DNR Buffer Mapping Project. LMC webinar: January 26, 2016

Transcription

1 DNR Buffer Mapping Project LMC webinar: January 26, 2016

2 Minnesota was a Buffer

3 Lost Perennial Vegetation

4 MPCA Impaired Waters

5 Where Buffers Matter Most

6 Buffer Legislation Riparian protection requirements for public waters: a 50 average / 30 minimum width, continuous buffer of perennially rooted vegetation; the state shoreland standards; or an alternative water quality practice Riparian protection requirements for public drainage systems: a 16.5-foot minimum width continuous buffer of perennially rooted vegetation on ditches within the benefited area of public drainage systems, or an alternative water quality practice

7 Phases Phase 1 this fall Public Waters Inventory and Shoreland Classifications DNR criteria for public waters buffer requirements Data for Public Waters buffer requirements Phase 3 late winter Phase 2 fall through winter Preliminary Buffer Protection Maps Data collection from Drainage Authorities DNR criteria for ditch buffer requirements Data for ditch buffer requirements

8 Phase I - Public Waters Viewing tool for awareness of public water locations Public Waters Inventory map layer as base for buffer protection map consideration Modify Public Waters Inventory alignments and locations on buffer protection maps

9 Phase I Criteria Public waters = 50 foot buffer Public water wetlands with a shoreland classification = 50 foot buffer Public drainage system ditches with a shoreland classification = 50 foot buffer Public drainage system ditches with no shoreland classification = 16.5-foot buffer Public water wetlands having no shoreland management classification will not be included

10 Phase II

11 Step 1 Phase II Use LiDAR data to identify ditches within the watersheds Use tools to identify ditch landscape features that have a definable bank and bed and convey water Create maps of ditch landscape features that may be ditches within the benefited areas

12 Step 2 Phase II Ask Drainage Authorities to share shape files of benefited areas Ask Drainage Authorities to share paper maps of benefited areas Transform paper maps into a digital map layer Ask Drainage Authorities to share land parcel information on benefited areas Transform land parcel information into a digital map layer

13 Step 3 Phase II Add benefitted area information to preliminary buffer protection maps as data is available Request Drainage Authorities to validate the delineations we show are accurate with their data records Include validated benefitted area boundaries on official map Limit ditches shown on map to benefitted area boundaries

14 Phase III Preliminary maps produced with Public Waters Inventory and ditch features using LiDAR and other data layers Local review of ditch features with criteria Local input to recommend where buffers are appropriate Update errors and corrections to create accurate maps with locally reviewed criteria

15 Example Buffer

16 Faribault County, MN Public Waters, Public Ditches, and Altered Watercourses Example Buffer Map 2 DRAFT Natural Watercourse Altered Natural Watercourse Shoreland Classification

17 Faribault County, MN Public Waters, Public Ditches, and Altered Watercourses Example Buffer Map 3 DRAFT Natural Watercourse Altered Natural Watercourse Shoreland Classification Public Ditch

18 Faribault County, MN Public Waters, Public Ditches, and Altered Watercourses Example Buffer Map 4 DRAFT Natural Watercourse Altered Natural Watercourse Shoreland Classification Public Ditch Altered Watercourse

19 Faribault County, MN Public Waters, Public Ditches, and Altered Watercourses Example Buffer Map 5 Benefitted Area DRAFT Natural Watercourse Altered Natural Watercourse Shoreland Classification Public Ditch Altered Watercourse

20 Faribault County, MN Public Waters, Public Ditches, and Altered Watercourses Example Buffer Map 6 Benefitted Area DRAFT Natural Watercourse Altered Natural Watercourse Shoreland Classification Public Ditch Altered Watercourse

21 LiDAR-derived Data Hydrographic Position Index (HPI)

22 Example Buffer Map 7 DRAFT Public Ditch Buffer 16.5 (simulated) Public Natural Watercourse Buffer 50 (simulated)

23 Challenges & Opportunities Processing data required for the maps Defining criteria for which ditches are on the map Assisting local governments with Phase III review Helping landowners and local officials be successful

24 Converting paper to digital data Processing the Data Over 100 drainage authorities Differing formats and levels of quality Review and quality control for accurate maps Funding and time constraints

25 Defining Ditch Criteria Stay with the water quality purpose of the law Allow for local control to guide map and follow-up Fair and equitable among landowners Solid criteria to minimize need for dispute resolution Defineable bed and banks, and Connected to the public drainage system, and Within benefitted area of 103E drainage system, and Altered or artificial channels

26 Assisting Local Governments Preliminary maps begin an intense local review process Criteria and guidance to manage the input is critical Tools and process support will be essential Orderly and efficient process for change requests Extremely tight timeframes to accomplish all this coordination

27 Good maps Landowners & Local Officials Local knowledge and good tools Recognizing where the work and relationships need to happen for success Designing adequate support and funding

28 Concluding Thoughts Comparison to1969 law Make a successful project Work together to overcome barriers and problems Foster strong relationships with landowners Support and assist local governments Rebuild trust with an open hand and a listening ear Preserving our quality of life

29 For a recording of this webinar, go to: Your LMC contact: Craig Johnson cjohnson@lmc.org