Silver Creek - Division of Water Quality - Utah.gov
Silver Creek - Division of Water Quality - Utah.gov
Silver Creek - Division of Water Quality - Utah.gov
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Stream Reach<br />
Length<br />
(miles)<br />
<strong>Silver</strong> <strong>Creek</strong> <strong>Water</strong>shed TMDL Final Report<br />
Cadmium<br />
Annual Load<br />
(lbs)<br />
Cadmium Annual<br />
Load Reduction<br />
Needed (lbs)<br />
Proposed<br />
BMP<br />
Removal<br />
Efficiency<br />
Projected<br />
Cadmium<br />
Total<br />
Removal<br />
(lbs)<br />
Stream Reach<br />
Above Park City 2.6 17.6 15.8 80 - 100 % 14<br />
Park City to Richardson<br />
Flat 3.4 10.3 5.5 85 – 99% 8.7<br />
Richardson Flat to<br />
Above Atkinson 4.1 25.8 22.1 85 – 100% 21.9<br />
Above Atkinson to<br />
Atkinson 0.5 26.8 17.4 85 – 100% 22.8<br />
Atkinson to Wanship 7.5 12.3 1.0<br />
1. Removal estimates in this reach are based on upstream reductions already achieved.<br />
*The same BMPs will be used for Cadmium as will be used for Zinc.<br />
Costs<br />
The following item costs and assumptions were used for calculating costs <strong>of</strong> BMP<br />
implementation:<br />
*Excavation = $4/cu.yd.<br />
Excavation is to a depth <strong>of</strong> 4 feet and includes hauling<br />
materials to a maximum distance <strong>of</strong> 5 miles.<br />
**Topsoil = $15.50/cu.yd. Topsoil includes materials and spreading. All excavated<br />
areas will be topsoiled at a depth <strong>of</strong> 6” to 8”.<br />
*Lined Ditch = $50/ft.<br />
Ditch/stream liner will be concrete or clay.<br />
*36” Pipe Culvert = $60/ft Includes placement.<br />
*48” Pipe Culvert = $88/ft Includes placement.<br />
***Wetland Creation = $3/sq.ft. Includes earthwork and vegetation<br />
*<strong>Utah</strong> Department <strong>of</strong> Transportation - Statewide Standard Item Average Prices and Total Quantities 2002<br />
**Local Park City costs. For purposes <strong>of</strong> calculations, $15.50/cu.yd = $2.60/sq.yd @ 6” depth.<br />
***Brodie, 1993<br />
For purposes <strong>of</strong> cost estimating, it is assumed that <strong>Silver</strong> <strong>Creek</strong> will either be placed in a lined<br />
ditch or in a 48” pipe culvert. A 48” pipe should accommodate anticipated flows, storm events<br />
etc., can overflow into the irrigation system and be retained at the irrigation holding pond to the<br />
north.<br />
All contaminated soil will be excavated and removed to an approved repository (Richardson<br />
Flat). All disturbed areas shall be regraded and covered with 6 to 8 inches <strong>of</strong> topsoil.<br />
Costs are summarized by stream reach below and presented in Table 18. All costs are based on<br />
estimated area and length measurements taken from readily available maps.<br />
1.<br />
1.0 1.<br />
Table 18: Proposed BMPs, Efficiencies, and Costs<br />
Page 57
Change language