Glendale (PDF) - Hazard Mitigation Web Portal - State of California

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Natural Hazards Mitigation PlanCity of Glendale, CaliforniaSection 8 – Floodssimilar and depends mainly on the duration of peak stream flow acting on the material (Lagasseand others, 1991).The State of California participates in the bridge scour inventory and evaluation program and astate-designated inspector must inspect all state, county, and city bridges every two years. Theinspections are rigorous, looking at everything from seismic capability to erosion and scour.The bridges in the city of Glendale are State, county, city, or privately owned. To date, wehave not found any records to indicate that the bridges in the Glendale area have beenevaluated. Nevertheless, since the Verdugo Wash is channelized in the city, the potential forbridge scour to occur along the Verdugo Wash is considered low to nil. The most significant,although unlikely concern regarding bridge scour is if unusually high surface water flows in theSycamore and Scholl Canyons were to reach the Glendale (2) Freeway, impacting the bridges atChase Drive and Glenoaks Boulevard. Privately owned bridges are not inspected, so thosebridges extending across unlined creeks could be at risk of failure due to scour.Storm Water Systems:As indicated above, drainage problems are known to occur sporadically in some specific areas ofGlendale. However, the City does not consider these drainage issues more than a nuisance, andhas pumping equipment to deal with flooding in these low spots when necessary.Inadequate maintenance can also contribute to the flood hazard in urban areas. As long as theCity conducts a regular inspection of culverts and storm drains to remove debris that mayobstruct the flow of water during storms, most areas should not be impacted by flooding.Water/Wastewater Treatment Facilities:The city of Glendale is a part of the Sanitation Districts of Los Angeles County. The SanitationDistricts are a confederation of independent special districts serving about 5 million people inLos Angeles County. There are no wastewater treatment facilities in Glendale.Water Quality:Environmental quality problems include bacteria, toxins, and pollution. “Out of sight, out ofmind” has traditionally been a common approach to dealing with trash, sediment, used motoroil, unused paint and thinner, and other hazardous substances that people dump into the seweror storm drains. What we often forget is that these substances eventually make their way intothe rivers and oceans, where they can sicken surfers and swimmers, and endanger wildlife. TheClean Water Act of 1972 originally established the National Pollutant Discharge EliminationSystem (NPDES) to control wastewater discharges from various industries and wastewatertreatment plants, known as “point sources.” Point sources are defined by the EPA as discreteconveyances such as pipes or direct discharges from businesses or public agencies. Then, in1987, the Water Quality Act amended the NPDES permit system to include “nonpoint source”pollution (NPS pollution). NPS pollution refers to the introduction of bacteria, sediment, oiland grease, heavy metals, pesticides, fertilizers and other chemicals into our rivers, bays andoceans from less defined sources. These pollutants are washed away from roadways, parkinglots, yards, and other areas by rain and dry-weather urban runoff, entering the storm drains,and ultimately the area’s streams, bays and ocean. NPS pollution is now thought to account formost water quality problems in the United States. Therefore, strict enforcement of thisprogram at the local level, with everybody doing his or her part to reduce NPS pollution, canmake a significant difference.The National Pollutant Discharge Elimination System (NPDES) permit program controlswater pollution by regulating point and nonpoint sources that discharge pollutants into watersof the United States. The City of Glendale is a member of the Los Angeles County StormwaterProgram. This program regulates and controls storm water and urban runoff into the LosAngeles River, San Gabriel River, Santa Clara River, tributaries to these rivers, and ultimately,2006 PAGE 8- 23
Natural Hazards Mitigation PlanCity of Glendale, CaliforniaSection 8 – Floodsthe Pacific Ocean. The Los Angeles County Stormwater Program is the local enforcer of theNPDES program. In the Glendale Area, NPDES permits are filed with the California RegionalWater Quality Control Board, Los Angeles Region. This permit was required by all countieswith a storm drain system that serves a population of 100,000 or more. On October 29, 1999,Phase II of NPDES was signed into law. Under this phase of NPDES, areas with 50,000 ormore residents, and construction sites one acre or more in size, must file for and obtain anNPDES permit. Under NPDES, the local regulator is responsible for the following controlmeasures:• Public education and outreach on storm water impacts,• Public involvement/participation,• Illicit discharge detection and elimination,• Construction of site storm water runoff control,• Post-construction storm water management in new development and redevelopment,and• Pollution prevention/good housekeeping for municipal operations.The NPDES permit area that includes Glendale is 3,100 square miles in area, with a populationof 11.4 million. In conformance with the Federal requirements listed above, one of the majortasks of the Los Angeles County Stormwater Program is to educate the local population aboutkeeping the water that flows into our rivers and ocean clean by eliminating discharges ofhazardous materials into storm drains and other point sources. Signs are typically painted bystorm drains that drain to the local rivers and ultimately into the Pacific Ocean to encouragepeople from not disposing motor oil or other potentially hazardous substances into the drains.Existing Flood Mitigation Activities:Flood mitigation activities listed here include current mitigation programs and activities thatare being implemented by the City of Glendale agencies or organizations.The City of Glendale uses building codes, zoning codes, and various planning strategies toaddress the goals which aim at restricting development in areas of known hazards, and applyingthe appropriate safeguards.Acquisition and Protection of Open Space in the Floodplain:Current efforts to increase public open space in the southern California area been paired withthe need to restore and preserve natural systems that provide wildlife habitat and help tomitigate flood events. Public parks and publicly owned open spaces can provide a bufferbetween flood hazards and private property.Water Districts:Many water districts in the region are in the process of replacing old cast iron pipes with moreductile iron pipes, which will be more resilient in disaster situations. Water districts in theregion are committed to working together during a disaster to provide water to the area’sresidents as soon as possible in the event that the water distribution system fails locally. Forexample, Glendale’s Department of Water and Power has built inter-ties with the MetropolitanWater District for emergency situations.Stormwater Systems:There are several surface water management providers in the county that manage water qualityand storm water runoff from new development. The primary one, and the one that providesflood control services for the city of Glendale is the Los Angeles County Department of PublicWorks.2006 PAGE 8- 24
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NOTES:This map is intended for gene
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HospitalsPartnershipsWithin City an
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Impact on CityMost significant area
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