Page 1: Table Of Contents
15-1507 Blewett Falls: Preliminary Installation Manual CONTENTS 1. Checklist 2. Positioning of the Bladders 3. Installation of Air Fittings 4. Positioning of Gates 5. Installation of Hinge Retainer 6. Main Clamp Bar, Seals, and EPDM Installation 7. Restraining Strap Installation 8.
Page 2 Right Abutment at middle of lowered gate f.1) Left Abutment at lowered gate tip plane f.2) Right Abutment at lowered gate tip plane TOLERANCE +/- 1/8” (3mm) Total out of plumb measurement must be within 1/8” of true OBERMEYER Hydro Inc. 2 of...
Page 3 Abutment Plate edge view 2” standoff 2” standoff Measured Offset at edge of at edge of plate plate TOLERANCE +/- 1/8” (3mm) No point on each horizontal line can be more than 1/8” of true OBERMEYER Hydro Inc. 3 of...
Page 4 4’ leg actually is. 5 ft b(? ft) Angle A = arccos (16 – b ) / (6b) If b = 4’, the anchor bolts are perpendicular to the abutment wall. 3 ft OBERMEYER Hydro Inc. 4 of...
Page 5 MAIN ANCHOR BOLTS SHOULD NOT VARY MORE THAN 1.5mm FROM NOMINAL SPACEING Straightness of Anchor Bolt Alignment Centerline of anchor bolts – drawn with taught string line between two outer most anchor bolts Distance of center of anchor bolt most out of alignment OBERMEYER Hydro Inc. 5 of...
Page 6 Difference between highest and lowest elevations across the spillway crest (measured near the main anchor bolts m.2) Difference between highest and lowest elevations of main anchors _______________ TOLERANCE +/- 1/4” (6mm) FOR m.1 TOLERANCE +/- 1/8” (3MM) FOR m.2 OBERMEYER Hydro Inc. 6 of...
Page 7 Distance between CL first right restraining strap block out and CL of second restraining strap block out _______ After completion of checklist, notify OHI of any tolerance issues that exist so that a proper plan of action can be created. OBERMEYER Hydro Inc. 7 of...
Page 8: Positioning Of The Bladders
NOTE: If bladders are identical; then there is no difference where each bladder is placed. Figure 1: Image of a bladder properly placed over anchor bolts OBERMEYER Hydro Inc. 8 of...
Page 9: Installation Of Air Fittings
Figure 2: Example of one method of lifting the bladders into the spillway. Bladders may also be carried in manually with multiple workers 3. INSTALLATION OF AIR FITTINGS REFERENCE DRAWING 123 One at a time, fold each bladder from left-to-right to expose the air fitting on the underside of the bladder. OBERMEYER Hydro Inc. 9 of...
Page 10 ½” hose barb with thread sealant. Thread the two pieces together very tightly. 2. Thread the male side of the ½” street elbow into the bottom of the bladder fitting very tightly. Try to end with the hose barb facing downstream (towards the air pipe) OBERMEYER Hydro Inc. 10 of...
Page 11 Figure 4: Description of steps 1 and 2 of air fitting installation 3. Assure that the embedded pipe ends with a ½” or 12mm stainless steel hose barb. Install one at this time if necessary. Use thread sealant on all threads OBERMEYER Hydro Inc. 11 of...
Page 12 6. Press the side with the small plastic tube FULLY onto the brass hose barb located on the bladder. 7. Press the side with the stainless steel hose insert FULLY onto the stainless steel hose barb located on the embedded pipe. 8. Tighten down both hose clamps. OBERMEYER Hydro Inc. 12 of...
Page 13 Visually inspect no kinks in hose Hose Clamp Tightened after hose is over both hose bards Plastic Tube Fully inserted into hose Brass Elbow and Hose Barb Assembly Connected to bladder connection OBERMEYER Hydro Inc. 13 of...
Page 14: Positioning Of Gates
Carefully inspect that the hose is falling into the air blockout as bladder is unfolded back into position. Repeat steps 1 through 10 on the remaining bladders. 4. POSITIONING OF GATES OBERMEYER Hydro Inc. 14 of...
Page 15 1. Use straps and shackles to properly secure lifting straps to lifting eyes located on gate panel. 2. Once secured, lift gate panel with crane towards is position Lifting eye to be used to lift gate Figure 8: Image of lifting eye OBERMEYER Hydro Inc. 15 of...
Page 16 GATE SYSTEM INSTALLATION PROCEDURE Printed: 10/23/2019 15-1507 Figure 9: Example of gate being lifted into place. Multiple straps are used to balance the gate as it is lifted OBERMEYER Hydro Inc. 16 of...
Page 17 Use a tie-wire to tie the hinge back to the main anchor bolts. Position the gate and cut the tie-wires to allow the hinge to fall on top of the gate. OBERMEYER Hydro Inc. 17 of...
Page 18 Main anchors should already be through the bladder main anchor holes prior to steel gate installation Figure 11: Description of hinge flap to be pulled back Figure 12: Example of hinge flap being tied back to main anchors OBERMEYER Hydro Inc. 18 of...
Page 19: Installation Of Hinge Retainer
2 ribs or between one rib and the end of the steel panel. 3. Press down first hinge section. 4. Remove plastic sleeve from each hinge stud. OBERMEYER Hydro Inc. 19 of...
Page 20: Main Clamp Bar, Seals, And Epdm Installation
20. Right Abutment EPDM The installation procedure for each of the previously listed components can be found below 6a. Abutment Seal Installation 1. Measure the distance from the abutment plate to the end of the hinge OBERMEYER Hydro Inc. 20 of...
Page 21 Measure this distance from point C on figure 15 – this is the most critical area. The upstream to downstream distance of the rectangle will be equal to measurement “B” Do not cut out the marked rectangle yet – this will be done in step 8 OBERMEYER Hydro Inc. 21 of...
Page 22 GATE SYSTEM INSTALLATION PROCEDURE Printed: 10/23/2019 15-1507 Figure 14: Abutment Seal Installation Description OBERMEYER Hydro Inc. 22 of...
Page 23 7. Measure the distance from the inside of the abutment seal to the hole that was just drilled. This measurement is called out as “D” in Figure OBERMEYER Hydro Inc. 23 of...
Page 24 “D” for all holes. Identify the position of each hole using the upstream – downstream mark and dimension “D”, and drill each hole accordingly. Figure 17: Description of steps 9 and 10 OBERMEYER Hydro Inc. 24 of...
Page 25 Cut two holes towards the top edge of the EPDM to fit over two anchor bolts. Check drawing 101 for spacing between anchors. Figure 18: Description of step 1 Have one or two workers pry the bladders up to expose the two OBERMEYER Hydro Inc. 25 of...
Page 26 Second holes for main Figure 19: Section view of EPDM anchors will be cut here Holes for hinge studs and Holes cut in figure 19 (step interpanel seal studs will 1) are located here be cut here OBERMEYER Hydro Inc. 26 of...
Page 27 Replace EPDM sheet in the proper position shown in figure 20 with all holes over their respective studs. Replace all retainers that were removed for EPDM placement, and re-torque all nuts to their required value. OBERMEYER Hydro Inc. 27 of...
Page 28 Figure 21: Silicone applied around anchor on bottom side of bladder OBERMEYER Hydro Inc. 28 of...
Page 29 Similar to the abutment seals, the interpanel seals will need to be trimmed at the base near the clamp area in order to fit next to the bladder. 1. Locate the interpanel seal; lay the interpanel seal so that the comma OBERMEYER Hydro Inc. 29 of...
Page 30 Marked cutting point is 1/8” (6mm) outside of the end of the hinge flap to create interference. Hinge Flap Figure 23: Description of steps 2 and 3 OBERMEYER Hydro Inc. 30 of...
Page 31 9. Test fit the interpanel seal and ensure that all holes cut fit over the studs. Remove seal; apply silicone around the interpanel seal studs in the same fashion as depicted in figure 14. Replace interpanel seal; fasten interpanel seal retainers with OBERMEYER Hydro Inc. 31 of...
Page 32: Restraining Strap Installation
Measure the distance that represents the strap length from the end of the clamp on the spillway to the end of the clamp on the top of the gate. OBERMEYER Hydro Inc. 32 of...
Page 33 27. 6. Raise the gate system to approximately 25% of design pressure or until the restraining straps just appear to reach a slight amount of OBERMEYER Hydro Inc. 33 of...
Page 34: Torque Specifications
Hinge Flap portion of the Air Bladder. Two adjacent Gate Panels are interspersed using the Inter-Panel Seal. MAIN ANCHOR ASSEMBLY The gate and bladder system are anchored to the rectangular channel’s concrete floor OBERMEYER Hydro Inc. 34 of...
Page 35 Panel. With the gate fully raised or fully lowered, the forces tending to pull the Hinge Flap out form under the Hinge Flap Retainers are low. At intermediate gate positions, high forces occur, which requires the Hinge Flap Retainers be kept tightly clamped. OBERMEYER Hydro Inc. 35 of...
Page 36 It provides a smooth vertical surface for the Abutment Seal that is attached at each end of the abutment end Gate Panels to seal against. OBERMEYER Hydro Inc. 36 of...