LOWER MONUMENTAL DAM FISH LADDER TEMPERATURE CONTROL SYSTEM Project Team: Lauren Moore, Theodore Ertel, Madelynn Gregoire, Jayr Ayala Project Sponsors: Jarrod Milligan, S.E., Ryan Laughery, P.E. BACKGROUND Anadromous fish are deterred from exiting the Lower Monumental Dam Northern Fish Ladder on the Snake River due to high temperatures and low dissolved oxygen levels.
SITE LOCATION Kahlotus, Washington
PIPE NETWORK 115’ long 3” galvanized pipe, ASTM A53 Schedule 40 Air flow of 22 cfm Minimum pressure of 60 psi 7.5 HP Quincy Compressor with 60 gallon receiving tank Klutch Air Compressor Regulator Routing Clamps
HOUSEKEEPING PAD
COMPRESSOR
CHIMNEY 73 FT TALL 3 FT X 3 FT
HOOD 6 FT TALL 18 FT X 18 FT
FISH LADDER EXIT
DAM 110 FT TALL
Fluid Debris*
DESCRIPTION Self-Weight Per ASCE 7-16 Chapter 13 1 ft/s Drag Force 5 ft Pressure Differential Per USACE
TYPE Gravitational Gravitational/Lateral Lateral
ITEM
ESTIMATED COST
Steel Chimney
$1,900,000.00
Compressor
$20,000.00
Pipe System
$30,000.00
Labor and Equipment
$450,000.00
Estimated Total:
$2.4 Million
FISH BEHAVIOR
Fish prefer temperatures around 68°F; our system circulates cooler water from lower depths. Bubbles deter fish; our structure minimizes the interactions between the fish and the bubbles. Our design also creates a current that entices fish to exit the fish ladder
AIR DIFFUSER
STRUCTURAL DESIGN CRITERIA LOAD Dead Seismic
COST ANALYSIS
STEEL DESIGN
Designed per AISC Steel Construction Manual ½” A36 plates walls with 6” ribs and stiffeners to increase rigidity. Protective coatings to resist corrosion Galvanized HSS gravitational and lateral braces 5/16” Fillet welds A325 N-Bolts
Lateral
AIR DIFFUSER
*Special load case that only occurs at the top 8 ft of the structure
Coarse bubble diffuser Circulates 37.5 cfs of water 11.5’ long 1.5” galvanized pipe diffuser 12’ long 3” diameter feeding pipe (20) 0.2” drilled holes per ft of pipe
3,000 psi existing concrete dam LRFD load combinations Seismic risk category 1, soil class B, and site class B System defined as rigid component with limited deformability elements and attachments per ASCE 7-16 Table 13.5.1 Deflection limit of L/180
ANCHORAGE Designed in HILTI Profis Engineering Suite Chimney: KWIK Bolt TZ2 – SS 304 Compressor: KH-EZ Concrete Screw
Faculty Advisor: Dr. Richard Nielsen, P.E. Special Thanks: Dr. Erik Coats, P.E., Dr. Jim Liou, P.E., Dr. Fritz Fiedler, P.E.
2023 Capstone Project