner water. At the scale of a neighborhood or site, green infrastructure refers to stormwater management systems that mimic nature by soaking up and storing water. (United States Environmental Protection Agency)

Green infrastructure is strategically planned and managed networks of natural lands, working landscapes and other open spaces that conserve ecosystem values and functions and provide associated benefits to human populations. (The Conservation Fund)

Stormwater management approach that utilizes natural landscape features and hydrologic processes to treat stormwater by infiltrating, evapotranspiring, and/or reusing runoff. Green infrastructure also achieves other environmental goals such as carbon sequestration, reductions in urban heat island effect, improved air quality, improved wildlife habitat and increased opportunities for outdoor recreation. (Capitol Region Watershed District)

While there are variations between these definitions, they all consistently state that green infrastructure uses landscape features and/or natural processes to manage and/or treat stormwater in a manner that provides environmental benefits. Green infrastructure aligns well with the vision for a revitalized central corridor that includes new green spaces along the corridor, along with environmentally sound and sustainable redevelopment.

potential SSgi implementation barriersMany of the potential SSGI implementation barriers identified by the SAC and a developer focus group revolved around long-term risk management and associated cost implications. The investigation quickly raised a number of logistic issues that a successful SSGI implementation approach must address, such as:

Where will the SSGI be located and who will own the property?

Who will administer, operate and maintain the SSGI?

Can SSGI facilities be constructed in a phased manner to coincide with phased redevelopment?

How can the initial SSGI construction be funded in a fair and equitable manner?

How can the SSGI long-term operations and maintenance be funded in a fair and equitable manner?

What contingency plans are needed in case redevelopment doesnt occur, or only partially occurs?

Will SSGI work within the existing statutory framework?

The study quickly concluded that a one size fits all may not be a realistic SSGI implementation approach. The variable ways in which SSGI can be implemented lends to a case-by-case evaluation. However, general frameworks are needed to help guide implementation feasibility discussions.

Figure 2.1 Definition of SSGI

right-of-way considerationsOften, off-site stormwater management is construed as possibly involving the public right-of-way. Cities are the stewards of the right-of-way as the public right-of-way supplies a benefit to the civic community at large. The right-of-way must accommodate a variety of public needs, such as transportation facilities (e.g., streets, sidewalks, and transit), above and below ground utility services (e.g., water mains, sanitary sewers, electric, gas, and cable services) and environmental enhancements (e.g., street trees and ground vegetation). Frequently, these various public uses are competing for the limited space available within the right-of-way. Therefore, the addition of any non-public use within the right-of-way involves significant risk for any governmental agency responsible for the public right-of-way.

Both Minneapolis and St. Paul have long-standing processes to evaluate and control uses proposed for the right-of-way that may have direct benefit to only a limited group. Encroachment Permits are issued only when it can be clearly demonstrated that a private need cannot be met within private property.

The public right-of-way provides possible real estate for hosting shared stormwater management. However, the placement of shared stormwater facilities in the right-of-way must provide public services and value beyond simply benefiting the developer.

Figure 2.2 Governmental Authority

Set the foundation

Developers focus groupOver the course of the project, the project team met with select developers with project experience in the Cities of Saint Paul and/or Minneapolis. The focus group indicated that sharing stormwater facilities between private developments and public agencies is the preferred approach versus sharing occurring solely between private developments. This is primarily due to perceived risk by developers and their financiers. The group also stated adjacencies to open space provide value to residential and retail developments through increased rents or unit sale prices. Finally, they indicated that predictive development processes are valuable. These insights help inform the development of potential SSGI approaches.

governmental authority relating to Stormwater infrastructureCurrent statutes provide cities, watershed districts and joint powers Watershed Management Organizations (WMO) authority to require stormwater management as a condition of subdivision or building activities. These governmental entities also have authority to acquire land and to construct, operate and maintain stormwater management infrastructure, either individually or in cooperation with other governmental units (see Figure 2.2). The statutes provide governmental units a broad array of options for funding stormwater facilities by raising funds from appropriate parties, which range from utility

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rules and regulations

charges and assessments against targeted or benefited properties to ad valorem tax levies over the entire taxing jurisdiction or an appropriate sub district.

The existing statutory framework provides cities, watershed districts and joint powers WMOs with the key tools they need to implement desired stormwater infrastructure, including SSGI. Additional information regarding governmental authority relating to stormwater infrastructure can be found in Appendix a.

existing Stormwater rules and regulationsExisting stormwater regulations within the corridor was another key project informant. Projects within the corridor generally need to meet the regulations of the following agencies:

Cities of Saint Paul and Minneapolis

Capitol Region Watershed District (CRWD)

MPCA via the NPDES General Construction Permit

In addition, the Mississippi Watershed Management Organization (MWMO) has a set of guidelines that need to be adhered to if the project is being funded with a grant from the MWMO.

In general, redevelopment projects along the corridor will need to adhere to the most restrictive regulatory requirement that applies to that site. In all cases, requirements are triggered by a size threshold; each agency has different size criteria. Parcels less than one acre are considered small and generally are not required to achieve runoff/pollutant reduction.

Therefore, dependent on size, the following three stormwater regulatory requirement categories may apply to redevelopment projects.

rate control Controls the rate at which stormwater runoff is discharged from a developed site, typically discharge rates are controlled to existing or presettlement conditions for a variety of storm events.

Volume control Controls the amount of stormwater runoff from a site to encourage groundwater recharge, limit impacts to downstream systems, and remove soluble nutrients from runoff discharged from the site.

water Quality Refers to the removal of specified pollutants to a designated level.

Additional information on the stormwater management regulations that applied to the corridor during the course of this study can be found in Appendix b.

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explore opportunities

Key national StudiesPrevious Central Corridor studies were reviewed to gain a clear understanding of Saint Pauls and Minneapolis redevelopment visions for this corridor. In addition, reviews were preformed over the course of the project of national studies related to SSGI. Several concurrent studies of particular interest titled, River north: Area Wide Green Infrastructure Study (Wenk Associates, 2013), Creating Clean Water Cash Flows (Natural Resources Defense Council, EKO Asset Management Partners, the Nature Conservancy, 2013) and Banking on Green (American Rivers, the Water Environment Federation, the American Society of Landscape Architects, ECONorthwest, 2012) were all investigating variations of SSGI, which affirmed this is an issue of interest across the country.

These national studies consistently indicated that green infrastructure was less expensive to construct than traditional gray infrastructure, regardless of scale.

The studies also illustrated that new models for stormwater management must be initiated through leadership within municipal government.

Other regions can use these national studies to help inform replicability but communities should also evaluate their own local precedents.

review of national and local precedentsConceptually, shared, stacked-function stormwater management is not a new approach. Historically, for new developments in growing municipalities, the term regional pond was often used to describe a similar situation where one stormwater facility was built by a city for the benefit of many parcels, and by virtue of size may also provide passive recreational amenities and/or wildlife habitat. In other instances, smaller developments built common (shared) ponds in outlots, owned by Homeowner Associations. (However, often the outlot would go into tax-forfeiture and become owned by a city.)

SSGI builds on this general concept but seeks to employ it on a much smaller scale in a fully developed environment. Examples of SSGI can be found both locally and nationally. The following precedent projects were examined in more de

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