HomeMy WebLinkAboutSection 5: Implementation
5.0 Section 5 - Implementation
5.1 Introduction
The Implementation Section is intended to provide guidance in carrying out
the plan objectives. The implementation program summarizes a schedule and
cost of recommended actions. Lastly, procedures for amending the plan are
discussed. Table 13 summarizes the implementation schedule for the St.
Joseph Stonn Water Management Plan,
Table 13
St. Joseph SWMP Implementation Summary
""" IJ') \0 t- oo a-,
0 0 0 0 0 0
0 0 0 0 0 0
N N N N N N
Adopt St. Joseph SWMP X
Assessment of Problem Areas X X
Pond Design Standards and Developer Guidelines X X X X X X
Administer Land Use Controls X X X X X X
Capital Improvements X X X X X X
Storm Water Utility or Other Financing Methods X X X X X X
Information and Education X X X X X X
5.2 Implementation Priorities
The implementation plan includes the identification and prioritization of
capital improvements, administration, permitting, plan amendments, public
education, and operation and maintenance. Prioritization of improvements
will be based on a review of all recommended actions.
The current estimate of stonn water related expenditures have been made.
The activities have been distributed throughout a 5-year implementation plan
extending though 2008. The Capital Improvement Plan (CIP) is summarized
in Table 14.
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Project
Water Quality
Improvement
Projects
GIS System Setup
for SW Mgmt
Property Easements
and Aquisitions
NPDES Permit
Program
NPDES Reporting
and Evaluation
Best Management
Practices Outfall
Pgm.
Storm Water Management Plan
St. Joseph, Minnesota
Table 14
Capital Improvement Plan
Project Description
Evaluation and construction of water
quality treatment for subwatersheds
Preliminary
Project Cost
Estimate
$100,000
Date(s) of
Implementation
2004-2008
-
Update GIS database for SW Mgmt $10,000 2004-2005
needs
Purchase easements or property for $90,000 2005-2008
storm water management
MS4 and Construction permit $56,000 2004-2008
compliance activities
Annual permit reports; Evaluation of $35,000 2004-2008
program
Update storm sewer outfalls to $50,000 2004-2008
improve water quality
Total
$341,000
The CIP plan anticipates storm water management activity throughout the
City.
Future projects related to the storm sewer and ponding improvements have
also been estimated. These costs are not included in the CIP above, however
Tables 17 and 18 show a summary of the estimated costs for these
improvements, These estimates should not be interpreted as a commitment
by the City to build all of these ponds in the short term, however over the
long term these improvements will serve the purpose of storm water routing
as land development progresses. The storm sewer and ponds are a suggested
course of action that will accomplish the major goal of this plan, to
accommodate growth and redevelopment in the community while protecting
the environment and water resources.
The cost estimate for the construction of the proposed ponds does not include
land acquisition or easement acquisition. The cost also does not take into
account if a feasible study will be completed or engineering design costs, The
cost does include the larger construction items such as excavation and
restoration. The final project cost may change based on the determination of
scope of work. The Plan anticipates some kind of storm water activities at all
locations. The Plan has identified storm water ponds for the purpose of
developing cost estimates and budgeting purposes only. This should not be
interpreted as a commitment by the City to build a pond at all of these
locations, especially where private property is involved.
Table 15 includes annual operating and maintenance costs, which are
separate from capital expenditures.
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Table 15
Operating Costs
Project Project Preliminary Date(s) of Comments
Location Description Project Cost Implementation
Estimate
Public Education Updating and managing $19,000 2004-2008
and Outreach web page, and distribution
of newsletter
Storm Sewer and Cleaning and maintenance $100,000 2004-2008
Pond Maintenance of storm sewer and ponds
Street Sweeping Sweeping the streets twice a $50,000 2004-2008 Assumes City labor and
year equipment, no contract
sweeping.
Total $169,000
The Implementation Plan should be reviewed on an annual basis, At that
time, each proposed improvement is to be reconsidered, City budgets
adjusted, and additional improvements added to the program.
5.3 Cost/Benefit for Pollutant Removal
Storm water BMPs as described in this Report are the primary tool to
improve the quality of urban streams and meet future NPDESPhase II
requirements. The BMPs include both structural and non-structural
alternatives. Resources and references on BMPs can be found in Appendix
M. The SWMP suggests the construction of detention ponds as theBMP for
future urban stormwater pollution control.
The term 'structural BMP' refers to a physical facility designed and
constructed to remove pollutants from stormwater runoff, potentially reduce
downstream erosion, provide flood control, and promote ground water
recharge. Typical structural BMPs include:
· Detention basins
· Retention basins
· Constructed wetlands
· Infiltration practices
· Filters
· Biofilters (swales and filter strips)
· Precast or cast-in-place treatment devices
The typical capital costs for BMPs were evaluated based upon a recent U.S,
Environmental Protection Agency document entitled: Preliminary Data
Summary of Urban Stormwater Best Management Practices, (Office of
Water, Washington, D.C. August 1999, EPA~821-R-99-012). Table 16 has
been adapted from the USEPA document (Table 6-1, page 6-3) to show
typical capital construction costs.
While detention ponds have an initial high cost for construction, their annual
operation and maintenance cost is among the lowest of alternatives.
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BMP Type
Retention and
Detention
Basins
Constructed
Wetland
Infiltration
Basin
Sand Filter
Bioretention
Grass Swale
Filter Strip
Table 16
Capital and Maintenance Costs for BMP's
Typical Cost*
($/cf)
0.55 - 1.11
Notes
Annual Maintenance Cost
(% of Construction Cost)
Cost range reflects economies of scale in
designing this BMP. The lowest unit cost
represents approx, 150,000 CF of storage,
while the highest is approx. 15,000 CF.
Little data available to assess cost. It is
assumed they are approx. 25% more
expensive due to plant selection and
sediment forebay requirements than
detention basins.
Represents typical cost for a 0.25-acre
infiltration basin.
3.32 - 6.65 Range in costs largely due to different 11 % - 13%
designs. Of the three most common,
perimeter sand filters are moderate cost
while surface and underground sand filters
are the most expensive.
5.87 Bioretention is relatively constant in cost 5% - 7%
because it is usually designed as a constant
fraction of the total drainage cost.
0.55 Based on cost per square foot, assuming 6 5% - 7%
inches of storage in filter,
o - 1.44 Based on cost per square foot, assuming 6 $320/acre (maintained)
inches of storage in the filter strip. The
lowest cost assumes that the buffer uses
existing vegetation, while highest cost
assumes that sod was used to establish the
filter strip.
* Typical capital cost on a volume basis: August 2001
3% - 6%
0.66 - 1.38
< 1%
1.44
5% - 10%
Table 17 shows the construction cost estimate for the developed conditions
treatment ponds.
The total cost construction cost for the 96 stonn water treatment ponds is
$4,86 million. This equals an average of $50,600 for each pond. Of that
amount, 55 percent is for the earthmoving costs and 32 percent covers
restoration costs with a mix of native and domestic seed mixes. These
estimates may be high, assuming that the developer will be able to balance
the earthwork quantities to economize on the projects. The unit cost
assumptions are included on the table for comparison with other costs.
Table 18 shows the construction cost estimate for the developed conditions
regional stonn sewer lines. The stonn sewers were routed together in 14
regional systems, shown in Figure 19. These regional systems were used for
grouping the stonn sewer cost estimates. The total cost for the developed
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conditions storm sewer construction is $9,59 million, This equals an average
cost of $685,000 for each of the systems.
The storm sewer pipe sizes range :trom 18 to 78 inches, The larger pipes
would be for large trunk storm sewer lines that serve large areas. The unit
cost assumptions are included on the table for comparison with other costs.
The economic benefit is difficult to quantify :trom "balance sheet"
perspective for BMPs. The ideal approach would specify a chain of events:
pollutant loading reductions from construction of the ponds; the physical-
chemical properties of the receiving streams and consequent linkages to
biologic/ecological responses in the aquatic environment; and human
responses and values associated with these changes. The necessary data does
not exist to conduct such analysis, Instead, the benefits can be outlined in
terms of:
1, Effectiveness of reducing pollutant loads;
2. Direct water quality impacts; and
3. Economic benefits or costs.
The primary function of the proposed detention ponds is to reduce pollutants.
They are very effective at removing total suspended solids (often 90
percent + efficiency), total phosphorus (up to 60 percent removal) and other
associated pollutants (heavy metals and hydrocarbons), Thus, their track
record and performance has been documented in various studies, but must be
constructed properly and maintained.
5.4 Amendment Procedures
The S1. Joseph Storm Water Management Plan is intended to extend through
the year 2010. For the plan to remain dynamic, an avenue must be available
to implement new information, ideas, methods, standards and management
practices. Persons either residing or having business within the City shall be
able to request amendment proposals at any time.
5,5 Request for Amendments
Written requests for plan amendment are submitted to the City staff, The
request shall outline the need for the amendment as well as additional
materials that the City will need to consider before making its decision.
5.6 Staff Review
A decision is made to the validity of the request. Three options exist;
1. Rej ect the amendment
2, Accept the amendment as a minor issue, with minor issues collectively
added to the plan at a later date
3. Accept the amendment as a major issue, with major issues requiring an
immediate amendment. In acting on an amendment request, staff shall
recommend to City Council whether or not a public hearing is warranted,
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5.7
5.8
5.10
5.11
5.11.1
5.11.2
Storm Water Management Plan
St. Joseph, Minnesota
Council Consideration
The amendment and the need for a public hearing shall be considered at a
regular or special Council meeting. Staff recommendations should also be
considered before decisions on appropriate action(s) are made.
5.9
Public Hearing and Council Approval
This step allows the public input based on the public sentiment. Council shall
determine when the public hearing should occur in the process. Based on the
public hearing, Council could approve the amendment, and, if necessary,
refer the amendments to the Watershed District Board for comment and
approval.
Council Adoption
Final action on an amendment following approval by the RCWD is Council
adoption. However, prior to the adoption, an additional public hearing could
be held to review the plan changes and to notify the appropriate stakeholders.
Annual Report to Council
A brief annual report should be made by City staff summarizing development
changes, capital improvements, and other water management-related issues
that have occurred over the past year. The review should also include an
update on available funding sources for water resource issues. Grant
programs are especially important to review since they may change annually.
These changes do not necessarily require individual amendments. The
reports can, however, be considered when the plan is brought up to date. The
report should be completed by June 1 st of each year to allow implementation
items to be considered in the normal budget process. Copies of the report
should be filed with the RCWD. The annual update can also serve as an
important public information tool. A summary could be published in the
City's newsletter.
NPDES, Phase II
Construction Permit
Currently, an NPDES (National Pollutant Discharge Elimination System)
General Storm Water Permit for Construction Activity [#MNRI00001] is
required to be obtained by any person disturbing one or more acres of land
within the city of S1. Joseph, This permit application is submitted to the
MPCA.
MS4 Permit
On March 10, 2003, MPCA issued final Phase II storm water regulations that
apply to the City of St. Joseph [#MNRS80000]. The regulations require
compliance with the following six minimum measures under the Municipal
Separate Storm Sewer System (MS4) permit:
1. Public Education and Outreach on Storm water Impacts,
2. Public Involvement/Participation,
3. Illicit Discharge Detection and Elimination,
4. Construction Site Storm water Runoff Control,
5. Post-Construction Storm Water Management in New Development and
Redevelopment, and
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5.12
Storm Water Management Plan
St. Joseph, Minnesota
6. Pollution Prevention/Good Housekeeping for Municipal Operations.
GIS
St. Joseph does have GIS (Geographic Information System) data for the City.
The GIS data includes information on roads, parcels, existing and future land
use, water and zoning,
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