Construction Sequence
This is a typical sequence of construction activities that takes place over the life of a project. Not all projects will have all phases and may not follow this sequence exactly.
All construction in the Town requires the following:
- Each contractor must have a permit for the job.
- Any work that is performed on the weekend requires a Town inspector on the site. The contractor/developer will be required to pay the overtime fees for that inspector. You must call in to (480) 503-6728 by no later than noon on Thursday, to schedule an inspector for the weekend.
- An approved set of plans must be on-site at all times.
- Working in the street requires a traffic control plan.
- Fire hydrant meters shall be used to meter all water.
- An Approval of Construction is required from Maricopa County for all finals on projects.
Grading Inspections performed:
- Dust control (permit from the county is required).
- Existing streets shall be kept clean.
- Haul route and a haul permit are required if material will be imported or exported.
- Track-out rock is in place on entrance.
- SWPP plan is in place.
- Check spoils pile for at least 10 feet (depth) of permeable material
- Check depth of drywell
- Make sure that drywell is per plan (settling chamber depth)
- Drainage pipe bedding per plan
- A copy of the drilling log is required
Sewer Inspections Performed:
- Inspect trench for pipe bedding (3/8" minus pea gravel). Bedding shall be a minimum of 4" deep.
- Inspect pipe for correct depth, alignment, and grade. No bends are allowed except at the wye
- Shading of the pipe shall be 6" over the top of pipe with 3/8” minus pea gravel.
- Verify each service and pipe shading. No wyes or services will be allowed in the manhole.
- Inspect manhole bases before they are poured. Ground must be clean and undisturbed or compacted native. Insure proper depth and that water stops are installed on the pipe.
- Manhole concrete shall be MAG class A. A chute is required if the manhole is 8’ or deeper. Each manhole must be grouted between adjusting rings.
- Test line after 20 days in-ground. All sewer line must be camera inspected. Mandrel 100% of the length and air test 100% before acceptance. Testing will not begin until after dry utilities have been installed and backfilled.
- Compaction tests on trench backfill (main line and services).
- Check that green-painted wood 2x4's are installed for the service at each lot.
- Inspect trench for pipe bedding (3/8" minus pea gravel)
- Pipe shall be shaded to the springline of pipe with 3/8” minus pea gravel.
- Inspect pipe and verify all valves, tees, services, etc. Also check every saddle, corp stop, copper, and angle stop. Copper must not be kinked when bent. Type L hard copper is required when the service is 1-1/4 inch or larger.
- All valves and hydrants must be approved by the Town.
- Hydrant valves must be flanged to the tee/90 and the line must be ductile iron pipe (DIP) from the valve to the hydrant.
- Inspect Mega-Lugs at each fitting and joint restraints at each bell prior to shading pipe. Thrust blocks are used only at tapping sleeves.
- Compaction tests on trench backfill (main line and services).
- Pressure test the water line at 125% of rated pressure (typically 187.5 psi). Tapping sleeves must be stainless steel and will be tested at 200 psi.
- Chlorine test.
- Bacteria test.
- Check that blue-painted wood 2x4's are installed for the service at each lot.
- Ensure that all water flushed from the system is metered.
- Water meter boxes will be installed after concrete work is completed. Boxes shall be parallel to the sidewalk/curb and shall be placed 2" above the sidewalk grade to allow for landscaping. Angle stops are to be no more than 10" below top of meter box.
Dry Utilities Inspections are to be done by each utility company. All trenches should be inspected prior to backfill to check for damage to any Town utilities (water & sewer lines & services) and for clearance around our pipe.
- Compaction test on trench backfill.
Concrete inspections includes curb and gutter, sidewalk, catch basins, scuppers, aprons, driveways, and valley gutters. Concrete construction shall not begin until utilities (water, sewer, and dry utilities) are complete and accepted. Inspections Performed:
- Daily compaction tests (make sure lab pulls cylinders). Compaction tests are required 24 hours prior to pouring concrete.
- Physically check subgrade for moisture and density
- Periodically check mixer truck tickets for old concrete. Concrete must not be over 90 minutes old, nor over 90 degrees in temperature. Concrete that is out of spec shall be sent off the job immediately.
- All concrete shall be cured with a WHITE curing compound.
- Catch basins, scuppers, and headwalls will be inspected before pouring.
Street Roadway construction includes rough and fine grading of subgrade (SG), aggregate base course (AB/ABC) placement and fine grading, placement of asphalt concrete (AC), and utility adjustments (manholes, water valves, etc. raised to grade). Inspections Performed:
- Compaction tests on subgrade
- Proof roll (18,000 psf minimum) and stringline subgrade. Subgrade tolerance is ½ inch.
- Compaction tests on ABC.
- Proof roll (18,000 psf minimum) and stringline ABC. ABC tolerance is ¼ inch.
- Asphalt is to be an EVAC approved mix. Residential and collector streets are (1) lift, two and one half inches (2-1/2”) thick of R19 mm EVAC approved mix. Arterial streets are (2) lifts, with the base course being two and one half inches (2-1/2”) of A-19 mm EVAC approved mix and the seal course being one and one half inches (1-1/2”) of A-12.5 mm EVAC approved mix.
- Check manhole and valve adjustments. All concrete used for adjustments shall be MAG “A” concrete.
- Seal course of AC: lab must get samples for density and oil content. Mix must be EVAC approved.
- Contact Traffic Engineering Inspector prior to signing and striping layout.
Street Light inspections consist of inspecting everything from the j-box to the street light.
- Direct buried lights shall be per plan with compacted ABC backfill around the light pole. Arterial street lights are required to have pole foundations per plan. Inspect the depth of the hole, the steel, conduit and concrete. Poles on foundations shall not be set for a minimum 72 hours after foundation has been poured,
- Inspect ground rods, wiring and fuses in the j-box. Inspect the wiring and ground connections in the pole hand-hole.
- Make sure the lamp is installed and a cap is on the pole. Wattage sticker also needs to be placed on the ballast.
- After all inspections have passed, a Letter of Authorization (LOA) shall be sent to Albert with the SRP KE# on the letter.
- A 48 hour burn is required after the lights have been energized.
Landscape inspections consist of inspecting all landscape material, irrigation system and grading on a project. Verifies building colors are per plan and construction of building is complete prior to sign-off. Inspect parking lot islands and the striping of parking lot parking bays to match approved plans. Inspects parking lot lighting when near an existing complex or subdivision to assure lighting does not impact adjacent buildings or homes. Inspect equipment screening and site amenities such as bike racks, benches, tot lots, etc.
- Contact John Martinez (480) 503-6847 for inspections.