[From the U.S. Government Printing Office, www.gpo.gov]
MacMILLAN ASSOCIATES, INC. CONSULTING ENGINEERS 4101 NORTH EUCLID AVENUE BAY CITY, MICHIGAN 48706 FEASIBILITY STUDY FOR STABILIZATION AND PRESERVATION OF THE DAVIDSON DRY DOCK VETERANS MEMORIAL PARK FOR THE CITY OF BAY CITY, MICHIGAN (517) 684-4060 (313) 232-7230 FACSIMILE (517) 684-5581 RECENVED SEP 2 5 1992 U rl.,,@ NAT r@' " - R E- S OU R C E S 11 . Tr-i, Iii I . I ,* @Ii '1,6, iMr. LAND C @, r- U FEASIBILITY STUDY FOR STABILIZATION AND PRESERVATION OF THE DAVIDSON DRY DOCK VETERANS MEMORIAL PARK FORTHE CITY OF BAY CITY, MICHIGAN Prepared by: Richard H. Lyon, P.E. 9 MacMillan Associates, Inc. 4101 N. Euclid Avenue Bay City, MI 48706 MAI Project No. 230805 September 14, 1992 (17 DAVIDSON DRY DOCK September 14, 1992 CITY OF BAY CITY Page 2 TABLE OF CONTENTS Purpose Introduction Condition of Existing Structures Summary Conclusion Recommendations Use Stabilization and Preservation Cost Appendix Exhibit #1 - Location Plan Exhibit #2 - Underwaster Inspection Field Notes Exhibit #3 - Historic Photograph Exhibit #4 - Photographs of Existing Condition Exhibit #5 - Plan - Proposed Preservation Scheme Exhibit #6 - Section - Proposed Preservation Scheme Exhibit #7 - Cost Estimate This document was prepared in part throuth financial assistance provided by the Office of Ocean and Coastal Resource Management, National Oceanic and Atmospheric Administration authorized by the Coastal Zone Management Act of 1972. DAVIDSON DRY DOCK September 14, 1992 ar(OF BAY CITY Page 3 PURPOSE The purpose of this report is to study the present condition and usage of the Davidson Dry Dock, and provide recommendations for it's stabilization, preservation and future utifization. INTRODUCTION The Davidson Dry Dock, located within the Veterans Memorial Park, is the last vestige of the wooden ship building industry that was an important factor in economic growth and prosperity of Bay City, Michigan in the late 1800's and early 1900's. The dry dock was completed in November of 1900 and was used throughout the years for the repair and rebuilding of wooden ships. The dry dock was last used in 1931. The, dry dock is 455 feet long and 80 feet wide, with a width of 60 feet at the entrance. As constructed, the depth of the water in the dry dock was between 14 and 6 feet, depend- ing on the water level of the Saginaw River. The dry dock could be filled in 1 1/2 hours, andl pumped dry in under 2 hours. The dry dock is located in the south portion of the Veterans Memorial Park o n the west bank of the Saginaw River in Bay City, Michigan. In recent years, the park has seen extensive renovation with construction of the Kantzler Arboretum, the construction of the Riverwalk Fishing Pier, and the construction of the Liberty Harbor Municipal Marina. Stabilization of the riverbank through utilization of sheet piling and riprap, ancl construc- tion of paved walking and jogging tracks is ongoing. A large storm sewer pipe dis- chcarges into the dry dock on the west end. CONDITION OF EXISTING STRUCTURES Tho commercial diving division of Townsend and Bottom Services Group, Inc. was re- tairied to perform a visual and tactile inspection of the condition of the.Davidson Dry Dock. On May 22, 1992, this inspection was accomplished and was recorded on audio/video tape. The quality of the visual portion is poor due to the extreme turbidity of the water in the dry dock. A summary of the audio portion of the inspection is included in the appendix of this report, Exhibit #2. SUMMAR The following summarizes the conditions which were observed by the diving team during the inspection: 1. The gate of the dry dock has not been operable for many years, but remains across the entrance. The gate was constructed of wood and the top has deterio- rated considerably. The gate is leaning into the dry dock, and normally is not visi- ble. 2. The bottom of the dry dock has filled with sand, silt and debris. The water is presently about seven to eight feet deep, versus the original depth of fourteen to sixteen feet deep. The bottom surface is very loose and easily disturbed. DAVIDSON DRY DOCK September 14, 1992 CIT(OF BAY CITY Page 4 3. It appears the dry dock was originally constructed of wood, and later a non- reinforced concrete topping and cap was applied. The wood portions were found to be deteriorated at all depths, and in many areas the concrete has cracked and fallen away. 4. The concrete cap has cracked into blocks, and in some areas has fallen into the dry dock. 5. There is visual evidence that the soil around the dry dock has settled causing the dry dock walls to settle and translate, resulting in the top of the dry dock wall to be underwater. Exhibit #4 presents photos which document the present condition of the visible portion of the dry dock. CONCLUSIO There are many external forces acting on the dry dock structure Which have caused the deterioration noted. The park areas around the dry dock have been backfilled creating soil surcharge loads. Ice, water, and the freeze/thaw cycle of many winters has promot- ed deterioration of the concrete surfaces. The continual exposure to water has deterio- rated the structure of the wood. The lack of maintenance for approximately 60 years has allowed the external forces to deteriorate the dry dock un-checked. The dry dock will continue to deteriorate due to the external forces discussed. The area immediately adjacent to the dry dock poses a hazard to persons, due to the unevenness of the grade and the condition of the concrete cap. The condition of the concrete and wood is such that repair is not practical. A complete re-building from new materials would be the only alternative to resore the appearance to it's original condition. The walls of the dry dock are at a slope of approximately 600 from horizontal. The sur- face of the water in the dry dock is normally within three feet from the top of the sloping walls. Under extreme conditions, the water surface would be six feet below the top of the walls. In it's present condition, we feel that catastrophic failure of the dry dock walls should not occur, due to balancing of the soil and hydrostatic pressures on either sides of the wall. We would expect the concrete cap, wall alignment and top elevation to continue to move and subside. The dry dock can remain with no repairs; however, the areas adjacent to the water are a hazard that should be resolved. The dry dock must remain open for the discharge of storm water from the storm sewer which empties into the west end of the dry dock. RE-COMMENDATIONS The historical value of the dry dock is an asset to the community. The dry dock is on the Michigan Register of Historic Sites. Stabilization and preservation of the dry dock should be) undertaken to better utilize the potential of the area for recreational purposes. DAVIDSON DRY DOCK September 14, 1992 CITY OF BAY CITY Page 5 Use Possible uses of the dry dock include: I . Site for a museum vessel. 2. Stilling pond for radio controlled model boating. 3. Fishing, primarily adapted for the handicap. 4. A continuation of the Riverwalk system for relaxation and recreation. 5. For historic and educational markers to depict and explain how a dry dock func- tioned ninety years ago. Stabilizatio -4 Preservatio We recommend the dry dock structure be preserved and stabilized in it's present condi- tion. To achieve this, the following construction is required: 1 . A concrete grade beam installed beyond the existing concrete cap, to allow backfill- ing of the banks to remove the uneven grade which exists. 2. A "Boardwalk" constructed over piling, with a railing along the dry dock. This would create a safe walking surface and keep pedestrians off of the concrete cap. 3. The configuration of the Boardwalk should be constructed to allow various usages, such as model boating and fishing with complete handicap access. Coot A general preservation scheme is presented in Exhibits #5 and #6. We have estimated the cost of this scheme to be $ 565,000.00. A breakdown of the cost is outlined in Exhib- it #7. File: 230805.004 < F 00- N F w > C z EUCLID EUCLID AVENUE CQ- > U) m I z r < rq z ;u > 0 m 0 WENONA AVE. 0 HENRY ST. z r f ---- -u SA PARK r BROADWAY/---, A > z GARFIELD r , A -u q 0 ju > C 6:5 . K a) C 0 (1) 0(fi 00 A z 0 ()o Mac z > VETERANS MEMORIAL. PARK p > rn Co w < 4101 NORTH EUCUD < DAVIDSON PRYPOCK rIMMMIATION 1(517)684-406OA31 EXHIBIT #2 Page 1 of.2 FIELD NOTES - UNDERWATER INSPECTION Project: Davidson Dry Dock Job No.: 230805 Client: City of Bay City Date: 5/22/92 By: Douglas F. Reckinger, P.E. 9:30 Entered water at northwest corner adjacent to storm outlet, heating east while crossing the dry dock. Low visibility. Outlet 3 1/2' H x 6'W. There is a filter on bottom of an adjacent intake pipe. Concrete in good condition. Vertical wood members are rotten. Sift at the bottom is tight. Wood terminates into sift 7' below the water surface. Loose sift at the middle of the dry dock. 9:4.2. Wood pallet found. Flat bottom occurs 4' - 5' from the edge of the dry dock (40' from west end of dry dock) approximate 7' deep. 3' silt at middle of dry dock, can't feel hard bottom. One vertical wood section is rotted away, loose concrete behind. Wood terminates into concrete at base. 9:58 Plank 2x6' at bottom, parallel with wall, 6' long. Horizontal pieces of wood connected to vertical wood, 2 - 3 planks. Rock and gravel bottom (80' from west end of dry dock). South side-horizontal plank at bottom.. 10:11 Chain found, 2" - 3" links, attached to bottom?? Gravel/sand. Loose pipe. Cement chunks at bottom (100'from west end). Pole pushed down thru silt - no bottom detected at the middle. Rock 6'- 7'tall? No, cement broken out from wall. Lumber on side, 3'from surface. Concrete top or curb which may have fallen in, 10'from N. wall. Wall O.K. in area of rock Base is 10' out. 5 horizontal members. Vertical on top of horizontal wood (vertical wood member to the dry dock side of the horizontal member). Horizontal members on top (horizontal wood members to the dry dock side of the vertical member). Chain at horizontal on top of vertical. Horizontal on both sides of vertical wood members. 10:38 Horizontal members rotted, board members, closest to surface Rebar,1/4 rod. Stray piece. 130'from west end. Horizontal members buried. South side 130' out. Horizontal wood members in good shape, (6 good mem- bers). EXHIBIT #2 Page 2 of 2 11:00 Break 12:15 Second dive. 80' from the east end of the dry dock, there is a 1, to 2' gap between the vertical timbers and the wall. This occurs at a 60' section at the south wall, and a much longer area at the north. (Soil at the waters edge is significantly lower in these areas than at surrounding areas). 12:150 Concrete stepped retaining wall - 8' deep water. 1:016; Same concrete wall at the south regarding stepped wall. Steps 4 fingers wide 6" - 10" high. Vertical planks; 12'- 15'ea. 1' wide cement, another wall - 8" wide another wall - on top of wood. Stepping arrangement along the wall. 1:20 Top of gate? Huge bolts. Laying at 350 angle pointing to the west. Bolts leaning to west. Bolts at 8' o. c. Framing members at top of the gate. Top 6 1/2'- 7'wide. 4' wall to the end of the gate. 1:55 Second dive completed. 2:50 Third dive. Stepping at middle of wood section. Step at west end wood area. Scoured under concrete 50' west of steel at south wall. South wall 10' west of decay at mid-wall (settled soil above). 3:30 Diving completed. File: 230805.003 EXHIBIT #3 Historical Photo Undated Looking Northwest SO .4 Me IL AtI-v -4 -Ak EXHIBIT #4 Page 1 of 3 North Bank Looking Southwest A, North Bank Looking Southeast 77 1 J-5- @ " I EXHIBIT #4 T..--Page2of3 Concrete Cap and Deteriorated Vertical Timber, North Bank '77 VIC AL.; 41 North Bank Looking East North Bank Looking West EXHIBIT #4 .3 Page 3 of South Bank Looking South North Bank Looking South Deteriorated Concrete Cap North Bank Looking South Deteriorated Concrete Cap lrj. "OP, EXHIBrT #5 U@ Sarum" =co PROPOSED PROPOSED MID pew OFACM BMW U 4 vouznw" VoUrlso" 00-6- cn z -a z:l z 115), 0 CL propoSED PROPOSIP P--f cn n A EEO" mew.$ < T z %*CUZ"N4.L voUZr9AU Cc C) rpocow wr 0 co --T OL LwW Paz Plys"*ALK SM so" Mv PLAZA ") II IM HAUO"Y rL, 0 r C:@ NM Downs --* +MAW 2 140M "C^T DAVIDSON Lftftrh" I%Qk7w @M tM RIP CA- N&BILDHM" f�STOPUC, FLAC.4k= L?RYDOGK LON PVIM VAIM ML BMW JU 2 cz :z IM or W- saw FU" II- SMlw 9M GQW- PbNJ044,y IDL C4M kbAy lu > > < JM V4ftj04jLy ITM Lzv9L- CHECKED BY LLY. 900-W IMILS RJ-L DR^WM BY r5m DATE C4*�@Mfff JOB NO. cat= NOM 25obcs . @MSITE FLM - FROPO-CED EWATIM SCAJET-0: SHEET tu t- OF AJW FiLEM SAW PLOT SCALE 1-24 DRWG. PLOMED 09/14/92 lOl-.Otl METAL RAILIN& 4xlo 0 2'-6" TREATED 2x6 DEOKIN67@ VARIES EXISTIN& EMANKMENT 0 0 0 0 .. ................ 100 YR. FLOOD VARIES CONCIRZTE ... ... ........ ........ &R-ADE 13M. EX. CONC. MYDOCK kqALL 5515 (4/21/lb) ............ 560.5, (5/q/aw 5 tbh' (all 2/86) PIPE FILE 5'16.6' MEAN LON KATER DATUM SWTION THRU 50AIRDY4ALK ;'2 18=1 . . . . . . . . .. . . . . C-- rrl IATES a > 2 MaeMLUN U. VETERANS MEMORIAL PARK ASSOC w z in CONSULTING ENGINEERS 0n wo DAVIDSON PRYPOCoK F SERVATION 4101 NORTH EUCUD AVENUE BAY ClTY, MICHIGAN 48706 < -< 1(517)684-406OA313)232 7230/ FAX (517)684-5581 EXHIBIT #7 COST ESTIMATE DAVIDSON DRY DOCK STABILIZATION VETERANS MEMORIAL PARK ITEM TOTA General Conditions $ 40,000 New Boardwalk Site Preparation 30,000 Concrete Grade Beam 40,000 Pipe Piles 50,000 Walkway Deck and Handrail 165,000 Lighting 20,000 Benches and Trash Recepticals 10.00 315,000 Drydock Gate Remove Existing Gate-and Erect on New Display 20,000 Install New Gate, Abutments 60, 80,000 New Concrete Sidewalks 4,000 Miscelaneous Landscaping 20,000 Riprap 9,000 Sheetpiling Cap 2. 31,000 Design, Construction Engineering, Contingincies; 95.40 Total $565,000 NOAA COASTAL SERVICES CTR LIBRARY 1 3 6668 14112004 0 I I I I I I I I I I I I I I I I I I