Obermeyer Hydro 15-1507 User manual

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. Torque Specifications
9. Index
1. CHECK LIST
Prior to installation, it is recommended that the checklist provided in this manual
is reviewed. It is much easier to fix an issue with the anchor bolts or
abutment plates prior to gate installation.

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Abutment Plate Check List
A. Abutment face to Abutment face dimension
a) At base near anchors
b) At tip of gate in up position
c) At tip of gate in down position.
B. Abutment Plate Plumb (difference between top and bottom of each section) Use a
weighted string line that is a measured distance from a point on the top of the abutment place, then
measure the distance of the bottom of the string line to the point on the bottom of the abutment plate.
The two horizontal measurements should be the same.
d.1) Left Abutment at anchor bolt plane
d.2) Right Abutment at anchor bolt plane
e.1) Left Abutment at middle of lowered gate
e.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
c
b
a
d
e
f
TOLERANCE +/- 1/8” (3mm)
All three measurements should be within 1/8” of true
PER DRAWING
TOLERANCE +/- 1/8” (3mm)
Total out of plumb measurement must be within 1/8” of true

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C. Abutment Plate Horizontal Flatness (deflection across plate)
g.1) Left Abutment vertical at anchor bolts
g.2) Right Abutment vertical at anchor bolts
h.1) Left Abutment vertical middle
h.2) Right Abutment vertical middle
i.1) Left Abutment vertical gate up
i.2) Right Abutment vertical gate up
g
h
i
Abutment Plate edge view
2” standoff
at edge of
plate Measured Offset
Sketch shows section looking at top or side of abutment
plate – using a taught string line between the two
standoff points.
2” standoff
at edge of
plate
TOLERANCE +/- 1/8” (3mm)
No point on each horizontal line can be more than 1/8” of true

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D. Squareness of Anchor Bolt Alignment to Abutment Plate
j.1) Angle between Left Abutment and Centerline of anchor bolts
5 ft
b(? ft)
3
ft
A
B
C
Calculate Angle A by laying out a 3-4-5 triangle
and then measure what the 4’ leg actually is.
Angle A = arccos (16 – b
2
) / (6b)
If b = 4’, the anchor bolts are perpendicular to
the abutment wall.
Actual Angle
Left Abutment Actual Angle
Right Abutment
TOLERANCE 90 degrees +/- 0.1 degrees

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a. Main Anchor Bolt Check List
A. Anchor Bolt Spacing
k.1) Distance between Right Abutment Plate Face to Center of nearest anchor bolt
k.2) Distance between left Abutment Plate Face to Center of nearest anchor bolt
B.
Straightness of Anchor Bolt Alignment
Left Abutment Plate Right Abutment Plate
N1 = distance from face of right
abutment wall to centerline of first
main anchor bolt
N2 = distance from face of left
abutment wall to centerline of first
main anchor bolt
PER DRAWING:
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
TOLERANCE +/- 1/16” (1.5mm)
MAIN ANCHOR BOLTS SHOULD NOT VARY MORE THAN 1.5mm FROM
NOMINAL SPACEING

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l) Distance between center line of anchor bolts and bolt most out of alignment
b. Concrete Check List
Elevation (top of concrete & anchors) Across the Spillway
m.1) 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 +/- 1/8” (3mm)
MAIN ANCHOR BOLTS SHOULD NOT VARY BY MORE THAN 3mm IN
HORIZONTAL ALIGNMENT
TOLERANCE +/- 1/4” (6mm) FOR m.1
TOLERANCE +/- 1/8” (3MM) FOR m.2

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Positioning of Blockouts
o.1) Distance between Left abutment wall and centerline of first air assembly block out __
o.2) Distance between CL first left air block out and CL of second air block out _ _ ___
p.1) Distance between Right abutment wall and centerline of first air assembly block out __
p.2) Distance between CL first right air block out and CL of second air block out __
q.1) Distance between Left abutment wall and centerline of first restraining strap block out _
q.2) Distance between CL first left restraining strap block out and CL of second restraining strap
block out _______
r.1) Distance between Right abutment was and centerline of first restraining strap block out ___
r.2) 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.
Distance between Left
abutment wall and
centerline of first air
assembly block out
Distance between
centerline of first air
block out and center of
second air block out

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2. POSITIONING OF BLADDERS
1. Use straps and a lifting mechanism to lift each bladder into position.
You will know each bladder is in the correct position because the
large holes in the bladder will fit over the anchor bolts.
2. Fit the first 6 bladder holes from left to right over the first 6 anchors.
There is no need to fit the remaining holes over the remaining
anchors, because the bladder will be folded from right to left in the
next step.
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

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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.

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Once the bladder fitting is exposed (reference 123):
1. Cover male side of ½” street elbow with thread sealant. Cover brass
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)
Fold bladders back in this direction
(side to side) to expose
air fitting.
Figure 3: Direction of bladder folding

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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
THREAD SEALANT
THREAD
TOGETHER
TIGHTLY
THREAD INTO
BLADDER
FITTING
TIGHTLY
TRY TO END
WITH HOSE
BARB POINTING
DOWNSTREAM
Figure 4: Description of steps 1 and 2 of air fitting installation

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4. Locate the long hose, insert the stainless steel hose insert and small
plastic tube into hose.
5. Insert a stainless steel hose clamp over the top of each end of the
hose
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.
THREAD
SEALANT
THREAD TO
EMBEDDED AIR
LINE (ADAPTERS
WILL BE
NECESSARY)
Figure 5: Description of step 3

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NOTE: Hose will do a full loop between both connections, as
shown on 123. Visually inspect the assembly to make sure no leak
paths or kinks in the hose exist.
Stainless hose barb
Connected to embedded
pipe
Stainless steel hose insert
Fully inserted into hose
Hose Clamp
Tightened after hose is over
both
hose
bards
Hose
Hose will create a loop in
between both barbs.
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 conne
c
tion

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9. Apply spray foam into the air block out (50% full)
Figure 7: Description of step 9
10. Visually inspect air connection once more to assure all
connections are tight and no leaks can occur. Fold the bladder back
over so that all large bladder holes go over anchor bolts. Carefully
inspect that the hose is falling into the air blockout as bladder is
unfolded back into position.
11. Repeat steps 1 through 10 on the remaining bladders.
4. POSITIONING OF GATES
Figure
6
: Description of steps 4 through 8

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Using a crane each can now be lifted into its proper position.
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
Figure 8: Image of lifting eye
Lifting eye to be used to lift gate

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Figure 9: Example of gate being lifted into place.
Multiple straps are used to balance the gate as it is
lifted

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Figure 10: As gate is lifted into place, multiple workers are helping guide the gate towards the correct position
3. As gate is near the correct position, the hinge flap of the bladder will
need to be pulled up to make room for the gate to fit into it. When
the hinge is pulled up and the gate is properly positioned, the hinge
holes in the bladder will fit over the hinge studs located on the
bottom edge of the gate. There are two methods to pulling the hinge
flap up to make room.
a. Use multiple workers to pry the hinge up by hand. The gate will
need to be slowly lowered and re-positioned as the hinge is pulled
up and over the gate all the way across the gate.
b. 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.

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c.
Figure 12: Example of hinge flap being tied back to main anchors
Hinge Flap
Must be pulled up to fit gate
Base of gate is to be
inserted into this gap
Hinge studs located on
bottom of gate should go
through hinge holes when
properly positioned
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

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4. Repeat steps 1 through 3 on all gates.
5. INSTALLATION OF HINGE RETAINERS
REFERENCE DRAWING 121
1. Locate the hinge retainers. Review drawing 121 to see where
each retainer is to be located.
2. Start at the left side of the spillway. Have one worker pull back
on the first section hinge to expose the hinge studs underneath the
hinge flap. Meanwhile, have another worker apply a bead of
silicone on the gate panel around each of the hinge studs in the
section. Also apply silicone around the base of the ribs located on
one or both sides of the section
NOTE: Each “section” of hinge is the amount of studs present between
ribs or to the end of the gate.
Figure 13: Description of step 2
3. Press down first hinge section.
4. Remove plastic sleeve from each hinge stud.
Red line represents the
area to apply silicone
Hinge flap will be present,
must be pulled back to
apply silicone
Silicone bead also applied
around base of rib
Hinge section is defined by
the amount of studs
between 2 ribs or between
one rib and the end of the
steel panel.
Remove plastic sleeves
from hinge st
uds

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5. Apply anti-seize to each of the hinge studs.
6. Place hinge retainers over each set of hinge studs as shown in
drawing 121
7. Place a flat washer over the first set of hinge studs, as shown in
section A-A of drawing 121.
8. Thread a nut onto the first set hinge studs, as shown in section A-
A of drawing 121.
9. Torque each nut to the anchor torque specification section below.
10. Repeat steps 1 through 7 across the entire spillway each hinge
section at a time.
6. Main Clamp Bar, Seals, and EPDM Installation
At this stage in the gate installation, it is easiest to install the rest of the
components from left to right across the spillway
1. Left Abutment Seal
2. Left Abutment EPDM
3. Gate 1 Main Clamp Bars
4. EPDM seal 2
5. Gate 2 Main Clamp Bars
6. Interpanel Seal 1
7. EPDM seal 3
8. Gate 3 Main Clamp Bars
…..
18. Final Gate Main Clamp Bars
19. Right Abutment Seal
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