RADIAL GATE POSITION INDICATOR

The Water Control Branch of the Irrigation Division, Kansas River
Project Office, McCook, Nebraska, has designed and installed gate
position indicators on the radial gate hoists at Enders Dam. The
indicator is calibrated in feet and tenths of radial gate movement
and provides a positive and convenient means of determining the gate
opening. Photograph 1 below, shows the completed assembly and Photo-
graph 2 is a view of the hoist deck. The drawing on page 19 shows
in detail how the position indicator assembly was attached to the
gate hoist.

Photograph 1 (PX-D-66160)

Photograph 2 (PX-D-66161)

17


ceilings, budget cuts, manpower utilization, progress, failures,
incentive awards, reorganizations, and on and on, yet too little
about what an accident can do to him, his family, a visitor's family,
or to the agency.

Safety-first is a misused term and not applicable. When you plan and
do "something," consider the possible hazardous situations so that
safety-applied is a more definitive term. This should be done in the
planning stage, and followed up with your staff or crew in the exe-
cution of the project or work assignment. The job planning stage
(regardless of type or size or project) is where the accident preven-
tion effort must begin. After the job is started, the site equipment,
materials and crew members might introduce additional hazardous situa-
tions. Therefore, the two most important stages for application of
safety techniques are in planning and on the site at the beginning

of the work. Even in some of the more simple one or two man work
assignments, the supervisor should do pre-planning and check out the
beginning of the work at the site. Occasionally, a crew member is
qualified to do the planning and execution of the routine or small
work assignments, but often he forgets about the potential hazards--
so the supervisor has the responsibility to remind him when he dele-
gates to a crew member.

Without support and participation, any organization can expect to get
involved in embarrassing and critical situations which often bring on
disturbing "outside" investigations, public denouncements in the news
media, costly inefficiencies in operations, loss of operating funds to
recover from large fire destruction and for payment of employee com-
pensation and public claims, deterioration of employee morale, loss of
valuable time in "battling" criticism and complaints, and other "'acci-
dent prone" debits which could lead to a bankrupt operational image.
Accidents will happen, but these critical situations can be resolved
with much less embarrassment if a real preventive effort is evident.

The objective here is to highlight what a safety oriented and active
group of people in an agency can produce. To make real this goal you,
as a manager or supervisor, must accept your safety role responsibil-
ity and make accident prevention a part of your daily activities.
Then the agency and its people will be proud and well rewarded for
actively participating in the safety activity.

a a ed

Slogans intended to promote safety may actually retard accident-
prevention efforts. For example, "Safety First" can make employees
distrustful of a safety program because safety is, in fact, essential
to an organization's primary goal--making a profit or achieving some
other objective. Safety is better served by realism.

--National Safety News

ll


Photograph 2 (PX-D-66165)

felt that a more efficient and
dependable control was needed.

The new device consists of a
120 volt electro-mechanical
arrangement of brass, stainless
steel and aluminum corrosion-
resistant components. The pul-
leys, timing cable, cable clips
and floats are items readily
available from the manufacturer.
The device is energized by an
increase in the water eleva-
tion differential between the
upstream and downstream side of
the screens. It is not affected
by the range of operating water
surface elevations occurring
from varying canal flows. It
automatically starts the machin-
ery when an accumulation of
trash and moss creates the
required differential. The
machinery continues to run for

a pre-determined length of time to remove the trash and to bring the

differential back to a pre-set normal.

Photograph 3 (PX-D-66166)

21

Photograph 3 at left, is a view
of the complete unit and as shown
in the sketch on page 22, the
device is housed in the steel cab-
inet (5) is operated by floats (1)
and (2) which rest on the water
surface in two stilling wells, (1A)
and (2A) fed from their respective
forebays through inlets (1B) and
(2B). The floats rise and fall
equally with the normal rise and
fall of the water surface on each
side of the unit. The timing pul-
ley (6) raises or lowers an equal
amount in the opposite direction
but does not rotate. However, if
the upstream water elevation raises
with respect to the downstream
water elevation, the beaded timing
cable (3) (attached to the floats
and backwrapped around the sta-
tionary pulleys (4) and (7) will


Getting some people to wear safety glasses is often a simple
matter of "laying down the law."

It will take people who don't ordinarily wear glasses, a few days
to become accustomed to them. Once this hurdle is passed there is
no reason why properly fitted glasses can't be worn all day.

3. If your company is involved with a bargaining unit, be sure
that the requirements and enforcement policy are written in the
company/union agreement. If the costs of prescription safety
glasses are equally shared, the exact amount of the company's
maximum contribution should be stipulated in the company/union
contract.

4. Don't purchase a single pair of safety glasses unless they
meet federal specifications and USASI Standards. These stand-
ards establish levels of impact resistance, optical quality,
and specify flameproof frames. Be especially wary of the well-
meaning purchasing agent who buys from the lowest bidder with-
out checking the specifications.

5. Avoid making the mistake of trying to provide more protec-
tion than is needed for the job. Tight fitting frames which are
held in place with elastic headbands offer 100 per cent protec-
tion. But, because they are also hot and often uncomfortable,
they might wind up on top of the workman's head instead of over
his eyes. Be sure to use them where heavy impact from all sides
is inevitable. They are also effective against exposure to
chemical splash and dust.

For most exposures, the regular safety spectacles will do the
job. Even though they provide a limited amount of protection,
they are effective. The lenses in front of the eye protect
employees from direct impact and because of their light weight,
they are generally more acceptable than the side shield spec-
tacles or headband-type goggles.

6. Safety lenses should be inspected frequently for deep scratches
and pitting caused by molten metal or sparks. Pits and scratches
cause loss of the lens surface temper and may actually cause the
lenses to lose their safety qualities. (It is very important for
welders to wear clear plastic cover lenses on both sides of the
tinted glass for this reason.)

One way to emphasize the need for changing pitted lenses is to have
your safety equipment vendor demonstrate the effects of the weakened
(pitted) lenses with a standard drop ball lens testing device.

7. Your eye protection program should include all office workers
and plant visitors who walk through eye-hazard areas.


It also will be noted that the control stations for the electric
motors powering the hoist units are located approximately 25 feet
from the units; therefore, a pigtail extension is utilized to enable
the operator to read the indicator and also view the operation of the
gate as shown in Photograph 2 on the preceding page, and in Photo-
graph 3 below. Photograph 4 shows the interior of a typical control
station and the pigtail control head. This particular control is of
the spring-loaded pushbutton type, so that the moment the pushbutton
is released, the gate will automatically stop.

Photograph 4 (PX-D-66162)
18


DIFFERENTIAL FLOAT CONTROL
by
Robert Earll and Ray Pristo 1/

With the planned installation of automatic supervisory control, it
became obvious that a satisfactory differential float control had

to be developed for operation on demossing screens and silt convey-
ors in our canal system, such as that shown in Photograph 1 below.

DIFFERENTIAL
FLOAT CONTROL
CABINET

Photograph 1 (PX-D-66164)

The developed device shown in Photograph 2 on the next page, replaces
the conventional manufacturer's bladder-type control which also oper-
ated by means of a head differential between the upstream and down-
stream side of the screens. However, maintaining the proper bladder
pressure for accurate control of the screens was difficult and required
a supply of bladder diaphragms to be kept on hand for frequent replace-
ment. Also, the linkages and bellows components required close atten-
tion. After eleven years of operation and anticipating the installa-
tion of additional automatic trashracks in the canal system, it was

1/Robert Earll, Supervisor of Design and Inspection, Civil Engineering
Department, Salt River Project, Phoenix, Arizona.

Ray Pristo, Construction Designer, Civil Engineering Department, Salt
River Project, Phoenix, Arizona. 20


pepantacnt ob tuk nremon
Buneae "ar neCtawation
canttn Valcer Pasieer~ekun
CABLE ABRASION PROTECTOR
214-228-3526

Photograph 3 (PX-D-66158)

15

of the clamp. Each end of the belt
was cut out with two corresponding
5/8-inch holes to allow it to fit
over the bolts protruding from the
inside portion of the clamp. The
piece to be used as the outside of
the clamp was also drilled in a like
manner and fit over the belting and
tightened down by nuts. This pro-
vided an identical clamp for each
end of the belt.

The clamp for the bottom of the gate
was attached by welding the inside
portion of the clamp to the face of
the gate just above the cable anchor.
This was done prior to the gate being
painted. Photograph 3 at left, shows
the bottom bracket of the gate and
cable protector as it is installed
on the belting.


= ose

Brocket

[— Pipe extension ——+

Guide roliers—__| =

< * ve 7
by] o4
ELEVATION A-A ELEVATION B-B

Scace: get

Cut from §°
stl, plote

:
ie Fiber.
Guide Rotier Assembly Port © 1 reas port @ 2 ree.
GUIDE ROLLERS
scace ger’
MECHANIGAL ARM FOR INSTALLING
OPEN-FLOW METERS


The illustrations below show two different types of work performance
with workers wearing the modern safety spectacles. One shows a machin-
ist running a high speed lathe. He is wearing modern safety spectacles
with new plastic lenses for greater impact resistance. The other photo
is of an employee wearing the modern safety glasses while using a high
speed power saw.

PX-D-66150

kk eR


Inexpensive yet lightweight visitor's glasses are available
for this purpose.

In order for any eye protection program to be enforced, man-
agement personnel must set the example. With this in mind,
make sure everyone wears eye protection in hazardous areas,
at all times.

It's important to remember that eye protection programs are
humanitarian, good for morale, good for business, and are
practical. It is beneficial for all when you: "do something
about eye protection."

SELECTING THE PROPER EYE PROTECTION FOR THE JOB

THE 308

THE HAZARD

‘TYPE OF PROTECTION

ee velding and cut-
= high intensity inert

gas welding.

Radiant energy vhich is inj
tous to the eyes;

Approved veldore! helmet or hand

Ony-acetylene welding or cut~
ting, tending furnaces or
working near ultra-violet.

energy vhich is
the eyes.

Wendling strong acids, caustics;

Severe injury to the tissues of
the eyes and face. Burns.

Full acetate
extends dovn

‘Sandblasting

Severe tissue damage.

Chipping setal or cement; oper-
4

y Jack hammers, £0
drills or heavy duty grinders,

Large flying particles that may
become embedded in eyes and

Cup goggles, soft
goggles with he
faceshield wt
£ tal hs

Operating road building equi}
ment, tractors, pover shovels,

Dust, wind, heavy brush, rain,
and snow,

Soldering.

Metal splash

Regular safety spectacles with
glass or plastic lenses

Light gas cutting and gas
welding

Injurious radiant energy.

Shade 5 Filter Lenses

Gea cutting, medion; ges veld-
ing and are welding up to 30
azperes

Injurious radiant energy.

Shade 6 Filter Lenses.

Heavy gae velding and for arc
cutting and welding exceeding
30, but not exceeding 75 amps.

Injurious radiant energy.

Shade § Filter Lenses.

Are velding and cutting nore
than 75, but not exceeding
200 amperes,

Injurtous radiant energy,

Shade 10 Filter Lenses.

Arc welding and cutting nore
than 200, but not exceeding
400 amperes.

Injurtous radiant energy.

Shade 12 Filter Lenses.

‘Are welding and cutting sore
than 400 amperes.

Injurtous radiant energy.

Shade 14 Fileer Lenses.

Handy guide that can be used to determine type of safety equipment needed to protect industrial work-

fers. Included is a detailed description of the particular device to use to

ae Re

specific job hazards.


The clamp to be used at the top
of the gate was further modified
by welding to the outside piece
of the clamp, a 5/8- by 6-inch
bolt which extended up from the
clamp toward the top of the gate.
This assembly is shown in Photo-
graph 4 at left. It shows the
top clamp bolted in place on belt-
ing, with the 5/8-inch bolt in
place through top anchor bracket.

A bracket made out of 5/8- by 2-
inch angle was welded near the
top of the gate face plate, again,
prior to the gate painting, and
drilled with one 5/8-inch hole to
accept the 6-inch bolt extending
up from the top clamp. When the

Photograph 4 (PX-D-66159) top clamp is inserted into the

bracket a nut tightened on the

end of the 6-inch bolt serves as a stretcher to pull the belt tight
against the face plate. The bracket at the top holds the top clamp
out and away from the face plate.

All the loose pieces of the clamps were painted with the same VR-6
paint as was used on the gates.

The belting was installed on these gates in January 1967 and in Jan-
uary 1968, an inspection was made of the paint under the belting and
also the belting itself. The paint was in very good condition and
the belts showed no signs of scuffing or deterioration.

This method of attaching the belting to the gates appears to be far
superior to others tried. There is no rust problem evident because
once the gate is painted, the surface is not disturbed in any way.

If further information is desired regarding this idea, please write
to the Regional Director, Region 2, Sacramento, California 95825.

ee RR

There is so much good in the worst of us, and so much
bad in the best of us, that it hardly behooves any of
us to talk about the rest of us.

16


Photograph 2 (PX-D-66152)

Photograph 3 (PX-D-66153)


lege
STAINLESS Rs

STEEL PEG

S&S

DOWNSTREAM
FOREBAY

SCHEMATIC

DOWNSTREAM
STILLING WELL

W/5-40 \

HOLES FOR MTG
MERCURY SWITCHES

WEIGHTS FOR
STEADYING meee

ae
Cha

SECTION A-A A-A

Bp

Ar

—

t UPSTREAM
i FORESAY
1 |
1
! ' [2 _vesraean
in | STILLING WELL
i +
Ss3| |Cs3

DIFFERENTIAL FLOAT CONTROL

22


United States Department of the Interior, Bureau of Reclamation

IRRIGATION OPERATION AND MAINTENANCE

BULLETIN NO. 71

—_

January, February, March 1970

In This Issue:
Guarding Employees’ Eyesight
Replacing Open Flow Meters
Self-Adjusting Marker Buoy
A Real Accident Prevention Effort Pays Big Dividends
Concrete Cylinder Counterweight for High Pressure Gates
Installation of Monuments During Construction
Maintaining Paint on Radial Gates
Radial Gate Position Indicator
Differential Float Control


A REAL ACCIDENT PREVENTION EFFORT
PAYS BIG DIVIDENDS by Nat Baker

(Reprinted by permission from a recent issue of GRIST, a publication
of the National Conference of State Parks, Washington, D.C.)

Management often forgets or has never thought of the importance and
many benefits that can be realized through a sincere team effort in
searching for and initiating corrective action on potential accident
situations--human acts, work procedures, and environmental conditions.
While the usual "dollar savings" benefit always gets the attention,
numerous other benefits occur and are never evaluated. Some of these
intangible benefits do pay off too in dollars directly or indirectly.

When the "team spirit" in accident prevention has been established and
a safety conscious attitude among our people has developed, both the
Service and the employee will benefit. Often the safety effort can be
a powerful management influence "in doing things better.'' Management
often experiments with new or revised innovations, approaches and gim-
micks for improving our way "of doing things." Yet, often the same
accomplishments would have occurred if we had applied the safety man-
agement ''tool.'"'

To document all the benefits, especially the intangible ones, is diffi-
cult because often a new or forgotten benefit will result from an all-
employee safety effort. Safety pays off in dollar value and in ''good-
will." Specific benefits are cited to better understand that the safety
effort can be one of our most effective and influential management and
supervisory techniques.

Some specific benefits are cited here:

1. Elimination of accidents.

2. Elimination of other errors in supervisory or operational
procedures. Accidents are excellent "indicators" of the existence
of other deficiencies and errors.

3. Happy employees produce more and better "products."

4. Better park operations attract more people to facility, make
more use of the citizens' tax, and increase the concessioner
gross receipts.

5. Reduction in tort claim accident processing costs and payment
of approved claims.

6. Reduction of employee medical and compensation which is paid
out of our operational funds.

7. Reduction of number of family accident injury expenses.

8. Reduction of number of welfare cases where wage-earner is
killed or permanently injured, mentally or physically.

9. Reduction of property and motor vehicle damages annually
when no large fire losses occur.


SELF-ADJUSTING MARKER BUOY

(Reprinted by permission of GRIST, November/December 1969 issue.
This is a publication of the National Conference of State Parks,

Washington, D.C.)

Washer Stop

- —— Nylon Cord

Styrofoam,

Wosher Stop—_» ©)

¢
&
ca
=
=

Metol Hose Clamp

Wire —

Protect Anchor Line

Rubber Hose to

Concrete

tee Re

Peter J. McNiff recreation
specialist, Wyoming Recre-
ation Commission, designed
the self-adjusting marker
buoy and replacement shown
in the sketch below and at
left. It is used to mark
waterways on bodies of
water such as reservoirs
which have a considerable
amount of water fluctuation.

While the Wyoming Recrea-
tion Commission has used
the device primarily to
mark waterski slalom
courses, the same prin-
ciple could be used for
buoys to mark channels,
hazards, and the like.

Sproy plastic ball with rubber of vinyl paint of
proper colors

Inexpensive /
Plostic Boll

Epoxle Glue

Automobile Rack Suction Cup


REPLACING OPEN FLOW METERS

The cleaning of open flow meters in the South Gila Valley Unit is

a very difficult task under full flow conditions. The meter can

be pulled out of the bracket quite easily for cleaning, but when
replacing it the velocity of the water pushes it away from the lower
bracket. At various times in the past, it has been necessary to shut
off the delivery of water when a meter was being replaced, because
of the water velocity.

The suggestion described here was submitted by Thomas L. Cramp, of
the Yuma Projects Office, Yuma, Arizona. It was his idea to use a
“Mechanical Arm'' to replace a meter in the bracket under full flow
conditions. This device fabricated by field personnel, exerts pres-
sure on the lower drop pipe of the meter, thereby forcing the propel-
ler on the meter into the flow of water, making it easy to increase
or decrease the pressure as the meter is lowered and inserted in the
brackets. A very difficult task can be made easy when using this
device. It makes it unnecessary to interrupt water deliveries to
clean and check the meters, thereby increasing the efficiency of the
farm delivery and the measurement of the water.

An added bonus is the ditchriders safety. When using this device the
ditchrider does not have to strain his back or put himself in a posi-
tion where he may fall into
the meter box while accom-
plishing this cleaning oper-
ation.

Photograph 1 at left shows a
full view of the "Mechanical
Arm'' as described above.
Photograph 2 on next page
shows the "Mechanical Arm"
being operated by the ditch-
rider during replacement of
an open flow meter, and Photo-
graph 3 shows a view after
replacement. Weighing only

6 pounds, it is easy to handle
during the cleaning operation.
A sketch of the device is
shown on page 7.

Further information may be
obtained from the Project Man-
ager, Yuma Projects Office,
Bin 5569, Yuma, Arizona
85364.

Photograph 1 (PX-D-66151)

s


Hoist Assembly

Cable Drum

Bearing Cap, center drilled for 2" shaft.
Setscrew Collar, welded to
| Bearing Clamp Plate.

Spur Gear,!40 teeth.
ae Steel Shaft.

—“#——- Revolution Counter, Top-drive,3 digit.

YY, °°" Gear, 30 teeth.

N

Revolution Counter mounting bracket.

+— Bearing Clamp Plate ,center drilled

for 2" Shaft.

NOTE: Cross-hatched parts are
those added for indicator.

ENDERS DAM
SPILLWAY GATE OPENING INDICATORS

(Top View)

The material cost for each assembly was approximately $90.00. If
further information is desired write to the Kansas River Projects
Office, U.S. Bureau of Reclamation, P. 0. Box 737, McCook, Nebraska
69001.

a ed

The more wisely a man thinks and the more information he acquires;
the more he gains in his capacity for work and the enjoyment of life.

19


GUARDING EMPLOYEES' EYESIGHT V/
by G. J. Wolnez

Except for an industrial fatality, nothing compares to the tragedy of
losing the sight of both eyes. In spite of all that has been written
on this subject, maintenance workers continue to lose eyes. Why? Too
many employees simply refuse to wear safety glasses. This was under-
standable 20 years ago when safety glasses were heavy, unattractive
and extremely uncomfortable. Modern safety spectacles, on the other
hand, are stylish (similar to dress glasses) and offer a high degree
of protection. In fact, the newer plastic lenses are superior to glass
for impact resistance as well as optical quality. So what's the prob-
lem, and why do we still have trouble protecting the eyes of the main-
tenance working force?

Like most accidents, those that involve injury or loss of sight, are
needless, generally caused by the same people-problems that kill over
100,000 Americans every year.

Most employees are exposed to known positive motivation techniques--
films, posters, special literature, lectures, etc. Usually, though,
a tough enforcement policy must be written to get employees to wear
glasses, face shields, or eye hoods for maintenance. The number of
eyes saved is directly proportional to the time and effort expended
on an efficient eye protection program.

Remember that aside from humanitarian benefits, an eye protection pro-
gram can save many dollars that would otherwise be spent on high com-

pensation insurance rates, medical expenses, and litigation. When you
fail to provide eye protection, you may be violating a state or federal
safety code and the violation can cause more trouble than you realize.

Seven basic points should be considered in setting up an eye safety
program to ensure its effectiveness. They are:

1. Management should establish a comprehensive policy which
requires eye protection in every hazardous operation. The
policy should contain a workable method of enforcement that
is equally applied to salaried as well as shop employees.

2, Don't settle for weak enforcement programs that allow employ-
ees to remove their safety glasses in so called "safe areas."
The effect here is that glasses will not be worn at all, because
people will forget to put them on when they return to the hazard-
ous area. Although requiring eye protection is ridiculous in
some areas, it must be enforced to make your program effective.

1/Reprinted from Plant Engineering, issue date of November 28, 1968,
by special permission of the Managing Editor.


CONCRETE CYLINDER COUNTERWEIGHT
FOR HIGH PRESSURE GATES

During the annual maintenance review of major structures at Merritt
Dam, Ainsworth Unit, Nebraska--Missouri River Basin Project, it was
reported by the Irrigation
District personnel that they
were experiencing some diffi-
culty holding constant gate
openings in the river outlet
works. As the reservoir was
lowered during the course of
the irrigation season, the
tendency for the gates to
creep towards a closed posi-
tion increased to the point
where adjustment to maintain
constant releases was required
about every two hours.

To correct this condition the
District has installed a 6-
by 12-inch concrete cylinder
counterweight on each of the
river outlet works gates.
PX-D-66154 See photographs at left.

This arrangement has proven
very satisfactory according
to reports from District per-
sonnel. In fact they were
so pleased with the results
achieved on the river outlet
works gates that they are
proceeding with the same type
installation on the gates in
the canal outlet works con-
trol house.

Additional information about
this idea can be obtained by
writing to the Regional Direc-
tor, Regional Office, Region 7,
Denver Federal Center, Denver,
PX-D-66155 Colorado 80225.

kkk Re

12


MAINTAINING PAINT ON RADIAL GATES

Protecting the paint on the skin plates of radial gates has long been
a problem to operation and maintenance personnel in those instances
where cables are attached to the upstream face of the gate. As the
gates are raised and lowered, the cables chafe and break the seal of
the paint. Since the early 1950s on the Friant-Kern Canal, a number of
ideas were tried to prevent the damaging of the paint on radial gates;
but none of them proved to be very satisfactory. Then a program of
repainting all of the radial gate structures with a VR-6 vinyl resin
material was begun.

Since a considerable expense was
incurred in providing this type of
paint on the gates, it was decided
that new effort should be made to
solve the problem of cable chafing
and damage to the paint. An idea
was suggested that a strip of con-
veyor belting which was on hand be
placed between the cable and the
newly painted surfaces. One of the
problems was how to attach the belt-
ing in such a manner that it would
be held rigidly in place without
drilling the skin plate of the gate.

The strips of 1/2-inch belting are
8 inches wide for gates with single
cables on each side and 10 inches
Photograph 1 (PX-D-66156) wide for those with double cables.
The strips are long enough to pro-
vide protection for the full length
of cables along the gate face.
Photograph 1 at upper left shows
the top of a check gate and Photo-
graph 2 shows the bottom section
with the belting installed.

With reference to the sketch on the
next page, a clamp for each end of
the belt was fabricated by cutting
out two pieces of 5/8-inch steel
plate, 2 inches wide and 8 to 10
inches long, or enough to cover the
width of the belt. Two 5/8- by 2-
inch plow bolts were welded to one
piece to serve as the inside portion

Photograph 2 (PX-D-66157) 14


IRRIGATION OPERATION AND MAINTENANCE
BULLETIN NO. 71

January, February, March 1970
INTRODUCTION

Starting on page 1 is an article taken from Plant Engineering, which
describes the need for an efficient eye protection program and gives
seven basic points to be considered.

An idea for replacing open flow meters simply and economically with
the use of a special tool called a "Mechanical Arm," can be found
on page 5.

A self-adjusting marker buoy is described on page 8, it is used by
the Wyoming Recreation Commission to mark waterways where there is
considerable reservoir fluctuation. However, it can be adapted to
any waterway where the need for such a buoy exists.

Although this article entitled "A Real Accident Prevention Effort
Pays Big Dividends," starting on page 9, was written especially for
the National Park Service, we feel it presents a message of general
interest.

By using concrete cylinders as counterweights on their high-pressure
gates, this article on page 12, shows how the Ainsworth Unit in
Nebraska solved a problem in gate creep.

"Installation of Monuments During Construction," is the title of an
article on page 13. This suggestion will make it less difficult to
locate permanently submerged structures in the future.

The idea on page 14 to use belting to prevent paint damage on radial
gates was contributed by Bureau of Reclamation forces on the Central
Valley Project in California. It was noted in a recent regional
report of a biennial examination made under the Review of Mainte-
nance Program.

The spillway gate opening indicator illustrated in an article begin-
ning on page 17, was designed and installed on the radial gate hoists
at Enders Dam. With the pigtail extension on the controls observa-
tion of the gates during operation is possible.

The new differential float control device noted in this article on
page 20, was- installed by the Salt River Project, Phoenix, Arizona,
to control demossing machinery. They advise that the device has
proven so successful they have installed it in other areas on the
project.


rotate the timing pulley. The peg (9), adjustable in slot (12) on

the pulley, will pivot cam (10), energizing the mercury switch (11)
which starts the demossing machinery. The machinery then runs until
the water levels return to normal.

Mercury switch (13) is adjusted to signal an alarm in the Dispatch
Center in the event the differential should reach an unsafe condition,
which could occur if excessive amounts of trash and moss gathered on
the screens. Micro switch (15) is activated by the raising of disc
(14) attached to the timing cable which signals an unsafe high water
condition in the upstream forebay (8) of the structure.

One of the new devices has been in operation for five years. Four
more have been installed to control other demossing machinery in the
canals in the past four years. Only periodic light lubrication of
the pulley bearing has been necessary and no breakages or worn out
parts have been experienced to date.

ek eR

23


The Irrigation Operation and Maintenance Bulletin is published quar-
terly, for the benefit of irrigation project people. Its principal
purpose is to serve as a medium of exchanging operation and mainte-
nance information. It is hoped that the reports herein concerning
labor-saving devices and less costly equipment and procedures, devel-
oped by resourceful project people, will result in improved efficiency
and reduced costs of the systems for those operators adapting these
ideas to their needs.

To assure proper recognition of those individuals whose suggestions
are published in the bulletins, the suggestion number as well as the
person's name is given. All Bureau offices are reminded to notify
their Suggestions Award Committee when a suggestion is adopted.

ke RR

Division of Irrigation Operations
Office of Chief Engineer
Denver, Colorado 80225

COVER PHOTOGRAPH:

Employee in the Bureau of Reclamation
Engineering Laboratory, Denver,
Colorado, using a modified power

saw, wearing protective goggles and
a breathing device while cutting
through an 8-foot-diameter rein-
forced plastic mortar pipe. Photo
PX-D-66148



10. Reduction of time lost in getting and training replace-
ment personnel as craftsmen, specialists and professionals.
11, Reduction in personnel replacement costs where personnel
turnover is unusually high.

12. Management time saved by the elimination of the need to
reply to the criticism of next-of-kin, public inquiries or
other-wise get involved.

13. And you can probably think of other dollar-loss items
that would be spared.

Using injury cost figures and adding the indirect costs (4-1 ratio or
indirect costs four times the direct cost) a total cost for all acci-
dents can be estimated. In industry the competition has become so

great that their "savings" through an aggressive safety effort has now
become a substantial addition to their annual net profit dollar total.

Now some of the "good will" benefits which an all-employee safety
effort can provide:

1. A cooperative and proud community and national citizenary
image.

2. An enjoyable, healthy, and relaxing environment with
safety for people.

3. Happy employees promote the good public relations image.
Most problems for management originate from the "acts" of an
unhappy employee.

4. For pleasurable existence for employee and visitor
families.

5. Opportunity for supervisor to know each employee per-
sonally so he can be a better "counselor."

6. Opportunity for supervisor to set the example which is
the one most effective method to establish safe attitudes
among his employees.

7. Opportunity for supervisor to give each of his employees
a chance to realize his ambitions and dreams. Phycologists
say that only about 15 percent of our ability, talents, and
skills are developed in a lifetime, for lack of an opportunity,
personal laziness, or illness.

8. And you can probably think of other "good will" elements
that can be realized by a sincerely accident preventive con-
scientious group of people.

The organization safety effort can win friends and influence people!
What greater investment with as many dividends, can you think of,
than an agency-wide employee cooperative safety effort?

Management and supervision in operations have to give daily "doses"
of prodding to the employees. The employee hears about personnel

10


INSTALLATION OF MONUMENTS DURING CONSTRUCTION
(Suggestion R2-69S-73)

This suggestion is presented by James L. Andrews, of the Regional
Design and Construction Office, Region 2, Sacramento, California.
He suggests the installation of monuments during construction that
will be used for locating structures which will eventually be per-
manently submerged under reservoir water.

During the past 3-1/2 to 4 years that the Region 2 underwater exami-
nation team has been in operation, there have been several occasions
where the actual work of examining a structure was incidental and
much less time consuming to locating the structure under water. This
very real problem of locating continuously submerged isolated struc-
tures located in reservoirs, primarily outlet works intake structures,
comes about usually because the only data available is a very small
scale drawing which invariably has not been revised to show "as built"
status.

After a survey of all regions, the subject suggestion has been adopted
by the Bureau of Reclamation. It will be used for the first time in
Specifications for Teton Dam that is to be constructed on the Teton
River in Idaho. Monuments also will be included as a part of the final
construction of all Bureau projects having this type of isolated con-
tinuously submerged structure.

A set of two monuments will be provided with appropriate bearings to
locate by intersection the structure in question. The location of the
monuments and bearings to submerged structures is to be included as a
part of the designers operating criteria or other instructions as a
matter of record.

There are numerous permanently submerged structures in existence on
many Bureau Projects that would be extremely difficult to locate if the
need arose. It could be that the provision of monuments for locating
these structures should be considered. The cost of their location and
examination could be quickly repaid.

kk eR

The All-American Canal System of the Boulder Canyon Project in Cali-
fornia, has passed the $3 billion mark for crop production or 52 times
the Federal investment, according to the Commissioner of Reclamation.
The All-American Canal began delivering Colorado River water to the
Imperial Irrigation District in 1941 and to the Coachella Valley County
Water District in 1949.

13