Montana Height Modernization Curt Smith National Geodetic Survey Idaho Phone: 208-332-7197 Montana Phone: 406-444-0989 [email protected] tate of Vertical Contro
Montana Height Modernization Curt Smith National Geodetic Survey Idaho Phone: 208-332-7197 Montana Phone: 406-444-0989 [email protected] State of Vertical.
Dec 17, 2015
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MontanaHeight
ModernizationCurt SmithNational Geodetic SurveyIdaho Phone: 208-332-7197Montana Phone: [email protected]
State of Vertical Control
Heights Matter!
DESCRIPTION: The Santa Clara River flows past destroyed homes and a fallen tree in the Creek side subdivision Wednesday in St. George. Seven homes in the subdivision were completely lost to the river and at least another four were severely damaged by this week's flooding. CREDITS: Jud Burkett COPYRIGHT: The Spectrum
Southern Utah Flooding 1/12/2005
DESCRIPTION: A row of damaged homes in Riverwood subdivision cling to the banks of the Santa Clara River Thursday in St. George.
CREDITS: Jud Burkett COPYRIGHT: The Spectrum
Southern Utah Flooding 1/12/2005
North Carolina Floodplain Mapping
2002 Detail Mapping vs.
Effective Approximate
Mapping
Poured in place concrete post
1954
Stainless steel rod driven to refusal
1980’s
PhysicallyMonumented
Points
Current Survey Control
NGS Data Sheetwww.ngs.noaa.gov
NGS Bench Marks
Disturbed Geodetic ControlCoordinates/Elevations
Questionable
Destroyed Geodetic ControlNo Coordinates/Elevation
Monumented PointsDeterioration
USGS Topographic Map
F 143 Not recovered (destroyed)
E 143 Not recovered (destroyed)
D 143 Not recovered (destroyed)
C 143 Not recovered (destroyed)
2nd Order Vertical1st Order Vertical
684 - Total Vertical Control Points Listed
Lewis and Clark County Vertical Control Pointsin NGS Database
Lewis and Clark County Vertical Control Points in NGS Database
684 - Total Vertical Control Points Listed
176 (25.7%) – Missing 65 - Reported as Destroyed111 - Reported as Not Found
508 (74.3%) – Possible Vertical Control Points146 – Total Monumented (no recovery notes)
20 – Reset 1 – Set Within Last 10 Years
362 (52.9%) – Total Recovered in Good Condition112 – Recovered for NAVD88 (after 70’s) 64 – Recovered Good Within Last 10 Years
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