Minnesota’s Lake Superior Coastal Program

Final Report

Knife River-Larsmont Sanitary District

Submitted by: Vicki Ojard – District Clerk

December 7, 2007

Project No.306-09-07

Contract No. A78905

This project was funded in part under the Coastal Zone Management Act, by NOAA’s Office of Ocean and Coastal Resource Management, in cooperation with Minnesota’s Lake Superior Coastal Program.

INTRODUCTION

The Knife River-Larsmont Sanitary District (KRLSD) is experiencing a extreme amount of residential development and desired to promote responsible and environmentally sound growth within the district. To accomplish this goal the District need current parcel mapping to help define current parcel density. The District resides along the shore of Lake Superior just north of the city of Duluth and south of the city of Two Harbors. The region is a semi-rural area and has very shallow soils, with land cover being mostly northern boreal type forest combined with lake frontage beach typical of the “Iron Range”.

WORK COMPLETED

A data collection process was procured in cooperation with Lake County. The County was contacted to acquire records, database information and any GIS information relevant to the project. Additional information was acquired from the Minnesota Department of Natural Resources to provide additional information details, especially for environmental information. Other data specific to the district was procured, most of which included outdated hard copy maps of the district sanitary sewer system and plans.

The base map was completed with data provided by Lake County from their initial GIS efforts. Information provided was the parcel polygons and the County’s parcel database. The District base map was in need of additional information as it was missing detail needed to provide a rich base map for the District utility needs. Road right of ways were created and fitted to the parcels. Other base layers were collected from the DNR and then spatially improved to fit the parcel data. The parcel database was then digitally “linked” to the parcel polygons providing access to ownership information. Because parcel data was available the project was enhanced to include sanitary sewer and storm sewer layer development within the confines of the existing agreement.

The GPS survey of utility information and other base map points was completed using a Trimble GeoXT series GPS unit. Sanitary sewer and storm sewer information was collected. Manholes, lift stations, grinder pumps, storm system inlets and outlets were located using the GPS system. GPS data was “post-processed” to remove redundant and atmospheric interference. This process uses field collected base station information from the area as “holding positions” to adjust the field data and improve overall accuracy.

Once field collection, base map prep, and parcel data collection were completed the GIS was assembled. Base layers were assembled and the parcel data overlaid on this base. The sanitary district data was created using existing documentation and then field checked by engineering staff for completeness and locations. Once field checks were finished the final data was plotted into map books for District use.

The last step was the development of a web based GIS system for use by the District staff and consultants to help track system information and parcel ownership changes. The GIS intended to be used to track and monitor future development and building in the District. It allows access to parcel data, ownership information, sanitary sewer information and storm sewer information.

GOVERNMENT COORDINATION AND DECISION MAKING

Educational activities included staff training for the district clerk on the use of the GIS and how to extract information for parcels and sewer data for future expansion to provide services to development. The applications will allow staff to generate quick maps, lists and notifications for meetings on District issues. The system will also be used to track system maintenance issues and needs as well as provide conditional reporting. Additional training on GPS for 2 staff to assist with system maintenance was also completed to allow the use of this technology to track incremental changes.

RESULTS

Map sets for parcels and utilities have been generated for the District. Map books for of the District sewer facilities were generated for staff use in vehicles. This will help with future maintenance efforts. A parcel map set were also plotted in large format for office use.

MSA developed a web based GIS system to help implement GIS use efficiently. This GIS is built on ESRI’s ArcIMS web GIS technology and is easily expandable. The viewer has separate controls to allow users to directly interact with the map. Classic functions include zooming and pan tools, as well as an identify and selection icons that will interact with database components of the active layer. Other functions include parcel buffering (selection within a distance) and mailing label generation tools, Adobe PDF “map maker”, measuring and printing tools.

Database layer controls are displayed on the left frame of the application that allows users change layer display and turn layers on or off. Scale sensitivity is built into the application to prevent users from turning layers on that cannot be visualized at given zoom extents. The layers list will also Toggle off/on various databases that for various features. This will allow the City the opportunity build and expand future GIS layers and databases.

As each layer is activated or highlighted, the system database is then selected. Once selected feature attributes are displayed as features on selected on the screen or queried from the database. At the present time the database attributes are minimal for some layers due to the lack of information available. As time permits the City will begin development of additional information on the different layers.

Web GIS Overview 1

CONCLUSIONS

The development of the parcel data, District mapping with the sewer layers and associated databases will help the District with future maintenance and replacement schedules as needed. The parcel data will help them with system planning as development continues to spread into the region from neighboring Duluth. Additional value is that the District can quickly access map information either digitally or via GIS generated mapping and not rely on staff knowledge of systems. This is especially important to communities as the “baby-boomer” generation begins retiring and taking all their community knowledge with them. This is vitally important to sewer system operation in the coastal regions in order to avert system breakdowns and preserve water quality in the area. Tapping into that staff knowledge to build a more robust database system is very important and GIS begins this process. Future City projects include maintenance of systems and data using GPS technology internally along with other specialty tool development for the web GIS system.

APPENDICES

To see the Knife River-Larsmont GIS system, go to http://gis.msa-ps.com/MAPS/MN/Cities/knife%5Friver/mapviewer