This manual should be used in conjunction with the wsdot highway runoff manual and the wsdot design manual, specifically section 1210. The results of this phase are presented in a two volume implementation manual and this document listing the suggested modifications to the wsdot design manual, highway hydraulic manual, quality standards for highway maintenance, and maintenance manual to reflect the results of the research and criteria development. Highway runoff manual washington state department of. Masters thesis, university of washington, seattle, wa, 2008. Ultimately, greenroads seeks to recognize and reward roadway projects that exceed public. This device was operated for one year, alongside an automatic sampler at. American association of state highway and transportation officials. Hydraulics highway runoff manual additional guidance. Hrm program manager wsdot po box 47329 olympia, wa 985047329 what happens when compliance with the hrm is not economically feasible, physically possible, or environmentally responsible. Scientific framework for stormwater monitoring by the washington. The highway runoff manual hrm provides guidance to direct the planning and design of stormwater management facilities for existing and. Introduction chapter 1 page 12 highway runoff manual m 3116. The highway runoff manual represents years of extensive research. Wsdot revised the hrm to maintain equivalency with the department of ecologys stormwater management manuals.
Highway runoff manual wsdot pdf free online publishing. A device has been developed to measure and to make a composite sample of stormwater runoff from highways. Highway runoff manual endangered species act stormwater design checklist for. The highway runoff manual hrm is the primary source of stormwater planning and design requirements for highway related work in the state of washington. Wsdot follows a standard lcca protocol when selecting pavement type for new facilities. For the latest covid19 health guidance, statistics and resources, visit coronavirus. The department of ecology reissued the permit, on april 5, 2019. The highway runoff manual shall be consistent with ecologys stormwater management manual and shall be adopted by wsdot only after obtaining ecologys approval. Section 35 of the 2019 hrm includes two pathways for wsdot address adjustments and deviations to the minimum requirements. If wsdot proposes to adopt a manual other than ecologys stormwater management manual as its highway runoff manual, wsdot shall formally consult with the tribes and local governments about the contents of the highway runoff manual. The construction engineer, roadway represents the state construction engineer by.
The 2019 highway runoff manual training workshop is for wsdot staff, local agencies, and consultants. The increase in sediment found in runoff on construction sites can be. Consult the washington state department of transportation wsdot 2008 highway runoff manual. Number of highway runoff emcs per epa rainfall zones from nsqd and hrdb. Wsdot maintenance staff responsible for developing roadside management plans and roadway maintenance practices. This manual is provided for our construction engineering personnel as. Full document pdf 475 kb a composite sampling device was developed that can be installed at less than ten percent of the cost of automatic sampling systems currently used in federal highway runoff studies.
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