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Subdivision Review Comments
All Subdivision Review Comments for Case # 17CP0012




For VDOT’s comments please contact Virginia Department of Transportation at (804) 674-2814 or send e-mail to Boris.Solomonov@VDOT.Virginia.gov

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CASE NO: 17CP0012 STATUS: PENDING APPROVAL
PROJECT NAME: HARPERS MILL SOUTHEA - LAST INTERNET UPDATE: 11/22/17
SUBMITTAL TYPE: CONSTRUCTION PLAN
DEPARTMENT...REV..ROUTED..RESPONSE..STATUS....DATE...RVW..PHONE
ENVIR.ENGR.-: 00 07/27/16 08/24/16 COMPLETE 08/25/16 MCJ 751-2335
FIRE DEPT.--: 00 07/27/16 08/24/16 COMPLETE 08/08/16 JKL 748-1489
PLANNING----: 00 07/27/16 08/24/16 COMPLETE 08/30/16 GWK 706-7691
TRANSPORT.--: 00 07/27/16 08/24/16 COMPLETE 08/24/16 SES 751-4912
UTIL.PLAN.--: 00 07/27/16 08/24/16 ******** ********
UTILITIES---: 00 07/27/16 08/24/16 AMENDED* 09/01/16 LV 748-1863
UTIL.R.O.W.-: 00 07/27/16 08/24/16 ******** ********
VDOT--------: 00 07/27/16 08/24/16 ******** ********
REVIEW DEPARTMENT: UTILITIES DEPARTMENT
REVIEWER/PHONE # : LINNETTE VASQUEZ, P.E./748-1863
NAME OF PLAN : HARPER'S MILL SOUTHEAST - SECTION 3
ADDRESS : PART OF 716-662-3359
SUBMISSION DATE : 7/29/16
PLAN DATED : 6/24/16
REVIEW DATE : 8/30/16
SITE PLAN NO. : 17CPO0012
COMMENTS : 1ST REVIEW-NOT APPROVED
TABLE REVIEW :
PLAT PROCESS :
1. UTILITIES PROJECT 16-0028 NUMBER SHALL BE PLACED ON
THE LOWER RIGHT HAND CORNER OF EACH SHEET.
2. TAKE ALL STEPS NECESSARY TO PROVIDE COMPLETE AGREEMENT
BETWEEN THIS SET OF PLANS AND THOSE FOR ALL CONNECTING
PROJECTS. PLEASE PROVIDE INFORMATION ON CONNECTING PROJECTS
NAMES AND PROJECT NUMBERS.
3. PROVIDE A COPY OF AN OVERALL PLAN FOR SECTION.
4. PROVIDE NORTH ARROW ON PLAN VIEW SHEETS.
5. PROVIDE A COPY OF THE SEWER HYDRAULIC ANALYSIS THAT
INCLUDES THIS SECTION WITH MAP AND CALCULATIONS SHEET.
6. ADD STREET NAMES BORDERING THIS SECTION ON VICINITY
MAP INCLUDING MAJOR STREET NAMES ON EAST AND SOUTH OF
PROJECT.
7. ADD THE FOLLOWING UTILITIES CONTACT INFORMATION TO THE
PLAN: LINNETTE D. VASQUEZ, PE, SENIOR ENGINEER, 804-748-
1863, VASQUEZL@CHESTERFIELD.GOV
8. PROVIDE AND/OR NOTE LOCATION OF MISS UTILITY NOTE.
9. ADD PUBLIC UTILITIES LABEL TO MATERIALS LIST. REVISE
NUMBER OF SERVICE CONNECTIONS TO MATCH PLAN SHEETS OF 34
SERVICE CONNECTIONS TOTAL. LABEL OR MODIFY LOT AT END OF
FREEBRIDGE RD ACROSS FROM LOTS # 28 AND 29. IS THIS ANOTHER
LOT? NEEDED WATER SERVICE?
10. REVISE LEGEND TO INCLUDE ALL SANITARY SEWER AND WATER
MAINS, OTHER UTILITIES, STRUCTURES, EXISTING AND PROPOSED
GROUND, PAVEMENT PROFILE, AND WALKING PATH ON COVER SHEET
11. SHOW ALL ADJACENT PROPERTY OWNER NAME(S) AND ALL
PROPERTY MARKERS ARE SHOWN.
12. CLEARLY LABEL ALL ROAD NAMES FOR BOTH PROPOSED AND
EXISTING ROADS. MOVE LABELS FOR FREEBRIDGE RD. AND
FREEBRIDGE PLACE CLOSER TO ROAD. PROVIDE LABEL FOR FAWNWOOD
LANE WEST OF FREEBRIDGE RD.
13. PROVIDE RIGHT OF WAY WIDTHS FOR ALL ROADS INCLUDING
FREEBRIDGE RD AND FAWNWOOD LANE.
14. PROVIDE A COPY OF NOTIFICATIONS TO ALL ADJACENT
PROPERTY OWNERS PRIOR TO PERFORMING ANY DESIGN AND/OR
SURVEYING WORK. COORDINATE WITH APPLICABLE ADJACENT
PROPERTY OWNERS IN REGARDS TO ANY POSSIBLE IMPACTS
INCLUDING BUT NOT LIMITED TO PROPERTY ACCESS.
15. WHEN DEMOLISHING EXITING WATER AND/OR SANITARY
APPURTENANCES ADD A NOTE STATING THAT, " ALL SALVAGEABLE
ITEMS ARE TO BE RETURNED TO THE CHESTERFIELD COUNTY
DEPARTMENT OF UTILITIES AS DIRECTED BY THE CONSTRUCTION
INSPECTOR.
16. IS AN IRRIGATION SYSTEM BEING PROPOSED WITH THE
SECTION? PLEASE PROVIDE IRRIGATION METER IF APPLICABLE ON
PLAN SHEETS. A BACKFLOW PREVENTION DEVICE ARE REQUIRED ON
ALL RESIDENTIAL IRRIGATION METERS. PROVIDE DEVICE TYPE,
LOCATION, AND SIZE ON PLANS IF APPLICABLE.
17. IS A LANDSCAPE PLAN BEING INCLUDED WITH PLANS? VERIFY
THAT NO LIGHT POLES OR TREES ARE LOCATED WITHIN A WATER OR
SEWER EASEMENT.
18. VERIFY ALL EXISTING AND PROPOSED STORM SEWER LINES,
GAS, TELEPHONE, POWER, AND OTHER UTILITY LINES WHICH CROSS
OR RUN PARALLEL TO THE SEWER OR WATER MAINS , ARE SHOWN
WITH HORIZONTAL AND VERTICAL SEPARATIONS GIVEN.
19. VERIFY ALL EXISTING EASEMENTS ARE SHOWN ACCURATELY AND
REFLECT THE APPROPRIATE RECORDATION INFORMATION. NOTE THAT
ALL PUBLIC WATER/SEWER LINES AND WATER SERVICES AND
LATERALS FOR LOT # 28 AND # 28 AND SEWER LATERAL ACROSS
STREET MUST BE IN RECORDED EASEMENTS OR DEDICATED RIGHT OF
WAY PRIOR TO ACCEPTANCE BY UTILITIES. REVISE ROW OR EXTEND
EASEMENT TO INCLUDE PROPOSED WATER OUTSIDE LIMITS OF
SUBDIVISION ON FREEBRIDGE RD AND FAWNWOOD LANE.
20. NOTE THAT THIS PLAN WILL NOT BE APPROVED AND/OR
RELEASED TO CONSTRUCTION UNTIL ALL EXISTING TIE IN
LOCATIONS ARE UNDER CONTRACT WITH THE UTILITIES DEPARTMENT.
21. CLEARLY SHOW AND LABEL (WITH CTY PRJ #) ALL EXISTING
AND OR PROPOSED UNDER ANOTHER PROJECT WATERLINES AND TEES
ON UTILITY PLAN AND PROFILE SHEETS ON VERNEHAM DR AND
FARNWOOD LANE. CLARIFY PROPOSED TAPPING SLEEVE AND VALVE OR
CUT-IN TEE WITH MINIMAL DISRUPTION OF SERVICE TO ADJACENT
PROPERTY OWNERS. LABEL 6" WATERLINE WITH TYPE AFTER REDUCER
ON FREEBRIDGE RD AND FREEBRIDGE PLACE. LABEL ALL TYPES OF
WATERLINES WITH PIPE MATERIAL.
22. PROVIDE LOCATION AND DIMENSIONS OF ALL EXISTING AND
PROPOSED WATER AND SEWER SERVICE CONNECTIONS. A TYPICAL
(TYP) OF EACH MAY BE LABELED PER SHEET. NOTE ¾" CORP STOP
TO 5/8" WATER METER AND ¾" COPPER SERVICE. FOR 1" SERVICE
LINE NOTE 1" CORP STOP.
23. VERIFY THAT CONFIGURATION FOR WATER LINE AT THE END OF
FREEBRIDGE RD. IS THE CLOSEST POSSIBLE TO DETAIL WAT-5.
EVALUATE IF OTHER OPTIONS ARE AVAILABLE TO DECREASE WATER
SERVICE LENGTHS TO LOTS # 11,12,13 & 14. ADD A SEPARATE
LABEL FOR LOT #13.
24. MOVE LATERAL FOR LOT # 12 TO MANHOLE.
25. LABEL STREET NAME ON PROFILE VIEW FOR FREEBRIDGE
PLACE.
26. VERIFY IF THE WATERLINE CONFIGURATION OF PIPE ALONG
FREEBRIDGE RD, FREEBRIDGE PLACE, AND FAWNWOOD LANE CAN BE
SMOOTHED OUT WITH A MINIMUM OF 6" OF SEPARATION DISTANCE
AND ONE SEGMENT OF DUCTILE IRON PIPE CENTERED AT THE
CROSSING.
27. REVISE LABELS FOR RESTRAINED JOINT PIPE UP ON PROFILE
SHEET CLOSER TO PROPOSED PIPE OR CLEARLY PROVIDE LINES TO
LABEL.
28. SHOW AND LABEL EXISTING SEWER LINE AT TIE IN MANHOLE
ON PROFILE SHEETS. VERIFY MATCHING OF PIPE CROWN
ELEVATIONS AND ADD A "MATCH CROWNS" NOTE TO PROFILE SHEETS.
PROVIDE CTY PRJ # ON PLAN SHEETS.
29. VERIFY ALL APPLICABLE MINIMUM FINISHED FLOOR AND
BASEMENT ELEVATIONS ARE SHOWN AS APPLICABLE. VERIFY WITH
RESPONSE TO THIS COMMENT IF ANY LOTS REQUIRE MINIMUM FINISH
FLOOR (MFF) DESIGNATIONS. PROVIDE THE FOLLOWING INFORMATION
FOR EACH REQUIRED LOT WITH A MFF DESIGNATION IF APPLICABLE:
THE MINIMUM FINISH FLOOR (SEWER) ELEVATION.
B. A NOTE STATING THAT THE SEWER CONNECTION IS TO BE
INSTALLED AT 1% GRADE.
C. THE INVERT ELEVATION AT THE END OF THE SEWER
CONNECTION.
D. THE "LOT SHOT" GROUND ELEVATION AT THE APPROXIMATE
FRONT BUILDING LINE.
E. THE "BUILDING ENVELOPE" (WITH RESPECT TO PROVIDING
GRAVITY SANITARY SEWER SERVICE).
30. SHOW AND LABEL JUMPER LOCATIONS ON PLANS.
31. PROVIDE LOCATION OF DETAIL MAN-2 ON PLANS. ENSURE ALL DE
ARE UPDATED.
32. ADD A NOTE TO PLAN INDICATING WHICH SEWER LATERALS
WERE INSTALLED UNDER PRIOR PLANS WITH UTILITIES PROJECT
NUMBER AND WHICH LATERALS WILL BE INSTALLED WITH THIS PLAN.
33. ADD A NOTE TO PLAN INDICATING WHICH WATER LATERALS
WERE INSTALLED UNDER PRIOR PLANS WITH UTILITIES PROJECT
NUMBER AND WHICH LATERALS WILL BE INSTALLED WITH THIS PLAN.
34. MOVE FIRE HYDRANT AWAY FROM THE FRONT OF LOT # 34
IDEALLY CLOSEST TO THE HIGH POINT IN LINES AND IN OPEN
SPACES IF POSSIBLE. DARKEN ALL FIRE HYDRANTS ON PLAN SHEETS
TO BE CLEARLY VISIBLE.
35. CLEARLY MOVE ALL WATER AND SEWER LATERALS OUTSIDE THE
LIMITS OF PROPOSED DRIVEWAYS. FOR LOT #32 MOVE WATER
SERVICE ON THE OTHER SIDE OF LOT NEAR PROPERTY LINE. MOVE
LOT #16 AND LOT #30 WATER SERVICE AND LOT #6 SEWER LATERAL
OUTSIDE OF DRIVEWAY.
36. UPDATE SIMULTANEOUS FLOW TEST INFORMATION RESULTS ON
WATER FLOW INFORMATION AS PER DES-5 ON WATER MODEL & FLOW
CALCULATION SHEET TO REFLECT PIPES SIZES PROPOSED. REVISE
HAZEN WILLIAMS COEFFICIENT TO 120 FROM 150.
37. IS THERE A SECOND FOR WATER FOR THIS SUBDIVISION?
PLEASE INDICATED TIME FRAME.
38. VERIFY PIPES ARE SIZED FOR THE PROPOSED USE AND
LOCATION. COORDINATE AGREEMENT FOR WATERLINE SIZES BETWEEN
THIS SET OF PLANS AND THE PROPOSED TENTATIVE.
39. CLEARLY LABEL WHAT THE DASHED LINE IS IN FRONT OF LOT
#24 SOUTH OF THE SIGHT DISTANCE EASEMENT LINE NEAR TO WHERE
WATER SERVICE LATER IS PROPOSED.
40. EXTEND WATERLINE STUBS AT END OF LINES ALONG FAWNWOOD
LANE AND FREEBRIDGE ROAD A FULL LENGTH OF PIPE TO MINIMIZE
WATER SERVICE OUTAGE WHEN THE LINE IS EXTENDED IN THE
FUTURE.
41. PROVIDE THRUST PROTECTION AT ALL BENDS, TRANSITIONS,
AND END OF LINES INCLUDING FAWNWOOD LANE AND FREEBRIDGE
ROAD. CALCULATE AND LABEL LENGTH OF ALL RESTRAINT JOINT
PIPE SYSTEMS. CLEARLY SHOW AND LABEL ON PROFILE SHEETS.
PROVIDE NOTE INDICATING ALL FITTINGS ARE TO BE RESTRAINED.
42. REVISE NOTE # 2 ON UTILITIES PLAN SHEET TO ADD "OR THE
RIGHT-OF-WAY LINE, WHICHEVER IS GREATER." AND TO ALSO
INCLUDE SEWER LATERALS.
43. CALCULATE AND LABEL DISTANCE FROM EXISTING VALVE TO
PROPOSED CONNECTION ON UTILITIES PLAN SHEET.
44. ADD A NOTE STATING PARSONS PMI3DE MANHOLE INSERT W/
VALVE, GASKET, AND STRAP OR APPROVED EQUAL ARE THE REQUIRED
INSERTS.
45. THE OWNER SHALL BE REQUIRED TO ENTER INTO A COUNTY
UTILITIES CONTRACT PRIOR TO THE START OF CONSTRUCTION.
PRIOR TO THE PREPARATION OF THE UTILITIES CONTRACT,
UTILITIES MUST BE IN RECEIPT OF THE "ACCEPTED" BID PROPOSAL
BETWEEN THE DEVELOPER AND THE COUNTY APPROVED UTILITIES
CONTRACTOR AS WELL AS THE PROJECT'S INFORMATIONAL SHEET
FOUND ON THE "DEVELOPER'S CHECKLIST". PLEASE SEND THOSE TWO
ITEMS TO THE ATTENTION OF LINNETTE VASQUEZ
(VASQUEZL@CHESTERFIELD.GOV). THE BID PROPOSAL
MUST BE BASED ON THE APPROVED SITE PLAN. BE ADVISED THAT IF
THE SITE PLAN IS REVISED AND REAPPROVED SUBSEQUENT TO THE
PREPARATION OR RECORDATION OF THE UTILITIES CONTRACT, THE
BID PROPOSAL SHALL BE REVISED ACCORDINGLY AND A REVISED
UTILITIES CONTRACT MAY BE NECESSARY.
46. AFTER FINAL SITE PLAN APPROVAL, SUBMIT THREE SETS OF
THE APPROVED PLANS DIRECTLY TO THE UTILITIES DEPARTMENT FOR
OUR USE DURING CONSTRUCTION INSPECTION. THIS IS IN
ADDITION TO THE ONE APPROVED SET FROM PLANNING (4 TOTAL
SETS).
REVIEW DEPARTMENT: CHESTERFIELD TRANSPORTATION DEPARTMENT
REVIEWER/PHONE#: STEVEN E. SIMONSON, P.E. (804)748-1037
NAME OF PLAN: HARPER'S MILL SE, SEC 3
CASE NUMBER: 17CP0012
LATEST PLAN DATE: 06/24/2016
DEPT. REC'D. DATE: 07/29/2016
SUBMITTAL NUMBER: ONE
REVIEW DATE: 08/24/2016
RECOMMENDATION: APPROVED - WITH COMMENT
TABLE REVIEW: YES
NOTE: THE PHASING PLAN FOR HARPER'S MILL, DATED JUNE 25,
2015 REQUIRES THE EXTENSION OF HARPER'S MILL PARKWAY FROM
DEELEY LANE TO THIRSK LANE, AND A BOND FOR THE EXTENSION OF
THE PARKWAY TO THE EASTERN PROPERTY LINE, PRIOR TO THE
RECORDATION OF MORE THAN 50 LOTS SOUTH OF HARPER'S MILL
PARKWAY AND EAST OF VERNEHAM DRIVE.
PLAN NAME : HM SOUTHEAST SECTION 3
PLAN NUMBER : 17CP0013
ORIGINAL PLAN DATE : 6/21/16
REVIEW DATE : 8/30/16
LATEST SUBMISSION DATE : 6/24/16
ACCEPTED FOR REVIEW: 7/27/16
SUBMITTAL NUMBER : 1
STATUS : CORRECTIONS REQUIRED
TABLE REVIEW : N
1. INCLUDE CONSTRUCTION PLAN NUMBER 17CP0012 IN THE LOWER
RIGHT CORNER
2. THE VDOT TYPE III BARRICADE NOTE INDICATES THAT A DETAIL
IS SHOWN ON SHEET 6.2 WHEN IT IS ACTUALLY SHEET 6.3. REVISE
3. EXTENDI THE BUFFER ALONG VERNEHAM ROAD TO THE EXTENT
OF THE CONSTRUCTION PLAN BOUNDARY
4. ADD BUILDING LINES FOR LOTS 4, AND 6-7. THE BUILDABLE AR
FOR LOT 4 WILL BE MUCH SMALLER THAN OTHERS. PLEASE BE
SURE THAT THE DESIRED PRODUCT WILL FIT WITHIN THE
BUILIDABLE AREA.
CONDITIONS
1. HARPERS MILL SOUTH SECTION 1 SHALL BE RECORDED PRIOR
TO OR IN CONJUNCTION WITH THS SECTION.
NOTE
SIDEWALKS ARE REQUIRED ALONG BOTH SIDES OF VERNEHAM DRIVE.
EXTENSION OF THE SIDEWALK WILL BE REQUIRED WITH ANY NEW
CONSTRUCTIONS PLAN THAT PROPOSE EXTENSION OF VERNEHAM
DRIVE.
REVIEW DEPARTMENT: FIRE AND LIFE SAFETY
REVIEWER / PHONE#: KIM LESTER / 748-1489
PLAN NAME: HARPERS MILL SOUTHEAST, SEC. 3
PLAN NUMBER: 17CP0012
LATEST REVISION DATE: 6/24/16
REVIEW DATE: 8/5/16
LATEST SUBMISSION DATE: 8/1/16
SUBMITTAL NUMBER: 1ST REVIEW
STATUS: NOT APPROVED
TABLE REVIEW: YES
PLACE A NOTE ON THE PLANS THAT STATES "NO BUILDING PERMITS
WILL BE RELEASED FOR LOTS 26 THRU 32 ON FREEBRIDGE ROAD
UNTIL THE TEMPORARY CUL-DE-SAC IS BUILT OR THE EXTENSION
OF THE ROAD IS BUILT WHICHEVER COMES FIRST."
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
============================================================
============================================================
REVIEW DEPARTMENT : ENVIRONMENTAL ENGINEERING
REVIEWER/PHONE # : MARIA JENKINS/751-2335
NAME OF PLAN : HARPERS MILL SOUTHEAST SECTION 3
SITE PLAN NO. : 17CP0012
LATEST PLAN DATE : 06/24/16
DEPT. REC'D DATE : 07/27/16
SUBMITTAL NUMBER : 1
REVIEW DATE : 08/25/16
RECOMMENDATION : REVISIONS REQUIRED
TABLE REVISION : NO
PLAT PROCESSING : NO
1. IT IS THE RESPONSIBILITY OF THE APPLICANT TO COMPLY
WITH AND/OR ACQUIRE ALL APPLICABLE FEDERAL AND/OR STATE
PERMITS IN RELATIONSHIP TO ENVIRONMENTAL FEATURES INCLUDING
BUT NOT LIMITED TO WETLANDS, SURFACE WATERS (E.G. VSMP
PERMIT FOR CONSTRUCTION SITES, GROUND WATER AND AIR
QUALITY) FINAL APPROVAL OF THESE PLANS WILL NOT RELIEVE YOU
OF YOUR RESPONSIBILITY. WETLANDS DOCUMENTATION MUST BE
RECEIVED BY THIS DEPARTMENT PRIOR TO ISSUANCE OF THE LAND
DISTURBANCE PERMIT.
2. THIS OFFICE RECOGNIZES THAT THE 10-YEAR PRE/10-YEAR POST
REQUIREMENTS FOR FLOOD PROTECTION MAY BE ADDRESSED BY
DISCHARGING INTO THE 100-YEAR FLOODPLAIN.
=== EROSION CONTROL ===
1. AN ITEMIZED EROSION CONTROL COST ESTIMATE MUST BE
SUBMITED FOR REVIEW AND/OR APPROVAL.
2. AS A PREREQUISITE TO THE ISSUANCE OF A LAND
DISTURBANCE PERMIT:
A) A COPY OF THE AUTOCAD FILE MUST BE SUBMITTED TO
CAROLE CLIBORNE OF THE ENVIRONMENTAL ENGINEERING. THE
AUTOCAD FILE MUST BE SAVED AS A .DWG OR .DXF IN AUTOCAD
VERSION 2009 OR EARLIER AND REFERENCED DIRECTLY TO THE
VIRGINIA STATE PLANE COORDINATE SYSTEM, SOUTH ZONE IN
THE NAD83 DATUM. THE AUTOCAD FILE MAY BE SUBMITTED ON A
CD, DVD, OR VIA EMAIL AND MUST BE CLEARLY LABELED WITH
THE SUBDIVISION NAME AND SECTION, SUBDIVISION PLAN
NUMBER, ENGINEERING FIRM AND CAD FILE PREPARER'S NAME
AND PHONE NUMBER. THE FILE MUST CONTAIN THE FOLLOWING,
EACH CLEARLY LABELED IN SEPARATE LAYERS:
I.EDGES OF ROADS TO INCLUDE CURB AND GUTTER; AND
II. EDGES OF SIDEWALKS;
THE FILE MUST BE APPROVED BY ENVIRONMENTAL ENGINEERING
PRIOR TO ISSUANCE OF THE LAND DISTURBANCE PERMIT.
B) FLAGGING AROUND USACOE JURISDICTIONAL WETLANDS,
BUFFERS, AND SENSITIVE AREAS MUST BE VISIBLE.
C) DOCUMENTATION FROM THE USACOE/DEQ MUST BE RECEIVED
VERIFYING COMPLIANCE TO WETLAND PERMIT REGULATIONS.
D) A PROCESSED VSMP REGISTRATION AND FEE FORM MUST BE
RECEIVED.
E) IF APPLICABLE, A COPY OF VDOT LAND USE PERMIT MUST
BE RECEIVED.
F) AN EROSION CONTROL BOND MUST BE POSTED.
G) AS APPLICABLE, A SWPPP BOOKLET (3 RING BINDER) MUST
BE PROVIDED.
3. THESE ARE IN REGARDS TO THE MS-19:
A) PLEASE PROVIDE FULL AND COMPLETE HYDROLOGIC
CALCULATIONS FOR THE MS-19 AT SECTIONS 23A/23B/31A/31B
/39/40/41/ETC. (I.E. 2-YEAR DISCHARGE CALCULATIONS,
RUNOFF COEFFICIENTS, TIME OF CONCENTRATION, ETC.) FOR
FURTHER REVIEW AND APPROVAL.
B) DISCREPANCIES WERE FOUND WHEN COMPARING THE
INFORMATION USED IN THE MS-19 SECTION 23A WITH THE 100-
YEAR FLOODPLAIN X-SECTION M-M (I.E. MANNING ROUGHNESS
COEFFICIENT, THE X-SECTION OF THE CHANNEL, SLOPES, ETC.)
DO NOT MATCH. THESE TWO SECTIONS-LOCATIONS ARE LOCATED
ALMOST AT THE SAME LOCATION. REVISE ACCORDINGLY.
C) A SIMILAR SITUATION EXISTS WITH THE INFORMATION USED
IN THE MS-19 SECTION 39 WITH THE 100-YEAR FLOODPLAIN X-
SECTION S-S (I.E. MANNING ROUGHNESS COEFFICIENT, THE X-
SECTION OF THE CHANNEL, SLOPES, ETC.) DO NOT MATCH.
THESE TWO SECTIONS-LOCATIONS ARE LOCATED ALMOST AT THE
SAME LOCATION. BE SURE THE DATA MATCH. REVISE
ACCORDINGLY.
D) THE DRAFT LETTER FOR THE MS-19 VARIANCE REQUEST
LETTER DATED 06/28/16 BELOW STRUCTURES 23/31/39 AND
BELOW ENERGY DISSIPATER PIT LOCATED AT THE END OF
FREEBRIDGE ROAD/FAWNWOOD LANE ARE ACCEPTABLE. PLEASE
SUBMIT THE ORIGINAL LETTER(S) WITH SIGNATURES TO THIS
OFFICE FOR APPROVAL AND DOCUMENTATION.
4. WE OFFER, BUT NOT LIMITED TO, THE FOLLOWING COMMENTS:
A) PLEASE BE SURE TO LABEL THE CENTERLINE WITH STATIONS
AT EVERY 100' ON THE EC PHASE I AND PHASE II.
B) BE SURE TO LABEL ALL THE EXISTING AND PROPOSED
CONTOURS WITH ELEVATIONS (I.E. THE ST1 THRU ST3, LOT
FILLING AND GRADING ON LOTS 29 THRU 31, ETC.). REFLECT
THE CHANGES ON THE EC PHASE I/PHASE II.
C) THE PROPOSED LOT FILLING AND GRADING SPECIFIED ON
LOTS 1 THRU 4 DO NOT APPEAR TO DRAIN TO ANY SEDIMENT
TRAPS. PLEASE ADDRESS.
IN ADDITION, IT IS UNCLEAR IF THE TEMPORARY PIPE 15" RCP
AT 1.5% WOULD DIVERT CLEAN WATER, SINCE THE DIVERSION
DIKE AND THE SUPER SILT FENCE ARE CURRENTLY BLOCKING
THIS PIPE.
BE SURE IF A TEMPORARY PIPE WOULD BE SPECIFIED THEN
STEPS FOR THE INSTALLATION AND REMOVAL OF THIS PIPE
SHOULD BE PROVIDED IN THE NARRATIVE SEQUENCE OF
CONSTRUCTION.
IN ADDITION, THE DRAINAGE AREAS THAT DRAIN TO THIS PIPE
SHOULD BE CLEARLY SHOWN ON THE PLANS. IF UNDISTURBED
AREAS WOULD DRAIN TO THIS PIPE, THEY SHOULD BE LABELED
AS "CLEAR WATER". INVERTS IN/OUT SHOULD BE PROVIDED ON
THE PLANS AND SUPPORT 10-YEAR CULVERT CALCULATIONS
SHOULD BE SUBMITTED FOR APPROVAL AND DOCUMENTATION. BE
SURE CULVERT INLET PROTECTION AND OUTLET PROTECTION HAVE
BEEN SPECIFIED TO ALL TEMPORARY PIPES.
PLEASE CONSIDER PROVIDING A DIVERSION DIKE TO RUN ALONG
THE FUTURE RIGHT-OF-WAY PERTINENT VERNEHAM DRIVE TO
DIVERT UPSTREAM UNDISTURBED AREAS STARTING FROM THE HIGH
POINT 276.00 CONTOUR-ELEVATION AND CONTINUE UNTIL IT
REACHES THE INTERSECTION OF VERNEHAM DRIVE AND FAWNWOOD
LANE. REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
D) PLEASE LABEL THE STRUCTURES OF THE PROPOSED STORM
SEWERS WITH NUMBERS. REFLECT THE CHANGES ON THE EC PHASE
II.
E) THESE ARE IN REGARDS TO THE ST3:
E.1) A SIMILAR SITUATION EXISTS TO THE PROPOSED
TEMPORARY PIPE 15" RCP AT 2.5% LOCATED NEAR LOT 10. IT
IS UNCLEAR HOW THIS TEMPORARY PIPE WOULD DIVERT
UNDISTURBED AREAS SINCE THE SUPER SILT FENCE IS
CURRENTLY BLOCKING THIS PIPE.
IN ADDITION, BE SURE IF A TEMPORARY PIPE WOULD BE
PROVIDED TO INCLUDE STEPS IN THE NARRATIVE OF SEQUENCE
OF CONSTRUCTION FOR THE INSTALLATION/REMOVAL OF THIS
PIPE AND INCLUDE PIPE INFORMATION ON THE EC PHASE I/II
(I.E. INVERTS IN/OUT, DIAMETER, ETC.).
FURTHERMORE, THE CIP/OP CURRENTLY IS MISSING FROM THESE
TEMPORARY PIPES. REFLECT THE CHANGES ON THE EC PHASE
I/PHASE II.
E.2) PLEASE PROVIDE A DETAIL OF CULVERT INLET PROTECTION
AND OUTLET PROTECTION ON THE EC PLANS.
E.3) PLEASE CONSIDER RELOCATING THE ST3 NEAR THE NATURAL
LOW IN THE PROXIMITY OF LOTS 16/17. A TEMPORARY PIPE
FROM STR. 30 TO THE ST3 SHOULD BE CONSIDERED.
IN ADDITION, THE SWALE REQUESTED/PROPOSED ON LOTS 7 AND
9 SHOULD BE CONSTRUCTED IN THE EC PHASE I TO DIVERT SOME
AREA TO THE ST2. BE SURE TO SPECIFY CHECK DAMS ALONG
THESE SWALES AND PROVIDE A NOTE IN THE PHASE I/PHASE II
SEQUENCE OF CONSTRUCTION FOR THE INSTALLATION OF THESE
SWALES. BE SURE TO ADJUST THE LIMITS OF CLEARING TO
INCLUDE THESE SWALES.
CONSEQUENTLY, THE NEED TO DIVERT THE AREA FROM LOTS 9
THRU 12 WON'T BE REQUIRED SINCE FROM AN IN-HOUSE CHECK
APPEARS NOT TO EXCEED OVER 3 ACRES IF THEY DRAIN TO ST2.
PLEASE CONSIDER REMOVING THE DIVERSION DIKE, THE
TEMPORARY SUPER SILT FENCE AND TEMPORARY PIPE SPECIFIED
IN THE VICINITY OF LOTS 9 THRU 12. A FURTHER DISCUSSION
IS RECOMMENDED.
IN ADDITION, REVISE THE ST2 TO ACCOUNT FOR ADDITIONAL
DRAINAGE AREAS. REFLECT THE CHANGES ON THE EC PHASE
I/PHASE II.
E.4) PLEASE PROVIDE SILT FENCE TO SURROUND A PORTION OF
THE CUL-DE-SAC ON THE SOUTHERN SIDE PERTINENT TO
FREEBRIDGE ROAD AND CONTINUE UNTIL IT REACHES THE ST3.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
E.5) ADDITIONAL SILT FENCE MAY BE NEEDED FROM THE
SOUTHERN-EASTERN SIDE OF FREEBRIDGE ROAD TO DIVERT
DISTURBED AREAS TO THE ST3. REFLECT THE CHANGES ON THE
EC PHASE I/PHASE II.
F) PLEASE PROVIDE SILT FENCE ON THE SOUTHERN SIDE AND
WITHIN SANITARY SEWER EASEMENT STARTING AT THE END OF
THE CUL-DE-SAC ON FREEBRIDGE ROAD TO THE MH#E10. REFLECT
THE CHANGES ON THE EC PHASE II.
IN ADDITION, REVISE THE LIMITS OF CLEARING TO EXTEND THE
LIMITS TO MH#E10.
G) PLEASE PROVIDE SUPER SILT FENCE FOR THE PORTION OF
THE DESIGNED CONSERVATION EASEMENT THAT IS LOCATED NEAR
SEDIMENT TRAPS AND STOCKPILES. THE SUPER SILT FENCE
SHOULD BE LOCATED ALONG THE LIMITS OF THE DESIGNED
CONSERVATION EASEMENT. REFLECT THE CHANGES ON THE EC
PHASE I/PHASE II.
H) BE SURE THAT THE DISTURBED AREAS PERTINENT TO THE
ROAD CONSTRUCTION ARE DRAINING TO SEDIMENT TRAPS. PLEASE
CONSIDER THE FOLLOWING:
H.1) A TRAP SHOULD BE PROVIDED NEAR THE CONSTRUCTION
ENTRANCE ON RIGHT SIDE OF FAWNWOOD LANE. IN ADDITION,
PROVIDE SILT FENCE ON BOTH SIDES IN THE PROXIMITY OF
STATIONS 10+50 TO 12+40. THE SILT FENCE ON THE LEFT SIDE
SHOULD BE ADJUSTED TO INCLUDE THE SEDIMENT TRAP MENTION
IN THE PREVIOUS PARAGRAPH.
ADDITIONALLY, PROVIDE RIGHT-OF-WAY DIVERSION IN THE
PROXIMITY OF STATION 10+40 ON FAWNWOOD LANE TO DIVERT
LOOSE SEDIMENT FROM THE ROAD CONSTRUCTION TO THE
SEDIMENT TRAP REQUESTED IN ITEM H.1. REFLECT THE CHANGES
ON THE EC PHASE I/PHASE II.
H.2) BE SURE TO INCLUDE A DETAIL OF RIGHT-OF-WAY
DIVERSION ON THE EC PLANS.
H.3) PLEASE PROVIDE A SEDIMENT TRAP AT THE END OF
FAWNWOOD LANE IN THE PROXIMITY OF STATION 14+31.12.
INCLUDE DRAINAGE AREAS INTERCEPTED BY THIS TRAP AND
DIMENSIONS OF THIS DEVICE.
IN ADDITION, PROVIDE SILT FENCE TO BE LOCATED ON BOTH
SIDES OF THIS ROAD FAWNWOOD LANE STARTING IN THE
PROXIMITY OF STATION 13+00 TO THIS SEDIMENT TRAP
REQUESTED IN THE PREVIOUS PARAGRAPH.
FURTHERMORE, PROVIDE A NOTE ON THE PHASE II SEQUENCE OF
CONSTRUCTION FOR THE CONVERSION OF THE TRAPS REQUESTED
AT THE END OF THE ROAD CONSTRUCTION ON FAWNWOOD LANE AND
FREEBRIDGE ROAD TO BE TEMPORARY ENERGY DISSIPATER. IT
SHOULD STATE THAT ONCE THE UPSTREAM AREAS ARE COMPLETELY
STABILIZED AND WITH APPROVAL OF THE COUNTY INSPECTION,
THESE TRAPS CAN BE CLEANED OFF SEDIMENTS AND FILLED WITH
RIPRAP AS PER THIS APPROVED PLAN, ETC.
H.4) SIMILARLY, PLEASE PROVIDE A SEDIMENT TRAP AT THE
END OF THE ROAD CONSTRUCTION ON FREEBRIDGE ROAD IN THE
PROXIMITY OF STATION 26+00 AND PROVIDE SILT FENCE ON
BOTH SIDE OF THE ROAD TEMPLATE STARTING IN THE PROXIMITY
OF STATION 24+20.00 UNTIL THIS SILT FENCE REACHES THIS
TRAP REQUESTED IN THE PREVIOUS PARAGRAPH.
BE SURE THE SILT FENCE LOCATED ON THE LEFT SIDE WOULD
INCLUDE THE TEMPORARY STOCKPILE. REFLECT THE CHANGES ON
THE EC PHASE I/II.
IN ADDITION, PROVIDE SEDIMENT TRAP DIMENSION/DRAINAGE
AREAS.
H.5) BE SURE TO UPDATE THE SEDIMENT TRAP TABLE (SHEET
C2.6) TO INCLUDE THE TRAPS REQUESTED IN THIS REVIEW WITH
PERTINENT INFORMATION.
I) PLEASE PROVIDE A NOTE FOR THE REMOVAL OF SEDIMENT
TRAPS LOCATED ON THE PROPOSED LOTS STATING,
"UNSUITABLE/SATURATED SOILS FROM THE BOTTOM OF THE
SEDIMENT TRAPS SHOULD BE REMOVED PRIOR TO THE PLACEMENT
OF STRUCTURAL FILL. THE AREA SHALL BE RECLAIMED TO MATCH
EXISTING GRADE OR PROPOSED GRADE BEING SURE TO CREATE
POSITIVE LOT DRAINAGE. FILL SHOULD BE COMPACTED IN 6"
LIFT." IN ADDITION, ANNOTATE LOTS 16, 21, 34, ETC. WITH
"NBP". REFLECT THE CHANGES ALL APPLICABLE SHEETS.
J) PLEASE PROVIDE SUPER SILT FENCE TO SURROUND THE
PROPOSED LOT FILLING AND GRADING PROPOSED ON LOTS 29
THRU 31. IN ADDITION, PROVIDE 10' IN THE LOW AREA OF THE
SUPER SILT FENCE. THE BREAK MUST BE BACKFILLED WITH
STONE WITHIN 1' OF THE OF THE SUPER SILT FENCE TO SERVE
AS OVERFLOW.
ADDITIONALLY, SPECIFY A SMALL EXCAVATED PIT TO BE
LOCATED ON THE UPSTREAM SIDE OF THE 10' BREAK BACKFILLED
WITH STONE. REFLECT THE CHANGES ON THE EC PHASE I.
K) PLEASE PROVIDE CULVERT INLET PROTECTION TO THE
EXISTING CULVERT STR. E5-06 LOCATED UNDER VERNEHAM
DRIVE. REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
L) PLEASE LABEL VERNEHAM DRIVE ON SHEETS C2.1, C2.3,
ETC.
M) PLEASE PROVIDE SUPER SILT FENCE IN A HORSESHOE
CONFIGURATION PRIOR TO THE INSTALLATION OF THE OUTFALL
PIPE STRUCTURES 23/31/39/ETC. REFLECT THE CHANGES ON THE
EC PHASE II.
5. IF TIMBERING IS REQUIRED ON THE PROJECT, IT SHOULD BE
INCORPORATED INTO THE EROSION CONTROL PLAN / NARRATIVE AND
SHOULD NOT BEGIN UNTIL AFTER THE ISSUANCE OF A LAND
DISTURBANCE PERMIT AND THE INSTALLATION OF THE APPROVED
EROSION CONTROL DEVICES.
======= CBPA =======
1. THERE APPEAR DISCREPANCIES IN THE AREAS USED FOR THE
PROJECT SITE, OPEN SPACE, RIGHT-OF-WAY, ETC. WHEN COMPARING
THE INFORMATION USED IN THE WORKSHEET A CALCULATIONS WITH
THE CONSTRUCTION PLANS.
BASED ON THE CONSTRUCTION PLANS THE PROJECT SITE AREA
APPEARS TO BE 18.86 ACRES AS OPPOSED TO 18.93 ACRES USED IN
WORKSHEET A CALCULATIONS. REVISE EITHER THE CONSTRUCTION
PLANS AND/OR THE WORKSHEET A CALCULATIONS TO ENSURE THE
AREAS MATCH.
THE AREA IN THE LOTS AND THE AREA IN THE OPEN SPACE APPEAR
TO BE 11.98 ACRES/4.19 ACRES RESPECTIVELY BASED ON THE
CONSTRUCTION PLANS AS OPPOSED TO 11.99 ACRES/4.25 ACRES
USED IN THE WORKSHEET A CALCULATIONS. REVISE EITHER THE
CONSTRUCTION PLANS IN THE SITE AREA AND/OR THE WORKSHEET A
CALCULATIONS TO ENSURE THE AREAS MATCH.
2. IT APPEARS THE SUMMATION IN STEP 2 OF WORKSHEET A
CALCULATIONS FOR LOT AREA + OPEN SPACE - SIDEWALK SHOULD
INCLUDE THE AREA IN THE RIGHT-OF-WAY, WHICH WAS OMITTED. IT
SHOULD HAVE USED 18.77 ACRES AS OPPOSED TO 16.24 ACRES.
CONSEQUENTLY, THE LPOST APPEARS TO BE 10.71 LBS/YR AS
OPPOSED TO 9.46 LBS/YR. REVISE ACCORDINGLY.
THEREFORE, THE REMOVAL REQUIREMENT APPEARS TO BE 2.22
LBS/YR IN LIEU OF 0.94 LBS/YR. SUBMIT REVISED WORKSHEET A
CALCULATIONS FOR FURTHER REVIEW AND/OR APPROVAL AND REVISE
THE MS-4/CBPA TABLE (SHEET CBPA) TO REFLECT THE CHANGES.
3. THESE ARE IN REGARDS TO THE CBPA CALCULATIONS TABLE
(SHEET CBPA):
A) PLEASE REVISE THE TOTAL AREA FOR THE SITE FOR THIS
SECTION, WHICH APPEARS TO BE 18.86 ACRES AS OPPOSED TO
18.93 ACRES. REVISE ACCORDINGLY.
B) PLEASE INCLUDE BEFORE THIS SECTION HARPERS MILL SOUTH
PHASE SECTION 2 + VERNEHAM DR. WITH PERTINENT
INFORMATION. IT APPEARS THE SITE AREA TO BE 21.07 ACRES
AND THE IMPERVIOUS ACRES TO BE 5.07 ACRES.
4. PLEASE ADD IN THE CBPA NOTES (SHEET C1.0) THAT THIS
PROJECT COMPLY WITH THE VSMP TECHNICAL CRITERIA PART IIC.
======= ROAD AND DRAINAGE =======
1. THIS OFFICE WAS NOT ABLE TO PERFORM A FIELD INSPECTION.
ADDITIONAL COMMENTS MAY ARISE AFTER PERFORMING A SITE
INSPECTION IF INDICATED BY THE EXISTING CONDITIONS.
2. PLEASE ADDRESS TENTATIVE CONDITION #14, WHICH STATES,
"BASED ON THE FINDINGS OF A QUALIFIED GEOTECHNICAL
PROFESSIONAL, THE CONSTRUCTION PLANS SHALL SHOW THE
LOCATION OF ALL AREAS OF FORMER MINING ACTIVITY. IF THE
LAND AREA COVERED BY THE CONSTRUCTION PLANS CONTAINS NO
FORMER MINING ACTIVITY, A STATEMENT TO THAT EFFECT WILL BE
INCLUDED ON THE CONSTRUCTION PLANS. IF THE LAND AREA
COVERED BY THE CONSTRUCTION PLANS DOES HAVE MINING
ACTIVITY, A STATEMENT WILL BE INCLUDED WHICH INDICATES THAT
THE FORMER MINING ACTIVITY AS SHOWN ON THE CONSTRUCTION
PLANS IS THE FULL EXTEND OF MINING ACTIVITY WITHIN THE AREA
COVERED BY THE CONSTRUCTION PLANS. THE QUALIFIED
PROFESSIONAL WILL ALSO INDICATE THOSE LOTS WHERE
GEOTECHNICAL BORINGS MUST BE PERFORMED IN ORDER TO INSURE
NO HOUSE IS BUILT OVER AREAS AFFECTED BY FORMER MINING
ACTIVITY. IF APPLICABLE, RECOMMENDED SETBACK DISTANCES FROM
AREAS OF FORMER MINING ACTIVITY SHALL BE SPECIFIED." IF
APPLICABLE TENTATIVE CONDITION #15 WOULD APPLY.
3. AS A REMINDER OF TENTATIVE CONDITION #16, WHICH STATES,
"THE COST FOR CLEANOUT OF SEDIMENT DEPOSITS FROM A
CERTIFIED UPPER SWIFT CREEK REGIONAL BMP FACILITY WILL BE
BORNE SOLELY BY THE PARTIES DEVELOPING LAND WITHIN THE
WATERSHED OF THE BMP FROM WHICH THE EROSION PRODUCED THE
SEDIMENT OCCURRED UNTIL SUCH TIME AS ALL OF THE AREAS OF
THIS DEVELOPMENT THAT DRAIN TO THE FACILITY ARE COMPLETED
AND ACCEPTED INTO THE STATE SYSTEM."
4. IN REGARDS TO THE 10-YEAR PRE/POST REQUIREMENTS AT THE
END OF THE ROAD CONSTRUCTION ON FREEBRIDGE ROAD/FAWNWOOD
LANE FOR FLOOD PROTECTION.
PLEASE SUBMIT THE 10-YEAR PRE-DEVELOPMENT DISCHARGE WITH
SUPPORT DATA (I.E. DRAINAGE AREAS, RUNOFF COEFFICIENT, TIME
OF CONCENTRATION, ETC.) AND THE 10-YEAR POST-DEVELOPMENT AT
THE SAME LOCATION WITH PERTINENT INFORMATION FOR REVIEW
AND/OR APPROVAL.
IF THE 10-YEAR POST EXCEEDS BY A FEW TENTHS DIFFERENCE FROM
THE PRE-DEVELOPMENT DISCHARGE, THE ENERGY DISSIPATER PIT
SHOULD BE ANALYZED (I.E. THE VOLUME VOID RATIO) TO
DEMONSTRATE SOME CONTAINMENT REDUCING THE 10-YEAR POST-
DEVELOPED DISCHARGE. A FURTHER DISCUSSION IS RECOMMENDED.
IN ADDITION, EVEN IF THE 100-YEAR FLOODPLAIN LIMITS HAVE
BEEN ESTABLISHED ALONG THESE NATURAL DRAINAGEWAYS LOCATED
IN THE VICINITY OF LOTS 26/27 AND 19/20, THESE NATURAL
DRAINAGEWAYS CONTINUE TO OFFSITE PROPERTY WHERE THE 100-
YEAR FLOODPLAIN LIMITS HAVE NOT BEEN ESTABLISHED. PLEASE
EXPLAIN HOW YOU PROPOSE TO ADDRESS FLOOD PROTECTION? THIS
CONCERN MUST BE ADDRESSED PRIOR TO CONSTRUCTION PLAN
APPROVAL.
5. PLEASE REVISE THE NAME OF THE RECEIVING WATERS BODIES TO
BE "DRY CREEK" AS OPPOSED TO SWIFT CREEK ON SHEET C1.0.
6. PLEASE SPECIFY THE TOTAL IMPERVIOUS AREAS TO USE FOR
PRO-RATA CONTRIBUTION IN ITEM #7 UNDER GENERAL NOTES (SHEET
C1.0), WHICH APPEARS TO BE 1.95 ACRES.
7. PLEASE REVISE THE NUMBERING OF TENTATIVE CONDITION IN
ITEM 13 UNDER GENERAL NOTES (SHEET C1.0) TO BE #4 AS
OPPOSED TO #25. REVISE ACCORDINGLY.
8. SIMILARLY, THE NUMBERING FOR TENTATIVE CONDITION IN ITEM
14 UNDER GENERAL NOTES (SHEET C1.0) APPEARS TO BE #10 AS
OPPOSED TO #33. REVISE ACCORDINGLY.
9. PLEASE EXTEND THE 50' RIGHT-OF-WAY LIMITS TO INCLUDE A
PORTION OF THE TEMPORARY TURNAROUND EASEMENT ON FREEBRIDGE
ROAD IN THE PROXIMITY OF STATION 29+85.00. IN ADDITION,
ADJUST THE TEMPORARY TURNAROUND EASEMENT TO BE OUTSIDE THE
LIMITS OF THE RIGHT-OF-WAY.
10. PLEASE INDICATE WITH ARROWS, THE DIRECTION OF FLOW ALONG
THE NATURAL DRAINAGEWAYS/WETLAND AREAS, ALL GUTTERS, SWALES,
ETC. REFLECT THE CHANGES ON ALL PLANS (I.E. EC PLANS, ROAD
PLANS, GRADING PLANS, DRAINAGE PLANS, ETC.).
11. PLEASE PROVIDE A CROSS-HATCHED PATTERN FOR THE REMOVAL
OF THE DIRT ROAD THAT CROSSES MULTIPLE LOTS (I.E. LOTS 1,
28, 29, 32 THRU 34, ETC.). REFLECT THE CHANGES ON ALL
APPLICABLE SHEETS.
IN ADDITION, PROVIDE A LEGEND FOR THE CROSS-HATCHED PATTERN
FOR THE REMOVAL OF THIS DIRT PATH ON THE PLANS.
12. PLEASE BE SURE THE FILL SLOPE(S) OUTSIDE THE RIGHT-OF-
WAY LIMITS ARE ENCLOSED IN A "VARIABLE WIDTH SLOPE EASEMENT
FOR VDOT MAINTENANCE" (I.E. IN THE PROXIMITY OF STATION
11+50 AND 17+00 ON FREEBRIDGE ROAD, ETC.). REFLECT THE
CHANGES ON ALL APPLICABLE SHEETS.
13. PLEASE EXTEND THE RIPRAP SPECIFIED AT THE END OF THE
TEMPORARY CUL-DE-SAC ON FREEBRIDGE RAOD TO THE CURB CUT
OPENING. REFLECT THE CHANGES ON ALL APPLICABLE SHEETS.
14. PLEASE ANNOTATE LOTS 1, 6, 31 THRU 34, ETC. WITH "MCS"
(MINIMUM CRAWL SPACE). REFLECT THE CHANGES ON ALL APPLICABLE
SHEETS.
15. PLEASE RELOCATE THE PROPOSED GRASS SWALE SPECIFIED ON
LOT 32 TO BE LOCATED ON LOT 31 ON THE HIGH SIDE OF THIS LOT
AND 5' OFF THE PROPERTY LINE PERTINENT LOTS 31/32.
16. SIMILARLY, PLEASE RELOCATE THE GRASS SWALE SPECIFIED ON
LOT 34 TO BE LOCATED ON LOT 33 AND 5' OFF THE PROPERTY LINE
PERTINENT TO LOTS 33/34. REFLECT THE CHANGES ON ALL
APPLICABLE SHEETS.
17. PLEASE SPECIFY A GRASS SWALE OF 5:1 SIDE SLOPE AND 5'
OFF THE PROPERTY LINE PERTINENT TO LOTS 7 TO INTERCEPT
UPSTREAM LOT DRAINAGE. THE SWALE SHOULD START AT GRADE
INCREASING IN DEPTH AND FLATTEN THE SIDE SLOPES PRIOR TO
REACHING THE LIMITS OF THE RIGHT-OF-WAY TO ENCOURAGE SHEET
FLOW. ANNOTATE LOT 7 WITH "NBP". REFLECT THE CHANGES ON ALL
APPLICABLE SHEETS.
18. PLEASE ELIMINATE A PORTION OF THE PROPOSED GRASS SWALE
SPECIFIED TO CROSS LOTS 11 AND 9 TO START THE SWALE ON LOT
9. IN ADDITION, REMOVE THE ANNOTATION OF "NBP" ON LOT 11.
REFLECT THE CHANGES ON ALL APPLICABLE SHEETS.
IN ADDITION, BE SURE TO PROVIDE A TYPICAL GRASS SWALE OF 5:1
SIDE SLOPE FOR THIS SWALE LOCATED ON REAR OF LOT 9.
19. A GRASS SWALE OF 5:1 SIDE SLOPE SHOULD BE SPECIFIED ON
LOT 15 AND 5' OFF THE PROPERTY LINE PERTINENT TO LOTS 14/15.
ANNOTATE LOT 15 WITH "NBP". REFLECT THE CHANGES ON ALL
APPLICABLE SHEETS.
20. PLEASE REVISE THE OVERALL LOT FILLING & GRADING PROPOSED
ON LOTS 1 THRU 4 TO START THE GRASS SWALE OF 5:1 SIDE SLOPE
ON THE REAR OF LOT 3 AND CONTINUE THIS SWALE UNTIL REACHES
STR. 9. IN ADDITION, ELIMINATE THE SWALES PROVIDED ON THE
REAR OF LOT 4, BETWEEN LOTS 1/2 AND BETWEEN LOTS 3/4.
BE SURE TO PROVIDE A TYPICAL GRASS SWALE OF 5:1 SIDE SLOPE
FOR THE SWALE SPECIFIED ON THE REAR OF LOT 3. REFLECT THE
CHANGES ON ALL APPLICABLE SHEETS.
IN ADDITION, ANNOTATE WITH "MCS" (MINIMUM CRAWL SPACE) LOTS
1 THRU 4. REFLECT THE CHANGE ON ALL APPLICABLE SHEETS.
FURTHERMORE, REMOVE THE 16' DRAINAGE EASEMENT SPECIFIED
BETWEEN LOTS 1 THRU 4, SINCE THE DITCH LOCATED ON LOTS 1/4
SHOULD HAVE BEEN REMOVED AS REQUESTED.
20. IT APPEARS SEVERAL OF THE WORKSHEET CALCULATIONS LABELED
AS SWALE (I.E. LOTS 1 & 2, 3, 8, 30, 32, 34, ETC.) DO NOT
SHOW ANY CONTAINMENT AND/OR A TRIANGULAR V-CHANNEL OF 5:1
SIDE SLOPE WAS NOT USED.
AS A REMINDER, GRASS SWALE IN THE LOTS MUST BE TRIANGULAR
SWALES OF 5:1 SIDE SLOPE AND CALCULATIONS FOR SWALES ARE NOT
REQUIRED.
FOR FUTURE REFERENCE, PROPOSED DITCHES THAT CROSS MULTIPLE
LOTS ARE REQUIRED TO BE IN COUNTY DRAINAGE EASEMENT WITH
WELL-DEFINED V-DITCH OF 3:1 SIDE SLOPE. 10/100-YEAR DITCH
CALCULATIONS MUST BE PROVIDED AND PROFILES, ETC. ARE
REQUIRED TO BE ON THE PLANS. BE SURE TO USE MANNING
ROUGHNESS COEFFICIENT ALONG THE GRASS DITCH OF 0.05.
22. PLEASE SPECIFY A DI-6 WITH MINIMUM 2' CONCRETE GUTTER AT
STR. 37 AS OPPOSED TO MH. PROVIDE THE OPENING ORIENTATION TO
THE WEST. REFLECT THE CHANGES ON THE PLANS, STORM SEWER
DESCRIPTION, PROFILES AND COMPUTATION SHEETS.
IN ADDITION, PROVIDE A DI-6 WITH MINIMUM 2' CONCRETE GUTTER
DETAIL ON THE PLANS.
23. PLEASE LABEL THE 25' BUILDING SETBACK OFF THE 100-YEAR
BACKWATER ON LOT 30. REFLECT THE CHANGES ON ALL APPLICABLE
SHEETS.
24. THESE ARE IN REGARDS TO THE DRAINAGE AREAS PLAN (SHEETS
C5.0 AND C5.1):
A) THE ONSITE DRAINAGE AREAS MAP MUST BE SHOWN IN A
SCALE 1"=50'. PLEASE REVISE ACCORDINGLY.
B) PLEASE SHOW THE PROPOSED CONTOURS ALONG THE PROPOSED
ROADS AND WITHIN THE LOT AREA TO VERIFY DRAINAGE
PATTERNS AND/OR BREAKS.
C) BE SURE TO LABEL ALL THE EXISTING AND PROPOSED
CONTOURS WITH ELEVATIONS ON ALL APPLICABLE SHEETS.
D) SHOW/LABEL PROPOSED SWALES/DITCHES AND REVISE
DRAINAGE AREAS TO DEPICT THESE FEATURES.
E) SHOW/LABEL THE 100-YEAR BACKWATER LIMITS/ELEVATIONS.
F) SHOW/LABEL THE 100-YEAR FLOODPLAIN LIMITS AND THE
100-YEAR SECTION-LOCATIONS ALONG THE NATURAL
DRAINAGEWAYS/WETLAND AREAS ON SHEETS C3.0, C3.1, C5.0,
C5.1, ETC.
G) THERE ARE SEVERAL SHEETS THAT THE STATIONING ALONG
THE CENTERLINE OF THE PROPOSED ROADS WAS OMITTED. PLEASE
BE SURE TO LABEL THE CENTERLINE WITH STATIONS AT EVERY
100' ALONG ALL PROPOSED ROAD ON SHEETS C2.0 THRU C2.3,
C5.0 THRU C5.3, ETC. REVISE ACCORDINGLY.
H) SHOW/LABEL RUNOFF COEFFICIENT FOR EACH DRAINAGE AREAS
ON THIS SHEET.
25. THESE ARE IN REGARDS TO THE 100-YEAR FLOODPLAIN ANALYSIS
PLAN (SHEET 5.3):
A) THIS OFFICE WAS NOT ABLE TO LOCATE A COMPLETE
HYDRAULIC/HYDROLOGIC CALCULATIONS USED TO ESTABLISH THE
100-YEAR FLOODPLAIN PERTINENT TO SECTIONS-LOCATIONS A-A
THRU U-U. ONLY THE DRAINAGE AREAS, TIME OF
CONCENTRATION(S), HYDRAULIC ANALYSIS OF THE NATURAL
CHANNEL, ETC. WERE PROVIDED. THE RUNOFF COEFFICIENT,
CALCULATED 100-YEAR DISCHARGE(S), INTENSITIES, ETC. WERE
OMITTED FROM THE SUBMITTAL PACKAGES. PLEASE ADDRESS.
B) THE MANNING ROUGHNESS COEFFICIENT SHOWN FOR THE
FLOODPLAIN SECTIONS A-A THRU U-U IS TOO LOW FOR THE
OVERALL CROSS-SECTION. THE MAIN CHANNEL MAYBE AT A
0.045, BUT THE OVERBANK AREAS USUALLY FALL INTO THE
0.065-0.08. PLEASE REVISE ACCORDINGLY.
C) THE DRAINAGE AREAS AT SECTION K-K APPEARS GREATER
THAN 3 ACRES IN LIEU OF 2.32 ACRES. PLEASE REVISE THE
PLANS AND CALCULATIONS ACCORDINGLY.
D) PLEASE CLEARLY SHOW/LABEL THE PROPOSED STORM SEWER
SYSTEM WITH PERTINENT INCREMENTAL DRAINAGE AREAS FOR
THIS SECTION ON THIS SHEET.
E) IT APPEARS THE INCREMENTAL DRAINAGE AREAS PERTINENT
TO OUTFALL STR. 23 WERE NOT INCLUDED IN THE DRAINAGE
AREAS PERTINENT TO SECTION M-M. PLEASE SUBMIT REVISED
100-YEAR DISCHARGE AND WORKSHEET M-M CALCULATIONS FOR
FURTHER REVIEW AND/OR APPROVAL.
IN ADDITION, SUBMIT REVISED 100-YEAR DISCHARGE/WORKSHEET
SECTION N-N, O-O THRU R-R TO INCLUDE ADDITIONAL
INCREMENTAL DRAINAGE AREAS FROM SECTION M-M PER OUTFALL
STR. 23 AND FROM D-D PER OUTFALL STR. 31.
FURTHERMORE, REVISE THE LIMITS OF THE 100-YEAR
FLOODPLAIN/100-YEAR WSE'S ON THE PLAN VIEWS TO REFLECT
THE CHANGES.
F) SIMILARLY, THE INCREMENTAL DRAINAGE AREAS PERTINENT
TO THE OUTFALL STR. 31 WERE NOT INCLUDED IN THE SECTION
D-D. PLEASE SUBMIT REVISED 100-YEAR DISCHARGE/WORKSHEET
D-D CALCULATIONS FOR FURTHER REVIEW AND APPROVAL.
CONSEQUENTLY, REVISE 100-YEAR DISCHARGE/WORKSHEET G-G
THRU J-J TO ACCOUNT FOR THIS ADDITIONAL INCREMENTAL
DRAINAGE AREAS. AS APPLICABLE, REVISE THE PLANS AND
COMPUTATION SHEETS TO REFLECT THE CHANGES.
G) PLEASE SHOW THE RUNOFF COEFFICIENT FOR EACH DRAINAGE
AREAS ON THE PLAN VIEW.
H) BE SURE ALL THE EXISTING CONTOURS HAVE BEEN LABELED
WITH ELEVATIONS (I.E. ON THE WESTERN AND EASTERN SIDE OF
PROJECT.
I) PLEASE SHOW THE PROPOSED GRADING ALONG THE ROADS AND
THE AREA IN THE LOTS, ETC. TO VERIFY DRAINAGE PATTERNS
AND/OR DRAINAGE BREAKS.
IN ADDITION, SHOW/LABEL PROPOSED SWALES/DITCHES ON THIS
SHEET AND REVISE DRAINAGE AREAS AS APPLICABLE TO ACCOUNT
FOR THESE FEATURES. FOR EXAMPLE, A SWALE HAS BEEN
REQUESTED ON LOT 7, THIS AREA SHOULD BE ADDED TO THE
OUTFALL STR. 23 AND THE LIMITS OF DRAINAGE AREAS SHOULD
BE REVISED TO DEPICT THIS SWALE. A FURTHER DISCUSSION
MAY BE HELPFUL.
J) PLEASE LABEL THE 100-YEAR BACKWATER WITH PERTINENT
ELEVATION IN THE VICINITY OF LOTS 29/30.
K) LABEL THE 100-YEAR FLOODPLAIN ALONG THE 100-YEAR
FLOODPLAIN LIMITS.
L) PLEASE SHOW/LABEL THE 25' BUILDING SETBACK OFF THE
LIMITS OF WETLANDS AND/OR THE 100-YEAR FLOODPLAIN,
WHICHEVER IS MOST RESTRICTIVE ON LOTS 15, 21 THRU 23.
REFLECT THE CHANGES ON ALL APPLICABLE SHEETS (I.E.
SHEETS C3.0, C3.1, C5.0 THRU C5.3, ETC.).
IN ADDITION, IT APPEARS THE 100-YEAR FLOODPLAIN LIMITS
ARE ENCROACHING INTO LOTS 15 AND 20. THEREFORE, SPECIFY
MFF(FP)'S ON THESE LOTS TO BE 1' ABOVE THE 100-YEAR
FLOODPLAIN ELEVATIONS. REFLECT THE CHANGES ON ALL
APPLICABLE SHEETS (I.E. ROAD PLANS, GRADING PLANS,
FLOODPLAIN PLANS, ETC.).
M) PLEASE SPECIFY "MFF" MINIMUM FINISH FLOOR ON LOTS 29
AND 30 TO BE 1' ABOVE THE MOST RESTRICTIVE OF ROAD SAG
OR 100-YEAR BACKWATER ELEVATION. IN THIS CASE, IT
APPEARS TO BE THE ROAD SAG PERTINENT TO VERNEHAM DRIVE.
THESE LOTS SHOULD BE LABELED AS MFF(SAG)=______.
26. THESE ARE IN REGARDS TO THE FLOODPLAIN X-SECTIONS
(SHEETS C5.40 AND C5.50):
A) PLEASE PROVIDE THE 100-YEAR DISCHARGE, AVERAGE
MANNING COEFFICIENT, 100-YEAR DEPTH, % SLOPE, V100, ETC.
FOR X-SECTIONS A-A THRU T-T, ETC.
27. THESE ARE IN REGARDS TO THE PROFILES:
A) PLEASE REVISE THE STR. 19 TO STR. 23 PROFILE (SHEET
C4.4) TO SHOW THE PIPE STR. 22, WHICH IS CURRENTLY
MISSING IN THIS VIEW.
IN ADDITION, EXTEND THE PROFILE/EXISTING GROUND WITH
SUFFICIENT DISTANCE BEYOND THE LIMITS OF THE WETLANDS TO
ENSURE DAYLIGHT.
B) SIMILARLY, PLEASE REVISE STR. 33 TO STR. 39 PROFILE
(SHEET C4.4) TO SHOW EXISTING GROUND BEYOND THE LIMITS
OF WETLANDS TO ENSURE DAYLIGHT.
C) A SIMILAR SITUATION EXISTS WITH STR. 29 TO STR. 31
PROFILE (SHEET C4.3), PLEASE EXTEND THE PROFILE WITH
SUFFICIENT DISTANCE BEYOND THE LIMITS OF THE WETLANDS TO
SHOW THE EXISTING GROUND AND VERIFY DAYLIGHT.
D) BE SURE TO SHOW PROPOSED GRADE FROM THE
UPSTREAM/DOWNSTREAM OF THE USCW END TREATMENT TYING BACK
TO THE EXISTING GROUND FOR ALL APPLICABLE PROFILES (I.E.
STR. 33 TO 39 PROFILE, STR. 19 TO STR. 23 PROFILE, STR.
29 TO STR. 31 PROFILE, ETC.).
E) PLEASE BE SURE TO SHOW/LABEL THE 100-YEAR FLOODPLAIN
LIMITS ON ALL APPLICABLE PROFILES (I.E. STR. 19 TO STR.
23 PROFILE, STR. 29 TO 31 PROFILE, STR. 33 TO STR. 39
PROFILE, ETC.).
F) PLEASE REVISE ALL APPLICABLE SWALE PROFILES THAT ARE
DISCHARGING INTO THE 30' BUFFER AREA TO EXTEND THE
EXISTING GROUND WITHIN THE BUFFER AREA TO ENSURE
DAYLIGHT. IN ADDITION, BE SURE THE LIMITS OF THE 30'
BUFFER ARE LABELED IN THESE PROFILES.
28. AS A PREREQUISITE TO SUBDIVISION PLAT RECORDATION:
A) THE $100/LOT BMP MAINTENANCE FEE MUST BE RECEIVED.
B) A PRO-RATA PAYMENT TO THE USCW REGIONAL PROGRAM MUST
BE RECEIVED IN AN AMOUNT APPROVED BY ENVIRONMENTAL
ENGINEERING DEPARTMENT.
B) IF APPLICABLE, TENTATIVE CONDITION #15 SHALL BE
ADDRESSED, WHICH STATES, "PRIOR TO RECORDATION THE
ENVIRONMENTAL ENGINEERING DEPARTMENT MUST HAVE RECEIVED
DOCUMENTATION FROM THE GEOTECHNICAL EXPERT THAT ALL
AREAS OF FORMER MINING ACTIVITY AS SHOWN ON THE APPROVED
CONSTRUCTION PLAN HAVE BEEN RECLAIMED IN A MANNER
CONSISTENT WITH EITHER DEPARTMENT OF MINES, MINERALS AND
ENERGY RECLAMATION CRITERIA OR CRITERIA RECOMMENDED BY
THE GEOTECHNICAL ENGINEER AS BEING APPROPRIATE AND IN
COMPLIANCE WITH GENERALLY ACCEPTED GEOTECHNICAL
ENGINEERING PRACTICE FOR SUCH SITUATIONS AS MAY BE
ENCOUNTERED. ALL AREAS OF FORMER MINING ACTIVITY SHALL
BE PORTRAYED ON THE RECORD PLAT."
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