| Show GO ENGINEER I T REPORTS ON RESERVOIR DAM SPEC fiCA to f Slight Changes Chang s to Be Made in f J I Interest of of- Safety and Economy I Special t to The I I- I Ogden Sept Sopt 29 Government Z-Government Government Engl- Engl neer eer Samuel Fortier toda today submitted his 3 u report on tho pr proposed posed stora storage c reservoir reser- reser voir located on the south fork of or Og- Og I i don uon ori river tl which Is being being- built b by tho the thor thor the Ogden River flyer Reservoir r r city and s company compan Mr Fortier was authorized A- A of ot agriculture ag at b by th the secretary Washington D. D C. C to pass on the dam sUe and plans and sp specifications or of orio orA A Jc io the reservoir r It T In his report tho the expert approves the f 7 plans but recommends a number of or changes among them being that a at t I twel c twelve Inch S sew sewer W r l' p pipe ppe pe bo pl used In place h 0 of i six Inch drain tile aiso alSO mat ino nc l earth work on the upper sl side e of or the stream bo ho three to one ono Instead of two a to one He also recommends that tho the company and city build the dom dam sufI sufi suf- suf i it high to impound acres 2 T of ot water to start with In order to reV reduce re- re I V- V duce the cost of or the water to be fin im- i pounded In his opinion the core- core wall which Is to be built bunt of reinforced cement Is too expensive and he recommends recommends rec rec- a material reduction In U Ur the tho r J cost without nn any sacrifice of safet safety jI 0 Mr Fortier says bays that from present f Indications one ma may conclude that a safe afo and stable formation can be se secured se- se cured but Insists on removing all A shattered rock cleaning out each crack 1 and excavating deeper j According to tho government man an error was made in locating tho center 1 p. p 11 line lino no of the dam along which the concrete concrete concrete con con- crete wall core-wall was to have been v placed the north northend end being being- too far fart t t has hns been In upstream The Tho error part 5 corrected however Q by ly making an anKle an- an gb Kle Jle or elbow In the center line of the dam b by swinging Ing the tho north end about seventy feet leel downstream As the work v of e excavating pro progressed along the tho corrected location the bedrock was found round to bo be not only much broken r but irregular and out of place over a av v distance not vet accurately determined t 1 near the middle of the axis of ot the dam t Mr Ir Fortier call called cl on Dr F. F J. J Pack head of the department of geology olo at atthe atthe the University Uhl of or Utah for tor an opinion AH tK to to th the formation Dr Pack reported that the rocks In the Immediate vicinity vicin- vicin 1 U ity of the proposed dam site consist of massive and partly fc Ii grated rated shale shalo all aU dipping toward tt the tho J r. east ast Excavations have revealed the ther r presence of ot a a. well wall defined horizontal fault or or zone One striking dlag diagonally nallY across across' the pen open cut cut- Just to the south of or the new bridge thus shattering the tha top lop of ot the bedrock for tor a distance of ot off f r about feet alon along tho the direction o othe of the nt workings according to Dr P Pack ck He added ho however ever that limestone limestone limestone lime lime- stone bedrock is at present exposed almost almot from end to end of ot tho the open f f- cut Geologists Geologist's Report In tho opinion of the ge geologist lo ls th the tho fractures fracturE's zone detracts from the value of ot the site in two ways ways firstly firstly through f t the difficulty which will be encountered in hi making a permanently watertight water- water f 1 tight dam at the point through which l the shattered zone crosses it and sec sec- L' L x the completed structure would 4 never be considered as v safe as any movement along this zone Int in int t- t tho the future futuro might result seriously t through the breaking of the tho structure t In In commenting on Dr Packs Pack's i p c clams ms Mr Fortier says sas 11 L Taking up Dr DI Packs Pack's last objection first first In in regard the possibility of s movement in the future along th the tho fault tault line or zone zone zone-I I do not consider this in itself sufficient cause to condemn the site for the following reasons The dam under contemplation is to tobe be he of or earth supplemented by a R. concrete concrete concrete con con- crete core In such auch a tn type e of dam darn dependence must be placed upon the tho earth since many ninny structures of ot this kind have no masonry core core- walls core whatever what- what ever Considering the t type pe of dam that is to be used It would seem unIse uni un- un i j wise Ise to magnify unduly this small doir doI do- do I I 1 ir feet teet In the site because faults are aro aroI I more or less lees common In the formations I of or the Wasatch range and Ye yet vet notwithstanding notwithstanding notwithstanding not- not withstanding such irregularities it If is la regarded as affording reasonably s f j foundation for tor structures |
