Thanksgiving Holiday Closings... MORE

Hover here for Site Tools
Subdivision Review Comments
All Subdivision Review Comments for Case # 17CP0108




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

For Tentative Subdivision resubmittals:

1. Please note that submittal fees include the original submittal and two (2) additional reviews.

2. A letter of transmittal is required to accompany each submittal.

3. Please verify that Environmental Engineering, Fire, CDOT, VDOT, and Planning have reviewed the submittal before resubmitting. A resubmittal tendered, prior to receiving all the required departments’ review, will be counted as an additional submittal. Go to Case Selection Form or Go to Project List


 
CASE NO: 17CP0108 STATUS: PENDING APPROVAL
PROJECT NAME: HARPERS MILL NORTHWE - LAST INTERNET UPDATE: 11/22/17
SUBMITTAL TYPE: CONSTRUCTION PLAN
DEPARTMENT...REV..ROUTED..RESPONSE..STATUS....DATE...RVW..PHONE
ENVIR.ENGR.-: 00 04/06/17 05/02/17 COMPLETE 05/03/17 MCJ 751-2335
FIRE DEPT.--: 00 04/06/17 05/02/17 COMPLETE 04/14/17 JKL 748-1489
PLANNING----: 00 04/06/17 05/02/17 ******** ********
TRANSPORT.--: 00 04/06/17 05/02/17 COMPLETE 05/02/17 SES 751-4912
UTIL.PLAN.--: 00 04/06/17 05/02/17 ******** ********
UTILITIES---: 00 04/06/17 05/02/17 COMPLETE 05/02/17 A B 768-7450
UTIL.R.O.W.-: 00 04/06/17 05/02/17 ******** ********
VDOT--------: 00 04/06/17 05/02/17 ******** ********
REVIEW DEPARTMENT: UTILITIES DEPARTMENT
REVIEWER/PHONE # : ANDREW BARNES / 804-768-7450
NAME OF PLAN : HARPER'S MILL NW - SECTION 5
ADDRESS : HARPER'S MILL PKWY
SUBMISSION DATE : 04/06/17
PLAN DATED : 03/10/17
REVIEW DATE : 04/27/17
SITE PLAN NO. : 17CP0108
COMMENTS : 1ST REVIEW-NOT APPROVED
TABLE REVIEW : NO
PLAT PROCESS :
1. UTILITIES PROJECT NUMBER 17-0086 SHALL BE PLACED ON THE
LOWER RIGHT HAND CORNER OF EACH SHEET.
2. PLEASE PUT UTILITIES CONTACT ANDREW BARNES, 804-768-
7450, BARNESAND@CHESTERFIELD.GOV ON THE COVER SHEET.
3. PRIOR TO RELEASING TO THE CONSTRUCTION SECTION, A COPY
OF THE ENVIRONMENTAL ENGINEERING APPROVAL LETTER AND/OR ALL
OTHER APPLICABLE LOCAL STATE AND FEDERAL AGENCIES' APPROVAL
LETTERS MUST BE RECEIVED BY THIS DEPARTMENT. IN ADDITION,
ALL EASEMENTS NOT INCLUDED WITH THE SUBDIVISION PLAT MUST
BE DEDICATED WITH A SEPARATE PLAT AND AGREEMENT TO THE
COUNTY PRIOR TO RELEASING THE PROJECT TO THE CONSTRUCTION
SECTION.
4. PLEASE AMEND THE SITE ADDRESS TO REFERENCE HARPER'S
MILL NW - SECTION 3.
5. LABEL THE EXISTING WATER AND SEWER MAINS WITH SIZE,
MATERIAL, AND COUNTY PROJECT NUMBER ON ALL APPLICABLE PLAN
AND PROFILE SHEETS THAT DEPICT EXISTING CONDITIONS OR A
CONNECTION. YOU MAY EMAIL SWAVAILABILITY@CHESTERFIELD.GOV
TO OBTAIN AS-BUILT INFORMATION.
6. EXISTING EASEMENTS SHOWN ON THE PLAN MUST BE LABELED
WITH DEED BOOK AND PAGE NUMBER.
7. WILL IRRIGATION BE PROVIDED WITH THIS SECTION? IF SO,
PLEASE INCLUDE AN IRRIGATION METER SIZING FORM AND REVISE
THE PLANS TO INCORPORATE THE LOCATION OF IRRIGATION METERS.
8. ALL PROPOSED WATER AND SEWER LINES SHALL BE LABELED
WITH SIZE AND MATERIAL.
9. WHERE A HORIZONTAL SEPARATION OF 10' CANNOT BE
MAINTAINED BETWEEN WATERLINES AND SEWER MANHOLES (MH #16),
PLEASE INDICATE ON THE PLANS AND/OR PROFILE THAT: "THE
SANITARY SEWER MANHOLE SHALL BE OF WATERTIGHT CONSTRUCTION
AND BE TESTED IN PLACE BY VACUUM TESTING." PLEASE REVIEW
THE POSSIBILITY OF TERMINATING THE 6" WL FOR CROWLET PLACE
BETWEEN THE LOT 24 D/W AND STM STR #65.
10. INCLUDE A 1" AIR RELEASE VALVE AT APPROXIMATE STA.
37+25 OF THE PROPOSED HARPER'S MILL PARKWAY. SHOW THE ARV
IN PLAN AND PROFILE, INCLUDE STD. DET WAT-1, AND INCLUDE A
NOTE IN PROFILE VIEW THAT A CONTINUOUS RISE IN THE SUPPLY
LINE MUST BE PROVIDED FROM THE WATER MAIN TO THE ARV.
ADJUST THE DEPTH OF THE WATERMAIN AT THIS LOCATION TO AT
LEAST 5' TO FACILITATE POSITIVE DRAINAGE IN THE SUPPLY
LINE.
11. 8" X 6" TEES AT FIRE HYDRANTS SHOULD BE IDENTIFIED AS
HYDRANT TEES ON THE PLAN AND LISTED SEPARATELY IN THE
MATERIAL QUANTITY LIST.
12. IN BRENTOR WAY AND SAWPER ROAD, INSTALL AND 8"X6"
REDUCER AFTER THE FIRE HYDRANT TEE AND EXTEND A 6"
WATERLINE TO THE FLUSHING HYDRANTS.
13. PLEASE VERIFY THAT TYPICAL REFERENCE DISTANCES FROM
PROPOSED WATER LINES TO FACE OF CURB ARE SHOWN.
14. ADD A LABEL FOR THE PROPOSED FIRE HYDRANT IN SAWPER
ROAD (C3.1).
15. LOTS 5 & 14 HAVE DUPLICATE WATER SERVICES AND METERS.
16. EXTEND THE 16" WM IN HARPER'S MILL PARKWAY 1 FULL
STICK (20') PAST THE EDGE OF PAVEMENT. IF THE EXTENDED
WATER STUB WILL BE OUTSIDE OF THE ROW, PROVIDE A 16' WATER
EASEMENT.
17. PROVIDE A 12" STUB FOR COPPER GROVE, SOUTH OF SAWPER
ROAD.
18. WATER AT STA. 17+50 OF CROWLET DRIVE CANNOT GO UNDER
THE TRIPLE CULVERT AND MUST BE ROUTED AROUND THE HEADWALL
WITH RESTRAINED DUCTILE IRON PIPE IN AN EASEMENT.
19. VERIFY THE ELEVATION OF THE GAS MAIN AND DETERMINE IF
IT IS CATHODICALLY PROTECTED. IF SO, THE WATER LINE MUST
BE POLY-WRAPPED. THIS CONDITION APPLIES FOR THE CROSSINGS
IN HAPER'S MILL PKWY AND SAWPER ROAD.
20. LABEL EACH LOT REQUIRING A PRV IN PLANVIEW SO THERE ARE
NO MISTAKES OR OVERSIGHTS WHEN PLUMBING PERMITS ARE ISSUED.
21. IN LIEU OF THE 6" FLUSHING HYDRANT AT STA. 20+00 OF
HARPER'S MILL PARKWAY, PROVIDE A STANDARD FIRE HYDRANT
OUTSIDE OF THE ROW AND JUST SOUTH OF LOT 40.
22. ELIMINATE THE SOUTHERN VALVE AT THE INTERSECTION OF
SAWPER ROAD AND BRENTOR WAY IN ORDER TO AVOID CONFLICT WITH
THE GAS EASEMENT.
23. MOVE THE WATER METER FOR LOT 38 TO STA. 13+65 IN ORDER
TO AVOID CROSSING THE UTILITY EASEMENT WITH THE SERVICE
LINE.
24. MOVE THE WATER METER FOR LOT 33 TO STA. 19+90 TO AVOID
DISTURBING THE SERVICE LINE DURING THE EXTENSION OF THE
ROAD OR WATERLINE.
25. AN UPDATED HYDRAULIC ANALYSIS IS REQUIRED FOR ALL
PIPES GREATER THAN 8" - INCLUDE PROJECTED OFFSITE FLOWS
FROM COPPER GROVE TO THE SOUTH.
26. THERE ARE MULTIPLE SECTIONS OF 8" SANITARY SEWER THAT
ARE SHOWN AS 10" ON THE TENTATIVE. PLEASE REVIEW AND
ADDRESS THIS DISCREPANCY WITH THE UPDATED HYDRAULIC
ANALYSIS.
27. DUE TO THE DEPTH OF THE PROPOSED SANITARY SEWER FROM
MH 34 - 36, PLEASE PROVIDE A 32' SANITARY SEWER EASEMENT.
28. DUE TO THE DEPTH OF THE PROPOSED SANITARY SEWER UNDER
HARPER'S MILL PARKWAY, PROVIDE A 20" STEEL CASING PIPE
UNDER THE ROADWAY, IN ACCORDANCE WITH CAS-1 AND CAS-2.
INCLUDE BOTH DETAILS IN THE PLANS.
29. UTILITY EASEMENTS LOCATED BETWEEN LOTS 29/30 AND 37/38
NEED TO BE CALLED OUT AS SANITARY SEWER EASEMENTS. EXTEND
A SANITARY SEWER PIPE FROM MH 17 TO BETWEEN LOTS 37/38 TO
AVOID FUTURE DISRUPTION. PROVIDE A 10' TEMPORARY
CONSTRUCTION EASEMENT NEAR LOT 30 ON THE EASE SIDE.
30. SANITARY SEWER IN EXCESS OF 20' DEEP MUST BE DUCTILE
IRON PIPE FROM MANHOLE TO MANHOLE.
31. PLEASE INDICATE WHICH LOTS WILL REQUIRE A BACKWATER
VALVE IN ACCORDANCE WITH DES-2, NOTE 3. IT APPEARS THAT
LOTS ON BRENTOR CT, BRENTOR WAY, SCOLERS DRIVE, AND CROWLET
CT WILL MEET THIS CONDITION.
32. ALL MANHOLES SHALL BE 6" ABOVE THE 100-YEAR FLOODPLAIN
ELEVATION, BUT NOT MORE THAN 4' ABOVE EXISTING GROUND. IF
THE TOP IS 4' ABOVE EX. GROUND AND LESS THAN 6" ABOVE THE
FLOODPLAIN ELEVATION, THE MANHOLE SHALL HAVE A WATERTIGHT
FRAME AND COVER. MANHOLE VENTING WILL BE REQUIRED IF RUNS
OF SEWERLINE WITH WATERTIGHT F&C ARE GREATER THAN 1000
FEET.
33. INDICATE COVER AT ALL STREAM CROSSINGS IN PROFILE
VIEW.
34. IF LESS THAN 3.5' OF COVER IS PROVIDED AT A STREAM
CROSSING, THE SEWER WILL EITHER NEED TO BE ENCASED IN
CONCRETE (DETAIL CAS-5) OR CONSTRUCTED OF DUCTILE IRON PIPE
FROM MANHOLE TO MANHOLE. THIS CONDITION APPEARS TO OCCUR
FROM MH 6-5, MH 16-10, AND MH 9-8.
35. ALL STREAM CROSSINGS IN PROFILE VIEW MUST INDICATE THE
100-YR WSE AND THE NORMAL WSE.
36. PROVIDE A DOG-HOUSE BASE MANHOLE FOR SANITARY MH #1,
CALL IT OUT IN PLAN AND PROFILE, AND INCLUDE ANY NECESSARY
NOTES OR DETAILS.
37. TIE THE LATERAL FOR LOT 26 INTO MH 22.
38. WHEREVER POSSIBLE, SANITARY LATERALS SHOULD BE TIED IN
TO MANHOLES. PLEASE CONNECT THE LATERAL FOR LOT 26 INTO
SAN MH 22.
39. LABEL THE TITLE OF THE PROFILE IN THE BOTTOM RIGHT
CORNER OF C4.3.
40. ADD A NOTE TO THE PROFILE SHEETS SPECIFYING THAT 6"
LATERALS
TIED-IN TO MANHOLES SHOULD HAVE CROWNS MATCHED TO THE MAIN
LINE.
41. ALL WATER LINE CONSTRUCTED IN FILL SHALL BE CALLED OUT
IN PROFILE AS FULLY RESTRAINED IN ADDITION TO BEING CL52
DUCTILE IRON.
42. FOR ALL VERTICAL BENDS OF WATERLINES, INDICATE THE
OVERALL LENGTH OF RESTRAINT AND INDICATE THAT ALL JOINTS
SHALL BE RESTRAINED.
43. DISPLAY FIRE HYDRANTS IN PROFILE VIEW.
44. IF 1.5' OF VERTICAL CLEARANCE CANNOT BE MAINTAINED
BETWEEN WATER AND OTHER UTILITIES, CALL OUT COMPACTED STONE
AND CENTER A SECTION OF CL52 DUCTILE IRON PIPE AT THE POINT
OF CROSSING.
45. THE APPEARS TO BE A PROFILE MISSING FOR SANITARY SEWER
24-5.
46. WHY DOES THE SANITARY PIPE INCREASE FROM AN 8" TO 10"
AT MH #6?
47. MINIMUM SLOPE FOR 8" SANITARY SEWER IS 0.40% FOR NON-
TERMINAL LINES. PLEASE REVISE THE DESIGN OF SANITARY SEWER
BETWEEN MH 27 AND MH 26.
48. PROVIDE AN INSIDE DROP CONNECTION FOR SANITARY MANHOLE
#32. INCLUDE STANDARD DETAIL MAN-16 ON THE PLANS.
49. MATCH CROWNS OF THE INCOMING AND OUTGOING PIPES FOR
SANITARY MANHOLE #6.
50. SANITARY SEWER WITH DEPTHS GREATER THAN 14', BUT LESS
THAN 20' SHALL HAVE AN EXTRA FOOT OF STONE OVER TOP OF THE
PIPE. PLEASE INDICATE IN PROFILE VIEW WHERE THIS CONDITION
APPLIES.
51. IN CROWLET PLACE, INDICATE STONE BACKFILL FOR THE
SANITARY SEWER LOCATED UNDER THE CURB, 5'EACH WAY. ALSO
SHOW IN PROFILE VIEW.
52. WILL A LANDSCAPE/LIGHTING PLAN BE PROVIDED? IF SO,
PLEASE ENSURE THAT ALL PROPOSED WATER AND SEWER UTILITIES
ARE SHOWN. THIS INCLUDES WATER SERVICE LINES AND
WATERMAINS AS WELL AS SEWER LATERALS. STREET TREES MUST BE
LOCATED AT LEAST 10 FEET FROM SERVICE LINES/WATERMAINS AND
LATERALS/CLEANOUTS AND MAY NOT BE LOCATED WITHIN PUBLIC
EASEMENTS.
53. PLEASE BE ADVISED THAT PER A CONDITION OF ZONING,
WHICH REQUIRES THAT THE DEVELOPER CONTRIBUTE TOWARDS THE
COST OF EXPANDING THE DRY CREEK WASTEWATER PUMP STATION,
PAYMENT TO THE COUNTY IN THE AMOUNT OF $ 7,790 MUST BE MADE
PRIOR TO ISSUANCE OF THE FIRST BUILDING PERMIT FOR THIS
SITE. PAYMENTS ARE TO BE SENT TO THE ATTENTION OF MR. C.
RANDOLPH PHELPS, DEVELOPMENT SECTION, CHESTERFIELD COUNTY
UTILITIES DEPARTMENT. CHECKS ARE TO BE MADE PAYABLE TO
"TREASURER, CHESTERFIELD COUNTY".
54. AS A RESULT OF ANY CHANGES TO THE PROPOSED UTILITIES
RESULTING FROM THESE COMMENTS, PLEASE UPDATE THE MATERIAL
QUANTITIES ON THE COVER SHEET ACCORDINGLY.
55. 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 ANDREW BARNES
(BARNESAND@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.
56. AFTER FINAL 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). ONE ADDITIONAL ROLLED SET WILL BE REQUESTED AFTER
THE PROJECT IS RELEASED TO CONSTRUCTION TO BE USED FOR AS-
BUILTS.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
REVIEW DEPARTMENT: CHESTERFIELD TRANSPORTATION DEPARTMENT
REVIEWER/PHONE#: STEVEN E. SIMONSON, P.E. (804)748-1037
NAME OF PLAN: HARPER'S MILL NORTHWEST, SECTION 5
CASE NUMBER: 17CP0108
LATEST PLAN DATE: 03/10/2017
DEPT. REC'D. DATE: 04/11/2017
SUBMITTAL NUMBER: ONE
REVIEW DATE: 05/02/2017
RECOMMENDATION: APPROVED
TABLE REVIEW: YES
.
NOTE: THE TENTATIVER CASE FOR HARPER'S MILL NORTHWEST
SHOULD BE 04TS0359, NOT 04TS0365.
.
REVIEW DEPARTMENT: PLANNING
REVIEW DEPARTMENT : PLANNING
REVIEWER / PHONE # : WHIT KIRTLEY / 706-7691
PLAN NAME : HARPERS MILL NORTHWEST SEC 5
PLAN NUMBER : 17CP0108
ORIGINAL PLAN DATE : 3/10/17
REVIEW DATE : 5/3/17
LATEST SUBMISSION DATE : 3/17/17
ACCEPTED DATE: 4/6/17
SUBMITTAL NUMBER :1
STATUS : CORRECTIONS REQUIRED
TABLE REVIEW : NO
.
.
1. INCLUDE THE CONSTRUCTION PLAN CASE NUMBER OF THE
BOTTOM RIGHT OF EACH PAGE. (17CP0108)
.
2. PROVIDE AN AUTOCAD FILE DEPICTING THE BOUNDARIES FOR
SECTION 5.
.
3. IN THE NOTES, REVISE THE TENTATIVE PLAN TO STATE 04TS0359
APPROVED ON 9/28/05
.
4. ON THE TREE CANOPY PLAN, THERE ARE AREAS WITHIN THE
OPEN SPACES THAT CAN BE USED TO CAPTURE MORE TREE
CANOPY AREAS. SPECIFICALLY, THE BUFFER ALONG HARPERS
MILL PARKWAY. CONSIDER UTILIZING THESE AREAS TO ENSURE
THAT THE OVERALL TREE CANOPY FOR HARPERS MILL NORTHEAST
DOES NOT FALL BELOW 34.19 ACRES AS INDICATED ON THE
OVERALL CANOPY PLAN. BE SURE TO UPDATE THE CALCULATIONS
IF THE AREA IS UPDATED.
.
5. PROVIDE TREE PROTECTIONS TAPE FOR THE TREE CANOPY AREAS
ON THE E & S PLANS.
.
6. LABEL THE 50 FOOT BUFFER ON THE EASTERN SIDE OF SAWPER
ROAD ON ALL APPLICABLE SHEETS
.
7. THE BUILDING LINES ON LOTS 16-17, APPEAR TO BE
PLACED WHERE THE LOT WIDTH IS 95-100 FEET. THE REQUIRED
LOT WIDTH IS 90 FEET SO, THE BUILDING LINES MAY BE MOVED
FORWARD.
.
8. THE LOT WIDTH FOR LOTS 37 DOES NOT MEET THE MINIMUM
90 FOOT REQUIREMENT. REVISE THE LOT OR MOVE THE FRONT
BUILDING LINE BACK.
.
9. THE BUILDING LINES DEPICTED FOR LOTS 3-4, 16-17, AND 19 A
INCORRECT AS THE RELATE TO THE PIPELINE EASEMENT. THE
REQUIRED SETBACK OFF OF THE GAS LINE IS 20 FROM THE
EASEMENT OR 35 FEET FROM THE PIPELINE, WHICHEVER IS
GREATER. THE REAR SETBACK IS 25 FEET. REVISE TO SHOW
THE MORE RESTRICTIVE SETBACK FROM THE REAR PROPERTY
LINE.
.
BE ADVISED THAT THE SETBACK FROM THE GAS PIPELINE IS FOR
PRINCIPAL AND ACCESSORY STRUCTURES. THIS INFORMATION
SHALL BE REFLECTED ON THE FINAL PLAT WITH A SYMBOL AND
NOTE ON THE IMPACTED LOTS.
.
10. UPDATE THE NOTES TO INCLUDE ZONING CASE 17SN0557.
.
.
.
CONDITIONS
.
.
1. A 100 LOT CHOKE POINT EXISTS ALONG HARPERS MILL PARKWAY
RECORDATION OF SOUTHWEST SECTIONS 2 AND 3 SOUTHWEST
AND CONNECTION BETWEEN SOUTHWEST SECTION 3
AND SOUTHWEST SECTION 2 SHALL BE RECORDED PRIOR TO
OR IN CONJUNCTION WITH NORTHWEST SECTION 5
TO MAINTAIN COMPLIANCE WITH 17-76.
.
A CONNECTION BETWEEN NORTHWEST SECTION 3 AND
NORTHWEST SECTION 5 MAY ALSO ALLEVIATE
THE 100 LOT CHOKE DEPENDING ON WHAT HAS
BEEN RECORDED PRIOR TO NORTHWEST SECTION 5
REVIEW DEPARTMENT: FIRE AND LIFE SAFETY
REVIEWER / PHONE#: KIM LESTER / 748-1489
PLAN NAME: HARPERS MILL NW - SECTION 5
PLAN NUMBER: 17CP0108
LATEST REVISION DATE: 3/10/17
REVIEW DATE: 4/12/17
LATEST SUBMISSION DATE: 4/10/17
SUBMITTAL NUMBER: 1ST REVIEW
STATUS: NOT APPROVED
TABLE REVIEW: NO
.
RELOCATE THE HYDRANT AT STATION 11+55 TO STATION 10+50 ON
SAMPLER ROAD.
.
RELOCATE THE HYDRANT AT STATION 11+90 TO STATION 10+50 ON
CROWLET DRIVE.
.
ADD A HYDRANT AT THE INTERSECTION OF CROWLET DRIVE AND
CROWLET PLACE.
.
PLACE A NOTE ON THE PLAN THAT INDICATES "NO BUILDING PERMIT
WILL BE ISSUED FOR LOTS 26 THRU 29 ON SCOLERS DRIVE UNTIL TH
TEMPORARY TURNAROUND IS BUILT OR THE ROAD IS EXTENDED.
.
PRIOR TO RECORDATION THE EMERGENCY ACCESS FOR HARPERS MILL
SOUTHWEST SECTION 2 SHALL BE IN PLACE AND INSPECTED BY THE
FIRE DEPARTMENT.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
============================================================
============================================================
.
REVIEW DEPARTMENT : ENVIRONMENTAL ENGINEERING
REVIEWER/PHONE # : MARIA JENKINS/751-2335
NAME OF PLAN : HARPERS MILL NORTHWEST SECTION 5
SITE PLAN NO. : 17CP0108
LATEST PLAN DATE : 03/10/17
DEPT. REC'D DATE : 04/06/17
SUBMITTAL NUMBER : 1
REVIEW DATE : 05/02/17
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.
.
H) THE ENVIRONMENTAL ENGINEERING DEPARTMENT MUST HAVE
RECEIVED SIGNED, WRITTEN NOTIFICATIONS FROM THE ADJACENT
PROPERTY OWNERS, N/F COLE, H. AT 8705 BALDWIN CREEK
ROAD, N/F SOWERS, D. AT 16900 BEACH ROAD, TAYLOR, J. AT
8611 BALDWIN CREEK ROAD, N/F VAUGHAN, D. AT 8601 BALDWIN
CREEK ROAD, N/F HMG INVESTMENT LLC AT 8521 BALDWIN CREEK
ROAD AND N/F HALL, R. AT 8501 BALDWIN CREEK ROAD, WHICH
SHOULD BE SENT U.S. POSTAL CERTIFIED MAIL, RETURN
RECEIPT REQUESTED. INCLUDE AN 8½ X 11 COPY OF THE
PROPOSED CONSTRUCTION ACTIVITY ADJACENT TO THEIR
PROPERTIES.
.
3. THESE ARE IN REGARDS TO THE MS-19:
.
A) PLEASE EXTEND THE ENERGY DISSIPATER SPECIFIED AT THE
END OF THE STUB ROADS LOCATED IN THE PROXIMITY OF
STATIONS 26+80 AND 32+20 ON HARPERS MILL PARKWAY TO THE
EASTERN SIDE OF THESE DISSIPATERS TO APPROXIMATELY A FEW
FEET BELOW THE CURB & GUTTER TO ALLOW TO SHEET FLOW
BEYOND THE FILL SECTION.
.
IN ADDITION, ADJUST THE TEMPORARY DRAINAGE EASEMENT TO
INCLUDE THE EXTENDED PORTION OF THESE ENERGY DISSIPATER.
REFLECT THE CHANGES ON ALL APPLICABLE SHEETS.
.
ADDITIONALLY, PERFORM MS-19 ANALYSIS AT THE EXISTING
GROUND BELOW THE TEMPORARY IMPROVEMENTS TO VERIFY THAT
THE FLOW VELOCITIES WOULD NOT CAUSE EROSION TO THE
RECEIVING FACILITY.
.
INCLUDE, LIMITS OF DRAINAGE AREAS WITH AMOUNT OF
ACREAGE, HYDROLOGY/HYDRAULIC CALCULATIONS WITH SCALED X-
SECTIONS, SHOW/LABEL THE MS-19 SECTIONS-LOCATIONS ON THE
PLANS AND UPDATE THE MS-19 TO INCLUDE THESE LOCATIONS.
.
FURTHERMORE, PLEASE SUBMIT MS-19 VARIANCE REQUEST LETTER
SITUATION H. SINCE, THESE TEMPORARY IMPROVEMENTS ARE
ENDING BEFORE REACHING THE CENTERLINE OF THE NATURAL
DRAINAGEWAY(S).
.
B) PER COMMENT 28 UNDER ROAD AND DRAINAGE, PLEASE
REVISE THE FLOW PATH (I.E. SHEET FLOW, SHALLOW
CONCENTRATED FLOW, CHANNEL FLOW, ETC.) TO ACCOUNT FOR
THESE PRIVATE PONDS ON ALL APPLICABLE PLAN VIEWS.
.
C) PER COMMENT 28 UNDER ROAD AND DRAINAGE, PLEASE
DEPICT THE PRIVATE PONDS AND REVISE THE DRAINAGE AREAS
AT MS-19 STR'S C6 AND C7. SUBMIT REVISED HYDROLOGIC AND
HYDRAULIC CALCULATIONS, AND REFLECT THE CHANGES ON ALL
APPLICABLE SHEETS.
.
D) PER COMMENT 28 ROAD AND DRAINAGE, PLEASE REVISE MS-
19 STR. C4, STR. 63A TO ACCOUNT FOR ADDITIONAL DRAINAGE
AREAS.
.
E) REVISE THE TITLE SHEET ON SHEET C5.5 TO STATE MS-19
ANALYSIS.
.
4. WE OFFER, BUT NOT LIMITED TO, THE FOLLOWING COMMENTS:
.
4.1) PER COMMENT #2 UNDER ROAD AND DRAINAGE, THE BMP#2
MUST FUNCTION AS A SEDIMENT BASIN UNTIL THE LAST SECTION
DRAINING TO ITS DIRECTION HAS BEEN BUILT.
.
THEREFORE, PLEASE SHOW THIS SEDIMENT BASIN WITH
PERTINENT DETAILS AND NOTES ON THE EC PHASE I/PHASE II
PLANS.
.
4.2) PLEASE PROVIDE SMALL EXCAVATED PITS TO INTERCEPT
SEDIMENTS FROM THE ROAD CONSTRUCTION ON THE RIGHT SIDE
OF HARPER MILL PARKWAY IN THE PROXIMITY OF STATIONS
23+50 AND 24+00.
.
IN ADDITION, DIVERSION DIKE AND SILT FENCE SHOULD BE
PROVIDED ON THE RIGHT SIDE OF HARPERS MILL PARKWAY IN
THE PROXIMITY OF STATIONS 20+00 TO 23+50 AND 25+00 TO
24+00. BE SURE THESE DIVERSION DIKES/SILT FENCE ARE
ENDING AT THE SMALL EXCAVATED PITS REQUESTED IN THE
PREVIOUS PARAGRAPH. THIS IS TO DIVERT UPSTREAM
UNDISTURBED AREAS.
.
FURTHERMORE, INCLUDE THE ENCLOSED DETAIL OF SMALL
EXCAVATED PIT ON THE EC PLANS.
.
4.3) SIMILARLY, PLEASE BE SURE TO PROVIDE SMALL
EXCAVATED ALONG THE RIGHT SIDE OF HARPERS MILL PARKWAY
PRIOR TO REACHING THE NATURAL DRAINAGEWAY TO INTERCEPT
SEDIMENT FROM THE ROAD CONSTRUCTION IN THE PROXIMITY OF
STATIONS 18+00/18+60/33+50/34+00/ETC. WITH ADDITIONAL
EROSION CONTROL MEASURES, SUCH AS DIVERSION DIKE AND
SILT FENCE. THE DIVERSION DIKE/SILT FENCE SHOULD START
IN THE VICINITY OF STATION 25+00 AND TO CONTINUE TO
SURROUND THE STUB ROAD AND END THIS DIVERSION/SILT FENCE
ONCE IT REACHES THE SMALL EXCAVATED PIT LOCATED IN THE
PROXIMITY OF STATION 18+00.
.
SIMILARLY, PROVIDE DIVERSION DIKE/SILT FENCE STARTING IN
THE PROXIMITY OF STATION 31+90 AND CONTINUE UNTIL IT
REACHES THE SMALL EXCAVATED PIT REQUESTED IN THE
PROXIMITY OF STATION 18+60.
.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
.
4.4) PLEASE PROVIDE A SEDIMENT TRAP TO BE LOCATED ON THE
LEFT SIDE OF HARPERS MILL PARKWAY IN THE PROXIMITY OF
STATION 41+70.
.
INCLUDE DRAINAGE AREAS INTERCEPTED BY THIS TRAP AND
DIMENSION OF THIS DEVICE ON THE EC PLANS.
.
IN ADDITION, PROVIDE SILT FENCING ON BOTH SIDES OF THE
ROAD TEMPLATE IN THE PROXIMITY OF STATION 40+00 AND
CONTINUE UNTIL THESE SILT FENCES REACH THE SEDIMENT
TRAP REQUESTED IN THE PREVIOUS PARAGRAPH.
.
RIGHT-OF-WAY DIVERSION SHOULD BE SPECIFIED IN THE
PROXIMITY OF STATION 42+20 TO DIVERT DISTURBED AREAS
ALONG THE NORTHERN SIDE OF HARPERS MILL PARKWAY. REFLECT
THE CHANGES ON THE EC PHASE I/PHASE II.
.
INCLUDE THE RIGHT-OF-WAY DIVERSION ON THE EC PLANS.
.
4.5) PLEASE PROVIDE TWO SMALL EXCAVATED PITS ALONG THE
NORTHERN SIDE OF HARPERS MILL PARKWAY IN THE VICINITY OF
STATIONS 23+00 AND 24+00 TO INTERCEPT SEDIMENTS FROM THE
FILL SECTION.
.
IN ADDITION, PROVIDE SILT FENCE TO SURROUND THE FILL
SECTION OF THE ROAD IN THE PROXIMITY OF STATION 21+50 TO
23+00 AND 25+00 TO 24+00. BE SURE TO END THE SILT FENCE
TO INCLUDE THE SMALL EXCAVATED PITS REQUESTED IN THE
PREVIOUS PARAGRAPH. REFLECT THE CHANGES ON THE EC PHASE
I/PHASE II.
.
4.6) BE SURE TO PROVIDE SUPER SILT FENCE TO SURROUND THE
FILL SECTION ALONG THE NORTHERN SIDE OF HARPER MILL
PARKWAY IN THE PROXIMITY OF STATION 26+00 UNTIL IT
REACHES THE ST6 AND PROVIDE SUPER SILT FENCE TO SURROUND
THE FILL SECTION FROM STR. C2 CONTINUE THIS SILT FENCE
UNTIL IT REACHES THE ST6.
.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
.
4.7) SIMILARLY, PLEASE PROVIDE SUPER SILT FENCING TO
SURROUND THE FILL SECTION OF THE ROAD ALONG THE NORTHERN
SIDE OF HARPERS MILL PARKWAY IN THE PROXIMITY OF STATION
28+60 AND CONTINUE THIS SUPER SILT FENCE UNTIL IT
REACHES THE ST5. REFLECT THE CHANGES ON THE EC PHASE
I/PHASE II.
.
4.8) PLEASE PROVIDE SILT FENCE TO SURROUND A PORTION OF
THE FILL SECTION AT THE CURVE RETURN BETWEEN HARPER MILL
PARKWAY AND SAWPER ROAD. REFLECT THE CHANGES ON THE EC
PHASE I/PHASE II PLANS.
.
IN ADDITION, PLEASE LABEL SAWPER ROAD ON SHEET C2.30.
.
4.9) SUPER SILT FENCE SHOULD BE PROVIDED ALONG THE
NORTHERN SIDE OF HARPERS MILL PARKWAY TO SURROUND THE
FILL SECTION IN THE PROXIMITY OF STATION 35+00 UNTIL IT
REACHES THE ST1. REFLECT THE CHANGES ON THE EC PHASE
I/PHASE II PLANS.
.
4.10) PLEASE PROVIDE INLET PROTECTION AT THE EXISTING
STR'S 11/12A/12/ETC. REFLECT THE CHANGES ON THE EC PHASE
I/PHASE II.
.
4.11) PLEASE SHOW/LABEL THE EXISTING STUB PIPE STR. 6AP
AND PROVIDE CIP ON THE UPSTREAM SIDE OF THIS CULVERT.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
.
4.12) PLEASE PROVIDE TWO SMALL EXCAVATED PITS TO
INTERCEPT SEDIMENT FROM THE ROAD CONSTRUCTION PRIOR TO
REACHING THE NATURAL DRAINAGEWAY/WETLAND AREA. THESE
SMALL EXCAVATED PITS SHOULD BE LOCATED ALONG THE
SOUTHERN SIDE OF BRENTOR WAY IN THE PROXIMITY OF
STATIONS 14+00 AND 15+00.
.
IN ADDITION, PROVIDE SILT FENCING TO SURROUND THE
EASTERN SIDE OF BRENTOR COURT IN THE PROXIMITY OF
STATION 10+40 AND CONTINUE THIS SILT FENCE ALONG THE
SOUTHERN SIDE OF BRENTOR WAY UNTIL IT REACHES THE
EXCAVATED PIT REQUESTED IN THE PROXIMITY OF STATION
14+00.
.
SILT FENCE SHOULD BE PROVIDED ALONG WESTERN SIDE OF
SAWPER ROAD IN THE PROXIMITY OF STATION 15+20 AND
CONTINUE ALONG THE SOUTHERN SIDE OF BRENTOR WAY UNTIL IT
REACHES THE EXCAVATED PIT REQUESTED IN THE PROXIMITY OF
STATION 15+00.
.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
.
4.13) PLEASE PROVIDE A SMALL EXCAVATED PIT TO BE LOCATED
ON THE NORTHERN SIDE OF BRENTOR WAY IN THE PROXIMITY OF
STATION 15+00.
.
IN ADDITION, PROVIDE SILT FENCE ALONG THE NORTHERN SIDE
OF BRENTOR WAY IN THE PROXIMITY OF STATION 10+00 AT
RADIUS TURN AND CONTINUE THIS SILT FENCE UNTIL IT
REACHES THE EXCAVATED PIT REQUESTED ON THE NORTHERN SIDE
IN THE PROXIMITY OF STATION 15+00.
.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
.
4.14) PLEASE EXTEND THE SILT FENCE SPECIFIED TO SURROUND
THE CUL-DE-SAC PERTINENT TO BRENTOR WAY UNTIL IT REACHES
THE ST4.
.
BE SURE TO SHOW THIS SILT FENCE SPECIFIED ALONG THE CUL-
DE-SAC ON BRENTOR WAY ON THE EC PHASE I PLANS. REVISE
ACCORDINGLY.
.
4.15) PLEASE BE SURE TO SHOW THE EC MEASURES SUCH AS:
SILT FENCE/DIVERSION DIKES SPECIFIED ON THE ALONG THE
PROPOSED ROADS (I.E. SAWPER ROAD, BRENTOR WAY, BRENTOR
COURT, CROWLET DRIVE, CROWLET COURT, SCOLERS DRIVE,
ETC.) TO BE SHOWN ON THE EC PHASE I PLANS. REVISE
ACCORDINGLY.
.
4.16) PLEASE BE SURE TO LABEL ALL THE PROPOSED CONTOURS
ON SHEET C2.4.
.
4.17) PLEASE EXTEND THE SILT FENCE SPECIFIED ON THE
EASTERN SIDE OF SAWPER ROAD IN THE PROXIMITY OF STATION
12+00 AND CONTINUE THIS SILT FENCE TO INCLUDE THE
TEMPORARY STOCKPILE UNTIL IT REACHES THE ST1.
.
REFLECT THE CHANGE ON THE EC PHASE I/PHASE II.
.
4.18) PLEASE PROVIDE RIGHT-OF-WAY DIVERSION IN THE
PROXIMITY OF STATION 15+20 TO DIVERT SEDIMENTS TO THE
ST2.
.
4.19) PLEASE PROVIDE SILT FENCING ALONG THE EASTERN SIDE
OF SAWPER ROAD IN THE PROXIMITY OF STATION 15+20 AND
CONTINUE THIS SILT FENCE UNTIL IT REACHES THE ST3.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
.
4.20) PLEASE REVISE THE LABELING IN THE DRAINAGE AREAS
FOR THE ST2 ON SHEET C2.4. IT IS CURRENTLY SHOWN AS ST1.
REVISE ACCORDINGLY.
.
4.21) PLEASE BE SURE TO PROVIDE SILT FENCE TO SURROUND
THE FILL ROAD SECTION SPECIFIED ALONG THE EASTERN SIDE
IN THE VICINITY OF STATION 13+00 AND CONTINUE THIS SILT
TO SURROUND THE TEMPORARY STOCKPILE UNTIL IT REACHES THE
ST7.
.
REFLECT THE CHANGE ON THE EC PHASE I/PHASE II.
.
4.22) PLEASE PROVIDE FOUR SMALL EXCAVATED PITS TO BE
LOCATED ON EITHER SIDE OF THE NATURAL DRAINAGEWAY
UPSTREAM AND DOWNSTREAM OF THE PROPOSED CULVERT STR. C5
IN THE PROXIMITY OF STATIONS 14+30/15+00 ON THE WESTERN
SIDE AND 14+80/15+30 ON THE EASTERN SIDE.
.
IN ADDITION, PROVIDE SILT FENCE ALONG THE EASTERN SIDE
AND WESTERN SIDE ON CRAWLET DRIVE STARTING FROM STATION
12+00 ALONG THE WESTERN SIDE UNTIL IT REACHES THE SMALL
EXCAVATED PIT REQUESTED IN THE PROXIMITY OF STATION
14+30.
.
SIMILARLY, PROVIDE SILT FENCING ALONG THE WESTERN SIDE
OF CROWLET DRIVE IN THE PROXIMITY OF STATION 15+00 TO
17+00. BE SURE TO INCLUDE THE SMALL EXCAVATED PIT
REQUESTED IN THE PROXIMITY OF STATION 15+00.
.
ADDITIONALLY, PLEASE PROVIDE SILT FENCING ALONG THE
EASTERN SIDE OF CROWLET DRIVE IN THE PROXIMITY OF
STATION 15+30 TO 17+00. BE SURE TO INCLUDE THE SMALL
EXCAVATED PIT REQUESTED IN THE PROXIMITY OF STATION
15+30.
.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
.
4.23) PLEASE PROVIDE THREE SMALL EXCAVATED PITS TO BE
LOCATED TWO ON THE UPSTREAM SIDE OF THE PROPOSED CULVERT
STR. C6 ON EITHER SIDE OF THE NATURAL DRAINAGEWAY IN THE
VICINITY OF STATIONS 17+10/17+80 AND THE THIRD EXCAVATED
PIT TO BE LOCATED ON THE DOWNSTREAM SIDE OF THE PROPOSED
CULVERT STR. C6 IN THE PROXIMITY OF STATION 17+00.
.
IN ADDITION, PROVIDE SILT FENCE TO SURROUND THE FILL/CUT
SECTION ALONG THE WESTERN SIDE IN THE PROXIMITY OF
STATION 20+00 TO 18+00. BE SURE TO INCLUDE THE EXCAVATED
PITS REQUESTED IN THE PROXIMITY OF STATIONS 17+10/17+80.
.
REFLECT THE CHANGE ON THE EC PHASE I/PHASE II.
.
4.24) BE SURE TO PROVIDE SILT FENCING TO SURROUND THE
FILL ROAD SECTION ALONG THE EASTERN SIDE IN THE
PROXIMITY OF STATION 17+50 AND CONTINUE THIS SILT
FENCING UNTIL IT REACHES THE ST9.
.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
.
4.25) PLEASE PROVIDE THREE SMALL EXCAVATED PITS TO BE
LOCATED TWO ON THE UPSTREAM SIDE OF THE PROPOSED CULVERT
STR. C7 ON EITHER SIDE OF THE DRAINAGEWAY IN THE
VICINITY OF STATIONS 13+40/14+00 AND THE THIRD EXCAVATED
PIT ON THE DOWNSTREAM SIDE THE PROPOSED CULVERT STR. C7
IN THE PROXIMITY OF STATION 13+70.
.
IN ADDITION, PROVIDE SILT FENCING ALONG NORTHERN SIDE OF
SCOLERS DRIVE STARTING FROM STATIONS 12+50 AND CONTINUE
THIS SILT FENCING UNTIL IT REACHES THE EXCAVATED PIT
REQUESTED IN THE PROXIMITY OF STATION 13+40.
.
SIMILARLY, PROVIDE SILT FENCE TO SURROUND PART OF THE
CUL-DE-SAC ALONG THE NORTHERN SIDE OF SCOLERS DRIVE AND
CONTINUE THIS SILT FENCE UNTIL IT REACHES THE EXCAVATED
PIT REQUESTED IN THE PROXIMITY OF STATION 14+00.
.
REFLECT THE CHANGES ON THE EC PHASE I/PHASE II.
.
4.26) BE SURE TO LABEL CROWLET DRIVE AND SCOLERS DRIVE
ON SHEET C2.5.
.
4.27) BE SURE TO PROVIDE TEMPORARY SLOPE DRAINS FOR FILL
ROAD TEMPLATES EXCEEDING 5' IN HEIGHT. PLEASE SEE THE
FOLLOWING LOCATION FOR THE SLOPE DRAINS:
.
A) ON THE LEFT SIDE IN THE PROXIMITY OF STATION 23+00 ON
HARPERS MILL PARKWAY.
.
B) ON BOTH SIDE OF THE ROAD IN THE PROXIMITY OF STATION
28+00 ON HARPERS MILL PARKWAY.
.
C) ON THE LEFT SIDE IN THE PROXIMITY OF STATION 33+00 ON
HARPERS MILL PARKWAY.
.
D) ON THE RIGHT SIDE IN THE PROXIMITY OF STATION 33+50
ON HARPERS MILL PARKWAY.
.
E) ON THE RIGHT SIDE IN THE PROXIMITY OF STATION 12+00
ON CROWLET DRIVE. IN ADDITION, PROVIDE OUTLET PROTECTION
AT THE END OF THE TEMPORARY SLOPE DRAIN.
.
IN ADDITION, SPECIFY THE DIAMETER AND MATERIAL OF THESE
SLOPE DRAINS ON THE PLANS AND PROVIDE A DETAIL OF THE
TEMPORARY SLOPE DRAIN ON THE EC PLANS.
.
REFLECT THE CHANGES ON THE EC PHASE II PLANS.
.
4.28) PLEASE PROVIDE MS-16 DETAIL ON THE EC PLANS.
.
4.29) PROVIDE THE ENCLOSED DETAIL FOR TEMPORARY STREAM
CROSSING 3.23-2 ON THE EC PLANS.
.
4.30) PLEASE PROVIDE THE MINIMUM STANDARD NOTES 9VAC25-
840-40 1 THRU 19 ON SHEET C2.7.
.
4.31) BE SURE TO LABEL ALL THE EXISTING AND PROPOSED
CONTOURS WITH ELEVATIONS. REFLECT THE CHANGES ON THE EC
PHASE I/PHASE II.
.
4.32) 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 6, 7, 24, 26, ETC.
WITH "NBP". REFLECT THE CHANGES ALL APPLICABLE SHEETS.
.
======= CBPA =======
.
1. PLEASE REVISE STEP 2 IN THE WORKSHEET A CALCULATIONS FOR
THE ACREAGE SPECIFIED FOR THE SUBDIVISION EXCLUDING THE
SIDEWALKS AND PARKWAY TO BE 34.14 ACRES AS OPPOSED TO 38.95
ACRES. AS A RESULT, THE LPOST APPEARS TO BE 23.60 LBS/YR IN
LIEU OF 25.91 LBS/YR.
.
THEREFORE, THE REMOVAL REQUIREMENT APPEARS TO BE 6.07
LBS/YR IN LIEU OF 8.38 LBS/YR. SUBMIT REVISED WORKSHEET A
CALCULATIONS FOR FURTHER REVIEW AND APPROVAL.
.
2. PER THE PREVIOUS COMMENT (COMMENT #1), PLEASE REVISE THE
CBPA/MS-4 TABLE (SHEET CBPA) TO REFLECT 6.07 LBS/YR AS
OPPOSED TO 8.38 LBS/YR IN THE REQUIRED REMOVAL FOR THE
SITE.
.
IN ADDITION, REVISE THE WORDING IN THE 3RD ROW IN THE
CBPA/MS-4 TABLE THAT STATE "REQUIRED REMOVAL (RR) FOR THE
SITE (LBS)" TO BE "0.45 LBS/YR REQUIRED REMOVAL (RR) FOR
THE SITE (LBS)".
.
3. PLEASE INCREASE THE LETTER SIZE FOR LABELING THE BMP'S
#4, SOUTH BMP'S #1 THRU #3 ON THE PLAN VIEW (SHEET CBPA) TO
BE MORE LEGIBLE.
.
4. REVISE THE PLAN VIEW (SHEET CBPA) TO DEPICT THE LIMITS
OF THE WETLANDS AND RPA'S.
.
5. THESE ARE IN REGARDS TO THE CBPA CALCULATIONS TABLE
(SHEET CBPA):
.
A) THE CBPA CALCULATIONS TABLE SHOULD ONLY SHOW THE
PREVIOUSLY APPROVED SECTIONS OF THE HARPERS MILL
SUBDIVISION EXCEPT FOR THE SECTION THAT IS CURRENTLY
UNDER REVIEW. IN THIS CASE HARPERS MILL NW SECTION 5
SHOULD BE INCLUDED IN THE TABLE.
.
HARPERS MILL NE SECTION 9 SHOULD BE REMOVED FROM THE
TABLE, SINCE IT HAS NOT BEEN APPROVED YET FROM THE
HARPER MILL NW SECTION 5.
B) PLEASE REVISE THE LOAD REMOVE FOR SOUTH BMP#3 TO BE
11.76 LBS/AC/YR AS OPPOSED TO 14.66 LBS/AC/YR. BE SURE
TO CORRECT THE TOTAL LR AND THE ACCUMULATED LR FOR THE
SOUTH BMP#3 AND THE SUBSEQUENCE SECTIONS AFTER SOUTH
BMP#3.
.
6. PLEASE REVISE THE GENERAL NOTE 7 (SHEET C1.0) TO INCLUDE
2009-2014 VSMP PERMIT NO. ________, 2014-2019 VSMP PERMIT
NO. ________.
.
7. PLEASE REVISE THE CBPA COMPLIANCE NOTE ITEM #8 UNDER
GENERAL NOTES (SHEET C1.0) TO REMOVE THE LAST PORTION THAT
REFERS TO "TOTAL IMPERVIOUS AREA TO USE FOR PRO-RATA
CONTRIBUTION IS 2.78 ACRES.
.
======= 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. BMP#2 SHOWN IN THE APPROVED OVERALL CBPA COMPLIANCE PLAN
MUST BE CONSTRUCTED IN CONJUNCTION WITH THE FIRST PROPOSED
SECTION THAT DRAINS IN ITS DIRECTION. THIS IS A PRE-
REQUISITE TO PLAN APPROVAL. A FURTHER DISCUSSION IS
RECOMMENDED.
.
IN ADDITION, PLEASE LABEL THE BMP#2 IN THE CBPA PLAN SHEET.
.
BE AWARE THAT THE SWM/BMP EASEMENT AND THE LIMITS OF THE
50' VEGETATIVE PERIMETER YARD SETBACK PERTINENT TO BMP#2
MAY AFFECT LOTS 17 THRU 19 OF HARPER'S MILL NORTHWEST
SECTION 3, SINCE THIS BMP IS LOCATED ADJACENT TO THESE
LOTS.
.
3. PER TENTATIVE CONDITION #26, WHICH STATES, "APPROVAL OF
THE ROAD AND DRAINAGE PLANS BY PLANTATION PIPELINE IN
RELATION TO ITS EASEMENT AND FACILITIES THEREIN IS A
PREREQUISITE TO CONSTRUCTION PLAN APPROVAL."
.
4. PLEASE INDICATE WITH ARROWS, THE DIRECTION OF FLOW ALONG
THE NATURAL DRAINAGEWAYS/WETLAND AREAS, PROPOSED DITCHES,
IN ALL GUTTERS, SURFACE DRAINAGE, ETC. REFLECT THE CHANGES
ON ALL APPLICABLE SHEETS.
.
5. PLEASE SHOW THE NORTH ARROW ON SHEET C5.6.
.
6. PLEASE BE SURE TO SHOW THE STIPPLE PATTERN ON ALL
PROPOSED ROADS FOR THIS SECTION (I.E. HARPPER MILL PARKWAY,
SAWPER ROAD, BRENTOR WAY, BRENTOR COURT, ETC.).
.
7. PLEASE REVISE THE LIMITS OF THE EXISTING RIGHT-OF-WAY
ALONG HARPERS MILL PARKWAY TO ELIMINATE THE LINE THAT
CROSSES THE STUB ROADS IN THE PROXIMITY OF STATIONS 26+50
TO 27+00, 32+00 TO 32+50, ETC. REVISE ALL APPLICABLE PLAN
VIEWS TO REFLECT THE CHANGES.
.
IN ADDITION, PLEASE LABEL THE DEDICATED 90' RIGHT-OF-WAY
ALONG HARPERS MILL PARKWAY ON ALL APPLICABLE PLAN VIEWS.
.
8. PLEASE PROVIDE EC-1 WITH PERTINENT INFORMATION (I.E.
WIDTH, LENGTH AND 24" THICK LAYER OF EC-1 RIPRAP OVER
FILTER FABRIC) AT THE BEGINNING OF THE STORM
SEWERS/CULVERTS STR'S C1 THRU C7. REFLECT THE CHANGES ON
THE PLANS AND PROFILES.
.
9. PLEASE LABEL THE TEMPORARY TURNAROUND EASEMENT LOCATED
AT THE OF SCOLERS DRIVE AS "45' TEMPORARY TURNAROUND
EASEMENT". REFLECT THE CHANGES ON ALL APPLICABLE SHEETS.
.
10. PLEASE PROVIDE LOT FILLING AND GRADING ON LOT 40 TO
ELIMINATE THE LOW DEPRESSION IN THE PROXIMITY OF 272.00 THRU
269.00 CONTOURS-ELEVATIONS. BE SURE THE OVERALL GRADING IS
GRADED TO ALLOW THE RUNOFF WATER TO SHEET FLOW OVER THE
ROAD.
.
IN ADDITION, ANNOTATE THIS LOT WITH "NBP" AND REFLECT THE
CHANGES ON ALL APPLICABLE SHEETS.
.
11. PLEASE BE SURE TO SHOW THE 1' EXISTING CONTOURS IN ITS
ENTIRETY AS OPPOSED TO BE PARTIALLY SHOWN. FOR EXAMPLE, THE
EXISTING 269.00 CONTOUR-ELEVATION STOP IN THE VICINITY OF
LOT 2. REFLECT THE CHANGES ON ALL APPLICABLE SHEETS (I.E.
SHEETS C2.0 THRU C2.6, C5.0 THRU C5.4, C5.6 THRU C5.7,
ETC.).
.
12. PLEASE LABEL THE PROPOSED LOTS WITH NUMBERS ON SHEETS
C5.0 THRU C5.4, ETC.
.
13. PLEASE ANNOTATE LOT 19 WITH "NBP" AND PROVIDE A NOTE TO
THIS LOT STATING, "NBP ON LOT 19 UNTIL THE PROPOSED GRADING
NEAR THIS LOT HAS BEEN COMPLETED AND FIELD VERIFIED BY A
LICENSED PROFESSIONAL ENGINEERING THAT THE LIMITS OF THE
100-YEAR BACKWATER ARE OUTSIDE OF LOT 19. REFLECT THIS NOTE
ON THE ROAD PLANS, GRADING PLANS, ETC.
.
14. PLEASE REVISE THE NUMBERING OF TENTATIVE CONDITION IN
ITEM 15 UNDER GENERAL NOTES (SHEET C1.0) TO BE #24 AS
OPPOSED TO #25. REVISE ACCORDINGLY.
.
15. SIMILARLY, THE NUMBERING FOR TENTATIVE CONDITION IN ITEM
16 UNDER GENERAL NOTES (SHEET C1.0) APPEARS TO BE #32 AS
OPPOSED TO #33. REVISE ACCORDINGLY.
.
16. PLEASE LABEL THE SIDE SLOPE WITH DIRECTIONAL FLOW ARROW
ALONG THE FILL SLOPES OF THE ROAD TEMPLATE THAT ARE OUTSIDE
THE RIGHT-OF-WAY LIMITS. REFLECT THE CHANGES ON ALL
APPLICABLE SHEETS.
.
17. BASED ON NOTE #10 (SHEET C3.2), PLEASE ANNOTATE ON THE
PLAN VIEWS LOTS 26 THRU 32 WITH "NBP". REFLECT THE CHANGES
ON ALL APPLICABLE SHEETS.
.
18. PLEASE SPECIFY IN THE STORM SEWER DESCRIPTION AT STR. 85
TO BE PRE-CAST. SINCE, INLET SHAPING HAS BEEN SPECIFIED.
.
AS A REMINDER, PIPE DIAMETER GREATER THAN 30" SHALL QUALIFY
FOR 50% REDUCTION ONLY IF PRECAST MANHOLE TEES AND ELBOWS
SPECIFIED.
.
19. THESE ARE IN REGARDS TO THE DITCHES LOCATED ON THE REAR
OF LOTS 38 THRU 40 AND 33 THRU 34:
.
A) REVISE THE RUNOFF COEFFICIENT TO USE THE ULTIMATE
DEVELOPED CONDITION OF 0.4 AS OPPOSED TO 0.29/0.25
RESPECTIVELY AND SUBMIT 10/100-YEAR DITCH CALCULATIONS
FOR FURTHER REVIEW AND/OR APPROVAL.
.
B) THE 100-YEAR DITCH CALCULATIONS FOR THE DITCH LOCATED
ON THE REAR OF LOTS 38 THRU 40 AND 33 THRU 34 WERE
OMITTED FROM THE SUBMITTAL PACKAGE. PLEASE ADDRESS.
.
C) BASED ON THE SWALE 35 & DITCH LOT 35-36 PROFILE
(SHEET C4.12) DOES NOT SHOW AT LEAST 1' OF CONTAINMENT
IN THE PROXIMITY OF STATIONS 3+50 TO APPROXIMATELY 4+30.
REVISE ACCORDINGLY AND REFLECT THE CHANGES ON ALL
APPLICABLE SHEETS.
.
IN ADDITION, BE SURE THE OUTLET PROTECTION IS PLACED AT
0% SLOPE AS OPPOSED TO BE SHOWING ON A SLOPE.
ADDITIONALLY, REVISE THE LABELING OF THIS OUTLET
PROTECTION TO BE "20'X 20'X2' OF RIPRAP OVER FILTER
FABRIC AT 0% SLOPE". REFLECT THE CHANGES ON THE PLANS
AND PROFILES.
.
FURTHERMORE, BE SURE TO LABEL THE CENTERLINE STATIONING
EVERY 100' ALONG THE CENTERLINE OF THIS DITCH ON THE
PLAN VIEWS AND BE SURE THE STATIONING SHOWN ON THE PLAN
VIEWS MATCHES WITH THE STATIONING SHOWN THE PROFILE OF
THIS DITCH.
.
D) SIMILARLY, PLEASE REVISE THE DITCH LOT 38-40 (SHEET
C4.12) TO SPECIFY A LEAST 1' OF CONTAINMENT IN THE
PROXIMITY OF STATION 2+20 TO 3+00 AND REVISE THE OUTLET
PROTECTION TO BE PLACED AT 0% SLOPE.
.
THE NOTE REGARDING THE ENERGY DISSIPATER SHOULD BE
REVISED TO STATE, "13'X12'X2' OF RIPRAP OVER FILTER
FABRIC AT 0% SLOPE". REFLECT THE CHANGES ON ALL
APPLICABLE SHEETS.
.
E) A NOTE SHOULD BE PROVIDED IN BOLD PRINT ON THE ROAD
PLANS AND GRADING PLANS FOR ALL PROPOSED DITCHES ENCLOSE
IN COUNTY EASEMENTS STATING, "IF UNABLE TO ACHIEVE
SUITABLE STAND OF GRASS VEGETATION OR FAILS TO PROVIDE
POSITIVE DRAINAGE OR SECTIONS NOT MAINTAINED, UP TO 1
YEAR AFTER THE STATE ACCEPTANCE OF THE ROAD EE MAY
REQUIRE THE DITCH TO BE PAVED (PG-2A)."
.
20. PLEASE SPECIFY 10' TEMPORARY CONSTRUCTION EASEMENT FOR
THE FUTURE EXTENSION OF THE CROWLET DRIVE TO BE SPECIFIED ON
BOTH SIDES OF THIS ROAD IN THE PROXIMITY OF STATION 20+00
UNTIL IT REACHES THE PROPERTY LINE. REFLECT THE CHANGES ON
ALL APPLICABLE SHEETS.
.
21. PER TENTATIVE CONDITION #34, PLEASE EXTEND THE ROAD
IMPROVEMENT PERTINENT TO CROWLET DRIVE WITHIN 10' OF THE
PROPERTY LINE. REFLECT THE CHANGES ON THE PLANS AND
PROFILES, ETC.
.
22. DISCREPANCIES WERE FOUND IN LABELING THE STATIONING
ALONG THE CENTERLINE OF THE PROPOSED ROADS WHEN COMPARING
THE ROAD PLANS WITH THE ENLARGED DETAIL OF THE ROAD (SHEET
C3.4) FOR HARPERS MILL PWY & SAWPER ROAD INTERSECTION,
HARPERS MILL PWY & A FUTURE ROAD INTERSECTION, HARPER MILL
PWY & CROWLET DRIVE INTERSECTION, ETC. REVISE ACCORDINGLY.
.
IN ADDITION, REVISE THE SPELLING IN THE TITLE FOR THE
ENLARGED DETAIL HARPERS MILL PW & SAWPER ROAD INTERSECTION
(SHEET C3.4) TO BE "SAWPER" AS OPPOSED TO "SAMPER". REVISE
ACCORDINGLY.
.
BE SURE TO LABEL ALL THE 1' EXISTING/PROPOSED CONTOURS ON
SHEET C3.4.
.
23. PLEASE REVISE THE HARPER MILLS PARKWAY X-SECTIONS (SHEET
C4.13 THRU C4.16 TO SHOW/LABEL THE PROPERTY LINE, ETC. IN
ADDITION, BE SURE TO SHOW THE FILL/CUT SECTION TYING BACK TO
THE EXISTING GROUND (I.E. X-SECTIONS 21+00, 23+00, 23+5,
32+50, 33+50, 38+50, 39+00 THRU 40+50, ETC. REVISE
ACCORDINGLY.
.
24. PLEASE SHOW/LABEL THE LIMITS OF INCREMENTAL DRAINAGE
AREAS WITH AMOUNT OF ACREAGE THAT DRAINS TO THE PROPOSED
CULVERT STR. C1 ON THE CONSTRUCTION PLANS.
.
IN ADDITION, ESTABLISH THE 100-YEAR FLOODPLAIN ON THE
UPSTREAM OF THIS CULVERT AT THE PROPERTY LINE TO VERIFY IF
THE 100-YEAR BACKWATER LIMITS ARE WITHIN THE LIMITS OF THE
100-YEAR FLOODPLAIN. OTHERWISE, IF THE 100-YEAR BACKWATER
LIMITS EXTEND BEYOND THE LIMITS OF THE 100-YEAR FLOODPLAIN,
100-YEAR BACKWATER EASEMENT IS REQUIRED.
.
SUBMIT 100-YEAR HYDROLOGIC/HYDRAULIC CALCULATIONS WITH
SCALED X-SECTIONS FOR FURTHER REVIEW/APPROVAL, AND REVISE
THE PLANS TO REFLECT THE CHANGES.
.
25. SIMILARLY, PLEASE PROVIDE ONE MORE 100-YEAR FLOODPLAIN
SECTION-LOCATION WITH ELEVATION TO EXTEND THE 100-YEAR
FLOODPLAIN LIMITS TO THE PROPERTY LINE ON THE UPSTREAM SIDE
OF THE PROPOSED CULVERT STR. C2 TO VERIFY IF THE 100-YEAR
BACKWATER LIMITS ARE WITHIN THE LIMITS OF THE 100-YEAR
FLOODPLAIN.
.
AS A REMINDER, 100-YEAR BACKWATER EASEMENT IS REQUIRED, IF
THE 100-YEAR BACKWATER LIMITS EXTEND BEYOND THE LIMITS OF
THE 100-YEAR FLOODPLAIN LIMITS.
.
FURTHERMORE, SUBMIT 100-YEAR HYDROLOGIC/HYDRAULIC
CALCULATIONS WITH SCALED X-SECTIONS FOR FURTHER
REVIEW/APPROVAL AND REFLECT THE CHANGES ON ALL APPLICABLE
SHEETS.
.
26. PLEASE REMOVE A PORTION OF THE LIMITS OF THE 100-YEAR
BACKWATER PERTINENT TO CULVERT STR. C3 THAT IS WITHIN THE
LIMITS OF THE 100-YEAR FLOODPLAIN BETWEEN THE 100-YEAR
FLOODPLAIN X-SECTIONS C-C AND D-D. SINCE THE LIMITS OF THE
100-YEAR FLOODPLAIN ARE MORE RESTRICTIVE.
.
27. PLEASE EXTEND THE LIMITS OF THE 100-YEAR FLOODPLAIN NEAR
THE OUTFALL PIPE STR. 1/OUTLET PROTECTION TO COMPLY WITH
FLOOD PROTECTION. REFLECT THE CHANGES ON THE PLANS AND
PROFILES.
.
28. THESE ARE IN REGARDS TO THE 100-YEAR FLOODPLAIN ANALYSIS
PLAN (SHEETS C5.6 AND C5.7):
.
A) PLEASE LABEL THE 100-YEAR FLOODPLAIN SECTIONS-
LOCATIONS AA THRU YY ON THE PLAN VIEWS (SHEETS C5.6,
C5.7, ETC.).
.
B) THIS OFFICE WAS NOT ABLE TO VERIFY THE LIMITS
DRAINAGE AREAS/DRAINAGE BREAKS AND PATTERNS, ETC. SINCE
THE EXISTING DRAINAGE FEATURES, EXISTING DEVELOPMENT,
ROADS, ETC. WERE OMITTED FROM THE PLAN VIEWS. REFER TO
THE FOLLOWING CONCERNS:
.
B.1) PLEASE DEPICT THE EXISTING ROADS/RIGHT-OF-WAY
PERTINENT TO HULL STREET AND BALDWIN CREEK ROAD WITH
APPLICABLE DRAINAGE FEATURES (I.E. CULVERTS, ROADSIDE
DITCHES, ETC.) TO VERIFY DRAINAGE BREAKS/PATTERNS.
.
B.2) SHOW THE EXISTING HAMPTON FARMS SUBDIVISION WITH
THE LOT LINES, HOUSES/DRIVEWAYS, ROADS, DITCHES,
OUTFALL PIPES, POND, ETC. TO VERIFY DRAINAGE BREAKS,
RUNOFF COEFFICIENTS, ETC.
.
B.3) SHOW THE EXISTING HOUSES/PONDS/DRIVEWAYS/ETC. AT
8101/ 8211/8231/8331/8511/8601/8701 BALDWIN CREEK ROAD.
INCLUDE THE LOT LINES, INDICATE WITH ARROW THE
DIRECTION OF FLOW ALONG THE STREAMS, DITCHES, ETC.
THESE AREAS HAVE BEEN DESIGNATED AS SUBURBAN
RESIDENTIAL I.
.
BASED ON THE GIS MAP, THE PRIVATE PONDS LOCATED AT 8101
BALDWIN CREEK ROAD AND 8211 BALDWIN CREEK ROAD APPEAR
TO BE DRAINING TOWARDS THE POND LOCATED ON HAMPTON
FARMS SUBDIVISION.
.
CONSEQUENTLY, THE LIMITS OF DRAINAGE AREAS PERTINENT TO
X-SECTION J-J SHOULD ACCOUNT FOR THIS AREA. REVISE
ACCORDINGLY. SUBMIT REVISED 100-YEAR FLOODPLAIN
CALCULATIONS WITH SCALED X-SECTIONS AND 10/100-YEAR
CULVERT CALCULATIONS AT STR. C7 FOR FURTHER REVIEW AND
APPROVAL.
.
FURTHERMORE, PER THE PREVIOUS COMMENT, PLEASE SUBMIT
REVISED 100-YEAR FLOODPLAIN CALCULATIONS AT X-SECTIONS
N-N THRU U-U WITH SCALED X-SECTIONS FOR FURTHER REVIEW
AND APPROVAL.
.
IN ADDITION, REFLECT THE CHANGES ON ALL APPLICABLE
SHEETS.
.
B.4) SHOW THE APPROXIMATE LOCATION OF THE STREAMS.
PLEASE REFER TO THE CHESTERFIELD COUNTY GIS.
.
C) REVISE SHEET C5.7 TO INCREASE THE LETTER SIZE TO BE
MORE LEGIBLE FOR LABELING THE PROPERTY OWNERS, LOT
NUMBERS, LABELING THE SHEETS IN THE MATCH LINE,
ELEVATIONS ALONG SOME EXISTING CONTOURS, ETC.
.
D) IT WOULD BE HELPFUL TO SHOW THE LABELING OF THE 100-
YEAR FLOODPLAIN SECTIONS-LOCATIONS TO BE PARALLEL AND
CLOSER TO THE X-SECTION LINES AS OPPOSED TO BE SHOWN ON
SOME PERPENDICULAR AND/OR FAR FROM THE X-SECTION LINES.
.
IN ADDITION, THE LABELING OF THESE X-SECTIONS SHOULD BE
SHOWN A LITTLE DARKER TO BE DIFFERENTIATED FROM OTHER
FEATURES. PERHAPS, THE PROPOSED STORM SEWER SHOULD BE
SHOWING DARKER THINNER LINES. REFLECT THE CHANGES ON
SHEET C5.7.
.
E) PLEASE REVISE SHEETS C5.6 AND C5.7 TO LABEL THE
EXISTING CONTOURS WITH ELEVATIONS ON THE EASTERN AND
SOUTHERN SIDE WITHIN THE PROJECT LIMITS AND OUTSIDE THE
PROJECT LIMITS ONLY FEW OF THE CONTOURS HAVE BEEN
LABELED. OR LABEL THE EXISTING CONTOURS WITH ELEVATIONS
MORE FREQUENTLY OR PREFERABLY LABEL THE EXISTING
CONTOURS WITHIN EACH DRAINAGE AREAS. REVISE
ACCORDINGLY.
.
F) PLEASE SHOW/LABEL THE FLOW PATH (I.E. SHEET FLOW,
SHALLOW CONCENTRATED FLOW, CHANNEL FLOW, ETC.) ON
SHEETS C5.6 AND C5.7.
.
G) PLEASE REVISE THE LIMITS OF DRAINAGE AREAS PERTINENT
TO X-SECTION A-A TO INCLUDE THE HIGH POINT WITHIN THE
325.00 CONTOUR-ELEVATION (SHEET C5.6). SUBMIT REVISED
HYDROLOGIC AND HYDRAULIC CALCULATIONS AT X-SECTION A-A
THRU H-H/V-V THRU Y-Y WITH SCALED X-SECTIONS AND REVISE
THE PLANS, ETC. TO REFLECT THE CHANGES.
.
H) DISCREPANCIES WERE FOUND WHEN COMPARING THE DRAINAGE
AREAS USED TO ESTABLISH THE 100-YEAR FLOODPLAIN AT X-
SECTION V-V OF 9.43 ACRES WITH THE CULVERT ANALYSIS
PERTINENT TO STR. C4 OF 8.48 ACRES. BE SURE THE
DRAINAGE AREAS, TIME OF CONCENTRATION, ETC. ARE THE
SAME. AS APPLICABLE, REVISE THE 100-YEAR FLOODPLAIN
CALCULATIONS AT X-SECTIONS V-V THRU Y-Y, 10/100-YEAR
CULVERT CALCULATIONS PERTINENT TO STR. C4, DRAINAGE
AREAS, ETC. AND REFLECT THE CHANGES ON THE PLANS,
PROFILES, ETC.
.
29. PLEASE REVISE THE X-SECTIONS A-A THRU Y-Y TO INCLUDE
HYDRAULIC INFORMATION OF THE CHANNEL AT EACH X-SECTION
(SHEET C5.9), SUCH AS: Q100, D100, SLOPE, MANNING'S
ROUGHNESS COEFFICIENT, ETC.
.
30. PLEASE CLARIFY IF THE GHOSTED 100-YEAR FLOODPLAIN
SECTIONS-LOCATIONS WITH ELEVATIONS SHOWN ALONG THE NATURAL
DRAINAGEWAY THAT IS LOCATED ON THE REAR OF LOTS 6 THRU 12
WERE APPROVED WITH PREVIOUS SECTIONS. IF THAT IS THE CASE,
REVISE THE LABELING OF THE GHOSTED 100-YEAR FLOODPLAIN
SECTIONS-LOCATIONS TO REFER THE APPROVED SUBDIVISION SECTION
CONSTRUCTION PLANS.
.
OTHERWISE, SUPPORT CALCULATIONS OF THE 100-YEAR FLOODPLAIN
WITH SCALED X-SECTION MUST BE SUBMITTED TO THIS OFFICE FOR
APPROVAL. A FURTHER DISCUSSION IS RECOMMENDED.
.
IN ADDITION, SHOW/LABEL THESE GHOSTED 100-YEAR FLOODPLAIN
SECTIONS-LOCATIONS WITH ELEVATIONS ON SHEETS C5.6, ETC.
.
AS A REMINDER, ONCE THE DRAINAGE AREAS USED TO ESTABLISH THE
100-YEAR FLOODPLAIN HAS BEEN SATISFACTORILY APPROVED, BE
SURE TO UPDATE THE MFF'S SPECIFIED ON SEVERAL LOTS.
.
31. PLEASE REVISE THE MFF SPECIFIED ON LOT 37 TO BE
MFF(SAG)=266.50. REFLECT THE CHANGES ON ALL APPLICABLE
SHEETS.
.
32. PLEASE SPECIFY MFF ON LOT 38 TO BE "MFF(SAG)=266.50".
REFLECT THE CHANGES ON ALL APPLICABLE SHEETS.
.
33. PLEASE REVISE THE MFF(FP) SPECIFIED ON LOT 13 TO BE
MFF(FP)=256.00 AS OPPOSED TO MFF(FP)=251.53. REFLECT THE
CHANGES ON ALL APPLICABLE SHEETS.
.
34. SIMILARLY, PLEASE REVISE THE MFF(FP) SPECIFIED ON LOT 7
TO BE 244.00 AS OPPOSED TO 240.00. REFLECT THE CHANGES ON
ALL APPLICABLE SHEETS.
.
35. A SIMILAR SITUATION EXISTS ON LOT 23, REVISE THE MFF(FP)
TO BE 254.00 AS OPPOSED TO 251.53. REFLECT THE CHANGES ON
ALL APPLICABLE SHEETS.
.
36. PLEASE REVISE THE MFF SPECIFIED ON LOT 3 TO BE THE ROAD
SAG. IT SHOULD BE LABELED AS "MFF(SAG)=249.00". REFLECT THE
CHANGES ON ALL APPLICABLE SHEETS.
.
37. PLEASE SPECIFY MFF(SAG) ON LOT 29 TO BE 252.64. REFLECT
THE CHANGES ON ALL APPLICABLE SHEETS.
.
38. PLEASE SPECIFY MFF(FP) ON LOT 26 TO BE 257.00. REFLECT
THE CHANGES ON ALL APPLICABLE SHEETS.
.
39. PLEASE PERFORM A DAM FAILURE ANALYSIS DURING THE 100-
YEAR STORM EVENT FOR THE EXISTING POND LOCATED ON HAMPTON
FARMS.
.
INCLUDE SUPPORT CALCULATIONS, SHOW/LABEL THE 100-YEAR DAM
FAILURE SECTIONS-LOCATIONS WITH ELEVATIONS ALONG THE NATURAL
DRAINAGEWAY LOCATED IN THE PROXIMITY OF THE PROPOSED LOTS 27
THRU 31, SHOW/LABEL THE LIMITS OF THE DAM FAILURE ON THE
PLANS, ETC.
.
IF THE LIMITS OF THE 100-YEAR DAM FAILURE ENCROACH ON THE
PROPOSED LOTS, BE SURE TO SPECIFY MFF(DF) ELEVATION 1' ABOVE
THE DAM FAILURE. REFLECT THE CHANGES ON ALL APPLICABLE
SHEETS.
.
IN ADDITION, THIS OFFICE MUST RECEIVE A LETTER SIGNED BY A
LICENSED PROFESSIONAL ENGINEER CERTIFYING THIS ANALYSIS OF
THE DAM FAILURE.
.
40. SIMILARLY, IT APPEARS A DAM FAILURE ANALYSIS DURING A
100-YEAR STORM EVENT MAY BE NEEDED TO THE EXISTING POND
LOCATED ON 8231 BALDWIN CREEK ROAD.
.
AS APPLICABLE, SUBMIT SUPPORT CALCULATIONS, SHOW/LABEL THE
100-YEAR DAM FAILURE SECTIONS-LOCATIONS WITH ELEVATIONS,
SHOW/LABEL THE LIMITS OF THE DAM FAILURE ON THE PLANS, ETC.
AND SUBMIT A LETTER SIGNED BY A LICENSED PROFESSIONAL
ENGINEER CERTIFYING THIS ANALYSIS OF THE DAM FAILURE.
.
IN ADDITION, SPECIFY MFF(DF) TO BE 1' ABOVE THE DAM FAILURE
TO THE AFFECTED LOTS. REFLECT THE CHANGES ON ALL APPLICABLE
SHEETS.
.
41. THESE ARE IN REGARDS TO THE PROFILES:
.
A) PLEASE PROVIDE AN APPROVABLE ROAD DESIGN PROFILE OF
APPROXIMATELY 300' BEYOND CONSTRUCTION LIMITS TO THE
PROPOSED STUB ROADS IN THE PROXIMITY OF STATIONS 26+80,
32+20, ETC. OFF OF HARPERS MILL PARKWAY, AT THE END OF
HAPPERS MILL PARKWAY, CROWLET DRIVE, ETC. INCLUDE
EXISTING GROUND LEFT/RIGHT 25' OFF CENTERLINE, PROPOSED
GRADE WITH PERTINENT INFORMATION LOW/HIGH POINT, CURVE
DATA, LABEL THE LIMITS OF THE PROPERTY LINE, ETC. ON THE
PROFILES AND BE SURE TO LABEL THE END CONSTRUCTION WITH
PERTINENT STATIONING ON ALL APPLICABLE PROFILES.
.
ADDITIONALLY, BE SURE TO SHOW THE PROPOSED GRADE
PERTINENT TO CRAWLET DRIVE AT THE END OF CONSTRUCTION
TYING BACK TO THE EXISTING GROUND.
.
IN ADDITION, BE SURE TO SHOW THE TEMPORARY ENERGY
DISSIPATER SPECIFIED TO THE STUB ROADS IN THE PROXIMITY
OF STATIONS 26+80, 32+20, ETC. WITH PERTINENT
INFORMATION AND BE SURE TO SHOW THE PROPOSED GRADE TYING
BACK TO THE EXISTING GRADE AT THE END OF THIS TEMPORARY
ENERGY DISSIPATER.
.
B) PLEASE REVISE ALL APPLICABLE PROFILES (I.E. STORM
STR. 5-1, STORM STR. 19-17, STORM STR. 29-25, STORM STR.
61-53, STORM STR. 81-77, CULVERT 3 THRU CULVERT 7, ETC.)
TO SHOW THE OUTLET PROTECTION AT 0% SLOPE.
.
IN ADDITION, LOWER THE INVERT OUT AT STR'S 27, 55, 79,
ETC. TO REDUCE THE OUTLET FLOW VELOCITIES. REVISE THE
PLANS, PROFILES, AND COMPUTATION SHEETS TO REFLECT THE
CHANGES.
.
C) IT APPEARS TO BE A TYPO FOR SPECIFYING THE LENGTH OF
OUTLET PROTECTION IN SEVERAL PROFILES (I.E. STORM STR.
19-17 PROFILE, STORM STR. 29-25 PROFILE, STORM STR. 61-
53 PROFILE, STORM STR. 81-77 PROFILE, STORM STR. 95-91
PROFILE, ETC.), WHICH ARE CURRENTLY SHOWING WITH THE
SYMBOL IN INCHES (") AS OPPOSED TO FEET ('). REVISE
ACCORDINGLY.
.
D) PLEASE EXTEND THE EXISTING GROUND BELOW STR. 7 TO
INCLUDE PART OF THE EXISTING CHANNEL. REFLECT THE
CHANGES IN THE STORM STR. 15-7 PROFILE (SHEET C4.4).
.
E) SIMILARLY, PLEASE REVISE ALL APPLICABLE PROFILES
(I.E. STORM STR. 37-33 PROFILE, STORM STR. 51-45
PROFILE, STORM STR. 69-63 PROFILE, ETC.) TO EXTEND THE
EXISTING GROUND WITH SUFFICIENT DISTANCE TO INCLUDE PART
THE EXISTING CHANNEL.
.
F) PLEASE BE SURE TO SHOW/LABEL THE LIMITS OF THE 100-
YEAR FLOODPLAIN, WETLANDS, CONSERVATION EASEMENT,
PROPERTY LINE, ETC. ON ALL APPLICABLE PROFILES.
.
42. 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.
.
C) PER TENTATIVE CONDITION #26, WHICH STATES, "A
QUITCLAIM TO VDOT OR A SATISFACTORY COMMITMENT THEREOF
BY PLANTATION PIPELINE FOR THE LOCATION WHERE HARPERS
MILL PARKWAY, SAWPER ROAD, PETHERWIN LANE, SHELDON
DRIVE, LONGLANDS ROAD, PULLMAN LANE, AND OTTERDALE ROAD
RIGHT-OF-WAY WILL CROSS THE PLANTATION PIPELINE EASEMENT
SHALL BE A PREREQUISITE TO SUBDIVISION PLAT
RECORDATION."
.
D) PER TENTATIVE CONDITION #33, WHICH STATES, "PRIOR TO
RECORDATION, THE ENVIRONMENTAL ENGINEERING DEPARTMENT
MUST HAVE RECEIVED NOTIFICATION FROM VDOT THAT
IMPROVEMENTS PER THE APPROVED TRANSPORTATION IMPROVEMENT
PHASING PLAN OR TWO THOROUGHFARE ROAD(S) INTO WHICH
INDIVIDUAL SECTIONS OF THIS PROJECT INTERSECTS HAVE BEEN
SATISFACTORILY COMPLETED.
.
==========================================================

Go to Case Selection Form or Go to Project List