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3 State of the Practice Survey
Pages 19-33

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From page 19...
... Overview of Construction Stormwater Management Programs The survey results indicate that construction stormwater management practices vary among state DOTs. Figure 4 shows that DOTs use three approaches for construction stormwater management.
From page 20...
... Construction stormwater management is a part of 60% the project management process Formal construction stormwater management 26% program, separate from project management Both options above are used depending on project 14% scope and size 0 10 20 30 Number of DOT responses Figure 4.   Construction stormwater programs managed by state DOTs (N 5 42)
From page 21...
... have managed their construction stormwater management programs through materials divisions. Figure 6 summarizes the approaches to construction stormwater management state DOTs regularly use for highway projects.
From page 22...
... In addition, one other DOT stated that their approach to construction storm water management is based on the size of the contributing area. The survey respondents were asked to select all the construction stormwater management control measures approved by their DOTs for use in highway construction projects, as each respondent could choose more than one selection.
From page 23...
... • Mulching such as grass, hay, wood chips, wood fibers, or straw (39 of 42 DOTs, 93%) More than 80% of the responding 42 state DOTs have approved the following construction stormwater management control measures for use in highway construction projects: • Dust control (38 of 42 DOTs, 90%)
From page 24...
... . From the "Other" responses, two state DOTs mentioned that an agronomist is responsible for preparing SWPPPs for their highway construction projects.
From page 25...
... • Violation remediation (40 of 41 DOTs, 98%) 7% Installation 100% 17% Violation remediation 98% 63% 7% Maintenance 95% 27% 17% Inspection deficiency remediation 88% 44% 46% Monitor and track control measures 80% 88% 54% Inspections 76% 85% 41% Consultants Reporting 63% 80% Contractors 29% Training project personnel 39% State DOTs 83% 37% Design guidance development 15% 88% 0 10 20 30 40 50 Number of DOT responses Figure 10.   Responsibilities of construction stormwater management (N 5 41)
From page 26...
... (one responding state DOT did not answer this question) indicated that they are responsible for the cost of installing stormwater control measures for highway construction 0-10% 36% 11-20% 12% 21-30% 10% 31-40% 5% 41-50% 5% More than 50% 12% Do not conduct 14% Not sure 7% 0 10 20 Number of DOT responses Figure 11.   Percentage of construction stormwater management inspections conducted by consultants (N 5 42)
From page 27...
... Of the responding state DOTs that selected "Other," one DOT mentioned that the cost of installing and maintaining control measures varies by project and is included as separate bid price items, a change order, or a percentage of the total contract bid. Another DOT emphasized that "there is a bid item for temporary erosion control, and the costs are included in the bidding process.
From page 28...
... Therefore, state DOTs were asked to select the qualification requirements for designers, inspectors, and installers; respondents were allowed to select all the qualifications that apply to each party. For designers, Figure 14 shows that 19 of 42 DOTs (45%)
From page 29...
... Less than a third of DOTs have used scientific research or rules of thumb and current practices to develop design standards for their construction stormwater management. In addition, two responding state DOTs selected "Other" for this question.
From page 30...
... The survey results also identify the frequency of updating state DOT guidelines for construc tion stormwater management. Figure 17 shows that, of 42 responding state DOTs, 20 (48%)
From page 31...
... • Internal software system (10 of 42 DOTs, 24%) Some responding state DOTs selected "Other." One DOT uses standardized inspection forms to track its construction stormwater management compliance.
From page 32...
... have used performance metrics to monitor their construction stormwater management requirements. The main performance metrics used by these four DOTs include the following: • Regular intervals for inspecting control measures and BMPs (4 of 4 DOTs, 100%)
From page 33...
... Our regulating agency typically audits our projects at about 12 per year." Two DOTs indicated that the regulatory agency determines the frequency of audits of construction stormwater management programs. Finally, survey respondents were asked whether their DOTs had been fined for non-compliance with construction stormwater management requirements.


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