Initial Hurricane Ike Assessment for Coastal Operations Coastal and ...
Initial Hurricane Ike Assessment for Coastal Operations Coastal and Nongame Resources Division Michael Carloss, Todd Baker, Cassidy Lejeune, Ruth Elsey, and Guthrie Perry September 23, 2008 Introduction On Saturday September 13, 2008 at 2:10 a.m. CDT, Hurricane Ike made landfall along the Texas coast near Galveston as a Category 2 hurricane with winds of 110mph. Although only a Category 2 hurricane, Ike exhibited an unusually large wind field which caused a projected storm surge of a Category 4 height. The 2:00 a.m. NHC advisory cited tropical storm winds extending 275 miles and hurricane force winds 120 miles from the center. The storm surge ahead of Ike blew onshore onto the entire coast of Louisiana causing flooding well ahead of Ike’s Texas landfall. After landfall and during the day, Ike began a slow turn to the north and northeast and became a tropical storm southeast of Dallas. It became a tropical depression shortly afterwards and continued moving northeast through the Midwest with Hurricane-force wind gusts east of the center across parts of Arkansas, Missouri, Kentucky, Indiana, Ohio and Pennsylvania. If current estimates of $27 billion to U.S. coastal areas are accurate, Ike will be the third costliest U.S. hurricane of all time behind Hurricanes Andrew and Katrina. Wind speed and storm surge information from Ike can be viewed on the websites below: http://www.nhc.noaa.gov/archive/2008/graphics/al09/loop_S.shtml http://www.srh.noaa.gov/lch/ike/ikewinds.php http://www.srh.noaa.gov/lch/ike/ikesurge.php Wind and Tide Information for Coastal Louisiana from NOAA NOS Stations Wind Data
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All of Coastal and Nongame Resources Division’s WMAs and refuges experienced some impacts from Ike in the form of flooding and/or high winds. As anticipated, areas in the southwest, closer to hurricane landfall experienced more damage than those areas to the east of landfall impact however flooding was widespread throughout the southeast as well. From September 14-18, personnel from Coastal Operations assessed hurricane damage to Coastal Operations’ properties both from the ground and air. Aerial surveys via helicopter were flown on September 16th and via seaplane on September 17th. This report is preliminary and primarily based on initial assessments, limited weather data and limited access to some areas. A more detailed report will be compiled once in depth field investigations have been made.
SOUTHEAST COASTAL OPERATIONS’ AREAS Pointe aux Chenes WMA: Comments: Hurricane Ike had one of the largest tidal surges ever recorded at this WMA. The tidal surge experienced at Pointe aux Chenes WMA was approximately similar to that of Hurricane Rita. Hurricane Ike submerged the ring levee at the headquarters and inundated all buildings with approximately 6’ of water. Between the two storms, Pointe aux Chenes WMA was significantly damaged. The strong winds of Gustav did severe damage to buildings, marsh, and management features while the tidal surge of Ike inundated the same features which caused additional damage. Buildings: Residence – Lower level inundated with 6’ of water damaging wiring, insulation, and contents. Boat Shed on St. Louis Canal - Inundated with 8’ of water resulting in dock damage. Pump Shed - Inundated with 6’ of water damaging wiring and insulation. Fuel Dock - Inundated with 6’ of water – no additional major damage. Storage Shed/Dog Pen - Inundated with 6’ of water damaging wiring and insulation.
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Storage Shed/Playhouse - Inundated with 2’ of water. Moon Room – No additional damage; building was total loss from Gustav. Quonset Hut – No additional damage; building was a total loss from Gustav. Boat Storage Shed - Inundated with 6’ of water damaging wiring and contents. Bunkhouse – Lower level inundated with 6’ of water damaging wiring, water heater, and contents. Tractor Shed at Farm – No additional damage. Bridge to headquarters damaged – Appears to have been lifted 3” on south side.
Pointe aux Chenes Headquarters and Point Farm
Equipment: 8” electrical water pump inundated – will have to be repaired/replaced. Tractor harrow inundated and will have to be repaired. 12” PTO water pump inundated and will have to be repaired. 10’ bush hog inundated and will have to be repaired. 5 ton central A/C inundated and will have to be replaced. Marsh: The marsh was inundated with high salinity waters in excess of 9’ in depth. This surge eroded several acres of marsh by rolling it over on top of adjacent marsh. Several small islands of marsh that existed pre Ike were completely removed. The high salinity content burned the fresher marsh communities found in the Montegut and Pointe aux Chenes Units. Submerged aquatics were also significantly impacted. Before Gustav and Ike hit Pointe aux Chenes WMA, submerged aquatic vegetation (SAV) dominated by widgeon grass was abundant and dense in all management units. The SAVs were also found in good abundance in several locations outside the management units. Gustav and Ike devastated most of the SAV removing up to 70% from the WMA and nearly 100% from the larger bodies of water. What SAV still exists has been found balled up in the fragmented marsh of the management units. The storm surge overtopped the small ring levee on the farm and the cross levee located behind the tractor shed sending high salinity waters into the bottomland hardwood mitigation plantings on the farm. In excess of 800 acres of mitigation tree plantings were flooded with high salinity waters for nearly a week as well as mechanically stressed these trees from high storm winds.
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DRAFT These impacts are expected to stress many of the trees as this was the second such flooding in less than a month. Impacts to the mitigation plantings will not be known until Spring 2009. The most obvious impact is that the marsh and ridges appear to be bare. The marsh is laid flat and the woody vegetation has been stripped of leaves and many branches. Management Features: Grand Bayou Unit o Levee system scoured. o The five breaches created by Gustav were further eroded by Ike. o The limestone on the Grand Bayou gates has been washed away. o Severe scouring was increased on the water control structure on St. Louis Canal. Montegut Unit o Levee system scoured. o Breech in southern levee increased in size. o Severe damage to the older and larger water control gate. The walkway has been removed and the entire structure is leaning. Montegut Levee Breach
PAC/DU Unit o Levee system scoured. o Island Rd Shoulder removed. o Island Rd Structure severely damaged and west wing wall swings with tide and the I beam is torn in half; east wall is detached from the gates. o S2 structure has severe scouring on both wing walls and most of rock has been removed o S3 structure is in tact but much of the rock has been removed and top of culverts is scoured. Handicap waterfowl blinds received severe damage and are unusable. Island Rd. Boat Launch o Parking lot severely scoured and several tons of limestone have been removed. Grand Bayou Boat Launch 6
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o 1 dock missing on St. Louis Canal Launch side. o 2 of 3 street lights leaning, 1 light is out. o Additional scouring of limestone occurred. o Debris was deposited on bridge and parking lot. Boundary signs – additional signs removed. Campground – Picnic tables missing.
Wildlife Damages: The large flooding event pushed many animals off the WMA and others perished. Soon after the storm, concentrations of animals such as raccoons and nutria were found gathered on features that were elevated out of the water like oil and gas infrastructures and trees. Other wildlife were found concentrated in small towns such as small herds of deer observed in Montegut, and Chauvin. Some mortality was observed such as with nutria and isolated fish kills.
Salvador WMA: Comments: The tidal surge experienced at this WMA was higher than what was experienced during hurricanes Katrina, Rita, or Gustav. The surge was 6 to 12” higher than Rita and inundated all buildings at the headquarters, except for the supervisor’s residence that is significantly elevated. The workshop below this residence did flood. The water level at the headquarters was approximately 4’ high on the lawn. The floodwaters also overtopped Hwy 90 at the Pier 90 boat launch east of Boutte. This storm was not a significant wind event at this WMA. Buildings: Main Headquarters – Porch inundated with water and all sides of the building went underwater damaging insulation and possibly wiring, 5 ton central A/C damaged. Elevated Headquarters – Lower level inundated by 4’of water damaging water heater, wiring and contents of lower level. Boat Shed – Inundated by 5’ of water damaging wiring and docks. Generator Shed – Inundated by 4’ of water damaging wiring, panels, and generator hookups. Tool Shed – Inundated by 4’of water damaging wiring, insulation, and front steps. Airboat shed – No additional damage. Gazebo – Inundated by 4’ of water damaging wiring and flooring. Tractor Shed – No additional damage. Pier 90 shed – inundated by 2’ of water damaging contents.
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Equipment: 2550 Kubota Tractor with front-end loader – Inundated - Will have to be replaced. 15 KW Gas generator – Inundated – Will have to be replaced. 10 KW Diesel generator – Inundated – Will have to be replaced. 60”Gravely lawn mower – Partially inundated – will have to be repaired/replaced. 60” PTO grooming mower – Inundated – Will have to be replaced. 5hp self-propelled mover – Inundated – Will have to be replaced. Stihl weed-eater – Inundated – Will have to be replaced. 1 set of tools – Inundated – Will have to be replaced. Marsh: The entire WMA was inundated with a high salinity storm surge. The high waters lasted for approximately five days and only the northern ridges were higher than the water level. Salinity observations were taken the day after the storm and were noticeably higher than normal but not significantly high enough do extensive damage to the marsh. All sample observations were less than 4ppt. However the combination of wind damages from Gustav and high water levels from both Gustav and Ike have knocked down most all of the herbaceous vegetation and have stripped much of the short woody vegetation of its leaves. The marsh is much like Pointe aux Chenes and appears to be bare and open. Submerged aquatic vegetation (SAV) was difficult to assess due to the high water levels at the time of this investigation. However evidence was found that suggests that some was lost but the majority remains intact. Many of the hyacinths were removed as result of the high tides, but they have not been eliminated. Management Features: Several boundary signs have been knocked down and are missing. Wildlife Damages: Many of the eagle nests on the WMA have been knocked down. This was believed to be a result of Hurricane Gustav, but they were not noticed missing until this assessment was conducted.
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DRAFT Deer are believed to have faired well for this storm. Many were believed to have been pushed off the WMA for a short time due to the high water levels, but some were observed on the area and are in good condition. No rabbits were observed and are believed to have been pushed off the WMA or have perished.
Pass a Loutre WMA: Comments: Hurricane Ike and its storm surge were relatively insignificant at this WMA. There is no evidence to suggest that water levels were any higher than an unusually high tide. There were tracks in the mud at the headquarters that were left two days before the storm that were in tack and not weathered two days after the storm. Buildings: No observed damages. Equipment: No observed damages. Marsh: Additional salt scalding was observed on the delta duck potato and other emergent vegetation. It is believed that Ike pushed in higher salinity water that is having an adverse impact on the duck potato, cattail, three corner grass and other emergent freshwater vegetation including the submerged aquatics (SAV). These impacts however, are not abnormal for this time of the year. During the months of September or October we generally observe salinity levels start to climb until January. It is also common to see the fresh water vegetation begin to decline in response to the increased salinity. The only obvious differences this year in the marsh compared to a normal year is the Roseau cane and trees that were pushed down as a result of Hurricane Gustav. Hurricane Gustav also pushed down many of the dead trees that were killed and still standing from Hurricane Katrina. SAV’s were adversely impacted from Gustav and Ike. Pondweed (Potomageton sp.) seems to have survived fairly well were milfoil, coontail, others did not. Most of the SAV except pondweed was removed as a result of both storms. Most of the hyacinth was removed from the WMA by both storms. Management Features: Freshwater Impoundment – Two levee breeches were observed after Hurricane Ike. Campgrounds – Significant damage has been observed at all campgrounds as a result of both storms. o Docks are damaged. o Self-clearing permit stations are damaged and fallen. o Picnic Tables are missing. o Debris is covering several campgrounds.
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Several boundary signs have been knocked down and are missing.
Wildlife Damages: None observed or expected as a result of Hurricane Ike.
Biloxi WMA: Comments: The combined storm surges of both Gustav and Ike have flattened the marsh vegetation of Biloxi WMA. These impacts are expected to be temporary and the area should recover in the spring. Much of the SAV has been removed from the WMA but limited amounts can still be found in the smaller ponds on the WMA. The good news about the WMA is that it appears to have more SAV than the surrounding marsh. Lake Boeuf WMA: Comments: High winds from Gustav downed several trees on this WMA. The high storm surges to the south of this WMA led to poor drainage around this WMA which resulted in high water levels on this WMA. The water levels were elevated for the entire first half of September but the impacts are not expected to be detrimental. Impacts to game resources are expected to be negligible on this area.
SOUTH-CENTRAL COASTAL OPERATIONS’ AREAS Marsh Island Refuge, State Wildlife Refuge, Isle Dernieres Barrier Island Refuge, and Atchafalaya Delta WMA sustained moderate to extensive damage from Hurricane Ike. The south-central portion of coastal Louisiana experienced a tidal surge of water to an elevation of approximately +4 feet near Isle Dernieres, +7 feet at Atchafalaya Delta, and +8 feet in Vermilion Bay (see above NOAA tidal surge graphs for more information). A majority of these areas were completely inundated by water. However, a few of the higher ridges, levees, spoil banks, etc. were not submerged during the storm event. For example, some of the islands with greater elevation (e.g., Big Island, HQ Island, etc.) of the Atchafalaya Delta WMA did not completely flood during the storm (see photo).
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DRAFT Example of Surge Height - Photo of Wrack on Campground at Main Delta
High Water Mark
Wind speed in the vicinity of these areas ranged from 10 to 40 miles per hour when Hurricane Ike made landfall on Louisiana’s coast. Maximum wind gusts were approximately 55-60 miles per hours (around 50 knots) according to NOAA’s meteorological observations (see below). Wind speed at Atchafalaya Delta Headquarters (source: NOAA NOS station)
Below is a brief description of damaged that was documented during a post-storm assessment of the buildings, equipment, management infrastructure, marsh, and wildlife at these areas. Overall, the areas sustained considerable damage as a result of Hurricane Ike. Isles Dernieres Barrier Islands Refuge: Comments: An aerial overview of the entire Isles Dernieres chain was done by LDWF personnel on September 16th. All islands within the chain experienced significant beach (gulf side) erosion,
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DRAFT overwashing, and scouring across the islands and some bayside erosion as well. The tide was low (approximately 0.8 NAVD 88) during the flight so high water levels did not exacerbate the appearance of loss and may have actually have done the reverse to some extent. Raccoon Island did not appear to have much additional damage to the western spit that was severely impacted for hurricane Gustav and the “footprint” still appeared intact. Much of the spit was under water, or very nearly so, but it was evident that it remains very shallow and may very well be “reworked” in future months. Most of the small vegetated portion on the spit just west of breakwater 15 remained above water. The vegetated portion of the island behind the bws appears to be severely damaged and scouring was apparent. Much of the sand that remained in the bw field after Gustav appeared to have been deposited on the island as well as directly behind it. Some of this reworked sand is now elevated above the existing water level and may offset some of the losses (see arrow in photo below). Actual acreage losses will have to be calculated through GIS and photo analysis and USGS will undoubtedly be analyzing these areas in the near future. The bayside of the island appeared to suffer some erosion as well. Raccoon Island Pre-Gustav (LDWF), Post-Gustav (USGS) and Post Ike (LDWF)
April 2008
2008 Post-Gustav
Newly Deposited Sand
2008 Post-Ike
Whiskey Island spits were primarily underwater but appeared to have retained their footprint post Gustav but the breech that formed on the eastern spit after Gustav appears to have substantially deepened and widened post Ike and may be permanent. The gulf side beech was severely scoured. Vegetated portions of the island appeared to have received some damage and there was some bayside erosion as well. 12
DRAFT IDBI Refuge – Whiskey Island East Spit Pre-Gustav and Post Ike
May 2007
2008 Post-Ike
Trinity/East Island lost both spits during Gustav. The western spit appeared to possibly be lost or damaged beyond natural repair processes as it appeared the old spit area was much deeper and the wave energy was very high. The bayside received some additional marsh loss from Ike. The gulf-side received heavy beach erosion and over washing. Much of the material pumped for the New Cut CWPPRA project constructed in 2007 did appear to have been overwashed and scoured and some of the material deposited on the bayside beach and shallow flats.
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DRAFT IDBI Refuge - Trinity Island (Top-LDWF, Middle-USGS, Bottom-LDWF)
May 2007 May 2007
2008 Post-Gustav
2008 Post-Ike
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DRAFT IDBI Refuge - Trinity Island at California Canal (LDWF)
May 2007
2008 Post-Ike
Wine Island appeared to have taken the brunt of destruction within the Isles Dernieres chain for Gustav and was severely scoured and overwashed once again for Ike. The island appears to be severely degraded with much loss in elevation and vegetation. There was obviously more material within the rock dike that was removed due to scouring from Ike.
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DRAFT IDBI Refuge - Wine Island (LDWF)
May 2007
2008 Post-Ike
Wildlife Impacts: Very few pelicans or other birds were seen during the flight within Isles Denieres. We did observe several hundred pelicans on Atchafalaya Delta WMA and received reports of pelicans dispersed throughout the coast. Few flightless birds remained in the area prior to Ike’s landfall and this may have prevented large numbers of fatalities but many birds probably perished nonetheless.
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DRAFT Atchafalaya Delta WMA: Buildings: Minimal damage to the headquarters facility was observed during a post-Ike assessment. The minor damage that occurred resulted from the tidal surge that dispersed approximately five to six feet of water over the area. As a result of the flooding, the lower level storage rooms had approximately three feet of water in them. The interior of the living quarters had some moisture on the floor in the laundry room. However, no water damage occurred to the living quarters. Also, no wind damage was documented.
Campground Restrooms – flooded by storm surge – needs to be pumped out Boat Shed – no damage Airboat Shed – no damage Generator Shed – no damage Living Quarters – no damage Pump Shed – no damage Tool Shed –no damage Berwick Office – flooded with approximately four feet of water
Photos of the Atchafalaya Delta Headquarters Facility Post-Ike
Equipment: Atchafalaya Delta’s Ford 5610 tractor was inundated with flood water. It will need to be replaced due to flood water and other mechanical problems. Marsh: Marsh impacts were significant and were primarily from salt burn and scour from tidal surge. A majority of the damage was to emergent freshwater plants and submerged aquatic vegetation due to salinity levels exceeding 23 ppt (see graph). Habitat conditions closely resemble damage that resulted from Hurricane Rita (see photos). The marsh impact may take a few growing seasons to recover to pre-Ike conditions. The islands of the Main Delta sustained minimal damage as a result of Ike. Some of the willow trees were toppled or missing leaves/branches. In general, damage was sparse and should not affect deer and small game hunting this fall/winter.
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DRAFT Graph of Salinity and Water Level at Main Delta
Water Level (feet)
Log Island Pass (Hurricane Ike)
Salinity (ppt)
25 20 15 10 5 0 9/11/08
9/12/08
9/13/08
9/14/08
9/15/08
Time
Photos of Post-Ike Habitat Conditions at Atchafalaya Delta
Wildlife Impacts: Some impacts were observed. Deceased fish and wildlife were documented during the assessment. However, no long term impacts are expected.
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DRAFT Deceased Wildlife at Atchafalaya Delta
Marsh Island Refuge: Buildings: A post-Hurricane Ike survey revealed that the Marsh Island Refuge headquarters facility suffered extensive damage to structural components (lower level doors, windows, walls, flooring, etc.). All of the damage resulted from the tidal surge that dispersed approximately six to seven feet of water over the island. As a result of the flooding, the boat sheds and lower level storage rooms had approximately four to six feet of water. The interior of the living quarters and the elevated tool shed had moisture on the floors and a thin film of residual sediment. No wind damage was documented. Additionally, the waste water treatment system, water softener, and central air conditioner units were destroyed as a result of the storm. The storm surge also deposited a 1-3 inch layer of sediment/organic material in all flooded structures of the headquarters facility and deposited wrack and debris at the facility.
Boat Shed – major structural damage to walls, floors, etc. (see photo below) Airboat Shed – major structural damage (see photo below) Generator Shed – lower level storage area damaged Living Quarters – lower level storage area damaged and plumbing/electrical damaged Pump Shed – water well plumbing damaged Tool Shed –no damage
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DRAFT Photos of Damage at Marsh Island Headquarters
Equipment: No damage Marsh: The full extent of damage to marsh is unknown at this time. A quick assessment of the island revealed that minor erosion/scour occurred as a result of the storm. However, the tidal surge probably impacted a majority of the submerged aquatic vegetation. Preliminary data indicates that salinity levels exceeded 20 ppt. Minimal impacts to emergent marsh are expected since the area is mostly made up of intermediate/brackish vegetation. Accelerated shoreline loss did occur on the south and southeast sides of the island due to wave damage. The gulf shore sustained substantial erosion and over-wash of sand into the interior marsh (see below photo). Also, numerous trees (honey locust, hackberry, etc.) along the gulf shore were toppled and/or sustained mechanical damage as a result of the surge. These trees serve as resting areas for neotropical birds that migrate annually across the Gulf of Mexico. These habitat changes should have minimal long term impacts to resident and migrant species of birds that utilize the affected marshlands. Photos of Southwest Shoreline of Marsh Island
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DRAFT Management Features: In June, Coastal Operations staff initiated the process of repairing breaches in a few of the water management units on Marsh Island. The breaches were plugged with sediment to restore the units to a functional state. However, the high water conditions that resulted from Ike and Gustav washed out some of the plugs. More sediment will need to be added to the plugs to function effectively. Wildlife Damages: Some wildlife (nutria, birds, etc.) perished as a result of the storm. However, impacts are believed to be minor. Photos of Deceased Wildlife at Marsh Island
State Wildlife Refuge: A post-Hurricane Ike survey showed that the State Wildlife Refuge headquarters facility suffered only minor damage to buildings at the facility. All of the damage resulted from the tidal surge that dispersed approximately six to seven feet of water over the island. No wind damage was documented. The waste water treatment system was damaged and most of the plumbing and electrical needs to be repaired. The storm surge also deposited approximately 3-6 inches sediment/organic material on the grounds of the headquarters. Buildings: Small Boat Shed – additional roof damage (see photo) Trappers Camp – damaged to plumbing and electrical Big Boat Shed – minor damage to pilings and walkways (barge rubbed/bumped against building Old Camp – no damage
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DRAFT Photograph of the Headquarters Facility Post-Ike
Equipment: No damage Marsh: The full extent of damage to marsh is unknown at this time. However, a quick assessment of the island revealed that little (if any) erosion or scour occurred as a result of the storm. Preliminary data indicates that salinity levels did not exceed 15 ppt. Thus, minimal impacts to emergent marsh are expected since the area is mostly made up of intermediate/brackish vegetation (see graph). Graph of Salinity Levels at State Wildlife Refuge (LDWF Fur and Marsh Mgmt.) Tom Bayou Salinity Levels for Hurricane Ike (ppt) 14 12 10 8 6 4 2 0
9/10/08
9/11/08
9/12/08
9/13/08
9/14/08
9/15/08
Time
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DRAFT Management Features: A complete assessment has not been conducted at this time. However, the weirs inspected had only minor damage at the time of the assessment. Wildlife Impacts: No deceased wildlife observed. Overall, impacts to wildlife are expected to be minor.
ROCKEFELLER REFUGE Comments: Rockefeller Refuge is located in SW Louisiana in Cameron and Vermilion parishes. Its coastal location and low elevation make it prone to inundation and many protection levees remain damaged from Hurricane Rita which hit in September 2005. Cameron parish roads located several miles inland from the coast were already overtopped by high tidewater by mid-day Friday, hours before the hurricane made landfall. Mandatory evacuation orders were in place as per advisories by local officials. Much of our heavy equipment and boats had been evacuated in advance of Hurricane Gustav which hit Louisiana near Cocodrie on September 1. We again evacuated equipment, boats, vehicles, etc and secured the office, computers, etc. prior to Hurricane Ike making landfall. The refuge was closed to public use once the parish was under mandatory evacuation orders. On Saturday September 13, several Rockefeller employees assisted the National Guard and Enforcement Division with search and rescue operations in Hackberry, Louisiana. Numerous citizens had planned to evacuate later and were stranded due to rapidly rising water or had elected not to evacuate, but later were in need of rescue. The storm surge was estimated to be approximately 8 feet at Rockefeller’s Headquarters and office facilities. Preliminary reports of damages observed are as follows: Buildings: Fortunately the storm surge was not high enough to cause water to enter the elevated structures including the office, General Quarters, or residences. Structural damage did occur to the buildings in terms of loss of electricity, loss of water availability, damage to air conditioning units and compressors, and electrical breakers were adversely affected, etc. Wooden staircases were heavily damaged and partially washed away. The outdoor weather monitoring equipment was lost. The four newly rebuilt metal buildings (shop, lumber shed, boat shed, and tractor shed) sustained some damage, most extensively to the shop. The storm surge ripped away much of the lower levels of the exterior and caused heavy damage to the south doors/portal. The ice machine was lost and the break room was severely damaged; a full inventory of lost/damaged equipment is underway. Outside safety handrails were torn off. The other metal buildings sustained some damage but to a lesser extent. Most of the equipment had been moved north in advance of the storm. The new generator was protected from damage due to its elevated location.
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The portable buildings (temporary lab and two equipment buildings – one for fisheries research equipment and one for alligator research equipment) were completely washed away, as were three alligator egg incubators fabricated by staff. Two recently acquired trailers to provide additional housing for students were extensively damaged; one far worse than the other but neither is likely salvageable. Water and mud damaged the remaining structures/contents and mold had developed within days. Steps and porches constructed by the shop crew were washed away. The older alligator holding tanks/facilities were damaged with loss of lids and hinges; the awning/cover appeared to have weathered the storm with little if any damage.
Photograph of the Rockefeller Headquarters Facility Post-Ike
Equipment: Some equipment was displaced by storm surge and damage evaluation due to collisions and saltwater exposure are pending. Management Features: Limited information is available, but many levees were already in substandard condition due to extensive damage from Hurricane Rita in 2005. Continued wave action with high tides and subsidence has reduced the effectiveness of some levees; in some areas they are eroded nearly to marsh level. Preliminary reports suggest some gravel roads may have experienced some level of washouts. As of this writing on September 25, Price Lake Road remains partially under water and vehicular traffic can not access beyond the water control structure/tower site. There may damage to the boat launch at East End and reports on the precise condition of the road there and at Unit 14 are unknown; and may not have been damaged but the exact condition remains to be established. Wildlife and Marsh Impacts: Limited if any loss of wildlife was noted in preliminary surveys. Numerous alligators and turtles were seen and alligators appeared in good condition; some were undoubtedly pushed north by high water. High concentrations of teal evident before the storm were notably absent. No major fish kills were noted; minor losses were observed. Vegetative damage to plant communities may be evident over time but preliminary salinity
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measurements were not excessively high. Loss of submerged aquatic vegetation and desirable waterfowl food plants is likely. Salinities (ppt) measured on September 18 were as follows: 19.7 Headquarters Canal 17.7 ponded water south of office 18.8 on Hwy 82 west of North Island road 18.4 south side at North Island road 12.3 ditch just west of Superior Canal 14.1 one mile east of Superior Bridge 15.8 bridge approximately four miles east of Superior 13.3 bridge at Lake 14 off Hwy 82 10.7 Rollover landing 8.4 Acadiana Marina south 8.7 Acadiana Marina north
Photograph of Deceased Alligator at Rockefeller Refuge
Present Status: As of September 25, Cameron Parish remains under a mandatory evacuation order with only “look and leave” access. LDWF employees stationed at Rockefeller are all displaced yet have worked diligently despite personal losses to homes and property to assist with on-site recovery. Numerous water control structures have been opened and stop logs removed to facilitate drainage of high salinity floodwaters. Efforts are underway to expedite reinstatement of electricity and check for safety of all electrical lines/sources, repair of water lines and sewerage treatment plant, etc. such that normal operations may resume as quickly as possible.
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All of Coastal and Nongame Resources Division’s WMAs and refuges experienced some impacts from Ike in the form of flooding and/or high winds. As anticipated, areas in the southwest, closer to hurricane landfall experienced more damage than those areas to the east of landfall impact however flooding was widespread throughout the southeast as well. From September 14-18, personnel from Coastal Operations assessed hurricane damage to Coastal Operations’ properties both from the ground and air. Aerial surveys via helicopter were flown on September 16th and via seaplane on September 17th. This report is preliminary and primarily based on initial assessments, limited weather data and limited access to some areas. A more detailed report will be compiled once in depth field investigations have been made.
SOUTHEAST COASTAL OPERATIONS’ AREAS Pointe aux Chenes WMA: Comments: Hurricane Ike had one of the largest tidal surges ever recorded at this WMA. The tidal surge experienced at Pointe aux Chenes WMA was approximately similar to that of Hurricane Rita. Hurricane Ike submerged the ring levee at the headquarters and inundated all buildings with approximately 6’ of water. Between the two storms, Pointe aux Chenes WMA was significantly damaged. The strong winds of Gustav did severe damage to buildings, marsh, and management features while the tidal surge of Ike inundated the same features which caused additional damage. Buildings: Residence – Lower level inundated with 6’ of water damaging wiring, insulation, and contents. Boat Shed on St. Louis Canal - Inundated with 8’ of water resulting in dock damage. Pump Shed - Inundated with 6’ of water damaging wiring and insulation. Fuel Dock - Inundated with 6’ of water – no additional major damage. Storage Shed/Dog Pen - Inundated with 6’ of water damaging wiring and insulation.
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Storage Shed/Playhouse - Inundated with 2’ of water. Moon Room – No additional damage; building was total loss from Gustav. Quonset Hut – No additional damage; building was a total loss from Gustav. Boat Storage Shed - Inundated with 6’ of water damaging wiring and contents. Bunkhouse – Lower level inundated with 6’ of water damaging wiring, water heater, and contents. Tractor Shed at Farm – No additional damage. Bridge to headquarters damaged – Appears to have been lifted 3” on south side.
Pointe aux Chenes Headquarters and Point Farm
Equipment: 8” electrical water pump inundated – will have to be repaired/replaced. Tractor harrow inundated and will have to be repaired. 12” PTO water pump inundated and will have to be repaired. 10’ bush hog inundated and will have to be repaired. 5 ton central A/C inundated and will have to be replaced. Marsh: The marsh was inundated with high salinity waters in excess of 9’ in depth. This surge eroded several acres of marsh by rolling it over on top of adjacent marsh. Several small islands of marsh that existed pre Ike were completely removed. The high salinity content burned the fresher marsh communities found in the Montegut and Pointe aux Chenes Units. Submerged aquatics were also significantly impacted. Before Gustav and Ike hit Pointe aux Chenes WMA, submerged aquatic vegetation (SAV) dominated by widgeon grass was abundant and dense in all management units. The SAVs were also found in good abundance in several locations outside the management units. Gustav and Ike devastated most of the SAV removing up to 70% from the WMA and nearly 100% from the larger bodies of water. What SAV still exists has been found balled up in the fragmented marsh of the management units. The storm surge overtopped the small ring levee on the farm and the cross levee located behind the tractor shed sending high salinity waters into the bottomland hardwood mitigation plantings on the farm. In excess of 800 acres of mitigation tree plantings were flooded with high salinity waters for nearly a week as well as mechanically stressed these trees from high storm winds.
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DRAFT These impacts are expected to stress many of the trees as this was the second such flooding in less than a month. Impacts to the mitigation plantings will not be known until Spring 2009. The most obvious impact is that the marsh and ridges appear to be bare. The marsh is laid flat and the woody vegetation has been stripped of leaves and many branches. Management Features: Grand Bayou Unit o Levee system scoured. o The five breaches created by Gustav were further eroded by Ike. o The limestone on the Grand Bayou gates has been washed away. o Severe scouring was increased on the water control structure on St. Louis Canal. Montegut Unit o Levee system scoured. o Breech in southern levee increased in size. o Severe damage to the older and larger water control gate. The walkway has been removed and the entire structure is leaning. Montegut Levee Breach
PAC/DU Unit o Levee system scoured. o Island Rd Shoulder removed. o Island Rd Structure severely damaged and west wing wall swings with tide and the I beam is torn in half; east wall is detached from the gates. o S2 structure has severe scouring on both wing walls and most of rock has been removed o S3 structure is in tact but much of the rock has been removed and top of culverts is scoured. Handicap waterfowl blinds received severe damage and are unusable. Island Rd. Boat Launch o Parking lot severely scoured and several tons of limestone have been removed. Grand Bayou Boat Launch 6
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o 1 dock missing on St. Louis Canal Launch side. o 2 of 3 street lights leaning, 1 light is out. o Additional scouring of limestone occurred. o Debris was deposited on bridge and parking lot. Boundary signs – additional signs removed. Campground – Picnic tables missing.
Wildlife Damages: The large flooding event pushed many animals off the WMA and others perished. Soon after the storm, concentrations of animals such as raccoons and nutria were found gathered on features that were elevated out of the water like oil and gas infrastructures and trees. Other wildlife were found concentrated in small towns such as small herds of deer observed in Montegut, and Chauvin. Some mortality was observed such as with nutria and isolated fish kills.
Salvador WMA: Comments: The tidal surge experienced at this WMA was higher than what was experienced during hurricanes Katrina, Rita, or Gustav. The surge was 6 to 12” higher than Rita and inundated all buildings at the headquarters, except for the supervisor’s residence that is significantly elevated. The workshop below this residence did flood. The water level at the headquarters was approximately 4’ high on the lawn. The floodwaters also overtopped Hwy 90 at the Pier 90 boat launch east of Boutte. This storm was not a significant wind event at this WMA. Buildings: Main Headquarters – Porch inundated with water and all sides of the building went underwater damaging insulation and possibly wiring, 5 ton central A/C damaged. Elevated Headquarters – Lower level inundated by 4’of water damaging water heater, wiring and contents of lower level. Boat Shed – Inundated by 5’ of water damaging wiring and docks. Generator Shed – Inundated by 4’ of water damaging wiring, panels, and generator hookups. Tool Shed – Inundated by 4’of water damaging wiring, insulation, and front steps. Airboat shed – No additional damage. Gazebo – Inundated by 4’ of water damaging wiring and flooring. Tractor Shed – No additional damage. Pier 90 shed – inundated by 2’ of water damaging contents.
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DRAFT Salvador WMA Headquarters
Equipment: 2550 Kubota Tractor with front-end loader – Inundated - Will have to be replaced. 15 KW Gas generator – Inundated – Will have to be replaced. 10 KW Diesel generator – Inundated – Will have to be replaced. 60”Gravely lawn mower – Partially inundated – will have to be repaired/replaced. 60” PTO grooming mower – Inundated – Will have to be replaced. 5hp self-propelled mover – Inundated – Will have to be replaced. Stihl weed-eater – Inundated – Will have to be replaced. 1 set of tools – Inundated – Will have to be replaced. Marsh: The entire WMA was inundated with a high salinity storm surge. The high waters lasted for approximately five days and only the northern ridges were higher than the water level. Salinity observations were taken the day after the storm and were noticeably higher than normal but not significantly high enough do extensive damage to the marsh. All sample observations were less than 4ppt. However the combination of wind damages from Gustav and high water levels from both Gustav and Ike have knocked down most all of the herbaceous vegetation and have stripped much of the short woody vegetation of its leaves. The marsh is much like Pointe aux Chenes and appears to be bare and open. Submerged aquatic vegetation (SAV) was difficult to assess due to the high water levels at the time of this investigation. However evidence was found that suggests that some was lost but the majority remains intact. Many of the hyacinths were removed as result of the high tides, but they have not been eliminated. Management Features: Several boundary signs have been knocked down and are missing. Wildlife Damages: Many of the eagle nests on the WMA have been knocked down. This was believed to be a result of Hurricane Gustav, but they were not noticed missing until this assessment was conducted.
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DRAFT Deer are believed to have faired well for this storm. Many were believed to have been pushed off the WMA for a short time due to the high water levels, but some were observed on the area and are in good condition. No rabbits were observed and are believed to have been pushed off the WMA or have perished.
Pass a Loutre WMA: Comments: Hurricane Ike and its storm surge were relatively insignificant at this WMA. There is no evidence to suggest that water levels were any higher than an unusually high tide. There were tracks in the mud at the headquarters that were left two days before the storm that were in tack and not weathered two days after the storm. Buildings: No observed damages. Equipment: No observed damages. Marsh: Additional salt scalding was observed on the delta duck potato and other emergent vegetation. It is believed that Ike pushed in higher salinity water that is having an adverse impact on the duck potato, cattail, three corner grass and other emergent freshwater vegetation including the submerged aquatics (SAV). These impacts however, are not abnormal for this time of the year. During the months of September or October we generally observe salinity levels start to climb until January. It is also common to see the fresh water vegetation begin to decline in response to the increased salinity. The only obvious differences this year in the marsh compared to a normal year is the Roseau cane and trees that were pushed down as a result of Hurricane Gustav. Hurricane Gustav also pushed down many of the dead trees that were killed and still standing from Hurricane Katrina. SAV’s were adversely impacted from Gustav and Ike. Pondweed (Potomageton sp.) seems to have survived fairly well were milfoil, coontail, others did not. Most of the SAV except pondweed was removed as a result of both storms. Most of the hyacinth was removed from the WMA by both storms. Management Features: Freshwater Impoundment – Two levee breeches were observed after Hurricane Ike. Campgrounds – Significant damage has been observed at all campgrounds as a result of both storms. o Docks are damaged. o Self-clearing permit stations are damaged and fallen. o Picnic Tables are missing. o Debris is covering several campgrounds.
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Several boundary signs have been knocked down and are missing.
Wildlife Damages: None observed or expected as a result of Hurricane Ike.
Biloxi WMA: Comments: The combined storm surges of both Gustav and Ike have flattened the marsh vegetation of Biloxi WMA. These impacts are expected to be temporary and the area should recover in the spring. Much of the SAV has been removed from the WMA but limited amounts can still be found in the smaller ponds on the WMA. The good news about the WMA is that it appears to have more SAV than the surrounding marsh. Lake Boeuf WMA: Comments: High winds from Gustav downed several trees on this WMA. The high storm surges to the south of this WMA led to poor drainage around this WMA which resulted in high water levels on this WMA. The water levels were elevated for the entire first half of September but the impacts are not expected to be detrimental. Impacts to game resources are expected to be negligible on this area.
SOUTH-CENTRAL COASTAL OPERATIONS’ AREAS Marsh Island Refuge, State Wildlife Refuge, Isle Dernieres Barrier Island Refuge, and Atchafalaya Delta WMA sustained moderate to extensive damage from Hurricane Ike. The south-central portion of coastal Louisiana experienced a tidal surge of water to an elevation of approximately +4 feet near Isle Dernieres, +7 feet at Atchafalaya Delta, and +8 feet in Vermilion Bay (see above NOAA tidal surge graphs for more information). A majority of these areas were completely inundated by water. However, a few of the higher ridges, levees, spoil banks, etc. were not submerged during the storm event. For example, some of the islands with greater elevation (e.g., Big Island, HQ Island, etc.) of the Atchafalaya Delta WMA did not completely flood during the storm (see photo).
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DRAFT Example of Surge Height - Photo of Wrack on Campground at Main Delta
High Water Mark
Wind speed in the vicinity of these areas ranged from 10 to 40 miles per hour when Hurricane Ike made landfall on Louisiana’s coast. Maximum wind gusts were approximately 55-60 miles per hours (around 50 knots) according to NOAA’s meteorological observations (see below). Wind speed at Atchafalaya Delta Headquarters (source: NOAA NOS station)
Below is a brief description of damaged that was documented during a post-storm assessment of the buildings, equipment, management infrastructure, marsh, and wildlife at these areas. Overall, the areas sustained considerable damage as a result of Hurricane Ike. Isles Dernieres Barrier Islands Refuge: Comments: An aerial overview of the entire Isles Dernieres chain was done by LDWF personnel on September 16th. All islands within the chain experienced significant beach (gulf side) erosion,
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DRAFT overwashing, and scouring across the islands and some bayside erosion as well. The tide was low (approximately 0.8 NAVD 88) during the flight so high water levels did not exacerbate the appearance of loss and may have actually have done the reverse to some extent. Raccoon Island did not appear to have much additional damage to the western spit that was severely impacted for hurricane Gustav and the “footprint” still appeared intact. Much of the spit was under water, or very nearly so, but it was evident that it remains very shallow and may very well be “reworked” in future months. Most of the small vegetated portion on the spit just west of breakwater 15 remained above water. The vegetated portion of the island behind the bws appears to be severely damaged and scouring was apparent. Much of the sand that remained in the bw field after Gustav appeared to have been deposited on the island as well as directly behind it. Some of this reworked sand is now elevated above the existing water level and may offset some of the losses (see arrow in photo below). Actual acreage losses will have to be calculated through GIS and photo analysis and USGS will undoubtedly be analyzing these areas in the near future. The bayside of the island appeared to suffer some erosion as well. Raccoon Island Pre-Gustav (LDWF), Post-Gustav (USGS) and Post Ike (LDWF)
April 2008
2008 Post-Gustav
Newly Deposited Sand
2008 Post-Ike
Whiskey Island spits were primarily underwater but appeared to have retained their footprint post Gustav but the breech that formed on the eastern spit after Gustav appears to have substantially deepened and widened post Ike and may be permanent. The gulf side beech was severely scoured. Vegetated portions of the island appeared to have received some damage and there was some bayside erosion as well. 12
DRAFT IDBI Refuge – Whiskey Island East Spit Pre-Gustav and Post Ike
May 2007
2008 Post-Ike
Trinity/East Island lost both spits during Gustav. The western spit appeared to possibly be lost or damaged beyond natural repair processes as it appeared the old spit area was much deeper and the wave energy was very high. The bayside received some additional marsh loss from Ike. The gulf-side received heavy beach erosion and over washing. Much of the material pumped for the New Cut CWPPRA project constructed in 2007 did appear to have been overwashed and scoured and some of the material deposited on the bayside beach and shallow flats.
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DRAFT IDBI Refuge - Trinity Island (Top-LDWF, Middle-USGS, Bottom-LDWF)
May 2007 May 2007
2008 Post-Gustav
2008 Post-Ike
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DRAFT IDBI Refuge - Trinity Island at California Canal (LDWF)
May 2007
2008 Post-Ike
Wine Island appeared to have taken the brunt of destruction within the Isles Dernieres chain for Gustav and was severely scoured and overwashed once again for Ike. The island appears to be severely degraded with much loss in elevation and vegetation. There was obviously more material within the rock dike that was removed due to scouring from Ike.
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DRAFT IDBI Refuge - Wine Island (LDWF)
May 2007
2008 Post-Ike
Wildlife Impacts: Very few pelicans or other birds were seen during the flight within Isles Denieres. We did observe several hundred pelicans on Atchafalaya Delta WMA and received reports of pelicans dispersed throughout the coast. Few flightless birds remained in the area prior to Ike’s landfall and this may have prevented large numbers of fatalities but many birds probably perished nonetheless.
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DRAFT Atchafalaya Delta WMA: Buildings: Minimal damage to the headquarters facility was observed during a post-Ike assessment. The minor damage that occurred resulted from the tidal surge that dispersed approximately five to six feet of water over the area. As a result of the flooding, the lower level storage rooms had approximately three feet of water in them. The interior of the living quarters had some moisture on the floor in the laundry room. However, no water damage occurred to the living quarters. Also, no wind damage was documented.
Campground Restrooms – flooded by storm surge – needs to be pumped out Boat Shed – no damage Airboat Shed – no damage Generator Shed – no damage Living Quarters – no damage Pump Shed – no damage Tool Shed –no damage Berwick Office – flooded with approximately four feet of water
Photos of the Atchafalaya Delta Headquarters Facility Post-Ike
Equipment: Atchafalaya Delta’s Ford 5610 tractor was inundated with flood water. It will need to be replaced due to flood water and other mechanical problems. Marsh: Marsh impacts were significant and were primarily from salt burn and scour from tidal surge. A majority of the damage was to emergent freshwater plants and submerged aquatic vegetation due to salinity levels exceeding 23 ppt (see graph). Habitat conditions closely resemble damage that resulted from Hurricane Rita (see photos). The marsh impact may take a few growing seasons to recover to pre-Ike conditions. The islands of the Main Delta sustained minimal damage as a result of Ike. Some of the willow trees were toppled or missing leaves/branches. In general, damage was sparse and should not affect deer and small game hunting this fall/winter.
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DRAFT Graph of Salinity and Water Level at Main Delta
Water Level (feet)
Log Island Pass (Hurricane Ike)
Salinity (ppt)
25 20 15 10 5 0 9/11/08
9/12/08
9/13/08
9/14/08
9/15/08
Time
Photos of Post-Ike Habitat Conditions at Atchafalaya Delta
Wildlife Impacts: Some impacts were observed. Deceased fish and wildlife were documented during the assessment. However, no long term impacts are expected.
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DRAFT Deceased Wildlife at Atchafalaya Delta
Marsh Island Refuge: Buildings: A post-Hurricane Ike survey revealed that the Marsh Island Refuge headquarters facility suffered extensive damage to structural components (lower level doors, windows, walls, flooring, etc.). All of the damage resulted from the tidal surge that dispersed approximately six to seven feet of water over the island. As a result of the flooding, the boat sheds and lower level storage rooms had approximately four to six feet of water. The interior of the living quarters and the elevated tool shed had moisture on the floors and a thin film of residual sediment. No wind damage was documented. Additionally, the waste water treatment system, water softener, and central air conditioner units were destroyed as a result of the storm. The storm surge also deposited a 1-3 inch layer of sediment/organic material in all flooded structures of the headquarters facility and deposited wrack and debris at the facility.
Boat Shed – major structural damage to walls, floors, etc. (see photo below) Airboat Shed – major structural damage (see photo below) Generator Shed – lower level storage area damaged Living Quarters – lower level storage area damaged and plumbing/electrical damaged Pump Shed – water well plumbing damaged Tool Shed –no damage
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DRAFT Photos of Damage at Marsh Island Headquarters
Equipment: No damage Marsh: The full extent of damage to marsh is unknown at this time. A quick assessment of the island revealed that minor erosion/scour occurred as a result of the storm. However, the tidal surge probably impacted a majority of the submerged aquatic vegetation. Preliminary data indicates that salinity levels exceeded 20 ppt. Minimal impacts to emergent marsh are expected since the area is mostly made up of intermediate/brackish vegetation. Accelerated shoreline loss did occur on the south and southeast sides of the island due to wave damage. The gulf shore sustained substantial erosion and over-wash of sand into the interior marsh (see below photo). Also, numerous trees (honey locust, hackberry, etc.) along the gulf shore were toppled and/or sustained mechanical damage as a result of the surge. These trees serve as resting areas for neotropical birds that migrate annually across the Gulf of Mexico. These habitat changes should have minimal long term impacts to resident and migrant species of birds that utilize the affected marshlands. Photos of Southwest Shoreline of Marsh Island
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DRAFT Management Features: In June, Coastal Operations staff initiated the process of repairing breaches in a few of the water management units on Marsh Island. The breaches were plugged with sediment to restore the units to a functional state. However, the high water conditions that resulted from Ike and Gustav washed out some of the plugs. More sediment will need to be added to the plugs to function effectively. Wildlife Damages: Some wildlife (nutria, birds, etc.) perished as a result of the storm. However, impacts are believed to be minor. Photos of Deceased Wildlife at Marsh Island
State Wildlife Refuge: A post-Hurricane Ike survey showed that the State Wildlife Refuge headquarters facility suffered only minor damage to buildings at the facility. All of the damage resulted from the tidal surge that dispersed approximately six to seven feet of water over the island. No wind damage was documented. The waste water treatment system was damaged and most of the plumbing and electrical needs to be repaired. The storm surge also deposited approximately 3-6 inches sediment/organic material on the grounds of the headquarters. Buildings: Small Boat Shed – additional roof damage (see photo) Trappers Camp – damaged to plumbing and electrical Big Boat Shed – minor damage to pilings and walkways (barge rubbed/bumped against building Old Camp – no damage
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DRAFT Photograph of the Headquarters Facility Post-Ike
Equipment: No damage Marsh: The full extent of damage to marsh is unknown at this time. However, a quick assessment of the island revealed that little (if any) erosion or scour occurred as a result of the storm. Preliminary data indicates that salinity levels did not exceed 15 ppt. Thus, minimal impacts to emergent marsh are expected since the area is mostly made up of intermediate/brackish vegetation (see graph). Graph of Salinity Levels at State Wildlife Refuge (LDWF Fur and Marsh Mgmt.) Tom Bayou Salinity Levels for Hurricane Ike (ppt) 14 12 10 8 6 4 2 0
9/10/08
9/11/08
9/12/08
9/13/08
9/14/08
9/15/08
Time
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DRAFT Management Features: A complete assessment has not been conducted at this time. However, the weirs inspected had only minor damage at the time of the assessment. Wildlife Impacts: No deceased wildlife observed. Overall, impacts to wildlife are expected to be minor.
ROCKEFELLER REFUGE Comments: Rockefeller Refuge is located in SW Louisiana in Cameron and Vermilion parishes. Its coastal location and low elevation make it prone to inundation and many protection levees remain damaged from Hurricane Rita which hit in September 2005. Cameron parish roads located several miles inland from the coast were already overtopped by high tidewater by mid-day Friday, hours before the hurricane made landfall. Mandatory evacuation orders were in place as per advisories by local officials. Much of our heavy equipment and boats had been evacuated in advance of Hurricane Gustav which hit Louisiana near Cocodrie on September 1. We again evacuated equipment, boats, vehicles, etc and secured the office, computers, etc. prior to Hurricane Ike making landfall. The refuge was closed to public use once the parish was under mandatory evacuation orders. On Saturday September 13, several Rockefeller employees assisted the National Guard and Enforcement Division with search and rescue operations in Hackberry, Louisiana. Numerous citizens had planned to evacuate later and were stranded due to rapidly rising water or had elected not to evacuate, but later were in need of rescue. The storm surge was estimated to be approximately 8 feet at Rockefeller’s Headquarters and office facilities. Preliminary reports of damages observed are as follows: Buildings: Fortunately the storm surge was not high enough to cause water to enter the elevated structures including the office, General Quarters, or residences. Structural damage did occur to the buildings in terms of loss of electricity, loss of water availability, damage to air conditioning units and compressors, and electrical breakers were adversely affected, etc. Wooden staircases were heavily damaged and partially washed away. The outdoor weather monitoring equipment was lost. The four newly rebuilt metal buildings (shop, lumber shed, boat shed, and tractor shed) sustained some damage, most extensively to the shop. The storm surge ripped away much of the lower levels of the exterior and caused heavy damage to the south doors/portal. The ice machine was lost and the break room was severely damaged; a full inventory of lost/damaged equipment is underway. Outside safety handrails were torn off. The other metal buildings sustained some damage but to a lesser extent. Most of the equipment had been moved north in advance of the storm. The new generator was protected from damage due to its elevated location.
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DRAFT
The portable buildings (temporary lab and two equipment buildings – one for fisheries research equipment and one for alligator research equipment) were completely washed away, as were three alligator egg incubators fabricated by staff. Two recently acquired trailers to provide additional housing for students were extensively damaged; one far worse than the other but neither is likely salvageable. Water and mud damaged the remaining structures/contents and mold had developed within days. Steps and porches constructed by the shop crew were washed away. The older alligator holding tanks/facilities were damaged with loss of lids and hinges; the awning/cover appeared to have weathered the storm with little if any damage.
Photograph of the Rockefeller Headquarters Facility Post-Ike
Equipment: Some equipment was displaced by storm surge and damage evaluation due to collisions and saltwater exposure are pending. Management Features: Limited information is available, but many levees were already in substandard condition due to extensive damage from Hurricane Rita in 2005. Continued wave action with high tides and subsidence has reduced the effectiveness of some levees; in some areas they are eroded nearly to marsh level. Preliminary reports suggest some gravel roads may have experienced some level of washouts. As of this writing on September 25, Price Lake Road remains partially under water and vehicular traffic can not access beyond the water control structure/tower site. There may damage to the boat launch at East End and reports on the precise condition of the road there and at Unit 14 are unknown; and may not have been damaged but the exact condition remains to be established. Wildlife and Marsh Impacts: Limited if any loss of wildlife was noted in preliminary surveys. Numerous alligators and turtles were seen and alligators appeared in good condition; some were undoubtedly pushed north by high water. High concentrations of teal evident before the storm were notably absent. No major fish kills were noted; minor losses were observed. Vegetative damage to plant communities may be evident over time but preliminary salinity
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DRAFT
measurements were not excessively high. Loss of submerged aquatic vegetation and desirable waterfowl food plants is likely. Salinities (ppt) measured on September 18 were as follows: 19.7 Headquarters Canal 17.7 ponded water south of office 18.8 on Hwy 82 west of North Island road 18.4 south side at North Island road 12.3 ditch just west of Superior Canal 14.1 one mile east of Superior Bridge 15.8 bridge approximately four miles east of Superior 13.3 bridge at Lake 14 off Hwy 82 10.7 Rollover landing 8.4 Acadiana Marina south 8.7 Acadiana Marina north
Photograph of Deceased Alligator at Rockefeller Refuge
Present Status: As of September 25, Cameron Parish remains under a mandatory evacuation order with only “look and leave” access. LDWF employees stationed at Rockefeller are all displaced yet have worked diligently despite personal losses to homes and property to assist with on-site recovery. Numerous water control structures have been opened and stop logs removed to facilitate drainage of high salinity floodwaters. Efforts are underway to expedite reinstatement of electricity and check for safety of all electrical lines/sources, repair of water lines and sewerage treatment plant, etc. such that normal operations may resume as quickly as possible.
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