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Home My WebLink AboutFDP202000015 Correspondence 2020-08-20SHIMP ENGINEERING, P.C. Design Focused Engineering August 6, 2020 Frank Pohl, PE County Engineer Department of Community Development 401 McIntire Road, North Wing Charlottesville, Virginia 22902 RE: 0 East High St LOMR Narrative Dear Frank, Thanks in advance for reviewing the attached LOMR for 0 East High St. This has been filed in a floodplain development permit with NDS. No development is proposed at this time, this LOMR simply reflects updates to the F000dway width, as well as Zone AE and Zone X revisions resulting from a hydraulic study based on additional cross sections of the Rivanna River, for the half -mile section just downstream of the Route 250 "Free Bridge" portion. This study for this LOMR generally finds that the floodway in this area should be narrowed. Additionally, at cross sections 37.776 and 37.77, the Zone X and Zone AE floodplain should be slightly revised based on model results that occur when adding the new river topography in the form of 3 additional cross sections. These new cross sections were field surveyed and support the results shown in this LOMR. A summary of the revisions shown in this LOMR: 37.776 - GEOMETRY UNCHANGED FROM EFFECTIVE MODEL 37.77 - GEOMETRY REVISED, PLOTTED FROM LIDAR TOPO 37.68, 37.57, 37.43 - NEW GEOMETRY ADDED, PLOTTED FROM CROSS SECTION SURVEY 37.33 - GEOMETRY UNCHANGED FROM EFFECTIVE MODEL 36.90 - GEOMETRY UNCHANGED UNCHANGED FROM EFFECTIVE MODEL FLOODWAY/ENCROACHMENT LOCATIONS: 37.776 - FLOODWAY 436.4' WIDTH UNCHANGED FROM EFFECTIVE MODEL. 1835, 2271.39 37.77 - WIDENED FROM 442.1' TO 445', REV. FROM 1829.6, 2271.71 TO 1840, 2285 37.68, 37.57, 37.43 - NEW ENCROACHMENTS, WIDTH NARROWED FROM EFFECTIVE MAPPING 37.33 - REDUCED TO 430' WIDTH, REV. FROM 1755, 2255 TO 1770, 2200 36.90 - ENCROACHMENTS UNCHANGED FROM EFFECTIVE MODEL ZONE AE 1.0% ANNUAL CHANCE BASE FLOOD ELEVATION (BFE): 37.776 - BFE LOWERED LT FROM EFFECTIVE MODEL: 333.1 TO 331.9 37.77 - BFE LOWERED 07FROM EFFECTIVE MODEL: 332.9 TO 332.2 37.68, 37.57, 37.43 - BFE GENERALLY SAME AS EFFECTIVE MAPPING. 37.33 - BFE OF 331.7 UNCHANGED FROM EFFECTIVE MODEL 36.90 - BFE OF 329.2 UNCHANGED FROM EFFECTIVE MODEL 912 E. High 5t. Charlottesville, VA 229021434,227.5140 1 shimpengineering.com ZONE AE 1.0% ANNUAL CHANCE FLOODPLAIN TOPWIDTH: 37.776 - TOPWIDTH REDUCED 39.0' FROM EFFECTIVE: 639.3 TO 600.2 37.77 - TOPWIDTH REDUCED 457FROM EFFECTIVE: 634.1 TO 588.4 37.68, 37.57, 37.43 - TOPWIDTHS MAPPED THE SAME AS EFFECTIVE MAPPING. 37.33 - TOPWIDTH OF 676.54 UNCHANGED FROM EFFECTIVE MODEL 36.90 - TOPWIDTH OF 893.07 UNCHANGED FROM EFFECTIVE MODEL ZONE X 0.2% ANNUAL CHANCE FLOOD ELEVATION (FE): 37.776 - FE LOWERED 1.1' FROM EFFECTIVE MODEL: 341.1 TO 340.2 37.77 - FE LOWERED 0.8' FROM EFFECTIVE MODEL: 341.0 TO 340.4 37.68, 37.57, 37.43 - FE GENERALLY SAME AS EFFECTIVE MAPPING. 37.33 - FE OF 339.9 UNCHANGED FROM EFFECTIVE MODEL 36.90 - FE OF 338.2 UNCHANGED FROM EFFECTIVE MODEL ZONE X 0.2% ANNUAL CHANCE FLOOD TOPWIDTH: 37.776 - TOPWIDTH REDUCED 4.5' FROM EFFECTIVE: 750.7 TO 746.2 37.77 - TOPWIDTH REDUCED 1.5' FROM EFFECTIVE: 750.2 TO 748.7 37.68, 37.57, 37.43 - TOPWIDTHS MAPPED THE SAME AS EFFECTIVE MAPPING. 37.33 - TOPWIDTH OF 719.5 UNCHANGED FROM EFFECTIVE MODEL 36.90 - TOPWIDTH OF 936.5 UNCHANGED FROM EFFECTIVE MODEL If you have any questions or concerns about these revisions, please feel free to contact me at keane@shimp-en mg eering.com or byphone at 434-227-5140. Regards, Keane Rucker, EIT Shimp Engineering, P.C. 912 E. High St. Charlotresville, VA 22902 1434.227.5140 1 shimp-engineering.rom CONTENTS WORK MAPS EFFECTIVE MODEL REVISED MODEL EFFECTIVE FIRMS EFFECTIVE LOMR 16-03-1207P WORK MAPS <1� 300 0 SCALE: 1"= 300 600 900 OEASTHIGHLOMR ANNOTATED FIRM 08-06-2020 VERTICAL DATUM NA VD88 fj (MERAREAS HF FLOOD HAZA1D k, N Wltheut Base Hoed Elevoton IBFEl With B FE orlFeptli ...n= Ark Air, 6, AM ,4v af RrgnlnenryFloWway 0336Annual U lranco Flood Hatwdl, luuas ar 17rr an nuol chance'IPDod rifle arorip depth less than oma foot orwlth drainage areas of foss than a ne stern mile : r f d'rtions 1% Amozai iharce Frond Hsta rd irne r Area xilth Redd ud Flood Risk due to I.rxee Sm Natos. MAP PmHao; Wtzftm HamwWmrW VertcW 0mt m-, MWli'M 1 f iidi - 300 fkt i:fi*coo 75 150 300 Feet NATIONAL FLOOD INSURAN r- PROGRAM ALB EMARLE COUNTY, VIRGINIA AND I NC OR P 0 RATED A R EAS AND THE INDEPENDENT CITY OF CHAR LOTTESVILLE mia 297 l7F 575 AND 289 of 575 I'ranal 1;kmilairta: urxr r.kRLE COUN 9 rNLIE.OLNDENT Cfr'f1 NUMBER PANEL SUFFIX slbwt 02s'l U REVISED TO REFLECT LOMR EFFECTIVE: February 6, 2017 ZONE AE FLOODPLAIN FLOODWAY ZONE X FLOODPLAIN BASE FLOOD ELEVATION CROSS SECTIONS RIVANNA RIVER CL VERSION NUMBER 2 . is WY RUM BEN 51003CO2870 E€FECT➢'1E DAWE FEBRUARY4, 2005 SHWENMEERIN6 P.C. EAr6HEFRIN6-LANDPL4NNl'0-PROJECTMANAGEMENT 912 EAST HIGH ST PHONE: (43 ) 227-5140 I i ♦ 11 � - .. i ____ .. / /1;/, � ._ ' � // ,.. /^ _ � � �/_ � \\ \Y\�\ ., �r e I I 11 , / ` � ! 1 / ^`•tip♦ � . / ♦ oil i 1\I'i ,' j. C ♦ - /. yY I1 1 it it �® • • If ------------ fill I NN /or -------------- s fr �..i'�,' ,/ P ' _` \\\\��i+►�'�i ii �l i 11 N NAVA I 'IN { .,.0 I\ I / `\ I .. _ • i / ii \ i 1 I �r / I \, ! — 11U�"I III 1\ \ \ //• / \ r I \ I l/1 _�r� it 1 1 I it IN 41, `'jI 1 � i� 'I i i. ! •,��^_� "1 -�� ,.r. •I--- 1 \ �r I 1 \� .\\\ _.` N''./\ 1 Ip _J// l//�I I ....1 / I i 1 " . �/ / i�_. -^ I✓ / / 1} `�\ 1 1 \ 1. I III I I♦ \ \`� II i IN IN pI I i ij 11 i, r/i j j l I 1 v i 4 j 11/l 11 i i It __- � — r ".I11 : 11 \\��A / 1 , I / / I /r 1 l �. '..'./ �. � /A /�\360^ FLOODPLAINTIEIN — ' REVISED ZONE \\ i m \ ,34811 6,46 $aaa 3a°d5i _ _� \ 1 / / /' I \ �_ / • /ii / G 350 �� 1. �' � ti°° � � v / l IAA I /Iv j// � v.. v __ ___ ... ��/�� / �/ - I �.��. � �. �•___-_ /-- - 1 h -_-_-.AE FLOODPLAIN N V 0 _ \ / \ h l \• /' / 4 � V A 11 � h ]aa�e� � � � -- - � /eF�9� " Q .. �. l / TIE -NOWAY RS✓... M�?g� / / J.' /�Vood l way �Eff O o / �.�g3� 79 /60 �, j�' 'h � / 4$ �// / FLO DPLAIN TIE IN -, mho 1?401 / TIE IN EW ////'' �. N, - FLOODPLAIN TIE-IN O I / ono _ 483. p' / I, -- //',/ Zone AE ' - / /, ;'�� ; ; ; , /' � �;' / Effective -vI �; vvv\ :;. , .;.•.; .� ' � ;� ,,f - � FWn33�,�,�;,,,, ,5' � � 1�9�bsv3 ��1 'Jr CAI \� / / / / I / ��j� � / ', / � .,� / /. / � �/ � �. �' )SJ inn ✓ Zone X r�Zone AE :� Effective I / 1 �_� \ / �� A V , ✓ ./! ./' p Il�" // v ® / I Zone Effective- \ Effecctive-- ,- i IIIIII I ✓1� I r � .�. IUI�IL_ /„ r 1, r i Limits of f . -- h i I / ..I I �.. ��. .I /.,. l✓ -�--- �,�� 4500,(NEWS .. EloOdw ay<50.0 KeV151on HEC RF,37.51901111 p ECTON2BF EffecctIve 3247 / II w`332-64 Ir I / I I C 1 N (, N. Revi5ed� �` e I i i i \�_` --_�,-// i . . . . . . . . . . . . :� -_�. :4,481\ /� ... . . . . . . . . . . . /}.6a� : r—:✓,t ./. . . / . . . 1. . . ./. 48 ./. /,l /. .I. .J ./-_ ii�_ i�=- ==o /: .. I \ / 1 /� .-'' /. . . . . . all / / I t ♦ / . ./. . .I .('. 6\ . . . . 2 j$6G - . . . ii. / ` ,/ .� / �l / - ,'l�J. d. \. 37.43. \ \ E J . 1. '� -- - _ \ � � . �. .1 � BFE,� S CTIpm 7)13p . a lr'./_�\� 3�$a�' /33803 I//- .�/ /�� .i��' �•' �./ // / / i �/ v — A A A V A V I �� ;I { �I _ -A 'an / 334sq X_ . . . . . _ %4001 411, �//i P �' n gnu Ni 1 (� \ � I r ,NA_ / / / ///1 I � 1 1 1 �� 1. .I\ �\ \\ 3\\\II , '1 ` K,h \ / �•� / / / � \.. \ �,��. Qom''] _ I A im t5 0 wool , : v v / / I 1 � / l y , � � n _ � � / � — _ —� v Av v v V� _ •. .•� � � � I I I I � / l / / LEGEND\\10 EFFECTIVE REVISED — i / \ . FLOODWAY FLOODWAY- -- 0U wa y I ZONE AE ZONE AE — = _ _ /, AD24 — / FLOODPLAIN FLOODPLAIN / , �� — — —'s° v v v ` / T P 410 ZONE X ZONE X / FLOODPLAIN FLOODPLAIN \ \ V / / ///,// �/, / //' 4,4 v \416 _ \ BASE FLOOD BASE FLOOD ELEVATION RIVANNA RIVER CL .. 0 100 200 300 SCALE: 1`100' ELEVATION CROSS SECTIONS OEASTHIGHLOMR WORKMAP2 CROSS SECTIONS & TOPO 08-05-2020 VER77CAL DATUM. NAVD88 I� 0 2 u J M. IMP Y L . 45183 6 01, Er` SNNPENGINEERM,, P.C. ENGINEERING-LANDPLAWNO-PROJUTAL9NMBEAT 9,2 EAST H:GR ST . (434) 227-5140 CHARLOTTESViLLE. VA 22902 JtISTIN®SHIMP- NC: EERINC.COM EFFECTIVE MODEL Rivanna River Effective Plan: EFFECTIVE FLOODWAY ANALYSIS 8/7/2020 Sta. .776 i37 .1 _' _�_ .08 360 - - - Legend WS 100-Encroach WS 100-NoEncroach Ground • Bank Sta 350 Encroachment 340 - c 330 m w 320 310 300 1400 1600 1800 2000 2200 2400 2600 Station (ft) Rivanna River Effective Plan: EFFECTIVE FLOODWAY ANALYSIS 8/7/2020 Sta. 37.77 Same location as Cross Section Y in 2005 FIS .1 _�_ .04 _�_ .08 360 Legend WS 100-Encroach WS 100-NoEncroach Ground • Bank Sta 350 Encroachment 340 c 330 m w 320 310 300 1400 1600 1800 2600 2200 2400 2600 Station (ft) Rivanna River Effective Plan: EFFECTIVE FLOODWAY ANALYSIS 8/7/2020 Sta. 37.33 Same location as Cross Section X in 2005 FIS .1 '' .04 '1( .1 360 — Legend WS 100-Encroach WS 100-NoEncroach Ground • 350 - -� - - Bank Encroachmhm ent 340 330 c 0 - s u w 320 310 300 290 800 1000 1200 1400 1600 1800 2000 2200 2400 Station (tt) Rivanna River Effective Plan: EFFECTIVE FLOODWAY ANALYSIS 8/7/2020 Sta. 36.90 Same location as Cross Section W in 2005 FIS .1.04 _I' .1 360 Legend WS 100-Encroach WS 100-NoEncroach Ground 350 - • Bank Sta Encroachment 340 330 c 0 u w 320 - 310 300 290 1800 2000 2200 2400 2600 2800 3000 Station (ft) Rivanna River Effective Plan: EFFECTIVE FLOODWAY ANALYSIS 8/7/2020 Sta. 36.53 Same location as Cross Section V in 2005 FIS .1 .04 '_ .1 360 Legend . WS 100-Encroach WS 100-NoEncroach Ground 350 - • Bank Sta Encroachment 340 330 c 0 m w 320 — 310 — 300 290 1800 2000 2200 2400 2600 Station (ft) Rivanna River Effective Plan: EFFECTIVE FLOODWAY ANALYSIS 8/7/2020 IVANNA RIVER RIVANNA 380 Legend WS 100-NoEncroach WS 10o-Encroach Crit 100-Encroach 360 - - Crit 100-NoEncroach Ground 340 — 320 — x c 0 m w 300 280 260 240 0 10000 20000 30000 40000 50000 60000 70000 Main Channel Distance (ft) HEC-RAS Plan: EFFEC. FLOODWAY River: RIVANNA RIVER Reach: RIVANNA Reach River S1a Profile G Total Min Ch El W.S. Elm Crit W.S. E.G. Elev E.G. Slope Val Chat Fbw Area Froude # Chi Ids) (e) fl (e) (e) (6A1) (#/s) (salt RIVANNA 37.776 100-NoEnroach 69852.00 303.60 333.07 335.41 0.001813 12.98 755576 0.46 RIVANNA 37.776 100-Encroach 69852.00 303.60 333.59 335.94 0.001741 12.90 6911.24 0.45 IM0,00 RIVANNA 37.77 100-NOEncroach 69852.00 303.80 332.91 335.33 0.001898 13.17 7424.02 0.47 RIVANNA 97.77 100-Enrroach MUM 303.80 333.45 335.86 0.001813 13.06 6823:50 0.46 RIVANNA 37.33 100-NoE�roach 69852.00 298.80 331.65 332.53 0.000636 8.14 12442.99 0.28 100-EncrodcM1 69852.00 296.80 332.08 333.08 0.000671 8.45 1080204 0.29 36-90 100-NOEncroach 69852.00 297.30 329.25 330.52 0.001102 10.64 12815.70 893.06 0.37 RANA97.33 36.90 100-Encroach 69852.00 297.30 329.31 330.86 0.001253 11.36 1035054 590.00 0.39 36.53 100-NoEnroach 69852.00 297.80 324.27 327.20 0.002546 14.66 6854.34 472.48 0.54 36.53 100-Encroach 69852.00 297.80 324.57 327.40 M002419 14.41 6957.29 455.00 0.53 360 Rivanna River Effective Plan: EFFECTIVE MULTIPLE ANALYSIS 8/7/2020 L Sta0437.776 _L 08 Legend WS 500-YEAR WS 1 R WS 50-YEAR WS 10-YEAR 350 — Ground • Bank Sta 340 — c 330 — m w 320 310 300 1400 1600 1800 2000 2200 2400 2600 Station (ft) Rivanna River Effective Plan: EFFECTIVE MULTIPLE ANALYSIS 8/7/2020 Sta. 37.77 Same location as Cross Section Y in 2005 FIS .oa .oe 360 Legend WS 500-YEAR WS 1 R WS 50-YEAR WS 10-YEAR 350 Ground • Bank Sta 340 c 330 m w 320 310 300 1400 1600 1800 2000 2200 2400 2600 Station (H) Rivanna River Effective Plan: EFFECTIVE MULTIPLE ANALYSIS 8/7/2020 Sta. 37.33 Same location as Cross Section X in 2005 FIS .1� .1 .04 360 Legend WS 500-YEAR WS 100-YEAR WS 50-YEAR 350 - WS 10-YEAR ■ Ground • Bank Sta 340 330 c 0 w 320 310 300 290 800 1000 1200 1400 1600 1800 2000 2200 2400 Station (tt) Rivanna River Effective Plan: EFFECTIVE MULTIPLE ANALYSIS 8/7/2020 Sta. 36.90 Same location as Cross Section W in 2005 FIS .1.04 _' .1 360 Legend II WS 500-YEAR WS 100-YEAR WS 50-YEAR 350 - - WS 10-YEAR ■ Ground • Bank Sta 340 330 0 m w 320 310 300 290 1800 2000 2200 2400 2600 2800 3000 Station (it) Rivanna River Effective Plan: EFFECTIVE MULTIPLE ANALYSIS 8/7/2020 Sta. 36.53 Same location as Cross Section V in 2005 FIS .1 .04 360 Legend WS 500-YEAR WS 1 R WS 50-YEAR 350 - WS 10-YEAR Crit 10-YEAR Ground • Bank Sta 340 330 c 0 .6 m w 320 310 300 290 1800 2000 2200 2400 2600 Station (tt) Rivanna River Effective Plan: EFFECTIVE MULTIPLE ANALYSIS 8/7/2020 RIVANNA RIVER RIVANNA '� 380 � Legend WS 500-YEAR WS 106-YEAR WS 50-YEAR 360 - — WS 10-YEAR „, Crit 500-YEAR Crit 100-YEAR Crit 50-YEAR Crit 10-YEAR 340 — — Ground 320 — x c o + m w 300 280 - -- 260 240 0 10600 20600 30000 40000 50000 60000 70000 Main Channel Distance (ft) HEC-RAS Plan: EFFECT. MULTIPLE River: RIVANNA RIVER Reach: RIVANNA Reach River Sta Profile G Total Min Ch EI W.S. Elev Crft W.S. E:G. Elev E.G. Slope Vet ChN Flow Area Top Width Froude M Chi (cfa) (W (ft) (ft) (ft) (ft40 NO (sq ft) (it) RIVANNA. $7.776 10-YEAR 30052.00 303.60 324.38 325.76 0.001659 9.50 3411.30 319.76 0.41 RIVANNA 37.776 50-YEAR 55646.00 303.60 330.31 332A5 0.001860 12.16 5920.58 545:43 0.4 RNANNA 37.776 100-YEAR 6985200 303.60 333.07 335.41 0.001813 12-98 7555.76 63928 0.46 RIVANNA 37.776 500-YEAR 112802.00 303.60 341.13 343.43 0.001392 13.71 13327.74 750.67 0.42 RIVANNA 37.77 10-YEAR 30052.00 303.80 324.25 325.69 0.001764 9.69 3336.54 315.71 0.42 RNANNA 37.77 50-YEAR 55646.00 303.80 330.15 332.36 0-001962 12.37 5799-19 539.93 0.47 RIVANNA 137.77 100-YEAR 69852.001 303.80 332.911 335.33 0-001898 13.171 7424.02 634.05 1 0.47 RIVANNA. $7.77 500-YEAR 112802.00 303.80 341.04 343.37 0-001428 13.82 13221.42 750.18 0.43 RNANNA 37.33 10-YEAR 3005200 298.80 322.83 323.31 0.000556 5.76 6749-40 617.00 0.25 RIVANNA 37.33 50-YEAR 55646.00 298.80 328.85 329.60 0-000518 7.43 10577.52 656.96 0.27 RIVANNA. $7.33 100-YEAR 69852.00 298.80 331.65 33253 0,000636 8.14 12442.99 676.54 0.28 RIVANNA 37.33 500-YEAR 112802.00 298.80 339.87 341.00 0.000692 9.44 18208.64 719.49 0.29 RIVANNA 36.90 10-YEAR 30052.00 297.30 320.17 321.27 O.W1361 am 5003-45 692.46 0.38 RIVANNA. 36.90 50-YEAR 55646.00 29730 326.25 327.53 0-001222 10.32 10158.61 876.76 0.38 RIVANNA 136.90 100-YEAR 1 69852.001 297.301 329.251 1 330.52 (IM011021 10.64 12815.70 893.06 0.37 RNANNA 36.90 500-YEAR 11280200 297.30 338.18 339.37 0-000787 10.96 2097929 936.54 0.33 RIVANNA. 36.53 10-YEAR 30052.00 297.80 313.40 310.74 316.36 0-005284 13.80 2240.74 276.68 0.70 RIVANNA 36.53 50-YEAR 55646.00 297.80 320.64 323.67 0.003183 14.60 5166.49 456.97 0.59 RNANNA 36.53 100-YEAR 6985200 297.80 32427 327.20 0.002546 14.66 6854.34 472.48 0.54 RIVANNA 36.53 500-YEAR 112802.00 297.80 334.23 337.04 O.W1639 14.97 11781.85 519.23 0.46 REVISED MODEL Rivanna River Revised 8-5-20 Plan: REVISED FLOODWAY ANALYSIS 8-5-20 8/7/2020 Sta. 37.776 1 'i' .04 'i' .08 360 Legend . WS 100-Encroach WS 100-NoEncroach Ground • Bank Sta 350 Encroachment 340 c 330 m w 320 310 300 1400 1600 1800 2000 2200 2400 2600 Station (tt) Rivanna River Revised 8-5-20 Plan: REVISED FLOODWAY ANALYSIS 8-5-20 8/7/2020 Sta. 37.77 Same location as Cross Section Y in 2005 FIS .1 + .035 _L .08 _I 360 - 350 340 c 330 m w 320 310 300 1600 1800 2000 2200 2400 2600 Station (ft) Legend WS 100-Encroach WS 100-NoEncroach Ground • Bank Sta Encroachment Rivanna River Revised 8-5-20 Plan: REVISED FLOODWAY ANALYSIS 8-5-20 8/7/2020 Sta. 37.68, New Cross Section 3 .1 —.035 .05 360 Legend WS 100-Encroach WS 100-NoEncroach Ground • Bank Sta 350 Encroachment 340 c 330 m w 320 310 300 1400 1600 1800 2000 2200 2400 2600 2800 3000 Station (tt) Rivanna River Revised 8-5-20 Plan: REVISED FLOODWAY ANALYSIS 8-5-20 8/7/2020 Sta. 37.57, New Cross Section 2 .1 + ,035 .05 _ 360 - Legend WS 100-Encroach WS 100-NoEncroach Ground • 350 - Bank Sta Encroachment 340 330 c 0 m " w 320 310 — 300 290 1600 1800 2000 2200 2400 2600 2800 Station (tt) Rivanna River Revised 8-5-20 Plan: REVISED FLOODWAY ANALYSIS 8-5-20 8/7/2020 Sta. 37.43, New Cross Section 1 . O6 350 Legend WS 100-NoEncroach a WS 100-Encroach Ground • Bank Sta 340 Encroachment 330 r� 320 m w 310 300 290 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 Station (it) Rivanna River Revised 8-5-20 Plan: REVISED FLOODWAY ANALYSIS 8-5-20 8/7/2020 Sta. 37.33, Same location as Cross Section X in 2005 FIS .1 '�' .04 1 360 Legend WS 100-Encroach WS 100-NoEncroach Ground 350 - - • Bank Sta Encroachment 340 330 �i f o II w I 320 310 300 290 800 1000 1200 1400 1600 1800 2000 2200 2400 Station (ft) Rivanna River Revised 8-5-20 Plan: REVISED FLOODWAY ANALYSIS 8-5-20 8/7/2020 Sta. 36.90, Same location as Cross Section W in 2005 FIS .1.04 + .1 360 Legend WS 100-NoEncroach a WS 100-Encroach Ground • 350 Bank Sta Encroachment 340 330 c 0 m w 320 - 310 300 290 1800 2000 2200 2400 2600 2800 3000 Station (ft) Rivanna River Revised 8-5-20 Plan: REVISED FLOODWAY ANALYSIS 8-5-20 8/7/2020 Sta. 36.53, Same location as Cross Section V in 2005 FIS .1 .04 360 Legend WS 100-Encroach WS 100-NoEncroach Ground 350 • Bank Sta Encroachment 340 330 c 0 m w 320 310 - 300 290 1800 2000 2200 2400 2600 Station (tt) Rivanna River Revised 8-5-20 Plan: REVISED FLOODWAY ANALYSIS 8-5-20 8/7/2020 RE C m w Legend WS 100-NoEncroach WS 100-Encroach Crit 100-No Encroach Crit 100-Encroach Ground Main Channel Distance (ft) HEC-RAS Plan: REV. FLOODWAY River: RIVANNA RIVER Reach: RIVANNA Reach River Sta Profile O Total Min Ch E W.S. Elev, Cri1 W.S. E.G. Elev E.G. Slope Area Top Width Froude # Chi Ids) (e) (e) (e). (e) (9ftt)) lt n) RIVANNA 37.776 100-NoErlcrcach 69852.00 303.60 331.92 334.64 0.002203844.14 600.24 0.50 RIVANNA 37.776 100-Encroach 69852.00 303.60 332.90 335.43 0.001935609.77 436.39 0.47 m9.979446.94 RIVANNA 37.77 100-NoEooroach 69852.00 303.00 332.24 334.19 0.0010437970.58 588.40 0.40 RIVANNA 37.T 100-Enc oach 69852.00 303-00 333.19 335.04 0.0009427683.82 445.00 0.38 RIVANNA 37.68 100-NoEmrcach 69852.00 300.96 33Z60 333.59 0.000545544.22 960.33 0.30 RIVANNA 37.68 100-Encroach 69852.00 300.96 333.19 334.56 0.0006549446.94 483.00 0.33 RIVANNA 37.57 100-NoEooroach 69852.00 299.56 332.47 333.22 0.000456 8.61 13851.92 818.82 0.27 RIVANNA 37.57 100-Encroach 69852.00 299.56 332.64 334.13 0.000742 11.03 9405.05 450.00 0.35 RIVANNA 37.43 100-NoEncroach 69852.00 298.95 332.30 332.86 0.000384 7.67 17524.34 1212.79 0.25 RIVANNA 37.43 100-Encroach 69852.00 298.95 33227 333.55 0.000687 10.25 9785.55 475.00 0.33 RIVANNA 37.33 100-NoEooroach 69852.00 298.80 331.65 332.53 0.000636 8.14 12443.34 676.54 0.28 RIVANNA 37.33 100-Encroach 69852.00 298.80 331.99 333.09 0.000722 8.75 9811.63 430.00 0.30 RIVANNA 36.90 100-NoEmrcach 69852.00 297-W M25 330.52 0.001102 10.64 12816.43 893.07 0.37 RIVANNA 36.90 100-Encroach 69852.00 297.30 M23 330.80 0.001269 10141 10301.26 590.00 0.40 RIVANNA 36.53. 100-NoErn oach 69852.00 297.80 32427 327.20 0.002545 14.65 8855.51 472.49 0.54 RIVANNA 35.53 100-Encroach 69852.00 297.80 324.33 32724 0.002521 14.61 6846.25 455.00 0.54 Rivanna River Revised 8-5-20 Plan: REVISED MULTIPLE ANALYSIS 8-5-20 8/7/2020 Sta. 37.776 .1 .04 .08 _ 360 Legend WS 500-YEAR WS 100-YEAR WS 50-YEAR WS 10-YEAR 350 ' Ground • Bank Sta 340 c 330 m w 320 310 300 1400 1600 1800 2000 2200 2400 2600 Station (ft) Rivanna River Revised 8-5-20 Plan: REVISED MULTIPLE ANALYSIS 8-5-20 8/7/2020 Sta. 37.77 Same location as Cross Section Y in 2005 FIS .1 _' .035 `I_ .OS � 360 Legend WS 500-YEAR WS 100-YEAR WS 50-YEAR WS 10-YEAR 350 ' Ground • Bank Sta 340 c 330 — m w 320 310 300 1600 1800 2000 2200 2400 2600 Station (tt) Rivanna River Revised 8-5-20 Plan: REVISED MULTIPLE ANALYSIS 8-5-20 8/7/2020 Sta. 37.68, New Cross Section 3 �.1 .035 _' .05 _ 360 i Legend WS 500-YEAR WS 100-YEAR WS 50-YEAR WS 10-YEAR 350 Ground • Bank Sta 340 0 330 m w 320 310 - - 300 1400 1600 1800 2000 2200 2400 2600 2800 3000 Station (it) Rivanna River Revised 8-5-20 Plan: REVISED MULTIPLE ANALYSIS 8-5-20 8/7/2020 Sta. 37.57, New Cross Section 2 .1 ��.035 'i' .05 _ 360 Legend WS 500-YEAR WS 10WS Y0�- EAREAR WS 50-YEAR 350 WS 10-YEAR Ground • Bank Sta 340 330 c 0 m w 320 310 — 300 290 1600 1800 2000 2200 2400 2600 2800 Station (ft) Rivanna River Revised 8-5-20 Plan: REVISED MULTIPLE ANALYSIS 8-5-20 8/7/2020 Sta. 37.43, New Cross Section 1 �.1 ---+—.035 .06 _ 350 Legend WS 500-YEAR WS 100-YEAR WS 50-YEAR WS 10-YEAR 340 — Ground • Bank Sta 330i c 320 m w 310 300 — 290 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 Station (it) Rivanna River Revised 8-5-20 Plan: REVISED MULTIPLE ANALYSIS 8-5-20 8/7/2020 Sta. 37.33, Same location as Cross Section X in 2005 FIS .1 .04. .1 360 - Legend WS 500-YEAR W100-YEAR S WS 50-YEAR 350 - - WS 10-YEAR Ground • Bank Sta 340 330 — c 0 m w 320 310 300 290 800 1000 1200 1400 1600 1800 2000 2200 2400 Station (it) Rivanna River Revised 8-5-20 Plan: REVISED MULTIPLE ANALYSIS 8-5-20 8/7/2020 Sta. 36.90, Same location as Cross Section W in 2005 FIS .1��.04 .1 6 30 — Legend WS 500-YEAR WS 100-YEAR WS 50-YEAR 350 WS 10-YEAR Ground • Bank Sta 340 — 330 c 0 m w 320 310 300 290 1800 2000 2200 2400 2600 2800 3000 Station (ft) Rivanna River Revised 8-5-20 Plan: REVISED MULTIPLE ANALYSIS 8-5-20 8/7/2020 Sta. 36.53, Same location as Cross Section V in 2005 FIS 04 '' .1 360 Legend WS 50( YEAR WS 106-YEAR WS 50-YEAR 350 WS 10-YEAR Cn.t 10-YEAR Ground • Bank Sta 340 330 c 0 m w 320 310 300 290 1800 2000 2200 2400 2600 Station (tt) Rivanna River Effective Plan: EFFECTIVE MULTIPLE ANALYSIS 8/7/2020 RIVANNA RIVER RIVANNA '� 380 � - — Legend WS 500-YEAR WS 100-YEAR WS 50-YEAR 360 - — WS 10-YEAR Crit 500-YEAR Crit 100-YEAR ........ Crit 50-YEAR Crit 10-YEAR 340 — — — Ground 320 — c o + m w 300 280 — 260 240 0 10000 20000 30000 40000 50000 60000 70000 Main Channel Distance (ft) HEC-RAS Plan: REV. MULTIPLE River: RIVANNA RIVER Reach: RIVANNA Reach River Sta Profile 0 Total Min Ch El W.S. Bev Crd W.5- E:G. Elev E.G- Slope Vet Chnl Flow Area Top Width Froude # Chi (cis) (W. (it) (0) (8) (fVlt) NO (sq 8) (it) RIVANNA. $7.776 10-YEAR 30052.00 303.60 323.47 325.05 0.002003 10.10 3134.50 291.71 0.45 RIVANNA 37.776 50-YEAR 55646.00 303.60 329.18 331.67 0.002281 13.00 5333.06 495.28 0.50 RNANNA 37.776 100-YEAR 6985200 303-60 331.92 334.64 0.002203 13.87 6844.14 60024 0.50 RIVANNA 37.776 500-YEAR 112802.00 303.60 340.23 342.77 0-IM1575 14.31 12651.14 746.15 0.45 RIVANNA 37.77 10-YEAR 30052.00 303.00 323.73 324.69 0.000773 7.89 3945.32 290.30 0.32 RNANNA 37.77 50-YEAR 55646.00 303-00 329.52 331.21 0-001013 10.65 6449-91 53355 0.38 RIVANNA 137.77 100-YEAR 69852.001 303.00 332.241 334.19 0-001043 11 B21 7970-58 588.40., 0.40 RIVANNA. $7.77 500-YEAR 112802.00 303.00 340.36 342.55 0-000905 12.93 1366532 748.66 0.39 RNANNA 37.68 10-YEAR 3005200 300-96 323.64 324.34 0.000537 6.91 5451.22 557.05 0.28 RIVANNA 37.68 50-YEAR 55646.00 300-96 329.71 330.67 0-W0574 8.57 9890.33 864.61 0.30 RIVANNA. $7.68 100-YEAR 69852.00 300-96 332.60 333.59 0.000545 8.97 12544.22 960.33 0.30 RIVANNA 37.68 500-YEAR 112802.00 300-96 341.02 341.90 0.000402 9.16 21618.86 1179.77 0.27 RIVANNA 37.57 10-YEAR 30052.00 299-56 323.37 324.01 0-000500 7.14 6725.64 74623 0.27 RIVANNA. 37.57 50-YEAR 55646.00 299.56 329.57 330.28 0-000472 820 11511.53 796.11 0.27 RIVANNA 137.57 100-YEAR 69852.001 299.56 332.47 333.22 0.000456 8.67 13851.92 818.82 0.27 RNANNA 37.57 500-YEAR 11280200 299-56 340.86 341.64 0-000379 922 21005.09 885.09 0.26 RIVANNA. $7.43 10-YEAR 30052.00 29&95 323.06 323.64 0:000490 6.78 7212,36 952.05 0.26 RIVANNA 37.43 50-YEAR 55646.00 298.95 329.34 329.92 0.000422 7.50 14023.77 1156.75 0.25 RNANNA 37.43 100-YEAR 6985200 298-95 332.30 332.86 0-000384 7.67 17524.34 1212.79 0.25 RIVANNA 37.43 500-YEAR 112802.00 298-95 340.82 341.32 0-000285 7.80 2995051 1610-11 0.22 RIVANNA 37.33 10-YEAR 30052-00 298.80 322.83 323.31 0.000556 5.76 6749.40 617.00 0.25 RNANNA 37.33 50-YEAR 55646.00 298-80 328.85 329.60 0-000618 7.43 10577.46 656.95 0.27 RIVANNA 137.33 100-YEAR 69852.001 298.80 331.65 332.53 0-000636 8.141 12443.34 676.541 0.28 RIVANNA. $7.33 500-YEAR 112802.00 298-80 339.87 341.00 0-000593 9.44 18207.89 719.49 0.29 RNANNA 36.90 10-YEAR 3005200 297.30 320.17 321.27 0-001361 8.86 5003.45 692.46 0.38 RIVANNA 36.90 50-YEAR 55546.00 29730 326.25 327.52 0-001222 10-32 10158.42 876.76 0.38 RIVANNA. 36.90 100-YEAR 69852.00 297.30 32925 330.52 0-001102 10.64 12816.43 893.07 0.37 RIVANNA 36.90 500-YEAR 112802.00 297.30 338.18 339.37 0.000788 10.96 20978.06 936.54 0.33 RIVANNA 36.53 10-YEAR 30052.00 297.80 313.40 310.76 316.36 0-005286 13.80 2240-40. 276.59. 0.70 RIVANNA. 36.53 50-YEAR 55646.00 297.80 320.64 323.67 0-003184 14.60 5165.92 456.97 0.59 RIVANNA 36.53 100-YEAR 69852.00 297.80 324.27 327.20 0.002545 14.65 6855.51 672:49 0.54 RNANNA 36.53 500-NEAR 112802.00 297.80 33423 337.04 0.001640 14.97 11780.78 51922 0.46 EFFECTIVE FIRMS NOTES TO USERS This map is for use in administering the National Flood Insurance Program. It does not necessarily identify all areas subject to flooding, particularly from local drainage sources of small size. The community map repository should be consulted for possible updated or additional flood hazard information. To obtain more detailed information in areas where Base Flood Elevations (BFEs) and/or floodways have been determined, users are encouraged to consult the Flood Profiles, Floodway Data and/or Summary of Stillwater Elevations tables contained within the Flood Insurance Study (FIS) report that accompanies this FIRM. Users should be aware that BFEs shown on the FIRM represent rounded whole -foot elevations. These BFEs are intended for flood insurance rating purposes only and should not be used as the sole source of flood elevation information. Accordingly, flood elevation data presented in the FIS report should be utilized in conjunction with the FIRM for purposes of construction and/or floodplain management. Coastal Base Flood Elevations shown on this map apply only landward of 0.0' North American Vertical Datum of 1988 (NAVD 88). Users of this FIRM should be aware that coastal flood elevations are also provided in the Summary of Stillwater Elevations tables in the Flood Insurance Study report for this jurisdiction. Elevations shown in the Summary of Stillwater Elevations tables should be used for construction and/or floodpiain management purposes when they are higherthan the elevations shown on this FIRM. Boundaries of the floodways were computed at crass sections and interpolated between cross sections. The floodways were based on hydraulic considerations with regard to requirements of the National Flood Insurance Program. Floodway widths and other pertinent floodway data are provided in the Flood Insurance Study reportfor this jurisdiction. Certain areas not in Special Flood Hazard Areas may be protected by flood control structures. Refer to Section 2.4 "Flood Protection Measures" of the Flood Insurance Study report for information on flood control structures in this jurisdiction. The projection used in the preparation of this map was Universal Transverse Mercator (UTM) Zone 17. The horizontal datum was NAD 83, GRS80 spheroid. Differences in datum, spheroid, projection or UTM zones used in the production of FIRMS for adjacent jurisdictions may result in slight positional differences in map features across jurisdiction boundaries. These differences do not affect the accuracy of this FIRM. Flood elevations on this map are referenced to the North American Vertical Datum of 1988. These flood elevations must be compared to structure and ground elevations referenced to the same vertical datum. For information regarding conversion between the National Geodetic Vertical Datum of 1929 and the North American Vertical Datum of 1988, visit the National Geodetic Survey website at http://www.ngs.noaa.gov or contact the National Geodetic Survey at the following address: Spatial Reference System Division National Geodetic Survey, NOAA Silver Spring Metro Center 1315 East-West Highway Silver Spring, Maryland 20910 (301) 713-3191 To obtain current elevation, description, and/or location information for bench marks shown on this map, please contact the Information Services Branch of the National Geodetic Survey at (301) 713-3242, or visit their website at http://www.ngs.noaa.gov. Base map information shown on this FIRM was provided in digital format by Albemarle County Department of Planning & Community Development. This information was photogrammetrically compiled at a scale of 1:4,800 from aerial photography dated March 2000. This map reflects more detailed and up-to-date stream channel configurations than those shown on the previous FIRM for this jurisdiction. The floodplains and floodways that were transferred from the previous FIRM may have been adjusted to conform to these new stream channel configurations. As a result, the Flood Profiles and Floodway Data tables in the Flood Insurance Study Report(which contain authoritative hydaulic data) may reflect stream channel distances that differ from what is shown on this map. Corporate limits shown on this map are based on the best data available atthe time of publication. Because changes due to annexations or de -annexations may have occurred after this map was published, map users should contact appropriate community officials to verify current corporate limit locations. Please refer to the separately printed Hap Index for an overview map of the county showing the layout of map panels; community map repository addresses: and a Listing of Communities table containing National Flood Insurance Program dates for each community as well as a listing of the panels on which each community is located. Contact the FEMA Map Service Center at 1-800-358-9616 for information on available products associated with this FIRM. Available products may include previously issued Letters of Map Change, a Flood Insurance Study report, and/or digital versions of this map. The FEMA Map Service Center may also be reached by Fax at 1-800-358 9620 and their website at http://www.msc.fema.gov. If you have questions about this map or questions concerning the National Flood Insurance Program in general, please call 1.877•FEMA MAP (1-877-336-2627) or visit the FEMA website at http://www.fema.gov. 78628' 07.5" 38-03145" (-7T 3910000 FT ZONE A_ MEADOV CREEK City of Charlottesville — (Independent City) 510033 DRIVE ZONE AE M1'fEADOW CREEK 351� 3905000 FT- WILDWOOD. Cr 0 w a Z Z O 3900000 LIMIT OF NLED STUDY ZONE X CREEK DR / ZONE x 373 1,Albemarle County Unincorporated Areas 72 510006 I 4 371 O PEN ZONE AE / \ \\VICTORIAN 37Qt CT N, WHITCOVER / CIR J SALISBURY\ �^� DR SQ PRESCELLY /11/ )NE PL X ��o ZONE X s31 on o gea HWO497 n ZONE l� 38° 01' 52.5" 78028' 07.5 " \Q 1149500 FT JOINS PANEL 0279 sc 01 PENDELTON CT It ZONE G LE PARC QpV PPPJN VJIMBLEI J\AY CROSSING City of Charlottesville (Independent City) 510033 ZONE X ZC ZONE AE ZONE X \ 9 ro L/ 1 fN ZONE:, qtg ZONE A o X • 'b LOCUST LOCUST c CT ZONE o o X P LOCUST 10 1 C LANE J� 92 c�P ^MEADOW e P ZONE .�a// CREEK D ZONE X OTTER Mo �- 5 �e�y PLACE „�h V RIVERDALE DRIVE VE 3 \ WILLOW C DRIVE =J� Gj�OF e } �00��?J� ZONEAE / 5�P r N\G�A ZONE X CAROLINE AVENUE ZONE X ZONE /X Q� RICHMOND � ZONE /X CT IBLEDON WAY ZONE X 0 ZONE X AS / i ji f / / ZONE AE l ZONE X ZONE X a4 // / � d z "4k ?/ ZONE X ZONE, r AE s<c E X DRIVE lim Ps g ZONE X �n m w SPOTNAP R ROAD G` \ SOUTH AMOPS DR RIVERBEND / DR JOINS PANEL 0289 1150000 FT HORDOD ILL LN A 9 ZONE X xock N X ; 1 J.'ILLO'N y �} ZONE AE 4� ZONE X 41 9so� ZONE X 7 ZONE AE 250 FONTANA ELP DR RD �v o� ON 1E LN �F9 WILTON o9 ARM RD PASTURE LN HANSEN RD I:f 78.26'15" 0�;I • 38°03' 45" DR Albemarle County Unincorporated Areas 510006 DR :APRI, WAY ZONE X w Z o_ -4214000M MONTALCINO WAY LN ZONE X 38001' 52.5" 78°26' 15" LEGEND SPECIAL FLOOD HAZARD AREAS (SFHAs) SUBJECT TO "'"`^' INUNDATION BY THE 1 % ANNUAL CHANCE FLOOD The 1 % annual chance flood (100-year flood), also known as the base flood, is the flood that has a 1 % chance of being equaled or exceeded in any given year. The Special Flood Hazard Area is the area subject to flooding by the 1% annual chance flood. Areas of Special Flood Hazard include Zones A, AE, AH, AO, AR, A99, V, and VE. The Base Flood Elevation is the water -surface elevation of the 1% annual chance flood. ZONE A No Base Flood Elevations determined. ZONE AE Base Flood Elevations determined. ZONE AH Flood depths of 1 to 3 feet (usually areas of ponding); Base Flood Elevations determined. ZONE AO Flood depths of 1 to 3 feet (usually sheet flow on sloping terrain); average depths determined. For areas of alluvial fan flooding, velocities also determined. ZONE AR Special Flood Hazard Area formerly protected from the 1 % annual chance flood by a flood control system that was subsequently decertified. Zone AR indicates that the former flood control system Is being restored to provide protection from the 1 % annual chance or greater flood. ZONE A99 Area to be protected from 1 % annual chance flood by a Federal flood protection system under construction; no Base Flood Elevations determined. ZONE V Coastal flood zone with velocity hazard (wave action); no Base Flood Elevations determined. ZONE VE Coastal flood zone with velocity hazard (wave action); Base Flood Elevations determined. FLOODWAY AREAS IN ZONE AE The floodway is the channel of a stream plus any ad1acent floodplain areas that must be kept free of encroachment so that the 1% annual chance flood can be carried without substantial increasesin flood heights. OTHER FLOOD AREAS ZONE X Areas of 0.2% annual chance flood; areas of 1 % annual chance flood with average depths of less than 1 foot or with drainage areas less than 1 square mile; and areas protected by levees from 1 % annual chance flood. OTHER AREAS ZONE X Areas determined to be outside the 0.2% annual chance floodplain. ZONE D Areas in which flood hazards are undetermined, but possible. ® COASTAL BARRIER RESOURCES SYSTEM (CBRS) AREAS OTHERWISE PROTECTED AREAS (OPAs) CBRS areas and OPAs are normally located within or adjacent to Special Flood Hazard Areas. Floodplaln boundary -- Floodway boundary Zone D boundary •••.......... •... so* CBRS and OPA boundary Boundary dividing Special Flood Hazard Area Zones and boundary dividing Special Flood Hazard Areas of different Base Flood Elevations, flood depths or flood velocities. 513 Base Flood Elevation line and value; elevation in feel' (EL 987) Base Flood Elevation value where uniform within zone; elevation in feet' 'Referenced to the North American Vertical Datum of 1988 A A Cross section line Trari line 97°O7'30, 32°22'30" Geographic coordinates referenced to the North American Datum of 1983 (NAD 83), Western Hemisphere 4276000 m 1000-meter Universal Transverse Mercator grid values, zone 17 600000 FT 5000400t grid ticks: Virginia State Plane coordinate system, south zone (FIPSZONE 4502), Lambert Conformal Conic projection DX5510 X Bench mark (see explanation in Notes to Users section of this FIRM panel) 0M1.5 River Mile MAP REPOSITORY Referto listing of Map Repositories on Map Index EFFECTIVE DATE OF COUNTYWIDE FLOOD INSURANCE RATE MAP February 4, 2005 EFFECTIVE DATES) OF REVISION(S)TO THIS PANEL For community map revision history prior to countywide mapping, refer to the Community Map History table located in the Flood Insurance Study report for this jurisdiction. To determine if flood insurance is available in this community, contact your insurance agent or call the National Flood Insurance Program at 1-800-638-6620. 4 MAP SCALE 1" = 500' 250 0 500 1000 FEET METERS 150 0 150 Soo PANEL 0287D FIRM ° FLOOD INSURANCE RATE MAP ® ALBEMARLE COUNTY, VIRGINIA ° AND INCORPORATED AREAS m AND THE INDEPENDENT CITY OF CHARLOTTESVILLE PANEL 287 OF 575 (SEE MAP INDEX FOR FIRM PANEL LAYOUT) CONTAINS: 0 ca COMMUNITY NUMBER PANEL SUFFIX ALREMARLE COUNTY 510006 0287 D CHARLOTTESVILLE, CITY OF 610033 0287 D (INDEPENDENT CITY) Notice to User: The Map Number shown below should be used when placing map orders: the Community Number shown should be used on Insurance appllcati.m for the subject IFabove communiQ^E m ARTA MAP NUMBER 51003CO281D 0 ® o EFFECTIVE DATE FEBRUARY 4, 2005 Federal Emergency Management Agency NOTES TO USERS LEGEND This map is for use in administering the National Flood Insurance Program. It does not necessarily identify all areas subject to flooding, particularly from local drainage sources of small size. The community map repository should be consulted for possible updated or additional flood hazard information. To obtain more detailed information in areas where Base Flood Elevations (BFEs)and/or floodways have been determined, users are encouraged to consult the Flood Profiles, Floodway Data and/or Summary of Stillwater Elevations tables contained within the Flood Insurance Study (FIS) report that accompanies this FIRM. Users should be aware that BFEs shown on the FIRM represent rounded w foo elevations. These BFEs are intended for flood insurance whole -foot e- t t rating purposes only and should not be used as the sole source of flood elevation information. Accordingly, I flood elevation data resented in the FIS g y, p report should be utilized in conjunction with the FIRM for purposes of construction and/or floodplain management. Coastal Base Flood Elevations shown on this map apply only landward of 0.0' North American Vertical Datum of 1988 (NAVD 88). Users of this FIRM should be aware that coastal flood elevations are also provided in the Summary of Stillwater Elevations tables in the Flood Insurance Study report for this jurisdiction. Elevations shown in the Summary of Stillwater Elevations tables should be used for construction and/or floodplain management purposes when they are higher than the elevations shown on this FIRM. Boundaries of the floodways were computed at cross sections and interpolated between cross sections. The floodways were based on hydraulic considerations with regard to requirements of the National Flood Insurance Program. Floodway widths and other pertinent floodway data are provided in the Flood Insurance Study report for this jurisdiction. Certain areas not in Special Flood Hazard Areas may be protected by flood control structures. Refer to Section 2.4 "Flood Protection Measures' of the Flood Insurance Study report for information on flood control structures in this jurisdiction. The projection used in the preparation of this map was Universal Transverse Mercator (UTM) Zone 17. The horizontal datum was NAD 83, GRS80 spheroid. Differences in datum, spheroid, projection or UTM zones used in the production of FIRMS for adjacent jurisdictions may result In slight positional differences in map features across jurisdiction boundaries. These differences do not affect the accuracy of this FIRM. Flood elevations on this map are referenced to the North American Vertical Datum of 1988. These flood elevations must be compared to structure and ground elevations referenced to the same vertical datum. For information regarding conversion between the National Geodetic Vertical Datum of 1929 and the North American Vertical Datum of 1988, visit the National Geodetic Survey website at http://www.ngs.noaa.gov or contact the National Geodetic Survey at the following address: Spatial Reference System Division National Geodetic Survey, NOAA Silver Spring Metro Center 1315 East-West Highway Silver Spring, Maryland 20910 (301) 713-3191 To obtain current elevation, description, and/or location information for bench marks shown on this map, please contact the Information Services Branch of the National Geodetic Survey at (301) 713-3242, or visit their website at http://www.ngs.noaa.gov. Base map information shown on this FIRM was provided in digital format by Albemarle County Department of Planning & Community Development. This r m 1 mil at a scale of 1:4 800 from aerial information was photpg am etrical y compiled ed , photography dated March 2000. This map reflects more detailed and up-to-date stream channel configurations than those shown on the previous FIRM for this jurisdiction. The floodplains and floodways that were transferred from the previous FIRM may have been adjusted to conform to these new stream channel configurations. As a result, the Flood Profiles and Floodway Data tables in the Flood Insurance Study Report (which contain authoritative hydaulic data) may reflect stream channel distances that differ from what is shown on this map. Corporate limits shown on this map are based on the best data available at the time of publication. Because changes due to annexations or do -annexations may have occurred after this map was published, map users should contact appropriate community officials to verify current corporate limit locations. Please refer to the separately printed Map index for an overview map of the county showing the layout of map panels; community map repository addresses; and a Listing of Communities table containing National Flood Insurance Program dates for each community as well as a listing of the panels on which each community is located. Contact the FEMA Map Service Center at 1-800-�358-9616 for information on available products associated with this FIRM. Available products may include previously issued Letters of Map Change, a Flood Insurance Study report, and/or digital versions of this map. The FEMA Map Service Center may also be reached by Fax at 1-800-358-9620 and their website at http://www.msc.fema.gov. If you have questions about this map or questions concerning the National Flood Insurance Program in general, please call 1.877-FEMA MAP (1-877-336-2627) or visit the FEMA website at http://www.fema.gov. ZONE X 78028' 07.5" 38* 01' 52. 5 " sTEwART 'A, MFHig,FTHFN STREET ZONE s AE f P, <i ZONE X Iq. _ 1 tir C i , MEADE -A, AVENUE - ✓FFFFRSON STREET ZONE J 4= Z; SjyORT Q 0 a: CyFsgp� 16TH STREET c oy 41.E ((\UF 3895000 C' 3 City of Charlottesville (Independent City) 510033 3890000 AE 38'00'00" t-- TOO 28'OT.5" City of Charlottesville (Independent City) 510033 B"OADWAY RIVANNA 1150000 FT 78026' 15" /RIVER 1 38" 01' 52. 5 " 1149500 FT JOINS PANEL 0287 POTNAP DORCHESTER giCN ZONE Ect° °t ZONE X ROAD PL N ° age yoNo RTCyM X RtNEPO /� �sE ego g° °No �3 PANTOPS m 7C) BEVER v MOUNTAIN RD OLT � DR 2 a n G TN O e P Qo U f 2 - DORCHESTER SPL X ZONE X y O MOUNTAIN PL s. `-/ '. ,� //'' Q EVERLEY 9Q DR 4212000 M .T. r l BEVERLEY /7ONE/ �. / WAY ZONE X //./ KNIGHTSBRIDGECT N� �W,E R�FRSipF a j + / ",PQ PANTOPS 1'FryNF V D 9p MTN RD ((, oQ� X ZONE X y i m w TENNIS COURT OVERLOOK P-Tix SREEPHILL 1 STREET i J MASON CREEK ZONE X �j� �/ ��/,� ZONE X CREEK STREET LN U DAM MASON STREET `c' f or SEWAGE G �' ROADti�� / % / /� RIVANNA V RIVER SF N MOORES co n4NG PONDS CREEK LN ZONE X f ZONE /��MOOREg �i 9 P ( ZONE X ° ZONE X 1 ZONE X oe s 0 4W i \ OOR Ty0M4s �pONS WN ° OP�.(Ep9 vF� u ZONE X JOINS PANEL 0450 724000 M Albemarle County Unincorporated Areas 510006 NE X H ZONE X ZONE X X E X L 4211coo M 0000 M 42090M M 38*00'00" 78*26' 15" SPECIAL FLOOD HAZARD AREAS (SFHAs) SUBJECT TO INUNDATION BY THE 1 % ANNUAL CHANCE FLOOD The 1 % annual chance flood (100-year flood), also known as the base flood, is the flood that has a 1 % chance of being equaled or exceeded in any given year. The Special Flood Hazard Area is the area subject to flooding by the 1% annual chance flood. Areas of Special Flood Hazard include Zones A, AE, AH, AO, AR, A99, V, and VE. The Base Flood Elevation is the water -surface elevation of the 1% annual chance flood. ZONE A No Base Flood Elevations determined. ZONE AE Base Flood Elevations determined. ZONE AN Flood depths of 1 to 3 feet (usually areas of ponding); Base Flood Elevations determined. ZONE AO Flood depths of 1 to 3 feet (usually sheet Flow on sloping terrain); average depths determined. For areasof alluvial fan flooding, velocities also determined. ZONE AR Special Flood Hazard Area formerly protected from the 1% annual chance flood by a flood control system that was subsequently decertified. Zone AR indicates that the former flood control system is being restored to provide protection from the 1 % annual chance or greater flood. ZONE A99 Area to be protected from 1 % annual chance Flood 6y a Federal flood protection system under construction; no Base Flood Elevations determined. ZONE V Coastal flood zone with velocity hazard (wave action); no Base Flood Elevations determined. ZONE VE Coastal Flood zone with velocity hazard (wave action); Base Flood Elevations determined. KFLOODWAY AREAS IN ZONE AE The floodway is the channel of a stream plus any adjacent floodplain areas that must be keptfree of encroachment so that the 1% annual chance flood ran be carried without substantial increases in flood heights. OTHER FLOOD AREAS ZONE X Areas of 0.2% annual chance flood; areas of 1% annual chance flood with average depths of less than 1 foot or with drainage areas less than 1 square mile; and areas protected by levees from 1 % annual chance flood. OTHER AREAS ZONE x Areasdetermined to be outside the 0.2% annual chance floodplain. ZONE D Areas in which flood hazards are undetermined, but possible. ® COASTAL BARRIER RESOURCES SYSTEM (CBRS) AREAS OTHERWISE PROTECTED AREAS (OPAs) CBRS areas and OPAs are normally located within or adjacent to Special Flood Hazard Areas. Floodplain boundary -- Floodway boundary - - Zone D boundary .................... CBRS and OPA boundary Off— Boundary dividing Special Flood Hazard Area Zones and boundary dividing Special Flood Hazard Areas of different Base Flood Elevations, flood depths or flood velocities. 573 Base Flood Elevation line and value; elevation in feet* (EL 987) Base Flood Elevation value where uniform within zone; elevation in feet* "Referenced to the North American Vertical Datum of 1988 p A Cross section line 23 - - - - - 23 Transect line 9740713011, 32*22'30" Geographic coordinates referenced to the North American Datum of 1983 (NAD 83), Western Hemisphere 4276OW m 1000-meter Universal Transverse Mercator grid values, zone 17 600000 FT 5000-foot grid tides: Virginia State Plane coordinate system, south zone (FIPSZONE 4502), Lambert Conformal Conic projection DX5510 X Bench mark (see explanation in Notes to Users section of this FIRM panel) e M1.5 River Mile MAP REPOSITORY Refer to listing of Map Repositories on Map Index EFFECTIVE DATE OF COUNTYWIDE FLOOD INSURANCE RATE MAP February 4, 2005 EFFECTIVE DATE(S)OF REVISION(S)TO THIS PANEL For community map revision history prior to countywide mapping, refer to the Community Map History table located in the Flood Insurance Study report for this jurisdiction. To determine if flood insurance is available in this community, contact your insurance agent or call the National Flood Insurance Program at 1-800-638-6620. 4 MAP SCALE 1" = 500' 250 0 Soo 1000 FEET METERS ,so 0 150 300 m PANEL 0289D FIRM 13 FLOOD INSURANCE RATE MAP CD ALBEMARLE COUNTY, VIRGINIA n In AND INCORPORATED AREAS m AND THE INDEPENDENT CITY OF CHARLOTTESVILLE PANEL 289 OF 575 (SEE MAP INDEX FOR FIRM PANEL LAYOUT) m CONTAINS: O COMMUNITY NUMBER PANEL SUFFIX j ALBEMARLE COUNTY 510006 0289 D CHARLOTTESVILLE. CITY OF 510033 0289 D (INDEPENDENT CITY) Notice to User: The Map Number shown below should be used when placing map orders; the Community Number shown above should be used on insurance applications for the subject community. m w4naT,yF MAP NUMBER oy 51003CO2890 ® EFFECTIVE DATE NO 9� FEBRUARY 4, 2005 Federal Emergency Management Agency EFFECTIVE LOM R 16-03-1207P