SRF SPONSORED PROJECT APPLICATION
INDIANOLA, IOWA September 1, 2017
Clean Water SRF WATER RESOURCE RESTORATION Sponsored Projects
APPLICATION COMPLETENESS CHECKLIST
Pre-application consultation held July 5, 2017* (date – must be prior to July 1, 2017) Hard copy and CD containing electronic files postmarked by September 1, 2017 Application signed by authorized official If electronic files submitted via e-mail, sent by 4:00 p.m. on September 1, 2017 CWSRF wastewater project is eligible Acquisition of Property Form signed by authorized official Authorizing resolution passed by the wastewater utility’s governing board for the sponsored project application Identification of any third-party entity involved and the potential need for a 28E agreement between the utility and the qualified entity Identification of water quality organization or organizations involved in the project, with a discussion of the organization’s participation in project design, selection, and implementation Letters of support from project partners Letter from the wastewater utility’s bond counsel indicating concurrence with the sponsored project concept Assessment of the impacted waterbody and its watershed with data that supports the identification of the water quality problems to be addressed Discussion of project goals and objectives Evaluation of possible water quality practices that could be implemented, considering the unique demographic, topographic, hydrologic, and institutional characteristics of the planning area Description of potential practices to be implemented with the expected water quality outcomes
Discussion of project locations, land ownership, and any plans for acquiring properties or easements Identification of any other organizations or resources to be involved in the project and their expected contributions Proposed project schedule with major milestones, along with a discussion of how the sponsored project construction schedule coordinates with the infrastructure project schedule Proposed evaluation procedures and measures Explanation of the proposed budget, including other planned funding sources and flexibility to adjust budget according to final amount available through sponsored project mechanism
* Pre-application consultation held after July 1, 2017 due to staff vacations.
Section 3: Information on the Identified Watershed and Water Quality Issues (Summarize the information here and expand or add documentation, maps, monitoring data, and other data in the project conceptual plan attached to this application as shown in Section 7.)
Name of Waterbody: Middle River and South River HUC Number and Name Middle River: 0710000807 (where both wastewater utility South River: 0710000812 and waterbody are located): Uses for the Waterbody (e.g. Class A-1, Class B, Class HH recreation, drinking water, Recreation, boating, fishing, drinking water other): Water Quality Concerns (e.g. Bacteria, sediment, erosion and turbidity sediment, bacteria, nutrients): Sources of Water Quality Iowa DNR Data (e.g. DNR water monitoring, IOWATER, US Geological Survey, utilities, other): Nonpoint Source Uncontrolled urban stormwater, soil erosion and nutrient Contributions to Water application Quality Concerns (e.g. urban stormwater, soil erosion, livestock operations, other): Primary Water Quality Goal Reduce peak and total runoff. Improve water quality. of the Sponsored Project:
Section 4: Brief Summary of Proposed Water Resource Restoration Sponsored Project Describe the scope of the proposed project (i.e., specific solution to the water quality problem). Summarize the process of analyzing and selecting the most appropriate nonpoint source practices relating to the unique issues and characteristics of the identified waterbody and planning area. Provide additional detail in the attachments to this application. Multiple spot improvements to install BMPs to increase filtration and infiltration, reduce peak and total flows and pollutant discharge in runoffs.
Section 5: Water Quality Organization(s) Involved in Project Planning Organization Contact Person Email Address City of Indianola Ryan Waller [email protected] IDALS Derek Namanny [email protected] IDALS James Martin [email protected] Warren County Soil & Delbert Kaldenberg Water Conservation District Snyder & Associates, Inc. David Moeller [email protected] Iowa DNR Andy Asell [email protected]
Section 6: Qualified Entity Information Is the applicant proposing to enter into an agreement with a qualified third party entity to implement the sponsored project? No
Yes Organization:
Section 7: Sponsored Project Cost Cost Category Total Estimated Costs to be Costs to be Project Costs Covered from Allocated from Other Funds Up to 1% of SRF Loan Interest Land and Easements Relocation Expenses Professional Planning Fees Professional Design Fees $15,000 $4,000 $11,000 Professional Construction Fees $8,000 $8,000 Construction $271,000 $10,000 $261,000 Equipment Miscellaneous Bond Counsel Fees Contingencies $31,000 $1,000 $30,000 TOTAL $310,000
Section 8: Attachments Attachments must be submitted with the application. Applications will not be considered complete unless all required attachments are submitted. Authorizing resolution passed by the wastewater utility’s governing board for the sponsored project application; Letters of support from project partners; Letter from the wastewater utility’s bond counsel indicating concurrence with the sponsored project concept; Project conceptual plans, including: o Assessment of the impacted waterbody and its watershed with data that supports the identification of the water quality problems to be addressed o Discussion of project goals and objectives o Evaluation of possible water quality practices that could be implemented, considering the unique demographic, topographic, hydrologic, and institutional characteristics of the planning area o Description of practices to be implemented with the expected water quality outcomes o Discussion of project locations, land ownership, and any plans for acquiring properties or easements o Identification of any other organizations or resources to be involved in the project and their expected contributions o Proposed project schedule with major milestones, along with a discussion of how the sponsored project construction schedule coordinates with the infrastructure project schedule o Proposed evaluation procedures and measures Explanation of the proposed budget, including other planned funding sources and flexibility to adjust budget according to final amount available through sponsored project mechanism
Section 9: Acquisition of Property – Required Form
U.S. ENVIRONMENTAL PROTECTION AGENCY ASSURANCE WITH RESPECT TO REAL PROPERTY ACQUISITION OF TITLE III OF THE UNIFORM RELOCATION ASSISTANCE AND REAL PROPERTY ACQUISITION POLICIES ACT OF 1970 AS AMENDED
The City of Indianola (Applicant) hereby assures that it has authority under applicable State and local law to comply with Section 213 of the Uniform Relocation Assistance and Real Property Acquisition Policies Act of 1970, Public Law 91-646, 84 Stat. 1894 (42 U.S.C. 4601) as amended by the Surface Transportation and Uniform Relocation Assistance Act of 1987, Title IV of Public Law 100-17, 101 Stat. 246-256 (42 U.S.C. 4601 note) and 49 CFR 1.48(cc); and certifies, assures and agrees that, notwithstanding any other provision set forth in the application.
1. For projects resulting in the displacement of any person: a. It will adequately inform the public of the relocation payments and services which will be available as set forth in Subparts A, C, D and E of 49 CFR 24. b. It will provide fair and reasonable relocation payments to displaced persons as
Table of Contents
Table of Contents
Existing Conditions and Assessment of the Impacted Waterbody and Watershed ...... 1 Project Goals and Objectives ...... 2 Evaluation of possible water quality practices considering unique demographics, topographic, hydrologic, and institutional characteristics of planning area ...... 2 Demographic Characteristics ...... 2 Topographic and Hydrologic Characteristics ...... 3 Institutional Characteristics ...... 3 Description of Practices to be Implemented ...... 3 Urban Conservation Practices ...... 3 Bioretention Cells ...... 4 Rain Gardens ...... 4 Bio Swales ...... 4 Wet Retention Stormwater Wetland ...... 5 Soil Quality Restoration ...... 5 Permeable Pavers ...... 5 Green Roofs ...... 6 Rainwater Harvesting...... 6 Streambank Stabilization ...... 6 Project Locations, land ownership, easements ...... 6 Organizations Involved in the Project ...... 7 City of Indianola ...... 7 Iowa Department of Natural Resources ...... 7 Iowa Department of Agriculture and Land Stewardship ...... 7 Warren Soil and Water Conservation District ...... 7 Warren County Natural Resources Conservation Service ...... 7 Simpson College ...... 7 Indianola Country Club...... 7 Snyder and Associates ...... 8 Project Schedule with Timelines ...... 8 Evaluation Procedures and Measures ...... 8 Explanation of the Proposed Budget ...... 9
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APPENDICES Authorizing Resolution Passed by the Wastewater Utility’s Governing Board ...... Appendix A Letter of Concurrence from the Wastewater Utility Bond Counsel ...... Appendix B Letters of Support ...... Appendix C Site Exhibit...... Appendix D Preliminary Watershed Analysis...... Appendix E Morlock Lift Station Improvements Project Anticipated Schedule ...... Appendix F
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Existing Conditions and Assessment of the Impacted Waterbody and Watershed
The City of Indianola was founded in the ridge line between the Middle and South River. The City has grown into both watersheds with the slight majority of the area draining north to the Middle River, about four miles away, via Cavitt Creek and Plug Run Creek. The south and southeast areas drain to the South River, about two miles away, via Short Creek and several unnamed tributaries.
The section of Middle River receiving runoff water from Indianola has the HUC-10 designation of 0710000807. This section of river has the Use Designations of Class A1 (Recreation Primary Contact), Class B (WW-1) (Aquatic Life Warm Water Type 1), and Class HH (Human Health). According to the Iowa DNR ADBNet database this stretch is currently impaired on the 303(d) listing. There is evidence for partially supporting impairment for the Class A1 and Class B (WW-1) designations due to indicator bacteria E. coli and low biological integrity. The indicator bacteria impairment is based on results of ambient monitoring from 2012-2014 that showed out of 24 samples taken during the two year span, 56% exceeded maximum criterion. The low biological integrity impairment is based on biological sampling during 2002 and 2012-2014 that showed less than ideal scores of biological metrics.
The section of the South River receiving runoff water from Indianola has the HUC-10 designation of 0710000812. This section of river has the Use Designations of Class A1 (Recreation Primary Contact), and Class B (WW-2) (Aquatic Life Warm Water Type 2). According to the DNR ADBNet database this stretch is currently impaired on the 303(d) listing for indicator bacteria E. coli. The indicator bacteria impairment is based on the results of ambient monitoring from 2012-2014 that showed out of 25 samples taken, 52% exceeded maximum criterion.
With both of impairments listed on the rivers, there are multiple factors that can contribute towards the decline in water quality. One of the main contributing factors is the influx of untreated stormwater runoff during rainfall events. Since Indianola is relatively close to these water bodies, there is little opportunity for treatment of the water once it’s outside of city limits. Since Indianola sits at the top of both watersheds, the city will be following the traditional treatment of a watershed by starting at the top and working its way down.
The City has recognized the need for a systemic approach to address the existing storm sewer system. It is recognized that this system should include reduction of peak and total runoff, repair of aging infrastructure and restoration of water quality. The existing infrastructure has aged and deteriorated to failure causing significant erosion, localized flooding and related impacts to water quality. As this has become a problem, the City has contracted with Snyder & Associates, Inc. to provide a drainage masterplan to be completed over a three-year period. The masterplan includes an assessment and inventory of infrastructure and drainage facilities in the City limits. Planning level engineering improvements and recommended policy changes will also be identified. The masterplan will be delivered in Geographic Information Systems (GIS) datasets which will aid the prioritization of LID practices. The City maintains a GIS inventory of parcels, zoning, planimetrics as well as the location of storm sewer inlets, outfalls, and mains.
The initial focus of drainage improvement is repair of failed intakes and storm sewer segments which have caused significant soil loss due to undermining of pipes and intake side walls.
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Improvements include minor repairs like intake replacements done by city crews and major repairs similar to the 2017 drainage improvements currently underway. The initial focus of the masterplan effort is The Cavitt Creek watershed and an unnamed tributary to the South River near South K Street. The focus areas have been determined based on identified problem areas and development opportunities. The sponsored projects will compliment the repairs by adding reduction and restoration practices in the same watershed.
Project Goals and Objectives
The main goal of Indianola applying for a Sponsored Project is increasing the water quality in the Middle and South Rivers via the various tributaries that convey water from the city.
With Indianola’s proximity to the Des Moines Metro, the community is continually growing in size. Historically Indianola has relied on traditional collection and conveyance methods of managing stormwater runoff. This method has resulted in stressing the system and failures of the system in various parts of town. In lieu of installing a larger system with bigger conveyance capacities, the city has begun to look towards Low Impact Development (LID). Indianola recognizes the importance of being good stewards to its downstream neighbors and wants to install LID practices around town to capture and filter stormwater before it leaves the city.
With the current schedule of wastewater upgrades Indianola is anticipating this project is the introduction into the larger anticipated project. The city is anticipating a large wastewater facility upgrade in the coming years, which will result in a large request amount from SRF. While Indianola is relatively new to LID concepts and this initial project is looked at as the “pilot project” to introduce the city and its residents to LID, the city conducted it’s first sustainability fair on April 8, 2017 to promote community-wide sustainability.
Practice locations with water quality benefits, high visibility and high demonstration value will be targeted as an effort to introduce everyone to LID. This introduction will lay the groundwork for the larger project in the coming years by allowing city staff and residents alike to witness these practices in action. In working with previous projects it has been more successful implementing a project when you can reference a local project that people can relate to. This will prove to be valuable in the larger project when the city looks to explore larger projects with other partners around the city.
Evaluation of possible water quality practices considering unique demographics, topographic, hydrologic, and institutional characteristics of planning area
Demographic Characteristics
Low Impact Development practices are a relatively new concept to the City of Indianola. While there will be some upfront outreach and educational efforts required to successfully implement these practices, there remains lots of opportunities to place practices in a location where water quality improvements can be made. The city recognizes the best way to begin a paradigm shift in stormwater management is to lead by example, and by installing practices in key locations the residents can learn about these practices and how they work.
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As part of the outreach campaigns to residents and businesses that would be near or adjacent to the proposed practices, the city will hold public meetings and reach out to the respected entity to ensure they are aware of the project and address any concerns they may have before construction.
Topographic and Hydrologic Characteristics
The City of Indianola occupies the ridge line between the Middle and South rivers and is situated in the soil formation known as the Southern Iowa Drift Plain which is typified by well-defined watersheds and variable depths of loess soil over glacial till. Consequently, there is significant variation in infiltration rates across the community due to the landform so LID practices and effectiveness will be specifically developed for each project location to achieve infiltration goals.
The community experienced much of the established growth prior to 1980 before storm water management practices were established. The drainage system is fairly well developed with nearly 1,200 intakes and over 26miles of storm sewers. In 2013, Iowa DNR’s Watershed Improvement Section, GIS Analyst conducted an initial storm water geospatial modeling for the City. The storm sewer infrastructure locations were combined with high-resolution LiDAR elevational data, City planimetric datasets, and DNR’s 2009 High-resolution Land Cover. These models produced datasets which accurately depict the sub-catchment areas of individual storm sewer inlets. The sub-catchments were the aggregated to produce catchment areas for each storm sewer outfall. For each sub-catchment and catchment area, statistics such as the percentage of impervious surfaces and estimates of storm water runoff were compiled. With this information in hand, the City is poised to precisely determine how much water enters its storm sewer network and where, then make well-informed decisions as to where LID practices are most needed.
Institutional Characteristics
At the time of this application, initial conversations with Simpson College and the Indianola Country Club have commenced as anticipated locations for practices. Additionally, as previously noted, the City is in the process of a 3-year stormwater planning process. This will help identify other locations. Once Indianola is approved for their SRF Sponsored Project the city will move forward with selecting specific sites. Staff from Simpson College has expressed interest in the project and integrating the practices into their curriculum for certain courses offered by the college. This unique partnership provides the potential for student involvement in the project and another avenue for public outreach.
In addition, the City has been in conversations with potential development properties where regional detention and other LID practices may be incorporated. If practices locations are targeted that are not on city owned ground the city will follow the necessary steps to ensure a successful project.
Description of Practices to be Implemented
Urban Conservation Practices Throughout the urban targeted watershed various Low Impact Development (LID) practices will be carefully reviewed and strongly considered for implementation. Certain factors will determine what practices will be feasible, so certain site measures will be performed to ensure the practice functions to design. All LID practices will be designed and sized according to the Iowa Stormwater Management Manual.
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All practices will be sized to capture the Water Quality Volume (WQv) which is the first 1.25” of rainfall in a 24-hour period of time. This rainfall event transports the majority of pollutants to the nearest storm sewer where it then outlets to the nearest body of water. Pollutants transported in storm water include sediments (sand and soil), nutrients (phosphorus and nitrogen), and heavy metals (zinc and lead). Where applicable, LID practices may be designed to capture the Channel Protection Volume (CPv), or the first 2.4” rainfall event in a 24 hour period.
Along with capturing the majority of pollutants, these practices reduce peak flow in receiving streams and rivers, which lead to severe bank erosion. Bank erosion is a major contributor to pollutant loading in Iowa waterbodies. Reducing peak flows in the Middle and South Rivers and partnering the filtering and infiltrating capabilities of the LID practices will provide maximum water quality benefits. Below is a listing of the many LID practices that could be installed as part of this project.
Bioretention Cells
This practice consists of constructing a cell with a shallow depression that temporarily ponds stormwater and allows it to slowly infiltrate into the cell through an engineered soil media and rock layers before discharging it through a sub-drain tile that lines the bottom of the cell. Native prairie plants with deep root structures will be planted into the cell to aid in nutrient and water uptake.
If proposed, bio-retention cells will be installed in various places throughout town adjacent to city streets and impervious areas to capture runoff. This practice will be used in locations that have soils with high clay content that don’t allow storm water runoff to infiltrate into the ground. Locations with existing storm sewer intakes and infrastructure will be targeted as ideal locations to install bio-cells. The existing infrastructure will provide easy access to integrate overflow measures into. Curb cuts will be made in the street to divert stormwater away from the intake and into the bio-retention cell, where it will be filtered and infiltrated before being slowly discharged into the storm sewer system.
Rain Gardens
This practice is a shallow depressed garden to absorb and infiltrate stormwater. Unlike the bio-retention cell that has an engineered subgrade with a tile system and rock chamber, the rain garden requires only a six inch excavation with a ponding surface at the top. If selected, Native prairie plants will be planted in the garden to assist with water evapotranspiration and nutrient uptake. In locations where soils have a higher sand content and are able to absorb rainfall at a minimum of one inch of standing water per hour these practices will be used. Infiltration tests will be performed in selected sites to verify conditions to ensure the practice works according to design.
Bio Swales
This practice consists of constructing an engineered swale by excavating a trench that will be backfilled with a rock aggregate and amended soil media layers. If this is incorporated, a sub-drain tile will be laid along the bottom of the swale that will provide an outlet for the stormwater if the water cannot be absorbed into the native soils below the engineered swale. Deep rooted, low-growing native prairie species will be planted throughout the top of the swale that will assist in water and nutrient uptake, as
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well as provide stabilization throughout the swale to prevent soil erosion. Rock check dams will be installed approximately every 50 feet throughout the cell to slow and temporarily pond stormwater, allowing it to be absorbed. The swale will be designed to infiltrate smaller rainfall events and safely convey large rainfall events.
The proposed bio-swales will be installed in locations where there are already concentrations of runoff during storm events. By utilizing these areas, stormwater diversion measures won’t be necessary since the water naturally flows through those areas.
Wet Retention Stormwater Wetland
This practice consists of constructing a wetland to capture and temporarily store stormwater runoff before slowly discharging it into the storm sewer system. If this is implemented, these wetlands will have a raised intake that sits above ground level to force a permanent pool that will have standing water in it throughout the year. This permanent pool will support wetland plant species that will aid in nutrient uptake through their root system. The raised intake will also result in a residence time of the stormwater that will allow sediment to drop out of the water and remain in the wetland.
This practice will be considered for use in areas where there is a high concentration of runoff from urban lands. Soils will also have to be considered to ensure the wetland will hold and retain water to promote the function of a healthy wetland system.
Soil Quality Restoration
This practice consists of incorporating compost into the topsoil of the project area to infiltrate storm water. One factor of a soil’s ability to absorb rainfall is its organic content. By adding compost into the soil profile the overall organic matter content is increased allowing the soil to hold more water during rainfall events.
If used, this practice will be used in areas around town that are currently planted to turf grass. Areas to target include residential neighborhood lawns, turf grass areas around businesses, and turf grass areas around large impervious areas.
Permeable Pavers
This practice consists of installing permeable paver blocks on top of a rock aggregate base in an area that would traditionally be concrete or asphalt. The space between the bricks allows stormwater runoff to pass between the bricks and be temporarily held in the rock base below. Once the water is in the rock base it is slowly released via sub-drain tile or infiltrated into the surrounding soil profile.
If selected, this practice will be used in approved areas around town where there is currently or plans to install asphalt or concrete. The city will carefully select only sites where the practice has a low chance of silting in with sand or sediment.
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Green Roofs
This practice consists of installing vegetation and soil media on rooftops of buildings to capture runoff. Growing trays are laid out across the rooftop and filled with soil media and low growing plant species. These systems capture and hold runoff on the top of the roof, where it is either absorbed by the plants or evaporated.
If beneficial, this practice will be used in highly urbanized areas where other LID practices can’t be incorporated due to space limitations. Only buildings with the structural integrity to support such systems will be considered.
Rainwater Harvesting
This practice is the collection of rainwater from impervious surfaces and holding the water inside of storage tanks. Storage tanks, like barrels, are integrated with the system to capture the runoff for use at a later time.
This practice may be used in areas where there is enough storage in the system to adequately capture the runoff from the surface. Project locations will also have to demonstrate the ability to use the water in a timely fashion to allow the additional capture of future rainfall events.
Streambank Stabilization
This practice consists of working within stream profiles to stabilize the banks and prevent erosion. Sites that are selected for stabilization will consist of clearing existing vegetation, armoring the toe of the slope, grading back the slope, and planting permanent vegetation throughout the bank.
This practice will be limited to existing tributaries to the Middle and South River that flow through town. Tributaries that are selected for stabilization will be partnered with work within the watershed to capture and slow stormwater down before it enters the stream. Since there are many different methods for stabilization each project will be tailored to the specific location to ensure the project is successful.
Project Locations, land ownership, easements
When selecting practice locations, priority will be given to sites that are either owned by the city of within city right-of-way space along streets and roads. Since the city is viewing this project as the demonstration Sponsored Project for water quality and outreach benefits high visibility areas are preferred. The City is not anticipating any acquisition of property to install practices. If there is a practice located on property not owned by the city, maintenance agreements or easements will be filed to ensure the practice is properly maintained by the responsible party.
The Cavitt Creek watershed includes a number of potential areas to develop effective, high visibility projects in the highly impervious areas of the City and immediately downstream in the receiving stream. The unnamed tributary to the South River near South K Street is also a target area due to the development of South K Street as a “Green Street” with a concept study currently underway and in proximity of the headquarters of Indianola Municipal Utilities.
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Project location maps are included in Appendix D.
Organizations Involved in the Project
City of Indianola
The city will be the main partner and leader on the project. The city will work with all project partners and determine the final locations of practices before submitting approval to the DNR.
Iowa Department of Natural Resources
Using watershed assessment maps provided the DNR 319 staff will provide watershed assessment support and guidance on selecting final locations for practices. DNR 319 staff will work with the project partners throughout the project to ensure the maps are interpreted correctly and provide justification for practice locations according to the sub-watershed maps.
Preliminary watershed analysis provided is included in Appendix E.
Iowa Department of Agriculture and Land Stewardship
The IDALS Regional Urban Conservationist and Basin Coordinator will provide technical oversight on the project. IDALS staff will ensure the proposed practices are designed, installed, and maintained according to the appropriate guidelines.
Warren Soil and Water Conservation District
The Warren SWCD will provide general support for the project and contribute towards outreach efforts. The SWCD will consider stops along project sites as part of their Best Management Practices tour.
Warren County Natural Resources Conservation Service
The NRCS will provide general support of the project as a technical advisor if any practices that are designed according to NRCS standards are used. In future summer months, NRCS will explore the option to use office intern staff to assist with the watershed assessment portion of the project.
Simpson College
Simpson College has partnered with several projects with the City of Indianola and has embraced sustainable development and has recently implemented a demonstration project that includes conversion of turf areas to natural prairie plant material. LID practices are consistent with the values of Simpson and their practical educational mission.
Indianola Country Club
The Indianola Country Club was established in 1920 along the east branch of Cavitt Creek. It was expanded to an 18hole course in 2004. The Club has been impacted by the increase in run-off to the Cavitt Creek watershed and has accomplished erosion control and LID practices on its own. They have
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a high interest in expanding those practices and have expressed willingness to work with the City to that end.
Snyder & Associates, Inc.
Snyder & Associates will provide engineering support for the project and will work with all project partners to ensure the practices are designed and installed properly. Snyder & Associates will also provide watershed assessment data through its assessment to be completed in 2018.
Project Schedule with Timelines
Proposed Project Schedule
August 2017 Prepare SRF Sponsored Project Application January 2018 Determine BMPs that are to be implemented March 2018 Review draft versions of engineering and design plans July 2018 Open bid requests for project September 2018 Begin construction on selected practices
Major Milestones
September 2017 Submit SRF Sponsored Project Application Nov/Dec 2017 Receive notice of grant award May 2018 Final plans and specifications approved by IDNR June 2019 Complete construction of selected practices
The proposed project schedule for the water resource restoration project does fall within the same anticipated project schedule of the Morlock Lift Station Improvements project. The proposed project schedule for the Wastewater Treatment System project can be seen in Appendix F.
Evaluation Procedures and Measures
The City of Indianola will develop an evaluation procedures plan once the project is completed to ensure the practices are functioning as designed. This plan will include maintenance guidelines, training materials for staff on maintenance, and procedures for the required partners. The city will work with all projects partners to develop this plan and consult with the guidelines outlined in the Iowa Stormwater Management Manual to ensure the practices function as designed for the lifespan of the practice or loan, whichever is more applicable.
In practice locations where it is conducive, the city will explore installing water monitoring equipment in conjunction with the construction of the practice. Installing access points for water monitoring during construction phases is relatively inexpensive and would provide the city the opportunity to test pollutant levels in stormwater and the reduction rates of certain practices.
The city will measure the success of the project by how well they function according to the original goals outlined in the project. The city will pay attention to localized water quality improvements
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downstream from the practices and whether the city staff and general public have become more aware and embrace LID practices and concepts.
Explanation of the Proposed Budget
This initial implementation project will be supported by stormwater utility funds, as well as partnership contributions identified on a site by site basis. Part of the master plan effort underway will be toward evaluating the stormwater utility rates to the system needs and identified stormwater quality and quantity reduction goals.
The City’s 3-year stormwater planning process will identify projects that will be prioritized for budgeting. It is anticipated that the City’s Stormwater Utility Fund will serve as a main funding source for these projects. The SRF sponsored project grant award would be utilized to fund a project or may be used to offset additional costs.
As shown on the project location map, there are a number of implementation opportunities that will be prioritized by importance and availability and included as available budgets allow. It is anticipated that project documents will include multiple divisions and add alternate areas to account for bid variability and account for site by site project partner participation.
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APPENDIX A Authorizing Resolution Passed by the Wastewater Utility Governing Board
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Appendices
APPENDIX B Letter of Concurrence from the Wastewater Utility Bond Counsel
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V:\Projects\2017\117.0039.01\Projects\SRF Sponsored project\Application_2017-09-01_SRFSponsored.docx Ahlers & Cooney, P.C. Attorneys at Law 100 Court Avenue, Suite 600 Des Moines, Iowa 50309-2231 Phone: 515-243-7611 Fax: 515-243-2149 www.ahlerslaw.com J. Eric Boehlert 515.246.0367 [email protected]
August 30, 2017
ELECTRONICALLY – FOR INCLUSION IN APPLICATION Ryan Waller City Manager 110 N. 1st St. P.O. Box 299 Indianola, IA 50125
RE: Indianola, Iowa – Middle and South River Watersheds - Sponsored Project Application
Dear Mr. Waller:
As bond counsel to the City of Indianola, we have reviewed the City’s SRF Sponsored Project Application and supporting documentation, prepared for submission to the Iowa Finance Authority on or before September 1, 2017. The Application summarizes the City’s proposed use of Low Impact Development practices throughout the Middle and South River watersheds via Cavitt Creek and Plug Run Creek to promote overall water quality in the watersheds in which the City’s wastewater utility are located. Based upon the information contained in the Application, and the knowledge that the Iowa Finance Authority is the sole holder of outstanding sewer revenue debt of the City, we concur with the sponsored project concept as it relates to the scope of possible improvements contemplated by the City.
Very truly yours,
J. Eric Boehlert FOR THE FIRM
JEB:sk
01399693-1\13538-152
WISHARD & BAILY - 1888; GUERNSEY & BAILY - 1893; BAILY & STIPP - 1901; STIPP, PERRY, BANNISTER & STARZINGER - 1914; BANNISTER, CARPENTER, AHLERS & COONEY - 1950; AHLERS, COONEY, DORWEILER, ALLBEE, HAYNIE & SMITH - 1974; AHLERS, COONEY, DORWEILER, HAYNIE, SMITH & ALLBEE, P.C. - 1990 Appendices
APPENDIX C Letter of Support
Warren County Soil & Water Conservation District Simpson College Indianola County Club
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August 25, 2017
Department of Natural Resources State Revolving Fund Des Moines, IA
To Whom It May Concern:
We write to support the City of Indianola’s SRF Sponsored Project currently under development. We’ve had discussions with City Manager Ryan Waller about the long-term plans and the ways that Simpson College could partner with the City to help meet the goals of the project.
Our institution has been a part of the Indianola community for nearly 160 years. A significant portion of our faculty and staff live in this community. Most of our students call Indianola home for 4 years, or longer if they choose to settle here after graduation. Everyone at Simpson College is invested in this community. Thus, plans to more effectively handle storm water runoff, which already has impacted our institution’s physical infrastructure, and could affect ability to continue with our educational mission, are welcomed and supported.
As an institution of higher education, we feel we can help by exploring educational opportunities for students associated with new storm water projects undertaken by the City of Indianola. Part of our mission is the promotion of integrative learning to enable students to develop intellectual and practical skills. We aim to empower students to become citizens wholly engaged in their community. This seems like exactly the kind of project where our students could see those goals in action.
Simpson College supports this project and looks forward to partnering with the City of Indianola to explore any opportunities to get our students and faculty involved its successful implementation.
Sincerely,
Jay Keith Simmons, PhD Ryan Rehmeier, PhD Clinton Meyer, PhD President Associate Professors of Biology and Environmental Science Simpson College Simpson College
Appendices
APPENDIX D Site Exhibits
City of Indianola Cavitt Creek at Hoover Street Crossing Unnamed Tributary at West 14th Avenue
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V:\Projects\2017\117.0039.01\Projects\SRF Sponsored project\Application_2017-09-01_SRFSponsored.docx City of Indianola 2011 Aerial View
8/31/2017 KMW V:\Projects\2017\117.0039.01\Projects\SRF Sponsored project\EXH_1170039_SRF_3.dgnV:\RefLibrary\CADDStandards\WorkSpace\Standards\Printing\Print_Drivers\Color\V8iColorHalfWeightPDF.pltcfg D Y A A O R W
B N U O L S C R
E STREAMBANK EROSION Y F R F T E N J
U H O T C R O N
HILLCREST AVENUE
~ INDIANOLA COUNTRY CLUB ~
STREAMBANK EROSION FUTURE CITY PARK
STREAMBANK EROSION REGIONAL DETENTION
OUTLET EROSION
IOWA AVENUE
~ SIMPSON COLLEGE ~
WILDER ELEMENTARY SCHOOL
IRVING ELEMENTARY SCHOOL
2ND AVENUE
WHITTIER ELEMENTARY SCHOOL
OUTLET AND STREAMBANK EROSION
HEAVY STREAMBANK EROSION IN COUNTRY CLUB AREA
POSSIBLE BMP'S INSTALLED ON COUNTRY CLUB ROAD
SEVERAL AREAS OF OUTLET EROSION
POSSIBLE BMP'S INSTALLED ON SIMPSON COLLEGE CAMPUS
FUTURE DEVELOPMENT AREAS TO INCLUDE STORM WATER MANAGEMENT PRACTICES
Cavitt Creek at 0 1500 3000 Hoover Street Crossing
FEET SRF Application | City of Indianola, Iowa | 08/25/2017 8/30/2017 KMW V:\Projects\2017\117.0039.01\Projects\SRF Sponsored project\EXH_1170039_SRF_1.dgnV:\RefLibrary\CADDStandards\WorkSpace\Standards\Printing\Print_Drivers\Color\V8iColorHalfWeightPDF.pltcfg
ENUE 2ND AV WEST T E E R T T E S
E K R
T T H E S T
E U G R
O T H S S
T R U
O H S T U O S
WEST 12TH AVENUE
SOUTH K STREET PAVING PROJECT PLANNED AS "GREEN STREET" IN 2011 COMPREHENSIVE PLAN WEST 14TH AVENUE
FAILED CULVERT AND STREAMBANK EROSION
POSSIBLE IMPROVED OUTLET AND STREAMBANK STABILIZATION
FUTURE DEVELOPMENT AREA TO INCLUDE STORM WATER MANAGEMENT PRACTICES
INDIANOLA MUNICIPAL UTILITY PROPERTY FOR POSSIBLE DEMONSTRATION PROJECT
Unnamed Tributary at West 14th Avenue 0 300 600
FEET SRF Application | City of Indianola, Iowa | 08/25/2017 Appendices
APPENDIX E Preliminary Watershed Analysis
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V:\Projects\2017\117.0039.01\Projects\SRF Sponsored project\Application_2017-09-01_SRFSponsored.docx City of Indianola 1 2011 Aerial View Analysis Area, 2 2011 Aerial View Analysis Area, 3 Shaded-relief & Elevation Warren County Storm 4 Sewer Intakes & Lines Warren County Storm 5 Sewer Intakes & Lines Individual Storm 6 Sewer Intakes Sub- Catchments; Grouped into Larger Storm Sewer Network Catchments Individual Storm 7 Sewer Intakes Sub- catchments; Grouped into Larger Storm Sewer Network Catchments Storm Sewer Networks’ 8 Catchment IDs Storm Sewer Networks’ 9 Catchment IDs Storm Sewer Network Catchment #76, 10 Aerial View of Infrastructure Storm Sewer Network Catchment #76, 11 Catchments of Intakes and Sewer Network Warren County’ GIS Layers for Impervious Features, 12 Buildings, Roads, Sidewalks, Parking Lots & Driveways Warren County’ GIS Layers for Impervious Features: Buildings, Roads, Sidewalks, Parking 13 Lots & Driveways. Blue stars represent issues with the Sidewalk, Parking Lot, & Driveway representations. Rectifying the thousands of errors required utilizing a different dataset. Alternative Dataset Used to Quantify Extent of Impervious Surfaces, IDNR’s 14 High-Resolution Landcover Layer Comparing the Warren County GIS Layers to the 15 IDNR’s High-Resolution Landcover (HRLC) Layer HRLC for the Analysis Area with Catchments 16 HRLC Impervious Surfaces 17 in Relation to Catchments Percentage of Impervious Surface per 18 Individual Intake Sub-catchment (> 0.1 acres) Percentage of Impervious Surface per 19 Individual Intake Sub-catchment (> 0.1 acres) Percentage of Impervious Surface per 20 Individual Intake Sub-catchment (> 0.1 acres) Percentage of Impervious Surface per 21 Individual Intake Sub-catchment (> 0.1 acres & >70% Impervious) 22 23 24 Quantifying Annual Runoff
The following formulas were used to calculate runoff .
R = P * Pj * Rv Where: R = Annual runoff (inches) P = Annual rainfall (35 inches) Pj = Fraction of annual rainfall events that produce runoff (usually 0.9) Rv = Runoff coefficient
Rv=0.05+0.9Ia Where: Ia = Impervious percentage of each area 25 Appendices
APPENDIX F Morlock Lift Station Improvements Project Anticipated Schedule
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V:\Projects\2017\117.0039.01\Projects\SRF Sponsored project\Application_2017-09-01_SRFSponsored.docx
Morlock Lift Station Improvements Project Anticipated Schedule
Indianola, Iowa 2017
Facility Plan Approval Complete
Environmental Review Complete Complete
Final Plans & Specifications Complete Complete
Construction Permit from Iowa DNR Complete
Public Hearing Complete
Notice of Hearing & Letting Complete
Bid Letting August 31, 2017
Public Hearing, Approve Plans, Specs, Form of September 5, 2017 Contract, Estimate of Cost, Award Contract
Approve Contracts & Bonds September 5, 2017
Construction Start Date October 1, 2017
Construction Completion July 1, 2018
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