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ST9902-CS020327March 27, 2002 Sandy Lake Road ST 99-02 (A&B) Schematic Design - Review Comments GENERAL NOTES: 1. Many references are made to the "Top of Operating Nut". Need to distinguish between fire hydrants and water valves. Some of the water valves have extensions therefore the elevations from the nut should not be used for reference elevations. 2. Pullboxes and conduit may need to be included for future interconnected traffic signals. 3. All drives and cross streets should be properly identified, labeled, and shown on the plans. 4. Throughout the plans, recessed curb inlets are shown to encroach into the 5' sidewalk. 5. Locate and label all existing sanitary sewer manholes. 6. FYI - numerous franchise utilities have service lines throughout the extent of this project. These issues will need to be addressed at some point. 7. There is not a detail showing the tie-in to the existing concrete pavement at the east end of the project. 8. What design speed was used to design the project? It appears as if several speeds were used. SHEET5 1. The H.T. Ardinger, Jr. tract of land is now Amberpoint ~ Coppell L.L.C. 2. The Jose A. Esteve tract of land is now Amberpoint ~ Coppell L.L.C. 3. Need to coordinate fight-of-way dedication with Amberpoint plat. SHEET6 1. The Charles Bandemer tract of land is now Coppell Bible Fellowship. 2. Will S/W easement be required at the Sowell property? 3. Is it State Road or Freeport Parkway? 4. Is it necessary to acquire 29 SQ. FT. for lot 32 - Winding Hollow Lane? 5. Why not acquire more fight-of-way to the south of Sandy Lake - just east of Coppell Road South? SHEET8 1. The "6 Lane Divided" roadway section shows 39' for the 3-lane width and 8' minimum for the back-of-curb to fight-of-way width. The Coppell standard roadway section shows 37' for the 3-lane roadway width and 10' minimum for the back-of- curb to fight-of-way width. 2. The "4 Lane Divided" roadway section shows 27' for the 2-lane width and 10' minimum for the back-of-curb to fight-of-way width. The Coppell standard roadway section shows 25' for the 2-lane roadway width and 12' minimum for the back-of- curb to right-of-way width. 3. The "4-Lane Divided" roadway section shows 8" of reinforced concrete. The Coppell standard roadway section shows 7" of reinforced concrete. 4. The "4 Lane Undivided" roadway section shows 54' for the 4-lane width. The Coppell standard roadway section shows 49' for the 4-lane roadway width. 5. The "4 Lane Undivided" roadway sections shows 8" of reinforced concrete. The Coppell standard roadway section shows 7" of reinforced concrete. 6. Two of the roadway sections show lime stabilized subgrade and two of the sections show cement treated subgrade, both at an application rate of 39#/S.Y. Were these treatments and rate of application determined by soil testing? SHEET9 Need to verify ownership of the transmission towers along the north side of Sandy Lake Road. They are labeled as TXU - they may belong to the Brazos Electric Power Corporation. SHEET10 1. Transition rate - lane drops? 2. Is the amount of asphalt shown in the transition necessary - could it be less? 3. Will Royal Lane extend to the north of Sandy Lake? SHEETll I. Label the transmission tower #3 shown at Station 16+45 Lt.. It is located within the proposed sidewalk. 2. The manhole at Station 17+00 Lt. is located within the proposed curb. Will it need to be relocated instead of adjusted? 3. Show the profile of the existing 12-inch water line. The fire hydrant located at Station 16+00 will need to be removed and relocated. 4. Ten-foot left turn lane width does not meet code. What about MTP? 5. What about 70-foot right-of-way? SHEET12 1. The proposed drive shown at Station 19+30 Rt. may no longer be required. Need to coordinate with the Amberpoint development. 2. Label the transmission tower #4 shown at Station 22+10 Lt.. It is located within the proposed sidewalk. 3. There is less than 6 inches of cover between the bottom of the proposed culvert and the tops of the existing 8-inch sewer and 24-inch water lines. They will need to be adjusted. The proposed culvert is constructed over a valve on the existing 24-inch water line. 4. Does the 12-inch water line conflict with the proposed culvert? There is a fire hydrant on the 12-inch water line at Station 22+00 that will need to be removed. 5. Where does the 24-inch water line mm south? SHEET 13 1. Northpoint Drive will intersect Sandy Lake Road at approximate Station 27+50 Rt. This needs to be coordinated with the Amberpoint development and a median opening will be required on Sandy Lake. The road should be completed within 60 days. 2. There is an existing gravel drive on the north side of the street that serves as the primary access to an existing mobile home. Show this drive and provide access from the new pavement. 3. There is a fire hydrant at Station 27+00 that will need to be removed. SHEET 14 1. Label the transmission tower #5 shown at Station 27+50 Lt.. It is located within the proposed sidewalk. 2. Where does the low point fall at the curb inlet at approximate Station 28+90? SHEET 15 1. Label the transmission tower #6 shown at Station 33+00 Lt.. It is shown located the proposed sidewalk. SHEET 16 1. Label the transmission tower #7 shown at Station 40+00 Lt.. 2. Show the existing gravel drive on the north side of the street. provided for this drive? Will an approach be SHEET 17 1. Label the transmission tower #8 shown at Station 40+00 Lt.. SHEET 18 1. The left mm storage length for Oakbend Drive is shown as 50'. The Coppell standard minimum for low volume streets is 60'. 2. The design speed for a 4-lane divided roadway is 50 MPH and the minimum radius for a horizontal curve is 800'. The curve at Station 51+45.90 has a design speed of 40 MPH and a horizontal curve length of 565'. 3. Label transmission tower #9 shown at Station 49+50 Lt.. 4. The top of curb lefl and right are shown at the same elevation. What about the superelevation? SHEET 19 1. There is not an ADA ramp shown on the west sidewalk along the intersection of Coppell Road north. 2. The left mm storage length for Coppell Drive North is shown as 135'. Is 135' of lefi mm storage at Sm. 53+00 adequate in length for the traffic volumes at this intersection? Does this need to be increased to 150'? 3. The 12' tall fence along the north side of Sandy Lake Road from station 55+00 to 59+00 is sitting on top of a 10' to 12' stacked retaining wall. This is not labeled or shown in the cross-sections. Special care will need to be taken during construction to maintain the integrity of the wall. 4. What are the limits of the 8-inch water that is abandoned? It is not labeled as abandoned on Sheet 20. 5. At what angle does Coppell Road tie into Sandy Lake Road? SHEET 20 1. Show the 8-inch water line in the profile. SHEET 22 I. The top of curb lefi and right are shown at the same elevation. What about the superelevation? 2. Where is the adverse crown? Make sure that it is not in the flatter section of the vertical curve. Prefer it not to be in the vertical curve at all. SHEET 23 1. The design speed for a 4-lane divided roadway is 50 MPH and the minimum radius for a horizontal curve is 800'. The curve at Station 69+20.37 has a design speed of 45 MPH and a horizontal curve length of 570.76'. 2. Are crosswalks required at Coppell Road South? SHEET 25 1. Show the 8-inch sanitary sewer in profile. 2. Do gas substation relocation issues exist? SHEET 27 1. Is the left hand turn storage length of 150' excessive for a turn into Whispering Hills? 2. Proposed right-of-way on north side of road (Station 91+00 to 92+00) - replat as current - may not be the best solution. SHEET 28 1. Is a 60' storage lane sufficient for Shadydale Lane? 2. Do crosswalks need to be provided at Shadydale Lane for the school? SHEET 29. 1. The profile does not exist for the road into "Everybody Fits". 2. Does the 10' bike path need to stay within the right-of way at approximate Stations 102+00 to 103+007 SHEET 30 1. More detail is needed for the four drives shown on this sheet since there is no profile. 2. Need to label "end of existing concrete" at approximate Station 110+10. SHEET 31 1. How much of the existing concrete roadway will remain" SHEET 38 1. Why show the ground elevation on the left? 2. Show top-of-curb from the north bound lanes. SHEET 39 1. Are any fill or slope easements required? SHEET 40 1. Show existing grade information from field data and not form A-B. SHEET 41 1. Existing access to future Freeport Parkway north of Sandy Lake - lay-down curb or leave out? 2. May need comer-clip at the southwest comer of Freeport Parkway. 3. Show fight-of-way dedicated by Amberpoint development. SHEET 42 1. Oakbend Drive - inlets to be adjusted to an adequate depth. 2. Low K values are shown on all the intersections. SHEET 43 1. Do we really want to raise the elevation of Coppell Road North - is this because of the 24-inch water line? SHEET 45 1. Will this create a future profile problem such as Coppell Road North, except too high? SHEET 47 I. Summer Place - are the grades shown too dramatic considering that the inlets are proposed just upstream on Sandy Lake? SHEET 48 1. What can be done to discourage any cut-through from Oak Trail to the concrete drive to the west. SHEET 61 1. Furore Northpoint Drive appears to tie into Sandy Lake near Sm. 27+50. Need to verify location. There is a recessed inet that may need to be relocated. 2. There are several existing waterlines and valves in this area that are not shown on the plans. SHEETS 61 - 70 ~, Does Coppell allow the use of RCP storm drain with a diameter smaller than 21 inches? SHEETS 56 - 61 l~The largest inlet size shown in the Coppell standards is 14 feet. Does Coppell allow '~! for 20ofoot inlets? SHEET 67 1. The 24" waterline at Sta. 62+00 may need to be lowered. SHEET 74 1. Two existing sanitary sewer manholes on the north side of the street near Sra. 101+00 are not shown.