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Culvert Data, Location and Condition are Important to Towns
and County Government
By Scott M. GaletkaLand Information Officer/GIS Project
CoordinatorLincoln County Land Information and Conservation Department
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Reasons for the Inventory
• To obtain culvert location on all county and eventually all town roads
• For Watershed delineation for Land Conservation Projects
• To acquire culvert condition and location data for a replacement plan
• To plan accurate budgets
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Inventory Participants
• County Highway Department GPSed the culvert locations on county roads when doing their yearly bridge inventory
• Towns GPSed the culvert locations• GIS staff facilitated the project
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Inventory Process
1. Determine data to be collected
1. Location2. Condition
• Good• Fair• Poor
3. Height4. Length5. Road
6. Type• Concrete• Galvanized• Aluminum• Plastic
7. Shape• Arched• Round• Box
8. Date9. Revisit Date10. Collector
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Inventory Process
2. Set up the code in the GPS a. Collect most of the data in the fieldb. Create the code in the GPS with drop down menus
3. Training on GPS4. Data download5. Data Review
• Quick Prints
6. Merge data
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Inventory Process
7. Create unique identifier8. Map creation9. Inventory products, hard and digital copy of the
data in an Excel spreadsheet format10. Inventory maintenance, the entity can update
their records of each replaced culvert in hard or digital format
a. Re-link the culvert data to the shapefiles
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When is the best time to do the Inventory?
• Early Spring, just after the snow melts• Before the vegetation starts to grow• Before the mosquitoes hatch
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How long does it take for the field work?
• The Town of Corning took about 7 days for 260 culverts in the late spring early summer
• The Town of Scott took about 4 days for 211 culverts in the winter with minimal snow/ice cover
• The County roads took 11 days for 845 culverts in the winter with minimal snow/ice cover
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How long does it take for the office work?
• Downloading data takes about 10 minutes per download
• Merging data takes about 5 minutes• Exporting data takes about 5 minutes• Creating hard copy maps takes about 2-3 days
per entity• Training on GPS takes about 5-10 minutes
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Inventory Outcomes
• To check the 24K Hydro Layer• By the Conservation Department staff for
watershed delineations• To maintain detailed records of culvert locations
and tracking system• For the development of a County and Town
Culvert Replacement Plan
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Inventory Outcomes
• The government entity is responsible for its own updates
• Utilized by Sheriffs Department for crash site mapping measurements
• More GPS-trained people able to collect data in the field
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Questions?
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