13-06-007

Division 13-06-007
General Notes

Sections:

13-06-007-0002 Water and Sewer Notes (Water and Sewer Plans)

13-06-007-0003 Paving Notes (Paving Plans)

13-06-007-0001 General Notes

A. The following notes are to appear on applicable plans:

1. Approval of these plans by the City Engineer is for a one (1) year period, subsequent to the date of approval. If construction work is not started within the one (1) year period, or has been discontinued for any reason for longer than one (1) year, the plans shall be resubmitted for review and re-approval.

2. Plan review by the City does not extend to material quantities shown on the plans.

3. A public works permit, issued by the City, is required for all work in City rights-of-way or easements and for construction of any improvements intended to become public property.

4. The City shall be notified twenty-four (24) hours prior to beginning different phases of construction so that City Inspectors may be scheduled.

5. All materials and workmanship shall comply with Title 13, Engineering Design Standards and Specifications for New Infrastructure, current "MAG Uniform Standard Specifications and Details for Public Works Construction," the City of Flagstaff Stormwater Design Manual, and with generally accepted engineering design and construction practice. All work and materials, which do not conform to the standards and specifications, are subject to removal and replacement at the contractor’s expense. The contractor is responsible for reviewing Chapter 13-21, which makes minor modifications to certain MAG Specifications and details.

6. Any work performed without the knowledge and approval of the City Engineer or his authorized representative is subject to removal and replacement at the contractor’s expense.

7. The City Engineer or his authorized representative may suspend the work by written notice when, in his judgment, progress is unsatisfactory, work being done is unauthorized or defective, weather conditions are unsuitable, or there is danger to the public health or safety.

8. The City Engineer may order any or all materials used in the work to be tested according to the American Association of State Highway and Transportation Officials (AASHTO) and the American Society for Testing and Materials (ASTM) Standards. The Contractor shall, at his expense, supply all samples required for testing.

9. Access that meets Section 13-13-004-0001, Fire Access, shall be in place and approved before and at all times during on-site combustible construction and/or prior to issuance of building permits in new subdivisions. Fire Department and Engineering Section approval is required for obstruction of access or water system shutdown.

10. The contractor shall be responsible for maintenance of the streets and of partially completed portions of the work until final acceptance of the work. The contractor shall submit to the City Engineer for approval a construction schedule for any streets required to be closed or partially closed for the construction activity. The contractor shall reopen the streets no later than the opening date shown on the construction schedule or upon order of the City Engineer. The regulation and control of construction traffic shall be as directed by the City Engineer or his authorized representative.

11. Approval of a portion of the work in progress does not guarantee its final acceptance. Testing and evaluation may continue until written final acceptance of a complete workable unit. Any defects which appear in the work within one (1) year from the date of acceptance and which are due to improper workmanship or inferior materials supplied shall be corrected by or at the expense of the owner/developer or the contractor.

12. Acceptance of completed public improvements will not be given until defective or unauthorized work is removed, and final clean-up is complete.

13. Location of underground utilities before work is begun is to be accomplished in accordance with A.R.S. Section 40-360.22.

14. If work is done on private property in relation to a project constructed under these standards, the contractor will provide the City with written authorization from the property owner to do so.

15. The establishment and use of temporary construction yards shall conform to the current City zoning code standards for temporary uses.

16. All excavated material shall be disposed of in accordance with applicable City codes and regulations. The contractor shall obtain all required City approvals and permits as deemed necessary by the City to dispose of excavated material.

17. All construction staking shall be the responsibility of the contractor/developer and performed under the direct supervision of a registered land surveyor or civil engineer.

18. All traffic sign sheeting shall be Type VIII as designed by ASTM D4956-07e1 Standard Specifications for Retroreflective Sheeting for Traffic Control, unless specified otherwise on the construction plans.

19. When the construction plans specify graffiti control on bridges or other structures, the contractor shall seal the structure first using Monochem Aquaseal ME 12 and then apply Monochem Permashield, Sacrificial Graffiti Control System (or approved equal).

20. All areas disturbed during construction shall be stabilized and reseeded in accordance with Chapter 13-17. In the event that the construction activity disturbs more than one (1) acre, a stormwater pollution prevention plan (SWPPP) shall be prepared in order to obtain a construction general permit from ADEQ. (Ord. 2017-22, Rep&ReEn, 07/05/2017)

13-06-007-0002 Water and Sewer Notes (Water and Sewer Plans)

All design, construction, testing and inspection shall conform to the ADEQ requirements: water distribution in accordance with Bulletins 10 and 8, and sewer collection in accordance with AAC Title 18. In the event the ADEQ requirements conflict with these standards, the more restrictive shall apply.

A. Rough grading shall be completed within one-tenth (1/10) of a foot of plan grade and approved by the City Engineer’s authorized representatives prior to installation of underground utilities.

B. No trench shall be filled with bedding material or backfill until the excavation and pipe laying, respectively, have been approved by the City Engineer’s authorized representative.

C. A water pressure test is required of all water lines and a hydrostatic or air test is required of all sewer lines and manholes. Tests are to be conducted after backfilling is complete and compacted on all public and/or private underground utilities.

D. Water and sewer service lines are to be marked as shown on the standard service details.

E. Water line disinfection is to be accomplished as outlined in Arizona Department of Environmental Quality (ADEQ) "Bulletin No. 8."

F. Water pipe classification shall be Class 305 for A.W.W.A. C-900 PVC and Class 350 for ductile iron unless otherwise approved by the City Engineer. C-900 shall conform to cast-iron-equivalent outside diameter and have elastromeric gaskets and couplings. All ductile iron pipe shall be polyethylene encased in accordance with MAG Specifications.

G. All materials that come into contact with drinking water shall conform to NSF Standard 61 including, but not limited to, gaskets, lubricants, pipe fittings, and valves (NSF-pw seal) (R18-4-119B).

H. All public sanitary sewer lines and private sewer service lines within a public utility easement or right-of-way will be inspected prior to acceptance by the City.

I. Water and sewer mains shall be separated in order to protect public water systems from possible contamination. All distances are measured perpendicularly from the outside of the sewer main to the outside of the water main. Separation requirements are as follows:

1. A water main shall not be placed:

a. Within six (6) feet, horizontal distance, and less than two (2) feet, vertical distance, above the top of a sewer main unless extra protection is provided. Extra protection shall consist of constructing the sewer main with mechanical joint ductile iron pipe or with slip-joint ductile iron pipe if joint restraint is provided. Alternate extra protection shall consist of encasing both the water and sewer mains in at least six (6) inches of concrete for at least ten (10) feet beyond the area covered by this subsection.

b. Within two (2) feet horizontally and two (2) feet below the sewer main. When a water main is placed below a sewer main, extra protection is always required regardless of the vertical separation.

2. No water pipe shall pass through or come into contact with any part of a sewer manhole. The minimum horizontal separation between water mains and manholes shall be six (6) feet, measured from the center of the manhole.

3. The minimum separation between force mains or pressure sewers and water mains shall be two (2) feet vertically and six (6) feet horizontally under all conditions. Where a sewer force main crosses above or less than six (6) feet below a water line, the sewer mains shall be encased in at least six (6) inches of concrete or constructed using mechanical joint ductile iron pipe for ten (10) feet on either side of the water main.

4. Even when extra protection is utilized, the minimum clearance between water and sewer shall be one (1) foot.

5. The separation requirements do not apply to building, plumbing, or individual house service connections.

J. When hydrostatic testing is performed, sewer lines shall be tested for infiltration/exfiltration in accordance with ADEQ Engineering Bulletin No. 11. Manholes shall be tested by filling the manhole with water. The applicant shall ensure that the drop in water level does not exceed one-thousandth (0.001) of the total manhole volume in one (1) hour.

When air testing is performed, sewer lines shall be tested in accordance with ASTM F1417-92. Manholes shall be tested in accordance with ASTM C1244.

K. Sewer pipe shall be SDR 35, ASTM D3034 for PVC pipe, or Class 150 DIP lined with Protecto 401 ceramic epoxy or HDPE ASTM F894. All ductile iron pipelines shall be polyethylene encased in accordance with MAG Specifications. Special design considerations may require a higher class rating of DIP.

L. No water settling of trench fill material is allowed.

M. All water and sewer design and construction shall conform to the current Arizona Department of Environmental Quality (ADEQ) requirements. When ADEQ requirements are in conflict with these standards, the more restrictive shall apply.

N Tracer wires and tapes shall be installed prior to testing the water or sewer main as required by Section 13-09-001-0002. (Strip wire two (2) inches at termination of the service.)

O. Water valves shall be adjusted in accordance with City of Flagstaff Engineering Detail No. 9-03-060 and manholes shall be adjusted in accordance with City of Flagstaff Engineering Detail No. 9-03-062.

P. One hundred percent (100%) of the sewer line shall be tested for uniform slope by remote camera and tested for short-term deflection.

1. When a sewer service is required to be abandoned, it shall be abandoned at the property line and capped using the appropriate materials (PVC, clay, or concrete).

2. When an existing water service is required to be abandoned, it shall be abandoned at the main. The saddle and corp. stop shall be removed and the main clamped with an approved full circle repair clamp.

Q. The location of water services shall be identified by branding a "W" on the top or face of curb.

R. Sewer service locations shall be identified by branding an "S" on the top or face of the curb. (Ord. 2017-22, Rep&ReEn, 07/05/2017)

13-06-007-0003 Paving Notes (Paving Plans)

A. Exact point of matching termination and overlay, if necessary, shall be determined in the field by the City Engineer or his authorized representative. When a longitudinal joint associated with a trench path, pavement matchup or other occurs on a street that includes a bike lane, the joint shall be located outside the bike lane.

B. No job will be considered complete until:

1. All curbs, pavements, sidewalks, catch basins, storm drains, and manholes have been cleaned of all dirt and debris;

2. Survey monuments are installed and stamped; and

3. All frames, covers, and valve boxes are adjusted to grade.

C. No paving construction shall be started until all utility lines are completed and approved under proposed paved areas.

D. Base course will not be placed until subgrade has been approved by the City Engineer or his authorized representative.

E. The location of all water valves, fire hydrants, and manholes must at all times during construction be referenced and made accessible to the City.

F. Utility facilities in conflict with this work will be relocated by the permittee or the utility owner. This activity shall be coordinated with the owner of the utility to prevent any unnecessary interruption of service to existing customers.

G. Existing street name signs, traffic signs and devices associated with the project shall be maintained during construction and relocated by the contractor as shown on the approved plans.

H. Any changes or additions to pavement markings caused by pavement overlay, chip seal, or installation of underground facilities shall be shown on the approved plans.

I. On projects where the contractor causes excessive damage to an existing paved street or there are multiple street cuts (maximum of four (4) in five hundred (500) feet) an asphalt overlay shall be required.

J. A prime coat is not required unless so specified in the soils and pavement report and/or shown on the plans.

K. All curb and gutter, sidewalk, driveways, and sidewalk ramps shall be constructed on a minimum three (3) inches of aggregate base course (ABC). The ABC shall be constructed in accordance with MAG Section 310, and shall be compacted to ninety-five percent (95%) relative density. All precast structures such as manhole bases, catch basins, and box culverts shall be constructed on a minimum of three (3) inches of ABC.

L. Permanent Pavement Markings.

1. Longitudinal pavement markings shall be installed in accordance with Section 13-16-006-0001.

2. Transverse pavement markings such as stop bars, crosswalks, arrows, and legends shall be installed in accordance with Section 13-16-006-0002.

M. Temporary Pavement Markings.

1. Temporary pavement markings, when approved, shall be installed in accordance with Sections 13-16-006-0001 and 13-16-006-0002.

NOTES:

1. The use of temporary markings is strongly discouraged and may only be used with prior approval.

When it is used, the contractor must be available to restripe as needed until the permanent markings can be installed.

2. When it is impracticable for the contractor to provide permanent markings, the City Public Works Department may install the markings on behalf of the contract provided the fee for the work is agreed upon and paid for in advance.

N. The maximum thickness of a single lift of pavement shall be four (4) inches. (Ord. 2017-22, Rep&ReEn, 07/05/2017)

13-06-007-0004 Landscaping Notes

Adjacent site improvements, pavement construction, irrigation installation and finish grading shall be completed prior to planting work. Do not plant when conditions are not suitable for digging, mixing, raking and/or grading. Planting needs to occur during the months that irrigation systems are in operation. Therefore, planting may occur between April 1st and September 30th.

A. Tree and Shrub Installation.

1. Soil excavated from the planting pit shall be typically considered acceptable as backfill material for planting.

2. All containers shall be removed prior to plant installation in a manner that does not disturb the potted soil or root ball.

3. Set the root ball on six (6) inches of firm planting soil, plumb and in the center of the pit with the root ball crown slightly above the same elevation as adjacent finished landscape grades. Remove any wire, twine, burlap, or other material from the upper one-third (1/3) of the root ball of balled and burlapped stock. Wire baskets and synthetic burlap shall be completely removed after the root ball has been placed in its final location.

4. Once plant is set, place backfill material around base and sides of root ball and work each layer to settle backfill and eliminate voids. When backfilling is two-thirds (2/3) complete, water thoroughly. Place the remainder of the backfill and repeat watering until no more is absorbed. Place the final layer of backfill and water.

5. All deciduous trees shall be wrapped from the ground line up to and including the first primary crotch formed by the first major branch. Wrapping shall be done after the plant has been installed.

6. Two (2) to three (3) inches of specified mulch shall be placed in the area disturbed by excavation of the planting well.

B. Ground Cover Installation.

1. Prior to planting activities, completely remove existing weeds, including roots. Immediately prior to installation, cultivate ground cover areas to a depth of six (6) inches and grade smoothly and uniformly. Plant ground cover so the root crown is at or slightly above the bed’s finish grade. After planting of ground cover and prior to mulching, spread pre-emergent weed control over planting bed soil surface in accordance with manufacturer’s written directions. Install the specified mulch to a depth of two (2) inches over the entire ground cover bed.

C. Landscape Completion.

1. Prune dead or damaged branches, making all cuts at branch collar. Maintain the natural habit, shape and specified size. Remove all tags, labels, and other material. (Ord. 2017-22, Rep&ReEn, 07/05/2017)