20250423
16174700
1.0
FALSE
CulvertChecks_WM
002
-13692296.918500
-13626482.931600
4914585.834000
4960717.343700
1
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.3.0'><WKT>PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]</WKT><XOrigin>-20037700</XOrigin><YOrigin>-30241100</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102100</WKID><LatestWKID>3857</LatestWKID></ProjectedCoordinateSystem>
150000000
5000
20250423
16172000
20250423
16172000
20250423
These are possible culverts near or across roads in Shasta County. Generated from lidar based DEMs, downloaded from the 3DEP program and processed on local workstations based on techniques demonstrated at CDWR presentations 2025. These are only possible culvert locations, intended to guide culvert confirmation using a mobile app in the field.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Lines created by the ArcHydro tools to Identify Breach Areas and Create Breach Lines. The Breach lines are then selected where they are near a county road, and the county roads are joined to the lines to attribute them with a road name they may cross. The breach lines are then renamed to CulvertChecks and added to the enterprise geodatabase that is used for all web and mobile app data storage. The source data are the 1 meter DEMs downloaded from the USGS Lidar explorer (https://apps.nationalmap.gov/lidar-explorer/) April 2025</SPAN></P></DIV></DIV></DIV>
USGS 3DEP for source DEMs
Contact Shasta County IT/GIS for processing metadata
CulvertChecks
Culverts
Shasta County
Esri ArcGIS 13.3.4.52636
1
-122.999996
-122.408779
40.649075
40.333919
File Geodatabase Feature Class
dataset
EPSG
6.18.3(9.3.1.2)
3035
Simple
FALSE
3035
TRUE
FALSE
CulvertChecks_WM
Feature Class
3035
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
SHAPE
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
GISNUM
GISNUM
Integer
4
0
0
FullStreet
FullStreet
String
80
0
0
NEAR_FID
NEAR_FID
Integer
4
0
0
NEAR_DIST
NEAR_DIST
Double
8
0
0
IsCulvert
IsCulvert
SmallInteger
2
0
0
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.