Typical Water Diversion Gates and Structures

• Accumulated silt and debris removal.
• Repair (4) tractor gates.
• Remove existing rack and pinion, gear driven, electric powered operating system.
• Fabricate and install steel framing for operator support.
• Design, fabricate, and install new hydraulic operating system.
• Repair existing support structure and gate house.
• Repair concrete deterioration between gates.
• Photos: 032, 033, 034

Terry Lake river inlet gates (Windsor Reservoir and Canal Company)

• Cofferdam river to de-water gate access.
• Remove existing gates and operators.
• Fabricate new gate substructure and mount over existing concrete structure, to receive gates.
  
  • Bolt and grout into place as one unit, with four gates, (custom manufactured by Fresno) installed in place.
• Excavate river bottom and set precast blocks for toe wall.
• Pour new reinforced concrete apron in front of gates with embedded threshold for gate substructure.
• Re-fabricate existing operators, with incorporated mounting, to receive hydraulic operators for future upgrade.
• “Shotcrete” overlay existing concrete structure.
• Set precast concrete block retaining wall on upstream bank.
• Design, fabricate, and install a floating, trash shedding, boom system, to shunt floating river debris downstream.
• Photos: 019, 020, 021, 023, 024, 025, 026, 161, 127 (bottom)

• Cofferdam river to allow access to gates.
• Install precast concrete block retaining wall on river side of canal.
• Remove existing gates and operators.
• Reinforce and tie existing concrete median structure with heavy steel flat-bar to limit further deterioration.
• Pour new concrete cap for median structure.
• Design, Fabricate, and install new galvanized steel structure to receive gates, including separate structure for sand trap gate.
• Design, fabricate, install four new “tractor type” outlet gates and one new sand trap gate, (all stainless steel).
• Pour new concrete approach, and egress, aprons for both operating and sand-trap gates.
• “Shotcrete” overlay existing concrete diversion structure.
• Fabricate and install operator access decks and safety railings on entire structure.
• Remove cofferdam.
• Photos: 027, 028, 029, 030, 031, 158, 159, 160, 127 (top)

• Construct access road and staging area to both sides of the canal structure.
• Excavate for bridge abutments each side of return canal.
• Prefabricate steel bridge structure to install over return canal.
• Place prefabricated structure over canal and pour, monolithically, the bridge deck and abutments.
• Install precast concrete retaining wall to retain fill on each side above return canal walls.
• Remove the three existing gates and clear silt and rock from tunnel under canal weir.
• Fabricate new steel decking and walkways over canal and gate structure.
• Design, fabricate and install sub-frames in gate structure to receive three sealed slide gates (custom manufactured by Fresno) in aluminum.
• Install gate, gate stem guides, and stems.
• Design, manufacture, and install hydraulic operators and control system in steel enclosures.
• Control system has battery backup in case of line power failure and is designed to allow future automation and remote control.
• Photos: 050, 051, 052, 053, 054, 109, 132 .

• Lynn Parker, with, Ron Slosson P.E.   Glenn A. Gilbert P.E.(Deflection Consultant)
• Remove existing flume (syphon).
• Rip-rap bottom and sides of crossing canal.
• Construct access road to each side of the crossing.
• Install precast retaining walls on both sides.
• Install dump gate tower and piping.
•                 (Ed Tucker Construction)
• Form and pour transition and head wall structures at each end of flume.
•                   (Kiefer Concrete)
• Design and fabricate steel free span (108 feet) trussed flume with walkway and railing.
• Truck prefabricated unit to site.
•                  (Uthmann Enterprises)
• Set trussed flume into place on supports.
•                   (Sterling Crane)
• Attach end jumper sections and seals.
• Design camber was .2 feet
• dead load took .1 feet
• live load took remaining .1 feet
• Photos: 002, 038, 039, 040, 041, 042, 043

• Lynn Parker, with Ron Slosson, P.E.        (Project Engineer)      
• Construct concrete check structure.
• Design, fabricate, and install flat plate overshot gate.
  
  • Precast concrete side walls. 
  • Align and install on structure base. 
  • Position and grout in place.
• Pour wing walls in place after side walls installed
• Install canal gate and pipe for diversion.
• Install hydraulic control system with manual pump (allows addition for automation) and jumper lugs for service vehicle.
• Photos: 126 (upper)

• Lynn Parker, with Ron Slosson, P.E. (Project Engineer)
  
  • Allows minimum flows to pass down Park Creek, while diverting excess flows to Miners Lake.
  • Limits maximum flow to Miners Lake to the canals upper limit and redirects excess down Park Creek.
  • This is accomplished with an “overshot check on Park Creek working in tandem with a vertical slide gate on the canal side.
  • Both gates are fully automated and driven by hydraulic systems.
  • The preset flow conditions are set by hydraulic positioners to any desired level.
  • Construct access road.
• Precast and install bridge over canal.
• Prefabricate long-throated flume and install in existing concrete canal structure.
• Remove existing check-board assembly.
• Excavate and pour new concrete floor, toe wall, and modify upstream approach.
• Precast sidewalls for “overshot” and install on new floor (post tension and grout to floor and upstream structure).
• Design, fabricate and install flat plate “overshot” check.
• Install wet-well sensor stations for both the “overshot” gate and the vertical canal gate.
• Design, fabricate and install: the hydraulic operators, the controls for both gates, and the flow level positioners, in the automation.
• Design, fabricate and install the automation to integrate control of both gates.
• Photos: 055, 056, 057, 058, 059, 060, 126 (lower)

• A simple, reliable, low cost method to pass floating debris downstream and to keep it out of gates, tunnels, canals, or other portals.
• The boom is constructed of steel, or aluminum pipe, or of wood. The upstream end is anchored with a flexible hinge. The downstream end is free to float with the stream level and abuts a vertical post.
• Floating debris contacts the angled boom and is shunted downstream with current.
• The following photos show one such boom; designed, fabricated and installed to protect river inlet gates for Terry Lake Irrigation Company.
• Photos: 019, 020, 021, 023, 024, 025, 026, 116

Lulu Creek dump gates , Grand Ditch (The Water Supply And Storage Company)

• Functions to selectively release excess flows on the lower end of the Grand Ditch in Rocky Mountain National Park.
• Prefabricate steel bed structure and both headwall structures.
• Precast upper wing walls, inside of steel frame.
• Truck to site twenty one miles off Cameron Pass, (CO, Highway14)
• Excavate and install, bed structure, corrugated steel cross tube, and headwall structures.
• Install and weld in wing walls.
• Install tie back anchors from headwall to headwall.
• Install filter cloth, freeze expansion board, fill, and compact fill.
• Form and pour upstream approach pan and seal, under headwall and culvert.
• Downstream end of culvert is free ended.
• Deal with weather and logistical constraints at 10,700 feet above sea level.
• Photos: 133