Typical Water Diversion Gates and Structures

Water Supply and Storage River Inlet Gates (Water Supply and Storage Company)
  • 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)
Larimer County Number Two River Gates (Larimer County #2 Ditch Company)
  • 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)
North Poudre River Return Gates (North Poudre Irrigation Company)
  • 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 .
Number Three Canal Crossing Flume (North Poudre Irrigation Company)
  • 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
Cowan - Cemetery Bifurcation (“Overshot” check) (North Poudre Irrigation Company)
  • 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)
  Park Creek and Miners Lake Bifurcation (“Overshot” check) (North Poudre Irrigation Company
  • 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)
  Floating trash shedding boom , Terry Lake river gates. (Windsor Reservoir and Canal Company)
  • 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