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HomeMy WebLinkAbout2678 - Other AssessmentsSurface Water Flooding - Supporting Information Pre -Planning Assessment— Lands at Derryrellan Kevin O'Hagan 12/01/2026 PLANK c9PATMEND MOi4QlaiAN_C®_,t UfVCIL PLANNI SE ON - - „�Aa'.iF�lf4�lur k,,�1 N26i7 J iON 19 AU -0 X123 The OPW flood maps indicate that the site maybe at risk of surface water flooding; however, these lands have been in my family's ownership for manyyears and have never flooded, including during periods of heavy or prolonged rainfall. The site is served by an existing and well -maintained drainage system, with field drains working effectively and surface water being carried away through a culvert beneath the adjoining public road. A PDF has been prepared containing dated photographs taken during heavy rainfall, along with related weather information, which show that there is no surface water ponding or flooding on the site. This information is provided to help illustrate the drainage and surface water conditions as they occur on the ground. Supporting Evidence Submitted 14/12/2025: Warnings A Weather i ari e Ernyvale, Monaghan Q Heavy rain affecting Ireland on Saturday 13th and through Sunday 14th December. 13°C f� 3°C 7°C O 5°C 10'C a°C 0°C r1 3°C X111 -0°C 2°C �J b.T 4°C v 5°C Heavy rain Light rain Partly Cloudy Sun / Clear sky Judy ::Light rain Cloudy Cloudy showers (0 (0 (0 (0 Sun 14th December 11:0012:00 13:00 14:00 15:00 16:00 17:00 18:00 1900 20:00 21:00 22:00 23:00 Mon 15th December 00:00 01:00 02:00 03:00 04:00 1 55% 11 70% 55% 1 70% 0 05% 1 50% / 55% 1 40% / 70% 110 90% 75% 1 40% 40% 30% 25% 15% 5% <5% 30 30 33 32 32 34 30 30 34 15 v 4 4 a o 4 4 ,2 54 55 57 56 55 53 51 50 47 43 34 26 21 17 8°C 15 14 8°C 7°C 14 6°C 13 6°C ®11C 12'C 12°C 12°C 12°C 12°C 12°C 12°C 13°C 10°C 9°C 8°C 6°C 6°C 6°C 6°C 6°C 6°C 6°C 7°C 7°C 7°C 7°C 7°C 7°C 6°C 5°C 5°C 4°C 3°C 2°C 0.7mm 1.tmm 0.7mm 0.5mm 0.7mm 0.4mm 0.4mm 0.4mm 0.7mm 1.1mm 0.ftmm 0.3mm 0.3mm 0.2mm 0.2mm 6.6mm 0.6mm 0.omrt LW 95.7% 93.9% 94.4% 96.0% 96.3% 96.1% 95.4% 94.5% 93.2% 91.9% 93.6% 96.2% 96.4% 97.4% 91.5% 96.2% 98.2% 98.5% 10.8°C 10.7°C 1L0°C 11.4°C 11.5°C 11.7°C 11.7°C 11.6°C 11.7°C 8.7°C 7.8°C 7.8°C 7.6°C 7.5°C 6.3'C 6.0°C 5.6°C 5.2°C ®. 1001.1 999.5 998.5 998.2 997.5 997.3 996.5 995.5 995.2 997.5 998.0 998.6 998.9 999.6 1000.1 1000.2 1000.4 1000.9 A A - ..c t�l .tom ,f y pr 3e,1� } �r�An �1' ' �" • ,.� , .. fi�� IYNL'7�`7rhtiR�r .•r. '�• ~ -. _,;s¢e FfF'`�j:1fi:,ry,Ts'� " cy4 •+:.tit.°l.�' 1 Ob�r1 • �' It. I�GfI� 7T 1 /yai ♦ ,� M y �! y[7 * ��A '. '.. . " ' "dam • .� « - � I ...`I: I - A\111 14/ 1212025 11:15-5 15/12/2025 10:34 .?r, t^r , -'• 7n , ✓;d _ ./- �',.J � 1 s ' 1/12I ' W i TI TT' /� - S15/12/2'025 10�3j6 11/01/2026: Sun 11th January 10:00 11:00 12:00 13:00 14:00 10% 5% 35% 55% 55% --28 26 27 26 37 50 48 48 50 52 10'C 10'C 10'C 10'C 10'C 4'C 5'C 5'C 5'C 4'C 15:00 90% 33 55 10'C 4C 16:00 8, 100% 35 59 10'C 3'C 17:00 18:00 19:00 20:00 100% 95% 45% 25% 35 33 40 4 65 74 77 70 11'C ire10'C 9'C 4'c rC 1'c rc 21:00 45% 36 68 8'C rC 22:00 55% 25 64 i.e i.e Mon 12th January 23:00 00:00 01:00 02:00 03:00 50% 25% 15% 20% 15% 32 34 28 28 25 59 56 55 52 50 rc 8'C 8'C 8'C 8'C VC 1'C 1'C 1'C 2'C 01mm 0.0mm 0.2mm 0.4mm 0.3mm 0.7mm 1.3mm 1.1mm 1.1mm 0.4mm 02mm 0.4mm 06mm 0.3mm 0.2mm 0.0mm O.Omm 0.0mrr 96.2% 97.3% 96.4% 94.3% 926% 926% 93.6% 94.3% 93.4% 88.4% 88.8% 90.4% 921% 91.7% 91.9% 93.6% 93.6% 94.7% 011 9.4C 9.6'C 9.6'C 9.6'C 9.3'C 9.2'C 9.4C 9.8'C tore 77'C ire 6.9'C 6A'C 6.8'C 6.7'C 6.5'C 6.7'C 6.6'C 995.6 994.7 993.0 991A 989.5 987.7 9852 983.0 9824 983.2 9837 984.8 986.1 986.4 987.0 987.9 988.5 988.8 O IMG 6638.mov 00� 002��3 s1. 27/01/2026: On 27 January 2026, Liam Ward attended the site to conduct an on -site inspection and personally observe the area during Storm Chandra, which was at its peak intensity at the time. The purpose of the visit was to assess any potential flooding impact or water accumulation on the proposed building floor plain. Please see the attached images, taken during the storm event, which clearly show the site remaining unaffected by flooding. Following the visit, Liam Ward confirmed via phone call that no notable flooding or surface water issues were observed during or after the inspection. Attached is photos dated 28 January 2026, post Storm Chandra. No notable flooding observed after the inspection. Warnings Weather ;J Marine Cnlyvale Sicrm Chandra will Impact Ireland on 26.271h January find out mae m our X Meteorologists Conmlentary 9'C 7'C 7'C 6'C f; MC t} ! a ) ro S.c (7�ei��f vc +ro Dc Ram IJght rain PartlyCloudy Partly Cloudy Rain Sun/Clear sky Partly Cloudy Rain / rue 27th Jauary 1000 11.00 1200 17.00 1400 1500 1600 17.00 10.00 19.00 2000 2100 2200 2700 901 95% 75% 451 45% 751 15\ 730 101% 65% 55% 69% 401 25\ O Z6 22 16 O O J9 1 O O 61 59 56 56 59 62 62 56 56 50 56 53 50 46 6`C 6'C 7'C 7'C 6'C 0'C 6'C 7C 7'C S'C S'C SY 4'C 6'C •1'C 0'C 2'C I'C 2'C 0'C -1'C 2'C .C J'C Z'C -4'C S'C 7'C Wed 28th Janumy 0000 01:00 0200 0300 6 6 25\ 151 101 10\ ll 27 206 21 45 42 79 36 6'C S`C 4'C 7'C .2'C .2•C J'C M 1 Omm 0 awe, 0 6nm 0 1— 0 4mm 0 4mm 0 4r, 006 r 0 4e.n 0 Srr.e 0 Snm 0 Nm 0 lmre 0 21- 0 2mm 0 tmn 0 0mm 0 Orin 92.9% 936% 90 2% 953% 902% 869% 813% 651% 174% 919% 901% 096\ 921♦ 914\ 69.1\ 059% 67.1\ 876% 44'C S1'C 61'C 64C 66'C 60'C 49'C 50'C SIC 35'C 97•C 31'C 30'C 47C 7.9'C 26'C IS'C ISC 9707 9700 %9 S %a a 9607 0476 9649 9462 0453 5469 9641 940' 970 6 9734 9'64 9703 9007 9611 w f.:.. i4 .,pt. i 1• ,r_ •r11 P , . % a wajr -:: : a., LI1 :y • :.;p• 47 1� J' • R w S. • rM •.r. -� M.. 4y : 'r` . } ' •' ~ter'' i ..i'�'r' * p y���i .. _ .tir T+ .. .. r ?. �+1 �•� ter. �4T _ 1�. ,mow 4.&f I ___.1 - .4 a�* H '•- • .LR ti 1.• - •- -••,. . rte !t. _ _ r t qz .:,� 28/01/2026 09.18 CS�lO 11 a `0) 1 1 I have also attached a site layout showing the boundaries, drainage, culvert, proposed house location, and locations where photographs were taken Site layout: i