OREANA DAM REPLACEMENT Design Team: Brenden Jack, Jacob Smith, Mitchell Langland, and Jacob Wisshack Project Sponsors: Luke Landriani (GEOTEK) and Hattie Zobott (ARDURRA)
Faculty Advisor: Dr. Richard Neilsen Ph.D., P.E.
Dam Hydraulics
Purpose • Private clients wish to develop a pond for irrigation and waterfowl habitat • Existing dam on property is beyond its service life • Proposed dam location at the confluence of Catherine and Castle Creeks
Geotechnical Material Testing of Received Site Samples • Sieve Analysis of fine aggregate • Atterberg limit’s • Falling Head Test • Direct Shear Test
Hydrologic Information
Soil Test Results
4 ft Sample
8 ft Sample
Units
Atterberg Liquid Limit
30
N/A
%
Hydraulic Conductivity
2.864E-05
6.989E-05
cm/s
Friction Angle
37.04
44.51
degrees
Cohesion
N/A
N/A
lb/ft^2
Flow Net
• USGS Streamstats 100-year flood = 9,200 cfs • TR-55 graphical peak discharge method 100-yr flood = 194 to 2,241 cfs • Weighted area method 100-yr flood = 867 cfs • NRCS peak break discharge from upper dam = 179 cfs • Maximum probable flood = 1,046 cfs • Daily flow rate = 42.06 cfs
Dam Stability
Structural Connections Site Location
Failure Mode Sliding Overturning Piping
FOS 2.07 1.54 4.94
2023 Capstone Project