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HomeMy WebLinkAboutPackets - Stormwater Utillity Commission (184)       AGENDA STORMWATER UTILITY COMMISSION REGULAR SESSION MARCH 16, 2023 HOPI CONFERENCE ROOM 11000 N. LA CAÑADA DRIVE        REGULAR SESSION AT OR AFTER 4:00 PM   CALL TO ORDER   ROLL CALL   CALL TO AUDIENCE - at this time, any member of the public is allowed to address the Commission on any issue not listed on today’s agenda. Pursuant to the Arizona open meeting law, individual Commission members may ask Town staff to review the matter, ask that the matter be placed on a future agenda, or respond to criticism made by speakers. However, the Commission may not discuss or take legal action on matters raised during "Call to Audience." In order to speak during "Call to Audience", please specify what you wish to discuss when completing the blue speaker card.   COUNCIL LIAISON COMMENTS (INFORMATIONAL ONLY)   DIRECTORS REPORT (INFORMATIONAL ONLY)   REGULAR SESSION AGENDA   1.REVIEW AND APPROVAL OF THE FEBRUARY 16, 2023 MEETING MINUTES   2.DISCUSSION OF MEETINGS AND EVENTS   3.PRESENTATION AND DISCUSSION OF THE PIMA COUNTY FLOOD PRONE LAND ACQUISITION PROGRAM BY JOSEPH CUFFARI, PIMA COUNTY REGIONAL FLOOD CONTROL DISTRICT   4.PRESENTATION AND DISCUSSION OF STORMWATER UTILITY DEVELOPMENT REVIEW   FUTURE AGENDA ITEMS   ADJOURNMENT   POSTED: 3/14/23 at 5:00 p.m. by dt When possible, a packet of agenda materials as listed above is available for public inspection at least 24 hours prior to the Commission meeting in the Town Clerk's Office between the hours of 8:00 a.m. – 5:00 p.m. The Town of Oro Valley complies with the Americans with Disabilities Act (ADA). If any person with a disability needs any type of accommodation, please notify the Town Clerk’s Office at least five days prior to the Commission meeting at 229-4700. INSTRUCTIONS TO SPEAKERS Members of the public have the right to speak during any posted public hearing. However, those items not listed as a public hearing are for consideration and action by the Commission during the course of their business meeting. Members of the public may be allowed to speak on these topics at the discretion of the Chair. If you wish to address the Commission on any item(s) on this agenda, please complete a blue speaker card located on the Agenda table at the back of the room and give it to the Recording Secretary. Please indicate on the speaker card which item number and topic you wish to speak on, or if you wish to speak during “Call to Audience,” please specify what you wish to discuss when completing the blue speaker card. Please step forward to the podium when the Chair announces the item(s) on the agenda which you are interested in addressing. 1. For the record, please state your name and whether or not you are a Town resident. 2. Speak only on the issue currently being discussed by the Commission. Please organize your speech, you will only be allowed to address the Commission once regarding the topic being discussed. 3. Please limit your comments to 3 minutes. 4. During “Call to Audience”, you may address the Commission on any issue you wish. 5. Any member of the public speaking must speak in a courteous and respectful manner to those present. Thank you for your cooperation. “Notice of Possible Quorum of the Oro Valley Town Council, Boards, Commissions and Committees: In accordance with Chapter 3, Title 38, Arizona Revised Statutes and Section 2-4-4 of the Oro Valley Town Code, a majority of the Town Council, Board of Adjustment, Historic Preservation Commission, Parks and Recreation Advisory Board, Stormwater Utility Commission, and Water Utility Commission may attend the above referenced meeting as a member of the audience only.”    Stormwater Utility Commission 1. Meeting Date:03/16/2023   Submitted By:Yarina Hynd, Public Works SUBJECT: REVIEW AND APPROVAL OF THE FEBRUARY 16, 2023 MEETING MINUTES RECOMMENDATION: Staff recommends approval. EXECUTIVE SUMMARY: N/A BACKGROUND OR DETAILED INFORMATION: N/A FISCAL IMPACT: N/A SUGGESTED MOTION: I MOVE to approve (approve with changes), the February 16, 2023 meeting minutes. Attachments 02-16-23 Draft Minutes  D R A F T MINUTES STORMWATER UTILITY COMMISSION REGULAR SESSION FEBRUARY 16, 2023 HOPI CONFERENCE ROOM 11000 N. LA CAÑADA DRIVE            REGULAR SESSION AT OR AFTER 4:00 PM   CALL TO ORDER Chair Crocker called the meeting to order at 4:00 P.M.   ROLL CALL Present: Richard Hawkinson, Commissioner Gary Mattson, Commissioner Richard Crocker, Chair Absent: William Thomas, Commissioner David Parker, Vice Chair Staff Present:Aimee Ramsey, Assistant Director Public Works John Spiker, Stormwater Division Manager Scott Bennett, Stormwater Utility Analyst Attendees: Harry Greene, Town Council Liaison  Commissioners Parker and Thomas asked to be excused.   CALL TO AUDIENCE There were no speakers at this time.   COUNCIL LIAISON COMMENTS (INFORMATIONAL ONLY) Councilmember Greene commented on his appreciation for how helpful Stormwater Division Manager John Spiker was with providing information to him that was needed for council planning.   DIRECTORS REPORT (INFORMATIONAL ONLY) Mr. Spiker commented on the following: Hazardous material spill on I-10. Due to high winds, surrounding areas were advised to use caution. Air and soil monitoring are being done. Mr. Spiker advised that there were lessons to be learned from this event. Train derailment in East Palestine, Ohio and burning off of chemicals. Mr. Spiker is interested in seeing how accountability for this event unfolds. Councilmember Greeene asked if our ground water is being monitored after the I-10 spill. Mr. Spiker 2/16/23 Minutes, Stormwater Utility Commission Regular Session 1 Councilmember Greeene asked if our ground water is being monitored after the I-10 spill. Mr. Spiker responded that our water is monitored by the Arizona Department of Water Resources (ADWR) and Arizona Department of Environmental Quality (ADEQ), with the ability to take samples at monitoring wells. The Mayor and Town Managers office have been contacted by Senator Kelly's office regarding providing federal assistance for federal needs that the town might have. The Stormwater Utility has three hazard mitigation grant applications into the Federal Emergency Management Agency (FEMA) and two FEMA Floodplain mapping projects.This information was forwarded to the Mayor's office to see if they could give us a status and to see if there is supplemental information that we need to provide.   REGULAR SESSION AGENDA   1.REVIEW AND APPROVAL OF THE JANUARY 19, 2023 MEETING MINUTES       Motion by Commissioner Richard Hawkinson, seconded by Commissioner Gary Mattson to approve the meeting minutes as written.  Vote: 3 - 0 Carried   2.DISCUSSION OF MEETINGS AND EVENTS       Mr. Spiker reported on recent meetings and events.    Mr. Spiker commented on the demonstration of a watershed table at the outreach event attended by the Stormwater Utility. GIS Analyst Scott Bennett stated that the attendance was well over 100 students.    Mr. Spiker commented on a discussion regarding the Floodplain Acquisition Program (FLAP) that was held at the Pima County Flood Control District Meeting.   3.PRESENTATION AND DISCUSSION OF THE STORMWATER UTILITY'S CARTEGRAPH ASSET MANAGEMENT PROCESS       Stormwater Utility staff gave a presentation demonstrating the current asset management and inspection program used in the Cartegraph Operations Software (OMS).   4.PRESENTATION AND DISCUSSION OF POTENTIAL STORMWATER UTILITY FUTURE BUDGET SCENARIOS       Mr. Spiker presented four additional Stormwater Utility future budget scenarios. Updated construction costs were provided for current fiscal year proposed projects as well as additional revenue from the American Rescue Plan Act (ARPA) that has been designated for stormwater improvements. Discussion ensued among the Commissioners and Staff. After a review of the budget with questions and answers, Assistant Director of Public Works Aimee Ramsey stated her thoughts were that if an increase is asked for, the Stormwater Utility needs to identify what it is for and if an increase is necessary. Ms. Ramsey stated that she does not think a fee increase is necessary at this time, and that the Stormwater Utility is in excellent shape. Stormwater Utility has a high success rate in grants and securing funding. Mr. Spiker stated that at a future meeting we would need a recommendation from the Commission, either yes or no, for a fee increase. A summary report will be drafted once a recommendation is made.   FUTURE AGENDA ITEMS 2/16/23 Minutes, Stormwater Utility Commission Regular Session 2 FUTURE AGENDA ITEMS Stormwater Budget Flood Insurance Floodplain Acquisition Program (FLAP)   ADJOURNMENT    Motion by Commissioner Gary Mattson, seconded by Commissioner Richard Hawkinson to adjourn the meeting.  Vote: 3 - 0 Carried    Chair Crocker adjourned the meeting at 5:30 P.M.     I hereby certify that the foregoing minutes are a true and correct copy of the minutes of the regular session of the Town of Oro Valley Stormwater Utility Commission of Oro Valley, Arizona held on the 16th day of February 2023. I further certify that the meeting was duly called and held and that a quorum was present. ___________________________ Yarina Hynd Senior Office Specialist 2/16/23 Minutes, Stormwater Utility Commission Regular Session 3    Stormwater Utility Commission 2. Meeting Date:03/16/2023   Requested by: John Spiker, Public Works Submitted By:Yarina Hynd, Public Works SUBJECT: DISCUSSION OF MEETINGS AND EVENTS RECOMMENDATION: N/A EXECUTIVE SUMMARY: The following is a list of immediate past, and future, stormwater meetings and events. February 16, 2023 - Oro Valley Stormwater Utility Commission Regular Session Meeting February 28, 2023 - Pima Association of Governments Southern Arizona Low Impact Development and Arizona State University Sustainable Cities Network Green Infrastructure Workgroups Partnering Meeting March 15, 2023 - Pima County Regional Flood Control District Advisory Committee Meeting  March 16, 2023 - Oro Valley Stormwater Utility Commission Regular Session Meeting April 6, 2023 - Santa Cruz Watershed Collaborative Spring Forum April 8, 2023 - Celebrate Oro Valley  BACKGROUND OR DETAILED INFORMATION: For informational purposes only. FISCAL IMPACT: N/A SUGGESTED MOTION: N/A    Stormwater Utility Commission 3. Meeting Date:03/16/2023   Requested by: John Spiker, Public Works Submitted By:Yarina Hynd, Public Works SUBJECT: PRESENTATION AND DISCUSSION OF THE PIMA COUNTY FLOOD PRONE LAND ACQUISITION PROGRAM BY JOSEPH CUFFARI, PIMA COUNTY REGIONAL FLOOD CONTROL DISTRICT RECOMMENDATION: N/A EXECUTIVE SUMMARY: The Pima County Flood Prone Land Acquisition Program (FLAP) is an award-winning voluntary program that began in 1983 after the historic 1983 flood. The FLAP enables the Pima County Regional Flood Control District (RFCD) to purchase flood and erosion-prone property and relocate residents to safer locations. This program allows the RFCD to protect public safety by removing at-risk development out of hazardous floodplains and removing structures that are obstructions to flow. For FLAP properties, multi-purpose land management plans are developed to return riverine functions and preserve and restore riparian habitat, so the land becomes a valued asset for the community. Under this program, interested property owners typically contact the RFCD. The RFCD then reviews the severity of flood hazards on the property, the property location in relation to other public lands, available funding, and other factors to determine whether to pursue acquisition.   The program is a key tool in the RFCD’s efforts in protecting public safety, minimizing future flood losses, and preserving riparian and floodplain functions. FLAP includes the purchase of flood and erosion-prone property to enhance public safety as well as riparian ecosystems, thereby restoring and preserving the natural floodplain characteristics of our watercourses. Preservation of floodwater storage in floodplains minimizes future flood damages, reduces the need for structural flood and erosion protection, facilitates groundwater recharge and improves surface water quality. Public acquisition of natural floodplains and high valued riparian property also creates passive-use recreational opportunities, maintains open space corridors, enhances riparian habitat, and promotes wildlife migration and biological diversity. This program compliments the goals of the Sonoran Desert Conservation Plan.    BACKGROUND OR DETAILED INFORMATION: N/A FISCAL IMPACT: N/A SUGGESTED MOTION: N/A Attachments Pima County FLAP presentation  AN OVERVIEW OF THE FLOODPRONE LAND ACQUISITION PROGRAM (FLAP) IN PIMA COUNTY Joseph Cuffari, CFM Hydrologist Program Manager OCTOBER 1983 FLOOD EVENT •FLAP was created in 1984 in response to the 1983 flood event. •Flooding occurred after 6-7 inches of rain fell across the Tucson Basin over a 5-day period. •Flooding impacted development along the Rillito and Santa Cruz Rivers, damaging both commercial and residential properties with damage to public infrastructure estimated at $64 million dollars. •Initially focused on acquiring properties damaged in the 1983 flood •Was expanded to include any floodprone properties throughout Pima County •Removes existing development or prevents new development in floodprone areas •The land is restored to natural floodplain conditions •Voluntary program: “Willing buyer, willing seller”. No eminent domain. •Interested property owners can submit an application for review and approval. Applications are then approved based on severity of the flood hazard, location in relation to other public lands, and available Program funding THE INTENT OF FLAP •General Obligation Bonds (2004 primarily) •Flood Control budget •Roughly $1M allocated each year •Can pull from other allocated funding sources •Pima County General Fund (as needed) •Grants and award allocations •Miscellaneous •Adjacent project elements (ROW, easements, utilities) •Donations (golf courses, death/quit claims) FUNDING SOURCES THE BENEFITS OF FLAP •Eliminates the need for structural flood control improvements such as bank protection and levees, •Preserves and enhances natural floodplain function, •Protects open space for wildlife, including corridors that allow for wildlife movement, •Preserves native vegetation, which in turn enhances groundwater quality by slowing and infiltrating flood waters, and •Creates passive recreational opportunities such as hiking and birding. THE BENEFITS OF FLAP FEMA Special Flood Hazard Area Zone AO2/AO3 Removing structures/people from the hazard THE BENEFITS OF FLAP George Mehl Park & Chuck Huckelberry LoopErosion hazard issues and threats THE ASPEN FIRE (2003) Catalina Regional Park (future)Erosion and floodplain hazards FINGER ROCK WASH •Finger Rock Wash at Havasu Road •8 repeated flooded homes in 2021 and 2022 •Classified as Repetitive Loss Properties •Currently (3/8/23): •Obtained 3 properties (2 SFRs and 1 assisted living facility) •Cost = $2,621,000 •Made an offer on a 4th property •Demolish the structures down to the slab, break up the bottom of pools and fill in, move boulders for protection to mitigate flow velocities and downstream impacts. WHERE WE ARE NOW Acquired properties in red, Floodplains in blue. Over 14,000 acres acquired How are all these lands managed? LAND STEWARDSHIP PROGRAM Program created in 2015 to manage the growing number of open space, FLAP, and restored natural resource lands. •Cienega Creek •Swan Wetlands •Kino Environmental Restoration Project •Big Wash Ecosystem Restoration site •77-acre site located in the Big Wash floodplain, immediately upstream of the confluence with Cañada del Oro Wash, west of the Oro Valley Marketplace •The Project was constructed in 2009 on land owned by the District as part of a Restoration Agreement between Pima County and Vistoso Partners LLC (Vestar) •The Agreement required Vestar to restore a retired agricultural field and degraded buffer areas to be a diverse self-sustaining Xeroriparian habitat based on nearby reference sites •Restoration activities included re-contouring the land to create microtopography similar to adjacent natural areas, planting of over 10,000 native container and salvage plants and hydroseeding with a native seed mix BIG WASH RESTORATION •The agreement also required construction of a linear park (Loop) connecting to the Tangerine Road shared use bike path, creating a recreational opportunity for a variety of trail users. •The Project’s maintenance road has been designated a natural trail by the Town of Oro Valley, providing wildlife viewing opportunities to hikers and birders, with access provided in the main channel of the Big Wash for equestrian users. BIG WASH RESTORATION 2007 →2009 BIG WASH RESTORATION 2008 →2020 •FLAP has become an important floodplain management tool, minimizing flood damages and risk to the public by removing floodprone land from development. •The Land Stewardship Program provides a framework for managing the growing acreage of land acquired through FLAP. •The District is looking for opportunities to collaborate on land stewardship projects, trash cleanups, or anything else that would be beneficial to public lands. 3 KEY TAKEAWAYS QUESTIONS? Joseph Cuffari, CFM Hydrologist Joseph.Cuffari@pima.gov    Stormwater Utility Commission 4. Meeting Date:03/16/2023   Requested by: John Spiker, Public Works Submitted By:Yarina Hynd, Public Works SUBJECT: PRESENTATION AND DISCUSSION OF STORMWATER UTILITY DEVELOPMENT REVIEW  RECOMMENDATION: N/A EXECUTIVE SUMMARY: The Stormwater Utility is tasked with upholding water quality and quantity regulations imparted by the Federal and State governments for all proposed developments within the Town. The Environmental Protection Agency's Clean Water act governs the water quality standards and the Federal Emergency Management Agency's National Flood Insurance Program governs water quantity, also known as floodplain management.  The Stormwater Utility, in partnership with our colleagues at the Community and Economic Development Department, have developed a process to ensure the Federal, State and Local regulations are achieved. Below is the general process for a typical development project to reach Town approval and become ready for construction activities to begin.   The online application process starts at the Town of Oro Valley’s Community and Economic Development website ( https://www.orovalleyaz.gov/Government/Departments/Community-and-Economic-Development). The applicant submits the preliminary concept and plans into the permit database, SmartGov, for staff feedback. A Town of Oro Valley Permit Technician reviews the application for completeness. A pre-application meeting is held with applicable departments and agencies to discuss the proposal. A pre-submittal neighborhood meeting is scheduled to introduce the proposal to residents to gather feedback of the site and landscape design. Formal submittal of plans in accordance with all applicable Code requirements. Town of Oro Valley staff distributes copies to all internal and external agencies to review for code compliance. Town of Oro Valley staff review for Code Compliance. Additional review may be required prior to scheduling the application for Planning and Zoning Commission consideration if the proposal is not code complaint.   Applicant to address Town of Oro Valley staff review comments relative to code compliance. Additional revised submittals may be necessary if code issues are not adequately addressed. Town of Oro Valley staff will review revised submittals for code compliance. Additional review may be required prior to scheduling the application for Planning and Zoning Commission consideration if the proposal is not code complaint.  Planning and Zoning Commission review focused on conformity with adopted plans, code requirements and the Planning and Zoning Commission’s recommendation. The deciding body on preliminary plat and development plan applications Upon Town Council approval, submittal of plans for permitting and the Final Plat. BACKGROUND OR DETAILED INFORMATION: N/A FISCAL IMPACT: N/A SUGGESTED MOTION: N/A Attachments Stormwater Development Review  Town of Oro Valley Development Drainage Review Process March 16, 2023 Purpose Drainage review serves as a permanent record of the basis of design for drainage conveyance and flood-control infrastructure as well as stormwater pollution prevention. Drainage reports and drainage related improvement plans, document the Town review of floodplain permit applications and the Town findings that proposed improvements meet the minimum floodplain-management and water quality requirements mandated by Federal, State and Local entities. Purpose The Stormwater Utility is interested in understanding two key elements in regard to development: 1)Activities within the regulatory floodplain 2)Adverse impacts due to poor drainage conditions, lack of runoff control or improper design Drainage Review Process Overview Development review is required for all new residential and nonresidential projects in Town, except for individual detached single-family custom homes or as otherwise specified in the Zoning Code Pre-Application •Opportunity for applicant to ask about property constraints Neighborhood Meeting •Opportunity for applicant to present conceptual site plan to nearby neighbors Formal Application •Development Plans and reports, including Drainage Report, for Town staff review Planning and Zoning Commission Meeting Town Council Meeting Final Development Plan Submittal Pre-Application The Town uses SmartGov Software to communicate with our customers. All project applicants are required to register through SmartGov portal. Pre-Application The Stormwater Utility uses pre- application meetings to review existing floodplain information and environmentally sensitive properties Pre-Application The first step is to identify general drainage and special conditions on a given customers property Existing Floodplains (FEMA, Local, Special Study) Section 404 Federally Regulated Areas Conservation Easements or Environmentally Sensitive Lands Pima County Regional Flood Control District Properties Pre-Application Base information collected for proposed development Development Review Once the conceptual design has been submitted, the Stormwater Utility is looking for applicants to identify the existing drainage patterns. This should be a descriptive “roadmap” of where runoff from specific onsite areas originates, where it is collected and moved through conveyances, and ultimately where it is released. The Town is attempting to identify regulatory floodplains which are associated with the 1% storm (100-year storm event) discharge equal to or greater than 100 cubic feet per second as well as any adverse drainage conditions that may impact development. Floodplain Use Permits will be required for any activity within the regulatory floodplain. Development Review Required permit workflow identified based upon Development Plan Development Review Floodplain Use Permit Workflow Development Review -Existing Drainage Conditions Hydrologic and Hydraulic Models are used to validate the findings The outcome of a hydrologic model is to produce a calculated flood peak which is then used in the hydraulic modeling effort. The Town requires the use of the Oro Valley Category 1 Flood Hydrology Procedure for smaller, uncontrolled watersheds; or the use of the Category 2 Flood Hydrology Procedure for larger, more-complex watersheds. Hydraulic models are used to estimate water flow, water level and water velocity through a conveyance system. A multitude of models are acceptable to the Town from the basic uniform flow Manning’s Equation up to complex 2-dimensional overland flood routing models. Development Review -Existing Drainage Conditions Watershed Delineation Hydrograph Development Review -Existing Drainage Conditions Information on the specifics for hydrologic and hydraulic modeling can be found in the latest edition of the Oro Valley Drainage Criteria Manual Development Review -Proposed Drainage Conditions Once the existing conditions are known, the next step is to demonstrate the Proposed Conditions for the development and where the “new” drainage routes the water around the property. The Town is looking for drainage moving away form the proposed structures and any proposed impacts to regulatory floodplains. In addition, the Town is validating that structures are designed above or outside the regulatory floodplain, drainage facilities carry the proper amount of flow and sediment, and that erosion control is addressed. Development Review -Proposed Drainage Conditions Existing Conditions Floodplain Proposed Conditions Floodplain Development Review -Proposed Drainage Conditions Proposed Drainage Improvements Development Review -Inspection Once the Final Development Plans have been accepted, inspection workflows are established. Development Review -Inspection Inspection Report Questions?