HomeMy WebLinkAboutSUB201500020 Review Comments Road Plan and Comps. 2015-03-18 (2)�pF A
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COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
Project:
Old Trail Village - Block 12, Phase 2
Plan preparer:
Roudabush, Gale & Assoc., Inc [914 Monticello Road, Charlottesville, VA
645.50'
22902, cmulligan(a)roudabush.com ]
Owner or rep.:
March Mountain Properties [1005 Heathercroft Circle, Suite 100, Crozet, VA
2.5' / 657.75'
22932, dave @oldtrailvillage.com]
Plan received date:
21 May 2014
(Rev. 1)
10 Feb 2015
Date of comments:
3 July, 2014
(Rev. 1)
18 Mar 2015
Reviewer:
John Anderson
New
A. Road Plan (SUB201500020 -prior design: SUB201400080)
Furnish pipe and inlet computations (inlets: spread/capacity, elevations, descriptions; pipes: flow, velocity,
L, DIA, inverts, etc). No roadway storm collection system computations or calculations are included with
Road Plan, though computations may have been submitted directly to VDOT. (Rev. 1) Addressed. As
follow -up: Using Storm Sewer Design/Hydraulic Gradeline tables (2/4/2015), it appears several sections of
pipe are surcharged during a 10 -yr event. (Unless review error) revise so system contains 10 -yr event
without surcharge.
FROM INV upper pipe DIA/top of pipe Elev. Upstream Elev. (same location)
16 to 14 (outfall)
644.25'
2.5' / 646.75'
18 to 16
645.50'
2.5' / 648.00'
18B to 18
655.25'
2.5' / 657.75'
22 to 18B
657.10'
1.25' / 658.35'
(see HGL, 2/4/2015) Diff.
< HGL Elev, 647.04 (0.29')
< HGL Elev, 648.12 (0.12')
< HGL Elev, 658.09 (0.34')
< HGL Elev, 658.48 (0.13')
As reminder, please perform checks. 10 -yr event must be contained (open channel flow capacity).
2. The profile for Rowcross Street should clearly define where the profile for Block 15 begins and ends
(VDOT comment #16, VDOT comment letter dated June 12, 2014). (Rev. 1) Addressed.
3. VDOT must approve road plans. VDOT comments sent to Applicant (project primary contact) via e-mail
attachment, 12- Jun -14. (Rev. 1) Withdrawn —no public roads.
1. Remove sheet 4, Site Plan, from Road Plan. Retain/preserve plan notes, as appropriate.
2. If retain sheet 4 Notes, delete Note 5.
Engineering Review Comments
Page 2 of 3
3. Replace roll top curb detail, sheet 13, with VDOT roll -top detail. Details are nearly identical.
VDOT roll -top curb detail/VDOT Road Design Manual, App. B(t) -4.G.
http: / /www.extranet .vdot.state.va.us /locdes /Electronic Pubs /2005 %20RDM /AppendB(l).pd f
Fore or Curb Invert Lift
T f�f
R-125'
ru°i neanveiV "' ,caw u+
RolYrOp Curb
FIGURE 5 - CURB AND GUTTED
4. Include VDOT Road Design Manual roll top curb Notes, at your discretion:
The following notes apply to CG -6, CG -7 and Rolltop curb:
1. Curb and gutter may be precast of Class A4 hydraulic cement concrete or cast in
place using Class A3 hydraulic cement concrete.
2. When used with stabilized, open - graded drainage layers, the bottom of the curb
and gutter shall be constructed parallel to the slope of the sub -base courses and
to the depth of the pavement but not less than the thickness shown.
5. Sheet 9/Rowcross Street profile: PVT Sta. 11 +02.50 to End Block 12/Beginning of Block 15, Sta.
12 +44.98, grade is 0.62 %. This is inconsistent with Approved block 15 road plan grade of 0.92 %. Revise.
6. Rowcross St/End block 12 Elev. 665.02' differs from Approved block 15 road plan, same location. Revise.
7. Sheet 10, storm sewer profiles: storm system is stationed, but not with road stationing. Furnish stationing
that correlates storm system DIs to road system (stationing) for review, construction, and inspection.
8. Sheet 10, Str. 18/MH requires safety slab, but safety slab (VDOT SL -1) cannot be located below any inlet
pipe of 30" diameter or greater. Revise design at this location, consistent with VDOT detail. Safety slab
required for MH depth > 12' (link:
htW: / /www. extranet . vdot.state.va.us /LocDes /Electronic_ Pubs/ 2008Standards /Section100 /106_14.pdf )
9. Include SL -1 detail (VDOT Road & Bridge Stds, 2008):
A
SL -I
SECTION A -A
y`TB
L
STRUCTURE SIZE AND
WALL THICKNESS VARIES
NOTES:
1. THE $TANDARD SAFETY SLAB ISL -111$ TO BE USED ONLY WHEN SPECIFIED IN THE PLAINS
ON THE DRAINAGE SUMMARY SHEET AND /OR THE DRAINAGE DESCRIPTION. FOR MANHOLES,
JUNCTION BOXES, ANC DROP INLETS WITH HEIGHTS GREATER THAN 12 FEET, THE SPACING OF
ADJACENT SAFETY SLABS SHALL HE 9'TO 12'WITH NO SAFETY SLAB LOCATED WITHIN 9 FEET
OF THE TOP OR BOTTOM OF THE STRUCTURE. SAFETY SLABS SHALL NOT BE LOCATED BELOW
ANY INLET PIPE OF 30" DIAMETER OF GREATER.
2. THE COST OF THE SL-11 IS INCLUDED IN THE COST OF THE STRUCTURE.
3. ACCESS OPENINGS ARE TO BE STAGGERED FROM ONE SIDE OF STRUCTURE TO THE
OTHER WHERE APPLICABLE. STEPS ARE TO BE STAGGERED ACCORDINGLY_
4. SAFELY SLAB MAY BE CAST -IN -PLACE OR PRECAST. GAST-N -PLACE CONCRETE TO BE
CLASS A3 (30 00 PSI}. PRECAST CONCRETE IS TO DE A4 (40D0 PSI. REINFDFCING
STEEL TO BE N ACCORDANCE WITH AASHTC M31,
5. ACCESS OPENINGS MAY BE 30" DIAMETER OR 30" SQUARE. WHEN STRUCTURE WIDTH IS
LESS THAN 30" THE ACCESS OPENING SHALL HE RECTANGULAR (STRUCTURE WIDTH ITY
30" LONG).
Engineering Review Comments
Page 3 of 3
SECTION B -B
SEE CAST IN PLACE DRAWINGS
FOR FURTHER DETAILS
B
r 5 BARS P IS" C -C TTP.
TYPICAL PRECAST UNIT
�VC�OT SPECIFICATION
ROAD AND BRIDGE STANDARI., ITYPICAL CONCRETE SAFETY SLAB FOR DROP INLETS, REFERENCE
SHEET 1 OF 1 REVISION DATE MANHOLES AND JUNCTION BOXES
302
106,14 VIRGINIA DEPARTMENT OF TRANSPORTATION
10. Sheet 10 /storm sewer profile 411 - #1 (outfall), and #24 - #14 (outfall): Extend existing contours beyond
pipe outfalls, if they actually extend beyond outfalls. At some point, proposed and existing should meet.
11. Sheet 10 /storm sewer profile #24 - #14 (outfall): Pipe 15 outfall appears exposed. Provide sufficient cover.
Crown of pipe should not be exposed.
12. Sheet 10 /storm sewer profile 411 - #1; profile #24 - #14: Provide VDOT end sections, pipes 2, 15.
13. Remove sheet 14.
14. Title plan set, Road Plan, not Final Site Plan.
15. Please cross - reference these Road Plan comments with Site Plan comments sent this date (identical plan set
was submitted for final site plan and road plan —we discourage this). Comments requesting removal of Lots
13 -24; sheet 3 comments; and several other comments apply to road plan and site plan alike.
Please call if any questions. 434.296 -5832 —x3069
File: SUB201500020 -Old Trail- blockl5revl- 031815