Height Modernization Planning: Lessons Learned

1
Height Modernization Planning Lessons Learned

• California Height Modernization Projects

2
Ht. Mod. Projects

• San Francisco Bay
• Demonstration Project
• San Pablo/Suisun/Grizzly Bays
• Sacramento/San Joaquin Delta
• 1997, 2002
• Yolo County
• 1999, 2002, 2005

3
Ht. Mod Projects (contd.)

• Contra Costa County
• South San Francisco Bay (CSRC contract)
• Tuolumne County (County contract w/NGS CSRC
  planning assistance)
• Glenn County
• San Joaquin Valley (CSRC contract)
• Includes two separate Caltrans projects

4
Ht. Mod Projects (contd.)

• San Simeon Earthquake re-survey (Caltrans)
• Caltrans North Region
• USBR/USACE
• San Joaquin Valley (North)
• CSRC proposed project

5
Project Participants

• Contributing Agencies Four projects
• Contractor Three projects
• Contractor w/agency participation Six projects
• Single agency Four projects

6
Project Types

• Area Type 15 Projects
• All adjacent station baselines observed
• Corridor Type 2 projects
• Common baseline in successive sessions

7
Recent Project Statistics

• 2005 Yolo County
• 144 baselines (68 stations)
• 29 re-observations, 19
• 2005 USBR/USACE
• 56 baselines (31 stations)
• 9 re-observations, 16
• Observation Sessions 45 minutes
• Re-observation sessions 60 minutes