The URL can be used to link to this page

Home My WebLink AboutSDP200500113 Review Comments Letter of Revision 2 2020-02-07Phone (434) 296-5832 Project: Plan preparer: Owner or rep.: Plan received date: Date of comments: Reviewer: Project Coordinator: SDP2005-00113 pF A vincttylQ COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 22902-4596 Fax (434) 972-4126 Site Plan review, LOR Cale Elementary School Additions & Renovations (LOR2) Safe Routes to School Sidewalk Project Frank Slinsky, PE, Timmons Group, 1001 Boulders Pkwy, Suite 300 Richmond, VA 23225 [ Frank. Frank. slinsky(&timmons.com ] County of Albemarle School Board, 401 McIntire Road Charlottesville, VA 22902 [ lelass@kl2albemarle.org ] 13 Jan 2020 7 Feb 2020 John Anderson Cameron Langille 1. C1.0: Recommend list Owner information: a. County of Albemarle School Board b. FES / FPC contact i. Name individual ii. Tel. # ; email address 2. C2.0: Provide Narrative and schematic elements to accommodate pedestrian bypass across the site (N/S) during active construction, especially on the west side of Avon Street Ext. Plan must allow pedestrians that rely on existing pedestrian facilities to transit the site. 3. C3.0: Provide concrete flume detail. 4. C4.0: Since new sidewalk connecting portion of Ex. walk along Avon Street Ext. to Cale Elementary Parking Lot exceeds VDOT sidewalk standard (ref. IIM-LD-55.16, sheet 3 of 8, 5% Max. for pedestrian access routes not contained within a street or highway right-of-way; appears to exceed 10%), Engineering strongly recommends revise this portion of design to include stair with handrail, such that all portions of sidewalk outside VDOT RW are < 5%. It appears seven (7) — 8" risers would allow remaining walk to meet 5% standard. Although a portion of walk continues along Avon, and is nearly ADA-complaint, this is a safe routes to school project, and inherent risk posed to parents, children, teachers, and community with - 10% proposed grade is somewhat difficult to understand. In winter, especially, risk of fall will persist for those using this pedestrian facility, unless proposed grade is revised. Instructional & Informational Memorandum IIM-LD-55A 6 Sheet 3 of 8 The Pedestrian Access Route surfaces shall be firm, stable, and slip resistant and openings that are more than 1/2" in one dimension are prohibited. The pedestrian access route is permitted level changes up to 114" without treatment and level changes between 1/4" and 112" that are beveled with a slope no greater than 2:1. Where pedestrian access routes are contained within a street or highway right-of-way, the grade of pedestrian access routes shall not exceed the general grade established for the adjacent street or highway. Where pedestrian access routes are not contained within a street or highway right-of-way, the grade of pedestrian access routes shall be 5% maximum Engineering Review Comments Page 2 of 4 5. C4.0: Ensure proposed 4" PVC @ 2.0% Min. has sufficient cover. 6. C4.0: Provide safety fence to isolate publicly accessible areas from construction. Also, item I O.o.i.4, below. 7. C4.1 a. Provide SAF. Also, item 6, above. b. Examine sidewalk grade between proposed contours 585 and 586; this section exceeds VDOT 5% Max. grade (-6%). Revision is essential since at least one sidewalk along the E side of Avon St. Ext. serving Cale Elementary must meet ADA guidelines. Engineering recommends all sidewalk sections be designed < 5%, excepting stairs recommended for section of walk shown on C4.0. 8. C4.2 a. Provide SAF. Also, item 6, above. b. Item a., immediately above, may require chain -link SAF to separate vehicular /pedestrian paths from construction. 9. 3_1: Label existing concrete sidewalk as existing concrete sidewalk to be removed. 10. Submit WPO Plan Application (no fee required; county project): submit to reviewer's attention. While LOR comments provide advance notice of WPO plan revisions, based on this LOR, additional review comments are possible once the VSMP /WPO Plan Application is submitted. a. Application, link: hqp://www.albemarle.org/upload/images/forms_center/departments/Community Development/for ms/En ing eeringtand WPO Forms/WPO VSMP Virginia_Stormwater Management Program Application.pdf b. Submit SWPPP for project; use county template (link to template: http://www.albemarle.ora/ui)load/images/forms center/departments/Community Development/forms/E ngineering_and WPO Forms/Stormwater Pollution Prevention Plan SWPPP template.pdf): i. Include PPP Exhibit in SWPPP, Sec. 6.A. ii. Ensure named individual is listed as qualified personnel, SWPPP, Sec. 8. iii. Ensure SWPPP SIGNED CERTIFICATION is signed. iv. Ensure SWPPP, Sec. 1 is complete: 2019 VAR10 CGP Registration Statement.(Link: hLtp://www.albemarle.org/upload/images/forms center/departments/Community Develo pment/forms/En ineering_and_WPO_Forms/CGP_ Registration_ Statement _2019_FINA L 201904.pdf c. Review design criteria at https://www.swbmp.vwrrc.vt.edu/wp-content/uploads/2017/11/BMP- Spec-No-9_BIORETENTION_v1-9_03012011.pdf, VA DEQ Stormwater Design Specification No. 9 to ensure bioretention design criteria are met. d. Remove sheets C5.0, C5.1, C5.2, C6.0 — 6.4 from the LOR. These sheets (w/ VSMP/WPO plan title sheet) will constitute a VSMP /WPO plan, and cannot be approved with the LOR. e. SWM i. Provide Drainage Area maps (pre- /post -development identical, but need to show drainage divide/s). ii. Provide POA analysis. SW quantity evaluation is required at each point of post - developed site discharge. iii. Provide stormwater quantity evaluation. If site discharges to manmade facilities (pipe conveyance system) evaluate channel protection against criteria at 9VAC25-870-66.B.1. If site discharges to a natural stormwater conveyance system (defined natural feature), evaluate against criteria at 9VAC25-870-66.B.3. Evaluate to Limits of Anal; see guidance at 9VAC25-870-66.B.4. Evaluate flood protection against criteria at 9VAC25- 870-66.C. Evaluate to Limits of Analysis; guidance listed at 9VAC25-870-66.C.3. f. Revise VaRRM.xls re -development worksheet, once LOD revised. Revisit biofilter design, if necessary. g. C5.1: In calculations packet, include /account for Ex. 15" RCP fraction of runoff that bypasses bioretention. h. C4.2: Label Ex. storm line 1, Ex. storm line 2. i. C5.2: Revise VaRRM.xls, once LOD revised. Engineering Review Comments Page 3 of 4 j. C5.2: Label bioretention facility floor dimensions in plan view. k. Copy Construction Record Drawings (As -built) for VSMP as .PDF image to the plan (link: hLtp://www.albemarle.orgLupload/images/forins center/departments/Communiiy Development/forms/E neineerin¢ and _WPO_Forms/WPO_VSMP_Construction _ Record_ Drawings Policy 23Ma, 2�pdf) 1. Include (attached) bio-retention periodic inspection guidelines on the plan. in. Include relevant information from VA DEQ Stormwater Design Specification No. 9, Sec. 9.2 and 9.3 on the plan. n. Include VA DEQ Spec. No. 9 Bioretention Installation steps, Sec. 8.2, on the plan. o. ESC i. C6.0 1. Provide construction access to stockpile /laydown area. Provide paved construction entrance with spray wash (paved wash rack detail at p. 8 /ACDSM /Link: httD://www.albemarle.orL,/uDload/imaees/forms center/departments/communit development/forms/desien standards manual/Albemarle Countv Design Sta ndards_Manual _2015-04-25_draft.pdf . 2. Resolve 20" cedar /silt fence conflict. 3. Label Area of LOD (ft2). 4. Provide /label safety fence (SAF) needed to isolate paths routinely taken by school children or residents, from areas of construction. ii. C6.1 1. LOD width for 5' sidewalk construction is shown to be approx. 4.4' w. Revise /increase LOD width. Compare with equipment used to construct; revise LOD width to a reasonable minimum. 2. Silt fence (SF) along this portion of the project is hard to evaluate; revise to ensure SF limits off -site sediment transport on this portion of project. iii. C6.2 1. Increase LOD for bioretention pipe outfall installation to 10' w, min. 2. Label proposed bioretention pipe outfall. 3. Provide profile for proposed bioretention outfall. 4. Provide SF between graded slope and newly constructed sidewalk. 5. Provide SF between graded slope and newly constructed sidewalk, match line inset. 6. Show construction entrance (CE). iv. C6.3 1. Provide CE, PCE (paved /ACDSM), SAF typical details. 2. Note: Albemarle County ESC Inspector may require a paved construction entrance, but given scope of work may accept a VESCH stone construction entrance. Both construction entrance details should be included on the plan. 11. C7.0, C7.1: Albemarle defers to VDOT review comments on the Traffic Management Plan for measures required to ensure vehicular and pedestrian safety along Avon Street Ext. for the duration of construction. 12. C7.2 /Notes: a. General Notes i. Note 5: replace `by the county engineer,' with `by the County (Owner), and VDOT. ii. Note 6: replace `approval from the county,' with `approval from the County (Owner), and VDOT.' iii. Note 6: replace `permission of the county,' with `permission of the County (Owner), and VDOT.' iv. Note 8: replace `as approved by the county,' with `as approved by the County (Owner).' v. Note 11: replace `directed by the county,' with `directed by VDOT.' b. Transportation Operation Plan i. Note 1: replace `the county when,' with `the County (Owner), and VDOT when.' Engineering Review Comments Page 4 of 4 c. Temporary Traffic Control (TTC) Plan i. Note 4: replace `by the city engineer,' with `by VDOT.' 13. C8.0: Provide: a. Concrete flume detail, b. VDOT handrail detail, c. Stair detail; also, item 4, above. Please feel free to call if any questions: 434.296-5832 -0069 Thank you SDP2005-00113 Cale Elem safe routes sidewalk LOR2 020720