Representative Reservoir Head Gates and Operators | Parker Construction and Machine

Black Hollow Reservoir (Water Supply and Storage Co.)

Rehabilitate existing tower gates (4).
Design, fabricate and install new gate stems, hydraulic cylinder operators and hydraulic control system.
Fabricate and install new precast concrete gate tower house.
Photo: 125

Long Draw Reservoir (Water Supply and Storage Co.)

Remove existing underwater cylinder operators (2).
design, fabricate and install new gate stem, hydraulic operators, and hydraulic control system in gate tower house.
Photo: 151

Halligan Reservoir (North Poudre Irrigation Company)

Remove existing limit torque operators.
Repair gate stems (2) and add operator mounting, fabricated base, to top of dam.
Design, fabricate, and install davit crane and cable anchors on dam to accommodate installation of new operators and control system.
Design, fabricate and install new hydraulic operators and control system on top of dam.
Install remote control operators in control house located above dam site.
Photos: 124, 090, 091, 092, 093, 094, 104, 105, 106, 107, 108, 139, 140, 141

Sanchez Reservoir (Sanchez Reservoir Company)

Lynn Parker, with Ron Slosson, P.E.(Smith Geotechnical)
Replace (9) head gates and manual operators with hydraulic gates and operators
design, fabricate, and install hydraulic operating system in existing outlet gate tower house. The system allows remote control of selected functions from a wireless, on shore, controller.
Photo: 114

Dixon Reservoir (City of Fort Collins)

Excavate silt to allow access to outlet gate.
Install precast blocks to provide a silt barrier.
Construct a new “poured in place” gate mounting block.
Install gate and manual operator.
Oversee installation of “Shotcrete” overlay on existing rock, gravity dam.
Photo: 128 (top)

Comanche Reservoir (City of Greeley)

Investigate gate operational problem.
Submit a design / build solution (execute on bid)
Design, fabricate and install a gate stem, directional, transition section to accommodate- stem to gate- misalignment.
Design, fabricate, and install a hydraulic operator and control system
Modify, repair and remount existing “oil filled” stem system.
Photos: 110, 111, 112

Elder Reservoir (Larimer and Weld Irrigation Company

Project Engineer (Smith Geotechnical)
Design fabricate and install hydraulic operator and control system on new outlet structure
Photos: 044, 045, 046, 128 (bottom)

Larimer and Weld Number Eight Reservoir (Larimer and Weld Irrigation Company)

Lynn Parker with Project Engineer (Smith Geotechnical) Dave Marsh P.E.
Design, fabricate, and install hydraulic operator and control system for operating face gate on new outlet structure.
Design fabricate and install automation system for maintaining Elder Reservoir water level to within 0.1 feet, at any desired level, from any level of number Eight Reservoir.
System is battery “backed up” and will function without line power as long is battery voltage is maintained.
Control levels have double redundancy incorporated into the design.
Photos: 047, 048, 049

Rocky Ridge Reservoir Number Four (Water Supply and Storage Company)

Rebuild gate thimble in place (steel faced, half lapped timbers)
Rehabilitate cast iron gate and guides.
Rebuild manual “gear reduced” operator and reinstall operator on dam. Install new stem in capped tower.

North Poudre Reservoir Number Ten (North Poudre Irrigation Company)

Stem Replacement
Excavation of silt from gate intake area and installation of precast concrete fore-
Bay silt barrier.

North Sterling Reservoir (North Sterling Irrigation Company)

Rebuild (4) operating cylinders on face gates.
Replace hydraulic lines through fabricated, sealed, manifold and through chase to tower base (schedule 80 stainless steel).
Replace lines from Hydraulic operator in gate tower house, down, to bottom of tower.
Photo: 165

Big Windsor Reservoir (Windsor Reservoir and Canal Company)

Rehabilitate cast iron tower gates (2) and install new guides.
Reseal gate stem casings

Terry Lake (Windsor Reservoir and Canal Company)

Rehabilitate cast Iron tower gate and install new gate guides.
Rehabilitate face gate.
Reseal gate stem casings

Indian Creek Reservoir (North Poudre Irrigation Company)

Rehabilitate cast iron tower gate and install new gate guide bars.
Fabricate and install new stainless steel gate stem and stem guides

Horse Shoe Lake (Seven Lakes Irrigation Company)

Lynn Parker, with John Gauthiere, P.E. (Project Engineer)
Excavate silt and coffer dam inlet and outlet ends of tunnel, to maintain four foot water level in reservoir.
Rehabilitate cast iron tower gate.
Fabricate and install new stainless stem and stem guides.
Install new geared operator in gate tower house.
Enlarge staging and parking area at dam and construct precast retaining wall to accommodate.
Photo: 157

North Poudre Reservoir Number Three (North Poudre irrigation Company)

Emergency Project, Coordinated with the owner, The Colorado Division of Water Resources (the state engineer), Parker Construction and Machine, Ronald Slosson, P.E., and the town of Wellington Colorado.
- The Reservoir supplies water for irrigation, in season, and for domestic use by the town of Wellington on a year around basis.
- The lake needed to be drained to allow for repairs to the main gate. The decision was made to modify the gate tower intake pipe structure to receive a vertical face or guard gate. This method allowed for two advantages.
  - The hydraulic operated gate could be installed quickly without a long term disruption of Wellington's primary water Supply The tower gate could be isolated for future maintenance, without draining water from the lake.
A steel, gated, coffer dam was installed and a removable “jumper” pipe was fit through the modified gate structure to pass minimum flows during construction.
A new galvanized steel gate thimble was fabricated to fit a (Rodney Hunt) cast iron gate, which the owner had in inventory.
The thimble was fit and poured into the headwall, monolithically, with the structure cap.
An underwater hydraulic operator, along with a hydraulic operator for the tower gate, and a common control system were designed, fabricated and installed.
A steel pipe grade beam was prefabricated, through which passed a hydraulic line conduit, a gate position indicator conduit, and air lines.
- The beam was set into place by a crane and anchored to the dam face by top and bottom piers and three mid piers, all poured in place when the beam was pressure grouted with Portland cement concrete grout.
The guard gate and the underwater hydraulic operator were installed, along with hydraulic lines, air lines, and the gate position indicator.
The tower gate was repaired and a new, stainless steel, fabricated gate stem, and stem guides, were installed.
The hydraulic operator was installed and integrated with the system. The gate position indicator was installed and calibrated.
The rip-rap was replaced, (a unique system was designed and employed for this process).
A precast concrete tower house was installed and line power service was run underground to the house.
These steps were closely preceded, in harmony, with the state engineers review process.
Water was restored to the town of Wellington, CO.
Photos: 122, 069, 070, 071, 072, 073, 074, 079, 076, 077, 078, 079, 080, 081, 082, 083, 084, 085, 086, 087, 088, 089, 101

Boyd Lake (Greeley and Loveland Irrigation Company)

Lynn Parker with John Gauthiere, P.E. (Project Engineer)
Investigate closing problems on submerged hydraulic operator.
Fabricate pneumatically sealed plug for lake outlet tunnel.
Install plug, with diver team, to seal off tunnel from lake.
Dewater tunnel and tower by pumping outlet wet well (750 gpm).
Remove existing operator.
Fabricate new stem, stem guides, and operator, to install in existing tower.
Retrofit existing hydraulic source, retrofit controls, and reinstall.
Fabricate new steel enclosure for tower cap and operator
Fabricate steel lid for outlet wet well. Grout defects in wet well structure.
Install precast retaining wall to prevent siltation of wet well from storm runoff.
Grade area to control surface runoff
Photos: 016, 017, 121, 156

Ryan Gulch Reservoir (Ryan Gulch Irrigation Company)

Remove existing stem and tower gate.
Construct “rock fill” access to road gate intake structure.
Remove concrete structure
Install coffer dam and “flow Jumper pipe” to allow replacement of outlet pipe end sections and the forming of a new concrete intake structure.
Fabricate replacement stainless steel tower gate, and new stainless steel gate stem assembly.
Remanufacture existing gear reduced gate operator.
Rebuild tower cap; install gate, gate stem, and operator.
Required remote controlled valve, to accommodate the flooding of the outlet and gate tower, in order to negate head against the plug and allow for its removal after tower gate was closed.
Fabricate plug for outlet structure to allow filling of reservoir to start prior to gate installation.
- Plug required valve, to accommodate the flooding of the outlet and gate tower, in order to negate head against the plug and allow for its removal after tower gate was closed.
Photos: 115, 153, 155

Chambers Lake (Water Supply and Storage Company)

Chambers Lake operating system was accomplished in two parts
- 2004
  - Existing operators (4) were removed.
  - Hydraulic operators and control system were designed, fabricated, and installed.
  - False chimneys were cut into the roof of the historic “log cabin” gate control house.
  - These chimneys allowed for the projection of the, pedestal mounted, inverted hydraulic cylinders through the roof.
  - Provisions were made to allow for future full time power, automation, and remote control.
  - Photos: 119, 035, 036, 037, 152
2007
- Road was cut to inside bottom of dam.
- Coffer dams were placed to allow (22-CFS) of water to flow through two tunnels at a time (four tunnels total) so the other two gates could be accessed. (Tower is capped at eight foot level and gates are not accessible from above.)
- Gate stem connections were defective and Water Supply elected to replace all four gate stems.
- Barker Construction cut new access road, stabilized dam, and added rip-rap, while Parker Construction fabricated stems.
- New stems were installed in coupled sections down through vertical stem casings.
  - The new gate stem attachments were made in progression with the gate stem installation.
- The four cast iron gates (circa 1905) were thoroughly inspected and negligible deterioration was evident.
  - Lack of corrosion may be attributed to the quality of water found at this elevation (9500 feet above sea level).
- Photos: 120, 167

Fossil Creek Reservoir (North Poudre Irrigation Company)

Core access holes in tower house roof and floor to allow crane cables through to support man-baskets as well as to remove and install gate stems.
Fabricate and install new stainless steel gate stems, and gate stem guides.
Repair and recalibrate existing (Limitorque) operators and install redundant travel limits to protect stems from over pressure upon closure.
Fabricate and install new gate position indicators in the gate tower house.
Design, fabricate, and install flow diffuser plates on bottom half of gate thimbles in order to mitigate dissolved gas induced cavitation at operating flows.
Recalibrate Parshall Flume to accurate flow conditions.
Trouble shoot, repair, and calibrate electronic flow meter in gate house to reflect actual flow through Parshall Flume.

Cobb Lake (Windsor Reservoir and Canal Company)

Remove operators, gate stems, and gates.
Fabricate new tower cap frame, install and pour in place.
Cofferdam lake and remove five feet of silt and debris from tower with crane and hydraulic clamshell bucket.
Existing cast iron gates were deteriorated beyond use. Replacement gates were not commercially available.
Gate size (4 ½ by 6 ½ feet) made fabrication with stainless steel complicated. The decision was made to use 304 stainless steel castings and machine to fit.
Pattern was fabricated, in house, and the castings were poured and machined locally. The bronze seals were fabricated and installed in house. The total cost was one fifth of that estimated for Dealer custom manufacturing and the turnaround was in two months instead of nine.
The gates, gate stems, and guides were installed and new retainer bars of, stainless steel and Delron, bearings were fabricated and installed.
Hydraulic operators and controls were designed, fabricated, and installed.
A new concrete gate tower house was precast and installed in sections.
Photos: 117, 118, 006, 007, 009, 010, 011, 012, 013, 014, 015, 006, 007, 008, 009, 010, 011, 102

Miners Lake (North Poudre Irrigation Company)

Lynn Parker, with Ron Slosson, P.E.(Project Engineer)
Four gate system: (Hydraulic), two tower gates, one face gate, and one eight inch drain gate.
Installed gates and gate stems on new reservoir dam.
Designed, fabricated, and installed hydraulic operators and control system.
Designed system to accommodate stand-by power and twelve volt d.c. Backup.
Photos: 061, 062, 063, 064, 065, 066, 067, 068

Tumblesome Lake (Boy Scouts of America, Denver Council)

Project Engineer (Gauthiere Engineering)
Wintertime project (9200 feet above sea level)
Drained lake to approx eight feet deep, leaving enough water to preserve fish.
Constructed “rip-rap” road to access face gate through bottom of lake.
Removed existing gate, operator, pedestal, and stem.
Installed a temporary steel coffer dam with an integral gate to control water level in lake.
Retrofitted existing gate intake structure to receive a fabricated galvanized steel thimble, anchored thimble in place and poured a concrete overlay.
Fabricated and installed a steel pipe grade beam, containing the stem casing for the gate, and to mount the stainless-steel staff gage.
- This beam was supported by concrete pedestals, anchored into the dam with helical piles. The steel beam was then grouted full with a Portland slurry mix.
A new (Rodney Hunt) gate was installed along with an oil filled stainless steel stem casing and stem. The casing was embedded into the grade beam.
A new geared operator was installed.
A new toe drain was installed in the base of the dam.
A new concrete outlet structure was formed and poured in place below the dam.
A removable “V” notch weir was fabricated to allow augmentation discharge measurement.
Two feet was added to the top of the dam to comply with increased free board requirements.
Bentonite was added to the interface of the dam and the rock monolith abutment to help seal rock fissures.
Photos: 095, 097, 098, 099, 100

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