Drawing.pdf
PDF 7 MB Posted
- Solicitation number
- BPM020067
- Issued by
- Garrett County, Maryland
About this file
This document contains drawings and notes related to the replacement of a culvert pipe along Potomac Camp Road in the Potomac Garrett State Forest in Maryland's Garrett County. The project involves the installation of a new 42-inch HDPE culvert pipe with precast concrete headwalls, as well as the stabilization of the stream bed upstream and downstream of the culvert. The contractor will be required to follow guidelines set forth in permits from the Maryland Department of the Environment (MDE) and the U.S. Army Corps of Engineers, including restrictions on in-stream work during certain times of the year. The work also includes traffic control, erosion and sediment control, backfilling, asphalt patching, and site restoration with topsoil, seed, and mulch.
The pricing terms, set-asides, or funding details are not provided in this document. However, the contract opportunity is for the culvert pipe replacement work at the Potomac Garrett State Forest in Garrett County, Maryland.
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Text version
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PIPE REPLACEMENT / INSTALLATION NOTES:
1. CONTRACTOR SHALL PROVIDE A SMOOTH TRANSITION TO EXISTING ASPHALT
PAVEMENT.
2. REPLACEMENT CULVERT PIPES SHALL MAINTAIN THE EXISTING INVERT ELEVATIONS
AND PIPE SLOPES.
3. REPLACEMENT CULVERT PIPES SHALL BE INSTALLED DURING AN EXPECTED PERIOD
OF DRY WEATHER.
4. PROJECT SCHEDULE SHALL MINIMIZE FACILITY DISRUPTIONS.
5. CONTRACTOR SHALL PROVIDE SHA CERTIFIED TRAFFIC CONTROLLERS AS
REQUIRED.
6. CONTRACTOR SHALL STABILIZE ALL DISTURBED AREAS WITH CLEAN TOPSOIL, SEED,
AND MULCH.
7. STEEL TRACK EQUIPMENT WILL NOT BE ALLOWED ON PAVED SURFACES.
8. CONTRACTOR WILL BE REQUIRED TO FOLLOW THE TIME OF YEAR STREAM
RESTRICTIONS SET FORTH IN THE JOINT MDE / ARMY CORP PERMITS.
8.1. NO IN STREAM WORK SHALL TAKE PLACE BETWEEN OCTOBER 1ST - APRIL
30TH INCLUSIVE OF ANY YEAR.
9. CONTRACTOR SHALL FOLLOW ALL GUIDELINES SET FORTH IN THE MDE / ARMY CORP
PERMITS ATTACHED TO THIS BID PACKAGE.
State of Maryland
DEPARTMENT OF NATURAL RESOURCES
Engineering & Construction
C.1
RIP RAP LOW FLOW
CONSTRUCTED STREAM
CHANNEL. CHANNEL WORK SHALL
COMPLY WITH MDE STANDARD
DETAIL D-4-1-C - ROCK OUTLET
PROTECTION. REFERENCE SHEET
C.2 FOR DETAILS.
WIDEN ROADWAY AS SHOWN.
DASHED LINE REPRESENTS
EDGE OF EXISTING ROADWAY.
HORIZONTAL SCALE
1" = 20'
CULVERT REPLACEMENT PLAN
SCALE: 1" = 20'
40201020
NEW 42" Ø HDPE CULVERT PIPE
W/ PRECAST CONCRETE HEADWALLS.
INVERT ELEV = 2515.99
PRECAST CONCRETE HEADWALLS.
INVERT ELEV = 2515.29
PATCH ROADWAY AS REQUIRED
AFTER PIPE REPLACEMENT.
NEATLY MATCH ADJACENT
ASPHALT SURFACES -PROVIDE FOR
A SMOOTH AND UNIFORM
TRANSITION BETWEEN OLD AND
NEW PAVED SURFACES.
STAGING / STORAGE AREA
PERMIT DRAWING REFERENCE
SCALE: AS NOTED
SEQUENCE OF CONSTRUCTION:
1. INSTALL TRAFFIC CONTROL DEVICES AND SIGNAGE ALONG POTOMAC CAMP ROAD.
2. INSTALL ALL EROSION AND SEDIMENT CONTROL DEVICES.
3. INSTALL A SAND BAG DAM / DIVERSION ABOVE AND BELOW THE PIPE, IN CONJUNCTION
WITH A BYPASS PUMPING SYSTEM. SYSTEM SHALL INCLUDE AN INTAKE HOSE W/
SCREEN, PUMP, AND A HOSE OUTLET STRUCTURE INTO A SEDIMENT BAG. PLACE THE
DEWATERING INTAKE AT THE DOWNSTREAM DAM TO CAPTURE WATER FROM THE
CONSTRUCTION AREA. REFERENCE DETAILS MGWC 1.1 AND 1.2.
4. AFTER THE PIPE AND WORK AREA HAS DRIED OUT, THE DETERIORATED CMP'S SHALL
BE EXCAVATED AND REMOVED FROM THE SITE.
5. NEW CORRUGATED HDPE PIPE SHALL BE INSTALLED TO REPLACE THE DETERIORATED
CMP CULVERT PIPE.
5.1 AFTER THE PIPE HAS BEEN INSTALLED, THE STREAM BED SHALL BE
STABILIZED UPSTREAM AND DOWNSTREAM. RIP RAP SHALL BE INSTALLED TO
STABILIZE AND INCREASE THE STREAM INVERT AT THE OUTFALL TO THE
NATURAL STREAM BED OVER 10'. (LOW FLOW CHANNEL)
6. AFTER THE NEW HDPE PIPE HAS BEEN INSTALLED, AND PROPERLY CONNECTED TO THE
CONCRETE HEADWALLS, CR-6 BACKFILL WILL BE INSTALLED AROUND THE
PIPE (COMPACTED IN 6” LIFTS) CR-6 FILL SHALL BE INSTALLED UP TO THE ADJACENT
SUBGRADE.
6.1 THE SANDBAG DIVERSIONS SHALL REMAIN IN PLACE FOR 36 HRS. AFTER
PLACEMENT OF CONCRETE OR GROUTING OPERATIONS.
7. PATCH ASPHALT DRIVEWAY AS REQUIRED.
8. 4” OF CLEAN TOP SOIL FILL MATERIAL SHALL THEN BE INSTALLED OVER ALL DISTURBED
AREAS AND GRADED TO MATCH THE ADJACENT TOPOGRAPHY. ALL DISTURBED AREAS
WILL BE STABILIZED WITH SEED AND MULCH.
9. UPON COMPLETION OF ALL STABILIZATION TASKS, THE E&S DEVICES SHALL BE
REMOVED AS DIRECTED BY THE MDE INSPECTOR.
State of Maryland
DEPARTMENT OF NATURAL RESOURCES
Engineering & Construction
C.2
TYPICAL BACKFILL DETAIL - ROADWAY SHOULDER
NOT TO SCALE
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