HomeMy WebLinkAboutFDP201800017 Review Comments Floodplain Development Permit 2018-09-06COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
Floodplain Development Permit Application review
Project title: NIFI—Rivanna Greenway Stabilization
Project file number: FDP2018-00017 (Assoc. w/ WP0201800047)
Plan preparer: Kip Mumaw, Ecosystems Services [Kip@ecosystemservices.us]
Owner or rep.: Albemarle County / FES-Environmental Services Division
[scalos(a)albemarle.org; wharris(a)albemarle.org]
Plan received date: 31 Aug 2018
Date of comments: 12 Jul 2018 (Comments 1 - 7, below, sent to Applicant w/WPO comments)
6 Sep 2018 (Comments on Initial FDP Application submittal)
Reviewers: John Anderson
Associated with WP0201800047
A. Stormwater Pollution Prevention Plan (SWPPP) —NA with this Application
B. Pollution Prevention Plan (PPP) —NA with this Application
C. Erosion and Sediment Control Plan (ESOP) —NA with this Application
D. Floodplain Development Permit Application (FDP Application; 18-30.3.12) — Ref. Ecosystem
email, 8/31/2018 2:01 PM (Application submitted). Floodplain development requirements can be
found in County Code section 18-30.3, Flood Hazard Overlay District
1. Note: Project is authorized by -right under 18-30.3.11 (Table /Environmental Restoration), which does not
relieve applicant of procedural requirements. Albemarle requests supportive statements relative to fill
quantities, BFE, No -rise, and design elements to be reviewed per 18-30.3.14. Project is located within
mapped FEMA Zone AE. Ensure environmental restoration measures (Location A and B) are resistant and
resilient to occasional flooding. Submit statements and analysis with an FDP Application. Reference
WP0201800047. Include cover letter with Application with narrative and supportive reference to Flood
Insurance Study (FIS) /Albemarle County, and on-line FEMA resources /LOR data. (Initial; 8/31/18) Not
addressed. Asfollow-up: Engineering withdraws ref. to FIS; please respond to balance of comment.
Link to FDP Application:
http://www.albemarle.org/upload/images/forms center/departments/Community Development/forms/En ing eerin
g_and _WPO_Forms/Floodplain _Development Permit.pdf
2. Provide PE -seal `No Rise' Certification for WP0201800047 (see 18-30.3.12.A.5) affirmatively stating
there is no increase in the base flood elevation for Locations A and B, under proposed stabilization /fill
activities. Include reference to LOR data available via FEMA website (image below). Albemarle County
relies on Project Engineer to provide `No Rise' certificate (example Attached to this comment Memo).
(Initial FDP) Not addressed.
3. Estimate /calculate total fill below BFE with this project (0; total of Location A + Location B). Report
value on pg. 2 at item 4. of the FDP Application. (Initial) Addressed.
4. Compare and report proposed cross -sectional fill areas below BFE (sheets 5, 6) with approximate cross -
sectional Area for Rivanna River at a point midway between Location A and B; that is, Area between BFE
elevation, floodplain limits, and streambed for Rivanna River, at that point. Report proposed stabilization
fill cross -sectional area as a percentage of cross -sectional area of Rivanna River. (Initial) Not addressed.
5. Modeling is not requested, or required. If `No Rise' Certificate is not possible without modeling, evaluate
Engineering Review Comments
Page 2 of 2
options. A `No Rise' Certificate is required. `No Rise' Certificate may make reference to replacement of
lost material at project locations that is historically included in mapped floodplain limits, etc. (Initial) Not
addressed.
6. Note: Design of plantings, riprap, slope stabilization, tree -cutting, etc. will be evaluated against
encroachment standards at 18-30.3.14, A.-D. Please design accordingly. (Initial) Addressed, via internal
ref. to WP0201800047. A FDP Application form is single item of submission. Please address comments
1, 2, 4, 5. At a minimum, provide at least one plan sheet with graphic, text, and narrative information and
data, including VFRIS image below, in support of FDP Application. An FDP review is separate from a
WPO review. Ordinance requirements are located in separate sections of County Code.
7. This VESCP-FDP project cannot be approved until FDP Application is received, reviewed, and approved.
`No Rise' Certification is pre -requisite to VSMP (VESCP) Plan approval. (Initial) Comment restated:
WP0201800047 cannot be approved until FDP Application is approved. `No Rise' Certification is pre-
requisite to VSMP (VESCP) Plan approval.
Image /VFRIS (Note: LOR References): bq://cmap2.vims.edu/VaFloodRisk/vfris2.htm1
An FDP application with plan sheet/s, No -Rise Certificate, and cover letter should be resubmitted for approval as
soon as possible. For re -submittal, please provide 2 print copies of listed items with a completed FDP application
form. Engineering review staff are available from 2-4 PM on Thursdays, should you require a meeting to discuss
this review.
County forms can be found on the county website forms center under engineering;
hitp://www.albemarle.org/dgptforms.asp?department=cdengwTo Thank you
J. Anderson — 434.296-5832 —x3069
NIFI-Rivanna Greenway Stabiliz FDP201800017 090618 Assoc w wpo201800047