HomeMy WebLinkAboutFDP201600004 Review Comments Floodplain Development Permit 2016-08-01COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
Project: Brookhill Floodplain Development Permit
Project File Number: FDP201600004
Plan preparer: Scott Collins, Collins Engineering [200 Garrett St., Suite K, Charlottesville, VA
22902, scott(a-,collins-en ing eering com]
Owner or rep.: Charles R. Haugh and E. J. Oglesby Jr. Trustees -435 Park St, Charlottesville, VA 22901
Developer: Riverbend Development Inc -455 21 St, SE, Ste. 400 Charlottesville, VA 22903
Plan received date: 23 May 2016
(Rev. 1) 28 Jun 2016
Date of comments: 29 May 2016
(Rev. 1) 1 Aug 2016
Reviewer: John Anderson -for En ing eering
cc: Megan Yaniglos
Frank Pohl
As Acting Floodplain Administrator, reviewer cannot sign MT -1 Form 3 sent as e -attachment on 5/26/2016
(12:56 PM), for the following reasons:
a. Elevation form (FEMA Form MT -1 Form 2) indicates lowest lot elevation is lower than base flood
elevation (BFE) for three lots (46-18, 46-18A, 46-19). BFE at each lot is listed as 360.0, while
lowest lot elevations are 351.6, 343.7, and 343.8, respectively. This may not pose an issue for
FEMA but poses an issue for Albemarle County since the Community Acknowledgment Form
(MT -1, Form 3) stipulates that the community official (Floodplain Administrator) must provide
signature stating that review of Conditional LOMR-F request finds: the proposed project meets all
of the community floodplain management requirements; all necessary Federal, State, and local
permits have been obtained; the applicant has or will document Endangered Species Act (ESA)
compliance to FEMA prior to issuance of the Conditional LOMR-F determination; proposed
structures are or will be reasonably safe from flooding as defined in 44CFR 65.2(c); and that "we
have available upon request by DHS -FEMA, all analyses and documentation used to make this
determination." Collins Engineering should provide data to show that the lowest floor elevation of
structures proposed to be (or that may be) built on these three lots is higher than base flood
elevation, and should address each element listed in FEMA MT -1 Form 3, Section A. (Rev. 1)
Partially Addressed. Asefollow-up, Albemarle County accepts TNT Environmental, Inc (TNT) 7 -
June 2016 * recommendation; letter states: "Due to the fact that the James spinymussels' preferred
habitat includes perennial, free-floating streams, and that it has been observed within Ivy Creek, as
well as the fact that there may be potential habitat for the green floater within the South Fork
Rivanna River, it is TNT's opinion that a species-specific survey for both mussels may be
warranted. TNT recommends a habitat study, which can be done any time of year, be conducted in
order to evaluate the portions of onsite streams to be impacted for potential habitat for each of the
aforementioned species." Given scope of proposed Brookhill Development, Albemarle County
Engineering Review Comments
Page 2 of 2
concurs with TNT recommendation. Please provide habitat study for County review (or TNT
review of study field data) as prerequisite to Community Official's signature (MT -1 Form 3).
* 2-p. letter, Sophie Swatzendruber /Avi M Sareen to Scott Collins; ref. p. 2, ¶ 2)
b. 10 of 11 (river station) cross-sections predict proposed grading will yield identical W.S. Elevation
to existing condition (difference =0.00'). Hydrologic and Hydraulic Analysis lists no change from
existing conditions yet plan sheet 4 indicates substantial change, with, in every case, proposed base
flood elevation less than 4 Feb 2005 FEMA FIRM (effective Map) Panel 51003CO280D/FIS BFE.
Revision is based upon updated topography, improvements to Polo Grounds Road, and modeling.
Sheet 4 shows an approximate three contour interval drop in proposed BFE at river station 4307,
for example. Please provide information that explains identical existing v. proposed W.S.
Elevations in Hydrologic & Hydraulic Analysis report, Appendix A, d. 18 -Dec, 2015. (Rev. 1)
Addressed.
c. Provide PE -seal `No Rise' certificate for Brookhill /Polo Grounds Rd. Improvements, CLOMR-F.
(Rev. 1) Not Addressed. 2 items: Plan requires seal /signature. County prefers Gregor Patsch,
PE, sign Brookill Special Use Permit & CLOMR Plan (6/15/16), but recognizes logistics of such
request. County will accept Scott Collins, PE, seal /sign. /date, on this 8-p. SP /CLOMR-F Plan.
Second: Request for PE -seal `No Rise' certificate is restated –please provide `No Rise' certificate.
d. Provide H&H report author's name (Waterways Consulting, Inc.); professional /technical
qualifications and credentials. (Rev. 1) Addressed.
e. Existing contours, sheet 4, are unreadable. Revise so existing contours are readable. (Rev. 1)
Addressed.
f. Albemarle County will not sign FEMA MT -1 Form 3 prior to Applicant signing this form. (Rev.
1) Addressed.
g. Examine existing culverts, Polo Grounds Rd. It may not be possible to lower culvert at Sta.
15+75, as proposed. Albemarle County cannot endorse CLOMR-F if vertical roadway design,
Polo Grounds Road, appears unrealistic, impractical, or unbuildable. (Rev. 1) Addressed.
h. Although need to avoid fill within floodway was discussed 19 -May, it was not possible to
appreciate every detail of vertical alignment during this meeting. Design avoids fill within
floodway, but please examine proposed grade against VDOT standards /depth of cover for
culverts. Compare streambed elevations against design. Check cut sections against site
,.,.,,tet,-ai— end design limits: Polo Grounds Road Sta. (f) 15+75, 40+20, and 44+50. (Rev. 1)
Addressed.
i. Polo Grounds Road is a public road. VDOT should have opportunity to review /comment on
proposed vertical roadway design prior to County signing MT -1 Form 3. (Rev. 1) Addressed.
28 -Jun Applicant response: "Polo Grounds Road will go through a review and approval process
with VDOT. This is just a CLOMR-F application and this process is independent of the review
and approval process for the roadway."
j. Provide /include HEC -RAS cross-section XS in table data with the other eleven (11) river station
cross-sections, since the base flood elevation is proposed to be revised /lowered at this location.
(Rev. 1) Addressed.
2. Note: Eff. 1 -Jun 2016, Frank Pohl, assumes County Engineer and Floodplain Administrator duties. County
Engineer is positioned to approve Application, or request additional information in support of this
Floodplain Development Permit Application. (Rev. 1) Items partially or not addressed were discussed
with Albemarle County Engineer, 1 -Aug 2016.
Please contact Frank Pohl, County Engineer, at 434.296-5832 –x7914, if you have any questions.
Thank you
File: FDP201600004 Brookhill 080116rev1
Comment Response Letter— FDP2016-0004
June 28, 2016
Engineering Response Letter
A. The FEMA application is requesting the lowest elevation on the (3) lots within the metes and
bounds of the property,which has been provided. The elevation is lower than the Base flood
elevation. However,this area will not be within a development lot when the property is
developed. This comment is pre-mature, in that the lowest elevation of the property will not be
within a future development lot on the property.
B. The water surface elevation between the existing and proposed is unchanged for the project.
However, what has changed is that the property has been flown, and updated contour
elevations have been provided. We have graphically shown the existing floodplain on the
property,and have updated this floodplain based on new and current topography(better
topography than what was used for the existing floodplain). Therefore,with this new
topography,the floodplain has been updated to match the topography of the property,
therefore,altering the floodplain on the property.
C. The application is included and is sealed.
D. The report was completed by Gregor Patsch. He is a licensed civil engineer who worked for
Albemarle County,Timmons Group,WW,and other firms for the past 10 years. He now works
for a company out in California,which specializes in this field of civil engineering.
E. The contours have been updated to be legible.
F. The FEMA application has been signed.
G. The vertical elevations of Polo Grounds road have been updated to match the existing roadway
as close as possible, while still adhering to VDOT design guidelines.
H. The roadway has been shifted over to allow for the shoulder to start at the existing roadway
edge. This practice eliminated all impacts to the floodway with the proposed improvements to
Polo Grounds road.
I. Polo Grounds road will go through a review and approval process with VDOT. This is just a
CLOMR-F application and this process is independent of the review and approval process for the
roadway.
J. This cross section XS1 is included with the other cross sections.
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:
Brookhill Floodplain Development Permit
Project File Number:
FDP201600004
Plan preparer:
Scott Collins, Collins Engineering [200 Garrett St., Suite K, Charlottesville, VA
22902, scott(a-,collins-en ing eering com]
Owner or rep.:
Charles R. Haugh and E. J. Oglesby Jr. Trustees -435 Park St, Charlottesville, VA 22901
Developer:
Riverbend Development Inc -455 21 St, SE, Ste. 400 Charlottesville, VA 22903
Plan received date:
23 May 2016
Date of comments:
29 May 2016
Reviewer:
John Anderson
cc: Megan Yaniglos
Frank Pohl
As Acting Floodplain Administrator, reviewer cannot sign MT -1 Form 3 sent as e -attachment on 5/26/2016
(12:56 PM), for the following reasons:
a. Elevation form (FEMA Form MT -1 Form 2) indicates lowest lot elevation is lower than base flood
elevation (BFE) for three lots (46-18, 46-18A, 46-19). BFE at each lot is listed as 360.0, while
lowest lot elevations are 351.6, 343.7, and 343.8, respectively. This may not pose an issue for
FEMA but poses an issue for Albemarle County since the Community Acknowledgment Form
(MT -1, Form 3) stipulates that the community official (Floodplain Administrator) must provide
signature stating that review of Conditional LOMR-F request finds: the proposed project meets all
of the community floodplain management requirements; all necessary Federal, State, and local
permits have been obtained; the applicant has or will document Endangered Species Act (ESA)
compliance to FEMA prior to issuance of the Conditional LOMR-F determination; proposed
structures are or will be reasonably safe from flooding as defined in 44CFR 65.2(c); and that "we
have available upon request by DHS -FEMA, all analyses and documentation used to make this
determination." Collins Engineering should provide data to show that the lowest floor elevation of
structures proposed to be (or that may be) built on these three lots is higher than base flood
elevation, and should address each element listed in FEMA MT -1 Form 3, Section A.
b. 10 of 11 (river station) cross-sections predict proposed grading will yield identical W. S. Elevation
to existing condition (difference =0.00'). Hydrologic and Hydraulic Analysis lists no change from
existing conditions yet plan sheet 4 indicates substantial change, with, in every case, proposed base
flood elevation less than 4 Feb 2005 FEMA FIRM (effective Map) Panel 51003CO280D/FIS BFE.
Revision is based upon updated topography, improvements to Polo Grounds Road, and modeling.
Sheet 4 shows an approximate three contour interval drop in proposed BFE at river station 4307,
for example. Please provide information that explains identical existing v. proposed W.S.
Elevations in Hydrologic & Hydraulic Analysis report, Appendix A, d. 18 -Dec, 2015.
c. Provide PE -seal `No Rise' certificate for Brookhill /Polo Grounds Rd. Improvements, CLOMR-F.
d. Provide H&H report author's name (Waterways Consulting, Inc.); professional /technical
qualifications and credentials.
Engineering Review Comments
Page 2 of 2
e. Existing contours, sheet 4, are unreadable. Revise so existing contours are readable.
f. Albemarle County will not sign FEMA MT -1 Form 3 prior to Applicant signing this form.
g. Examine existing culverts, Polo Grounds Rd. It may not be possible to lower culvert at Sta.
15+75, as proposed. Albemarle County cannot endorse CLOMR-F if vertical roadway design,
Polo Grounds Road, appears unrealistic, impractical, or unbuildable.
h. Although need to avoid fill within floodway was discussed 19 -May, it was not possible to
appreciate every detail of vertical alignment during this meeting. Design avoids fill within
floodway, but please examine proposed grade against VDOT standards /depth of cover for
culverts. Compare streambed elevations against design. Check cut sections against site
constraints, and design limits: Polo Grounds Road Sta. (f) 15+75, 40+20, and 44+50.
i. Polo Grounds Road is a public road. VDOT should have opportunity to review /comment on
proposed vertical roadway design prior to County signing MT -1 Form 3.
j. Provide /include HEC -RAS cross-section XS in table data with the other eleven (11) river station
cross-sections, since the base flood elevation is proposed to be revised /lowered at this location.
2. Note: Eff. I Jun 2016, Frank Pohl, assumes County Engineer and Floodplain Administrator duties. County
Engineer is positioned to approve Application, or request additional information in support of this
Floodplain Development Permit Application.
Please call 434.296-5832 —0069 if any questions.
Thank you
File: FDP201600004 Brookhill 052916