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294
<br />Tuesday, Yarch 82n&., 1927.
<br />eraph effe Co.
<br />J , permission to plate three poles on Laurel street .between Vashihgtan and
<br />rson Street.
<br />City Engineer, Mr. H. G. Wray, submitted. the tab-alatioiis'of bids
<br />on the Northwest Trunk Sewer Improvement under Improvement Resolution No1774, Mr.
<br />Wray's tabulation and analysis of bids on this improvement Is given in the following
<br />letter addressed to the 'Board:
<br />?Boa r of Public Works
<br />City Hall,
<br />BeW, Indiana.
<br />Gentlemen:
<br />I submit, herewith, for your fonsideration a tabulation and analysis
<br />of bids received for the construction of the North-west Trunk Sewers'
<br />It may be pertinent to remark that I believe the City to be fortunate
<br />in having received rather exceptionally low bids. This is due in part, no doubt, to
<br />our having been able to invite bids very early before the contractors had other work 1
<br />on their hands for the season.
<br />Our estimate for the construction of this sewer, while being a maximum,,,
<br />figure, was nevertheless estimated closely and conservatively. The two lowest bids
<br />are more than $250,000,00 below this estimate.
<br />The `bid of Gedneh and Son's'Company, -being legally defedtive and reject
<br />ed upon the advise of the City Attorney, and subsequently withdrawn by such contragtor,
<br />is not listed in the tabulation. Such bid, however, for Precast Concrete amounted,
<br />without liner plane, to $Is388,809,47, and with plates to $I,453*,6IJ.831,,
<br />The- bids- as carefully checked and tabulated are as follows:
<br />'.;Pteyast Concrete Pipe
<br />Contractor Amt of bid without plates Amt. of bid with _plates,
<br />Byrne Bros. gt5009000,00 I0665t839,88
<br />J. J. Dunnegan Co. 2v4259466.15 Iv55JO85J.25
<br />MONOLITHIC CONCRETE
<br />Byrne Bros, IV6I7vOI0.46 lf,746,,I23,49
<br />Ind, Tunnel Const, Co 1*420,340.06 IF457w626.I4
<br />BRICK
<br />Byrne Bros. Ir625jI53,06
<br />Alternate bids were received for the use of vitrified liner plates,
<br />for both the Monolithic Concrete and 2raftgt Concrete Types of construction. Such
<br />plates.have never been used in South Bend;-r-andiwhjle offering a superior feature in
<br />sewer construction, it is open to question whether the advantages accruing from their'
<br />use are sufficient to justify the extra cost considering that the'Northwest Sewer
<br />district is, at the present time, essentially residential and that liner plates are
<br />only used as a safeguard against the acid action of industrial waftes. A principle
<br />fI argument against them for this sewer is that the bids for their use 'run trery much
<br />bAgher that we had estimated in our figures. Accordingly, it is my opinion that
<br />liner plates are not necessary or -argent for this sewer* In what follows, I am dis-
<br />cussing the bids without plates.
<br />Two contractors have submitted bids for the Monolithic Concrete Type
<br />of construction. The difference between the two bids amounts to $196,670.40.
<br />Of these two contractors, Byrne Bros., who submit the higher bid of
<br />$Ij617,010.46, specify and bid upon the Monolithic Reenforced Concrete and the open cut',
<br />method of construction according to the city's specifications.
<br />The Indiana Tunnel Construction Company submitting a Nonoltthic Concrete
<br />bid in the amount of $1,420,340. i 06 spefifies plain or un-reenforced concrete and the
<br />bid is offered conditionally. '.heir specifications provide that it is'Tunderstood that
<br />the contractor is given the right and option to employ either the tunnel or open cut
<br />method of construction*"
<br />The City's printed form of spud-iftmations in use for a number of years
<br />past, under the heading of Excavation, contains the following provision:
<br />"S. No tunneling will be allowed unless i# the opifiii)% of the Vngineer
<br />it may be necessary in order to pass under street railroads, pipes or other obstructions
<br />to open cut. No tunneling shall be done except by his written order."
<br />In addition to the printed ppedifications- the City's typewritten
<br />portion of the specifications contains the additional provision that exca*ati on shall
<br />be op'en by out.
<br />There are recognized objections to a tunneling process of excavation,
<br />and especially is that true in view of the particular ground. conditions that will be
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