Micro-Trenching Detail EM-172
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ASPHALTIC SEALER SEE EM-172-6, NOTE (II) SIDEWALK (TYP) RIGHT OF WAY (TYP) FACE OF CURB (TYP) EDGE OF PAVEMENT (TYP) LIP OF GUTTER (TYP) VALLEY GUTTER PREFERRED PATHWAY IF GREATER THAN 4' HORIZONTAL CLEARANCE FROM EXISTING MANHOLES ALTERNATE PATHWAY IF PREFERRED IS LESS THAN 4' HORIZONTAL CLEARANCE FROM EXISTING MANHOLES NOTE: REFER TO MICRO-TRENCHING GENERAL NOTES ON EM-172-3 TO EM-172-5 AND MICRO-TRENCHING SURFACE RESTORATION NOTES ON EM-172-6 TO EM-172-8 4" MIN. FROM OUTSIDE EDGE OF THE MANHOLE BARREL SIDEWALK (TYP) RIGHT OF WAY (TYP) FACE OF CURB (TYP) EDGE OF PAVEMENT (TYP) PREFERRED PATHWAY MAINTAIN 2' HORIZONTAL CLEARANCE FROM EXISTING VALVES 2' MIN. FROM OUTSIDE EDGE OF VALVE COVER EXTENSION BIKE LANE STRIPE MICRO-TRENCH PATHWAY (TYP) MICRO-TRENCH PATHWAY (TYP) ASPHALT CONCRETE SUBGRADE CEMENTIOUS BACKFILL, EM-172-5, NOTE 6 CONDUIT SIDEWALK ASPHALTIC SEALER SEE EM-172-6 NOTE (II) CURB & GUTTER SEE EM-172-3, NOTE 2 (II) SEE EM-172-3, NOTE 2 (IV) ROADWAY MIN COVER SEE EM-172-3, NOTE 2 (I) SEE EM-172-3, NOTE 2 (IV, V, VI) MIN COVER SEE EM-172-3, NOTE 2 (I) EM-172-3, NOTE 1 EM-172-5, NOTE 5 CURB GUTTER SEE EM-172-3, NOTE 2 (IV) SEE EM-172-3, NOTE 2 (II) MIN COVER SEE EM-172-3, NOTE 2 (I) CONTRACTOR SHALL NOT CUT EXISTING REINFORCEMENT OR DOWELING IN VALLEY GUTTER APRON SEE EM-172-3, NOTE 2 (IV) ROADWAY MIN COVER SEE EM-172-3, NOTE 2 (I) ROADWAY NTS NTS NTS NTS NTS NTS ASPHALTIC SEALER SEE EM-172-6, NOTE (II) ROADWAY SEE EM-172-3, NOTE 2 (II) 3' MIN MIN COVER SEE EM-172-3, NOTE 2 (I) GUTTER MICRO-CONDUIT JUNCTION LOCATION (TYP) MICRO-CONDUIT JUNCTION MICRO-CONDUIT JUNCTION MICRO-CONDUIT TERMINATION LOCATION (TYP) EM-172-3, NOTE 1 EM-172-5, NOTE 5 NTS VALLEY GUTTER ASPHALTIC SEALER SEE EM-172-6, NOTE (II) SEE EM-172-3, NOTE 2 (II) SEE EM-172-3, NOTE 2 (II) SEE EM-172-3, NOTE 2 (IV, V, VI) ALTERNATE SECOND TRENCH PATHWAY IF JOINT TRENCH NOT POSSIBLE. SAWCUT TO A STRAIGHT/CLEAN EDGE (MAY EXCEED MICRO-TRENCH LIMITS IF NECESSARY). SEE EM-172-2 FOR DETAIL. JOINT MICRO-TRENCH WHEN SECOND TRENCH PRESENT (PREFERRED)) BIKE LANE STRIPE STANDARD DETAIL NO. ADOPTED BY COUNCIL: DECEMBER 2, 2025 TYPICAL MICRO-TRENCHING DETAILS EM-172-1 INSTALL CURB MARKER WHERE LATERAL SERVICE CROSSES BENEATH CURB (TYP) REVISION DATE: 01/2026 1'-6" MIN CONDUITS ZONE 6'-0" MIN 2.5" MAX WIDTH EXISTING CURB AND GUTTER NEW ASPHALT CONCRETE PAVEMENT GRIND AND CAP 4" DEEP TACK COAT EXIST. ASPHALT CONCRETE PAVEMENT THICKNESS VARIES SEE NOTE 1 SEE NOTE 3 FIRST INSTALLED CONDUIT SEE NOTE 4 SEE NOTE 2 STANDARD DETAIL NO. ADOPTED BY COUNCIL: DECEMBER 2, 2025 MICRO-TRENCHING SECOND TRENCH LOCATION EM-172-2 REVISION DATE: 01/2026 THE FOLLOWING STANDARDS APPLY TO MICRO-TRENCHING: 1. MICRO-TRENCHING IS NOT PERMITTED IN THE FOLLOWING AREAS: 2. MICRO-TRENCHING MUST: 3. LOCATION OF TRENCHES: STANDARD DETAIL NO. ADOPTED BY COUNCIL: DECEMBER 2, 2025 MICRO-TRENCHING GENERAL NOTES EM-172-3 NOTES: REVISION DATE: 01/2026 3. LOCATION OF TRENCHES (CONT.): 4. VAULTS AND SERVICE CONNECTIONS STANDARD DETAIL NO. ADOPTED BY COUNCIL: DECEMBER 2, 2025 MICRO-TRENCHING GENERAL NOTES EM-172-4 REVISION DATE: 01/2026 6. BACKFILL PROCEDURES 5. PAVEMENT CUTS STANDARD DETAIL NO. ADOPTED BY COUNCIL: DECEMBER 2, 2025 MICRO-TRENCHING GENERAL NOTES EM-172-5 REVISION DATE: 01/2026 THE ASPHALTIC SEALING MATERIAL, ALSO KNOWN AS AN OVERBAND, PLACED OVER THE TOP OF A MICRO-TRENCH SHALL CONFORM TO MAG STANDARD 337 AND BE APPLIED ACCORDING TO THE MANUFACTURER'S RECOMMENDATIONS OR THE REQUIREMENTS OF THIS STANDARD WHICHEVER IS MORE STRINGENT. STANDARD DETAIL NO. ADOPTED BY COUNCIL: DECEMBER 2, 2025 MICRO-TRENCHING SURFACE RESTORATION NOTES EM-172-6 ASPHALTIC SEALER/OVERBAND REVISION DATE: 01/2026 STANDARD DETAIL NO. ADOPTED BY COUNCIL: DECEMBER 2, 2025 MICRO-TRENCHING SURFACE RESTORATION NOTES EM-172-7 REVISION DATE: 01/2026 STANDARD DETAIL NO. ADOPTED BY COUNCIL: DECEMBER 2, 2025 MICRO-TRENCHING SURFACE RESTORATION NOTES EM-172-8 REVISION DATE: 01/2026