HomeMy WebLinkAboutSDP201100043 Review Comments Final Site Plan and Comps. 2011-07-15From: DeNunzio, Joel D., P.E. [mailto: Joel .DeNunzio @VDOT.virginia.gov]
Sent: Friday, July 15, 2011 1:53 PM
To: Bill Fritz
Cc: Nat Perkins; Jo Higgins; John Paul Diez
Subject: Re- Store'n Station
have reviewed the referenced site plan and have the following comments:
Typical Sections:
Label the typical rural section a GS -2 VDOT Standard and the urban typical a GS -6 Standard.
2. The GS -2 Standard has a front ditch slope of 10 feet for the 55 mph section. The front ditch slope
of 6 feet is adequate for the 45 mph section.
3. The GS -2 shoulder is 10 feet in total width with 8 feet of the shoulder paved.
4. The cut and fill slope for the GS -2 standard is a CS -4 type.
5. The 2 foot mill and overlay shown in the typical sections is in conflict with the adjacent lane mill and
overlay requirement for the WP -2 standard. The mill and overlay shown on the typical sections should be
in accordance with the WP -2 standard.
6. The typical curb section needs to show a CG -7 standard.
7. There needs to a relatively flat area behind the CG -7 at 2% sloping towards the curb that is 7.5 feet
in width prior to the proposed 2:1 cut or fill slope. This area will accommodate the 22 foot clear zone from
the edge of the through lane.
8. The proposed right turn lane needs to be 12 feet in width to the edge of the gutter pan, not the face
of curb.
9. The typical pavement section should refer to notes 1, 2 and 3 in the WP -2 standard which describes
the proper method for analyzing and designing the pavement structure. I would expect that the Route
250 pavement structure will contain a thicker section of asphalt concrete than the 5 inches that are shown
in the typical. I recommend removing the layers shown altogether.
Proposed Road Improvements Drawing:
1. The road plan will either need to show grading contours along the Route 250 widening or cross
sections every 25 feet.
2. The grading from the proposed widening may require modifications to the drop inlet located 580 feet
west of the centerline of the proposed entrance. The perpendicular 15" cmp will likely require
modification if it is a field entrance. The pipe will need to be within the new ditch line. The cover over
both of these culverts will also need to be reviewed for adequate depth and freeboard.
3. The driveway entrance 440 feet west of the proposed centerline of the entrance may need a culvert,
unless it is at a crest, in the ditch line and the entrance will probably have to be graded for the widening.
An entrance grade needs to be shown.
4. The driveway 290 feet west of the centerline will need the culvert relocated or replaced in the
proposed ditch line. Adequate cover needs to be checked. An entrance grade needs to be shown.
5. The proposed extension of the 18 inch corrugated metal pipe 214 feet west of the entrance
centerline will need to be closer to 20 feet instead of 10 to get to the proposed ditch line. There needs to
be a note on the plan for the extension that a VDOT inspector will be contacted prior to extending and
covering this culvert to ensure that the existing pipe is in good condition to allow for the extension. The
cover on this pipe needs to be shown and the drainage calculation needs to be shown to ensure it meets
the minimum standards.
6. 1 recommend continuing curb and gutter from the proposed entrance to the entrance to Freetown
Lane. If you construct the ditch line to the typical section, you will be very close to the right of way line.
7. A driveway culvert will probably be needed under the Freetown Lane entrance.
8. It appears there are 3 commercial entrances and one field entrance to the east of the site that will
need to be re- constructed or graded with the widening of the road. Culverts will need to be evaluated for
each of these entrances.
9. You should show cross hatching on the plan where the mill and overlay is proposed for the WP -2
standard.
Dimension and Striping Plan:
1. A striping plan denoting all pavement markings, types and colors of lines and materials needs to be
shown in accordance with the MUTCD and the VDOT Road and Bridge Specifications.
2. The curb returns at the entrance need to be a minimum of 45 feet in accordance with table 4 -1 in
appendix F of the VDOT Road Design Manual. The exiting radius of the curb and gutter can be less as
long as the effective radius to the through lane is a minimum of 45 feet.
3. The angle break for the east through lane transition needs to occur at the eastern most point of the
full width left turn lane. That will provide the 525 foot transition needed for the 45 mph speed.
General:
Drainage computations will be required in accordance with the VDOT Drainage Manual.
2. Show entrance profiles for all entrances within the proposed widening on the south side of the road.
3. The access easement is in the proper location.
4. A drainage easement to the outfall will be determined if needed when detailed road and drainage
plans are submitted.
5. The note on the site plan for the access easements should be in accordance with the details
previously sent from Bill Fritz at Albemarle County.
Please let me know if you have any questions.
Thanks
Joel
Joel DeNunzio, P.E.
VDOT Culpeper
Land Development
434 - 589 -5871
joel.denunzio @vdot.virginia.gov