|
<br />0488
<br />
<br />.
<br />
<br />b. Removal of the pervious sandY material in the stream bed
<br />is necessary in order to eliminate the possibility of seepage.
<br />
<br />"" ." ,\.
<br />
<br />c. Stripping of the fOU!ldation and removal of all weathered
<br />shale is necessary toprovide a good' bond between the embankment and
<br />the foundation. '
<br />
<br />. " ':0..', An' adequate quantity, of suitable random borrow IlI<lterial
<br />is availa,blefori;he constructicn or'the embankment., ,," ' ,
<br />
<br />:.,\....,.,.
<br />
<br />"
<br />
<br />HI ~ HYDRAULIC DESIGN
<br />
<br />;3-01. Hydraulic requirements, -"The hydraulic requirements of the
<br />Pinon Canon Dam are ,based on effectively controlling the standard proj-
<br />ect and spillway designf'loods desci.i.bedin appendix I. The hydraulic
<br />design provides for the follcwing requirements.
<br />'..d"; ." ' .
<br />
<br />"!J.
<br />
<br />:..n.:-
<br />"~.'
<br />
<br />Outlet wor~s. "
<br />
<br />., '(I) Sufficientcajjacit,y to' 'Cjrain the reservoir 'Witq.in
<br />a reasonabl$ 'length' of time and yet . nOt e~ceed ;the downstre-am :QhanIlel, "
<br />capacitY;'~lim)r:c?l\ibined with the runoff from the ,uncontrolle,q iarea. ii,
<br />
<br />dynamic
<br />
<br />(2)
<br />ener~, of
<br />
<br />. .,"
<br />Adequate provision to dil:ll:lipate the excess hydp9'l:
<br />outflOH.
<br />
<br />.
<br />
<br />';\,,"
<br />
<br />.. .... ~ . .
<br />
<br />, b .':Spillway. ;,
<br />, "
<br />
<br />"
<br />
<br />';":'(1)'" Sul'ficient capacity to accommodate the, spillway
<br />design r16ocl:~' ,'"" '"
<br />
<br />(2) Protection of the hydraulic control at the spillway
<br />crest from scout'.
<br />
<br />3-02. Outlet works. - The outlet Horks would consist of an
<br />approach channel, trash rack structure, outlet conduit, and stilling
<br />bas:ll'('assltownon plate, 4 of, the project report. "A piloi; channel, down~
<br />streiiinf:toiii"t,he' cutlet wO'rks would, be provided to' permit' reduction in ,
<br />wall heights 'of the stilling basin. The governing feature:in the "
<br />hydra~icdesign :Lsthe uncontrolled conduit Hhich,would, be, l()cat~:
<br />about"fihe center, of' the 'dam and would extend 353 feEl,t f!;O!l\ ,entrance
<br />headwall t.o 'exit' headHall. In the interests of: suitabiJ;itry j'and,ecofJ.oll\Y','
<br />a 2-foot' square reii:tforced concrete box conduit was adppted h~viPg"'~',, ','C '
<br />3.78 sqtuire1'eet, ocf area~ ,'TheC'<'.nduit would be laid OIl 'strllight"align-' :,',:,'
<br />ment "a,nd 'a cons,'tIlht: Sl9.pedt 0.03967. At low stages ,and, part-fuD.., ";,
<br />flow, the hydr,aUlic control would be at the intake ,headwall., Flow for ',:',,;
<br />this" condition'was":computed by the 'formula: . " T ': : '
<br />
<br />.
<br />
<br />-3::'
<br />
<br />Appendix II
<br />
<br />
|