Attachment 2. Civil plans - Associated Engineering

Erosion & Sediment Control Plan - West Park At Thetis

Plan Features

• Phases: Map identifies Phase 1 through Phase 6.
• Sediment Control Measures:
  • Stabilized Construction Entrance (See Detail 4 C-902)
  • Silt Fence (Typical)
  • Temporary Lawn Basin (Discharging to Phase 1 or Phase 3 Storm)
  • Sediment Control Ditch
  • Swale

Design Flow Data

• Sediment Control Ditch (North): DESIGN FLOW 10YR = 63.1 L/S, VELOCITY = 0.925 M/S, 1 M BW, 3H:1V, 25KG
• Sediment Control Ditch (Central): DESIGN FLOW 10YR = 20.04 L/S, VELOCITY = 0.44 M/S, 1 M BW, 3H:1V, 10KG

[Map 2: Site plan emphasizing erosion control measures like silt fencing and temporary basins across all six phases.]

Project Information

• Client: Limona Construction
• Project: West Park At Thetis
• Scale: 1:500
• Drawing Name: Civil Erosion & Sediment Control Plan
• Drawing Number: 2253-00-C-901
• Revision: A

Revision History

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Notes & Details - West Park At Thetis

Detail 1: Sediment Control Ditch

[Diagram 1: Cross-section and profile of sediment control ditch showing riprap check dams.]

Detail 2: Silt Fence Detail

[Diagram 2: Technical drawing of a silt fence installation, including post spacing and fabric embedment.]

Detail 3: Swale Cross Section

[Diagram 3: Profile of a 2.4m wide, 0.3m deep swale.]

Detail 4: Stabilized Construction Entrance & Tire Wash

[Diagram 4: Plan and section views of a construction entrance featuring a wheel wash sump and crushed aggregate.]

Silt Control Notes

1. PERMITTIVITY OF GEOFABRIC TO BE ~ 10L/S/m2
2. SPLICES TO BE AT POSTS SUCH THAT EACH PIECE IS WRAPPED FULLY AROUND POST.
3. SILT FENCE TO HAVE AN EFFICIENCY >75%. WHERE EFFICIENCY IS LESS THAN THIS EMPLOY SUCCESSIVE FENCES TO REACH THE DESIRED AMOUNT.
4. AT COMPLETION OF WORK SILT TO BE REMOVED AND DISPOSED OF.

Sediment & Erosion Control Notes

THE CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTENANCE AND INSPECTION OF ALL SEDIMENT AND EROSION CONTROL FACILITIES, SHALL PROVIDE REGULAR INSPECTION REPORTS TO THE CIVIL ENGINEER AND SHALL COORDINATE ANY REMEDIATION REQUIRED BY THE ENGINEER.

ALL PRACTICAL AND NECESSARY EFFORT SHOULD BE TAKEN DURING CONSTRUCTION TO CONTROL AND PREVENT EROSION AND THE TRANSPORT OF SEDIMENT TO SURFACE DRAINS, SURFACE WATER OR ONTO OTHER PROPERTY BY ANY OR ALL OF THE FOLLOWING METHODS:

1. CONSTRUCT A STABILIZED CONSTRUCTION ENTRANCE AND WHEEL WASH.
2. DIRECT ALL STORMWATER DISCHARGE TO EXISTING STORM SYSTEM THROUGHOUT CONSTRUCTION.
3. STABILIZED CONSTRUCTION ENTRANCE TO REMAIN IN PLACE UNTIL EXCAVATION AND GRADING IS COMPLETE AND ALL SURFACES ARE STABILIZED.
4. TEMPORARY SEDIMENT AND EROSION CONTROL MEASURES SUCH AS SILT FENCE AND STREET SWEEPING ARE TO BE EMPLOYED WHEREVER NECESSARY TO PREVENT MIGRATION OF SEDIMENT OFF-SITE. NEARBY OFF-SITE STREETS AS WELL AS COMPLETED ON-SITE PAVING MUST BE KEPT CLEAN THROUGH REGULAR STREET SWEEPING. DURING CONSTRUCTION, THESE MEASURES SHALL BE REGULARLY INSPECTED AND REPLACED OR EMPLOYED AS REQUIRED OR AS DIRECTED BY THE CIVIL ENGINEER. SILT FENCE TO BE INSTALLED DOWN GRADE FROM EXCAVATED OR DISTURBED AREAS UNTIL SURFACES ARE STABILIZED.
5. DURING DRY WEATHER, SPRINKLERS ARE TO BE PLACED ADJACENT TO EXCAVATION OR GRADING ACTIVITIES TO PREVENT DUST FROM LEAVING THE SITE.
6. DUST CONTROL FABRIC TO BE INSTALLED ON TEMPORARY CONSTRUCTION FENCING AS REQUIRED TO PREVENT DUST MIGRATION.
7. ALL DRAINAGE INLETS SHALL BE PROTECTED FROM SEDIMENTATION WITH FILTER CLOTH DURING CONSTRUCTION. THIS PROTECTION SHALL BE INSPECTED WEEKLY AND AFTER ANY SIGNIFICANT RAINFALL EVENT. FILTER FABRIC SHALL BE REPLACED AS IT BECOMES BLINDED WITH SEDIMENT OR DAMAGED, OR AS DIRECTED BY THE CIVIL ENGINEER.
8. IT IS THE CONTRACTOR'S RESPONSIBILITY TO ENSURE GRADES ARE MAINTAINED IN SUCH AS WAY THAT ALL STORMWATER RUNOFF IS DIRECTED TOWARD STORMWATER CONTAINMENT FACILITIES.
9. NO STOCKPILING OF GRANULAR MATERIAL IS PERMITTED ON PAVED SURFACES. ANY EXISTING MATERIAL BEING STOCKPILED AS PART OF SITE GRADING EXERCISES SHALL BE PLACED WITHIN 3 DAYS OR SURROUNDED BY SILT FENCE TO CONTAIN EROSION. SILT FENCE SHALL BE INSTALLED DOWN GRADE FROM PRE-LOAD MATERIAL.
10. COMPACTION AND/ OR VEGETATION OF DISTURBED GROUND SURFACES SHALL BE ACCOMPLISHED AS SOON AS POSSIBLE AND PRACTICAL.
11. THE USE OF ANY CONSTRUCTION EQUIPMENT THAT LEAKS EXCESSIVE AMOUNTS OF FUEL, OIL OR HYDRAULIC FLUID IS PROHIBITED.
12. ANY SPILLAGE OF HAZARDOUS MATERIALS OR MATERIALS WHICH MAY BE DETRIMENTAL TO THE ENVIRONMENT MUST BE CLEANED UP IMMEDIATELY AND THE PROPER AUTHORITIES MUST BE NOTIFIED, AS REQUIRED BY LAW.
13. UPON COMPLETION OF CONSTRUCTION, ANY ACCUMULATED SEDIMENT IS TO BE REMOVED FROM ALL SUMP INLETS, CATCH BASINS AND STORM MANHOLES.
14. UPON COMPLETION OF CONSTRUCTION, TEMPORARY SEDIMENT AND EROSION CONTROL MEASURES SUCH AS SILT FENCE, SHALL BE REMOVED.
15. MONITOR SEDIMENT LEVELS IN STORMCEPTOR UNITS AFTER RAINFALL EVENTS. CLEAN AS REQUIRED DURING CONSTRUCTION AND WHEN CONSTRUCTION IS COMPLETE.

Project Information

• Client: Limona Construction
• Project: West Park At Thetis
• Scale: As Shown
• Drawing Name: Civil Notes & Details
• Drawing Number: 2253-00-C-902
• Revision: A

Revision History

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Typical Sections Plan View - PH 3-6

Plan Details

• Station Indicators: The plan shows survey stations (e.g., +000, +020) along the roadway for Phases 3 through 6.
• Section Lines: Indicators for typical cross-sections A-A, B-B, C-C, D-D, E-E, and F-F are marked on the map.
• Greenspace: Large areas designated as Greenspace are located at the perimeter of the development.

[Map 3: Plan view drawing showing the location of cross-sections 1 through 6 across the Phase 3 to Phase 6 development area.]

Project Information

• Client: Limona Construction
• Project: West Park At Thetis
• Scale: 1:500
• Drawing Name: Civil Typical Sections Plan View - PH 3-6
• Drawing Number: 2253-00-C-801
• Revision: A

Revision History

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Typical Sections Phase 3-6

Section A-A (Detail 1)

[Diagram 5: Section A-A showing existing ground vs. proposed subgrade elevations.]

• Scale: H 1:500 V 1:250

Section B-B (Detail 2)

[Diagram 6: Section B-B profile.]

• Scale: H 1:500 V 1:250

Section C-C (Detail 3)

[Diagram 7: Section C-C profile showing structural pads P1 and P2.]

• Scale: H 1:500 V 1:250

Section D-D (Detail 4)

[Diagram 8: Section D-D profile.]

• Scale: H 1:500 V 1:250

Section E-E (Detail 5)

[Diagram 9: Section E-E profile.]

• Scale: H 1:500 V 1:250

Section F-F (Detail 6)

[Diagram 10: Section F-F profile showing structural pads P1 and P2.]

• Scale: H 1:500 V 1:250

Project Information

• Client: Limona Construction
• Project: West Park At Thetis
• Scale: As Shown
• Drawing Name: Civil Typical Sections Phase 3-6
• Drawing Number: 2253-00-C-802
• Revision: A

Revision History