ENGINEERING COMPANY - Maricopaapps.fcd.maricopa.gov/pub/docs/scanfcdlibrary/A025...7 Pavement...
Transcript of ENGINEERING COMPANY - Maricopaapps.fcd.maricopa.gov/pub/docs/scanfcdlibrary/A025...7 Pavement...
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CITY OF PEORIAENGINEERING DIVISION
PROJECT S-9403 - NORTHERN AVENUE21-INCH SANITARY SEWER
87TH AVENUE - 12-INCH SANITARY SEWER
ALIGNMENT STUDYIDESIGN REPORT
OCTOBER 1994
Prepared by:SFC ENGINEERING COMPANY
7776 Pointe Parkway WestSuite 290
Phoenix, AZ 85044
,., ,....
AM,mb"'f th, ~~ ~ •Stanley Technology Group A...j
A025.601--------------------- ENGINEERING COMPANY
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CITY OF PEORIAENGINEERING DIVISION
PROJECT S-9403 - NORTHERN AVENUE21-INCH SANITARY SEWER
87TH AVENUE - 12-INCH SANITARY SEWER
ALIGNMENT STUDYIDESIGN REPORT
OCTOBER 1994
Prepared by:SFC ENGINEERING COMPANY
7776 Pointe Parkway WestSuite 290
Phoenix, AZ 85044
ALIGNMENT STUDYIDESIGN REPORT
Basis for Design
Scope of Work
Project Description - S-9403
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• Field investigation
OCTOBER 1994
The following functions were performed prior to preparation of the design report:
The intent of the report is to identify existing utilities and to determine available "corridor(s)"
suitable for construction of the sanitary sewer line. The sewer line route selection shall be
coordinated with two other major utilities; a 60-inch to 72-inch storm drain being planned by
the Flood Control District of Maricopa County and a 12-inch water line designed by the City
of Glendale. In addition to the sewer line alignment, the study proposes interconnection points
(manholes) to the existing sanitary sewers in 91st and 83rd Avenues. Determination of the
horizontal and vertical alignments will serve as a basis for the development of probable
construction costs. The alignment study and design report is supported by photographic
documentation taken during the initial site investigation.
The project includes the design and post-design services for the construction of a 21-inch
sanitary sewer on Northern Avenue from 83rd Avenue to 91st Avenue and design services for
a 12-inch sanitary sewer on 87th Avenue from Olive Avenue to Monroe Street. This study
covers the 21-inch sanitary sewer on Northern Avenue only in order to expedite the project
coordination with other agencies and the alignment approval. A similar study for the 87th
Avenue sanitary sewer will be submitted separately.
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Alignment Study
The proposed utility locations shown on the attached cross-sections meet the above goals. The
proposed utilities will be located as follows:
The proposed 7 foot separation between the sanitary sewer and the stonn drain exceeds
minimum requirements recommended by the MAG standards. In case the storm drain diameter
exceeds 6 feet, the separation could be increased to 8 feet without causing problems or additional
2OCTOBER 1994
• Minimize the number of changes to the already designed Glendale water line
• Locate the sanitary sewer line to allow for connections from the north
• Provide a suitable corridor for construction of the large diameter storm drain
• The proposed sanitary sewer will be located 7 feet north of the monument line
• The stonn drain will be located approximately on the monument line
• The proposed 12-inch water line will require minimum adjustments to accommodate the
storm drain and sanitary sewer
Using prepared base sheets, cross-sections were developed (in critical points) to determine
available corridors that would accommodate the sanitary sewer, storm drain and water line.
After determination of the available space, several utility locations were evaluated in order to:
• Collection of as-builts and utility records
• Review of plans for the proposed 12-inch water line
• Review of the conceptual storm drain design (size, scope)
• Site survey following existing utility "blue stake"
• Preparation of base sheets in 1" =20' scale, including utility locations, based on available
records and survey
• Proposed list of field utility locations (potholing)
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Opinion of Probable Construction Costs
The opinion was developed using City of Phoenix and Scottsdale indicators (bid results, etc.)
and Richardson's "General Construction Estimating Standards."
relocations. The proposed separation is sufficient to construct the stonn drain without
"endangering" the sewer line. "Swapping" the sewer and drain line locations was also
considered, but it was then discovered that the stonn drain would "screen" the sanitary sewer,
blocking any new connections from the north due to its size. The proposed arrangement allows
for connections to both the sanitary and storm drain lines throughout most of the project's
length.
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OCTOBER 1994 3
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PROJECT 8·940321·INCH SANITARY SEWER ON NORTHERN AVENUEOPINION OF PROBABLE CONSTRUCTION COSTS
OCTOBER 1994SFC NO. 1610701
ITEM UNIT AMOUNTNO. DESCRIPTION UNIT QUANTITY PRICE
1 Mobilization LS 1 $21,400.00 $21,400.00
2 Pavement Removal (Sawcut) SY 2,890 $2.20 $6,358.00
3 Sewer Line Excavation CY 13,481 $6.50 $87,626.50
4 Sewer Line Installation LF 5,175 $45.00 $232,875.00
5 Sewer Line Backfill (Native) CY 11,555 $4.50 $51,997.50
6 Sewer Line Backfill (ABC) CY 1,926 $15.00 $28,890.00
7 Pavement Replacement Type A SY 2,890 $6.50 $18,785.00
8 MH Installation (5-ft dia.) EA 10 $7,500.00 $75,000.00
9 Existing Line Interconnection EA 3 $4,200.00 $12,600.00
10 Project Close-out (Demobilization) LS 1 $20,000.00 $20,000.00
SUBTOTAL $555,532.00
INCIDENTAL COSTS @ 10% $55,553.20
CONTINGENCY @ 15% $83,329.80
TOTAL $694,415.00
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ALIGNMENT
PHOTOGRAPH'S
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Northern Avenue at 91st Avenue Looking Northwest
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Northern Avenue at 91st Avenue- South Side Looking West
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Northern Avenue at 91st Avenue- Looking East
Northern Avenue at 89th Lane- Looking East
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Northern Avenue at 89th Avenue Looking East
IINorthern Avenue Looking East
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Northern Avenue Looking East
IIIrrigation Structure at 87th Avenue Alignment- North Side
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Irrigation Structure- North Side Looking East
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Irrigation Structure- South Side Looking North
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Northern Avenue Looking East- North Side
Northern Avenue Looking East
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Northern Avenue & 83rd Avenue- Looking East
Northern Avenue & 83rd Avenue- Looking Northeast
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83RD AVENUE TO giST AVENUE
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SUite 290Phoenix. Arizona 85044
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