Drainage_and_Flooding_Report-dated_03-10-08

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Mr. Ron Bottoms March 10, 2008 Page 12 of 15 Subdivisions with Repetitive Losses Locations k I o t z associates Tropical Storm AIlison and Tropical Storm Erin created major damage to the citizen of La Porte. Exhibit 5 shows the available information on structures and homes that were damage by flooding. Listed below are discussions of several subdivisions that contain repetitive loss properties. Brookglen Subdivision Brookglen Subdivision is located in the west areas of La Porte and the subdivision drains into Willow Springs Bayou HCFCD B 112-00-00. The homes and structures in Brookglen Subdivision were built to previous standards and appear to have the problem of no emergency overflow path. At the cud -de -sac of Gladwyne Drive, the only way for sheet flow to go is into an inlet. The homes and structures are high enough from the road but the water is just ponding. The elevated houses are acting like a levee and retaining the storm water on the street. An overflow path is needed for this area. Exhibit 1 I shows the repetitive losses and the home flooded by Tropical Storm Allison and Erin. HCFCD B 112-02-00 was interconnected to HCFCD B 109-03-00. Creekmont Subdivision Creekmont Subdivision is located off of Spencer Highway and drains into Big Island Slough (HCFCD B 106-00-00). Creekmont Subdivision has the problem of not enough inlets and no emergency overflow path. The homes along Heather Springs are noticeably higher then the street elevation and also adjacent to the bank of Big island Slough. The storm water has to enter the storm sewer of Creekmont Subdivision until it piles up to overtop bank at which water is already in home. An emergency overflow path is needed for this area. Exhibit 12 shows the repetitive losses and the home flooded by Tropical Storm Allison and Erin. Glen Meadows Subdivision Glen Meadows subdivision is located off of Spencer Highway and drainages into Big Island Slough (HCFCD B 106-00-00). The homes in Glen Meadows subdivision have the same problem of no emergency flow paths. The water piles in the streets until it goes into the storm sewer along Valley Brook or overtops the banks of Big Island Slough (HCFCD B 106-00-00). There are limited inlets in the subdivision as well. The homes are higher than the street elevation. The only flow path for the storm water to go is through the storm sewer. Exhibit 13 shows the repetitive losses and the home flooded by Tropical Storm Allison and Erin.