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HomeMy WebLinkAboutCommunication No. 2021-12- George Yasuda Testimony Communication No. 2021-12 Flooding & Erosion Mitigation Photos provided by George Yasuda r' 'i 1) Kona1 : Video showing Muddy Flood Waters going through structure in Keopu Mill Road. Regular Stream Water should be clear after 10 minutes, but it wasn't, indicating disturbed soil up stream somewhere. Sediment Basins would help decrease the Mud getting to the Ocean as well as slow down/decrease the volume of water by serving as "Shock Absorbers" r . I • a� 2) Kona2: Video showing Muddy Flood Wates coming out from State Lands onto upper part of Kona Uplands: Large Sediment Basins situated here would help a lot, with deep Dry Wells suc as those in Photos Kona33, 34 and Kona36. w r MERNETAT 3) Kona3: Video showing Muddy Water going at moderate velocity, enough to take animals and humans with it. 4jr Aly G• x. 6) Kona6- Flood Waters abated by adding Proper Erosion Controls that was once a Flood Causing area due to water runoff misrouting/bulldozing or clearing land and blocking natural pathways without proper erosion controls. Photo shows heavily grassed areas that were bare ground but using grass seeds that germinate in 3 days, and also installing Sediment Basins and Canadian Drywells. y � � ", ,,,� �-� : €e a �-:'� •'�" - �.."_mit J � v ,. 7) Kona7- Photos show reason flooding occurred, grubbed vegetative debris, soil and rocks were pushed into Waterways where the original water's path was, thus causing water to divert and seek new pathways, eroding lots of Topsoil, creating flooding and damages such as shown in examples of Photos Kona11 and Kona12 .. rt .: F J 1J lfi_y Ah 8) Kona8: Rerouting of Water, intentionally and/or unintentionally can cause millions of dollars of damage. This photo is of vegetative debris grubbed without a permit and blocked or filled existing or original waterways and exposed many acres of land, resulting in flooding and mud in a multitude of tons reaching the ocean. Photo Kona12 is one of the resulting damages and huge amounts of mud entering the Ocean and killing Trillions of Coral Polyps. This flood happened in 2015. I v p ►/ ' y�' k 9) Kona9- Same as above. Via• 4; air tx- T r 10) Kona10: Same as above. Offil k- _ - FTS ;f :: »_�vr'��j• `'0.- ••. _ AV t.. 4) Kona4: Aerial Photo of Kailua-Kona Pier Bay Area, morning after June 19, 2021 Flood. We had just finished a flood mitigation project on June 18, 2021, that proved successful the very next day on June 19,2021, no additional water went beyond the erosion controls. The erosion controls we built caught a lot of the mud and slowed down the water, so that it could percolate into the ground, rather than speed down the mountainside, taking rocks, debris and soil and anything else with it. Our erosion controls were 100% successful in a real proof test that caused millions of dollars of damage to the North and South of it, yet this worked-on corridor proved it worked. The other areas NOT designed with proper erosion controls allowed Mud and Rocks and debris to enter the ocean and thus kill trillions of Coral Polyps along Kona's Coastline. �u � by 5) Kona5- Aerial Photo of Muddy Waters entering the Ocean fronting Kailua_Kona Town, such a travesty for all the severe damage to the Ocean. + ai-� ,, 1 ,•. • _ •.1 71 11) Kona11: Kailua-Kona Pier Bay Area by King Kamehameha Marriott Courtyard Hotel and Alii Drive by Hulihee Palace, etc. up to South of Casa De Emdeko, BEFORE 2015 Flood. k 12) Kona12; Kailua-Kona Pier Bay Area by King Kamehameha Marriott Courtyard Hotel and Alii Drive by Hulihee Palace, etc, up to South of Casa De Emdeko, AFTER 2015 FLOOD. Aw - rte,.-:;1' �Fr'7C�24• ^_' :`.�. '; t 400 IV 45) Kona45- Same as Photo Kona11: Just to reiterate and emphasize that we need to keep our ocean waters clean. Kona didn't have an intensive sugarcane and pineapple industry as Hilo and the other islands had so we didn't have they years of mud, chemicals and debris being dumped into the coean, so our ocean life here is more pristine than other places in Hawaii. But the recent flooding are occurring more frequently and are getting muddier, killing trillions of coral, which alone takes decades to recover, but vcan't if we have these muddy floodings occurring so often. k 46) Kona46- Same as Kona12- What a travesty for what occurred in 2015 to Kailua-Kona Bay fronting Alii Drive, Hulihee Place, King Kamehameha Marriott Hotel, Royal Kona Resort, going South past Casa De Emdeko, due to some careless land clearing up mauka that was unpermitted and that blocked or diverted waterways, sending mud down into the ocean, such as possible examples in photos Kona7, 8, 9 10, 38 and Kona39. 47) Kona47- Clean, crystal clear Kona Ocean Waters showing healthy coral before the floodings. �`' � by 48) Kona48- Same as Kona5, June 19, 2021 Flood results, just to emphasize the seriousness of the mud waters and pollutants during floodings and the horrendous damage to the Ocean immediately and in the future. This was preventable and should NOT have occurred. There will be a day that it will become irreversible as shown in Photo Kona50, which occurred in the Mediterranean Sea due to runoff waters. This was created due to an overgrowth of algae. 1' .AN• a Y / 1 dr �V Z L 49 i I - ' 44 ~•r ••`YY� ,�Y t Ar fir. � �• mil a�. s MLftr '. ;�: F , r 49) Kona49: Same as Kona 48, June 19, 2021 Flooding. This was preventable and should NOT have occurred. There will be a day that it will become irreversible as shown in Photo Kona50, which occurred in the Mediterranean Sea due to runoff waters. This was created due to an overgrowth of algae. k 51) Kona51- Same as Kona12 however it just emphasizes how disrespectful we are of our Ocean and surroundings. a 57) Kona57- Algae Blooms as a result of contaminants and pollution caused by flooding in the kailuaa_Kona Pier areas. The Algae Blooms can kill the coral too, but more so the mud and contaminants introduced by the runoff floods. 13) Kona13: Erosion Controls such as high quality groundcover and Basins with Canadian Drywells installed as shown in Photos Kona6 and Kona52(actual photos of the areas with the flooding problems but mitigated, these photos Kona6 and Kona52 are actual photos of the area AFTER the erosion controls were put in. No mud waters or excess runoff were generated off this area while being properly maintained for Years. When erosion controls are not properly maintained, flooding can reoccur. ` Kona13 Photo is an area below that has the basins and swales too, series . : a of 4 berm/swales minimum and basins on 4 acres belonging to Wilkinson, formerly George Hagiwara (and some Canadian drywells on the property below), designed in 1969 by SCS Kwon Sing Paik that helped tremendously , but without maintenance got partially damaged by pigs, cattle and equipment operators that ran them over as path routes. ' .. Erosion Controls were refurbished thankfully by D. Wilkinson in 2021. This was in response to an illegal diversion and breakage of an erosion berm, by some other party, purposely yet illegally done to divert water from one steam on the North side to another 700 feet away to the South on Wilkinson'sland without permission from Wilkinson, nor an regulatory p Y agency.. This negatively impacted Wilkinson's land and landowner's below his place, until the unpermitted, illegal diversion could be fixed/corrected The County Engineering got involved thankfully and ordered a fix and it is working well today, avoiding a major flooding a day after completion, whereas neighboring North and South areas got hit hard with millions of dollars of damage, that didn't have the proper erosion controls. This emphasizes the need for proper erosion controls and for them to be maintained in the future and even to be recorded so new landowners do not damage them. � 1 .-,•. , :,,,�_ •:. : • ,� '�.� tea..: ti. �LC 14) Kona14- Kona Uplands severe damage in Mauka Kona above Kailua-Kona after June 19,2021 Flood. For this area, severe flooding has happened at least 3 times, for this subdivision, at least 2 times, there is a need of better erosion controls. Soil and debris from this area ended up in the Ocean, creating damages and contaminating the Ocean and Coral Life. Photos Kona4 and Kona5 are from this flood. I am not interested in finger pointing here, just correcting it so it won't repeat itself. 15) Kona15: One of my projects in Holualoa that was very steep and prone to severe soil erosion . The basin at the very bottom right side use to overflow with mud but now no runoff even reaches there since the other higher erosion controls handle it. All the erosion controls on this property work perfectly. Consist of several small to medium capacity basins, swales and Canadian Drywells. Also the groundcover is a high quality groundcover that holds the soil from erosion and helps the runoff percolate down instead of sideways. 16) Kona16: Same project as above in Holualoa, close up of high quality groundcover which germinates to hold soil in 3 days. This photo was taken the day after the flood of June 19, 2021 and performed 100 % successfully, no water sitting, no runoff went beyond even the first basin. Also close up of Basin, Basin Spillway to the very left(southside not makai side) of basin and Canadian drywell on F . high side of basin bottom to allow sediment to settle F " first then clearer water to drain, keeping basins dry and 100% effective and 100% capacity for the next rain which may occur the very next day. Basins that hold water are good only when emptier, and if they stay full, create mosquito and toad problems, which in turn create Dengue Fever Potential if present and Toad toxins for dogs and other pets. Sitting water also gets smelly and also creates haven for �4 . ringworms, and other water borne parasites and pathogens.. t, u '., z i. r 17 Kona17- Same property as above in Holualoa. Basins all still d after flood of June 19 2021 that caused millions S p p Y dry J , of dollars of damage to the North and South but not in this Y4 mile wide corridor. Basins elsewhere in Holualoa without Canadian Drywells or fractured bottoms were still full of water, weeks after the June 19, 2021 flood. That translates to those basins with water still in them being less effective than the full potential, against flooding. 7: �" � 7" _ 1x'4 / l _.-\� _ �\ •'`!`\ ` �,, a� �+. � - I.I. i ..� �. Y. /,���': •x��.� • i4':.. Nn • 18) Kona18- Another property close by photo taken same day after the June 19, 2021 flood. No erosion controls, no groundcover and even if not as steep, this property sustained lots of erosion and runoff and soil loss. Kona19: One of the problem sites that I believe contributed to the 2015 flooding of Holualoa and the extremely muddy waters off the Pier area. This area feeds Waiaha Streams and Horse Shoe Bend Streams. The runoff ends up in the Kona Tike area but the currents •�•: �" i� take the mud and contaminants to the Kailua-Kona Bay. S.t Historically it does this and presently too, as witnessed by those who got to see the muddy waters work its way to the Kailua-Kona Bay area as shown in Photo Kona12, �. the day the floodwaters muddied up the Bay in 2015. According to County Records, and a field visit by the County, bulldozed debris and boulders and soil created r rerouting and overwhelming of the streams up in Waiono.. The 8 to 10 million gallon reservoir, Luawai, is •• _ in this photo Kona19, it seems like it has weakened i , retaining walls/berms on the lower side when inspected , t f many years ago, so should be restored to a stronger , •�� -�, � � state. Also below the Large Reservoir is a 90 degree bend in the Waiaha Stream, which makes a flooding disaster possible, since water at huge volumes has a hard time to make 90 degree bends.. The surrounding �x„x •�. ., area to the South we added erosion controls that conformed to the natural lay of the land and worked quite perfectly as shown in Photos Kona6 and Kona52. `` •;;; Basins never overflowed. In 2015, the floodwaters did + as shown in Photo Photo Kona12 but since then, the erosion controls installed after that in 2017 and 2018 worked so well, muddy waters have been almost eliminated from this South side portion only, consisting of about 15 acres, whereas the other 200 acres or so need yet to be improved with erosion controls and also runoff diversions/plugging by debris have to be further removed and rectified. 20) Kona20- In whatever way the land is utilized, for buildings or crops or other purposes, erosion controls can be integrated into the development to mitigate flooding, increase the aesthetics and the quality of the Land. I this photo are coffee and some fruit trees, using groundcover, basins, Canadian Drywells to mitigate flooding/erosion issues. Photos Kona15, 16, 17, 25, and the Foreground of Photos Kona31 and 32 are of this same property. No flooding has occurred on this property or due to the land clearing ea o ow I of this property. Please notice h the groundcover has to be high quality, as shown in Photos Kona31 and 32, where the Ground cover r 3 seed did not germinate in the backgrounds of each photo, on the background neighbor's property not on my project site. It's about doing things right the first time. 21) Kona21: Before Photo of Illegal, unpermitted Diversion of Gomes Stream To Wilkinson Stream dangerously diverting one stream to another stream, 700 feet away, overwhelming Wilkinson Stream. (also photos Kona28 and Kona29 portrays portion of illegal diversion, of intentional broken open basin by machinery ). Corrected by maintaining Gomes Stream to original, historical pathway as directed by Landowners/Managers •� � � (�� Y , !.,r ,� tL�_ �'� •�< , � of Gomes Stream pathway such as T. Gomes, in presence of County ►. -�, Engineering Inspector Brian Standley,(and to appropriate Gomes Stream n , 4 Deep Drywell and also existing Gomes Stream Culvert on Mamalahoa r' Hwy), fixing 7 key areas in approx. elevation areas of 1600 feet to 1700 ° . feet, by 1)Plugging/repairing opened rock wall that was part of illegal diversion, plugging with rebar reinforced concrete, 2) Fixing a South most t � 1 ,��r •`_ basin/berm that had been broken open by machinery to divert the water ggfiF` illegally, 3)Cleaning out, increasing all basin capacities involved, 3) Compartmentalizing long berm to insure Gomes Stream doesn't flow South but instead to original historical stream pathway first to the Northern makai basin then to the north old original existing Gomes Stream Pathway(that leads to the existing Gomes Stream Culvert and Drywell down at Mamalahoa Hwy at 1500 feet elevation) , 4) Fragmenting the rock bases of all the swales to increase drainage, 5)Adding Canadian Drywells in South Basin and North Basin 6)Adding and cleaning out all basins and adding swales and new basins and berms, 7)Adding High Quality Groundcovers to exposed Erosion controls, completed on June 18, 2021, put to test by real A't •� �' ` �{t�r/ � rw_3/ "4x- ~� flood that flooded areas North and South of this project by in the project, everything proved successful, by stopping and keeping all runoff on the subject properties. After Completion Photos of this project include Kona 13, Kona 22, Kona 33, Kona24 and Kona 30. Photos Kona16, Kona15 and Kona17 show erosion control work for same streams area corridor but further down in elevation at about 1400 feet elevation, adding several lines of defense to prevent muddy waters from getting to the oceans/and or causing damages on land. Thanks for Rainoldo Cancino and also Dave Wilkinson and Ray Takeguchi for assisting in the fixes and corrections. LIT ... �•�.v}.�•�;..Yo- ': u:.. . . '.y = -- 22) Kona22: Lowest Northwest Basin/Canadian Drywell in Gomes Stream vicinity, cleaned of debris, increased in capacity by size and depth from original state, added Water fracturing to increase drainage and added new Canadian drywell in high side of Basin, cleaned out and regrassed original North spillway to resume Original, historical Pathway of Gomes Stream according to T. Gomes as told to Brian Standley (County Engineer and me and others on tour). Worked successfully day after completion in a real flood test(June 19, 2021 Flood) by NOT flooding even if North neighbors and South Neighbors in Holualoa vicinities sustained millions of dollars of flood damages in same flood. IW 1 �, t } lNk 1�• 23) Kona23- Photo taken Day After June 19, 2021 Flood that created major damages to North and South Vicinity Neighbors Such as Waiaha Streams, Kona Uplands Subdivision and Kamalumalu Areas however these series of erosion controls stopped the runoff from leaving this property where these erosion controls were fixed and improved. Swale Bottoms were later fractured more to increase drainage and capacity. .1r •i �' + �„ a ip `��: r rC •Iri. ,'ifl ^vt�ii•fY� liir,.l�il. -'J6'i• '•} � ] 24) Kona24: Isolation Berm to Compartmentalize this Berm to stop illegal stream reroute and improve capacity of Erosion Controls and maintain original historical route of Gomes Stream according to T. Gomes to original and existing Gomes Stream Drywell and also, existing and original Gomes Mamalahoa Hwy Drainage Culvert. All the erosion controls on Gianulius Property in this section were cleaned out, fixed, improved with larger capacities, grassed and now being maintained also, with 100 % successful rate despite enormous rains since the completion and especially since that June 19, 2021 Flooding which these erosion Controls were successful against any flooding. ,1 s w�� Rk NOW 25) Kona25- Below the Gianulius Property and Wilkinson Property is another erosion control line of defense, please note no signs of flooding due to High Quality Groundcovers and Erosion Controls on this property such as Swales, Berms, Basins and Canadian Drywells not visible in this photo but visible in Photos Kona15, Kona16 and Kona17. O^FF t4 w 26) Kona26: Both tracked vehicle and 8 Wheeler got stuck. Good Erosion Controls can reduce this types of areas where drainage is a continual problem. Throughout upper Kona, erosion controls have been built that reduces this type of bogs which contribute to quicker runoff thus flooding. This situation here is not good for crops, homes, roads etc. ;,� ',;:��Y'n;• ;;may ,,���,,.�.- ti ;, � � • :�',�; • description as K• • ti 28) Kona28- Illegally diverted water (roughly 300 to 450 Cubic Feet Per Second CFS Volume) from Gomes Stream to Wilkinson Stream which is 700 feet away from original Gomes Waterway Z through other landowner's properties. (Also seen in Photo Kona21) this is area where the rerouted y" water was opened up with machines of a berm/basin, which caused major flooding on Thanksgiving Day 2020, unseen in the history of the areas affected by landowners who had the properties for generations. This illegal diversion was corrected under supervision of the County and successfully so, even improved, as seen by Photos Kona13, 22, 23, 24 and Kona30. kA"Jf f y ' R 29) Kona29: Same description as Kona28 except this photo is looking down to the ocean from the mountain. Kona28 is looking from Makai looking mauka toward Gianulius coffee trees. Please note large Swath of Water volume that came down, it overwhelmed the Stream it was "u �` ' illegally diverted to, causing costly damages. After the Fixes and improving the original erosion controls completed on June 18, 2021, it was able L, to be 100 % successful against the June 19, 2021 -:: Flood, the day after completion. No water went past the Erosion Controls, the way it was meant to be. Maintenance is however needed to make sure any illegal diversions dont occur again 2,N11 _ - and/or basins and other erosion controls stay clean and effective. ry h `�-�. 11 'L 1� r,`y,,, it ; Y:an•- 30) Kona 30: Same photo view as Kona29 except after Berm and Basin were restored and improved and other areas of the erosion controls restored the original waterway of the Gomes Stream and also improving the effectiveness of the erosion controls by cleaning them out, removing vegetative debris, fracturing the swale and basin bases to improve drainage. 31) Kona 31: Same area but lower elevation in Holualoa along the same mauka-makai corridor at 1400 feet elevation. This photo shows "-" how High Quality groundcovers and erosion controls are extremely important, Foreground property shows zero erosion whereas back side property that was bulldozed same time shows lots of erosion. Just an example of immediate - costs due to this seeming little damage- just a 4 inch layer of topsoil loss amounts to over $70,000 cost of soil replacement value per acre. Property in back, just as an example, is 2.5 acres, this would amount to over $175,000 in just soil replacement cost and that replacement topsoil is not as good as the original Kona Topsoil lost. So groundcover and other erosion . :� ;. controls such as Berms, swales, Basins and Canadian Drywells are very valuable, they just cost a fraction of the cost of lost soil and future flooding problems and overall property value and damages. `rt. �4. 7: 71wrP G . pow 32) Kona 32: Same Description as Kona31, just shows a bit of the erosion control of foreground property's Affective Basin and Canadian Drywell in Lower Left hand corner of photo. Effective too because note the other Basin in the other photo has sitting water, whereas this one on this grassed property is dry. Better Groundcover, better Canadian Drywell. 33) Kona33: Just to the right of the paved roadway, which is Kuahewa Road in Keopu Aina Subdivision in Keopu Mauka area, behind the fence posts is a Basin and Capped/Grated Drywell, engineered by Dave Grenier, These work Top Notch Superb. Despite the heavy rains, the basin is dry. Canadian Drywell is the same principle and more simple and cheaper to build -- t - however the Dry Wells have higher capacities and easier to clean out, should they get mud in them v somehow. Dry Wells and Canadian Drywells �' — F- - -- should always be elevated above the base of the R basin, that way mud and debris are less likely to plug the wells. Also the Basins should always I have a good spillway, not to the ocean side of the berm but usually to the side that is less likely to IH � h E broke open and fail. Also please note that the B spillway is lined with Rock/Cement to reduce spillway erosion/failure. Really Top Notch built subdivision, the Engineer did an awesome job. Subdivision is Keopu Aina Subdivision, just North of the Old K Komo Store. 34) Kona34- Same Subdivision as Photo Kona33- Show basin to the right of the bigger basin. Difference is one holds water since it has no Dry Well nor Canadian Drywell whereas the bigger, dry basin to the left has a Drywell. This purpose for this is to catch mud in the first basin as an extra precaution and secondly to hold water for livestock. Problem with standing water though is mosquitoes fi which was a problem when Dengue Fever was here in Hawaii and also the odor and that pet dogs come out of them muddy and dirty.....Lots of parasites in the water too, since A r�, � ' wild pigs wallow in them too. Honeybees that i,W *qtr visit these ponds for water get deadly diseases for the hives. spt LIMIT Jg 35) Kona35- Same Pond description as described in part of Photo Kona34, same subdivision. taF. R a'� �y.ra,,o3 q l�.;R$ W(� � R u,, 4 0 �`�����`t't a` 'S� dyj'�� ��r v �1�ra�.�' �. ��•,��'� 37) Kona37. Huge Basin built I believe in the ►` 1970's in upper Captain Cook. This one is roughly 150 feet in diameter, and 40 feet deep. Nowadays though, they should be fenced in, because when full, they are a risk for drowning. These I believe have filled up in floods that why like drywells in them so they drain better. Having I a series of basins helps too, that way there is not just one "line of defense". These are very effective though and have prevented more flooding and mud from reaching the ocean over the decades. Sizes can vary to accommodate the subject area to be protected. This is below the old Kealakekua Ranch. There are number of these Kill I throughout Kona, they have worked well. r _ , p jr 38) Kona38: In Waino Meadow, Upper t. 5' Holualoa, a common mistake is to push vegetative materials and unknowingly block existing waterways, thus causing flooding below. This area contributed to the flooding of the Kailua-Kona Bay in 2015 as shown in Photos Kona 11 and Kona12. Some correctional work which was very successful f occurred in 2017 and the correctional work under County Permit is shown in Photos Kona6 and Kona52. No muddy runoff since then, but key is maintaining those erosion controls and r -�l groundcover properly over the decades. y � � •, ,,� �4--.'� � � �� €;.� � � .,a.- - �.. _mit �E. T I � IV. P 39) Kona39- Bulldozed debris blocking waterways as described in Kona7 and Kona38. ss a,Y, J 52) Kona52: After Photo of correcting Flood inducing practices as shown in KonaPhotos 7, 8, 9, 10, 38 and 39. Doing it this way prevents disastrous flooding to Land and our Ocean as shown in Photos Kona1, 2, 3, 4, 5, 12, 46, 48, 49, 50, 51, 57 and Kona59 !!! r� 53) Kona 53: Proper Respectful way to prevent flooding, prevents high costs later and damages. Project in Holualoa. High Quality Groundcovers, Basins, swales and Berms. Maintenance of these erosion controls are also very important. w ry 9 -i Y4. OTT- ,. . .._....,.,... mss.. _ .._._... ... ._., 54) Kona54- Same as Kona53- Proper Respectful way to prevent flooding, prevents high costs later and damages. Project in Holualoa. Maintenance of these erosion controls are also very important. • i it 55) Kona55- Project in Upper Kainaliu on one of my former orchards, with many erosion controls that were 100% successful, high quality groundcovers that are maintained, basins, berms, Canadian Drywells, etc. No Ohia trees were removed or damaged in this farm and instead fertilized with some high quality fertilizers and amendments to keep it healthy and lush.. - r k IF Jf i `i N 1 - 56) Kona 56: Same Orchard with many erosion controls to prevent flooding and keep ocean clean. 100 % successful with no flooding. Erosion controls and groundcover needs to be maintained to be 100 % effective and successful. No Ohia trees were removed or damaged in this farm and instead fertilized with some high quality fertilizers and amendments to keep it healthy and lush... Af 446. ! Ilkyy11 { Al f r ' ' L+, r V i+ J f 58) Kona58: Remedy to Kona28 and Kona 29 by repairing intentional damage and illegal diversion of runoff. This cured the problem and has proven successful against current runoff. The erosion controls and measures have restored the Original pathway of Gomes Stream and prevented flooding as evidenced on June 19, 2021, when nearby places without these types of erosion controls flooded and this place didn't, and ever since then too. Key too is the maintenance of these erosion controls to keep them with high quality groundcover, the spillway intact, the basins and Canadian drywells functioning and clean. 59) Kona 59: Flood waters just North of this project with these restored and improved erosion controls as shown in Photos Kona13, 22, 23, 24, 30, and Kona58. Areas close to this project without the effective erosion controls experienced severe costly damages as shown in Photos Kona1, 2, 3, 4, 5, 12, 14, 18, 40, 41, 42, 43, 44, 46, 48, 49, 51, and Kona57. Doing it right the first time would prevent all these costly damages, for decades to come. I H �* i FYI •`.�d s.. .r •f `` _+ j.c --• ��',lye •A- basins of debris. _ 1 R •*�adz, ' 4:1 Ar A ��yy pat--� '1s :'- '°`•�" _- �,sr�.r�1 �; �'z i� z�y y.y, � n" ��' � • 1 fRt r�� ,crTeR �: y o ' �F ' o-o �� •—— • • — • — —• — • f aoto eve +y4 i g 5R.1 h l �r.�� �F�,��i,, '�• �. 49 k ti + i �S Y" 62) Kona62- Same 4 acre parcel owned by D. Wilkinson in Holualoa, as in Photo Kona61, except this is Berm/Swale/Basin #2 counting from the west makai side. It is # 2 of total 4 of the erosion control series on this 4 acre parcel designed and built back in 1969 by SCS Kwon Sing Paik. The berms start of at about 3 feet high at the North start end then in this particular#2 Swale/Berm, it is about 12 feet high at the South end where it exits into Wilkinson Stream, also known as Takeguchi Stream. • J K'"e for Wc% � : 1W Si. 63) Kona63- Same Berm/Swale/Basin #2 Series as Photo Kona13 and Kona62 and just about 120 feet mauka(East) of Berm/Swale/Basin #1 as shown in Kona61 on D. Wilkinson 4 acre parcel in Holualoa. . Key is maintaining all the erosion controls in the future too, to keep them 100% effective and successful. Advance apology for typos and/or errors, tried to be as accurate as possible with information but errors may be present. - Li V - - tj �r r 40) Kona40- Couldn't obtain photos of cars swept in flooding so using the recent flooding in Germany. In Holualoa, 2 different streams, one near Holualoa School and the now Kahakai School, had wrapped cars around trees. ", � �_..�. �+� � .tea• �. � '� j�„�1 •;� t'..y..- � .y1 41) Kona41: In Germany but example to show what happened in Holualoa, Kailua-Kona Twon and Kainaliu during flooding. J � 42) Kona42- In Germany again but to show damages that had and can occur again in Kona again, 43) Kona 43: In Germany also but to show an example of what has happened JIM ,:: . _ �` •�` . - in Kona in the past and can occur in Kona in the future, even worse when more homes and infrastructure are put in the �F_ ways of hidden waterways. Kona Hillside ��/ ;:� ?= Plaza, Kahakai School, Wyndham Main as ��d : • Office In Kona, Kona Town, Kainaliu town, AF Kona Uplands Subdivision, The Mormon Temple in Kona town just South of Lowes, 1►L■ L the YWAM base and many subdivisions - :' - - and other populated areas are in or very close to water floodways.....the FEMA 5 I _ . maps are not as accurate as should be. r- f lr' k4ke4�.i t � - Ifht� •. 1 M11�k y .71t • � 1 IM low r Ary 44) Kona44- In Germany again but what has happened in Kona in the past and can occur again. We just forget or the new generations don't know about it. Lives and a lot of property damage have occurred in past Kona floodings. It will be worse when Kona gets more populated and developed, and more infrastructure gets put in, without proper planning and correct safety and preventative measures.