10 Mile Stor-it Plans 8-8-17CITY OF MERIDIAN GENERAL CONSTRUCTION NOTES
1.All construction work shall be done in accordance with the current version of the Idaho Standards for Public Works
Construction (ISPWC), the City of Meridian Supplemental Specifications to the ISPWC, the requirements of the Ada County
Highway District (ACHD) and/or the requirements of the Idaho Transportation Department (ITD). The more stringent of any of
these standards shall be the controlling standards or specifications.
2.All Contractors, Subcontractors and Utility Contractors shall be required to attend an on-site meeting prior to start of work.
3.Contractors shall notify the appropriate agency when materials are on site or inspection of the work is required. No work
may begin on any project without Twenty Four (24) hour prior notice.
4.All material furnished on the project must meet the minimum requirements of the approving agencies. At the request of
the approving agency or the Design Engineer, Contractors shall furnish proof that all materials installed on this project meet the
specification requirements set forth in General Construction Note No. 1.
5.Work subject to approval by any governmental agency must be approved prior to (A) backfilling trenches for pipe; (B)
placing of aggregate base; (C) placing of concrete; (D) placing of asphalt paving.
6.Inspection, approval and final acceptance of all water and sewer construction shall be by the Public Works Department,
and their decision shall be final. Such inspections shall not relieve the contractor from the responsibility of performing the work in
an acceptable manner in accordance with the DEQ/QLPE approved construction plans.
7.Any deviation from the approved plans and specifications must have the applicable agency approval in writing prior to
construction.
8.Prior to beginning installation of street lights, the electrical contractor shall obtain an Electrical Permit from the Building
Division of the Meridian Public Works Department. Any deviation in street light locations from the approved plans must be
approved in writing from the City Engineer.
ROADWAY
1.All Contractors working within the public road right-of-way are required to secure a right-of-way construction permit from
ACHD or ITD at least twenty-four (24) hours prior to any construction.
2.ACHD or ITD will inspect all work within the public rights-of-way and utility trenches above the pipe zone.
3.Meridian Public Works will inspect storm drainage improvements serving private roads, parking lots and other paving
improvements outside the public right-of-way.
WATER
1.Construction of the water system shall conform to the standards in the Idaho Rules for Public Drinking Water Systems
(IDAPA 58.01.08) as well as the standards and specifications referred to in General Construction Note No. 1.
2.The horizontal separation of non-potable services and potable water services or potable water mains shall be a minimum
of six (6) feet. Where it is necessary for a potable water main and non-potable water main to cross with less than eighteen (18)
inches of vertical separation, the crossing shall be constructed in accordance with Section 542.07 of the Idaho Rules for Public
Drinking Water Systems (IDAPA 58.01.08) and Section 430.02 of the Wastewater Rules (IDAPA 58.01.16).
3.Place water service lines in a two (2) inch diameter pipe wherever the service line crosses a storm water treatment
facility (i.e. seepage beds, drainage swales). The pipe material used for sleeving must be impervious to contamination from
petroleum products and must be approved by the Idaho Department of Environmental Quality.
4.The Contractor shall be responsible for providing continuous water service to all existing water users affected by
construction.
5.All water works components shall be ANSI/NSF 61 Certified, and must meet all AWWA and standard requirements of the
Idaho Rules for Public Drinking Water Systems (IDAPA 58.01.08).
SEWER
1.Construction of the sewer system shall conform to the standards in the Wastewater Rules (IDAPA 58.01.16) as well as
the standards and specifications referred to in General Construction Note No. 1.
2.The horizontal separation of non-potable services and potable water services or potable water mains shall be a minimum
of six (6) feet. Where it is necessary for a potable water main and non-potable water main to cross with less than eighteen (18)
inches of vertical separation, the crossing shall be constructed in accordance with Section 542.07 of the Idaho Rules for Public
Drinking Water Systems (IDAPA 58.01.08) and Section 430.02 of the Wastewater Rules (IDAPA 58.01.16).
3.Place sewer service lines in a six (6) inch diameter water class pipe wherever the service line crosses a stormwater
treatment facility (i.e., seepage beds, drainage swales).
4.When cover over a sewer pipe is less than three (3) feet from top of pipe to subgrade or top of pipe to natural ground, use
"Class 200 water pressure pipe", ASTM D 2241, SDR 21, including service lines and fittings.
PRESSURIZED IRRIGATION
1.Install all crossings of the Public Rights-of-Way, private roadways and travelways with pressure irrigation at a maximum
depth of two-and one-half (2-1/2) feet and in an AWWA C-900 pipe sleeve with locator wire. The Public Works Department and
ACHD shall inspect all crossings prior to backfilling.
2.The horizontal separation of non-potable services and potable water services or potable water mains shall be a minimum
of six (6) feet. Where it is necessary for a potable water main and non-potable water main to cross with less than eighteen (18)
inches of vertical separation, the crossing shall be constructed in accordance with Section 542.07 of the Idaho Rules for Public
Drinking Water Systems (IDAPA 58.01.08) and Section 430.02 of the Wastewater Rules (IDAPA 58.01.16).
3.Install finder tape with all irrigation mains. Tape shall be two (2) inches wide, metallic red in color, with the words
DANGER -UNSAFE WATER or NON-POTABLE WATER clearly marked along its length. Place the tape between six (6) inches
below the surface and eighteen (18) inches above the top of the pipe.
4.Label all irrigation risers and faucets with durable tags carrying the warning DANGER-UNSAFE WATER or
NON-POTABLE WATER.
5.Label all valve boxes and vaults with durable tags carrying the warning DANGER-UNSAFE WATER or NON-POTABLE
WATER. The valves and boxes are to be located a minimum of ten (10) feet outside of the Public Right-of-Way, private
roadways and travelways.
6.Install a reduced pressure backflow preventer in any connection between the potable water system and the pressure
irrigation system. The device must be approved by the Idaho Department of Environmental Quality (DEQ) and the City of
Meridian Water Department.
7.The Public Works Department shall inspect all pressurized irrigation unless a properly executed agreement for inspection
and maintenance is in effect with the applicable Irrigation District. Forty-eight hours advance notice is required.
DRAINAGE
1.The Contractor shall have plans stamped “Approved for Construction” by City of Meridian Public Works Department on
site at all times.
2.Any change from the plans shall be approved by the designer and the City of Meridian Public Works Department.
3.The Contractor shall contact the City of Meridian Public Works Department for inspection of all storm water facilities prior
to the placement of filter fabric. Minimum 24-hour notice is required. Approval is contingent upon inspection.
4.Use one of the following notes depending on whether a Soils Report is submitted to Public Works Without a Soils or
Geotechnical Report:
4a. The Contractor shall excavate a minimum of one test hole to determine if impermeable layers or groundwater exist within 4
feet of proposed bottom of drainage facility. Contact the Engineer for revised beds if either condition is found. Contact
Meridian Public Works for inspection of test hole prior to backfill.
With a Soils or Geotechnical Report:
4b. Separation from the bottom of the drainage facility to seasonal high groundwater shall be a minimum of 3'. Contact
Engineer for revised drainage facility design if bottom of facility is within 3' of seasonal high groundwater elevation.
Re-designed facility shall be approved by the Public Works Department.
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STRUCTURE # GRATE I.E OUT I.E. IN DESC.
1 46.80 18" I.E.
2 49.50 47.00 47.20 S.V.
3 49.70 47.40 47.50 M.H.
4 50.10 48.00 48.10 M.H.
5 50.50 48.50 48.60 M.H.
6 51.10 49.00 C.B.
7 51.10 49.10 C.B.
8 51.20 49.20 C.B.
9 51.50 49.50 C.B.
10 47.30 18" I.E.
11 50.90 47.50 47.60 S.V.
12 51.20 47.90 48.00 C.B.
13 51.50 48.40 48.50 C.B.
14 52.30 49.70 49.80 C.B.
15 53.10 51.10 C.B.
16 52.10 49.60 49.70 C.B.
17 53.00 51.00 C.B.
18 51.83 48.90 49.00 C.B.
19 52.76 50.40 C.B.
20 51.50 48.00 48.10 C.B.
21 52.30 49.40 49.50 C.B.
22 53.10 50.80 C.B.
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SPOT ELEVATION ABBREVIATION KEY
AC = FINISH ASPHALT
TC = TOP OF CONCRETE
FL = FLOW LINE VALLEY GUTTER
8" COMPACTED SUB-GRADE
4" OF 3/4 MINUS BASE COURSE
0.50" R
1.00'
1.5"
CONCRETE
9.5" THICK
2.00'
2.5" THICKNESS OF ASPHALT PLANT MIX PAVEMENT
4" THICKNESS OF 3
4 " MINUS CRUSHED AGGREGATE BASE
COMPACTED TO 95% MAX DRY DENSITY PER ASTM D1557
11" THICKNESS OF 6" MINUS UNCRUSHED AGGREGATE SUB BASE
COMPACTED TO 95% MAX DRY DENSITY PER ASTM D1557
APPROVED ON SITE STRUCTURAL FILL AS REQUIRED
COMPACTED TO 95% MAX DRY DENSITY PER ASTM D1557
SUBGRADE SHALL BE PREPAIRED AND PROFF COMPACTED BY THE
OWNERS REPRESENATIVE PRIOR TO PLACEMENT OF ANY
SUBBASE AGGREGATE OR STRUCTURAL FILL
ASPHALT PAVEMENT SECTIONVALLEY GUTTER SECTION
DRAINAGE POND/SEEPAGE TRENCH (TYP)
NTS
AREA 1
3
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SLOPE
SEDIMENT BOX
1000 GAL.
VALLEY GUTTER
5.00'
PL
12" ASTM C33 FILTER SANDEXTEND AT LEAST 1' INTO
FREE-DRAINING MATERIAL.
12" MINUS COBBLE AT ALL OUTFLOWS
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