Construction of the Replacement Fort Garry-St. Vital Siphons

D4.          SCOPE OF WORK
D4.1        The Work to be done under the Contract shall consist of a new sewer river crossing

(siphon) under the Red River that is approximately 380 m in length consisting of a 2100 mm primary

casing pipe and two (2) 900 mm carrier pipes pulled through on casing spacers, 1350 mm connection

trunks to the existing trunk system, modifications to existing subterranean structures and all

required Work associated with the installation of the above.
D4.2        The major components of the Work are as follows:

(a)      Demolition of the existing cast-in-place discharge chamber from the D’Arcy Waste Water Pumping Station

(b)      Installation of new cast-in-place discharge chamber receiving flows from the D’Arcy Lift Station 500 mm AC force main conveys flow to the siphon system.

(i)     Cast in place concrete structure, fitted with a weir to the gravity overflow.

(ii)     Installation of new flap gates to the four (4) overflow cross connections.

(c)      Rehabilitation of the existing 1350 mm gravity sewer and outfall, which will be used as the gravity overflow of the new FGSV siphon crossing.

(i)     1350 mm reinforced concrete pipe (RCP) gravity sewer will be rehabilitated by CIPP methods.

(d)      Temporary relocation of Active Transportation paths.

(e)      Trenchless installation of approximately 70 m long 1350 mm RCP connecting the new discharge chamber to the upstream siphon chamber crossing Abinojii Mikanah.

(f)       Installation of MTBM launch and receiving shafts.

(g)      Installation of approximately 350 long river crossing (siphon) using Microtunneling:

(i)     2100 mm internal diameter primary casing pipe through underlying limestone bedrock strata.

(ii)     Two (2) 900 mm DR 11 HDPE carrier pipe to be pulled through casing pipe on casing spacers.

(h)      Trenchless installation of approximately 70 m long 1350 mm RCP connecting the new downstream siphon chamber to the connection manhole at the St. Vital Trunk.

(i)       Conversion of the launch and receiving shafts into final chamber configuration.

(i)     Installation of chamber foundation and walls (if not part of construction shafts).

(ii)     Installation of permanent roof and service access projection to grade.

(iii)     Installation of intermediate floor(s), ladders, lighting, and other man-entry accommodations.

(j)       Installation of chamber appurtenances.

(k)      Site restoration works and new Land Drainage Sewers.

D4.3        The funds available for this Contract are $20,100,000.00. D4.4        The following shall apply to the Work:

(a)   City of Winnipeg Green Building Policy: New City-Owned Buildings and major additions; http://clkapps.winnipeg.ca/DMIS/DocExt/ViewDoc.asp?DocumentTypeId=2&DocId=5989

(b)   Universal Design Policy http://clkapps.winnipeg.ca/DMIS/DocExt/ViewDoc.asp?DocumentTypeId=2&DocId=3604

Bidding and Documents are available on http://www.merx.com . Fees may apply; See https://www.merx.com/public/pricing for more information.

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